TY91/TY92 VHF Radio Installation Manual 24 November 2014
00839-00 Issue AF
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38 Trig Avionics Limited
installation, is accessed on a sub menu by holding down the MEM button for at
least 3 seconds whilst in configuration mode:
Microphone gain adjustment
In a dual TC90 control setup most of the configuration items are shared and
automatically updated between the TC90 controllers. The Display Brightness
and Frequency Step Size configuration are independently set in the local TC90
controller.
6.2.1 Intercom Volume
This setting controls the volume of the intercom.
6.2.2 Intercom Squelch
The intercom includes a voice activated squelch control to limit the
background noise heard over the intercom. Increasing the squelch level
requires a louder microphone input to gate the intercom.
6.2.3 Auxiliary Input Volume
The auxiliary input is a low-fidelity monophonic input intended for nav radio
ident inputs and simple annunciators. This setting controls the relative volume
of the auxiliary audio input.
6.2.4 Auxiliary Input Muting
This allows the auxiliary input to be muted when the radio is receiving or
transmitting speech. Turn this feature ON if the auxiliary input is being used
for non-essential services, like an MP3 player. Turn this feature OFF if the
auxiliary input is being used for essential services like annunciators or traffic
alerts.
6.2.5 Sidetone Volume
The audio sidetone is the transmitted audio signal; this setting controls the level
of the sidetone in the headphones.
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