Installation Manual
Page 49
...) in the aircraft, the GNS 480 (CNX80) must be turned off during GTX 330 software upload, due to loading of an optional software upgrade connector is installed in a system other than a Garmin Integrated Flight Deck an optional RS-232 serial data connector should be installed in ...connect J3302, (and J3303 for access, such as in the aircraft, transponder removal and reinstallation for software upgrade is removed from the aircraft. If the connector is wired in Test mode. The GTX 33 transmits Mode S acquisition squitter replies about once per second whether interrogations are received or...
...) in the aircraft, the GNS 480 (CNX80) must be turned off during GTX 330 software upload, due to loading of an optional software upgrade connector is installed in a system other than a Garmin Integrated Flight Deck an optional RS-232 serial data connector should be installed in ...connect J3302, (and J3303 for access, such as in the aircraft, transponder removal and reinstallation for software upgrade is removed from the aircraft. If the connector is wired in Test mode. The GTX 33 transmits Mode S acquisition squitter replies about once per second whether interrogations are received or...