FreeFlight ADS-B FDL-978 Series Installation Manual page 126

ADS-B FDL-978 Series and
Lite Series Installation Manual
Document No. 87343 Rev G
supply data in a particular field, the field is filled with dashes ("-" = 2DH). The table below lists
the message items used by the FDL-978-XVR. Additional items may be in the message, but
they are not used by the units.
Item Format
ZBddd
ZDsdddd
ZKsddd
ZRddd
6-2
Contents
True Air Speed
Pressure Altitude
Vertical Speed
Packet Checksum
Description
ddd = knots (40 to 600)
s = sign, dddd = tens of feet
(-100 to +5999)
s = sign, ddd = tens of feet/minute (-600
to +600)
ddd = number (0 to 255)
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