So, i suspect that high gain AM antennas with built in preamps will become
much cheaper and will be recommended.
I can just imagine the advertizing for them now.
The whole debate around weather you will need a good signal all the time
strikes me as a bit odd, since, even though it is A M, the digital signal
won't have to be nearly as strong to be decoded when compared to an audio
signal.
I also expect there are noise cancelling circuits built into the iboc radios
to attempt to eliminate noise from outside the pass band that the digital
signal will need.
I don't know allot about the type of digital signal it is, but if it is like
most digital streams, it will only take up a certain segment of the audio
band and everything else can be blanked out.
So, phase shifting and fading may have already been compensated for.
Am i totally wrong about all this?
It seems to me that engineers designing iboc and those intending to use it,
aren't a bunch of intelectually challenged morons who don't know the first
thing about RF communications.  I am posative much of the problems brought
up here have been addressed and worked out already.
73 Colin, V A6BKX
----- Original Message ----- 
From: "Steve Dresser" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, April 05, 2007 11:22 AM
Subject: Re: Fw: [NYDXA-List] FCC Approves IBOC Go Ahead


> Steve,
>
> I've had two HD radios for about a month now, and from what I've seen, you
> need a pretty noise-free signal to make it work reliably, and that's
> especially true for AM where, ironically, there's more noise.  On FM, it
> works quite well with my tuner, but that's because I have a 9-element beam
> up on the roof.  If I didn't have that antenna, digital radio would hardly
> be worth considering because I'd have a hard time even with many local
> stations.  Let's face it, you can't get away from the noise unless the
> antenna is outside, and noise is the enemy here.
>
> Steve
>
> ----- Original Message ----- 
> From: "Steve" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, April 05, 2007 11:18
> Subject: Re: Fw: [NYDXA-List] FCC Approves IBOC Go Ahead
>
>
> > From what I recall, from an older article in one of the hifi mags, =
> > digital AM doesn't have nearly the range of a standard AM signal.  =
> > Also,, I suspect the adjacent channel interference will mean that a =
> > digital stream will need to be fairly strong to work.
> >
> > Steve, K8SP
> >
> >
> >
>
>
> -- 
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1:09 PM
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>