Very interesting howard - thanks.
PatAt 06:34 PM 5/2/2015, you wrote:
>Not all the HD broadcasts necessarily send out information about what is
>being broadcasted. This is not a requirement.
>
>The HD1 channel is always a duplicate of the analog main channel, HD2, HD3,
>and HD4 may broadcast whatever. The ERP (Effective Radiated Power) of the
>HD channels is usually one hundredth that of the analog channel but may be
>as high as one tenth if no interference is caused by doing so. If another
>station feels that a station raising its HD channels E R P to one tenth that
>of the main analog channel causes them interference, it is up to them to
>prove it and not up to the one potentially causing the problem to defend
>themselves.
>
>When HD is added to an FM station, the bit stream rate available for the HD
>channels is affected by the number of HD channels. The more channels, up to
>4 that are added, the quality of some of the HD channels may suffer as a
>result. A higher bit stream will be allocated to music as opposed to talk
>or sports. There is only so much bandwidth available since the stations
>have to stay within the FCC allocated channel spacing on the FM band.
>
>If the ERP of the HD channels is raised to much, it would be possible that
>the HD channels would broadcast further than the analog channel.
>
>This is information that I have gathered by surfing the net and not
>necessarily one hundred percent correct. Use it accordingly.
>
>Howard #3, W A 9 Y B W
>
>
>
>----- Original Message -----
>From: "Jim Shaffer" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Saturday, May 02, 2015 2:44 PM
>Subject: Re: Spark Talking Radio Again
>
>
> > Those HD stations also send out information about what's currently playing
> > don't they? Are there any digital radios with a computer interface so we
> > could get that info as well?
> > --
> > Jim, ke5al
> > -----Original Message-----
> > From: Tom Behler
> > Sent: Saturday, May 02, 2015 12:25 PM
> > To: [log in to unmask]
> > Subject: Spark Talking Radio Again
> >
> > Steve and all:
> >
> >
> >
> > One thing that does bother me about the radio is the claim that it has
> > voice
> > prompts for the visually-impaired, but that the menus don't speak. This
> > could cause issues if the menu button is accidentally pressed, and you
> > could
> > end up changing things you don't want to change, with no way to
> > correctthings without sighted assistance. I think Doug did us all a favor
> > by contacting the manufacturer about this only partially accurate claim,
> > and
> > it will be interesting to see if he does get any kind of meaningful
> > response
> >
> >
> >
> > Tom Behler: KB8TYJ
> >
> >
> >
> >
> > ---
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