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WEATHER RADAR (X-BAND)
(TYPE RDR-160)
PILOT'S OPERATING HANDBOOK
SUPPLEMENT
6
FLAMMABLE OR EXPLOSIVE MATERIALS, THE FOL-
LOWING TESTS MUST BE ACCOMPLISHED WITH THE
FUNCTION SWITCH ALWAYS IN THE "TEST" MODE OF
OPERATION.
1.
Function Switch -- STBY position and after 30 seconds select TEST
position.
2.
HOLD Selector Switch
--
DISENGAGED (scan mode).
3.
Mode Selector Control -- Wx position.
4.
BRT Control
--
ADJUST to desired brightness.
5.
Indicator Display -- CHECK TEST PATTERN with the following:
a.
Four equally spaced range marks should be visible, the word
"TEST"
and numerals
"40-10"
should appear in the alphanu-
meric area of display.
b.
No video noise distortion should appear on the display.
c.
There are two distinct brightness levels appearing on the
indicator.
d.
Starting at the lower center of the
display,
there will either be
four or five bands extending outward. The variance in the
number of bands is due to the design of the display unit which
causes the nearest light shading band (small) to appear on
units with a five band display
and
not
appear on
units with a
four band
display.
The four and five band displays are
as
follows:
Nearest is light shading (appears on five band display only).
Next (or nearest) is intermediate shading (intermediate shad-
ing appears as the nearest band on four band displays).
Next is dark or contour area.
Next is intermediate
shading.
Next is light shading .
.
6.
Mode Selector Control -- WxA position and observe that the word
~
.
"TEST"
and numbers
"40-10"
appear in the alphanumeric area of
display. Ensure that the pattern center band alternates between the
darkest shade and the brightest shade at about 1 time per second.
7.
Mode Selector Control -
-
MAP (maximum gain) position and
observe that the word
"TEST" and
numbers "40-10" appear in the
alphanumeric
area display. Note that stroke line (antenna posi-
tion) moves across the indicator screen through the range marks
for the full 90 degrees without jumping.
8.
HOLD Selector Switch -- ENGAGE HOLD pushbutton and observe
that the word "HOLD" replaces TEST and flashes at the rate of once
per second in the alphanumeric area of
display.
Note that the
strobe line disappears.
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