TX56/56A and TX57/57A Installation Manual
5 April 2022
01776-00-01
Issue AD
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Page 54
Trig Avionics
When the Com monitor is active, a
+2
icon appears next to the standby
frequency, and the radio will scan between the active and standby frequencies
listening for transmissions. The primary channel has priority – a transmission
on the primary channel will interrupt the secondary channel. As an aid to
identifying which channel is active, the RX icon will light next to the active
channel and the secondary channel will appear slightly quieter than the
primary. If your radio is wired for stereo and you are using a stereo headset,
the secondary channel will also appear to be to the right of the primary
channel.
This is useful in an aircraft with only a single radio since it allows you, for
example, to copy the ATIS whilst maintaining a listening watch on the ATC
frequency.
When the Nav mode is active, pressing the MON button activates the standby
VOR frequency and displays the radial of the standby VOR. This allows you
to find an intersection of two beacons with only a single TX56 receiver. The
primary VOR/LOC will be displayed as usual on your CDI, whilst the
secondary radial can be read on the screen.
