Kustom Signals Falcon HR Operator's Manual page 59

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 FalconHR will detect these sources
of interference, the TARGET window will display "rFi"
and all speed-readings will be blanked, except for
locked speeds, 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.
7. Vehicle ignition interference, See Sec. 3.3 for further
details.
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.
8.3