Setting the Gain for Radio Rebroadcast and PA
37
Installation and Maintenance Instructions
Federal Signal www.fedsig.com
Setting the Gain for Radio Rebroadcast and PA
The radio rebroadcast feature allows incoming two-way radio messages to be
amplified by the siren amplifier/relay module and rebroadcast over the siren
speakers of the SSP3000B system. The feature overrides all sirens functions.
Button 7 is programmed as the default control for radio rebroadcast.
The gain control for radio rebroadcast is a recessed potentiometer on the front of
the siren amplifier/relay module. See Figure 19 on page 38. Wiring connections
are described in “Radio Rebroadcast (Cable Assembly 17500307)” on page 31.
For public address, the Smart Siren Platinum System includes a microphone that
connects to a serial port on the back of the control head. When the operator
presses the microphone push-to-talk button and speaks into the microphone, the
operator’s voice is amplified and broadcast over the siren speakers. The primary
control for adjusting the PA gain is a recessed potentiometer on the front of the
siren amplifier/relay module. See Figure 20 on page 38. A secondary control
for the PA gain is a recessed potentiometer on the back of the control head. See
Figure 21 on page 38.
Setting the Gain for Radio Rebroadcast
To adjust the gain for radio rebroadcast:
1. Stand outside the vehicle in an enclosed area and turn on the two-way radio.
2. Adjust the volume level of the radio to its normal operating volume.
3. Press Button 7 on the control head to turn on radio rebroadcast. See Figure 18.
Figure 18 Default control head button for radio rebroadcast
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4. Stand outside of the vehicle and note the volume level of the radio rebroadcast.
If the volume is too loud or too soft, insert a small flat-head screwdriver in
the gain control port for radio rebroadcast (
RAD VOL
) on the front of the siren
amplifier/relay module. See Figure 19. Turn it counter-clockwise to increase
the volume until audio feedback (squeal) occurs or clockwise to decrease the
volume.
5. To turn off radio rebroadcast, press Button 7.
