GAI-Tronics ACC2500 Audio Control Center - Manual (Page 28)

Installation ACC2500 Audio Control Center
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Microphone Sensitivity Adjustments
After connections have been made, the ACC2500 must be configured for transmit and receive audio levels.
These adjustments are made using the front panel buttons. The microphone sensitivity adjustment is used
to compensate for different user voice levels and varied acoustical conditions. Refer to the following
instructions to adjust the different microphones.
Internal Microphone Sensitivity
1. Place the handset in the cradle.
2. While holding down TIME button, momentarily press VOLUME Up button (
∆) to enable microphone
sensitivity adjustment. By default, this adjustment is disabled and must be enabled after each reset.
The display will indicate the current microphone level on the display for approximately 2 seconds.
3. Press and hold TRANSMIT , speak into the internal microphone, and press VOLUME Up or VOLUME
Down to increase sensitivity or decrease microphone sensitivity. N OTE : The display shows the
relative TX level as a number between 1 and 5. To confirm the absolute level, measure the transmit
level across the TX line pair using an ac millivolt meter or dBm meter.
4. After the adjustment has been made, press and hold the IC button, and momentarily press the VOLUME
Down button. A single beep is heard to indicate the microphone sensitivity adjustment function has
been disabled.
Handset Microphone Sensitivity
1. With the handset off-hook, while holding down TIME button, momentarily press VOLUME Up button
(
∆) to enable microphone sensitivity adjustment. By default, this adjustment is disabled and must be
enabled after each reset. The display will indicate the current microphone level on the display for
approximately 2 seconds.
2. To adjust the sensitivity level, press the handset PTT button, speak into the handset microphone, and
press VOLUME Up or VOLUME Down to increase or decrease the sensitivity level.
3. After the adjustment has been made, press and hold the TIME button, and momentarily press the
VOLUME Down button. A single beep is heard to indicate the microphone sensitivity adjustment
function has been disabled.
N OTE : When an XAAB001A is used to connect other accessories, the handset microphone sensitivity
adjustment is used for those devices.