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Talking turkey about HD Radio coverage

R

Radio-X

Guest
I'd just like somebody to let me know if:

A) HD Radio covers as much range as analog radio
B) What type of power consumption is required for HD compared to analog
C) Why most of today's HD signals don't go as far as analog radio

Thanks

Radio-X<P ID="signature">______________
Formerly shocking, rocking, and angering the R-I community as radiodxrichmond!</P><P ID="edit"><FONT class="small">Edited by Radio-X on 04/09/06 06:52 AM.</FONT></P>
 
> I'd just like somebody to let me know if:
>
> A) HD Radio covers as much range as analog radio

They can if you got a good enough antenna or reciever.

> B) What type of power consumption is required for HD
> compared to analog

If a station has 5,000 watts. The HD power is 50 watts and so on if thats what you're asking here.

> C) Why most of today's HD signals don't go as far as analog
> radio

The answer to B.<P ID="signature">______________

</P>
 
C is the answer to A<P ID="signature">______________
Proud 2 B a pioneering satellite radio subs¢riber
Ai4i is always on the trailing edge of technology
______________</P>
 
> C is the answer to A
>
If you get a good receiver, then you can get analog stations further away without getting their IBAC trash. Since IBUZ is only 1% of analog power, it is always limited in range.<P ID="signature">______________
17-year-old radio geek
Location: Princeton Junction, NJ
AIM: KewlDude471
WWPH 107.9 FM: http://wwph1079fm.no-ip.org</P>
 
> > C is the answer to A
> >
> If you get a good receiver, then you can get analog stations
> further away without getting their IBAC trash. Since IBUZ
> is only 1% of analog power, it is always limited in range.
>


OK folks there is a lot of misinformation flowing here....

One of the reasons digital is lower in power is because it is more efficient. Hense the reason you dont have 3 watt digital cell phones. Hense the reason that digital TV stations are lower power.

The problem with digital is that the digital is there or it is not there.

Presently HD Radio is using 1% power to see if it hashes the analog signal. I have seen no instances where it has caused a problem with an FM analog signal. I am hoping that they will allow more power for the digital singal. But people far smarter than I are figuring that out.

In addition, I have seen some stations where the digital signal is far more robust than others. I have one that is about 70 miles away where the HD light is flashing as well as the stereo light. So the signal is far more robust to the point of almost matching the analog signal.

There is still a lot to be learned as to how to make teh HD signal more robust. I think a few are strting to get what to do however.
 
> > > C is the answer to A
> > >
> > If you get a good receiver, then you can get analog
> stations
> > further away without getting their IBAC trash. Since IBUZ
>
> > is only 1% of analog power, it is always limited in range.
>
> >
>
>
> OK folks there is a lot of misinformation flowing here....
>
> One of the reasons digital is lower in power is because it
> is more efficient. Hense the reason you dont have 3 watt
> digital cell phones. Hense the reason that digital TV
> stations are lower power.
>
> The problem with digital is that the digital is there or it
> is not there.
>
> Presently HD Radio is using 1% power to see if it hashes the
> analog signal. I have seen no instances where it has caused
> a problem with an FM analog signal. I am hoping that they
> will allow more power for the digital singal. But people
> far smarter than I are figuring that out.
>
> In addition, I have seen some stations where the digital
> signal is far more robust than others. I have one that is
> about 70 miles away where the HD light is flashing as well
> as the stereo light. So the signal is far more robust to
> the point of almost matching the analog signal.
>
> There is still a lot to be learned as to how to make teh HD
> signal more robust. I think a few are strting to get what
> to do however.
>
I believe KCMS in Seattle recently had the opportunity to hear what happens when the ratio changes. As I understand it, their analog transmitter faulted and went to 25% power, but the digital remained normal, and the result was they could hear hash interfering with the analog signal.
 
What I'm starting to see is that stations which use their primary antennas as the IBOC signal generator seem to be more robust than those which don't. Also the transmitting height of the IBOC antenna makes a huge difference. Around me the IBOC stations with the highest heights, seem to have the best IBOC signals.
Just like in analog, I think the line of sight factor makes a much bigger deal with digital.
 
> What I'm starting to see is that stations which use their
> primary antennas as the IBOC signal generator seem to be
> more robust than those which don't. Also the transmitting
> height of the IBOC antenna makes a huge difference. Around
> me the IBOC stations with the highest heights, seem to have
> the best IBOC signals.
> Just like in analog, I think the line of sight factor makes
> a much bigger deal with digital.

Hey dude, are you noticing the same thing with DTV, distance wise? I realize it is apples to oranges but they are still both fruit.
 
> > > > C is the answer to A
> > > >
> > > If you get a good receiver, then you can get analog
> > stations
> > > further away without getting their IBAC trash. Since
> IBUZ
> >
> > > is only 1% of analog power, it is always limited in
> range.
> >
> > >
> >
> >
> > OK folks there is a lot of misinformation flowing here....
>
> >
> > One of the reasons digital is lower in power is because it
>
> > is more efficient. Hense the reason you dont have 3 watt
> > digital cell phones. Hense the reason that digital TV
> > stations are lower power.
> >
> > The problem with digital is that the digital is there or
> it
> > is not there.
> >
> > Presently HD Radio is using 1% power to see if it hashes
> the
> > analog signal. I have seen no instances where it has
> caused
> > a problem with an FM analog signal. I am hoping that they
>
> > will allow more power for the digital singal. But people
> > far smarter than I are figuring that out.
> >
> > In addition, I have seen some stations where the digital
> > signal is far more robust than others. I have one that is
>
> > about 70 miles away where the HD light is flashing as well
>
> > as the stereo light. So the signal is far more robust to
> > the point of almost matching the analog signal.
> >
> > There is still a lot to be learned as to how to make teh
> HD
> > signal more robust. I think a few are strting to get what
>
> > to do however.
> >
> I believe KCMS in Seattle recently had the opportunity to
> hear what happens when the ratio changes. As I understand
> it, their analog transmitter faulted and went to 25% power,
> but the digital remained normal, and the result was they
> could hear hash interfering with the analog signal.
>


Thats interesting. Perhaps their digital transmitter is out of the mask. I had an analog transmitter go down, and I could DX the analog channel to where I could hear a station 150 miles away on frequency even though the HD was still going.
 
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