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HD Radio

R

radiolover78

I've never seen or listened to an HD radio. What are they basically like?

Are they like regular FM channels, just in high definition?

Please give me a general overview of what exactly HD radio is.

Thanks
 
> I've never seen or listened to an HD radio. What are they
> basically like?
>
> Are they like regular FM channels, just in high definition?
>
> Please give me a general overview of what exactly HD radio
> is.
>
> Thanks
>


Start at www.hdradio.com

OK lets see here (rolling up sleeves)

HD Radio is a digital broadcast on the same channel as the analog broadcast. You need a new radio to receive the digital broadcasts, but that radio also receives the analog (standard FM).

HD (NOT HIGH DEFINITION) Radio has the ability to broadcast additional channels on the same frequency.

So if you have a local station on 97.3 you will notice no difference to the standard broadcast if they add digital. However if you bought an HD Radio receiver you COULD pick up the follwoing channels:

HD-1 (which is the same programming a the standard analog)

HD-2 which is DIFFERENT programming than the standard analog

Possibly an HD-3 channel which is lower fidelity and probably would be a talk station)

Benefits fo HD Radio are:

More channels
No interference or multipath
Better audio

Issues with HD Radio:

Limited receivers avaialble (for now)
Radios are expensive (Starting at $299 and they are dropping in price)
HD Radio signals may not travel as far
HD Radio transmissions are only available during the day due to interference issues at night.

Hope this helps
 
> HD Radio transmissions are only available during the day due
> to interference issues at night.

Just to be safe, this only applies to HD on the AM dial.
 
> > HD Radio transmissions are only available during the day
> due
> > to interference issues at night.
>
> Just to be safe, this only applies to HD on the AM dial.
>

Sorry I wasnt clearer. Thank you for keeping us straight.
 
> > > HD Radio transmissions are only available during the day
>
> > due
> > > to interference issues at night.
> >
> > Just to be safe, this only applies to HD on the AM dial.
> >
>
> Sorry I wasnt clearer. Thank you for keeping us straight.
>
so even if its a clear channel frequency with 50,000 watts and no other station on that frequency, it still want work at night? ie..650 wsm?<P ID="signature">______________
note to the NAB..satellite radio..its worth paying for!!</P>
 
> > > > HD Radio transmissions are only available during the
> day
> >
> > > due
> > > > to interference issues at night.
> > >
> > > Just to be safe, this only applies to HD on the AM dial.
>
> > >
> >
> > Sorry I wasnt clearer. Thank you for keeping us straight.
>
> >
> so even if its a clear channel frequency with 50,000 watts
> and no other station on that frequency, it still want work
> at night? ie..650 wsm?
>
No AM station is allowed to run HD Radio at night at this point. There is an issue of interference as the HD Radio sugnal is rather broad and could interfere with stations adjacent to the station.
 
The problem is not that the station on 650 would interfere with other 650s, but with stations on 640 and 660. It was the CRTC who pressed the issue, as Canada still has huge "white" (underpopulated) areas. This is not a racist term; the FCC created and/or used it when they created the class A channels.<P ID="signature">______________
Proud 2 B a pioneering satellite radio subs¢riber
Ai4i is always on the trailing edge of technology
_______________</P>
 
> so even if its a clear channel frequency with 50,000 watts
> and no other station on that frequency, it still want work
> at night? ie..650 wsm?

First, there are no clear channel stations anymore. Virtually every former clear has been duplicated. There's only a company called Clear Channel.

I believe it will work, with major modifications in patterns. I believe we need to begin working on solving the problem one station at a time. Assuming the digital signal obeys the same directional rules as analog it shouldn't be a serious issue. Some people have questioned whether or not a full digital signal might be found in an analog null. That would be a problem. Let's go digital on AM 24/7 and fix the problems as they occur.

People seem afraid of that.

Rich
 
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