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Page 2-2 GTX 330 Installation Manual
Revision G 190-00207-02
2.2.3 Additional Equipment Required
• Cables - The installer will supply all system cables including circuit breakers. Cable
requirements and fabrication are detailed in Section 3 of this manual.
• Hardware - #6-32 x 100° Flat Head SS Screw [(MS24693, AN507R or other approved fastener)
(6 ea.)] and #6-32 Self-Locking Nut [MS21042 or other approved fastener (6 ea.)]. Hardware
required to mount the installation rack is not provided.
• Encoding Altitude Digitizer - Use encoding altimeter manufacturer’s instructions, install
according to FAA AC 43.13-1B and AC 43.13-2A. The Garmin GAE 43 (Garmin
P/N 013-00066-00) can provide altitude data in either serial or parallel gray code format.
2.3 Installation Considerations
The GTX 330 can interface with equipment including altimeters, Air Data Computer (ADC) and a
temperature probe. RS-232 and ARINC 429 provide a serial communication path between interfacing
equipment. Fabrication of a wiring harness is required.
Optional available discrete line interfaces are described in Section 4.5.2, Discrete Inputs, and shown in
installation diagrams provided in Appendix C.
2.4 Antenna Installation
2.4.1 Location Considerations
Antenna mounting should utilize the aircraft manufactures Type Certificated antenna location and style of
antenna. If a second (diversity) antenna is installed in the aircraft, considerations for its mounting should
be made as outlined in Figure 2-1. The antenna installation should be installed in accordance with AC
43.12-2A Chapter 3. Note that penetration of the pressure vessel on the pressurized aircraft requires
additional data not contained in this manual. (See Section 2.5)