Input Gain Adjustment - Lectrosonics DHu Quick Start Manual

Input Gain Adjustment

The two bicolor Modulation LEDs (located at the bottom of the control panel)
are used to accurately adjust the gain. They are upside/down from the keypad
for viewing with the capsule close to your mouth.
DHu
545.400
-40
The audio level is shown by
LEDs and in the LCD screen.
The gain should be set so that
the -20 LED just turns red on
the loudest peak (the onset of
limiting).
The LEDs will glow either red or green to indicate modulation levels as shown
in the following table.
Signal Level
Less than -20 dB
-20 dB to -10 dB
-10 dB to +0 dB
+0 dB to +10 dB
Greater than +10 dB
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, which could
cause feedback.
1) With fresh batteries in the transmitter, power the unit on into "standby"
mode (RF output off)
2) Press the MENU/SEL button once to enter the setup menu. Use the UP/
DOWN buttons to select Gain. Press the MENU/SEL button again to
enter the setup screen.
3) Hold the microphone the way it will be used in actual operation.
4) Speak or sing at the same voice level that will actually be used during the
program, while observing the modulation LEDs. Use the UP/DOWN but-
tons to adjust the gain until the –20 dB LED starts to flicker red and the
–10 dB glows green.
5) Once the audio gain has been set, the signal can be sent through the
sound system for overall level adjustments, monitor settings, etc. To do
this, the unit must be set to transmit (see Powering On and Off, and the
Standby Mode).
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-20 0
-20 LED
Off
Green
Green
Red
Red
-10 LED
Off
Off
Green
Green
Red
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