GAI-Tronics XAAB002A Audio Accessory Box User Manual
Page 11
Model XAAB002A Audio Accessory Box
Operation
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J3, Desk Microphone, 8-pin Modular, Motorola Standard
J3 is the connector for the desktop microphone, Model XDM002A. The pin-out matches the Motorola
standard 8-pin modular desk mic.
Table 3. J3 Desk Mic Connector Pin-out
Pin No. Function
1 Not
connected
2 Not
connected
3
Monitor logic input from desk mic
4 Audio
ground
5
TX audio towards radio. Nominal level = 80 mV ac
6
PTT logic low output towards radio
7 Not
connected
8
RX audio from radio. Nominal level = 100 mV ac
J4, GAI-Tronics Handset, 4-pin Modular Connector
J4 is the connector for the GAI-Tronics handset.
Table 4. J4 GAI-Tronics Handset Connector Pin-out
Pin No.
Function
1
TX audio towards radio. Nominal level = 25 mV ac
2
RX audio from radio. Nominal level = 100 mV ac
3
Handset analog logic functions
4 Audio
ground
J5, Boom Microphone Audio, RCA-type, Phono-Jack Connector
J5 is an RCA-type audio jack that is used as the connector for a boom, a Model XGM002A Gooseneck
Microphone, or a Model XDM003A Desktop Mic.
Table 5. J5 Boom Microphone Audio, Phono-Jack Connector Pin Function Descriptions
Pin Description Function
Center pin
TX audio input
Outer shield
Audio ground