Owner manual

Stabilization of the radar beam compensates for moderate aircraft

maneuvers. The Line-of-Sight system used is not absolute, but has limi-

tations. Recognize limitation errors. Errors in the order of one-half

degree or less can produce this effect. With the beam just contacting

the horizon at 180 nautical miles, a 1/2 degree of further down tilt moves

this contact point in to 130 nautical miles. Isolated terrain targets would

now appear.

Introducing a 1/2 degree roll error compounds the effects; down on one

side, up on the other side (1 degree unbalance).

STABILIZATION FLIGHT TEST CHECKLIST

1. Fly the aircraft being tested to 10,000 feet AGL .

2. Select the MAP mode, STAB OFF, and set the indicator to 20 nm.

3. Set manual gain to maximum.

4. While flying level (0 degree pitch, 0

degree roll), adjust the tilt control

for a video pattern shown in Figure

Note: Record tilt position for future ref-

erence.

5. If the inner ring of video is not par-

allel to the range marks, the

mounting of the antenna is not

parallel to the horizontal axis of the

aircraft.

Effective Date: 9/98 RDR 2100 Pilot's Guide: Rev 1

Antenna Stabilization

Figure 1

RDR 2100 PG 3/12/07 3:45 PM Page 39