“ACTIVE” LEDs: indicate the associated portable is “ON” and an RF signal is being
received. These LEDs illuminate whether or not the channel has been enabled with the
associated “ENABLE” switch. This allows monitoring the status of a portable without
injecting noisy audio into the system.
The “LOC/MON SEL” switch, when “in,” activates the local headset mic and allows the
headset to be used as a local operating position. When “out,” the headset mic is disabled and
the earpiece is connected to the MON SEL switch. This switch allows monitoring of the
entire system (“ALL”), each individual portable separately (“R-1” through “R-6”), the wired
intercom only (“I/C”), or the link only (“LINK”). The “LOC/MON SEL” switch is provided
primarily for system troubleshooting, which may be done with the system “up” and
operating, without unnecessary disruption of communications. The receivers may be
monitored whether or not they are enabled with the associated ENABLE switch.
Rear Panel Description
“TX/RX ANT”: BNC connectors for transmitter and receiver antennas
Power Connections/Fuses: International power receptacle; 115/230 V
ac
input; terminal strip;
+11 to +20 V
dc
input (reverse-polarity protected); fuses, 1 A (dc), 1/2 A (115 V
ac
), or 1/4 A
(230 V
ac
)
“INTERCOM” Connectors: One male 3-pin XLR; one female 3-pin XLR
“CH SEL” Switch: Slide switch; selects wired-intercom channel (for wired intercom
systems that have two channels such as RTS)
“TRANSMIT” Switch: Three-position slide switch; disables transmitter in center position;
continuous transmit in “ON” position (when master station is powered); transmit when any
receiver active in “PTT” position
“LINK” Connectors: Male/female 3-pin XLR for link interconnect
Link On/Off: Enables/disables link input/output
The intercom interface is programmed by means of DIP switches inside the master station.
Unless otherwise requested, systems are shipped programmed for Clear-Com compatibility
(standard Clear-Com, not the “TW” configuration). See Table 1 (next page) for instruction
for conversion to Clear-Com “TW” or RTS compatibility.
Many different types of intercom systems can be supported, including four-wire 600-ohm-
line types, all types of “carbon mic” systems, Telex Audiocom, David Clark, telephone sets
(replaces modular handset), etc. Vega has on file programming data for some types of less
common intercom systems. If Table 1 does not include information for your intercom,
consult the Vega factory for further information.
The link circuits may be used for connecting to a second master station or to other audio
equipment (e.g., console inputs and outputs, external amplified mics, monitor
speaker/amplifiers, off-air monitor receivers, etc.). The interface is at a nominal 0 dBm
line level; however, the input gain is internally adjustable over a 20 dB range.
Wireless Intercom System
5
