User's Manual

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5.1
5. GENERAL THEORY OF OPERATION
5.0 GENERAL
The FalconHR moving radar system transmits a K-Band
radio frequency in compliance with the Federal
Communications Commission (FCC) regulations. In
moving mode a portion of the transmitted signal reflects
from the surface of passing stationary objects back to the
antenna. This returning signal is the "groundspeed"
Doppler. From the antenna, it travels to the Digital Signal
Processing (DSP) where the signal is translated to the speed
of the patrol vehicle (groundspeed) and is displayed in the
PATROL window.
Kustom Signals radar has a patented feature using the
patrol vehicle’s speed sensor pulses, which steers the DSP
processor to look for the “groundspeed” Doppler signal in a
specific speed range. This feature will eliminate the often-
annoying anomalies such as shadowing, combined patrol
speeds, splitting speeds, and displaying speeds in the
PATROL window when stopped at a traffic light or sign.
In moving opposite direction mode, a portion of the
transmitted signal strikes an oncoming vehicle (target
vehicle) and returns a Doppler frequency higher than the
groundspeed because the two objects (patrol vehicle and
target vehicle) are converging. This returning signal is the
"target" Doppler. The processing unit measures this speed
of convergence, or combined speed.