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8.1
B.
(10) AUTO TILT - Places elevation control under auto tilt which adjusts
antenna tilt
in relation
to
altitude
and
selected
range.
Tilt
knob
can
be
used
for
fixed
offset
corrections
of
up
to t2.O
degrees.
(11) COLORCAL" -
The COLORCALW
feature
of the PRIMUS@
870 COLORADAN
more accurately displays the precipitation levels of distant
storms. With the COLORCAL'"feature, distant storms that would
normally be displayed as low intensity are shown as heavier, more
accurate intensity. The radar system cannot detect light rain
beyond a certain range.
Beyond this range there is not enough
rain to send back a detectable signal. For the radar to detect a
target at this range and beyond, the target must be at least
moderate rain. The COLORCALN feature
will
not
let
any
target
at
this
range
or
beyond
be
displayed
as a green (weak) signal. All
targets in this range will be displayed in yellow, red, or
magenta.
There is also a range where moderate rainfall cannot be detected.
At this range and beyond, only heavy and extremely heavy rain can
be detected. The COLORCALN feature will not allow green or yellow
targets at this range and will only show targets as red and
magenta.
NOTE. The boundaries at which these COLORCAL'" changes occur are
—.
affected by the REACT compensation system if it is active.
These boundaries are irregular in REACT. COLORCAL'"is
disabled when in variable GAIN.
(12) Hidden Modes
(a) Roll Offset - This is an in-flight adjustment that can be
made when stabilization errors are detected. To enter this
mode, select WX mode and VAR GAIN. Select RCT four
times
within 4 seconds. VAR and RCT will not be annunciated.
Adjust the GAIN control until the ground returns are
symmetrical. To exit roll offset mode, select RCT four times
within 4 seconds. VARwill be displayed.
(b) Stabilization Off - Select TGT four times within 4 seconds.
STAB will be annunciated. To enable stabilization, select
TGT four more times within 4 seconds.
(13) SLV - Indicates that displayed data is controlled by the opposite
side controller.
22-14-00
Page 198.96
Aug 15/91
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of information
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on the title page of this document.
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