[BC] Propagation and sideband distortion...

[Bob Tarsio]

It's when the carrier and sideband or sidebands are in quadrature phase that
selective fading causes distortion. I don't know why there would be any
difference in the condition if one sideband is removed. With envelope
detection you get distortion, with synchronous detection the demodulated
output is a function of phase. When the carrier and sidebands are at 90
degrees relative to one another you get no output. 

Bob Tarsio
President
 

www.Broadcast-Devices.com
 
Tel. (914) 737-5032
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-----Original Message-----
From: broadcast-bounces at radiolists.net
[mailto:broadcast-bounces at radiolists.net] On Behalf Of Glen Kippel
Sent: Monday, April 30, 2007 12:46
To: Broadcasters' Mailing List
Subject: Re: [BC] Propagation and sideband distortion...

On 4/29/07, Jerry Mathis <thebeaver32 at gmail.com> wrote:
>
> ISTR that WSM Nashville did this once as an experiment. IIRC the idea was
> abandoned because of excessive selective fading.


------------

Maybe I'm not quite awake yet this morning, but I fail to understand this.
Selective fading happens when there is an incoherent phase relationship
between the two sidebands.  When one sideband is removed, this ought not to
happen.  N'est-ce pas?
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