INTERFERENCE SOURCES AND REMEDIES
A variety of sources, both natural and man-made, can cause misleading indications or poor performance. The operator should note the
symptoms described below, and take steps to avoid the problem, or ignore the misleading indications.
Terrain
Radar signals will not pass through most solid objects, including tree foliage. Make certain the path between the radar and target
vehicle is unobstructed. A glass window is a partial reflector of radar. Therefore, some reduction in range will be experienced when
aiming through patrol vehicle windows.
Rain
Rain absorbs and scatters the radar signal. This reduces the range and increases the possibility of obtaining readings from the speed of
the raindrops.
Electrical Noise
Electrical noise sources include neon signs, radio transmitters, power lines, and transformers. These influences may cause reduced
range or intermittent readings. When these interferences are present, the RFI indicator should come on and suppress all readings.
Vehicle Ignition Noise
An extremely noisy vehicle electrical system may cause erratic operation. If this condition occurs, it is recommended that a two
conductor shielded (fused) cable be run directly from the vehicle battery to the cigarette lighter plug on the dash. This should
eliminate any problems from vehicle electrical noise.
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