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Figure 38-24. MFDITID ORT Abort Displays
3842
Displays BIT is initiated by depressing the h4FK
pushtile on the DD to obtain the radar modes menu,
selecting the pushtile adjacent to BIT to obtain the BIT
submenu, and then depressing the pushtile adjacent to
DISP on the BIT menu. Displays BIT is intarruptiile by
a programr estart( depressingP GM RST pushtile on the
DD), another BIT selection, or a radar mode selection.
38.5.1.3.3 Televlslon Camera Set BIT. The TCS
test verifies the status of the television camera set. The
capability of the TCS slave modes is verified, the mechanical
tracking functions (i.e., slewing and track) are
checked, and the radar-related TCS support functions
are monitored. Detected faults are displayed on the TID
at test completion.
TCS TEST is initiated by depressing the MFK
pushtile on the DD to obtain the radar modes menu,
selecting the pushtile adjacent to BIT to obtain the BIT
submenu, and then depressing the pushtile adjacent to
TCS on the BIT menu. TCS testing is interruptible by a
program restart (depressing PGM RST pushtile on the
DD), another BIT selection, or a radar mode selection.
38.5.1.3.4 Digital Display Built-h Self-Test. The
DD has a standaloneB IST capability that must be initiated
and evaluated by the RIO. It tests DD fonctions as
well as its discrete interfaces with the sensor control
unit, sensor hand control, and TID.
DD BIST is initiated by depressing the CiD TEST
pushtile on the radar control panel portion of the digital
display, When in flight, continuous depression of the
C/D TEST pushtile clears DD display and initiates
BIST. Releasec ausest he DD to revert to tactical operation.
When not airborne, the fmt depression clears the
DD display and initiates BIST; the second depression
causes DD to revert to tactical operation.
38.5.1.3.5 Special Tests BIT. Initiated SPL TEST
is designed to validate the operation of a specific radar
submode or subfunction, and is u&primarily for maintenancep
urposes.T heset estsa re initiated with selection
of the SPL TEST pushtile on the BIT menu, selection of
the NBR pushbutton on the DD keypad, entering the
appropriate test number, and then pushing the ENTER
button.
38.5.9.4 Test Target BIT. Thetesttargettimctionis
a RIO activated and evaluated end-toend test of the
radar system. It can be used to quickly verify that the
radar system is capable of detecting, processing, and
displaying reasonablys izedt argets.It is availablei n, and
I
can be used to check the operation of low, medium, or
high PRF tactical modes. Test target entry is indicated
by a TT display on the lower let? position of the TID.
NAVAIR 0%Flu-1
ToinitiatetesttargetBITJ4FKpushtileonthedigital
display is depresseds, electing the BIT menu The test
target is selected by depressing the button adjacent to
TEST TGT. To enable the location for test target injection,
the pushtile adjacent to RDM TGT or RCVR TGT
is depressed. To terminate the test target BIT, the
pushtile adjacent to the enabled target injection location
is reselected.
385.1 .J Continuous Monitoring. CM pericdically
samples mission essential radar set signals during tacticaloperation,
andinforrmrtheRIOofdetectedproblems.
CM performs passive monitoring of key radar signals,
a t a onequarter-secondr ate.T hese,signalsin clude
power faults, overtemperature indicators, BIST status
(i.e., equipment ready) signals, processor load status,
transmitterp eak power, calibration failures,a ntennah ydraulic
interlocks, and transmitter interlocks.
Radar anomalies appear on the TlD, in the lower left
quadrant,a s two charactera cronyms.A cronyms will be
displayed continuously while a failure condition exists.
If multiple failures occur, the appropriate acronyms will
be automatically updated at a 2-second rate. W’ :n
an acronym is displayed, the RIO can select the CM
maintenance display to obtain more detailed information
on the specific unit that has a maltimction or anomaly.
The RIO can also initiate BIT at any time to co&m
that hardware status is unchanged.
Aircraft system anomalies will appear on the TID, in
the lower leti quadrant directly below the radar CM
acronyms, whenever a fault is detect& Corresponding
failure acronyms will be displayed for 2 seconds.
38.5.2 Radar BIT Operation. The radarBIT function
is contained in the RDP. This specialized radar computer
provides necessary timing and control signals to
F-14D radar subsystem to conduct various tests. BIT
testingi s generallyi ndependento f RIO interaction,w ith
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F-14D 飞行手册 Flight Manual 3(78)
