Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "lists" <stuart.winsor.lists@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, April 22, 2006 1:42 PM
Subject: Re: [Homebrew_PCBs] Re: RE : Epson Stylus C84 (questions for Steve)


> In article <444A1ABB.5030802@...>,
> Russell Shaw <rjshaw@...> wrote:
>
>> Slightly OT, but how do those TV vans detect LCD TVs, TV played on a pc
>> monitor or laptop, and hand-held TVs?
>
> My understanding is that they DF on the stray radiation from the IF strip
> of the receiver.

No, they pick up the LO signal from the antenna. They can tell which station
the TV is tuned to. They don't use vans any more, though.

Leon