Man-Made Influences - Kustom Signals Directional Golden Eagle II Operator's Manual

Section 8--Interference

8.2 MAN-MADE INFLUENCES

1. Various reflections can cause most radar to display
incorrect speed-readings. These include real Doppler
signals such as shadowing, combined speeds, moving
cosine error and interference signals such as vehicle fan
speed, electrical noise and radio frequency interferences.
Unlike other types of radar, the Directional Golden
Eagle II, using directional DSP processing, can sense
and eliminate most of the interferences that the radar
unit might see during normal operation. As an example,
most of these interference signals will be detected as
non-moving and will not be displayed as a speed.
However, if strong interference exists, the range
(distance) to a target may be reduced as long as the
interference is present.
2. Patrol speed shadowing may occur when the radar unit
receives a stronger signal from a large vehicle traveling
the same direction than the groundspeed return signal of
the patrol vehicle. This difference speed may be placed
in the patrol window and used instead of the proper
patrol speed. See Sec. 8.3.
NOTE: If the Directional Golden Eagle II is displaying a
low patrol speed due to shadowing, entering and
exiting hold quickly should resolve the problem.
3. The combined speed effect can occur when the patrol
vehicle and the target vehicle are approaching each other
at low speeds, usually in the 25 to 35 mph (40 to 56
km/h) range each, and at relative short distances, usually
less than 300 feet. The radar unit sees a strong
reflection from the combined speed signal and the radar
unit may display this speed instead of the true patrol
speed. See Sec. 8.3.
8.2