Lectrosonics DCHT Series User manual

Quick
Start
Guide
Fill in for your records:
Serial Number:
Purchase Date:
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
7 November 2019
U.S. Patent 7,225,135
DCHT
Digital Transmitter
DCHT, DCHT/01
This guide is for all 1.1X
versions of DCHT Firmware.

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 un-
less 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 mid-point
of the runtime. When the LED be-
gins 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 atten-
tion, 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 at-
tached 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 avail-
able. IR Sync will transfer the set-
tings 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 compen-
sates 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 us-
ing the battery timer function avail-
able 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 hous-
ing.
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 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 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 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 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.
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 cur-
rent 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 function
is set for MUTE, the Main Window
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
LCD
Menu
Map
Input... SEL
BACK
SEL
BACK
Freq.
Xmit...
470.675
Press MENU/SEL to highlight MHz or kHz
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
Compat
Rf On?
SEL
BACK
SEL
BACK
Name...
Flex...
Name...
NameTx
NameCh1
NameCh2
Flex...
SendTx
SendCh1
SendCh2
NameTx
SEL
BACK Press MENU/SEL to confirm and move cursor to next
position; 8 characters available
Select character with arrow buttons
SEL
BACK
SendTx
Sync
Select option with arrow buttons:
SendTx, SendCh1, SendCh2,
SendM12
SEL
BACK
SEL
BACK
GetAll
SendAll
GetAll
Sync Press UP arrow button to begin sync
SendAll
Sync Press UP arrow button to begin sync
GetFrq
SEL
BACK
M2R... 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
SEL
BACK
Compat
Duet
DCH(X)
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
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

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
BatType SEL
BACK
BatType
Alk.
Lith.
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
Key... KeyType SEL
BACK
KeyType
Shared
SEL
BACK
MakeKey
WipeKey SEL
BACK
WipeKey?
SEL
BACK
SendKey SendKey
Sync Press UP arrow button to begin sync
No
Yes
MakeKey
No
Yes
Select option with arrow buttons
Select option with arrow buttons
Select option with arrow buttons:
Shared, Standard, Volatile,
Universal
No
Yes
Enable
Ignore
Yes
No
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.

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 de-
sired 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 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 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 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 previ-
ous 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 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.

www.lectrosonics.com 9
5) Turn the recorder or sound sys-
tem 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 au-
dio 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...
InType
InpCfg1
InpCfg2
InType
Analog
AES
Selecting Input Configuration
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
Compat
Freq.
494.500
Freq.
494.500
Press the MENU/SEL button to
select each field. Use the and
arrow buttons to adjust the frequen-
cy. 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 perform-
er’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 trouble-
shooting 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 per-
former’s name, (or whatever name
the user chooses for the DCHT,
DCHT/E01), frequency, mixer set-
tings and limiter settings.
NOTE: The GetAll 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
copied settings are available on the
DCHT, DCHT/E01.
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 con-
venient encryption option avail-
able. All encryption-capable
Lectrosonics transmitters and
receivers contain the Universal
Key. The key does not have
to be generated by the DCHT.
Simply set a Lectrosonics
encryption-capable receiver
and the DCHT to Universal,
and the encryption is in place.
This allows for convenient
encryption amongst multiple
transmitters 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.