
SYSTEM INSTALLATION MANUAL
89000016
(4)
“set trafVelVal” Command
(a)
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 must 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.
(b)
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.
(c)
The KGX attempts to validate NACv=0 velocities in accordance with 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 to
“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 must 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”. Refer to Figure 3042.
Figure 3042. (Sheet 1 of 1) “set trafVelVal” Command
(5)
“set displayout”
(a)
“trafficOnly” provides traffic information to the display (position, ground track, etc.) but no
weather or other flight information.
(b)
“fisbOnly” provides weather and flight information (NOTAMS, TFRs, ATIS, etc.) but no
traffic.
(c)
“traffic&fisb” provides traffic, weather, and flight information simultaneously.
(d)
This command allows the installer to set the type of data to be sent to the display. The
installer can configure the KGX to output traffic only, FISB only, or both. By default, the
KGX outputs the traffic and FISB data to the display. Refer to Figure 3043.
Figure 3043. (Sheet 1 of 1) “set displayout” Command
EFFECTIVITY
ALL
Page 3039
22 Dec 2016
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