14
4-wire Auxiliary (balanced)
4-wire Auxiliary (balanced) intercoms use an individual 5-pin XLR on each of the
two channels in each module. Refer to Figure 8. XLR pin functions are given in
Table 3. Intercom Module Gain is 0 dB.
NOTE:
50 dB of gain may be added to 4-wire module inputs for MIC level
applications via a switch on the intercom Aux-piggyback board. See Audio Setup
on page 4.
PIN #
FUNCTION
Impedance
Signals
1
Ground
2
Input (+)
3
Input (-)
600 Ohm Input
MIC: +8 dBm
LINE: -32 dBm
4
Output (+)
5
Output (-)
>=600 Ohm Load
+8 dBm
Table 3: 4-Wire Intercom Connections
Figure 8: 4-Wire (Balanced) intercom Module
Clear-Com
Clear-Com intercom modules have a 3-pin XLR connector for each of the A and
B channels. This Telecast module fully supports the Clear-Com signaling
protocol and signal levels. The Clear-Com Intercom Connections are listed in
Table 4.
Pin #
Function
1
Ground
2
+ VDC Power
3
Audio
Table 4: Clear-Com Intercom Pin-out
