From: John Woodgate
Subject: Re: How does a mixer work?
Date: Tue, 22 Oct 2002 17:32:41 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Tue, 22 Oct 2002 19:15:42 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Kevin Aylward
wrote (in ) about 'How does a mixer work?', on Tue, 22 Oct 2002:
>I do actually remember some stories like this, vaguely. Apparently,
>people were sceptical that sidebands were real, and that if you had a
>really sharp filter you could still recover the modulation. This was, I
>understand even experimentally "proven". In reality, they just did not
>use a sharp enough filter.
Well, not quite, if you mean the receiver with very selective pre-
detector circuits and a peaky audio response. The point is that the
audio response is a factor in the overall selectivity curve of the
receiver, whereas the inventor thought it wasn't.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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