ADS-B FDL-DB Dual Band Series
Installation Manual
Document No. 88552 Rev A
5-34
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ADS-B failure. The FDL-978-XVR does
not
implement a Conflict Situation Awareness (CSA)
algorithm
. For all other displays leave this parameter at the default setting of “disable.”
The FDL-978-XVR does not implement a CSA algorithm.
Figure 29: FDL-DB Series set cheltonCSA command
5.2.2.12.4.3
“set trafVelVal” Command
This command enables/disables the DO-317A/TSO-C195A Traffic Velocity
Validation\Invalidation of legacy ADS-B Transmitters that transmit NACv values of 0. This
parameter defaults to “enable” and should
ONLY
be set to “disable” when interfacing to legacy
displays that are 1)
not
TSO-C195a compliant and 2)
do not
adequately display non-directional
traffic symbols. Several non-TSO-C195a displays adequately display non-directional traffic and
do not require velocity validation/invalidation to be disabled.
The FDL-978 Series attempts to validate NACv=0 velocities per DO-317A/TSO-C195a but
some traffic states (low-speed ground) will still cause the NACv=0 track velocities to be
invalidated and sent to the display as non-directional traffic. Setting this parameter t
o “disable”
turns off all DO-317A/TSO-
C195a velocity validation/invalidation and passes the track’s velocity
data to the display as directional traffic. This parameter should
only
be set to “disable” for legacy
non-TSO-C195a displays without non-directional traffic symbols when occasional display of
non-directional traffic is deemed to be unacceptable or misleading. Otherwise leave this
parameter at the default setting of “enable.”
The legacy MX-20 Display does not support non-directional traffic symbols and instead displays
a directional traffic symbol pointing at approximately 120 degrees from North. For compatibility
with the ADS-
B system, the traffic velocity validation should be set to “enable” for this display.
Figure 30: FDL-DB Series set traffVelVal command
5.2.2.12.4.4
“set displayout”
This command allows the installer to set the type of data to be sent to the display. The installer
can configure the FDL-DB-XVR to output traffic only, FISB only, or both. By default, the FDL-
DB-XVR will output the traffic and FISB data to the display.