User's Manual

TY91/TY92 VHF Radio Installation Manual 11 April 2012
00839-00 Issue AA
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8 Trig Avionics Limited
Remote On/Off
The on-off switching is on the controller, and switches this
input.
Microphone inputs
There are two microphone inputs, suitable for
conventional aircraft microphones.
Push-to-talk inputs
There are two push to talk inputs corresponding to the two
microphones.
Headphone output
A headphone output suitable for conventional aircraft
headsets with impedance in the region of 150 ohms.
Speaker output
A speaker output suitable for a cabin speaker with
impedance of 4 ohms or greater.
Intercom keyswitch
An optional input to allow the intercom to be switch
controlled.
Auxilliary audio
input
A single connection to allow audio annunciators or ident
tones to be routed to the headphones and speaker.
2.2.2 TC90 Controller Unit
The TC90 controller has a single 15 way D-type connector. It provides the
following services:
Power Input
The controller receives power from the VHF radio.
Front Panel Datalink
A two wire data link is used to connect the
TY91/TY92 and the controller.
Remote On/Off
The on-off switching is on the controller, and controls
this output.
External switch
inputs
Optional keyswitch inputs to enable remote transfer
and frequency stepping
Serial input
Optional input to allow preloading of frequencies,
generally from a GPS.