For Your Safe Flight Page 57
Navigation GPS Data Formats
GPS radios communicate with other equipment in various formats to
suite intended usage. You will need to determine what GPS mode is best
suited for your installation and set up both your GPS and EDM for
compatibility.
For incoming GPS data, the EDM automatically configures itself for
one of three industry standard data formats, hence there is no EDM
selection necessary for the EDM to receive the incoming data. The table
below is for reference only:
Data OUT OF GPS → INTO EDM
Format Baud rate Description
NMEA-183
(Marine Nav
Data Format)
4,800 This is the format for most handheld GPS receivers.
Loran must have sentences RMA & RMB. GPS must
have sentences RMB & RMC.
Aviation Data
Format
9,600 “Output sentence type 1” Required sentences are: A, B,
C, D, E, I and L first character identifier byte. Sentence
terminator may be either <CR><LF> or <CR> alone.
Northstar
binary
1,200 M1 setup select “NO EXTENDED”, “NAV ONLY”
Note: If you connect a handheld, set its to output ‘NMEA-183’.
The EDM sends formatted data to the GPS relating to fuel flow. This
format must be selected in Pilot Program Mode to match what the GPS
expects to receive. The table below depicts the available EDM choices:
GPS-C Fuel Flow Format for GPS Bi-directional Comm
Data OUT OF EDM → INTO GPS
GPS-C Description
0 No fuel data output
1 Garmin (Shadin Miniflow format)
2 Allied Signal (format B) “To waypoint only”
3 Arnav/EI Signal Format
4 Allied Signal (format C) *
5 (Not used)
6 Garmin 430/530 GNX-80/GX-60 “To waypoint only”
7 Garmin 430/530 GNX-80/GX-60 “To Destination only”
8 Allied Signal (format B) “To Destination only”
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