1-23 TM106601_(7/01)
USE OR DISCLOSURE OF DATA CONTAINED ON THIS PAGE IS SUBJECT TO THE
RESTRICTION ON THE TITLE PAGE OF THIS DOCUMENT.
OMMAND
YSTEMS
IVISION
Operating the TILT control is covered in pilot’s manuals for radar systems. This control is important.
Improper use can allow a potentially dangerous storm to remain undetected. For additional
information, refer to Bendix publication ACS-927, Airborne Weather Radar Antenna Stabilization
Criteria.
The Control Panel pushbuttons are of the push-on/push-off type. The first time the button is pressed
and released, it turns on a function. The next time the button is pressed, it turns off the function. The
mode select buttons are all push-on/push-off type.
The four primary mode buttons on the Control Panel (WX, WXA, SRCH, BCN) are all electrically
interlocked by internal circuitry. If one of the buttons has been pressed to select a mode, pressing one
of the other four mode buttons will override the previous selection. Only one of the four mode
buttons can operate at a time.
If the WX mode is selected, and then (say) the SRCH mode is pressed, the display will go to SR1
mode. However, if the SRCH button is pressed again the display will go to SR2 mode. If the WX
button is pressed again, the mode will change to the WX mode.
The currently selected mode (or modes) shall always be displayed. Refer to the MFDs Pilot’s Guide
for the location of the mode on the display.
1.6.4.2 Turn On Procedure
(a) Turn the Function Select Switch from the OFF to the STBY position.
(b) Wait about 100 seconds for the equipment to warm up and then move the Function Select
Switch to the TEST position.
(c) Check the display. The test pattern should appear approximately l00 seconds after the Function
Select Switch is rotated from the OFF position to the TEST position. The range should be 80
miles. The test pattern will be for 120-degree scan, and will also contain the alphanumerical
information for mode, range, range marks, etc. RT FAULT should appear on the display (this is
normal operation when in the TEST mode). The word TEST should appear on the display.
(d) Adjust brightness control on the MFD for desired screen brightness.
(e) When safe conditions exist (see operating precautions in previous paragraph), place Function
Select Switch in the ON position to activate the radar system. The display will automatically
appear in the WX mode.
1.6.4.3 Primary Mode Selection Procedures (WX, WXA, SR1, SR2, SR3, BCN)
1.6.4.3.1 Weight-on-Wheels (WOW) Override
If the system has been installed to use the weight on wheels function during ground operation and taxi
situations, the transmitter will not go to the ON position but remains in the test mode displaying the
test pattern until the aircraft is airborne.
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