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Old 12th Jun 2012, 10:32 pm   #2
Peter.N.
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Join Date: Jul 2008
Location: Charmouth, Dorset, UK.
Posts: 3,601
Default Re: Video modulation question.

I can't say for sure but I would think its because the use of FM wasn't very widespread in the days of positive modulation so as the newer systems took to using negative modulation FM technology was readily available available and was much less likely to cause the 'sound on vision' effect of AM sound.

Peter
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