Dynon Avionics EFIS-D100 Installation Guide - Manual (Page 21)

Instrument Installation
EFIS-D100 Installation Guide 3-9
SERIAL ALTITUDE FORMATS
There are four formats used by serial transponders. Choose the correct format for your
transponder in the ALTENC menu, using the FRMAT button.
Format 1
Used By Dynon Encoder Serial-to-Parallel Converter, Garmin AT
(formerly UPS Aviation Technologies)
Baud rate
1200
Format #AL, space, +/-sign, five altitude bytes, T+25, checksum,
carriage return
Example message #AL +05200T+25D7[CR]
Format 2
Used By Magellan
Baud rate
1200
Format $MGL, +/- sign, five altitude digits, T+25, checksum, carriage
return
Example message $MGL+05200T+25E3[CR]
Format 3
Used By Northstar, Garmin
Baud rate
2400
Format ALT, space, five altitude bytes, carriage return
Example message ALT 05200[CR]
Format 4
Used By Garmin GTX330 (set on Icarus input), Garmin GTX327 (set
on Icarus input), Garmin GTX328, Icarus, Trimble
Baud rate
9600
Format
ALT, space, five altitude bytes, carriage return
Example message ALT 05200[CR]