Garmin GTX 330 Support Question

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Question posted by swanlake41976 on May 14th, 2014

Altitude Reporting

I have a GTX330 and I intermittently have problems with the altitude reporting to ATC incorrectly or not at all. It will randomly report several hundred feet off altitude and then indicate a descent when really climbing?

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Related Garmin GTX 330 Manual Pages

Pilot's Guide - Page 2

... software embedded in the normal operation of Garmin and is strictly prohibited. CAUTION: The GTX 330 should be viewed and to print one copy of this device (the "Software") in... agree not to decompile, disassemble, modify, reverse assemble, reverse engineer or reduce to the GTX 330 Transponder throughout this copyright notice and provided further that the Software in any storage medium, for...

Pilot's Guide - Page 3

.../0870.8501251 NOTE: It is limited to line of purchase. Low altitude or aircraft antenna shielding by climbing to a higher altitude. Limited Warranty This Garmin product is warranted to be free from defects in materials or workmanship for two years from the GTX 330 is the responsibility of incidental or consequential damages, so the above...

Pilot's Guide - Page 4

... TCAS equipped aircraft. Mode Selection Keys OFF  Powers off the GTX 330. Replies to interrogations from an external altitude source, which is not adjusted for adjusting contrast and display brightness. however, the reply signal will not reply to identification and altitude interrogations as indicated by the Reply Symbol ( ). You may be selected in standby...

Pilot's Guide - Page 5

... fields are displayed (dependent upon installation configuration). Display data includes Pressure Altitude, Flight Time, Altitude Monitor, Count Up, and Count Down timers. Cancels the previous keypress... configuration) a VFR Key Disabled message appears to ATC by the GTX 330. This ensures the notification is sent to indicate that no operation took place. FUNC Changes...

Pilot's Guide - Page 6

...by the 8 and 9 keys. Activates a voice alarm and warning annunciator when altitude limit is selected during installation configuration. OAT/DALT: Displayed when the GTX 330 is configured with the 0 - 9 keys. Backlighting is controlled by the ... transmit the position of ATC. Turn ADS-B OFF only at the request of the aircraft. NO ADSB: Will appear in feet, hundreds of installation.

Pilot's Guide - Page 7

... installation. When the aircraft is annunciated. Altitude Trend Indicator When the PRESSURE ALT page is displayed, an arrow may be displayed depending on the vertical speed rate. The sensitivity of these arrows is initially set (dependent upon installation configuration), the GTX 330 waits a specified length of the altitude, indicating that the altitude is increasing or decreasing.

Pilot's Guide - Page 8

... on ATC radar with a flashing alert when the altitude excursion exceeds the configured deviation value. When FAIL is annunciated no flight plan is automatically displayed with the correct voice call sign for the aircraft. The GTX 330 may be permitted by the flight crew is not required, the installer configures the system to report the...

Pilot's Guide - Page 9

...GTX 330 automatically removes the spaces upon completion of the change . When no number (as shown) or with the last FLT ID entered. If an error is entered, press the CRSR key to move the cursor to the OK? If an incorrect...-enter the correct FLT ID. If the FLT ID PWR-UP ENTRY is sent to ATC by the GTX 330. At system power-up the FLT ID may be activated immediately following a FLT ID ...

Pilot's Guide - Page 10

... Information Service The GTX 330 Mode S transponder provides a data link for pertinent aircraft information and does not include 3D position. ATC radar sends a traffic picture within range of your installation and whether it is ADS-B version 2 compliant. Audio Alerts (Setting options; male/female voice or tone, and volume level.) • "Leaving Altitude" - Refer to...