DCHT, DCHT/E01
LECTROSONICS, INC.
10
Input Menu
Adjusting the Input Gain for Digital Inputs
For 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.
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
-40
-20
0
Gain
25
-40
-20
0
Gain
25
20
2
1
Setup screen in
Linked mode
Setup screen in
Independent mode
3)
If using a microphone, position it 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 source 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.
5)
Turn the recorder or mixer 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 instruc-
tions, and do not change it to adjust the audio
output level of the receiver.
7)
If the audio source drives the inputs into limiting,
the audio level meter will move all the way to the
right and terminate in a small box with an “L” in
it, indicating limiting. If this happens on anything
other than brief peaks, then the audio gain is set
too high.
Selecting the Low Frequency Roll-off
The low frequency audio roll-off is adjustable to op-
timize performance for ambient noise conditions or
personal preference.
Low frequency audio content may be desirable or dis-
tracting, so the point at which the roll-off takes place
can be set at 20, 35, 50, 70, 100, 120 and 150 Hz.
Rolloff
70 Hz
Input...
Gain
Rolloff
StMode
Rolloff
70
Hz
2
1
70
Hz
Setup screen in
Linked mode
Setup screen in
Independent mode
Selecting StMode (stereo mode)
The two channels can be set to
Indep
(independent) or
Linked
. Indep allows the gain to be adjusted separately
on each channel. Linked employs the gain adjustment
to both channels.
StMode
Indep
Linked
Input...
Gain
Rolloff
StMode
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 Analog,
InpCfg1
and
In-
pCfg2
menus are used to configure the audio input for
the respective channels. Use the and arrow but-
tons to select the input type.
Input...
InType
InpCfg1
InpCfg2
InpCfg1
Line In
InpCfg2
Oth Lav
-40
-20
0
Gain
25
L
