User's Manual

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8.2
8.1 MAN-MADE INFLUENCES
1. Radar units may display incorrect speed-readings from
various sources. These include shadowing, combined
speeds, moving cosine and fan interferences (splitting
speeds).
2. Patrol speed shadowing may occur when the radar unit
receives a stronger signal from a large vehicle traveling
the same direction than the groundspeed return signal of
the patrol vehicle. This difference speed may be placed
in the PATROL window and used instead of the proper
patrol speed. See Sec. 8.2.
3. The combined speed effect can occur when the patrol
vehicle and the target vehicle are approaching each
other at low speeds, usually in the 25 to 35 mph (40 to
56 km/h) range each, and at relative short distances,
usually less than 300 feet. The radar unit sees a strong
reflection from the combined speed signal and may
display this speed instead of the true patrol speed. The
FalconHR with speedometer input will eliminate this
effect, and the unit will display the proper patrol and
target speeds.
4. The FalconHR has an onboard battery monitor to alert
the operator when internal voltage nears the minimum
operating voltage. See Sec. 7.1.1 for details.