GAI-Tronics DHS-201 Digital Intercom Stations - Manual (Page 17)

Pub. 42004-453C
M ODEL DHS/DHF 200 S ERIES D IGITAL I NTERCOM S TATIONS Page 15 of 25
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External Speaker Volume Control
A speaker amplifier has been provided to enable this station to be used in high noise areas. Potentiometer
R43 has been provided for volume control. To increase the volume to the speaker, rotate R43 clockwise.
To decrease the volume to the speaker, rotate R43 counterclockwise.
N OTE : This station will broadcast received audio over the external speaker or horn only when the station
is powered by 24 V, the station’s handset is on-hook or the (optional) headset is not connected. Received
audio is not broadcast over the external speaker if 24 V power is not supplied, the station’s handset is off-
hook or a headset is installed.
External Speaker Gain
The external speaker amplifier contains four user adjustable gain settings:
 0 dB
 6 dB
 12 dB
 24 dB
These settings enable the user to control the maximum gain of the speaker amplifier. The 24-dB setting
provides the maximum gain from the amplifier and the 0-dB setting enables the minimum gain.
Configuration jumpers P36 (GAIN0) and P37 (GAIN1) have been supplied to set the gain. Refer to Table
3 for the desired gain settings.
Table 3. Gain Setting
Setting
Jumper
P37
Jumper
P36
0 dB 0 0
6 dB 0 1
12 dB 1 0
24 dB 1 1
Audio Output to Remote Amps
A 600-ohm audio output driver has been provided to enable audio received by this station to be broadcast
over the speakers connected to Model DSA-101 Remote Speaker Amplifiers. This enables additional
areas close to this station to receive audio sent to this station.
N OTE : This station will broadcast received audio to the remote amplifiers only when the station is
powered by 24 V, the handset is on-hook or the headset is not connected. Received audio is not broadcast
to the remote amplifiers when 24 V power is not supplied, the station’s handset is off-hook or the optional
headset is installed.
Audio Output Level
The nominal level on this output is set to 0.775 Vrms. To increase the audio output level, rotate R47
(Audio Line Level) clockwise. To decrease the audio output level, rotate R47 counterclockwise.