Garmin GTX328 Mode S Transponder

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With the introduction of the Garmin GTX 328 solid-state Mode S digital transponder, GARMIN enables VFR/Class 2 aircraft to meet the reduced certification requirements for the VFR Mode S mandate.

The GTX 328 is also IFR certified for aircraft operating under 15,000 feet and with a true airspeed of under 175 knots.

The GTX328 has many of the features of the GTX330 Mode S transponder, including outside air temperature, count up/down timers, altitude monitoring, density altitude functions, flight ID input and has a digitised voice output for pilot warning of altitude limits or timer expiration.

Some of the GTX 328's biggest features are the easiest to see. Among them, the easy-reading DSTN Liquid Crystal Display which reverses the numbers out of black for optimal viewing. The numeric keypad makes entering a squawk code a snap, and a dedicated VFR button allows for quick-and-easy VFR squawking.


General specifications
TSO Compliance	C112
Power requirements	Supply voltage: 11-33 Vdc Operating current: 27 Watts
Temperature range	-20C to +55C (normal operation)
Altitude	55,000 feet
Transmitter frequency	1090 MHz
Transmitter power	250 watts nominal at unit
Receiver frequency	1030 MHz
Receiver sensitivity	-74 dBm nominal for 90% replies
Mode A capability	4096 ident codes
Mode S capability	25 foot resolution with suitable serial data from -1000 to 62,700 feet
External
Suppression input	Lo ‹ 0.5V; High › 8V
Display	DSTN LCD Display
Weight	4.2 lbs. (1.9 kg) installed with rack and connectors
Physical dimensions	Depth 11.25in , Width: 6.25in , Height: 1.65in