Garmin GDL 88 Installation Manual

Garmin GDL 88 Installation Manual Manual pdf 38 page image

Page B-2 GDL 88 TSO Installation ManualRev. A 190-01122-00Appendix B GDL 88 DATA FORMATB.1 GDL 88 RS-232 Fuel/Air Data Input FormatB.1.1 Electrical InterfaceThe input signals are compatible with RS-232C. Data input at 9600 baud (1200 baud for Apollo AltitudeEncoder) with a word length of 8 bits, one stop bit, and no parity. One message is received per second.B.1.2 Icarus Altitude SentenceThe GDL 88 is capable of receiving the following 10-byte message from the Icarus Altitude Serializer:ALT 12345Where:ALT ASCII characters space (0x20)12345 altitude in feet carriage return (0x0d)B.1.3 Apollo Altitude SentenceThe GDL 88 is capable of receiving the following 17-byte message from an Apollo Altitude Encoder:#AL<+/->ddulWhere:#AL ASCII characters space (0x20)<+/-> sign indicator (0x2B[“+”] or 0x2D[“-“])ddddd altitude in feet (-1000 feet to 35,000 feet)T ASCII characters<+/-> sign indicatordd sensor temperatureul checksum of bytes 1 through 14 in hex ASCII (i.e. “FA”) carriage return (0x0D)