ADS-B FDL-978 Series and
Lite Series Installation Manual
Document No. 87343 Rev G
6-2
FFS Copyright © 2016 All rights reserved.
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
Contents
Description
ZBddd
True Air Speed
ddd = knots (40 to 600)
ZDsdddd
Pressure Altitude
s = sign, dddd = tens of feet
(-100 to +5999)
ZKsddd
Vertical Speed
s = sign, ddd = tens of feet/minute (-600
to +600)
ZRddd
Packet Checksum
ddd = number (0 to 255)