26 Operation
Transmit and Receive Antennas
The TNC transmit jack and receiver jack are both labeled on the
rear of the unit. The base station comes with two (2)
1/2-wave antennas. Always match the color dot on the rear
panel of the base station with the colored band on the antenna.
2-Wire Intercom Ports
The base station has the ability to interface with two (2)
2-wire external audio intercom systems. These XLR jacks are
designated intercom 1 and 2 on the rear panel.
They accept Telex, RTS, and Clear-Com types of intercom
systems. The pinouts of these standard types of intercom are
shown in Figure 19.
Pinouts of RTS, Telex, and Clear-Com
FIGURE 19.
Intercoms
BTR-80N Rear View
FIGURE 18.
The base station does not require wet intercom lines for
operation. Wet intercom lines are those with D.C. voltages on
them for powering 2-wire devices. The base loops through wet
intercom lines with currents up to two (2) Amps.
WARNING:
BTR-80N, TR-80N, TR-82N
Do not loop through more than two (2) Amps
of current. Damage to the base station may
result.