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Garmin GTX-330 (SV)

Pre-Owned Mode S, IFR-certified Transponder

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Garmin - Servicable - 010-00230-01/U

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A panel-mounted Mode S digital transponder series with traffic datalink capability and dedicated pushbutton keys for squawk code selection, the GTX 330 family brings ATC aircraft surveillance to new levels of precision, reliability and performance.

Leading the way with ADS-B

With IFR-certified ES, or Extended Squitter, versions of the GTX 330, Garmin has taken the lead in providing an affordable pathway to ADS-B compliance for the FAA’s proposed Next Generation airspace system. Using precise GPS-referenced positioning information, the extended squitter technology enables transponders to automatically transmit more accurate, and more useful, traffic surveillance data – including aircraft flight ID, position, altitude, velocity, climb/descent, and heading information. (Compared to traditional Mode S and Mode C transponders, which can only broadcast altitude, and thus require ground-based radar to correlate and identify the aircraft’s position.)

Traffic in simulcast

As the first general aviation transponder to receive TSO-C166a authorization for 1090 MHz extended squitter transmission, Garmin’s GTX 330 ES improves upon the existing transponder query system – while working seamlessly with existing ATC protocols. The ADS-B reports provide ground controllers with considerably faster updates than traditional radar. And by simultaneously broadcasting this information to TAS or TCAS equipped pilots, it enables them to essentially see the same traffic picture for their location that ATC is watching on the ground. Thus, with everyone in the ADS-B loop watching and reacting to the same flight trajectories, safe separation is far easier to maintain.

The quality shows

All the features of Garmin’s standard GTX 330 transponder are retained in the ES version: Solid-state design, 250-watt transmitter, remote ident and auto standby, altitude monitor with voice alerts, TIS traffic interface, and an easy-to-read LCD display that reverses its numbers out of black for optimal viewing in all lighting conditions. A dedicated VFR squawk code button makes entering the numbers quick and easy. And a variety of useful timing and display functions include flight time, count-up and count-down timers, plus current pressure altitude. The GTX 330 can also be used to satisfy the European mandate for Mode S level 2 surveillance. And an antenna diversity option is added with the GTX 330D – for improved air-to-air surveillance of TCAS-equipped aircraft flying above you.

GTX 330: Better surveillance for busier airspace.

  • Panel mounted, 4096 codes
  • Altitude reporting capability
  • Push button code entry
  • Dedicated programmable VFR button
  • Flight time
  • Count up or down timers
  • Pressure altitude display
  • Level 2 Mode S transponder
  • Traffic Information Services (TIS) capability
  • TSO C112 Class 2A1, certified to 55,000 feet

Physical & Performance:

Unit dimensions, WxHxD: 6.25"W x 1.65"H x 11.25"D (15.9 x 4.2 x 28.6 cm)
Weight: 4.2 lb (1.9 kg)
Display type: digital
Voltage range: 11-33
Transmit power: 250 watts nominal
Transponder type: mode A/C and S
Squawk code selection: push-button

Features & Benefits:

Solid state transmitter (more efficient, longer life): yes
Verbal alerts: yes
Traffic Information Services (TIS) alerts compatible: yes
Outside air temperature display: yes
Pressure altitude readout: yes
Altitude monitor function: yes
Density altitude readout: yes
Built-in timers: yes
Automatic ALT/GND mode: yes
Diversity (supports top and bottom mounted antennae to enhance visibility to TCAS-equipped aircraft flying above you): no
Panel-mounted: yes

  • GTX 330 transponder
  • Installation kit

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GTX-330 (SV) Product Commentary

Sarasota Avionics The GTX330 is a mode A/C/S digital display transponder. The GTX330 shares the same solid state design and push-button squawk code selection of the GTX327, but the GTX330 is a Mode S transponder with the ability send TIS traffic information to a compatible Garmin display, giving customers another set of eyes to look for other aircraft nearby. The GTX330 is also available in the “ES” version, which stands for extended squitter. When ADSB out is required for operation about 18,000ft, pilots with the GTX330/ES will meet ADSB “out” requirements and can fly in Class A airspace.

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