14
15 COMM interface
Only used for updating the radio body’s firmware at present.
16 I/Q signal output port
A 3.5mm connector (3 wires) used for IQ signal output.
17 ACC interface
See the interface details on page 10.
18 DC power interface
DC power input (PSU or battery). The round hole is the negative
connection and the square hole is the positive connection.
19 Ground terminal
Good grounding can improve the receiving and transmitting
performance of the G90/S and reduce the possibility of RF ingress.
Machine Interface – Head Unit
20 MIC (microphone) interface (located on the right-hand side)
Used to connect the included multi-function handheld microphone.
21 Headphone interface (located on the left-hand side)
This is a 3.5mm stereo connector (3 wires) used to connect earphones.
(See Page 10 for the wiring details).
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