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3.1.5
Baro Altitude (ARINC 429) Input
Baro Altitude will be input to the TAS Processor via the Baro Altitude ARINC
429 low speed input bus. This bus may also be used as an ARINC 419 low
speed input bus. The ARINC 706 Air Data Computer will interface to the TAS
Processor using the ARINC 429 input ports and the ARINC 575 Air Data Com-
puter will interface to the TAS Processor using the ARINC 419 input ports.
3.1.6
Advisory Inhibit Input
The Advisory Inhibit into the TAS Processor will cause annunciations to be
inhibited when higher priority events occur (i.e., wind-shear alerts, terrain alert
warnings.)
The TAS Computer Unit will inhibit certain functions which would tend to
distract the pilot when faced with a potentially hazardous condition such as
windshear or terrain alerts. These conditions are presumed to have a more
immediate possibility and higher probability of harm than the threat of a col-
lision. Thus, TAS functions such as aural announcements and aural alerts
are to be inhibited by placing the TAS Computer Unit in a mode which
would preclude its issuing the unwanted information.
If the Advisory Inhibit has been activated, no new voice or annunciator outputs
can be activated by the TAS computer unit during the deferment period. If
already activated, these outputs will be discontinued within 250 milliseconds. If
an advisory condition is present when the deferment is removed, it will be
annunciated.
ADVISORY INHIBIT = GROUND
NORMAL ADVISORY/ALERT = OPEN
J10-22 ADV_INHIBIT*
3.1.7
TAS Valid Output
This output is provided as a primary indicator of valid system operation. This
output is driven to the valid state during normal operation. The TAS Valid dis-
crete will go invalid during power up self tests and operator commanded self
tests.
VALID = GROUND ( < 10 ohms to ground)
INVALID = OPEN
J10-25 TAS_VALID*
Rev 0, October/2000
NOTE
10609I00.ZIPCDL
KMH 880/KTA 870
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