[BC] Skywave dying

[Mike McCarthy]

New spectrum was not made available for HD TV. The FCC simply modified the 
rules based on digital's inherent improved to D/U IX ratios on adjacent as 
well as co-channel operation. In fact there is a 100 Mhz loss of spectrum 
in the TV band above TV 52 with that spectrum being allocated to Public 
Safety and commercial LMR.

The sunset date for NTSC was done to facilitate the migration to more 
spectrally efficient digital modes. Aural broadcasting doesn't gain 
anything, and in fact is worse spectrally because of adjacent channel 
occupancy which will impact/interact with analog operations of distant 
stations on AM.  The problem isn't that bad on FM unless there is a 
substantial 2nd adjacent short spacing which most urban Class A stations 
possess.

MM



At 06:42 PM 3/22/2007 -0500, Stan Tacker wrote
> >>
> >> However, they havent MANDATED IBOC on AM or FM
> >> yet...
>
> >Just wait..that too will come.\
>
>
> >Powell
>
>Nah, we'll never see an IBOC conversion mandate.  A conversion mandate
>exists for TV, but that is because new spectrum was made available for the
>service.  Reselling the old spectrum justifies the forced conversion.
>
>No new spectrum was made available for radio.  That's why we're saddled with
>a much less than desirable system.
>
>FM IBOC may be around for a while, but there is very little incentive for an
>AM operator to install the system.  Remember how many stations installed AM
>stereo then turned it off because they lost a bit of loudness?  Will IBOC,
>with it's greater demands on the transmission system, be any different?  My
>money says no.  It won't be around long.
>
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