TX56/56A and TX57/57A Installation Manual
5 April 2022
01776-00-01
Issue AD
______________________
Page 36
Trig Avionics
5.6.9
Music Audio Input
This is a stereo input which is routed to the both headphone outputs and should
be used for connecting an MP3 player or similar device. The music input
volume is adjustable and the music mute options can be configured within the
setup menu to allow the radio reception or transmission audio to take priority.
5.6.10
Microphone Input
Microphone connections should be made using shielded twisted pair cables.
The two microphone inputs are identical, and have a nominal sensitivity of
1Vrms to 5Vrms into a 600 ohm load. A 12V DC bias voltage is supplied by
the radio to the microphone inputs to support a preamplifier in the microphone.
The microphone gains can be adjusted within the setup menu.
5.6.11
RS232 Input/Output
The RS232 input allows certain third-party multi-function displays to preload
the standby and active frequencies and to monitor the Nav/Com status. The
radio understands the Apollo SL30 protocol ($PMRRC and $PMRRV) and the
Garmin GNC protocol ($PGRMC and $PGRMV), both of which are based on
NMEA at a speed of 9600 bps.
5.6.12
Remote Flip-flop
This input is used to allow remote activation of the frequency change, and is
typically used in a helicopter. The input is active low, and will be asserted
when the voltage to ground is pulled below approximately 4 volts.
5.6.13
Nav Audio Output
This output is used to drive a conventional 600 ohm audio panel input. The
pilot can switch between voice and ident modes which switches in an ident
filter that passes only the 1020 Hz Morse identifier.
5.6.14
Nav Right/Left Output
The Course Deviation Indicator (CDI) Right/Left needle output can drive up to
5 indicators, each with 1 kohm nominal impedance. Full scale deflection is
Содержание TX56
Страница 2: ...This page intentionally left blank ...