GAI-Tronics ITA2000A ITA2000A Series Tone Remote Adapter with Scanning User and Installation Manual - Manual (Page 12)

Operation ITA2000A Series Tone Remote Adapter
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Supervisor Button
The
SUPERVISOR
button with the associated LED indicator provide full dispatcher control of the radio
system. This button is used to enter the supervisor mode or the test mode. Refer to the Operation section
for more information.
Desk Microphone Port
The front panel desk microphone port (
MIC
), is an 8-pin modular connector that supports an external
connection for local dispatch control. (Possible accessories include desk, gooseneck, or boom
microphones, or a headset or footswitch via the GAI-Tronics XAAB002A Audio Accessory Box).
Audio from this microphone is routed to the station transmit and receive audio and the telephone line
while push-to-talk is applied from the external microphone. The front-panel mic audio does not have a
guard tone notch applied. Station receive audio is also provided at the
MIC
connector. This feature
allows a handset or similar device to be used in place of a desk microphone.
An external microphone monitor function places the ITA2000A in the monitor mode while asserting
PL/DPL disable at the radio connector. The microphone input type is passive, with an input impedance
of less than 2 k
 and a nominal input level of −20 dBm. The GAI-Tronics XDM004A Desk Microphone
is an acceptable example.
Desk Microphone Port Pinout
Pin No. Function
1 B+ OUT (through 10 ohms)
2 N/C
3 Monitor IN (closure to ground)
4 AGND
5 Mic IN (with bias voltage)
6 PTT IN (closure to ground)
7 N/C Desk Mic Port Pinout
8 RX audio OUT (handset audio)