Kustom Signals Golden Eagle II Operator's Manual page 16

Section 3—Inspection & Mounting
5. Select the unsquelched (audio on) mode by momentarily
depressing the AUDIO then the MODE switch. If
necessary, depress the AUDIO switch then the RANGE
(up) switch to increase the audio level.
6. Start the patrol vehicle and position the A/C - heater fan
to a mid-range speed. Move the antenna/mounting
bracket to different positions on the windshield while
listening to the audio. If there is fan interference, the
audio will have a raspy sound instead of just noise.
Position the antenna to minimize the amount of fan
interference. Mark this position on the outside of the
windshield, using a grease pencil.
The fan interference filter developed for the Eagle II
radar series can be turned on or off at the discretion of
the operator. To check the status of this filter,
momentarily depress the RANGE switch. The word
"rnG" will appear in the TARGET window and the
range setting (1-6) will appear in the PATROL window.
While "rnG" is being displayed, depress the MODE
switch. This will change the TARGET display to
"FAn", remove the range number in the PATROL
display, and display "On" (fan interference filter ON) or
"OFF" (fan interference filter OFF) in the LOCK
window. To change the status of the filter, press the
MODE switch again. The system will time out and exit
this mode after approximately 2 seconds from the last
switch entry; or press HOLD to immediately return to
the radar mode.
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.
3.5