The Null Device

The Victorian police are looking into claims that a model of Nokia mobile phone can detect police radar. Radar detectors are illegal in Victoria.

A police spokesman said yesterday that anyone using such a device in Victoria would be liable to a heavy fine and would have the device, in this case the mobile phone, confiscated. Police had equipment capable of detecting the use of such devices, he said.

(Is that so? The only way I can think of detecting radio receivers keyed to a specific frequency would involve scanning for a tuning oscillator; and would that work on a mobile phone, which uses frequency-hopping and is driven by DSP chips?)

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