Lectronics DCHT User manual

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This guide is intended to assist
with initial setup and operation of
your Lectrosonics product.
For a detailed user manual, down-
load the most current
version at:
www.lectrosonics.com
Quick
Start
Guide
23 January 2024
U.S. Patent 7,225,135
DCHT
Digital Transmitter
DCHT, DCHT/E01, DCHT-B1C1,
DCHT/E01-B1C1

LECTROSONICS, INC.2
Features and Functions
Battery
status LED
Status Ready LED
Return to
previous screen
Enter menu/
Select item
Menu navigation
Power
USB Port
Modulation
indicators*
Programmable
function switch
Audio
input
jack
Antenna
port
Bi-directional IR port

www.lectrosonics.com 3
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 batter-
ies 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 mid-
point 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 trans-
mitter 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 bat-
tery 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.

LECTROSONICS, INC.4
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.
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 com-
partment 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 incor-
rectly, 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.
Spring contacts
Optional Battery Eliminator
The transmitter can be powered
by external DC using the op-
tional LTBATELIM power supply
adapter.
Powering On/O
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 470.100
-40 -20 +0
DCHT
MUTE

www.lectrosonics.com 5
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
Release
Power Button
before the bar
progresses to
enter Standby
Mode
RF indicator
blinks
470.100
-40 -20 +0
DCHT
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 O
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
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 but-
tons to select the menu item. Then
press the MENU/SEL button to
enter the setup screen.
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.
-40 -20 0
Gain
25
Input...
Gain
Rolloff
StMode
Main Window Indicators
The Main Window displays the
current settings, status, audio
level and battery status.
470.100
-40 -20 +0
DCHT
MUTE
Frequency
(MHz)
Operating
mode
Battery
status
Audio level
Programmable
Switch
Function
If the programmable switch func-
tion is set for MUTE, the Main Win-
dow will indicate that the function
is enabled.
470.100
-40 -20 +0
DCHT
MUTE
Mute function
enabled but
not active
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.
470.100
DCHT
MUTE
<–MUTE–>
Main Window
will blink
the word
MUTE when
the audio is
muted
Mute
function
enabled and
active

LECTROSONICS, INC.6
Settings will
be stored
when
the BACK
button
is pressed.
NOTE: When
StMode is set
to Linked, a
single gain
value field will
be shown
Input... SEL
BACK
SEL
BACK
Freq.
Xmit... 470.675
Press MENU/SEL to highlight MHz or kHz or to
select a Frequency Group
Select value with arrow buttons
Rolloff
StMode
InType
InpCfg1
InpCfg2
SEL
BACK
Rolloff
Select value with arrow buttons
SEL
BACK Indep.
Linked
StMode
Select option with arrow buttons
SEL
BACK Analog
AES
InType
Select option with arrow buttons
SEL
BACK
InpCfg1
Line In
SEL
BACK
InpCfg2
Oth Lav
Txpower
Rf On?
SEL
BACK
GetAll
GetAll
Sync Press UP arrow button to begin sync
SEL
BACK
SendAll SendAll
Sync Press UP arrow button to begin sync
SEL
BACK
IR&Key
GetFrq SEL
BACK
GetFreq.
Sync Press UP arrow button to begin sync
SEL
BACK
SendFrq SendFreq
Sync Press UP arrow button to begin sync
SEL
BACK
TxPower
Select option with arrow buttons
10 mW
25 mW
50 mW
Compat SEL
BACK
Compat
Duet
DCHX
Select option with arrow buttons
SEL
BACK
Rf On?
Yes
No
Select option with arrow buttons
Use arrow buttons
to select value
22
Gain
Level meter at bottom of screen
20
2
1
SEL button to
select channel
(gain value
highlighted)
Gain
2220
2
1
7070
2
1
Hz Hz
Select setting with arrow
buttons: PSA, DPA, B6,
COS-11, MKE 2, M152, Oth
Lav, Custom, Line In, Dynamic
Select setting with arrow
buttons: PSA, DPA, B6,
COS-11, MKE 2, M152, Oth
Lav, Custom, Line In, Dynamic
KeyType SEL
BACK
KeyType
Shared
Select option with arrow buttons:
Shared, Standard, Vo latile,
Universal
Grp 1
LCD Menu Map

www.lectrosonics.com 7
SEL
BACK
Setup...
SEL
BACK
ProgSw
AutoOn? SEL
BACK
AutoOn?
Select option with arrow buttons
ProgSw
Mute
Select option with arrow buttons:
(none), TalkBk, Power, Mute
Remote SEL
BACK
Remote
Select option with arrow buttons
SEL
BACK
Locked?
Locked?
Select option with arrow buttons
Backlit SEL
BACK Select option with arrow buttons
Backlit
On
30 sec
5 sec
SEL
BACK
LED Off Select option with arrow buttons
SEL
BACK
Default
Default
Settings
No
Yes
Select option with arrow buttons
LEDs
On
Off
SEL
BACK
About About SEL
BACK
About
DCHT
v1.10
/1.10
SEL
BACK
Make
Key
SEL
BACK
SendKey SendKey
Sync
Press UP arrow button to begin sync
WipeKey
SEL
BACK
WipeKey?
No
Yes
Select option
with arrow
buttons
No
Yes
Enable
Ignore
Yes
No
SEL
BACK
NameTx NameTx
Press MENU/SEL to confirm
and move cursor to next
position; 8 characters available
Select character with
arrow buttons
SEL
BACK
Flex...
Flex...
SendTx
SendCh1
SendCh2
SEL
BACK
SendTx
Sync
Select option with arrow buttons:
SendTx, SendCh1, SendCh2,
SendM12, NameTx, NameCh1,
NameCh2
BatType SEL
BACK
BatType
Alk.
Lith.
Select option with arrow buttons
NOTE: The key
menu selections
only show
when DCH(X)
compatibility
mode
(encryption) is
selected.
NOTE:
Make,
Wipe and
Send Key
Menu
options
are only
available
in Shared,
Standard
and
Volatile
Key
Types.
They will
not be
displayed
in the
menu if
Universal
Key Type
is chosen.
SEL
BACK
Setup...
SEL
BACK
ProgSw
AutoOn? SEL
BACK
AutoOn?
Select option with arrow buttons
ProgSw
Mute
Select option with arrow buttons:
(none), TalkBk, Power, Mute
Remote SEL
BACK
Remote
Select option with arrow buttons
SEL
BACK
Locked?
Locked?
Select option with arrow buttons
Backlit SEL
BACK Select option with arrow buttons
Backlit
On
30 sec
5 sec
SEL
BACK
LED Off Select option with arrow buttons
SEL
BACK
Default
Default
Settings
No
Yes
Select option with arrow buttons
LEDs
On
Off
SEL
BACK
About About SEL
BACK
About
DCHT
v1.10
/1.10
SEL
BACK
Make
Key
SEL
BACK
SendKey SendKey
Sync
Press UP arrow button to begin sync
WipeKey
SEL
BACK
WipeKey?
No
Yes
Select option
with arrow
buttons
No
Yes
Enable
Ignore
Yes
No
SEL
BACK
NameTx NameTx
Press MENU/SEL to confirm
and move cursor to next
position; 8 characters available
Select character with
arrow buttons
SEL
BACK
Flex...
Flex...
SendTx
SendCh1
SendCh2
SEL
BACK
SendTx
Sync
Select option with arrow buttons:
SendTx, SendCh1, SendCh2,
SendM12, NameTx, NameCh1,
NameCh2
BatType SEL
BACK
BatType
Alk.
Lith.
Select option with arrow buttons

LECTROSONICS, INC.8
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 oper-
ate with different receivers:
Duet: M2R digital IEM/IFB re-
ceiver
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 vi-
sual 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 CH2
Less than -20 dB Off Off
-20 dB to +0 dB Green Green
+0 dB and greater Red 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 follow-
ing 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 -40 -20 0
Gain
25
-40 -20 0
Gain
25
20
21
Setup
screen in
Linked
mode
Setup
screen in
Independent
mode
3) Position a microphone the way
it will be used in actual opera-
tion 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.

www.lectrosonics.com 9
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 adjust-
ment 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 con-
figuration is set with the InpCfg1
and InpCfg2 menu items.
Input...
InType
InpCfg1
InpCfg2
InType
Analog
AES
Selecting Input
Conguration
When the input type is set to Ana-
log, 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...
InType
InpCfg1
InpCfg2
InpCfg1
Line In
InpCfg2
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.

LECTROSONICS, INC.10
M2R Menu
Selecting M2R Receiver
Functions
The M2R Receiver includes a Flex-
List™ 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 per-
former’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 func-
tions create an easy interface with
the FlexList feature. The following
options are available:
GetFrq
Sync to receive (get) frequency
from the M2R transmitter via the
IR port
SendFrq
Sync to send frequency to the
M2R transmitter via the IR port
GetFrq
Sync
SendFrq
Sync
Press the
arrow button
to begin sync
GetAll
Sync to receive (get) all available
settings from 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.
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.
Press the
arrow button
to begin sync
GetAll
Sync
SendAll
Sync
Key Menu
Encryption Key Management
KeyType
The DCHT has four options for
encryption keys:
• Universal: This is the most
convenient encryption option
available. All encryption-ca-
pable Lectrosonics transmit-
ters and receivers contain the
Universal Key. The key does
not have to be generated by
the DCHT. Simply set a Lec-
trosonics encryption-capable
receiver and the DCHT to
Universal, and the encryp-
tion is in place. This allows
for convenient encryption
amongst multiple transmit-
ters and receivers, but not as
secure as creating a unique
key.
NOTE: When the DCHT is
set to Universal Encryption
Key, Make Key, Wipe Key
and Share Key will not
appear in the menu.
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
are available on the DCHT, DCHT/E01.

www.lectrosonics.com 11
• Shared: There are an unlimited
number of shared keys avail-
able. Once generated by the
DCHT and transferred to an
encryption capable receiver,
the encryption key is avail-
able to be shared (synced)
by the receiver with other
encryption capable transmit-
ters/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 en-
cryption security. The Volatile
Key exists only as long as
the power in both the DCHT
Transmitter and an encryp-
tion 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 gener-
ated 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 cre-
ate 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.
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, Stan-
dard 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.
Key...
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 func-
tions:
• (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)
ProgSw
Mute
Setup...
AutoOn?
ProgSw
Remote
NOTE: The programmable
switch will continue to
operate whether or not
keypad changes are locked.
Press the
and
arrow buttons
to select
the desired
function or
disable the
switch

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.