User Guide for LECTROSONICS models including: DCHT, DCHT-E01, DCHT-B1C1, DCHT-E01-B1C1, DCHT-E01 DCHT Digital Transmitter, DCHT-E01, DCHT Digital Transmitter, Digital Transmitter, Transmitter

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Quick Start Guides – Lectrosonics

DCHT QUICK START GUIDE

DCHT – Lectrosonics

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QSG DCHT ALL
Quick Start Guide
DCHT
Digital Transmitter
DCHT, DCHT/E01, DCHT-B1C1, DCHT/E01-B1C1

Fill in for your records: Serial Number:
Purchase Date:

U.S. Patent 7,225,135
This guide is intended to assist with initial setup and operation of your Lectrosonics product.
For a detailed user manual, download the most current version at:
www.lectrosonics.com
23 January 2024

Features and Functions

Battery status LED Enter menu/ Select item
Return to previous screen

Status Ready LED Menu navigation
Power

Programmable function switch

Bi-directional IR port

Audio input jack

Modulation indicators*

Antenna port USB Port

2

LECTROSONICS, INC.

Battery Status LED Indicator
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.
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 at a midpoint of the runtime. When the LED begins to blink red, there will be only a few minutes of operation remaining.
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.

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.

Status LED
Blue LED indicates ready status.

Remote Function
In the Setup Menu, choose to turn remote function on/off. The "dweedle tone" remote control is turned on or off with the Remote Menu, setting the transmitter to react to tones received (Enable) or to Ignore the tones.

Setup... AutoOn? ProgSw Remote

Remote
Enable Ignore

NOTE: Remote control of settings is enabled using a third party smart phone app named DCHTRemote, published by New Endian, LLC.

www.lectrosonics.com

3

Battery Installation
The transmitter is powered by two AA batteries. Lithium batteries are recommended for longest life.
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.

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.
Spring contacts

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 outward, then lift up 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

Optional Battery Eliminator
The transmitter can be powered by external DC using the optional LTBATELIM power supply adapter.

Powering On/Off
Powering On in Operating Mode
Press and hold the Power Button briefly until a bar on the LCD
finishes.
When you release the button, the unit will be operational with the RF output turned on and the Main Window displayed.

Hold for Rf On

DCHT
MUTE
470.100

-40

-20 +0

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LECTROSONICS, INC.

Powering On in Standby Mode

A brief press of the power button ,

and releasing it before the progress

bar finishes, will turn the unit on with

the RF output turned off. In this

Standby Mode the menus can be

browsed to make settings and

adjustments without the risk of

interfering with other wireless

systems nearby.

Hold for Rf On

RF indicator

Release

blinks

Power Button DCHT

before the bar

progresses to enter Standby

470.100

Mode

-40

-20 +0

NOTE: After settings and adjustments are made, press the power button again to turn the unit off or navigate to menu item Xmit, RFOn? to choose to begin transmitting.

Powering Off

Powering O ...

To turn the unit off, hold the Power Button in briefly

and wait for the

progress bar to

finish, or use 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 progress bar finishes, 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.

Screen Details
Entering the Main Menu
The LCD and keypad interface makes it easy to browse the menus and make the selections
www.lectrosonics.com

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.

Input... Gain Rolloff StMode

Gain

25

-40

-20

0

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 the

current settings, status, audio

level and battery status.

Programmable Switch Function

DCHT
MUTE

Operating mode

470.100

Frequency -40 -20 +0 (MHz)

Battery status

Audio level

If the programmable switch func-

tion is set for MUTE, the Main Window will indicate that the function

is enabled.

DCHT

Mute function MUTE

enabled but not active

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.

Mute function

DCHT

enabled and MUTE

active

470.100

Main Window will blink the word
MUTE when the audio is

<­MUTE­> muted

5

LCD Menu Map

Input...

SEL BACK

Gain 12
20 22

SEL button to select channel (gain value highlighted)

Gain 1 2
20 22

Use arrow buttons to select value
Level meter at bottom of screen

Rolloff

SEL BACK

Rolloff 12
70 70 Hz Hz

Select value with arrow buttons

StMode

SEL BACK

StMode
Indep. Linked

Select option with arrow buttons

InType

SEL BACK

InType
Analog AES

Select option with arrow buttons

InpCfg1

SEL

InpCfg1 Line In

BACK

Select setting with arrow buttons: PSA, DPA, B6, COS-11, MKE 2, M152, Oth Lav, Custom, Line In, Dynamic

InpCfg2

SEL

InpCfg2 Oth Lav

BACK

Select setting with arrow buttons: PSA, DPA, B6, COS-11, MKE 2, M152, Oth Lav, Custom, Line In, Dynamic

Xmit...

SEL

Freq.

BACK 470.675
Grp 1

Press MENU/SEL to highlight MHz or kHz or to select a Frequency Group Select value with arrow buttons

Txpower

SEL BACK

TxPower
10 mW 25 mW 50 mW

Select option with arrow buttons

Rf On?

SEL BACK

Rf On?
Yes No

Select option with arrow buttons

Compat

SEL

Compat

BACK Duet
DCHX

Select option with arrow buttons

IR&Key

SEL BACK

SendFrq

SEL

SendFreq

BACK Sync

Press UP arrow button to begin sync

Settings will be stored when the BACK button is pressed.

SendAll

SEL

SendAll

BACK
Sync

Press UP arrow button to begin sync

GetFrq

SEL

GetFreq.

BACK Sync

Press UP arrow button to begin sync

GetAll

SEL

GetAll

BACK
Sync

Press UP arrow button to begin sync

KeyType

SEL BACK

KeyType Select option with arrow buttons: Shared, Standard, Volatile,
Shared Universal

NOTE: When StMode is set to Linked, a single gain value field will be shown

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LECTROSONICS, INC.

NOTE: The key menu selections only show when DCH(X) compatibility mode (encryption) is selected.

About

SEL

About

BACK

SEL BACK

About DCHT
v1.10 /1.10

Flex... Setup...

Make Key

SEL BACK

WipeKey

WipeKey? Select option

SEL

with arrow

BACK

No buttons
Yes

SendKey

SEL

SendKey

BACK Sync

Press UP arrow button to begin sync

SEL

Flex... SendTx

BACK

SendCh1 SendCh2

Select option with arrow buttons: SendTx, SendCh1, SendCh2, SendM12, NameTx, NameCh1, NameCh2

SEL

SendTx

BACK
Sync

SEL

SEL

AutoOn?

BACK

BACK

AutoOn?
No Yes

Select option with arrow buttons

Flex...

SEL

ProgSw Select option with arrow buttons:

ProgSw

BACK

Mute (none), TalkBk, Power, Mute

Remote

SEL Remote
BACK

Enable Select option with arrow buttons
Ignore

Setup...

NOTE:

Make,

Wipe and

Send Key

Menu

options

are only

avaMialkaebleSEL in SKehyaredB,ACK

Standard

and

Volatile Key SendKey SEL Types. BACK

They will

not be

SEBLACKdimnFiSSSseleeeetxnnnpnh.ddd..TCCluexhha12yifeSSSNdeeealnnmeddceTMtCxo1h,p22St,i Universal

Key Type

SEL is choseSEnL.

AutoOn?

BACK

BACK

SEL BatType
BACK

BatType
Alk. Lith.

Select option with arrow buttons

NameTx SEL BACK
SEL Locked?
BACK

NameTx
Locked? Yes No

Select character with arrow buttons
Press MENU/SEL to confirm and move cursor to next position; 8 characters available
Select option with arrow buttons

Backlit

SEL BACK

Backlit
On 30 sec
5 sec

Select option with arrow buttons

LEDs

SEL

LED Off BACK

On Off

Select option with arrow buttons

SEL ProgSw
BACK SEL Remote
BACK SEL BatType
BACK NameTx SEL
BACK SEL Locked?
BACK

Default

SEL BACK

Default Settings
No
Yes

Select option with arrow buttons

SEL Backlit
BACK SEL LED Off
BACK

About

SEL

About

BACK

SEL BACK

About DCHT
v1.10 /1.10

SEL Default
BACK

www.lectrosonics.com

7

Quick Start
1) Install good batteries and turn power on (see page 4).
2) Set compatibility mode to match the receiver (see page 8).
3) Connect signal source, select input type and adjust input gain for optimum modulation level (see pages 8 and 9).
4) Set or sync frequency to match receiver (see page 9). Also see receiver manual for scanning procedure.
5) Set encryption key type and sync with receiver (see pages 10 and 11).
6) Set programmable switch to desired function (see page 11).
7) Verify RF and audio signals are present at the receiver (see receiver manual).
Xmit Menu
Selecting Receiver Compatibility Mode
The transmitter can be set to operate with different receivers:
Duet: M2R digital IEM/IFB receiver
DCH(X): M2R-X encrypted (FW v3.x)
Input Menu
Adjusting the Input Gain for Analog Inputs
For analog gain adjustment, two multi-color LEDs on the top panel, one for each channel, 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

CH1

Less than -20 dB Off

-20 dB to +0 dB

Green

+0 dB and greater Red

CH2 Off Green Green

NOTE: This procedure is used for analog inputs only. AES digital input is factory set at the industry standard level. The LEDs on the top panel will glow blue when the audio level reaches about -40 FS.
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).
2) Navigate to the Gain setup screen.

Input... Gain Rolloff StMode

Gain

25

-40

-20

0

Setup screen in
Linked mode

Gain 12
20 25

-40

-20

0

Setup screen in Independent
mode

3) 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 audio device to the maximum level that will be used.
4) Use the and arrow buttons to adjust the gain until the LED glows green most or all of the time, and flicker red during the loudest peaks.

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LECTROSONICS, INC.

5) Turn the recorder or sound system gain down before setting the transmitter to the normal operating mode and enabling the audio output.
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.
Selecting Input Type
AES digital or analog audio input is selected with the InType menu item. With the AES selected, there are no additional settings needed for the input. Analog input configuration is set with the InpCfg1 and InpCfg2 menu items.

Input... I n Ty p e InpCfg1 InpCfg2

I n Ty p e
Analog AES

Selecting Input Configuration
When the input type is set to Analog, InpCfg1 and InpCfg2 menus are used to configure the audio input for the respective channels. Use the and arrow buttons to select the input type.

Input... I n Ty p e InpCfg1 InpCfg2

InpCfg1 InpCfg2 Line In Oth Lav

The Custom option opens a setup screen that provides a variety of settings. Press SEL to select the custom setup item, then press the
and arrow buttons to adjust the setting.

InpCfg2 Custom MicLoZ
0V Neg

Channel select Input impedance Bias voltage Audio polarity

Available settings:
Input impedance (Z): LOW, MID, HIGH Bias voltage: 0V, 2V, 4V Audio polarity: + (pos.), ­ (neg.)

Xmit Menu

Selecting Frequency
The setup screen for frequency selection offers multiple ways to browse the available frequencies.

Xmit... Freq TxPower Rf On?

Freq. 494.500
Grp 4

Freq. 494.500
Grp 4

Press the MENU/SEL button to select each field. Use the and
arrow buttons to adjust the frequency. Each field will step through the available frequencies in a different increment.

NOTE: When the frequency is highlighted, hold down the MENU/SEL button to increase or decrease frequency in higher increments.

www.lectrosonics.com

9

M2R Menu
Selecting M2R Receiver Functions
The M2R Receiver includes a FlexListTM mode where up to 16 mixes can be accessed by name. This feature enables a user to quickly find and listen to any of the performer's mixes on the stage. The mix includes the name, frequency, mixer settings and limiter settings. The mix is easily shared via the M2R IR port, added to the list of 16 mixes and stored until cleared by the user. The M2R allows the user to toggle between the mixes, making troubleshooting issues easy and efficient.
The DCHT, DCHT/E01's M2R functions create an easy interface with the FlexList feature. The following options are available:

SendAll
Sync to send all available settings to the M2R transmitter via the IR port, including the performer's name, (or whatever name the user chooses for the DCHT, DCHT/ E01), frequency, mixer settings and limiter settings.
NOTE: The SendAll function is designed for trouble shooting and allows for settings to be cloned to transfer to another receiver if there is a problem to be identified. Not all settings are available on the DCHT, DCHT/E01.

GetAll Sync

SendAll Sync

Press the arrow button to begin sync

Key Menu

GetFrq

Encryption Key Management

Sync to receive (get) frequency from the M2R transmitter via the IR port

KeyType
The DCHT has four options for encryption keys:

SendFrq

· Universal: This is the most

Sync to send frequency to the

convenient encryption option

M2R transmitter via the IR port

available. All encryption-ca-

GetFrq

SendFrq

Press the arrow button

pable Lectrosonics transmitters and receivers contain the Universal Key. The key does

to begin sync

not have to be generated by

Sync

Sync

the DCHT. Simply set a Lec-

trosonics encryption-capable

GetAll

receiver and the DCHT to Universal, and the encryp-

Sync to receive (get) all available

tion is in place. This allows

settings from the M2R transmitter

for convenient encryption

via the IR port, including the performer's name, (or whatever name the user chooses for the

amongst multiple transmitters and receivers, but not as secure as creating a unique

DCHT, DCHT/E01), frequency, mixer

key.

settings and limiter settings.
NOTE: The GetAll function is designed for troubleshooting and allows for settings to be cloned to transfer to another receiver if there is a problem to be identified. Not all copied settings

NOTE: When the DCHT is set to Universal Encryption Key, Make Key, Wipe Key and Share Key will not
appear in the menu.

are available on the DCHT, DCHT/E01.

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LECTROSONICS, INC.

· Shared: There are an unlimited number of shared keys available. Once generated by the DCHT and transferred to an encryption capable receiver, the encryption key is available to be shared (synced) by the receiver with other encryption capable transmitters/receivers via the IR port.
· Standard: Standard Keys are unique to the DCHT. The transmitter generates the Standard Key. The DCHT is the sole source of the Standard Key, and because of this, the DCHT may not receive (get) any Standard Keys.
· Volatile: This one-time only key is the highest level of encryption security. The Volatile Key exists only as long as the power in both the DCHT Transmitter and an encryption capable receiver remains on during a single session. If the receiver is powered off, but the DCHT has remained turned on, the Volatile Key must be sent to the receiver again. If the power is turned off on the DCHT, the entire session concludes and a new Volatile Key must be generated by the transmitter and sent to the receiver via the IR port.
MakeKey
When the transmitter key type is set to Volatile, Standard or Shared, use this menu item to create a key that can be synced with an encryption capable receiver.
WipeKey
This menu item is only available if there is a Key Type currently on the DCHT that can be deleted.
www.lectrosonics.com

Select Yes to wipe the current key and enable the DCHT to create a new key.
SendKey
This menu item is only available if Key Type is set to Volatile, Standard or Shared, and a new key has been created. Press Menu/Sel to sync the Encryption key to another transmitter or receiver via the IR port.

Ke y. . . MakeKey WipeKey SendKey

SendKey Send

Setup Menu
Selecting 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 blink a message and -10 LED will glow solid red
· Power - turns the power on and off
· TalkBk - redirects the audio to a different output channel on the receiver (only available in DCH(X) compatibility mode)

Setup... AutoOn? ProgSw Remote

Press the

ProgSw

and

arrow buttons

Mute to select

the desired

function or

disable the

switch

NOTE: The programmable switch will continue to operate whether or not keypad changes are locked.

11

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.


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