Honeywell PRIMUS 660 Pilot's Manual page 111

R
PRIMUS 660 Digital Weather Radar System
Step
4 Adjust the tilt down until a solid band of ground returns are
shown on the screen. Then adjust the tilt until the green
region of the ground returns start at about 40 NM.
5 Select STAB (STB) 4 times within 3 seconds. A display
with text instructions is displayed. See figure 7–4. The
radar unit is in the roll offset adjustment mode.
6 Pull out the GAIN knob to make a roll offset adjustment.
See figure 7–5 for a typical display. The offset range is
from –2.0° to +2.0° and is adjustable by the GAIN knob.
The polarity of the GAIN knob is such that clockwise
rotation of the knob causes the antenna to move down
when scanning on the right side.
7 While flying straight and level, adjust the GAIN knob until
ground clutter display is symmetrical.
8 Push in the GAIN knob. When the GAIN knob is pushed in,
the display returns to the previous message.
9 Push the STAB (STB) button to exit, or to go to the next
menu (pitch offset), if the full stab trim mode is enabled in
your installation.
NOTE: Once set, the roll compensation is stored in nonvolatile memory in the RTA.
It is remembered when the system is powered down.
In–Flight Roll Offset Adjustment Procedure
In–Flight Adjustments
7-6
Procedure
Table 7–3
A28–1146–111
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