trig TY96, Руководство по установке

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TY96/96A and TY97/97A VHF Radio Installation Manual 26 September 2018
01238-00 Issue AJ
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Page 18 Trig Avionics Limited
To use only the switch, wire the switch to the intercom key input and select the vox squelch to
the lowest setting during configuration. To use only the vox, wire the intercom key input to
ground, and configure the squelch accordingly.
5.6.8 Auxiliary Audio Input
This input is continually routed to the headphone and cabin speaker outputs. It is intended for
annunciators and identification tones.
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 12Vdc 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 GPS receivers to preload the standby and active frequencies. The radio
understands the Apollo SL40 protocol ($PMRRC) based on NMEA, at a speed of 9600 bps, and
responds to message types 1, 4, 5 and 6.
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 Power Input
The TY96 power supply can be 11-33 volts DC; no voltage adjustment is required. The TY97 requires
22-33 volts DC. In both cases use a circuit breaker with a minimum value of 5 amps.
If a circuit breaker with a higher rating is used, the wiring gauge used should be increased
appropriately.
The peak current consumption on transmit exceeds the current capability of a single pin on the
connector. Both power inputs must be wired, and at least two ground returns must be wired. Use 20
AWG wire for the power connection wires.
5.6.14 Ground Returns
There are only 3 ground pins on the 25 way connector, at pins 4, 9 and 17. Two of these ground pins
should be used for the power input leaving the other ground pin for the audio grounds. Audio grounds
should be connected together with a fly lead connected to the remaining ground pin. Refer section 5.4
for further wiring considerations.