Kustom Signals Golden Eagle II Operator's Manual page 45

NOTE: Some degradation of target capture may be
noted with the filter activated. For maximum
performance, if the patrol vehicle has little or no
fan interference, it is suggested that the fan
interference filter be turned off.
NOTE: The advanced Digital Signal Processing in the
Golden Eagle II can reduce the problems of fan
noise. 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.
Section 7--System Operation
7.4