SECTION 8—INFLUENCES AND INTERFERENCE
8.3
5. Radio Frequency Interference (RFI) exists when there
are strong RF transmitters in the immediate area of the
radar unit, such as the patrol vehicle’s transmitting
radio, high power radio or television stations. Normally
these signals are processed as non-moving and not
displayed as targets. However, if the RFI signals are
strong enough, the Raptor RP-1 will detect these
sources of interference. The unit will not display any
new speed-readings and the “RFI ERROR” will be
displayed in the Message area, until the source of
interference is reduced or eliminated.
6. Heater and A/C fan motors can cause a radar unit to
display the fan’s speed, rather than a weaker target
vehicle’s speed. A trained operator should not be
confused by intermittent fan readings and the distorted
audio. Proper antenna mounting, placement, and
aiming will eliminate most of the potential fan
interferences.
NOTE:
If there are still problems with fan interference in
your type of patrol vehicle, Kustom Signals can
provide antenna noise reduction pads to prevent
the fan signal from reaching the antennas. Contact
your District Sales Manager or Kustom Signals'
Customer Service department for antenna pad
options.
NOTE: Refer to the National Highway Traffic Safety
Administration’s Basic Training Program in
RADAR Speed Measurement for further
information on interferences and training guides.
