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- Path: sparky!uunet!computer-privacy-request
- Date: Mon, 28 Dec 1992 10:35:04 GMT
- From: Phil Karn <karn@qualcomm.com>
- Newsgroups: comp.society.privacy
- Subject: Re: Radar Detector Prohibitions
- Message-ID: <comp-privacy1.120.2@pica.army.mil>
- Organization: Qualcomm, Inc
- Sender: comp-privacy@pica.army.mil
- Approved: comp-privacy@pica.army.mil
- X-Submissions-To: comp-privacy@pica.army.mil
- X-Administrivia-To: comp-privacy-request@pica.army.mil
- X-Computer-Privacy-Digest: Volume 1, Issue 120, Message 2 of 8
- Lines: 14
-
-
- These "radar detector detectors" probably operate by looking for
- spurious microwave local oscillator radiation from the detectors. Any
- superhet or synchrodyne detector is going to have a local oscillator,
- and shielding it sufficiently is probably too expensive. Too much
- leaks back through the mixer to the antenna.
-
- An alternative would be to spread the local oscillator and then
- despread it at the first IF. Hopefully the spurious radiation would
- then be too far below the noise floor of the detector detector.
-
- Phil
-
-