Garmin Apollo CNX80 Installation Manaul - page 139
Other manuals for Apollo CNX80:
Pilot's Manual, Data List, Quick Reference Manual, Supplemental Flight Manual, Supplemental Flight Manual, Installation Manual, Installation Manual, Pilot's Manual
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Appendix B - Serial Interface Specifications
GNS 480 (CNX80) Installation Manual
560-0982-01 Rev L
Figure B-1. Altitude Data Input
B.1.1.2
Shadin Altitude Format
The Shadin altitude format is 9600 baud with a message length of 17 characters, as defined below:
RMS
where:
RMS ASCII
characters
(0x20)
<+/-> sign indicator (0x2b["+"] or 0x2d["-"])
12345 altitude in feet
T ASCII
character
<+/-> sign
indicator
12 sensor
temperature
ul
checksum of bytes 1 through 14 in hex ASCII (e.g., "FA")
Note: Checksum is calculated by adding each byte in the message (1 through 14).