GAI-Tronics DHS-201 Digital Intercom Stations - Manual (Page 16)

Pub. 42004-453C
M ODEL DHS/DHF 200 S ERIES D IGITAL I NTERCOM S TATIONS Page 14 of 25
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Handset Receiver Volume
Potentiometer R73 has been provided for individual adjustment of the handset receiver volume. To
increase the handset volume, rotate R73 (HNDST VOL) clockwise. To decrease the volume, rotate R73
counterclockwise.
Unit Speaker Level
Potentiometer R75 has been provided for individual adjustment of the unit speaker volume. To increase
the speaker volume, rotate R75 (UNIT SPKR VOL) clockwise. To decrease the volume, rotate R75
counterclockwise.
Headset Receiver Level
Potentiometer R79 has been provided for individual adjustment of the headset receiver volume. To
increase the headset volume, rotate R79 (HDST VOL) clockwise. To decrease the volume, rotate R79
counterclockwise.
AGC (Automatic Gain Control)
This station is equipped with an automatic gain control circuit in order to minimize level changes on the
audio line and the external speaker. The master volume control (keypad) affects the audio level received
by this station. The master volume control enables the handset, headset, and unit speaker levels to be
controlled via the keypad, but it also affects the audio level supplied to the audio line and external
speaker; therefore, an automatic gain control circuit has been added. This adjustment has been factory set
and should only be performed by certified Field Service Personnel.
AGC Bypass
If necessary, the AGC circuitry can be bypassed. To bypass the AGC, move the jumpers on P8 and P9
from IN to the OUT position.
N OTE : The following adjustments should only be performed after the Intercom Level Setting RM has
been set (factory setting), the Master Volume Adjustment (keypad control) has been set to mid-range, and
the AGC has been set.