Re: [IRCA] AM IBOC editorial update

["Craig Healy" <bubba@xxxxxxxxxxxxxxxxxxxx>]

> The plan is to turn the analog off in time
> leaving just the HD IBOC. If that ever happens, then goodbye to any AM
> station outside of a few miles out of town. The AM dial here will be
> totally gone and AM radio will be totally dead. nil, zip, goodbye.

The way it goes to all-digital is to move the sidebands back in to the
center.  When that happens, there will be no adjacent channel hash, or at
least not much.  Everything will be on-channel.  The power of the digital
signal will also be increased significantly, though not to the power used
for analog.  KGO-810 will not be killing 800 and 820, and will no longer be
50kw.  The power for the digital signal will be calculated to give
equivalent coverage.  I have not figured what that will be.

I personally do not think that AM radio will survive the estimated ten year
plus transitional period.  At least not in a way that is fair to all
concerned.  That seems to be just what the iBiquity consortium is banking
on, that it will weed out the lesser-financed and more marginal stations
leaving the big, well-financed companies that have the resources to weather
this.  Financial jamming..

FWIW, I have asked one of the local IBOC station engineers if there is a way
to do a test in the all-digital mode.  This would give the few of us with HD
Radios the chance to see if IBOC DX can exist.

So endeth my once-monthly IBOC pest, er, post...

Craig Healy
Providence, RI

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