Slide the door out to release the catch for battery
installation. Insert two AA batteries as indicated by the polarity
markings inside the battery compartment.

Battery Status LED Indicator:

The LED indicator will show the battery status. Green indicates
sufficient power, red indicates low battery, and flashing red
indicates critically low battery.

Belt Clips:

Attach the transmitter securely to your belt or clothing using
the provided belt clips to ensure stable operation.

IR (infrared) Port:

Use the IR port for firmware updates or configuration changes
using compatible devices.

Audio Input:

Connect your audio source, such as a lavaliere microphone or
line-level input, to the audio input jack for transmission.

Features and Functions:

High efficiency digital circuitry

Studio-quality audio performance
Wide range input gain adjustment

DSP-controlled limiting
AES 256-CTR encryption

Operating Instructions:

Turn on the transmitter by pressing the power button.
Select the desired frequency range and output power using the
controls.

Connect your audio input source and adjust the gain settings
for optimal performance.
Monitor the battery status indicator regularly to ensure
uninterrupted operation.

FAQ:

Q: How do I protect the transmitter from moisture damage?

A: Wrap the DBu in a plastic baggie or use other protective
measures to prevent moisture exposure, especially from sweat.

“`

View Fullscreen

DBu-LEMO
Digital Belt Pack Transmitter DBu-LEMO DBu-LEMO/E01

INSTRUCTION MANUAL

LEMO® is a registered trademark of Interlemo Holding S.A. Corporation Switzerland
Fill in for your records: Serial Number: Purchase Date:

WARNING: Moisture, including talent’s sweat, will damage the transmitter. Wrap the DBu in a plastic baggie or other protection to avoid damage.
Rio Rancho, NM, USA www.lectrosonics.com

DBu-LEMO, DBu-LEMO/E01

Table of Contents
Introduction………………………………………………………………… 2 Frequency Agility ……………………………………………………… 2 Encryption ……………………………………………………………….. 2 DSP-controlled Input Limiter……………………………………… 2 DBu-LEMO Block Diagram………………………………………… 3
Battery Installation ……………………………………………………… 4 Battery Status LED Indicator……………………………………… 4 Belt Clips …………………………………………………………………. 5 IR (infrared) Port……………………………………………………….. 5 Audio Input………………………………………………………………. 5
Features and Functions ………………………………………………. 5 Operating Instructions ………………………………………………… 6
Powering On in Operating Mode………………………………… 6 Powering On in Standby Mode ………………………………….. 6 Powering Off ……………………………………………………………. 6 Power Menu Options…………………………………………………… 6 Entering the Power Menu………………………………………….. 6 Main Menu and Setup Screen Details ………………………….. 6 Entering the Main Menu ……………………………………………. 6 LCD Menu Map…………………………………………………………….7 Menu Item Descriptions…. ……………………………………………7 Gain/Adjusting the Inut Gain……………………………………… 8 Roll Off…………………………………………………………………….. 8 InpCfg (Mic Input Configuration)………………………………… 8 Setting Frequency…………………………………………………….. 8 Transmitting Tuning Groups ………………………………………. 8 RF On? ……………………………………………………………………. 9 Setting Transmit Output Power ………………………………….. 9 Send Freq………………………………………………………………… 9 SendAll ……………………………………………………………………. 9 GetFreq …………………………………………………………………… 9 GetAll………………………………………………………………………. 9 Key Type………………………………………………………………….. 9 WipeKey ………………………………………………………………….. 10 SendKey ………………………………………………………………….. 10 Programmable Switch Functions……………………………….. 10 Selecting Battery Type………………………………………………. 10 Remote ……………………………………………………………………. 10 Locking the Settings…………………………………………………. 11 Backlight …………………………………………………………………. 11 Defaults …………………………………………………………………… 11 About ………………………………………………………………………. 11 Whip Antennas …………………………………………………………… 11 Microphone Wiring ……………………………………………………… 11 Line Input Wiring and Use …………………………………………… 11 Supplied and Optional Accessories……………………………… 12 LectroRM……………………………………………………………………. 13 Wireless Designer Software ……………………………………….. 14 Firmware Update Instructions……………………………………… 14 Specifications …………………………………………………………….. 14 Troubleshooting………………………………………………………….. 15 Service and Repair ……………………………………………………… 16 Returning Units for Repair…………………………………………. 16

Introduction
The DBu-LEMO transmitter employs high efficiency digital circuitry for extended operating time on two AA batteries. The transmitter can tune in coarse or fine steps across the UHF television band from 470.100 to 607.950 MHz (E01: 470.100 – 691.175 MHz), with a selectable output power of 10, 25 or 50 mW. The pure digital architecture enables AES 256-CTR encryption for high level security applications.
Studio quality audio performance is assured by high quality components in the preamp, wide range input gain adjustment and DSP-controlled limiting. Input connections and settings are included for any lavaliere microphone, dynamic microphones and line level inputs. Input gain is adjustable over a 52 dB range in 1 dB steps to allow an exact match to the input signal level, to maximize the dynamic range and signal to noise ratio.
Frequency Agility
The transmitter tunes across the entire frequency range, from 470.100 MHz to 607.950 MHz (E01: 470.100 691.175).
Encryption
When transmitting audio, there are situations where privacy is essential, such as during professional sporting events, in court rooms or private meetings. For instances where your audio transmission needs to be kept secure, without sacrificing audio quality, Lectrosonics implements AES256 encryption in our digital wireless microphone systems. High entropy encryption keys are first created by a Lectrosonics receiver, such as the DSQD Receiver. The key is then synced with the DBu-LEMO via the IR port. The audio will be encrypted and can only be decoded if both DBu-LEMO and receiver have the matching encryption keys. If you are trying to transmit an audio signal and keys do not match, all that will be heard is silence.
DSP-controlled Input Limiter
The transmitter employs a digitally-controlled analog audio limiter prior to the analog-to-digital converter. The limiter has a range greater than 30 dB for excellent overload protection. A dual release envelope makes the limiter acoustically transparent while maintaining low distortion. It can be thought of as two limiters in series, connected as a fast attack and release limiter followed by a slow attack and release limiter. The limiter recovers quickly from brief transients, so that its action is hidden from the listener, but recovers slowly from sustained high levels to keep audio distortion low and preserve short term dynamic changes in the audio.

LECTROSONICS, INC.

DBu-LEMO Block Diagram

+5V
Input Jack

Servo Bias Bias Voltage

Supply

0, 2 or 4V

Input Preamp
Gain Adj

HI/Lo Pass Filter

Audio

Shunt Limiter

Limiter Control

DBu/LEMO Transmitter

A-D Converter

D-A Converter

I + Q Baseband
Signals

I2S

(2) AA

Batteries

Low pass filters
Switching Power Supply

DSP Clock

Key Received Blue LED

Microprocessor Keypad

Power LED Tricolor

Firmware Update
UART
Security Key

IR Port
USB Jack

Oscillator VCTXO
36.864 mHz

PLL Ref

Phase Locked Loop

Voltage Controlled Oscillator
Control

Low Pass Filter

Digital Belt-Pack Transmitter

IQ Modulator

Buffer
Final Amplifier

Filters

Consumer Alert for US Users – FCC Order DA 10-92
Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888- CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC’s wireless microphone website at www.fcc.gov/cgb/wirelessmicrophones. To operate wireless microphone systems at power greater than 50mW, you must qualify as a Part 74 user and be licensed. If you qualify and wish to apply for a license go to: http://www.fcc.gov/Forms/Form601/601. html

Rio Rancho, NM

DBu-LEMO, DBu-LEMO/E01

Battery Installation
The transmitter is powered by two AA batteries. We recommend using two AA Duracell Ultra batteries. The battery status circuitry compensates for the difference in voltage drop between alkaline and lithium batteries across their usable life, so it’s important to select the correct battery type in the menu. Because rechargeable batteries run down quite abruptly, using the Power LED to verify battery status will not be reliable. However, it is possible to track battery status using the battery timer function available in the receiver. Push outward on the battery compartment door and lift it to open.
Slide door out to release catch
Lift door to open
Insert the batteries according to the markings on the back of the housing. If the batteries are inserted incorrectly, the door will close but the unit will not operate. The battery contacts can be cleaned with alcohol and a cotton swab, or a clean pencil eraser. Be sure not to leave any remnants of the cotton swab or eraser crumbs inside the compartment.

Contact springs
Battery Status LED Indicator
Alkaline, lithium or rechargeable batteries can be used to power the transmitter. The type of batteries in use are selectable in a menu on the LCD.
When alkaline or lithium batteries are being used, the LED labeled BATT on the keypad glows green when the batteries are good. The color changes to red when the they are nearing the end of life. When the LED begins to blink red, there will be only a few minutes remaining.
The Power/Function LED on the top panel will mirror the keypad LED unless the programmable switch is set to Mute, and the switch is turned on.
The exact point at which the LEDs turn red will vary with battery brand and condition, temperature and power consumption. The LEDs are intended to simply catch your attention, not to be an exact indicator of remaining time.
A weak battery will sometimes cause the Power LED to glow green immediately after the transmitter is turned on, but it will soon discharge to the point where it will turn red or the unit will turn off completely.
Rechargeable batteries give little or no warning when they are depleted. If you wish to use these batteries in the transmitter, the most accurate way to determine runtime status is by testing the time provided by a particular battery brand and type, then using the BatTime function to determine remaining runtime.
NOTE: Refer to the Main Menu and Setup Section for BatTime details.

LECTROSONICS, INC.

Digital Belt-Pack Transmitter

Features and Functions

Modulation Indicators*

IR Port

Antenna Port

-20 AUDIO -10 IR PORT PWR/FUNC

Programmable

Full access to all settings is provided through the keypad

Function Switch

and LCD. The transmitter can also be configured as a

“one button” device by locking the ability to make chang-

LEMO es with the keypad, and configuring the top panel switch

Audio as power on/off.
Input Jack

Key verification LED**

Battery status LED
Belt clip mounting hole
Battery compartment
door
Return to previous screen

DBu

470.100

-40

-20 +0

Belt clip mounting hole
USB Port
Menu navigation buttons
Power button

* When the transmitter is set to MUTE, the -10 Modulation Indicators LED will glow solid red. Otherwise, the -10 and -20 Modulation Indicators LED will glow light green or red depending on modulation levels.
** The Key verification LED will glow solid blue if the key is set to Universal or if an encryption key is stored in the unit when set to Standard, Shared or Volatile key policies. The blue LED will blink when in these key modes and no key is stored.
Remove hole cap to attach spring loaded
belt clip

Belt Clips
The wire belt clip may be removed by pulling the ends out of the holes in the sides of the case. Be sure to have a firm grip to avoid scratching the surface of the housing.
An optional spring-loaded, hinged belt clip (model number BCSLEBN) is also available. This clip is attached by removing the plastic hole cap on the back of the housing and mounting the clip with the supplied screw.
IR (infrared) Port
The IR port is available on the top of the transmitter for quick setup using a receiver with this function available. IR Sync will transfer the settings for frequency from the receiver to the transmitter.
Audio Input
The input jack is a rugged 3-pin LEMO connector with a threaded locking sleeve.

Rio Rancho, NM

DBu-LEMO, DBu-LEMO/E01

Operating Instructions
Powering On in Operating Mode
Press and hold the Power Button for several seconds until a moving bar on the LCD progresses.

Hold for Rf On

DBu 470.100

-40

-20 +0

When you release the button, the unit will be operational with the RF output turned on and the Main Window displayed.

Powering On in Standby Mode

A brief press of the Power Button , and releasing it

before the moving bar progresses, will turn the unit on

with the RF output turned off. In this Standby Mode the

menus can be browsed to make settings and adjust-

ments without the risk of interfering with other wireless

systems nearby.

RF indicator blinks

Hold for Rf On

Release Power Button before the moving bar progresses to enter standby
mode

DBu

470.100

-40

-20 +0

After settings and adjustments are made, press the power button again to turn the unit off, or turn on the Transmit function by entering the main menu, selecting Xmit, then RF On?

Powering Off

Powering Off . . .

From any screen, power can be turned off by selecting Pwr Off in the power menu, holding the Power Button in and waiting for the moving bar to progress, or with the programmable switch (if it is configured for this function).

If the power button is released, or the top panel switch is turned back on again before the moving bar progresses, the unit will remain turned on and the LCD will return to the same screen or menu that was displayed previously.

NOTE: If the programmable switch is in the OFF position, power can still be turned on with the power button. If the programmable switch is then turned on, a brief message will appear on the LCD.

Connecting the Signal Source
The input jack is a rugged 3-pin LEMO connector with a threaded locking sleeve.

Main Menu and Setup Screen Details
Entering the Main Menu
The LCD and keypad interface makes it easy to browse the menus and make the selections for the setup you need. When the unit is powered up in either the operating or the standby mode, press MENU/SEL on the keypad to enter a menu structure on the LCD. Use the and arrow buttons to select the menu item. Then press the MENU/SEL button to enter the setup screen.
Gain 25

-40

-20

The prompt in the upper right corner may display one or both arrows, depending upon what adjustment can be made. If the changes are locked, a small padlock symbol
will appear.

Main Window Indicators
The Main Window displays on/off status, talkback or audio mute status, standby or operating mode, operating frequency, audio level and battery status.

Audio Mute or Talkback status
Frequency (MHz)

DBu
MUTE
470.100

-40

-20 +0

RF On/Off Status
Battery status

Audio level
If the programmable switch function is set for Mute or Talkback, the Main Window will indicate that the function is enabled.

DBu
MUTE
470.100

-40

-20 +0

When the switch is turned on, the mute icon appearance will change and the word MUTE will blink at the bottom of the display. The -10 LED on the top panel will also glow solid red.

DBu
MUTE
470.100

Main Window will blink the word MUTE when
the audio is muted

<MUTE>

LECTROSONICS, INC.

LCD Menu Map

Input

Gain Rolloff

Gain 22
|-40 |-20 +0|

Select level with arrow buttons to select.

Rolloff 70 Hz 1

Select option with arrow buttons to select.

InpCfg

InpCfg
M152

Select option with arrow buttons to select.

Xmit

Freq. RF On? Tx Power

Freq.
470.100
RF On? Yes No
TxPower 10 mW 25 mw 50 mW

Select Freq in mHz or kHz with arrow buttons to select.
Select option with arrow buttons to select.
Select option with arrow buttons to select.

IR&Key

Send Freq Send All Get Freq

Get All Key Type

Wipe Key

This menu item is only available in Shared Key mode
Setup

Send Key ProgramSw

Send Freq
Sync —>

Select option with arrow buttons to select.

Send All
Sync —>

Select option with arrow buttons to select.

IR SYNC
OK IR SYNC OK

Get Freq
Sync —>

to send key.

IR SYNC
OK

Get All
Sync —>

to get key.

Key Type Standard

Select option with arrow buttons to select.

IR SYNC
OK

Wipe Key? No Yes

Select option with arrow buttons to select.

Encrytion key
ERASED

Send Key
Send —>

Select option with arrow buttons to select.

IR SYNC
OK

ProgSw TalkBk

Select option with arrow buttons to select.

Bat Type Remote Locked?

Bat Type Alk. Lith.
Remote Enable Ignore

Select option with arrow buttons to select.
Select option with arrow buttons to select.

Locked? Yes No

Select option with arrow buttons to select.

AutoOn? Backlit LED Off Default About

AutoOn? No Yes

Select option with arrow buttons to select.

Backlit On 30 Seconds 5 Seconds

Select option with arrow buttons to select.

LEDs
On Off

Select option with arrow buttons to select.

Default settings
No
Yes

Select option with arrow buttons to select.

About
DBuL/E01 V1.03 /1.06

or BACK to go back.

Rio Rancho, NM

Digital Belt-Pack Transmitter NOTE: The settings will be stored when the BACK button is pressed.
7

DBu-LEMO, DBu-LEMO/E01

Menu Item Descriptions

Input

Gain
Gain can be set, from -7 to +44, by using the and arrow buttons.

Adjusting the Input Gain
The two bicolor Modulation LEDs on the top panel provide a visual indication of the audio signal level entering the transmitter. The LEDs will glow either red or green to indicate modulation levels as shown in the following table.

Signal Level

-20 LED

-10 LED

Less than -20 dB

Off

-20 dB to -10 dB

Green

Off

-10 dB to +0 dB

Green

+0 dB to +10 dB

Red

Green

Greater than +10 dB

Red

NOTE: Full modulation is achieved at 0 dB, when the “-20” LED first turns red. The limiter can cleanly handle peaks up to 30 dB above this point.

It is best to go through the following procedure with the transmitter in the standby mode so that no audio will enter the sound system or recorder during adjustment.

1) With fresh batteries in the transmitter, power the unit on in the standby mode (see previous section Powering On in Standby Mode on page 6).

2) Navigate to the Gain setup screen.

Gain 25

-40

-20

3) Prepare the signal source. Position a microphone the way it will be used in actual operation and have the user speak or sing at the loudest level that occur during use, or set the output level of the instrument or audio device to the maximum level that will be used.
4) Use the and arrow buttons to adjust the gain until the 10 dB glows green and the 20 dB LED starts to flicker red during the loudest peaks in the audio.
5) Once the audio gain has been set, the signal can be sent through the sound system for overall level adjustments, monitor settings, etc.
6) If the audio output level of the receiver is too high or low, use only the controls on the receiver to make adjustments. Always leave the transmitter

gain adjustment set according to these instructions, and do not change it to adjust the audio output level of the receiver.
Rolloff (Low Frequency Roll-off)
The low frequency audio roll-off is adjustable to optimize performance for ambient noise conditions or personal preference. Low frequency audio content may be desirable or distracting, so the point at which the roll-off takes place can be set to 20, 35, 50, 70, 100, 120 or 150 Hz.
Rolloff
70 Hz
InpCfg (Mic Input Configuration)
This setting allows for configuration for use with certain microphones, or for setting custom parameters.
Available options are: M152, MKE2, COS-11, B6, DPA, PSA, Dynamic, Line In, Custom (configurable) and Other Lav.
Xmit
Setting Frequency
Frequency (mHz and kHz) in can be set by using the MENU/SEL button to choose mHz or kHz and the and
arrows to adjust frequency.
Tuning Groups
Tuning groups can be received via IR (Infared) port sync from a receiver. The group frequencies are set by the receiver. The group names will be displayed at the bottom of the screen as Grp x, Grp w, Grp v, or Grp u. Use the MENU/SEL button to toggle between options and the and arrow buttons to adjust.
LECTROSONICS, INC.

Digital Belt-Pack Transmitter

Gain Freq. ProgSw Rolloff
RF On?
Turn Rf off to preserve battery power while setting other transmitter functions. Turn it back on to begin transmitting.. Use the and arrow buttons to toggle and MENU/SEL to save.
TxPower
Allows the transmitter output power to be set as 10, 25 or 50 mW. Use the and arrow buttons to scroll and MENU/SEL to save.
IR&Key
The operations below depend on the compatibility mode selected and the receiver used.
SendFreq
Sync to send frequency to another device via the IR Port.
SendAll
Sync to send all available settings to another device via the IR port, including the performer’s name, (or whatever name the user chooses for the DBu), frequency, mixer settings and limiter settings.
GetFrq
Sync to receive (get) frequency from the receiver via the IR port.
GetAll
Sync to receive (get) all available settings from another device via the IR port, including the performer’s name, (or whatever name the user chooses for the DBu), frequency, and talkback state.
Rio Rancho, NM

Key Type
The DBu receives an encryption via the IR port from a key generating receiver. Begin by selecting a key type in the receiver and generating a new key (key type is labeled KEY POLICY in the DSQD receiver). Set the matching KEY TYPE in the DBu and transfer the key from the receiver (SYNC KEY) to the DBu via the IR ports. A confirmation message will display on the receiver display (IR SYNC OK) if the transfer is successful. The transmitted audio will then be encrypted and can only be listened to if the receiver has the matching encryption key.
The encryption system in Lectrosonics Digital modes D2, DCHX, and HDM may be configured in four different ways, determined by a parameter known as the Key Type. The four key types range from least secure but most convenient, to most secure but least convenient. Below are descriptions of the four Key Types and how they work.
· Universal: This is the default key type, the simplest to use, and the least secure. While encryption is technically being performed and a scanner or simple demodulator would not reveal the signal content, communications are not truly secure. This is because all Lectrosonics products employing the Universal key type use this same “universal” encryption key. With this key type selected, keys do not need to be created or exchanged, and wireless devices can be used without attention to the encryption feature.
· Shared: This is the easiest encryption mode to use while employing a uniquely generated key. This key type offers excellent security and considerable flexibility. Once a key has been created, it can be shared an unlimited number of times with any compatible device which, in turn, can also share the key. This is especially useful when multiple receivers may need to pick up various transmitters.
· Standard: The Standard key type offers enhanced security, at the cost of some complexity. Standard keys are “instance controlled”, which allows the hardware to protect against “differential attacks”. A Standard key can only be sent by the device that created it, and only up to 256 times. Unlike with Shared keys, devices receiving a Standard key cannot pass it on.
· Volatile: The Volatile key type is the most secure, and also the least convenient to use. Volatile keys behave identically to Standard keys, except that they are never stored. Equipment which is turned off while using a Volatile key will come back on with no key. If a key-generating device is left on, the key can be re-shared with units in the system that have lost their keys. Once all equipment having used a given Volatile key is powered off, that key is effectively destroyed. This may be required in some highly secure installations.
9

DBu-LEMO, DBu-LEMO/E01

Ke y Ty p e Univrsal

Note: If Standard, Shared or Volatile Key is selected and no key is stored, the blue LED will blink.
WipeKey
This menu item is only available if Key Type is set to Standard, Shared or Volatile. Select Yes to wipe the current key and enable the DBu to receive a new key.
WipeKey?
No Ye s
SendKey
This menu item is only available if Key Type is set to Shared. Press MENU/SEL to sync the Encryption key to another transmitter or receiver via the IR port.
SendKey

Setup

ProgSw (Programmable Switch Functions)
The programmable switch on the top panel can be configured using the menu to provide several functions:
· (none) – disables the switch
· Mute – mutes the audio when switched on; LCD will display a blinking “MUTE” and the -10 LED will glow solid red.
· Power – turns the power on and off
· TalkBk – switches the audio output on the receiver to a different channel for communication with the production crew. Requires a receiver with this function enabled.

ProgSw Power

Use the and arrow buttons to select the desired function or disable the switch

NOTE: The programmable switch will continue to operate whether or not settings are locked.
Selecting Battery Type
The voltage drop over the life of batteries varies by type and brand. Be sure to set the correct battery type for accurate indications and warnings. The menu offers alkaline or lithium types.

B a t Ty p e

Alk. Lith.

If you are using rechargeable batteries, it is better to use the timer function on the receiver to monitor the battery life rather than the indicators on the transmitter. Rechargeable batteries maintain a fairly constant voltage across the operating time on each charge and stop working abruptly, so you will have little or no warning as they reach the end of operation.
Remote
Remote control “dweedle” tones from a smart phone can be used to control the transmitter. This setting Enables or Disables it.
Locked?
The settings can be locked to prevent inadvertent changes being made.

Locked?
Ye s No

Gain 25

-40

-20

A small padlock symbol will appear on adjustment screens when changes have been locked.

When settings are locked, several controls and actions can still be used:
· Settings can still be unlocked
· Menus can still be browsed
· Programmable switch still works (Mute, Talkback and On/Off)
· Power can be turned off by using the programable switch if in Power mode or by removing the batteries.

LECTROSONICS, INC.

Digital Belt-Pack Transmitter

Backlit
Sets the screen backlight to be always on, on for 30 seconds or on for 5 seconds.
LED Off
Turns all LEDs on or off.
Restoring Default Settings
This is used to restore the factory settings.
About
This shows version and firmware information.

Microphone Wiring
Looking into the 3 pin LEMO mic connector from the outside of the transmitter, the pin centered in the two guide slots is pin 1 (ground). Pin 2 is a 1k resistor to ground. Pin 3 is the audio/bias connection for two-wire microphones and line inputs.

Pin 1

Guide slots

Whip Antennas

Because the transmitter tunes across such a broad frequency range, it is best to use the appropriate antenna for maximum operation. Two antennas are included with the transmitter, and are shipped from the factory pre-cut and fully assembled. Each antenna covers three blocks. Use the chart below to determine which antenna best fits your needs.

Frequency Band Block Range MHz

Cap Color

Antenna

470 470.100 – 495.600 Black

AMM19

A1 19 486.400 – 511.900 Black

AMM19

20 512.000 – 537.500 Black

AMM19

21 537.600 – 563.100 Red

AMM22

B1 22 563.200 – 588.700 Red

AMM22

23 588.800 – 607.950 Red

AMM22

Pin 2

Pin 3

Voltages, polarity, impedance and line level for all signal sources are selected by menus. Menu selections include presets for popular microphones, and a sub-menu for manual setup. Refer to the section entitled Setup Screens on the previous page for details.
Two-wire electret lavaliere:
Pin 1 – Ground (shield) Pin 3 – Audio and Bias
Sanken COS-11 lavaliere
Recommended Wiring: Pin 1 – Shield (ground) Pin 2 – White (source load) Pin 3 – Black (bias and audio)

NOTE: The COS-11 can also be wired in a twowire configuration. Contact Plus24/Sanken for details.
The Sanken CUB-01 is not supported.

Line Input Wiring and Use
Pin Configuration:
Pin 1: Shield (ground) Pin 2: Audio
Transmitter Settings:
Unlike the old configuration, the new line input configuration requires no fixed gain setting. The gain setting can be adjusted as needed for the specific input level used.

Rio Rancho, NM

DBu-LEMO, DBu-LEMO/E01
Supplied Accessories
P/N 26895 Wire belt clip

LTCVR Silicone cover prrotects from moisture and dust.

40096 (2) Alkaline batteries. Brand may vary.
AMM19 and AMM22 Lectrosonics provides “whip” antennas for use with the WM transmitter. The antennas are cut to the frequency range shown in the chart on p. 11 and include a 50 Ohm SMA connector.
Optional Accessories
BCSLEBN Spring-loaded belt clip
ACOAXTX Antenna, Coaxial, SMA Plug for Transmitters, Specify Block.
12

LECTROSONICS, INC.

Digital Belt-Pack Transmitter

LectroRM
By New Endian LLC
LectroRM is a mobile application for iOS and Android operating systems to remotely control Lectrosonics Transmitters.
The app remotely changes settings on the transmitter through the use of encoded audio tones, which when received by the attached microphone, will alter the configured setting. The app was released by New Endian, LLC in September 2011. The app is available for download and sells for about $25 on the Apple App Store and Google Play Store.
LectroRM’s remote control mechanism is the use of an audio sequence of tones (dweedles) that are interpreted by the transmitter as a configuration change. The settings available in LectroRM are:
· Audio Level (Gain)
· Frequency
· Sleep Mode
· Lock Mode
· Output Power
· Low Frequency Roll-off
· LED on/off
User Interface
The user interface involves selecting the audio sequence related to the desired change. Each version has an interface for selecting the desired setting and the desired option for that setting. Each version also has a mechanism to prevent accidental activation of the tone.
iOS

Android
The Android version keeps all settings on the same page and allows the user to toggle between the activation buttons for each setting. The activation button must be long pressed to activate. The Android version also allows users to keep a configurable list of full sets of settings.
Activation
For a transmitter to respond to remote control audio tones, the transmitter must meet certain requirements:
· The transmitter must not be turned off; it can however be in sleep mode.
· The transmitter must have a later firmware version that enables remote control.
· Remote control must be enable on the transmitter.
Please be aware this app is not a Lectrosonics product. It is privately owned and supported by New Endian LLC, www.newendian.com.

The iPhone version keeps each available setting on a separate page with the list of options for that setting. On iOS, the “Activate” toggle switch must be enabled to show the button which will then activate the audio. The iOS version’s default orientation is upside-down but can be configured to orient right-side up. The purpose for this is to orient the device’s speaker, which is at the bottom of the device, closer to the transmitter microphone.

Rio Rancho, NM

DBu-LEMO, DBu-LEMO/E01

Wireless Designer Software
Download the Wireless Designer software installer from the web site under the SUPPORT tab at:
https://www.lectrosonics.com/wireless-designer.html
Note: If Wireless Designer is already installed, you must uninstall it before attempting to install a new copy. Also review the Revision History to determine whether or not an update is relevant for you.
Firmware Update Instructions
Firmware updates are made with a Wireless Designer file downloaded from the web site, and the DBu-LEMO connected via USB. The USB port on the transmitter requires a micro-B male plug on the connecting cable. The other end of the cable would normally be a USB A-Type male connector to fit the most common type of USB jack used on computers.

Specifications

Operating Frequencies:
Frequency Selection Steps: RF Power output: Frequency Stability: Digital Modulation: Equivalent input noise: Input level:
Input impedance:
Input limiter: Gain control range: Modulation indicators:
Controls:
Audio Input Jack: Antenna: Battery: Battery Life: Weight:
Dimensions: Emission Designator:

DBu-LEMO: DBu-LEMO/E01:

470.100 – 607.950 MHz 470.100 – 691.175 MHz

25 kHz
Selectable; 10, 25 or 50 mW
± 0.002%
8PSK
128 dBV
Nominal 2 mV to 300 mV, before limiting Greater than 1V maximum, with limiting.
· Mic: 300 Ohm · Line: 2k Ohm
Dual envelope type; 30 dB range
52 dB in 1 dB steps; digital control
· Dual bicolor LEDs indicate modulation of -20, -10, 0 and +10 dB referenced to full modulation
· LCD bar graph
· Top panel toggle switch; programmable as power, mute or none (off) function
· Side panel membrane switches with LCD interface for power on/off and all setup and configuration controls
LEMO 00 Series 3-pin
Galvanized steel, flexible wire
Two AA Duracell Ultra recommended
4.5 hours; Duracell Ultra alkaline
6.24 ounces (177 grams), including two AA batteries and wire belt clip
3.2 x 2.5 x .74 in. (86 x 62 x 19 mm)
170KG1E

Specifications subject to change without notice.

USB Port
Refer to Help in Wireless Designer software for the procedure.

For body worn operation, this transmitter model has been tested and meets the FCC RF exposure guidelines when used with the Lectrosonics accessories supplied or designated for this product. Use of other accessories may not ensure compliance with FCC RF exposure guidelines. Contact Lectrosonics if you have any questions or need more information about RF exposure using this product..
This device complies with FCC radiation exposure limits as set forth for an uncontrolled environment. This device should be installed and operated so that its antenna(s) are not co-located or operating in conjunction with any other antenna or transmitter.
This device complies with ISED Canada radiation exposure limits as set forth for a controlled “professional” use only.
Cet appareil est conforme avec les normes d’Industrie Canada concernant les limites d’exposition aux radiations pour un usage professionnel contrôlé seulement.

LECTROSONICS, INC.

Digital Belt-Pack Transmitter

Troubleshooting
Symptom:

It is important that you follow these steps in the sequence
Possible Cause:

Transmitter Battery LED off when Power Switch “ON”

1. Batteries are inserted incorrectly. 2. Batteries are low or dead.

No Transmitter Modulation LEDs when Signal Should be Present

1. Gain control turned all the way down. 2. Batteries are inserted incorrectly. Check power LED. 3. Mic capsule is damaged or malfunctioning. 4. Mic cable damaged or miswired. 5. Instrument Cable damaged or not plugged in. 6. Musical instrument output level set too low.

Receiver Indicates RF But No Audio

1. Audio source or cable connected to transmitter is defective. Try using an alternate source or cable.
2. Make sure the compatibility mode is the same on transmitter and receiver.
3. Ensure musical instrument volume control is not set to minimum.

Receiver RF Indicator Off

1. Ensure that the transmitter and receiver are set to the same frequency, and that the hex code matches.
2. Transmitter not turned on, or battery is dead. 3. Receiver antenna missing or improperly positioned. 4. Operating distance is too great. 5. Transmitter may be set to the Standby Mode. See page 8.

No Sound (Or Low Sound Level), Receiver Indicates Proper Audio Modulation

1. Receiver output level set too low. 2. Receiver output is disconnected; cable is defective or miswired. 3. Sound system or recorder input is turned down.

Distorted Sound

1. Transmitter gain (audio level) is too high. Check Modulation LEDs on transmitter and receiver while distortion is being heard.
2. Receiver output level may be mismatched with the sound system or recorder input. Adjust output level on receiver to the correct level for the recorder, mixer or sound system.
3. RF interference. Reset both transmitter and receiver to a clear channel. Use scanning function on receiver if available.

Wind Noise or Breath “Pops'”

1. Reposition microphone, or use a larger windscreen, or both.
2. Omni-directional mics produce less wind noise and breath pops than directional types.

Hiss and Noise — Audible Dropouts

1. Transmitter gain (audio level) far too low. 2. Receiver antenna missing or obstructed. 3. Operating distance too great. 4. RF interference. Reset both transmitter and receiver to a
clear channel. Use scanning function on receiver if available. 5. Musical instrument output set too low. 6. Microphone capsule picking up RF noise. See item on page 17
entitled Microphone RF Bypassing.

Excessive Feedback (With Microphone)

1. Transmitter gain (audio level) too high. Check gain adjustment and/or reduce receiver output level.
2. Microphone too close to speaker system.
3. Microphone is too far from user’s mouth.

Rio Rancho, NM

DBu-LEMO, DBu-LEMO/E01

Service and Repair
If your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment needs repair. Make sure you have followed the setup procedure and operating instructions. Check the interconnecting cables and then go through the Troubleshooting section in this manual.
We strongly recommend that you do not try to repair the equipment yourself and do not have the local repair shop attempt anything other than the simplest repair. If the repair is more complicated than a broken wire or loose connection, send the unit to the factory for repair and service. Don’t attempt to adjust any controls inside the units. Once set at the factory, the various controls and trimmers do not drift with age or vibration and never require readjustment. There are no adjustments inside that will make a malfunctioning unit start working.
LECTROSONICS’ Service Department is equipped and staffed to quickly repair your equipment. In warranty repairs are made at no charge in accordance with the terms of the warranty. Out-of-warranty repairs are charged at a modest flat rate plus parts and shipping. Since it takes almost as much time and effort to determine what is wrong as it does to make the repair, there is a charge for an exact quotation. We will be happy to quote approximate charges by phone for out-of-warranty repairs.
Returning Units for Repair
For timely service, please follow the steps below:
A. DO NOT return equipment to the factory for repair without first contacting us by email or by phone. We need to know the nature of the problem, the model number and the serial number of the equipment. We also need a phone number where you can be reached 8 A.M. to 4 P.M. (U.S. Mountain Standard Time).
B. After receiving your request, we will issue you a return authorization number (R.A.). This number will help speed your repair through our receiving and repair departments. The return authorization number must be clearly shown on the outside of the shipping container.
C. Pack the equipment carefully and ship to us, shipping costs prepaid. If necessary, we can provide you with the proper packing materials. UPS is usually the best way to ship the units. Heavy units should be “double-boxed” for safe transport.
D. We also strongly recommend that you insure the equipment, since we cannot be responsible for loss of or damage to equipment that you ship. Of course, we insure the equipment when we ship it back to you.

Lectrosonics USA:
Mailing address: Lectrosonics, Inc. PO Box 15900 Rio Rancho, NM 87174 USA

Shipping address: Lectrosonics, Inc. 561 Laser Rd. NE, Suite 102 Rio Rancho, NM 87124 USA

Telephone: 505-892-4501 800-821-1121 Toll-free 505-892-6243 Fax

Web: www.lectrosonics.com
Lectrosonics Canada: Mailing Address: 720 Spadina Avenue, Suite 600 Toronto, Ontario M5S 2T9

E-mail: sales@lectrosonics.com
service.repair@lectrosonics.com

Telephone: 416-596-2202 877-753-2876 Toll-free (877-7LECTRO) 416-596-6648 Fax

E-mail: Sales: colinb@lectrosonics.com Service: joeb@lectrosonics.com

Self-Help Options for Non-Urgent Concerns
Our Facebook groups and weblists are a wealth of knowledge for user questions and information. Refer to:

Lectrosonics General Facebook Group: https://www.facebook.com/groups/69511015699

D Squared, Venue 2 and Wireless Designer Group: https://www.facebook.com/groups/104052953321109

The Wire Lists: https://lectrosonics.com/the-wire-lists.html
16

LECTROSONICS, INC.

Digital Belt-Pack Transmitter

Rio Rancho, NM

DBu-LEMO, DBu-LEMO/E01

LECTROSONICS, INC.

Digital Belt-Pack Transmitter

Rio Rancho, NM

LIMITED ONE YEAR WARRANTY
The equipment is warranted for one year from date of purchase against defects in materials or workmanship provided it was purchased from an authorized dealer. This warranty does not cover equipment which has been abused or damaged by careless handling or shipping. This warranty does not apply to used or demonstrator equipment.
Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any defective parts without charge for either parts or labor. If Lectrosonics, Inc. cannot correct the defect in your equipment, it will be replaced at no charge with a similar new item. Lectrosonics, Inc. will pay for the cost of returning your equipment to you.
This warranty applies only to items returned to Lectrosonics, Inc. or an authorized dealer, shipping costs prepaid, within one year from the date of purchase.
This Limited Warranty is governed by the laws of the State of New Mexico. It states the entire liablility of Lectrosonics Inc. and the entire remedy of the purchaser for any breach of warranty as outlined above. NEITHER LECTROSONICS, INC. NOR ANYONE INVOLVED IN THE PRODUCTION OR DELIVERY OF THE EQUIPMENT SHALL BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, CONSEQUENTIAL, OR INCIDENTAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THIS EQUIPMENT EVEN IF LECTROSONICS, INC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT SHALL THE LIABILITY OF LECTROSONICS, INC. EXCEED THE PURCHASE PRICE OF ANY DEFECTIVE EQUIPMENT.
This warranty gives you specific legal rights. You may have additional legal rights which vary from state to state.

581 Laser Road NE · Rio Rancho, NM 87124 USA · www.lectrosonics.com +1(505) 892-4501 · fax +1(505) 892-6243 · 800-821-1121 US and Canada · sales@lectrosonics.com

30 August 2022

Documents / Resources

LECTROSONICS DBu-LEMO Digital Belt Pack Transmitter [pdf] Instruction Manual
DBu-LEMO Digital Belt Pack Transmitter, DBu-LEMO, Digital Belt Pack Transmitter, Belt Pack Transmitter, Pack Transmitter, Transmitter

References

User Manual

LECTROSONICS DBu-LEMO Digital Belt Pack Transmitter Instruction Manual

DBu-LEMO Digital Belt Pack Transmitter

Product Information

Specifications:

Product Usage Instructions:

Battery Installation:

Battery Status LED Indicator:

Belt Clips:

IR (infrared) Port:

Audio Input:

Features and Functions:

Operating Instructions:

FAQ:

Q: How do I protect the transmitter from moisture damage?

Documents / Resources

References

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