Garmin GTX 330 Installation Manual

Also see for GTX 330: Pilot's guide addendum Manual Pilot's guide addendum Pilot's guide Pilot's guide addendum

Garmin GTX 330 Installation Manual Manual pdf 29 page image

GTX 330 Installation Manual Page 4-5190-00207-02 Rev E4.4.3 Altimeter Interconnect, Dual GTX 330 InstallationRefer to Figure C-2 for dual GTX 330 gray code altimeter interconnections. A dual GTX 330 installation canaccept either parallel wire gray code altimeter input or RS-232 serial data input as shown in Figure 4-2. Iftransponder number 2 is a Garmin GTX 327, connect the RS-232 output from the altitude encoder to J3271 pin 19(refer to GTX 327 Transponder Installation Manual, P/N 190-00187-02).Figure 4-2. Dual GTX 330, Single Encoder, Serial Input ConnectionsFor complete dual installations containing two encoders, it is best to connect one encoder to each transponder.4.4.4 Altimeter Selection PriorityThe installer must be aware of the GTX 330 priority for selecting encoded altimeter interconnections. TheGTX 330 searches in this sequence for altitude, and stops when it finds a valid pressure altitude input.Only approved devices may provide altitude to the GTX 330 in accordance with 14 CFR Part 91.217. In addition,all altitude reporting devices installed in the aircraft must meet certification requirements of 14 CFR Part 91.413.The installer must select an altitude reporting device that is a certified altitude source for the particular aircraft.Altitude reporting equipment order of precedence:1) ARINC 429 Air Data Computer (label 203, if configured W/ALT)2) ARINC 429 EFIS (label 203, if configured W/ALT)3) RS-232 Fuel/Air Data Computer (if configured W/ALT.)4) Parallel wire Gray Code input5) Shadin Altitude Serializer/Encoder6) Icarus Altitude Serializer/EncoderRefer to section 5.2.8 and 5.2.9 for the altitude data reporting configuration.