🚀 go-pugleaf

In article <lkrlsaINNkju@news.bbn.com>, djstracher@ccs1.bbn.com writes:
>Since radar detectors are passive in nature it would not be possible to have a
>radar detector detector. ( YES I have heard about these devices but don't
>believe they exist or can exist). 

In fact, it is possible. A radar detector is a radio receiver. Nearly
all radio receivers contain radio frequency oscillators as part of
their circuitry. An oscillator is the first stage in a radio transmitter.
The leakage from these oscillators can be detected with another suitable
radio receiver and antenna.

Using such technology, it is even possible to determine to what
frequency your radio receiver is tuned to (most radios and TV's use
standard designs and known frequencies).

In the UK, televisions are licensed. Unlicensed televisions are
routinely detected by roaming vans that listen for the TV's
oscillator(s). Intelligence agencies also employ this technology.

Dan Halbert