There have been claims that a power surge occurs when the RADAR unit is first switched on from the hold switch position and that this power surge will result in inaccurate and supposedly high readings. Recent tests conducted by the National Highway Traffic Safety Administration (NHTSA) indicated that no false readings were noted during their tests. In digital type RADAR, the verification circuitry prohibits the RADAR reading from being displayed until a sampling is done over a period of time sufficient to analyze the signal to make certain that it is a Doppler signal rather than electrical noise. This precludes the RADAR from reading a high number, or any number in fact, until the signal is stabilized. The anti-detector switch effect is not a factor in modern RADAR operation, but it is emphasized that the target should be observed for a period of time prior to the reading being obtained and sufficient information should be obtained to develop target history to support any alleged violation.
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