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PRIMUS
R
660 Digital Weather Radar System
A28–1146–111
REV 2
In–Flight Adjustments
7-12
Step Procedure
6 From the roll offset entry menu, push the STAB (STB)
button twice more to bring up the roll gain entry menu.
7 To change the roll gain value, pull out the GAIN knob and
rotate it. The roll gain adjustment range is from 90 to
110%.
8 While flying with a steady roll angle of at least 20°, adjust
for symmetrical display of ground returns at the 40–NM
range arc..
9 When change is completed, push in the GAIN knob. The
display returns to the previous message.
10 Push the STAB (STB) button to go to the next menu (pitch
gain).
Roll Gain Adjustment Procedure
Table 7–6
PITCH STABILIZATION CHECK
This in–flight adjustment is made in a bank when the ground returns do
not remain symmetrical during turns. The procedure is listed in table
7–7.
Step Procedure
1 Trim the aircraft for straight and level flight in smooth, clear
air over level terrain at an altitude of at least 10,000 feet
AGL.
2 Select the 50–mile range and GMAP mode.
3 Adjust the TILT control until your radar display shows a
solid band of ground returns starting at the 40–mile range
arc. See figure 7–9.
4 Place the aircraft between 5 and 10° pitch up. If there is
little change to the arc of ground returns, the pitch
stabilization is good.
Pitch Stabilization Check Procedure
Table 7–7 (cont)