Lynovation CTR2-Micro Radio Control Instruction Manual

The CTR2-Micro is a compact controller that enhances the
functionality of your radio setup. This manual provides detailed
information on how to make the most out of this product.

Getting Started

Before using the CTR2-Micro, ensure that it is compatible with
your radio system. Refer to the section ‘Works with Flex’ for
compatibility details.

Customization Options

The controller offers various options for customization, such as
Rotary Encoder Options and CAT Polarity Strapping Options. Choose
the options that best suit your setup.

Micro Features

Explore the different features of the CTR2-Micro, including
quick access buttons and display options. Familiarize yourself with
these features for efficient operation.

Radio Menus

Learn how to navigate through the radio menus specific to your
radio model. Understand the special features available in different
menu systems like Elecraft Menu, Flex 6000 Menu, and Thetis
Menu.

FAQ

Q: How do I connect the CTR2-Micro to piHPSDR?

A: Refer to the ‘Connecting to piHPSDR’ section for detailed
instructions on establishing a connection between the controller
and piHPSDR.

Q: What are the Encoder Rules mentioned in the manual?

A: The ‘Encoder Rules’ refer to the guidelines on effectively
using the rotary encoder options provided with the controller.
Check the ‘Quick Start Guide’ for more information.

“`

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CTR2-Micro Operation Manual
v1.06.04
Last Revision: August 8, 2025 Copyright 2023-25 Lynovation.com All rights reserved Updated to firmware v1.06.04 Revised sections for this version are highlighted in yellow

Contents
Introduction ……………………………………………………………………………………………………………………………….. 8
Legal Notice………………………………………………………………………………………………………………………………… 8
How to use this manual ……………………………………………………………………………………………………………….. 9
Change Log…………………………………………………………………………………………………………………………………. 9 v1.06.04 July 16, 2025………………………………………………………………………………………………………… 9
The Micro Environment ……………………………………………………………………………………………………………… 11 Works with Flex …………………………………………………………………………………………………………………. 12 One Controller, Many Radios……………………………………………………………………………………………….. 13
Micro Hardware ………………………………………………………………………………………………………………………… 13 Where’s the Display? ………………………………………………………………………………………………………….. 14 Morse to the Rescue!………………………………………………………………………………………………………….. 14 Screen Reader Support ……………………………………………………………………………………………………….. 14 Voice Synthesizer and Remote Display Support ……………………………………………………………………… 15
Options…………………………………………………………………………………………………………………………………. 15 Rotary Encoder Options (OPTION1A or OPTION1B) ………………………………………………………………… 15 CAT Polarity Strapping Options (OPTION2A or OPTION2B)………………………………………………………. 16
Micro Features ………………………………………………………………………………………………………………………….. 16
Out of the Box …………………………………………………………………………………………………………………………… 18
Quick Start Guide ………………………………………………………………………………………………………………………. 18 The Encoder Rules! …………………………………………………………………………………………………………….. 18 Other Features You Will Want to Know About……………………………………………………………………….. 19
Multi-Function Buttons………………………………………………………………………………………………………………. 20
Display Options …………………………………………………………………………………………………………………………. 21
Standalone Configurations………………………………………………………………………………………………………….. 21 CW Speedster…………………………………………………………………………………………………………………….. 21 FT Deluxe…………………………………………………………………………………………………………………………… 22 PCR1000 Deluxe …………………………………………………………………………………………………………………. 22 Flex-ible Options ………………………………………………………………………………………………………………… 22 Power Up Options………………………………………………………………………………………………………………. 22
Home Page Telnet Terminal……………………………………………………………………………………………………… 23
Home Page Web Browser ………………………………………………………………………………………………………… 23
Common Controls ……………………………………………………………………………………………………………………… 24 Terminal Keyboard Controls ………………………………………………………………………………………………… 24 Multi-Function Buttons……………………………………………………………………………………………………….. 26 Button Short-Press and Long-Press ………………………………………………………………………………………. 26 Standalone Menu Block ………………………………………………………………………………………………………. 27
Menu System ……………………………………………………………………………………………………………………………. 27 Accessing the Menu System ………………………………………………………………………………………………… 27 Menu Timeout …………………………………………………………………………………………………………………… 28 Menu Navigation ……………………………………………………………………………………………………………….. 28

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Text Editor…………………………………………………………………………………………………………………………. 28 Value Editor……………………………………………………………………………………………………………………….. 29 Menu Code Reports ……………………………………………………………………………………………………………. 29 Context Sensitive Help ………………………………………………………………………………………………………… 29 Main Menu……………………………………………………………………………………………………………………………. 29 Quick Key Menu …………………………………………………………………………………………………………………….. 30 Power Up Function …………………………………………………………………………………………………………….. 30 Quick Key Configuration Menu …………………………………………………………………………………………….. 30 Function Buttons Option Menus ………………………………………………………………………………………….. 30 Frequency Menu ……………………………………………………………………………………………………………………. 31 Direct Frequency Entry ……………………………………………………………………………………………………….. 32 Zero Low Digits…………………………………………………………………………………………………………………… 32 Previous Frequency/Mode Menu …………………………………………………………………………………………. 32 RIT ……………………………………………………………………………………………………………………………………. 33 Database …………………………………………………………………………………………………………………………… 33 Load from Memory Menu……………………………………………………………………………………………………. 33 Save to Memory Menu ……………………………………………………………………………………………………….. 34 Rename/Erase Memory Menu …………………………………………………………………………………………….. 34 Report Frequency/Mode …………………………………………………………………………………………………….. 34 VFO Menu …………………………………………………………………………………………………………………………….. 35 VFO-A/VFO-B …………………………………………………………………………………………………………………….. 35 Memory Tuning………………………………………………………………………………………………………………….. 35 Range Tuning …………………………………………………………………………………………………………………….. 35 Ctrl VFO …………………………………………………………………………………………………………………………….. 35 VFO Lock …………………………………………………………………………………………………………………………… 36 Start Scan ………………………………………………………………………………………………………………………….. 36 A to B………………………………………………………………………………………………………………………………… 36 B to A………………………………………………………………………………………………………………………………… 36 Swap A/B…………………………………………………………………………………………………………………………… 36 Band Menu……………………………………………………………………………………………………………………………. 37 Mode Menu ………………………………………………………………………………………………………………………….. 37 Tx Enable (Transmitter Interlock) …………………………………………………………………………………………. 37 External Tuner Mode ………………………………………………………………………………………………………….. 38 Tx Message Menu ………………………………………………………………………………………………………………….. 38 Edit Tx Message Menu ……………………………………………………………………………………………………………. 39 Message Prosigns……………………………………………………………………………………………………………….. 39 Keyer Menu…………………………………………………………………………………………………………………………… 40 Speed ……………………………………………………………………………………………………………………………….. 40 Spacing ……………………………………………………………………………………………………………………………… 40 KeySTone (Key Out Sidetone) ………………………………………………………………………………………………. 40 Sidetone (Frequency)………………………………………………………………………………………………………….. 40 Type………………………………………………………………………………………………………………………………….. 41 Paddles (Reverse)……………………………………………………………………………………………………………….. 42 Pdl PTT (Use Paddle In Jack for PTT) ……………………………………………………………………………………… 42 Kybd Kyr (Keyboard Keyer) ………………………………………………………………………………………………….. 42 Beacon Mode …………………………………………………………………………………………………………………….. 43 Navigation/Edit (Paddles) ……………………………………………………………………………………………………. 45 Practice Menu ……………………………………………………………………………………………………………………. 46 Call …………………………………………………………………………………………………………………………………… 49 Serial Number ……………………………………………………………………………………………………………………. 49 Exchange …………………………………………………………………………………………………………………………… 49

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Configuration Menu……………………………………………………………………………………………………………….. 50 WiFi Menu…………………………………………………………………………………………………………………………. 50 Radio Profile Menu …………………………………………………………………………………………………………….. 52 Name (Radio Profile)…………………………………………………………………………………………………………… 53 CAT Menu …………………………………………………………………………………………………………………………. 53 Connection Menu ………………………………………………………………………………………………………………. 53 Settings Menu ……………………………………………………………………………………………………………………. 54 Report Menu……………………………………………………………………………………………………………………… 55 Manage Files ……………………………………………………………………………………………………………………… 59
Radio Menus …………………………………………………………………………………………………………………………. 59 Radio Menu Special Features ………………………………………………………………………………………………. 59
Elecraft Menu………………………………………………………………………………………………………………………… 60 Flex 6000 Menu……………………………………………………………………………………………………………………… 61
Flex Network CW Keying and PTT …………………………………………………………………………………………. 64 Icom Menu ……………………………………………………………………………………………………………………………. 65 Kenwood Menu……………………………………………………………………………………………………………………… 66 Hamlib NET rigCtl Menu………………………………………………………………………………………………………….. 67 PCR1000 Menu………………………………………………………………………………………………………………………. 68 piHPSDR Menu ………………………………………………………………………………………………………………………. 69
Connecting to piHPSDR……………………………………………………………………………………………………….. 69 Thetis Menu ………………………………………………………………………………………………………………………….. 70
Connecting to Thetis …………………………………………………………………………………………………………… 70 Xiegu Menu …………………………………………………………………………………………………………………………… 71 Yaesu FT Menu ………………………………………………………………………………………………………………………. 71
Advanced Configurations……………………………………………………………………………………………………………. 73 Operation with WSJT-X, N1MM Logger, and 3rd Party Apps…………………………………………………………. 73 Connecting to N1MM+ ……………………………………………………………………………………………………….. 73 Connecting to WSJT-X …………………………………………………………………………………………………………. 74 Connecting Multiple Micros…………………………………………………………………………………………………….. 75 Linking Micros and Minis ………………………………………………………………………………………………………… 75 Setting up an ad hoc network ………………………………………………………………………………………………. 76 Possible Workaround for the Cell Phone Hotspot CGNAT Block ……………………………………………….. 77 PCR-1000 Receiver Remote Control Oddities …………………………………………………………………………. 77
CAT Oddities……………………………………………………………………………………………………………………………… 77
Active VFO Control on Older Kenwood Radios ……………………………………………………………………….. 78
Appendix A: Detailed List of Micro Features …………………………………………………………………………………. 79
Appendix B: Loading and Updating the Firmware ………………………………………………………………………….. 81
Windows Users ……………………………………………………………………………………………………………………… 82 Download EspressIF Flash Download Tools ……………………………………………………………………………. 82 Run Flash Download Tools…………………………………………………………………………………………………… 82 Unzip the CTR2-Micro Firmware Update File …………………………………………………………………………. 83 Map .BIN files in the Download Tool …………………………………………………………………………………….. 83 Select the Micro’s COM Port………………………………………………………………………………………………… 84 Download the Firmware ……………………………………………………………………………………………………… 84
Linux and Mac Users ………………………………………………………………………………………………………………. 85 Find the USB Port Assigned to the Micro……………………………………………………………………………….. 85 Make Sure You Have Privileges to the dialout Group………………………………………………………………. 85 Edit the CTR2-Micro-Install.sh Script File……………………………………………………………………………….. 85

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Make the Script Executable …………………………………………………………………………………………………. 85 Python Script……………………………………………………………………………………………………………………… 86 Execute the Script ………………………………………………………………………………………………………………. 86
Appendix C: First Time Configuration …………………………………………………………………………………………… 87 Finding the Micro’s Serial Port in Windows ……………………………………………………………………………….. 87 Finding the Micro’s Serial Port in the Mac or Linux …………………………………………………………………….. 87 Calibrate the MFBs…………………………………………………………………………………………………………………. 89 Configure the Keyer ……………………………………………………………………………………………………………….. 89 CAT Polarity Jumpers/DIP Switch Settings …………………………………………………………………………………. 89 Select the Radio CAT Protocol………………………………………………………………………………………………….. 90 Set the CAT Baud or IP Address ……………………………………………………………………………………………….. 90 Startup Title Page…………………………………………………………………………………………………………………… 91
Appendix D: Configuring Tera Term……………………………………………………………………………………………… 92
Appendix E: Configuring Putty …………………………………………………………………………………………………….. 93 Serial Session…………………………………………………………………………………………………………………………. 93 IP Session………………………………………………………………………………………………………………………………. 94 Find your Micro’s IP Address ……………………………………………………………………………………………….. 94 Micro’s Telnet Port …………………………………………………………………………………………………………….. 94 Configure the IP Session ……………………………………………………………………………………………………… 94
Appendix F: Web Server……………………………………………………………………………………………………………… 95 Connecting to the Web Server……………………………………………………………………………………………… 95 Home Page Description ………………………………………………………………………………………………………. 95
Menu Page ……………………………………………………………………………………………………………………………. 98 Browser Issues ………………………………………………………………………………………………………………………. 98
Keyboard Entry ………………………………………………………………………………………………………………….. 98 Keyer Navigation………………………………………………………………………………………………………………… 99 Menu Selection ………………………………………………………………………………………………………………….. 99 Multiple Devices Controlling the Micro …………………………………………………………………………………. 99 Server Locked vs Server Unlocked ………………………………………………………………………………………… 99 Frequency Updates Appending to the Bottom of the Home Page …………………………………………… 100
Appendix G: Menu Structure …………………………………………………………………………………………………….. 101 Menu Lists …………………………………………………………………………………………………………………………… 102 Main Menu………………………………………………………………………………………………………………………. 102 Quick Keys Menu ……………………………………………………………………………………………………………… 103 Frequency Menu ………………………………………………………………………………………………………………. 105 VFO Menu ……………………………………………………………………………………………………………………….. 107 Band Menu………………………………………………………………………………………………………………………. 107 Mode Menu …………………………………………………………………………………………………………………….. 108 Tx Message Menu …………………………………………………………………………………………………………….. 108 Edit Tx Message Menu………………………………………………………………………………………………………. 108 Keyer Menu……………………………………………………………………………………………………………………… 109 Configure Menu ……………………………………………………………………………………………………………….. 112 Radio Menu……………………………………………………………………………………………………………………… 117
Appendix H: Accessibility ………………………………………………………………………………………………………….. 118
Why This Appendix?……………………………………………………………………………………………………………… 118 Hardware Walk Around ………………………………………………………………………………………………………… 118
Orientation………………………………………………………………………………………………………………………. 119

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Multi-Function Buttons (MFBs) and LED ……………………………………………………………………………… 119 Volume Control………………………………………………………………………………………………………………… 119 CAT Polarity Settings…………………………………………………………………………………………………………. 119 USB-C Connector………………………………………………………………………………………………………………. 120 Paddle and Radio I/O Jacks ………………………………………………………………………………………………… 120 Using the Micro with a Screen Reader…………………………………………………………………………………….. 120 The CTR2-Voice Speech Synthesizer ……………………………………………………………………………………….. 121 CTR2-Display Firmware …………………………………………………………………………………………………………. 122
Appendix I: Connecting to Other Programs …………………………………………………………………………………. 122 Connecting to Thetis …………………………………………………………………………………………………………….. 122 Connecting to piHPSDR …………………………………………………………………………………………………………. 122 Connecting to wfview …………………………………………………………………………………………………………… 122
Appendix J: Radio I/O Wiring Diagrams ………………………………………………………………………………………. 123
Appendix K: Previous Revision Changes ……………………………………………………………………………………… 128

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Introduction
CTR2-Micro (herein referred to as the Micro) is a fourth generation CTR2 radio controller. In this iteration every effort has been made to reduce the size, complexity, and cost of the unit. The end result is a small controller that almost anyone can afford, fits in your pocket, and includes more features than CTR2-Mini. The Micro supports all of the radios (including the Flex 6000 series radios) found in the Mini for not much more than the Seeed Studios Wio Terminal that is used on the CTR2Mini.
The Micro supports several accessibility options for blind and sight limited radio operators including a line item text report to a terminal display for screen readers and support for CTR2-Voice, a new standalone voice synthesizer that allows anyone to control the Micro and their radio without a display.
The Micro is available in two forms.
1. Kit: A complete kit of components to build your Micro. The kit includes everything you need to assemble the unit including a CNC machined enclosure, labels, and a nice aluminum knob with a finger dimple. The Micro is easy to build and would make a great club build project.
2. Fully assembled: If you don’t want to, or can’t build a kit I can build it for you for a reasonable cost.
Legal Notice
What would a manual be without a legal notice? Here goes…
· This is a hobby endeavor, not a commercial enterprise. Nothing is guaranteed! Use this device at your own risk!
· I will do my best to make sure you receive functioning hardware if you buy the assembled unit and will work with you if there is a problem with your unit on arrival.
· I cannot guarantee or warranty the hardware supplied in the kit. · I make no warranty that the firmware provided for the Micro will perform up to your
expectations or be suitable for your application. Software bugs are a fact of life and I try to find and correct all bug reports to the best of my ability ASAP. · Many of the features in the firmware are experimental. If you find a problem with any of them let me know. · International shipping can be risky. I use USPS to ship because it is 75% cheaper than Fed Ex or UPS. USPS International First Class doesn’t provide package tracking once it leaves the US and I have had a couple of shipments disappear, never to seen again.

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How to use this manual
This manual should be used as a reference manual. An expanded Help system if you will. Items in the Table of Contents link to their write up in the manual. The main categories have short write ups describing the functions available in that section. I’ve tried to group things logically and have added hyperlinks so you can quickly jump to other sections.
As this document evolves, sections that have changed since the last update will be highlighted in yellow.
The version number of this manual will follow the latest released version number of the firmware.
Feel free to contact me if you have question about a certain feature or have ideas for future improvements. I love to get feedback on my work. My email address is good on QRZ.com.
Change Log
v1.06.04 August 8, 2025 · Added a new link to download Tera Term. Get it from the CTR2 Group IO File folder here.
v1.06.04 July 16, 2025 · Updated Hamlib rigCtl for better protocol support · Update Keyer Speed and Spacing if changed on Flex radio · Improved the TS2000 emulation for 3rd party programs such as WSJT-X and N1MM and added additional information to the manual for setting up these apps
v1.06.03a May 30, 2025 · Added information on using the screen command in Mac and Linux for a terminal interface
v1.06.03 December 1, 2024 · Fixed a bug in the Thetis protocol that was causing the Zero Beat command to be sent every 10
seconds when polling status on the radio.
v1.06.02 October 7, 2024 · Fixed the NET rigCtl protocol so it works with sBitx radios now. · Fixed timing in keyer Iambic-B mode wasn’t inserting extra element properly · Debugged Thetis and piHDR protocols · Don’t turn Tx Enable off when switching between slices or in Split mode on Flex · Added some minor enhancements for CTR2-Voice support
v1.06.01 April 24, 2024 · Fixed bug that blocked changing how CTR2-Voice pronounces numbers until a power cycle · Reformatted Help text so it appears properly on Putty terminal sessions · Added the Operation with N1MM Logger+ section
v1.06.00 April 9, 2024 · Added Appendix I describing how to connect to other programs such as Thetis, piHPSDR, and
wfview

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v1.06.00 April 8, 2024 · Added the Thetis and piHPSDR protocols · Re-ordered the CAT menu into alphabetical order · Renamed the Yaesu FTdx CAT protocol to Yaesu FT since this protocol supports many of the FT
models such as the FT-450, FT-710, and FT-991. · Changed how the Report MFB works
o If a Report Type is selected and Report is muted pressing this button unmutes the report and reports the frequency and mode The Report stays unmuted until you press Report again.
o If Report is unmuted with long-press on encoder or in the Configure -> Report menu this button plays the short report (freq, mode, tuning digit, Tx Enable status, and Smeter) and does not mute the report.
Changes to previous versions can be found in Appendix K.

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The Micro Environment
The Micro is part of the CTR2 radio control ecosystem.
Its primary design goals were to reduce the size, complexity, and cost of CTR2-Mini while providing an enhanced feature set.
The Micro gives up the built-in display of the Micro but in return it offers an extremely small (60x60x20mm) multi-function control that can serve multiple needs.
This drawing shows how the Micro interfaces to your station. It is powered by a USB-C connection to a USB port on your computer (or any other USB power source). A serial terminal program runs on the station computer and provides a display to configure the Micro for your needs. Once the WiFi link is configured you can use a network based Telnet terminal program or a web browser on your cell phone or tablet to view and control the Micro.
The Micro features a built-in keyer so your paddles plug into the left 3.5mm (1/8″) jack on the Micro. The right 3.5mm jack interfaces to the Key and PTT inputs of your radio. The Paddle PTT option in the Keyer menu allows you to use your paddles or a straight key to key PTT on your radio when using voice modes.
The center 3.5mm jack on the Micro connects to your radio’s serial CAT port. An external DIP switch or an internal jumper header is used to configure the CAT signal polarity.
The Micro was designed to run in standalone mode. It can provide frequency and mode updates in addition to menu navigation updates using Morse code or it can send unformatted text to a terminal program for a screen reader to announce. You can also use CTR2-Voice and CTR2-Display when operating standalone and CTR2-Voice can be setup as an access point so no external router is needed.

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You can find more information about report modes in the Configure Report Menu section. A full description of the menu system can be found in Appendix G: Menu Structure.
A full text description of the Micro’s hardware can be found in Appendix H: Accessibility.
The Micro’s small size and ruggedness means you can find a place for it on the busiest operator desk and easily take it with you for POTA operations.
Works with Flex
Using the Micro on a Flex radio couldn’t be easier. The Micro supports the Flex Network API for radio control (CAT). It primarily functions is a physical tuning knob but has the ability to send Key and PTT over the network so it makes and ideal companion for SmartSDR for Windows or iOS on an Apple device.
You can even deploy multiple Micros on your Flex with each controlling a different slice receiver, or each having a dedicated function like volume, AGC-T, Power Out, NR, etc.
If you have another radio that uses serial CAT you can create separate Radio Profiles for each radio and instantly switch between the Flex and the other radio. You can even create a profile for each slice on your Flex radio.
Remote Flex Operation Many users control their remote Flex radio with the Micro. While the Micro doesn’t support SmartLink you can forward port 4992 through your station’s router to connect to your radio from the internet. The Micro supports network control of both PTT and Key functions on your radio so you can use the Micro and a set of paddles for CW and for keying PTT when the Keyer->Paddle PTT option is enabled.
This is a security risk because port 4992 is open to anyone that wants to use it. To minimize this risk it is recommended that you only forward this port when you want to connect to your radio. This can be achieve by using a VPN to access your router remotely or by using a program such as SplashTop to connect a remote computer to your station’s computer. Running SmartSDR on your station’s computer and accessing it remotely has the added benefit of not requiring SmartLink to operate remotely.
Another option is to use an internet power switch to power down your radio when you aren’t using it. This eliminates any security risk of having port 4992 forwarded through your router because there’s not device to connect to.

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One Controller, Many Radios
The Micro supports up to 10 radio profiles. You can create a profile for every radio in your shack and use the Micro to control each of them. With serial based CAT controlled radios, I recommend ordering OPTION2B, the external DIP switch for CAT polarity configuration shown in the diagram below. This allows you to change the CAT polarity without opening the case when changing radios. This diagram shows how to use 4-port 3.5mm (1/8″) stereo switch boxes to route the CAT and PTT/Key signals to each radio. Blue cables are CAT cables and green cables are PTT/Key cables. Cables are identified by part #. You can build them yourself or order them from the Radio Interface Cables page.

Micro Hardware
The Micro is based on the Seeed Studios Xiao ESP32C3 microcontroller. This tiny processor supports all of the Micros I/O and includes WiFi. The Micro includes a radio I/O circuit that supports TTL (Normal), Inverted (RS232), and Icom CI-V CAT levels. Three 3.5mm (1/8″) stereo jacks across the top of the Micro provide connections for your paddles, radio CAT I/O, and Key/PTT. The WiFi antenna is under the PCB. Even though it’s compact, it’s easy to build because all for the SMT components are pre-installed and the through-hole components all mount on the top of the PCB.
Operator controls include a rotary encoder and three small pushbuttons. These are programmable multi-function buttons and they are referred to as MFB1, MFB2, and MFB3. MFB1 and MFB2 are grouped together at the bottom left and MFB3 is by itself at the top left. The sidetone volume can be changed by inserting a small screwdriver into the hole in the bottom right corner of the unit.
If you ordered the external DIP switch option the DIP switch is found on the bottom edge of the unit next to the volume control. Instructions for setting the DIP switches (or internal CAT strapping) can be found here.

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For those that has limited sight, a full description of the Micro can be found in Appendix H.

An LED provides a visual indication of Micro’s state as shown in the table below.

Flash Sequence

Meaning

2 second rate

Tx interlock DISABLED

Single flash WiFi is Off

1 second rate .25 second rate

Tx interlock ENABLED Radio is KEYED

2 second rate

Tx interlock DISABLED

Double flash WiFi is On 1 second rate .25 second rate

Tx interlock is ENABLED Radio is KEYED

You’ll need interface cables to connect the CAT I/O and Key/PTT outputs to your radio. You can either build your own or I can supply them. My blog has the information you’ll need on cable options. Cable diagrams can be found in Appendix J.

Where’s the Display?

There is no display on the Micro. This saves a lot of money and allows the unit to be much smaller. It also makes the Micro pretty rugged. The entire controller fits in an inexpensive 60mm x 60mm x 20mm (2-3/8″ x 2-3/8″ x 7/8″) snap together Hammond enclosure.

There are several methods for interacting with the Micro including terminal mode, web page, or Code, Voice, or Print reports. To initially configure the Micro you’ll need to connect it to your computer’s USB port and use a serial terminal program such as Tera Term or Putty. See Appendix D for information on Tera Term and Appendix E for information on Putty. Once you have the WiFi port configured you can use Putty or a web browser to connect to the Micro over the network with your cell phone or tablet. Better yet, redeploy that old cell phone that’s been sitting in your sock drawer since your last phone upgrade as a permanent display.

Morse to the Rescue!

Once configured, a display isn’t required for the Micro for simple functions like tuning your radio, setting the tuning step, or adjusting the keyer’s speed. For more advanced functions the Micro has the unique ability to communicate with you using Morse code. There are several levels of code reporting that can
be enabled that send frequency, tuning step, radio mode, menu, and setting information. Even if you’re not currently proficient with code, you’ll find this is a great incentive to improve your code skills. Because the code report runs at a minimum of 15 wpm (with adjustable spacing down to 5 wpm)
you’ll quickly increase your code speed and proficiency. Besides, what could be more `ham radio’ than a radio interface that you can build yourself and talks to you in code!

Screen Reader Support

Blind and limited sight operators typically rely on screen readers such a Microsoft Navigator or NVDA to read the text on the display. While these work well, they can be a problem on busy displays or on displays that update frequently. The Micro provides a Text Report mode that sends a single line of text to the terminal to optimize screen reader output. For example, when you change the frequency on your radio with either the Micro’s encoder or the radio’s dial, the new frequency will be sent to the terminal

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for the screen reader to announce. In this mode, when you open a menu the entire menu is not displayed, only the menu’s name and the selected menu item will be sent to the terminal. The new line appears at the bottom of the terminal window and previous lines move up the page, similar to how a command line interface works.
NOTE: While in Text Report mode think of your screen reader as just a speech synthesizer. There is no need to navigate around the screen. Just keep the terminal program in focus.
Once you understand the menu structure of the Micro you’ll be able to easily navigate around the program using the screen reader. A complete listing of all the Micro’s menus can be found in Appendix G: Menu Structure.
If you get lost at any time just press the [F1] key and a help screen will be displayed with a description of the current state of the program.
Voice Synthesizer and Remote Display Support
CTR2-Voice and CTR2-Display have recently been added to the CTR2 product line. CTR2-Voice can be used instead of using a screen reader. CTR2-Voice announces radio parameters as they change and selected menu items when you have a menu open. CTR2-Voice could be used in a mobile situation where you need to keep your eyes on the road. CTR2-Display is a software solution that runs on a Seeed Studios Wio Terminal. It simply displays the text that would be sent to CTR2-Voice. Both units connect to the Micro using WiFi UDP and can be used at the same time by selecting Display+Voice in the Configure -> Report -> Report Type menu.
See Appendix H for more information on accessibility.
Options
There are four options that allow you to personalize your Micro to fit your needs.
Rotary Encoder Options (OPTION1A or OPTION1B)
Rotary encoders come in two styles, smooth and with detents. Most prefer smooth encoders for tuning radios and detent encoders for volume controls and the like. The Micro does both, so you can order either style. I recommend going with Option1A, the detent encoder, especially if you plan on using the Micro without a display (i.e. in Morse reporting modes). When running without a display you’ll get very familiar with the menu structure and a detent encoder makes it much easier to `count’ the tuning steps or menu items using the `detent bumps’ in the encoder.
A smooth encoder (no-detents) will be supplied if you order Option1B. With the smooth encoder you’ll need to change the Encoder Type to No-Detent (slow) in the Config->Calibrations menu. This change slows the encoder down by ½ while you’re in the menu system so it’s easier to select a menu. The smooth encoder is great if you plan on using a display with your Micro.

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Some have asked why an optical encoder isn’t offered as an option. Quite simply, it is due to the cost of the optical encoder. You can easily spend more for the encoder that you pay for the Micro kit so it just doesn’t make sense for this device.

CAT Polarity Strapping Options (OPTION2A or OPTION2B)
Option2A specifies an internal 16-pin dualrow header with jumpers to configure the serial CAT polarity. This provides the cleanest exterior but requires the Micro to be disassembled to change the jumpers.
Option2B, shown here, replaces this header with an externally accessible 8-position DIP switch. The DIP switch allows you to change the CAT polarity without opening the Micro’s case. I recommend ordering the DIP switch option if you have several radios that use different CAT configurations and you want to use Radio Profiles as shown here. If you’re a Flex user, have only one radio, or all of your radios use the same CAT configuration you don’t need the DIP switch option.
Instructions for setting the DIP switches, or internal headers, for the proper CAT polarity can be found in the CAT Polarity Jumpers/DIP Switch Settings section.
NOTE: Regardless of which jumper option you choose you should always configure the serial CAT port jumpers/switches for one of the polarity options to provide the required pull-up voltages to the processor’s input pins.
Micro Features
Even though it’s called a Micro, there is nothing small about its feature set. At its core, the Micro is a radio controller with an integrated keyer. It does almost everything its larger sibling, CTR2-Mini, does but at a greatly reduce price.
If all you want is a remote tuning knob for your radio (especially if you have a Flex radio or other SDR radio), or a memory keyer, just configure the Micro once, set it on your desk, and just use it without a display. See the Standalone Configurations section for a few suggestions.
But if that’s all you use your Micro for, you’re missing the fun! The Micro offers many other features including:
· It can control a wide variety of radios using serial or IP CAT including Flex, Anan or Hermes Lite 2 (using Thetis or phHPSDR protocols), most Icoms, Kenwoods, newer model Yaesu radios in the

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FTdx line (and other Yaesu models running the Kenwood protocol), Yaesu FT-817 and FT-100, Elecraft, Xiegu, QCX, and even the trusty old Icom PCR1000. · Flex users can use one Micro for each slice on their radio , each with its own settings and favorite frequency list even for SmartSDR v2 users · The Code Report sends radio settings changes, and menu item text in code for standalone operation great for blind or limited sight operators or those wishing to increase their code proficiency · The Text Report leverages the Code Report features to provide enhanced support for screen readers · The Voice Report sends program status and radio parameters to CTR2-Voice, a WiFi speech synthesizer, allowing blind and sight limited users to control the Micro and their radios · Easy frequency tuning resolution setting just press and hold then turn the encoder to change · Two VFOs even on radios with only one VFO (like the Flex) or on dual-receivers (like the FTdx101) · Control A VFO and B VFO on your radio with the Micro’s VFO-A and VFO-B. Instantly switch between the two, or use both of the Micro’s VFO’s on your radio’s A VFO. · 10 radio profiles allow you to save settings for different radios and instantly recall them. · 100 favorite frequencies/mode settings for each VFO and MFB settings are saved in each radio profile · A shared frequency/mode database that is accessible from any radio profile. · Memory tuning makes it easy to check the frequencies in your favorite frequency list · Range tuning allows you to stay within the contest or satellite transponder range · The last 25 frequencies/modes you visited can be instantly recalled. You can also lock previously visited frequencies so they remain on the Previous Frequency list. · Zeroing the digits below the tuning digit makes it easy to get on an exact frequency · Receive Incremental Tuning (RIT) on radios that support it · Easy access to many radio functions assign them to the FKeys on your keyboard or the MFBs · Commonly used menus and features are assigned to Shortcut keys for easy access · External tuner mode (automatically sets power and mode for an external tuner then resets it when you’re done) · Fourteen 75 character CW messages with prosigns for inserting your call, contact serial #, contest exchange, a long `T’ for 0, or temporarily increasing speed 50% for those 599 reports. 10 messages are permanently assigned to the terminal keyboard’s FKeys, 5 messages can be assigned to the MFBs on the Micro. · Prosigns based on the K1EL v3.0 standard · Code Practice mode sends random character groups, calls, and Q-signals using the Koch method · Control of your radio over the internet from your PC, cell phone, tablet, a CTR2-Mini, or another Micro · 3rd party programs are supported (WSJT-X, logging programs, etc) the Micro emulates the Kenwood TS-2000 on its USB serial port. CAT PTT is supported so there is no need for another keying interface. · Control your radio remotely using a terminal program or a web browser on your cell phone or tablet, or use another Micro or a CTR2-Mini connected to the CTR2-Micro in your shack

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· Beacon control mode allows the Micro to be used as a browser enabled beacon controller when you’re not using it.
· Use the Paddle Input jack for a remote PTT switch in voice modes · Use the Micro with CTR2-Display and/or CTR2-Voice for standalone operation
See Appendix A for an exhaustive list of features.
Out of the Box
When you receive your Micro you’ll need to provide a USB-A to USB-C cable to connect it to your PC. Some USB cables only support power and not data. Make sure you are using a data cable. If a new virtual serial port isn’t created on your PC when you plug the Micro in for the first time, you’re probably using a power-only USB cable.
Since the USB-C connector is on the side of the Micro consider using a cable with a 90 degree USB-C connector so the USB cable follows the same route as the other cables plugged into the Micro.
Assembled units and kits ordered after December 1, 2023 will have firmware pre-loaded on the processor. You should check for updated firmware here and periodically update your Micro so you can get the latest feature enhancements and bug fixes. Instructions for programming your Micro can be found in Appendix B: Updating the Firmware.
When you first connect your Micro you’ll need to initialize it. Instructions for this are contained in the Appendix C: First Time Configuration section.
Quick Start Guide
You’re probably eager to start using your Micro running after you’ve completed the First Time Configuration. This section will give you the basic methods of operation so you can start exploring the Micro’s features.
The Encoder Rules!
The Micro was designed to be operated with just the encoder. The multi-function buttons (described next) were added to give you quick access to the features you use the most. You’ll need to connect a Telnet terminal or web browser to you Micro in order to see the menus. You can find detailed information on doing this in Appendix D and E. The web server is described in Appendix F.
The encoder was chosen as the main control for the Micro so you don’t have to have the Telnet terminal or web browser “in focus” on the PC in order to control your radio with the Micro. You can do everything you need to with just the encoder even while the terminal or web page is out of focus. You only need to bring the terminal or browser “in focus” to use the keyboard keyer or use the controls on the web page.

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The encoder is used to change frequency, select the tuning digit, navigate the menu system, and edit text and numerical parameters. To change frequency, just turn the encoder. To change the tuning digit, just press and hold the encoder then turn it.
To open the menu system, quickly press and release the encoder (known as a “short-press”). Once the menu is open, turn the encoder to scroll the selection bar. Press the encoder to select an item on the menu or press and turn the encoder to the left to exit the menu.
These encoder functions can also be performed using the keyboard if you’ve connected your computer to the Micro with a Telnet terminal such as Tera Term or Putty. To change frequency, press the [Up] and [Down] cursor control keys. To change the frequency step, press the [Left] and [Right] cursor control keys. To open the menus just press the [Enter] key.
There are a host of shortcut keys and other keyboard function you can use in a terminal session. These are described in the Terminal Keyboard Controls section.
Other Features You Will Want to Know About
There are a few features you’ll want to access right away. They will be described here.
Menu Timeout By default the Micro’s menus (with the exception of the Radio and Practice menus) timeout and return to the Home page after 10 seconds. This helps keep you from getting lost in the menus. You may want to disable this while you’re learning the Micro’s menu structure. Disable it in the Config->Calibration->Menu Timeout menu item.
Radio CAT, Baud Rate, and CAT Polarity You need to tell the Micro which radio you will be using it with. This is done in the Config->CAT menu. If your radio uses serial CAT control do the following:
· Open the Config->Connection menu and select the baud rate your radio is set up to use. · Verify the CAT polarity strapping is correct on your Micro. If you ordered the external
DIP switch, set the DIP switches to match the polarity your radio uses. You can select Normal (TTL) levels (switches 1, 2, and 3 ON/Up), Inverted (RS232) levels (switches 4, 5, 6, and 7 ON/Up), or Icom CI-V (switches 1, 2, 3, and 8 ON/Up). Switches are numbered from the left. If you didn’t order the external DIP switch option you’ll need to open the Micro’s case and change the internal straps. I generally set the internal straps on assembled units to Inverted (RS232) unless you specify another setting. Strapping should be marked on the white label on the bottom. · Connect the appropriate CAT cable to the CAT I/O jack (center 3.5mm (1/8″) jack) on the top edge of the Micro.
NOTE: Even if you don’t plan on using serial CAT to connect to your radio the CAT the polarity jumpers must be set to one of the polarities shown on the bottom sticker in order to provide the proper pull-ups for the microprocessor’s input pins.

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WiFi Setup If you’ll be using the Micro with an IP based radio like the Flex, you’ll want to get the Micro connected to your WiFi network.
· Select the Flex radio protocol at Config->CAT->Flex · Set the address of your radio in the Config->Connection->IP Adrs menu. Your radio’s IP
address can be found in SmartSDR on the Settings…->Radio Setup->Network tab. · Set the IP port # for your radio in the Config->Connection->IP Port menu. The default IP
port for the Flex is 4992. · Open the Config->WiFi menu and enter your router’s SSID and password then select
Connect WiFi. After about 5 seconds you should be connected to your radio. · You can connect to other radios or programs (like Thetis) that support IP CAT control.
Just enter the correct IP address and IP port # in the Config->Connection menu.

Multi-Function Buttons
The terminal’s FKeys and the Micro’s MFBs are initialized with the settings found in the Terminal Keyboard Controls and Multi-Function Buttons sections. You can modify these settings in the Quick Key->Configure menu.
Each MFB supports two functions. These are accessed using a short-press (< 1 second) for the first function and a long-press (> 1 second) for the second function.
With the default settings applied to the MFBs, the Micro can be used in standalone mode out of the box as shown in the table below. (The buttons are listed as they are laid out on the Micro.) You will need to open a terminal session or web browser to change the MFB functions (long-press MFB1).

Button MFB3

Short-press Function Zero the digits below the Tuning Digit

Long-Press Function Toggle the Tx Interlock

MFB2 MFB1

S-meter report Report see note below

Open Previous Frequency list Help (same as F1 on terminal keyboard) Plays the Full Report when on the Home page and the report is unmuted. Shortpress MFB1 to cancel.

NOTE: The Report MFB functions as follows:

· If a Report Type has been selected and the report is Muted, pressing Report will temporarily unmute the report and output the short report. The report stays unmuted until you press the Report MFB again, or mute it by long-pressing the encoder.
· If the report is Unmuted pressing the Report MFB just outputs the short report.

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Display Options
The primary method of interacting with the Micro is with the encoder and three multi-function buttons (MFBs). To `see’ what you’re changing with these controls you need to connect the Micro to a terminal program or a web browser to display the various screens the Micro generates.
I use Putty and Tera Term for Windows for the Telnet terminal. Putty is available for Linux and Mac. For iOS and Android, use Google to find one that works for you. The Micro contains a web server so most browsers can connect to it. When using the Telnet terminal you’ll want to set the baud rate to at least 115.2k.
Instructions for connecting to the Micro to a Telnet terminal program can be found in Appendix D and E. Once you’re connected, you will be presented with a title page. Press any key to open the Home page.
When using a web browser, connect your Micro to your network using WiFi then enter the Micro’s IP address in the browser’s address bar. You may need to preface it with HTTP:// if your browser tries to find a secure address (HTTPS://). The web server in the Micro does not use encryption.
Standalone Configurations
Most Micro users (especially Flex users) will probably just want to use the Micro as a remote tuning knob for their radio with no display. While the Micro can do much more than this, it will be perfectly happy to serve in this roll. But there’s no reason you can’t set the multi-function buttons (MFBs) to add additional functionality to your remote knob.
I’ve put together a few configuration examples to get you started. These should give you a feel for what’s available. You’ll need to use a terminal program to map Function Button Options to the three MFBs on the Micro. You can map three short-press functions and two long-press functions. Explore the Micro’s options and come up with settings that work for you. Let me know what combinations you find most useful and I’ll add them here.
FKey and MFB configurations are stored in the Radio Profile. There’s no reason you can’t have several profiles set up for the same radio with different FKey and MFB settings for each profile.
CW Speedster For CW operators that just want their Micro to be a memory keyer. Edit each transmit message for your needs then assign them to the MFBs
· Set MFB1 short-press to Speed · Set MFB2 short-press to RIT (if your radio supports it) · Set MFB3 short-press to TxMsg2 to send buffer #2 · Set MFB1 long-press to Help · Set MFB2 long-press to TxMsg3 to send buffer #3 · Set MFB3 long-press to TxMsg4 to send buffer #4

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FT Deluxe For Yaesu FT owners that hate digging into the menu system to find controls they use all the time:
· Set MFB1 short-press to Tx Power · Set MFB2 short-press to Pan Level (adjusts panadapter gain) · Set MFB3 short-press to External Tuner (if you use an external tuner) · Set MFB2 long-press to Swap A/B to swap the Micro’s A/B VFOs · Set MFB3 long-press to RX M/S to toggle control to the Main or Sub receiver
PCR1000 Deluxe For Icom PCR-1000 owners that just want a basic controller for their blank faced radio:
· Set MFB1 short-press to Volume · Set MFB2 short-press to Squelch · Set MFB3 short-press to NR (Noise Reduction) · Set MFB3 long-press to toggle Tx Enable this is the power control on the radio
Flex-ible Options Here are a couple of options for Flex users. You can connect two Micros to your Flex at the same time and have one set up for Flex Deluxe 1 and one setup for Flex Deluxe 2 on one slice. Or have one Micro setup to control Slice A and one to control Slice B. If you have a radio with 8 slices you could have a Micro connected to each slice (at least in theory I don’t have 6600 or 6700 so I’ve never tried it!) You can choose from any of the available function options for the Flex radio. Experiment with your options and see what works best for you.
Flex Deluxe 1 · Set MFB1 short-press to Volume · Set MFB2 short-press to ACG-T · Set MFB3 short-press to Gain (RF) · Set MFB2 long-press to ATU if you have an internal tuner · Set MFB3 long-press to xTune if you have an external tuner
Flex Deluxe 2 · Set MFB1 short-press to NR Level (Noise Reduction) · Set MFB2 short-press to ANF/APF (Automatic Notch Filter for SSB, Automatic Peaking Filter
for CW) · Set MFB3 short-press to AGC-T, AGC Threshold · Set MFB2 long-press to NB, Noise Blanker · Set MFB3 long-press to Gain to control the RF gain
Power Up Options You can set any function option as the Power Up option. When Power Up is set the Micro goes directly to that mode when you apply power. For instance, if you select Volume as the power up mode, the Micro will boot with the volume setting of your radio in the value editor. Just turn the encoder to change your radio’s volume
You should also set the same setting in one of the MFB short-press events.

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Home Page Telnet Terminal
When connected with a terminal program, the Home page is the base operating location for the Micro. Think of it as the radio control panel. Here, turning the encoder changes the radio’s frequency by the selected frequency step (i.e. the highlighted digits in the frequency display). To change the frequency step, press and hold the encoder then turn it. One highlighted digit means that the encoder changes that digit. Two highlighted digits means that the encoder tunes ½ of the left digit. For example, if the 1 KHz and 100 Hz digits are highlighted the tuning step is 500 Hz.
If your radio supports reading the S-meter over CAT an S-meter graph will be displayed on the second line of the Home page. In this example the S-meter is reading 10dB over S9. The S-meter is not supported in the browser.
To change other parameters on the radio or in the Micro configuration, press the encoder or the [Enter] key to open the Micro’s menu system. It will begin at the Main menu. You can also press and hold the Ctrl key then press the first letter if any of the menus in the Main menu to jump directly to that menu.
NOTE: The Micro will reboot when the terminal connection is shut down. If you want WiFi active in standalone mode (no terminal connected) enable Auto Connect in the WiFi menu.
The terminal displays will be used throughout this manual. The browser displays are similar and mostly have the same functions.
Home Page Web Browser
As of v1.02.00 the Micro includes a built-in web server that is described in Appendix F. The Home page on the server has more controls and detail than the Home page on the terminal program. These controls give you instant access to many of the Micro’s and radio’s features.
To use the browser interface, first connect your Micro to your network with WiFi. Next, enter your Micro’s IP address in your browser’s address bar. The Micro’s IP address can be found on the WiFi menu or in the Main->About… menu.
The current version of the web server is fully functional and works just like the terminal program, but it has one limitation: There is no support for menu hotkeys.

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Common Controls

Terminal Keyboard Controls

When the Home page is displayed you can use the Micro as a keyboard keyer if it is enabled. Just start typing characters on the keyboard and press [Enter] to send them. You can create another string of characters as the Micro sends the current string. Enable the transmitter interlock (press [Home] to toggle) if you want to transmit over the air, or disable it to use the Micro for code practice.

NOTE: In order to use the keyboard keyer feature, or control the Micro using the terminal keyboard, the terminal program must be in focus on your PC (i.e. it must be the active window). You can control the Micro using the encoder and MFBs while the terminal is not in focus on your PC.

Terminal Key Functions

The following functions are only available on the terminal interface.

Key

Page

Function

Enter

All

Home page: opens the Menu system, other pages: execute the selected item. Pressing the encoder does the same.

All

Home page: deletes the Tx message being sent. Menus: Exits the current

Esc

menu and returns to the Home page. Editors: Returns to the calling menu or

to the Home page.

Home

Increments frequency by the tuning digit

Up Arrow

Moves up to the next menu item

Text Editor Increments the current character

Value Editor Increments the current value by 1

Home

Decrements frequency by the tuning digit

Down Arrow

Moves down to the next menu item

Text Editor Decrements the current character

Value Editor Decrements the current value by 1

Home

Increments the tuning digit

Left Arrow

Return to the previous menu

Text Editor Move to the previous character

Value Editor Increments the current value by 1

Home

Decrements the tuning digit

Right Arrow

Move to the sub menu if there is one same as pressing [Enter]

Text Editor Move to the next character

Value Editor Decrements the current value by 1

All

Opens the Help page for the selected item

F2-F7

Home

Executes the function programmed for these keys. See the Quick Key Configuration topic.

Home

Sends the #1 Tx message this buffer always holds the last message buffer sent

Home

Sends the #2 Tx message

F10

Home

Sends your call sign (if it is set in the Keyer menu)

F11

Home

Sends and increments the Contact Serial Number

F12

Home

Sends the Contest Exchange (if it is set in the Keyer menu)

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Key Shift+F3 to Shift+F10 Insert Delete Home End
Page Up
Page Down

Page Home
Home Home Home Home Home Load/Save/ Rename Memory Home Load/Save/ Rename Memory

Function Sends Tx message buffers #3 to #10
Pause the Tx message if active Stop and delete the Tx message Toggle Tx Enable (transmit interlock) Zero the digits below the tuning digit Direct Frequency Entry Move to the previous page of memories
Toggle Key (in CW or CW-R mode) or PTT (in all other modes) Move to the next page of memories

Terminal Shortcut Keys

Many menus and features can be accessed directly from the Home page by using control keys when operating the Micro with a terminal program connected. To access these items, press and hold the Ctrl key then press the designated key. Most of the keys are mapped to the first character of the function they control so they’re easy to remember. The exceptions are Ctrl+a, Ctrl+o, and Ctrl+u. Shortcut keys are not available in the browser interface.

Ctrl+Key a b c d e f g i k l m o p q r s t u v w z

Function Swaps VFO-A and VFO-B Opens the Band menu Opens the Configuration menu Opens the Direct Frequency Entry window Opens the Edit Tx Message menu Opens the Frequency menu Plays the S-Meter Report if the Report is unmuted Plays the Frequency, mode, tuning resolution, and transmit interlock Report Opens the Keyer menu Opens the Load from Memory menu Opens the Main menu (same as [Enter]) Opens the Mode menu Opens the Previous Frequency/Mode menu Opens the Quick Key menu Opens the Radio menu (if the selected radio supports it) Opens the Save to Memory menu Opens the Tx Message menu Opens the Keyer Speed window Opens the VFO menu Opens the WiFi menu Zero’s the digits below the tuning digit

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HINT: You can use the control keys above and the menu hotkeys to quickly navigate to menu items. For example, pressing [Ctrl + k] [a] opens the Keyer Speed window. Pressing [Ctrl + d] [c] sets the radio’s mode to LSB. Once you are familiar with the Micro’s menu structure you’ll be able to easily manage the Micro and your radio from your keyboard.
Multi-Function Buttons
The three multi-function buttons (MFBs) to the left of the encoder have different functions depending on the Micro’s operating mode. They have programmable functions in the Home page and preset functions when a menu, text editor, or value editor is being displayed. Programmable functions can be set in the Quick Key Configuration menu.
Button Short-Press and Long-Press
A button `short-press’ is a button press and release within 1.5 seconds. A button `long-press’ is a button press and release after 1.5 seconds but before 5 seconds.
MFB Audio Feedback When you press an MFB the buzzer will sound beeps correlating to the MFB #. One beep for MFB1, two for MFB2, and 3 for MFB3. Release the button when you hear the beep(s). If you hold the button past the short-press time period an additional longer beep will be sounded to indicate a long-press function will be executed on release. If you continue to hold the button for longer than 5 seconds another longer beep will be sounded to inform you that no function will be executed.

Btn MFB3

Home-Short Press Default: Zero Digits below Tuning Digi

Home-Long Press Default: Toggle
Tx Interlock

Menu-Short Press Play the current Menu Item if the Report is unmuted

MFB2 MFB1

Default: Report the S-meter value
if reporting is unmuted.
Default: Play the short report if
reporting is unmuted

Default: Open the Previous Frequency
menu
Default: Opens the Help window. Plays the Full Report in the
Home page if reporting is unmuted

Return to the previous menu*
Return to the previous menu

NOTE: Buttons in the table above are listed the way they are laid out on the Micro with MFB3 on top.

* Toggles Tx Interlock when in the Radio menu

Menu-Long Press Play the current Menu Item if the Report is unmuted
Return to the Home page
Return to the Home page

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Standalone Menu Block
When the Micro is used without a display (no terminal or browser connected) access to the menu system is blocked unless a Report is unmuted and one of the menu report options are active. This prevents the operator from inadvertently changing menu settings without knowing it.
Pressing the encoder to open the main menu or a pressing an MFB that opens a menu will cause an error beep (the LED flashes and the buzzer sounds 8 fast Dits) to indicate the blockage. This occurs after the encoder or button is released.
To override the block and access the menu toggle the Code Report mute off by long-pressing the encoder (>2 seconds). This allows you to navigate the menu with code. Once you are finished using the menu, long-press the encoder again to mute the Code Report.
A couple of notes about menu blocking:
· This block is also applied to any multi-function button (MFB) that has been programmed to open a menu.
· Many functions do not open a menu when called from the MFB but they will try to bring a menu up after you’ve set the parameter’s value. This will cause an error beep mentioned above even though the function succeeded because the menu is ignored and the program returns to the Home page. This is normal.
Menu System
The Micro uses a menu structure very similar to the one employed in CTR2-Mini. The menu system provides a convenient way to interact with the Micro using either the encoder or the terminal keyboard. All configuration settings and many radio settings are done using the menus.
Accessing the Menu System
Accessing the menu system can be done in several ways. The two main methods are to press and release the encoder or press the [Enter] key in the terminal program. You can also jump straight to one of the menus on the Main Menu from the Home page by pressing and holding the [Ctrl] key then pressing the first letter of the desired menu. For instance, to open the Keyer menu, press Ctrl+k. Press Ctrl+c for the Config menu, etc. A complete list of short-keys can be found in the Shortcut Keys section. The full menu structure can be found in Appendix G: Menu Structure.

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Menu Timeout A menu timeout option can be enabled in the Config->Calibrations->Menu Timeout menu. The timeout timer helps if you get lost in a menu or forget to go `Home’, especially if you’re running the Micro without a display. To return to the Home page from any location press and hold the encoder and turn it LEFT. The text and value editors always stay active until you close them. This allows you to open a parameter and leave it open.
Menu Navigation Once the menu is open use the encoder or [Up] and [Down] cursor keys on the keyboard to scroll the menu selection. Press the encoder or [Enter] to execute the selected item. You can also press the highlighted hotkey on the left of each entry to execute a menu item directly.
If these aren’t enough options, enable Keyer->Nav/Edit and you can use your paddles to key in the hotkey character to execute that item. With Reporting enabled you actually control the Micro (and your radio) with no display using just your paddles.
NOTE: To silence a running code report, quickly tap the Dah paddle or turn the encoder.
Some items will open a submenu. Others will open a text editor that allows you to edit a text field. Still others will open a value editor where you can change a value. Finally, some items just toggle the selected setting.
Text Editor When a parameter is text base (i.e. the radio profile name, tag line, message buffers, etc) a simple text editor will open where you can edit that parameter. There are several ways to edit the text string. The easiest of course is with the terminal keyboard or browser interface. Just type in the new text or use the cursor left or right keys to move the character selection left or right. You can also use the encoder to edit characters. Press and turn the encoder to move the selection cursor to the left or right. Release the encoder then turn it to change the selected character. You can even use your paddles to enter text. To do this you must enable the Edit mode in the Keyer->Nav/Edit menu. There are special rules for using your paddle. They can be found here.
Moving to the left of the first character with the left cursor control key or the encoder in the terminal interface will exit the text editor without making any changes. This is the same as pressing the [Esc] key.
In the browser interface, edit text as you would in any web site. Your phone and tablet will display a virtual keyboard when you click on the text box. The edit cursor used in the terminal interface is not shown in the browser interface but turning the encoder will change the first letter of the text.
NOTE: Frequencies are entered in MHz. Enter only one period! When editing a frequency the available digits are limited to 0 to 9, period, and Space. Inserting [Space] for a digit truncates the frequency at that digit. If you don’t insert a [Space] all digits past the selected digit will be returned intact. This allows you to change just one or two digits in the frequency.
NOTE: When editing a frequency enter only one period to denote the MHz location.

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Value Editor
When a parameter is numerical (i.e. keyer speed, sidetone frequency, etc.) the value editor will be displayed. The value in the editor is changed by either rotating the encoder or by using the cursor control keys on the terminal keyboard. You can also use your paddles to increment or decrement the value. To do this you have to enable the Edit mode in the Keyer->Nav/Edit menu. Like the text editor, there are special rules for using your paddle. They can be found here.
NOTE: The value editor in the terminal interface does not accept numerical keys from your keyboard. It was designed to use the encoder to change values.
NOTE: When using the browser interface edit the number as normal. Phone and tablet browsers will display a virtual keyboard when you click on the text box. You can turn the encoder to change the value displayed.
Menu Code Reports
When using the Code Report feature, the first five letters of the menu title are sent followed by a comma (,) when you first open a menu. This is followed by the hotkey then 1 to 4 characters, or all of the select menu item’s description. After the initial report only the hotkey and menu item is reported when you scroll the menu. This allows you to quickly identify which menu and menu item is selected when not using a display. Once you get use to the menus and their hotkeys you’ll be able to navigate quickly by listening for just the hotkey.
Context Sensitive Help
Context sensitive help is available for every menu item. Just select an item and press [F1]. Press [Esc] or turn the encoder to close the help window. By default, Help is assigned to long-press MFB1.
Main Menu
The Main Menu is the base menu. From here you can access the other menus that control the Micro.
As discussed in Menu Navigation there are various ways to access the items on menus. If you’re using a terminal program to display the menu you’ll need to have that program in focus on your PC for key strokes to be recognized by the Micro. This is also true if you want to use the keyboard keyer function.
You can access these menus directly from the Home page by using the Short cut keys. Short cut keys are not available on the web browser interface.
Each menu is described in this manual. You can jump to that section by clicking one of the names below.
Quick Keys Frequency VFO Band Mode Tx Msg Edit Tx Msg Keyer Config Radio

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Quick Key Menu
This menu allows you to access the functions assigned to the terminal’s FKeys (F2 through F7) and the MFB short and long press functions. MFBs starting with `s’ are short-press functions. Those starting with `l’ are long-press functions.
Power Up Function
In addition, you can define a function that will run when you first power up the Micro. For instance you can set Power Up to Radio and the Micro will start in the Radio menu when booted up. With Code Reporting enabled you can run the Micro without a terminal display.
Selecting Configure opens the Quick Key Configuration Menu where you can change these settings.

Quick Key Configuration Menu
This menu is accessed from the Quick Key Menu above by selecting the Configure item.
To change a function assigned to one of these controls simply select it by pressing its hotkey or by scrolling to it and pressing the encoder or [Enter]. This will open one of the Function Options Menus.
NOTE: This menu looks like the Quick Key menu above. The only difference is there is no p Configure option.

Function Buttons Option Menus
There are two menus that contain functions available to the FKeys, MFBs, and Power Up. PG1 Function Option Menu contains functions that are available regardless of the radio you are controlling.
Press the F1 key or the MFB assigned to Help to open a help window describing the selected option.
The following functions are available when the report is unmuted.
· Report announces the current frequency, mode, tuning resolution, transmit interlock status, and S-meter.

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· S-Mtr announces the current s-meter reading. It can also be used to cancel a running report. · Help when pressed in the Home page plays the Full Report, in essence, it report the contents of
the Home page. When Help is pressed in a menu it displays (or announces) the help screen for that menu item.
Report features are useful for blind or limited sight operators that have difficulty reading their radio’s displays or when operating the Micro in standalone mode with CTR2-Voice.
To navigate to Pg2 Function Option menu, press the Y hotkey or select More >. To exit this page without making changes, press Z, select Exit >, or just press MFB1. This will return you to the Quick Key Configuration Menu. Pressing [Esc] will return you to the Home page.
NOTE: Not all functions make sense for Power Up. For example, a function that toggles a parameter on and off like TxEnable, PTT, Key, etc. shouldn’t be used.
The left column of the Pg2 Function Option menu contains radio specific functions that vary depending on the selected radio and shortcuts to various menus. Hotkeys Y and Z, and [Esc] provide the same functionality as they do on Page 1.
The right column from hotkey q to x are used to set an FKey or MFB to open one of these menus.
Frequency Menu
The Frequency Menu provides access to the frequency options available on the Micro. These include direct frequency entry, zeroing the digits below the tuning digit, opening the Previous Freq/Mode menu, opening the RIT value editor, toggling the favorite frequency database, loading and saving VFO-A and VFO-B from/to memory, renaming or erasing a memory slot.
Many functions can be accessed using Ctrl+ keys. These are shown on the menu in the brackets [^_] This menu can be accessed by pressing Ctrl+f in the Home page and it can be assigned to an FKey or MFB in the Quick Key Function Option menu using the Freq option.

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Direct Frequency Entry
Selecting his item allows you to enter a frequency directly from the keyboard or by using the encoder to set each digit.
This option can be assigned to an FKey or MFB in the Quick Key Function Option menu using the Direct option. Ctrl+d is the shortcut for this function.
Zero Low Digits
Selecting this item zeros the digits below the tuning digit. This is helpful when you want to set an exact frequency.
This option can be assigned to an FKey or MFB in the Quick Key Function Option menu using the Zero option. Ctrl+z is the shortcut for this function.
Previous Frequency/Mode Menu
Selecting this option opens the Previous Freq/Mode menu. This menu displays the current frequency plus the last 25 frequencies you have visited. If you remain on a frequency for longer than 15 seconds it will be added to this list. This list is maintained through power cycles.
Scrolling to one of the entries on this list temporarily sets your radio to that frequency and mode. To stay on that frequency and mode press the encoder or [Enter]. Pressing MFB1 or [Esc] returns you to the original frequency and mode (as does hotkey A).
Pressing the hotkey for an entry on the list instantly takes you to that frequency and mode.
This menu can be assigned to an FKey or MFB in the Quick Key Function Option menu using the Prev option. Ctrl+p is the shortcut for this menu.
Lock Mode
You can lock one or more entries to keep them on the top of the list so they don’t scroll off. In effect, this becomes your quick list of favorite frequencies. To toggle the lock on an entry, press the MFB2 button on the Micro or the [Right] cursor control key on the terminal keyboard.
Locked frequencies have an asterisk next to the mode.

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RIT
Selecting this item allows you to set the Receiver Increment Tuning (RIT) offset on your radio. To return to 0 Hz offset change the frequency of the radio or long-press the encoder when setting this value.
RIT xxxx will be displayed to the right of the frequency in the Home page when RIT is enabled.
NOTE: If your radio’s protocol doesn’t support RIT this option will not be visible.
This option can be assigned to an FKey or MFB in the Quick Key Function Option menu using the RIT option.
Database
This option allows you to choose between the selected Radio profile’s favorite frequency database and the Shared database.
The shared database is available to all radio profiles.
Load from Memory Menu
This option opens the favorite frequency list for the current active VFO. The list will contain entries from the selected database. You can select either the selected profile’s database or the shared database by changing the Database option.
Up to 100 frequencies can be saved to this list for each VFO.
Each memory slot holds the name of that memory, frequency, and mode. The memory name is displayed under the frequency on the Home page when you are tuned to that frequency.
Use the [Up] and [Down] arrow keys or the encoder to scroll to a memory slot. The [PgUp] and [PgDown] keys move to the next page. Press the encoder or [Enter] to load the selected memory into the active VFO and return to the Home page.
Both the A and B memory frequencies are displayed at the bottom of the list. The active VFO is highlighted. Press MFB2, the [Right] arrow key, or press and hold the encoder then turn it to the RIGHT to switch the active VFO.
This menu can be assigned to an FKey or MFB in the Quick Key Function Option menu using the M->V option. Ctrl+l is the shortcut for this function.

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Save to Memory Menu
This option allows you to save the active VFO’s frequency and mode to the favorite frequency list in the selected Database. Navigation is the same as described above.
The frequencies in the active VFO’s list are displayed. To change the active VFO press MFB2, the [Right] arrow key, or press and hold the encoder then turn it to the RIGHT.
Once you save the frequency a text editor will open where you can edit or add a label for this memory slot.
This menu can be assigned to an FKey or MFB in the Quick Key Function Option menu using the V->M option. Ctrl+s is the shortcut for this function.
Rename/Erase Memory Menu
This option allows you to rename or erase a memory slot in the selected Database. The frequencies in the active VFO’s list are displayed. To change the active VFO press the [Right] cursor key or press and hold the encoder then turn it to the RIGHT.
To rename a memory slot just select it and press [Enter] or the encoder to edit it.
To erase (delete) a memory slot open it in the text editor then enter a [Space] character as the first character in the name. Erasing it will clear the name, frequency, and mode.
Report Frequency/Mode
This option reports the current VFO, frequency, mode, tuning resolution, transmit interlock state, and s-meter value when using the selected Report , This function can be programmed to one of the MFB functions.

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VFO Menu
The VFO Mode and Options Menu gives you access to the five VFO modes and several options the Micro supports.
This menu can be accessed by pressing Ctrl+v in the Home page and it can be assigned to an FKey or MFB in the Quick Key Function Option menu using the VFO option.
VFO-A/VFO-B
The Micro supports two VFOs. They will be independent of the VFOs on the radio if the Ctrl VFO option is set to A. Select Ctrl VFO = A&B if you want the Micro’s VFO-B to control the B VFO on the radio.
Memory Tuning
This mode allows you to tune through the memories saved on the Micro using the encoder or cursor [Up] and [Down] keys. This is great if you’re looking for activity on a certain set of frequencies.
NOTE: The active VFO will be used as the memory source for Memory Tuning.
Range Tuning
This mode allows you to define a low and high frequency range tuning band. This is handy if you’re in a contest where you need to stay within a certain bandwidth, or if you’re tuning linear transponders on a satellite. To set the range, program a memory slot with the low frequency in VFO-A and the high frequency in VFO-B. Once you’d done this, simply select that memory location and enter Range Tuning mode.
The tuning range defaults to the selected band when a low/high range hasn’t been defined.
The following Options are available in the VFO menu:
Ctrl VFO
The Micro normally controls only the A VFO on your radio. This allows you to use the Micro’s two VFOs on radios that only have one, such as the Flex or dual-receiver radios like the FTdx101. Select VFO-A or VFO-B in the Micro’s VFO menu to switch which Micro VFO controls the radio’s A VFO.
You can override this by setting Ctrl VFO=A&B instead of Ctrl VFO=A. In this mode, selecting VFO-B on the Micro switches the radio to its B VFO. The Micro’s VFO-A still controls the radio’s A VFO. This is useful when operating your radio in split mode. The Micro automatically returns the radio to its A VFO when you return to Ctrl VFO=A.

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This option can be assigned to an FKey or MFB in the Quick Key Function Option menu using the RVFO option.
NOTE: Not all radio protocols support controlling the A and B VFOs on the radio and some don’t switch the active VFO to the main display. The A&B mode isn’t available on dual-receiver radios. These receivers are controlled by selecting the Main or Sub receiver in the Radio menu, which can also be assigned to an FKey or MFB. You can use the Micro’s VFO-A and B on dual-receiver radios and Flex slices.
NOTE: The Icom and Xiegu CAT protocols don’t steer frequency commands to a specific VFO on the radio (like the Kenwood FA and FB commands do). Therefore, on these radios when the Micro is powered up it will force the radio’s VFO to the last radio VFO that was selected on the Micro before power down. This may override the VFO you may have selected manually.
VFO Lock
This option toggles the frequency/mode lock on the Micro. When locked, you can’t change either with the encoder or keyboard, but you CAN change them on the radio.
This option can be assigned to an FKey or MFB in the Quick Key Function Option menu using the Lock option.
Start Scan
Selecting this option starts scanning at the current frequency. The frequency increment is determined by the tuning digit. You can change the tuning digit during scan by pressing and turning the encoder. You can also change the direction of the scan by just turning the encoder to the left or right during scan. Clicking the encoder or any key on the terminal keyboard stops the scan.
This option can be assigned to an FKey or MFB in the Quick Key Function Option menu using the Scan option.
A to B
This option copies the Micro’s VFO-A frequency and mode to VFO-B. To reverse this action, select VFO-B then reload its original frequency from the Frequency->Previous Freq/Mode menu.
B to A
This option copies the Micro’s VFO-B frequency and mode to VFO-A. If VFO-B is open (i.e. not set), VFO-A frequency and mode will be copied to VFO-B. To reverse this action, select VFO-A then reload its original frequency from the Frequency->Previous Freq/Mode menu.
Swap A/B
This option switches the active VFO.

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This option can be assigned to an FKey or MFB in the Quick Key Function Option menu using the SwapAB option. Ctrl+a is the shortcut for this function.
Band Menu
The Band Menu allows you to instantly jump to a band. The last frequency and mode on the previous band are saved in the band stacking register and will be restored when you return to that band.
This menu can be accessed by pressing Ctrl+b in the Home page and it can be assigned to an FKey or MFB in the Quick Key Function Option menu using the Band option.

Mode Menu
The Mode Menu allows you to select a mode for your radio.
NOTE: DigL and DigH modes are specific to the selected radio and may not map in the Micro correctly.
This menu can be accessed by pressing Ctrl+o in the Home page and it can be assigned to an FKey or MFB in the Quick Key Function Option menu using the Mode option.
The Other mode is displayed when you select an advanced mode on the radio that is not supported in the Micro.
There are also two special modes in this menu.
Tx Enable (Transmitter Interlock)
This option controls the transmitter interlock. When Tx Enable is OFF the PTT and KEY outputs on the Micro are disabled. This prevents inadvertent keying of your radio and allows you to use the Micro for code practice.
When using the Micro as a beacon controller, disabling Tx Enable (i.e. Tx Off) pauses the beacon. Re-enabling Tx Enable will cause the beacon to restart.
This option can be assigned to an FKey or MFB in the Quick Key Function Option menu using the TxEnable option.

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External Tuner Mode

When you enter External Tuner mode the Micro saves the current power and mode on your radio then resets them to the power and mode you have chosen to tune your external tuner. Key the radio using the [Pg Down] key on the keyboard or by shortpressing MFB3 to toggle the Key latch. When you exit this mode the Micro restores your radio back to the original settings.

This option can be assigned to an FKey or MFB in the Quick Key Function Option menu using the xTuner option.

The following buttons and keys can be used to control External Tuner mode:

Key or MFB MFB3 or [Pg Down] MFB2 or [Home]

Function Latching output – Keys the radio on the first press, unkeys it on the second press. You can also touch the Dit paddle to unlatch the output. If CW is selected, KEY Out is active. If AM or FMn is selected, PTT Out is active. If any other mode is selected, mode switches to CW before key up. Toggles the transmit interlock

MFB1 or [Esc] Dit Paddle

Restores normal operation and returns to the Home page
Non-latching It acts like a straight key in that it keys KEY Out to the radio while held and unkeys when released. It also resets the Key or PTT latched output from MFB3 or [Pg Down] if it is active.

Key or MFB Up/Down Cursor Control keys Left/Right Cursor Control keys

Function Increments or decrements the Tx Output Power
Decrement or increment the radio’s mode

NOTE: Your radio must support Tx power control via CAT for the power setting to work. If it doesn’t, you’ll need to manually adjust the power on your radio for your external tuner.

Tx Message Menu
The Tx Msg Menu allows you to select one of fourteen 75 character messages. Messages start transmitting immediately after selection. From the Home page you can easily send any message by pressing Ctrl+t to open this menu then press the hotkey of the message you want to send.
Only buffers that contain text will be displayed.
The first buffer always holds the last message sent. This allows you to repeat a contest exchange without incrementing the contact serial number.
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You can embed CW prosigns in the buffer text. The information represented by the prosign will be sent when the keyer encounters the prosign.
This menu can be accessed by pressing Ctrl+t in the Home page and it can be assigned to an FKey or MFB in the Quick Key Function Option menu using the Tx Msg option.
NOTE: The transmit interlock must be enabled for messages to be transmitted by the radio.

Edit Tx Message Menu
The Edit Tx Message Menu allows you to edit each message buffer.
NOTE: The first message is the repeat buffer and always holds the last message sent. You can edit it here, but it will be overwritten by the next message.
This menu can be accessed by pressing Ctrl+e in the Home page and it can be assigned to an FKey or MFB in the Quick Key Function Option menu using the EdtMsg option.
Message Prosigns
Prosigns follow the K1EL keyer 3.0 standard and can be embedded in each message buffer. There are four special prosigns that send your call [^], Contact Serial Number [#], Contest Exchange [%], and toggle sending speed by 150% [*]. Your call, contact SN, and exchange can be edited in the Keyer menu. A “long-DAH” can be sent with the underscore character [_]. The table below contains the available prosigns and their Morse equivalents.

Prosign Morse Prosign Morse Prosign Morse Prosign Morse

{Ur Call}

[

{Serial#}

BT ( : ] KN

”

% {Exchange} –

{Speed} + < AR

;

_ Long DAH >

)

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Keyer Menu
The Keyer Menu gives you access to the various keyer settings and modes.
This menu can be accessed by pressing Ctrl+k in the Home page.
Speed
Adjust the keyer’s speed here. The spacing will match the speed as it’s changed. On most radios, adjusting the Micro’s keyer speed will change the speed on the radio’s keyer too.
This option can be assigned to an FKey or MFB in the Quick Key Function Option menu using the Speed option. Ctrl+u is the shortcut for this option.
Spacing
Use this control to adjust the Farnsworth spacing (distance in wpm) between characters when sending a Tx message buffer. You control the character spacing when sending with the paddles.
KeySTone (Key Out Sidetone)
This option determines the sidetone source when keying the radio. When set to Micro the buzzer on the Micro is active when the radio is transmitting. Select the Radio option to mute the Micro’s buzzer if you want to use the radio’s sidetone.
NOTE: The Micro’s buzzer is used for all code reports and when keying the Micro with the transmitter interlock disabled (i.e. when not keying the radio).
NOTE: When keying the Flex radio using the CW= Net option (network keying) set the Key Sidetone to Micro as the radio will not generate sidetone when keyed over the network.
Sidetone (Frequency)
This option allows you to adjust the frequency of the Micro’s sidetone buzzer. The buzzer used in the Micro doesn’t have a linear frequency response so you’ll probably want to adjust the frequency to find a pitch that sounds the best for you.
NOTE: The sidetone range is 120 Hz to 1200 Hz. Changing the frequency to 0 Hz mutes the sidetone for both keying and the Code Report.
NOTE: You can also adjust the volume control on the Micro down to mute the sidetone.

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Type
The (Keyer) Type menu allows you to select the keyer type you prefer.
None
This option turns off the paddle input.
Straight
Use this option if you want to plug a straight key into the Micro. Wire it to the TIP of the 3.5mm (1/8″) stereo plug.
Passthru
This is a special mode that forwards the Dit and Dah paddle inputs directly to the Key/PTT output jack on the Micro. The Dit paddle controls the Key output and the Dah paddle controls the PTT output. This allows you to connect the Key/PTT jack on the Micro to either your radio’s paddle input jack, or to an external keyer if you prefer to use them. This isn’t as important on the Micro as it was with the Mini because the Mini can connect to many different radios through an RS232 switch but I included it in case it’s something useful.
Iambic A and Iambic B
These modes interleave Dit and Dah when both paddles are pressed at the same time. You need to use an Iambic (dual paddle) key to use these modes. The modes are similar with just a subtle difference on how the keyer reacts to the paddle timing at the end of a character. I prefer the A mode but if you’re use to the B mode, use it.
NOTE: Iambic-B didn’t work properly in firmware versions before v1.06.02. If you use Iambic-B mode you should update your firmware to the latest version.
Ultimatic
This mode is similar to Iambic in that it requires a dual-paddle key. The only difference is that the keyer repeats the last element pressed. For example if you press Dit first, then Dah, and hold them closed the keyer sends one Dit then a stream of Dahs. A dual-paddle bug if you will. Some operators prefer this mode so I’ve included it.
Bug
This mode simulates the old bug keys where only the Dit input repeats. Pressing the Dah paddle is the same as using a straight key.

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Paddles (Reverse)
This option allows you to swap the Dit and Dah wiring on your paddles. This is handy if you have more than one set of paddles with different wiring.
Pdl PTT (Use Paddle In Jack for PTT)
Enabling this option allows you to use the Paddle In jack on the Micro as a remote PTT switch input when the radio is in a voice mode (LSB, USB, AM, FM, DigH, DigL).
The Dit paddle input controls Latching PTT. Press once to key PTT, press again to unkey PTT. The Dah paddle input controls Momentary PTT. Press and hold to key PTT, release to unkey PTT. This will also unkey PTT if the latching PTT is enabled.
You can swap the functions of the paddles by setting Paddles= REV.
When this mode is disabled the Paddle In jack controls the keyer in every mode.
NOTE: When Pdl PTT is enabled the Micro’s PTT Output is only active when the radio is in a voice mode, one of the paddle inputs is active, and the Tx Interlock is enabled. When the Tx Interlock is disabled the paddles can be used for code practice in any mode.
Kybd Kyr (Keyboard Keyer)
This option allows you to enable or disable the keyboard keyer function. When enabled and your radio is in CW mode you can use your keyboard to transmit CW.
When enabled when using the Telnet terminal interface go to the Home page and simply key in the text you want to transmit. The text you entered will be displayed at the bottom of the page. Press the [Enter] key to send it. The transmitting text will be displayed at the bottom of the page. Press [Ins] to pause transmission or [Del] to stop.
When using the browser (web) interface you need to select the Keyboard Keyer text box at the bottom of the page and enter text to transmit there. Press [Enter] to send the text. Once transmission starts the text you entered will be displayed in the title area of the keyer text box. Press the Pause or Stop buttons under the text box to control the transmission.
Once transmission starts you can add additional text add to what’s already being sent by just typing (in the terminal) or entering more text in the Keyboard Keyer text box on the browser.

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Beacon Mode
Beacon mode was added in v1.03.00. This mode allows you to use the Micro as a beacon controller. Use this menu to configure the beacon and enable or disable it.
When beacon mode is enabled its status will be displayed in the Tx Interlock status field. You can pause the beacon by toggling the Tx Interlock to Tx Off with the [Home] key on the terminal or by selecting it in the web interface. You can also program an MFB to control the Tx Interlock. Toggling it again will restart the beacon.
To quickly turn beacon mode off press the [Esc] key in the terminal or Stop Beacon in the web interface.
When the Micro is operating in standalone beacon mode (no terminal or browser connected) the LED will flash at ½ second intervals while the Micro is keying the radio.
You can monitor the status of the beacon on the Home page. The Tx Interlock will display << TX CW >> when the beacon is transmitting and Beacon Enab when it is not. The red bar across the middle of the page indicates whether the beacon is active or paused. The beacon’s CW speed is displayed directly below the bar along with a hint to press [Esc] to stop. The text being sent will be displayed at the bottom of the page.

NOTE: To mute the Micro’s sidetone either turn the volume down or select Key Sidetone= Radio in the Keyer menu.
Enable This option toggles the beacon on and off. Before you can enable it you must set the interval, frequency, and call. You’ll also want to include your transmitter’s Maidenhead grid coordinate for others monitoring your beacon. When you enable the beacon the radio’s mode will automatically be set to CW and the 1st Power Out level will be set. If you haven’t set the 1st Power Out level, or your radio doesn’t support CAT power control, the beacon will transmit at the power level set on the radio.
Interval This option sets the interval between transmissions in seconds.

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Frequency This option sets the frequency the beacon will transmit on. The frequency will default to the current frequency on the Micro the first time you configure the beacon. If you change the frequency of the radio while the beacon is paused it will reset the radio to this frequency before it transmits again.

NOTE: Enter frequency in MHz. If you enter the frequency to the Hz, the Hz digit will be rounded up due to floating point rounding errors example: 28.150001 will round up to 28.150002. It’s best to just enter frequency to the 10 Hz. NOTE: To set the beacon to the current frequency on the radio, edit this field and enter a single [Space] as the first character to delete the stored frequency.
Call (up to 12 characters) Enter the call sign you wish to use on your beacon in this field. It will default to the Call setting in the Keyer menu the first time you configure the beacon. You can add additional text to the call such as `v v v de’ if you want. NOTE: /B will be automatically appended to the call sign entered here.
Location (up to 24 characters) Enter your transmitter’s Maidenhead grid coordinate in this field. You can find you grid using many tools available on the internet. Most beacons use just the first four digits of the Maidenhead grid descriptor. You can find your Maidenhead here: https://www.karhukoti.com/Maidenhead-Grid-Square-Locator/
Additional Text (up to 70 characters) This field allows you to add addition text to your beacon’s message. It is added to the end of the Call and Location message.
Power Out The last four fields allow you to define four different power output settings on your radio. This helps the listener determine the receive signal strength at each power setting. When just the first power output is defined the Micro will send the entire beacon message and end with sending the power followed by “w” using the first power output setting. If two or more power levels are defined the Micro will send the beacon message at the first power level as described above. It will then wait one second then set the radio to the second power level and send that power level followed with a “w”. If the third and/or forth power levels are set the Micro changes the radio’s power level again then sends those power levels followed by “w”.

NOTE: You must set the power out settings in sequence (1, 2, 3, and then 4). The sequence resets after all four have been sent or the Micro finds the next power out setting set to 0 (off). NOTE: Your radio must support CAT power settings for the power level options to work.

After the power out sequence completes the beacon waits for the Interval time period and then starts the process over again.

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Navigation/Edit (Paddles)
The Navigation/Edit option allows you to select whether or not you want to use the paddles for menu navigation and/or for editing text or values. You might want to enable navigation, editing, or both if you are using the Micro for code practice. The Micro makes a great code practice buddy.
NOTE: Hotkeys are not available in the browser interface. They are only displayed and accessible from the paddles if the paddle Navigation mode is enabled.
OFF This is the default. In this mode the paddles will key the radio in both the menus and the text and value editors if the transmit interlock is enabled.
NAV ON When NAV is ON the paddles can be used to select menu items by keying in the hotkey for the desired menu item.
NOTE: The Micro’s keyer won’t key the radio in menu mode if this option is enabled.
EDIT ON When EDIT is ON the paddles can be used to enter text or values using the Paddle Input Rules.
NOTE: The Micro’s keyer won’t key the radio in the text or value editor if this option is enabled.
NAV & EDIT ON When NAV and EDIT are ON the paddles can be used for both navigation and edition. This makes a great way to practice code.
Paddle Input Rules When using your paddles to edit text or values the Keyer Type temporarily switches to Iambic B mode and the following rules apply. It switches back to the mode you had set when you exit the editor.
Text Input (direct frequency input, Tx message buffers, call sign, etc) · Send a character using the paddles it will overwrite the current character at that position and increment to next character · Send 8 Dits to backspace this deletes the current character and moves left to the previous character. If you backspace to the first character and send 8 Dits again you will exit the field without modifying it (same as pressing [Esc]). · Send 8 Dahs to move to the next character to the right. To insert a space send two 8 Dah sequences to move past the current character, leaving a space. · Capital letters cannot be added using the paddles · Press the encoder to accept the current field and exit

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· Characters starting at and past the current selection will be deleted · Start the string with a [Space] to delete the entire string
NOTE: When editing a frequency inserting a [Space] in the frequency truncates the frequency returned from the [Space] on. If you don’t enter a [Space] the entire frequency will be returned. This allows you to edit an individual digit.
Value Entry (numerical values for keyer speed, sidetone freq, etc) is slightly different. · Press the Dah key to increment the value. One Dah (`t’) increments by 1, two Dahs (`m’) increments by 2, up to five Dahs (`0′) to increment by 5. · Press the Dit key to decrement the value. One Dit (`e’) decrements by 1, two Dits (`I’) decrements by 2, up to 5 Dits (`5′) to decrement by 5. · Send 8 Dits or 8 Dahs to exit the value window. Values are saved as you change them.
Navigation (selecting menu items) · Key in the hotkey character to select and execute that entry · Key in 8 Dahs for Ok (same as entering the hotkey) · Key in 8 Dits for Esc
Practice Menu
Practice mode is not a full featured code practice system. It’s just a simple, easy to use way to practice Morse code. If you really want to find a full featured Morse trying system checkout Kurt Zoglmann’s site at https://morsecode.ninja
(Practice) MODE There are three practice modes. · Send Continuously · Send 1 Chr and Wait · Send Group and Wait
Send Continuously sends groups of characters based on the selected session without stopping. This mode is best when you are recording what you are copying. Run the session then check your copy against the Micro’s display.
Send 1 Chr and Wait sends a single random character then waits for you to enter it on the keyboard. This mode works well if you want to improve your decoding skills using a keyboard. This mode includes a character counter, a % of Good keystrokes, a % of Errors keystrokes, and an average of time from the end of the character until you press a key.

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It doesn’t matter which session you choose, this mode always sends a single random character.
Press [Enter] to pause and reset the counters or [Space] to repeat the last character.
Send Group and Wait sends the selected session group of characters and waits for you to enter that group on the keyboard. This mode works well for training you to decode the code in your head then enter that data into the computer, similar to what you would do in a contest. If you make a mistake the original text and what you entered will be displayed and another group will be sent.
Press [Enter] to pause and reset the counters or [Space] to repeat the last group.
NOTE: The Send and Wait modes are not available in the web server (browser interface) because the keyboard isn’t active in that mode.
Practice Sessions There are four practice sessions that help mix your code practice up.
Fixed length sends random five character groups from the selected character pool. Random length varies the number of characters sent in each group between 1 and 10 characters. Call Signs sends randomly generated callsigns using a combination of the letters in the character pool and number 0 to 9. Formats vary from a#aa to aa##aaa. Q-Signals sends real Q-signals in a random order.
Character Groups The Micro uses the Koch method, a proven method of learning Morse code. If you’ve never heard of this method there are many links in Google for it. These web resources explain its virtues (and some say vices). Basically, it involves learning the code at `full speed’, or at least 15 wpm, from day one. This helps overcome the tendency of new learners to `count the Dits and Dahs’. You start with the basic characters with one or two elements, e, t, m, etc. Once you’ve become 90% proficient in copying them, add more complex characters to the mix.
The Micro allows you to select from several groups of increasing complexity. You can also practice numbers or punctuation groups. The All Letters option creates a character pool using all of the letters. All Groups puts all of the letters, numbers, and punctuation in the pool. Selecting a group replaces the current characters in the character pool with the new group. You can also select Edit Pool and create your own group of characters to practice.
The selected group will be marked with `<—-SELECTED’ on the menu. If you edit the character pool the selected mark will move to the Edit Pool menu item. The selected group will be saved when you power down the Micro.

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Practice Session Continuous Mode When you select one of the practice modes a code practice session opens. To start the session, press the [Enter] or the encoder. To pause it and check your work, press [Enter] or the encoder again. To erase the current practice session and return to the Practice Menu press [Esc], MFB1, or MFB2.
This screen shot is of a fixed length session using Group 1 characters.
To change the speed of the practice code, turn the encoder. To change the Farnsworth spacing (space between characters in wpm), press and hold the encoder then turn it.
The bottom line will show the state of the transmitter interlock, speed, and Farnsworth spacing.
Practice Session Send and Wait Modes When you select one of the Send and Wait modes only the # of characters sent, % of Good, % of Errors, and your Average Response time is displayed.
When you hear the character or group being sent, enter it on the keyboard as quickly as possible. The lower your response time the better.
If you enter the wrong character or group the Micro will send a error (8 Dits) then resend that character or group. If you still enter the wrong character or group the Micro will increment the Error % and move to the next character.
Press [Space] to repeat the last character or group (without penalty).
Press [Enter] to toggle Run and Pause mode. This also resets the counters.

WARNING! If the transmitter interlock is enabled, the practice session will be sent to the Micro’s Key Out jack and your radio can broadcast your practice session.

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One other thing… The random character generator doesn’t filter the words it generates! This opens the possibility that inappropriate words may be generated. Sometimes this might add some spice to your practice session!
If this offends you in any way, please DO NOT USE Practice Mode in the Micro.
Call
Enter your call sign here. This field will be used to populate the Tx message buffer with your call when you insert the call prosign [^] in the buffer. This is useful for CQ messages, contest exchanges, etc.
NOTE: Your call also serves as the Telnet unlock key when you enable Telnet Login in the WiFi menu. With the Telnet login option enabled you must enter your call to enable a Telnet session. This helps prevent unauthorized access to your Micro and radio by bad actors if you forward the Micro’s Telnet port (IP Port 7950) through your router for internet access. More information on this option can be found in the WiFi Menu section.
Serial Number
This field holds the current contact serial number for the contest keyer. You can edit it here as needed. You can insert the current contact serial number into a Tx message buffer by entering the SN prosign, [#]. The current serial number will be inserted into that message in place of the prosign when that message buffer is sent. To repeat a contest message without incrementing the SN send Tx message #1 (the repeat buffer).
Exchange
This field holds the contest exchange. Edit it here as needed. You can insert the contest exchange into a Tx message buffer by entering the Exchange prosign, [%]. The exchange field will be inserted into that message in place of the prosign when that message buffer is sent.

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Configuration Menu
The Configuration Menu provides easy access to the Micro’s settings.
From here you can manage the Micro’s WiFi system, change profiles, change the selected profiles name, select the type of radio connected to the Micro, define the CAT connection type, change the tag line for the Home page, recalibrate several interfaces, change the Code Report options, and manage the configuration files that are saved in non-volatile RAM on the Micro.
This option can be accessed by pressing Ctrl+c in the Home page assigned to an FKey or MFB in the Quick Key Function Option menu using the Config option.
WiFi Menu
The WiFi Menu allows you to manage the WiFi network connection on your Micro.
This menu can be accessed by pressing Ctrl+w in the Home page.
Connect/Disconnect WiFi
This option allows you to toggle the connection status. You must have the SSID and Password for your router set before you can connect.
Reset IP Connection
This option is available when the Micro is connected to your WiFi network. It allows you to reset the TCP connection without disconnecting the WiFi connection. This is handy to cycle the connection to your Flex or browser if they’re not paying attention to the Micro.
SSID
Enter your router’s SSID here. The SSID is may be case sensitive so enter it exactly as shown on your router just to make sure.
NOTE: If using CTR2-Voice as an access point, enter its SSID, CTR2-Voice, here.

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Password
This is sometimes referred to as the Passkey. Enter your router’s password here. This field is always case sensitive. The text if blocked with 11 asterisks on this page. The actual password will be visible in the text editor. The Micro supports WPA/WPA2 Personal and WPA3 encryption.
NOTE: If using CTR2-Voice as an access point, enter its password, ctr2-voice, in all lower case characters, here.
Auto Connect
This option allows you to set the Micro so that it connects to WiFi when it powers up. This is great if you’re running a Flex radio or any other IP CAT controlled radio. If you’re running SmartSDR v2.xx make sure it is running before you power the Micro up or the Micro connection will block SmartSDR from opening.
NOTE: You can override the Auto Connect feature by pressing and holding MFB1 during power up.
NOTE: When a terminal program is connected to the Micro’s USB serial port, the Micro will reboot when the terminal program disconnects. If you want the WiFi to reconnect after this reboot, set Auto Connect=ON.
Server Lock/Unlock
In a perfect world all web browsers would work the same way. Unfortunately they don’t. Desktop browsers and mobile browsers are completely different. Some browsers will accept frequency updates from the Micro on a connection that has been closed. Others won’t. To help the Micro’s server work with the greatest number of browsers I added the Server Lock/Unlock option. The Lock option tells the Micro to keep the client/server connection open continually after the browser initiates the first connection. The Unlock options allows the Micro to stop the connection to the client after it sends the response and then send frequency updates to the browser on the closed connection.
The option defaults to Unlocked. If you have problems with your browser updating the frequency toggle it to Locked.
See the Browser Issues section for helpful hints if you run into problems on your browser.
Telnet Login
This option allows you to enable a basic login scheme on the Micro. This helps protect the Micro and your radio against unauthorized activity by internet bad actors. The login IS NOT a true Telnet login. Instead, when you connect a terminal program to the Micro’s address and IP port the Micro will not respond to the connection. It will wait until the correct password is entered by the connecting computer. In this scheme, your call sign is password if you’ve set it, or the

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word micro if your call sign hasn’t been set. The password is case sensitive. Once you enter the correct password the port will unlock until the power is cycled on the Micro.
NOTE: You will be given three tries in two minutes to enter the correct password. If the wrong password is entered the Micro disconnects. Reconnect and try again. After three tries the Micro will lock out the connection for two minutes and the cycle repeats. A note will be placed at the bottom of the Home page if logins fail.
Station Address and Telnet Port #
These will be populated when the Micro is connected to a network. This is the IP address and IP port # it uses for IP Telnet connections (7950) to the Micro. Enter the IP address and port # into your Telnet terminal program to connect to the Micro.
NOTE: The Micro doesn’t use the standard Telnet port. Refer to IP Session in Appendix E for more information.
Radio Profile Menu
The Micro supports up to 10 radio profiles. These are similar to the Radio Ports in the Mini but on the Micro serial CAT polarity strapping changes must be done manually.
Flex radio users can create a profile for different slices then easily switch between them using this menu.
Edit the name associated with a profile in the Name menu.
Each profile contains all of the settings for that radio in addition to a favorite frequency list for that radio. You can share a common favorite frequency list among all of the radios on this list by selecting Shared Database in the Frequency menu.
Radio profiles also include the WiFi and Report settings. This allows you to setup different profiles for various operating scenarios.
Here are two examples:
1) When you use the Micro and CTR2-Voice at home, save one profile with the WiFi credentials for your station’s WiFi router and the IP address of CTR2-Voice when it’s connected as a WiFi Station to your station router.
2) When you use the Micro and CTR2-Voice in a portable scenario, save another profile with the WiFi credentials for the CTR2-Voice in access point mode (SSID=CTR2-Voice, password=ctr2voice) and the IP address of CTR2-Voice in this mode (192.168.4.1).

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Name (Radio Profile)
This option allows you to edit the name used to identify the selected radio profile. The name is displayed in the top-left corner of the Home page in the terminal interface and as the top header in the browser interface to help you keep track of which profile you have selected.

CAT Menu
The CAT item opens the CAT Menu where you select the radio model the Micro is connected to. CAT is an acronym for `Computer Aided Transceiver’. Some manufactures have different names for this such as `Control Port’, or Icom’s `CIV’. They all mean the same thing.
The Micro supports a wide range of modern transceivers. If your radio isn’t on the list it may still be supported. You can contact me and I’ll check your radio’s protocol and let you know if the Micro will work with it.
Bridge
Bridge is a special mode allows you use the Micro as a WiFi/Serial interface. Data coming into the Micro’s WiFi UDP port is forwarded to the serial CAT port and data coming from the radio’s serial CAT port is forwarded to the UDP port and on the remote PC. No formatting is done on the data. When Bridge mode is selected most of the Micro’s options are turned off.
This is similar to using an RS-232 IP/Serial Terminal interface however the Micro supports several serial interfaces.
If you are connecting to your radio using serial CAT control you will also need to set the CAT polarity jumpers or DIP switch settings for that radio. More information on this can be found in the CAT Polarity Jumpers/DIP Switch Settings section in Appendix C.
Connection Menu
The Connection Menu allows you to select either the baud rate for the serial CAT port or the IP address and IP Port # if using WiFi to connect to your radio (i.e. Flex radio, K4, etc).
Baud Rate The first eight items in this menu set the baud rate from 1200 to 115200 baud for the serial CAT port on the Micro (i.e. the CAT I/O jack on the back of the unit). The Micro’s baud rate must match the baud setting on your radio and you must strap the Micro’s CAT polarity to match your radio’s CAT interface.

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IP Address, IP Port #, Port Type If you’re connecting to an IP based radio like the Flex, K4, Thetis, or piHPSDR, enter its IP address and IP port here. The Micro will insert the default TCP port # for the selected radio. You can change the port # if you have changed the default port on your radio. You can also change the IP port type between TCP and UDP if your radio uses the UDP port type instead of TCP.
By entering the IP address of a remote Mini or Micro, and using UDP port 7951 you can create an ad hoc network to connect two devices together for remote operation. This allows you have a Micro in your shack connected to your radio’s serial CAT port and control it remotely with a Mini or another Micro. You can even have two or more devices located in your shack with one device (or more) dedicated to a certain function like Speed, Volume, or RIT. This allows you to use one device to tune the radio and the other to change keyer speed, RIT, volume, etc.) The Expanded Options section explains these configurations in more detail.
NOTE: You can’t use the hotspot on your tablet or cell phone to create a remote ad hoc network because these hotspots use Carrier Grade Network Address Translation (CGNAT) which doesn’t allow port forwarding or UDP traffic.
Reset IP The Reset IP option on this page quickly resets the IP connection without going through a full disconnect sequence. This is useful if you need to get the attention of an IP radio. This option is also included in the WiFi Menu.
Settings Menu
The Settings Menu allows you to change several settings on the Micro.
Tag Line Edit this field to change the tag line displayed at the bottom of the terminal display.
S-Meter Calibration This option allows you to calibrate the S-meter on the Micro’s Home page to match the radio’s meter. The calibration value represents a ratio between the received meter value and the value displayed on the screen. This is a floating point number so fractional values are acceptable. Adjust this as needed.
NOTE: Set the S-meter calibration to 0 to disable the S-meter.
Encoder Type There are two encoders available for the Micro. A detent encoder has feedback as you turn the dial (i.e. small `bumps’). A no-detent encoder is smooth, with no feedback. You can choose the one that fits your preference when you order your Micro, but I recommend that you go with the detent encoder if you will be using the Micro in Code Report mode with no display or with the browser interface. This is because it gives you feedback as you move between the menus.

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Another advantage is that inadvertently bumping the knob on the detent encoder doesn’t change your radio’s frequency.
When set to the No-Detent (slow) option the encoder slows to ½ speed when navigating menus.
Encoder Direction The Encoder Direction allows you to reverse the encoder.
The Micro’s design allows the encoder and pushbuttons to be mounted on the back of the PCB. This configuration allows you to mount the Micro to a panel or in another device in your shack. If you mount the Micro this way, Reverse the encoder’s direction here.
Menu

Documents / Resources

Lynovation CTR2-Micro Radio Control [pdf] Instruction Manual
CTR2-Micro Radio Control, CTR2-Micro, Radio Control

References

User Manual

Lynovation CTR2-Micro Radio Control Instruction Manual

CTR2-Micro Radio Control

Specifications

Product Information

Product Usage Instructions

Introduction

Getting Started

Customization Options

Micro Features

Radio Menus

FAQ

Q: How do I connect the CTR2-Micro to piHPSDR?

Q: What are the Encoder Rules mentioned in the manual?

Documents / Resources

References

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