From: John Woodgate
Newsgroups: sci.electronics.design
Subject: Re: dBm and Microvolt/meter
Date: Sun, 29 Sep 2002 19:47:00 +0100
Organization: JMWA Electronics Consultancy
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Reply-To: John Woodgate
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I read in sci.electronics.design that Don Pearce
wrote (in ) about 'dBm and Microvolt/meter', on Sun, 29 Sep 2002:
>On 29 Sep 2002 05:43:09 -0700, sherwood@satyam.net.in (T.J. Harry)
>wrote:
>
>>I request help from the readers. For a TV receiver the picture sync
>>sensitivity is specified as -96dBm. For an FM radio the receive
>>sensitivity is 3 mcrovolt/meter. How do these figuers compare.
>>Which one is more sesitive (i.e. working with a lower signal level)
>>Thanks
>>Harry
>
>Sorry, this is apples and oranges. One is the sensitivity at the input
>terminal of the device, and the other is the sensitivity at the
>antenna/air interface. Either could be more sensitive, depending on
>the gain of the antenna you hang on the TV.
>
True, but if this FM radio is for Band II, (87.5 to 108 MHz), and we
assume a half-wave dipole antenna, then they are approximately equally
sensitive.
--
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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