Radio Installation 27
Microphone
Clip (TM8115
Radios Only)
Install the microphone clip in the most convenient loca-
tion for the radio user. It must be within easy reach of
the user, but in such a position that the microphone PTT
key cannot be inadvertently activated or jammed on.
TM8105
Remote
Connector
The TM8105 has a 9-way D-range socket on the control
head, for remote connection. The pin allocations of the
remote connector are shown in the following diagram
and table.
remote
connector
Pin Signal Description
1
RX_AUD
receive audio output (after volume
control)
2
TXD
asynchronous serial port: transmit data
3
MIC_AUD
microphone audio input
4
RXD
asynchronous serial port: receive data
5
ON_OFF
hardware power on/software power off
6
+13V8_BATT
unswitched 13.8V power supply
7
PTT
PTT input from microphone, with
hookswitch signal
8
AGND
analogue ground
9
DGND
digital ground
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