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From: "Phil Allison"
Subject: Re: dBm and Microvolt/meter
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Tue, 1 Oct 2002 17:29:18 +1000
NNTP-Posting-Date: Tue, 01 Oct 2002 17:17:55 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"T.J. Harry" wrote in message
> "Phil Allison" wrote in message
> > ** The question makes no sense. You may as well ask us to compare
> > marmalade amd jam for you.
> > Why do you want to know this ?????
> > Regards, Phil
> Hai Everybody
> I can receive TV sound in my FM radio (87-108 MHz) when the cable TV
> transmission is in the VHF(Low) band, where the Audio is (Ch.Z)88.75,
> (Ch:Z+1)95.75 & (CH:Z+2)102.75 MHz respectively. Though the audio
> reception is clear enough, the VU meter of my FM radio hardly shows
> any noticale signal strength. The FM radio is placed near the TV-set,
> a few inches away. But the audio and video reception in the TV is
> quite good. This leads me into a conclusion that a TV receiver works
> at a lesser signal level. But I want to be sure about my conclusion.
> That is the reason for posting this question.
** I suspected something like this was behind the question!
The audio portion of a TV signal is seperate from the video - TVs
have a ( more or less) normal FM receiver inside them that picks up the
sound. The sensitivity is like any other FM broadcast receiver.
Your FM receiver is not even linked to the cable - but only placed
nearby. It picks up an accidental signal much weaker than the one fed to the
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