Garmin GTX 327, Руководство по установке

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Page 4-4 GTX 327 Installation Manual
Revision K 190-00187-02
4.2.2 Altimeter Interconnect, Dual GTX 327 Installation
Refer to Figure 4-2 and Figure C-3, sheets 1 and 2 for Dual GTX 327 altimeter interconnections. A dual
GTX 327 installation can accept either parallel wire gray code altimeter input or RS-232 serial data input
as shown.
Figure 4-2. Dual GTX 327, Single Encoder, Serial Input Connections
For a complete dual installation containing two encoders, it is best to connect one encoder to each
transponder.
4.2.3 Altimeter Selection Priority
The installer must be aware of the GTX 327 priority for selecting encoded altimeter interconnections.
The GTX 327 searches in this sequence for altitude, and stops when it finds a valid pressure altitude
input.
Altitude reporting equipment order of precedence:
1) RS-232 data from GNS 480 (CNX80)
2) RS-232 Fuel/Air Data Computer (if configured W/ALT.)
3) Parallel wire Gray Code input
4) Shadin Altitude Serializer/Encoder
5) Icarus Altitude Serializer/Encoder
Only approved devices may provide altitude to the GTX 327 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.
For additional information, refer to GNS 480 (CNX80) Installation Manual 560-0982-01 for the altitude
data reporting configuration when connecting a GTX 327 to a GNS 480 (CNX80).