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Configuring local speaker mute
PAGASYS GEN II (P-SYS-G)
Federal Signal www.fedsig.com
16.0 Configuring local speaker mute
16.1 Configuring local speaker mute to avoid feedback
When making a live page from the local microphone in a zone, feedback can be
prevented by muting the local speaker. The following procedure shows how to mute
a speaker using the Relay Output Module. As an example, we assume that Amplifier
Chassis 1 is already terminated to the 8-pin connector on the amplifier audio distribution
card in slot 1 on the audio (left) panel assembly in the MDF area, and the relay output
module, P-SPDT-G, is already installed on the rear MDF I/O panel, on the right side.
To mute a speaker using the Relay Output Module:
1. On amplified audio distribution card 1, terminate wires to the primary amp a
(F+) and forward- (F-) spring terminal block.
Figure 72 Target amplified audio distribution card
2. Terminate the other end of the wire on the relay output board, F+ to TB1 pin 3
(1 COM) and F- to TB1 pin 6 (2 COM).
3. Connect the speakers to be muted to pin 1 (F+ to 1 NC) and pin 4 (F- to 2 NC). This
will allow the speakers to operate normally until the relay output board is changed to
normally open.
Figure 73 Target amplified relay output board
