Page 1-2 GTX 327 Installation ManualRevision K 190-00187-021.3 Mutual Suppression PulsesOther equipment on board the aircraft may transmit in the same frequency band as the transponder, suchas DME or another transponder. Mutual suppression is a synchronous pulse that is sent to the otherequipment to suppress transmission of a competing transmitter for the duration of the pulse traintransmission. The transponder transmission may be suppressed by an external source and otherequipment on board may be suppressed by the transponder. This feature is designed to limit mutualinterference.1.4 Interface SummaryThe GTX 327 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 power input (11 to 33 Volts).• Aircraft dimming bus input voltage.• Aircraft master switch turn-on option.• Serial airdata or GPS groundspeed input.• Serial altitude input. (Reduces wire count vs. parallel wire gray code altimeter interface.)• Software update input.