It is the L.O. (local oscillator), which typically swings from 11.8 GHz to 11.4ish GHz that radiates out the receive antenna. This leakage is what is "sniffed" by the radar detector-detector, also known as the VG-2 to uncover the usage of a radar detector in areas where they are illegal. Other detectors radiate at other frequencies depending on the first L.O. and I.F.'s used. Depending on the level, they can be sniffed quite a distance.... ----- Original Message ----- From: rad0 To: Sent: Monday, October 22, 2001 5:15 PM Subject: [ot]: how does a radar detector work? > does a radar detector emit anything? I can't see why it needs to, to 'detect' a police speed radar machine....? -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body