Mutual Suppression Pulses; Interface Summary - Garmin GTX330 Installation Manual

1.5

Mutual Suppression Pulses

Other equipment on board the aircraft may transmit in the same frequency band as the transponder,
such as DME or another transponder. Mutual suppression is a synchronous pulse that is sent to the
other equipment to suppress transmission of a competing transmitter for the duration of the pulse train
transmission. The transponder transmission may be suppressed by an external source and other
equipment on board may be suppressed by the transponder. This feature is designed to limit mutual
interference.
1.6

Interface Summary

The GTX 330 provides the following interface connections via the rear connector:
•
Ten (10) encoding altimeter inputs.
•
External IDENT input.
•
External STBY input (useful for dual transponder installations).
•
External suppression pulse input.
•
Switched power output of up to 1.5 amps (for digital altitude encoder power).
•
Aircraft dimming bus input voltage.
•
Aircraft master switch turn-on option.
•
Serial altitude or GPS groundspeed input.
•
Serial altitude input. (Reduces wire count vs. parallel wire gray code altimeter interface.)
•
Software update input.
•
Supports Comm-A and Comm-B protocol.
•
Temperature, Altitude Hold and Density Altitude.
•
Digitally recorded voice and discrete warning annunciator activated by Altitude Hold when
limits are exceeded.
•
Diversity: GTX 330 is available with or without the diversity feature.
GTX 330/GTX 330D Installation Manual
190-00207-02
Page 1-3
Revision R