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Noise confuse the computer in the radar gun so it does
not display any speed. This effect duplicates the normal
operation that the officer often observes.
Since it is normal to occasionally lose the target speed,
the officer is not suspicious. Reasonable care should be
used as flagrant violators could still be caught with an
estimated speed.
The laser scrambling circuit transmits a series of pulses
at the same wavelength used by the police laser guns
(Lidar), which are electronically timed at about 100 feet
apart. When the pulses pass through the windshield they
will lose up to 50% of their power. The power output is 6
to 10 times that needed to trigger the detector in the laser
gun. Lidar sends out laser pulses and measures how long
it takes to hit your car and come back. From the speed of
light, it can determine your
range
. It sends out several
more pulses and calculates your speed from the change
in distance over time. The Rocky Mountain Radar
scramblers only allow the Lidar to see up to 100 feet so it
is unable to calculate your speed.
