• Get involved.
    We want your input!
    Apply for Membership and join the conversations about everything related to broadcasting.

    After we receive your registration, a moderator will review it. After your registration is approved, you will be permitted to post.
    If you use a disposable or false email address, your registration will be rejected.

    After your membership is approved, please take a minute to tell us a little bit about yourself.
    https://www.radiodiscussions.com/forums/introduce-yourself.1088/

    Thanks in advance and have fun!
    RadioDiscussions Administrators

Question about AM all-digital HD

I am curious on what one would receive on a graveyard channel at night in the AM all-digital mode, when there is no local in the area, and assuming that all stations are broadcasting in digital. Would the receiver be able to discriminate between multiple signals, or would bits and pieces of digital information cause a jibberish sound resembling what is now heard in analog? <P ID="edit"><FONT class="small">Edited by Len14043 on 03/09/06 10:54 PM.</FONT></P>
 
> I am curious on what one would receive on a graveyard
> channel at night in the AM all-digital mode, when there is
> no local in the area, and assuming that all stations are
> broadcasting in digital. Would the receiver be able to
> discriminate between multiple signals, or would bits and
> pieces of digital information cause a jibberish sound
> resembling what is now heard in analog?
>


More than likely the receiver would just mute. Though I dont know if it has eve been tried.
 
> > I am curious on what one would receive on a graveyard
> > channel at night in the AM all-digital mode, when there is
>
> > no local in the area, and assuming that all stations are
> > broadcasting in digital. Would the receiver be able to
> > discriminate between multiple signals, or would bits and
> > pieces of digital information cause a jibberish sound
> > resembling what is now heard in analog?
> >
>
>
> More than likely the receiver would just mute. Though I
> dont know if it has eve been tried.
>

It's possible that you'd just hear a distant analog. If the receiver can't lock on a digital signal, it just stays in analog. The fear with AM IBOC is that you'd just hear a bunch of hash. Of course, at night that's what graveyard channels generally sound like!

(I was the engineer of a 1kw @ 1340, so I know what I'm talkin' about there!)<P ID="signature">______________
</P>
 
> > > I am curious on what one would receive on a graveyard
> > > channel at night in the AM all-digital mode, when there
> is
> >
> > > no local in the area, and assuming that all stations are
>
> > > broadcasting in digital. Would the receiver be able to
> > > discriminate between multiple signals, or would bits and
>
> > > pieces of digital information cause a jibberish sound
> > > resembling what is now heard in analog?
> > >
> >
> >
> > More than likely the receiver would just mute. Though I
> > dont know if it has eve been tried.
> >
>
> It's possible that you'd just hear a distant analog. If the
> receiver can't lock on a digital signal, it just stays in
> analog. The fear with AM IBOC is that you'd just hear a
> bunch of hash. Of course, at night that's what graveyard
> channels generally sound like!
>
> (I was the engineer of a 1kw @ 1340, so I know what I'm
> talkin' about there!)
>
In his question he asks what will happen when everyone is digital only. What will you hear when your receiver detects multiple IBOC data streams? I would assume the receiver would simply mute as there would be no coherent data stream...at least during periods where one carrier does not dominate.
The skywave IBOC from adjacent channels *may* pollute the data stream also....anyone adjacent to a clear running IBOC may see problems with digital only IBOC too.
 
> >
> In his question he asks what will happen when everyone is
> digital only. What will you hear when your receiver detects
> multiple IBOC data streams? I would assume the receiver
> would simply mute as there would be no coherent data
> stream...at least during periods where one carrier does not
> dominate.
> The skywave IBOC from adjacent channels *may* pollute the
> data stream also....anyone adjacent to a clear running IBOC
> may see problems with digital only IBOC too.
>


Whoops...missed that! Yeah, I also think the receiver would simply mute.<P ID="signature">______________
</P>
 
If there was some way to time sync the various digital streams and receivers so that the reciever could pick one station out of the mess, than that would be neat.

But then, picking an analog frequency out of a tough one, like 1490, is a trick anyway.


> > In his question he asks what will happen when everyone is
> > digital only. What will you hear when your receiver
> detects
> > multiple IBOC data streams? I would assume the receiver
> > would simply mute as there would be no coherent data
> > stream...at least during periods where one carrier does
> not
> > dominate.
> > The skywave IBOC from adjacent channels *may* pollute the
> > data stream also....anyone adjacent to a clear running
> IBOC
> > may see problems with digital only IBOC too.
> >
>
>
> Whoops...missed that! Yeah, I also think the receiver would
> simply mute.
>
 
> If there was some way to time sync the various digital
> streams and receivers so that the reciever could pick one
> station out of the mess, than that would be neat.
>
> But then, picking an analog frequency out of a tough one,
> like 1490, is a trick anyway.
>

Now THAT is an interesting concept!! Why couldnt it happen? The HD transmitters use GPS already.
 
> It's possible that you'd just hear a distant analog. If the
> receiver can't lock on a digital signal, it just stays in
> analog. The fear with AM IBOC is that you'd just hear a
> bunch of hash. Of course, at night that's what graveyard
> channels generally sound like!

But he's asking about digital-only mode, assuming (for the sake of argument) that there is no more analog. How will the receiver respond at night? That's one of the reasons I want AM IBUZ authorized for 24/7 operation immediately, so we can catch problems as they arise.

While I realize analog is with us for many future generations, listeners are going to want this astonishing new sound 24/7, not just daytime with old muddy AM at night, Especially with the trend toward 5KHz slop.

Aparrently WGN has gone IBUZ. People are already commenting on the tremendous drop in analog audio quality. Since it's the #1 station 12+ in the market it's going to be a good test of the advisability of an AM going IBUZ well before there's a market for it. A loss of a few out of contour diaries could mean they'll never be #1, again. As is they alternate with WGCI-FM for #1. Right now WGN has a 5.3 and WGCI-FM has a 5.2. There isn't much wriggle room. A few lost diaries and WGCI-FM is locked in as #1.

Rich

Rich
 
> Now THAT is an interesting concept!! Why couldnt it happen?
> The HD transmitters use GPS already.

That would mean a completely new generation of receivers. If manufacturers are unwilling to modify the way stations are displayed why would they include GPS and drive up the price - or prevent the price from dropping?

Kenwood has already told me IBUZ is a very small part of their product line. I would have thought replacing the hundreds of millions (if not 1.5 billion estimated) analog receivers would be a good market. With all the new technologies, they say it's not a huge market for them.

I suspect the same would be true for any major electronics company where adding a dollar to each unit is heresy.

Rich
 
> > Now THAT is an interesting concept!! Why couldnt it
> happen?
> > The HD transmitters use GPS already.
>
> That would mean a completely new generation of receivers. If
> manufacturers are unwilling to modify the way stations are
> displayed why would they include GPS and drive up the price
> - or prevent the price from dropping?
>
> Kenwood has already told me IBUZ is a very small part of
> their product line. I would have thought replacing the
> hundreds of millions (if not 1.5 billion estimated) analog
> receivers would be a good market. With all the new
> technologies, they say it's not a huge market for them.
>
> I suspect the same would be true for any major electronics
> company where adding a dollar to each unit is heresy.
>
> Rich
>


There are plans for new generations of receivers anyways...to add additional services that are "in the works". It doesnt surprse me that Kenwood consideres HD to be a small part of their business. Not a lot of demand yet.
 
> > It's possible that you'd just hear a distant analog. If
> the
> > receiver can't lock on a digital signal, it just stays in
> > analog. The fear with AM IBOC is that you'd just hear a
> > bunch of hash. Of course, at night that's what graveyard
> > channels generally sound like!
>
> But he's asking about digital-only mode, assuming (for the
> sake of argument) that there is no more analog. How will the
> receiver respond at night? That's one of the reasons I want
> AM IBUZ authorized for 24/7 operation immediately, so we can
> catch problems as they arise.
>
> While I realize analog is with us for many future
> generations, listeners are going to want this astonishing
> new sound 24/7, not just daytime with old muddy AM at night,
> Especially with the trend toward 5KHz slop.
>
> Aparrently WGN has gone IBUZ. People are already commenting
> on the tremendous drop in analog audio quality. Since it's
> the #1 station 12+ in the market it's going to be a good
> test of the advisability of an AM going IBUZ well before
> there's a market for it. A loss of a few out of contour
> diaries could mean they'll never be #1, again. As is they
> alternate with WGCI-FM for #1. Right now WGN has a 5.3 and
> WGCI-FM has a 5.2. There isn't much wriggle room. A few lost
> diaries and WGCI-FM is locked in as #1.
>
> Rich
>
> Rich
>
If they *lost* audio quality it was because of a change in audio processing equipment....I'll bet you money on that.
Most stations converting to IBOC are taking out their old Optimod 9100's and putting other boxes in. The Omnia AM3, for example, is clearly inferior, sonically, to a 9100.
And there is always the opportunity that a **programming consultant** came to town to "tweak" the processing.....very dangerous, indeed!!
 
> > It's possible that you'd just hear a distant analog. If
> the
> > receiver can't lock on a digital signal, it just stays in
> > analog. The fear with AM IBOC is that you'd just hear a
> > bunch of hash. Of course, at night that's what graveyard
> > channels generally sound like!
>
> But he's asking about digital-only mode, assuming (for the
> sake of argument) that there is no more analog. How will the
> receiver respond at night? That's one of the reasons I want
> AM IBUZ authorized for 24/7 operation immediately, so we can
> catch problems as they arise.
>
> While I realize analog is with us for many future
> generations, listeners are going to want this astonishing
> new sound 24/7, not just daytime with old muddy AM at night,
> Especially with the trend toward 5KHz slop.
>
> Aparrently WGN has gone IBUZ. People are already commenting
> on the tremendous drop in analog audio quality. Since it's
> the #1 station 12+ in the market it's going to be a good
> test of the advisability of an AM going IBUZ well before
> there's a market for it. A loss of a few out of contour
> diaries could mean they'll never be #1, again. As is they
> alternate with WGCI-FM for #1. Right now WGN has a 5.3 and
> WGCI-FM has a 5.2. There isn't much wriggle room. A few lost
> diaries and WGCI-FM is locked in as #1.
>
> Rich
>
> Rich
>


Rich,

You have not even heard WGN audio since they added HD. There is not a "tremendous" drop of audio quality. Perhaps if you are one of the 3 people in Chicago that have a GE Super Radio III and happen to have it on the wide position, you might notice the difference. I have listened to WGN since they added HD. There is very little difference. WGN does not exhibit and hiss on the main signal (and I have utilized about 7 different radios).
 
> You have not even heard WGN audio since they added HD.
> There is not a "tremendous" drop of audio quality. Perhaps
> if you are one of the 3 people in Chicago that have a GE
> Super Radio III and happen to have it on the wide position,
> you might notice the difference. I have listened to WGN
> since they added HD. There is very little difference. WGN
> does not exhibit and hiss on the main signal (and I have
> utilized about 7 different radios).

Time will tell. I now have the test I wanted. WGN and WGCI. In many formats programmers pay particularly close attention to anything that may have a subconscious effect on a listener. Especially those things that affect TSL.

Unlike engineering where you live by the laws of physics, programming is subjective. No listener has any obligation to explain why they've tuned away, assuming they know anything more than "it's uncomfortable."

Both WGN and WGCI are stable. They don't change programming often. I'm going to watch 5 full books, not rolling averages. In 15 months we'll have a relatively controlled experiment where IBUZ will be the only added factor. If one station or the other captures the #1 position securely, rather than swapping from book to book, we'll have a good indication what IBUZ does, or doesn't do, to listening.

In the meantime I'm going to let the cheerleaders run the forum and just lurk. I won't be participating and you'll have one less nutjob to deal with. If anyone needs to reach me for something other than an attack, my email is [email protected]. I will not respond on the list.

Rich
 
> > You have not even heard WGN audio since they added HD.
> > There is not a "tremendous" drop of audio quality.
> Perhaps
> > if you are one of the 3 people in Chicago that have a GE
> > Super Radio III and happen to have it on the wide
> position,
> > you might notice the difference. I have listened to WGN
> > since they added HD. There is very little difference.
> WGN
> > does not exhibit and hiss on the main signal (and I have
> > utilized about 7 different radios).
>
> Time will tell. I now have the test I wanted. WGN and WGCI.
> In many formats programmers pay particularly close attention
> to anything that may have a subconscious effect on a
> listener. Especially those things that affect TSL.
>
> Unlike engineering where you live by the laws of physics,
> programming is subjective. No listener has any obligation to
> explain why they've tuned away, assuming they know anything
> more than "it's uncomfortable."
>
> Both WGN and WGCI are stable. They don't change programming
> often. I'm going to watch 5 full books, not rolling
> averages. In 15 months we'll have a relatively controlled
> experiment where IBUZ will be the only added factor. If one
> station or the other captures the #1 position securely,
> rather than swapping from book to book, we'll have a good
> indication what IBUZ does, or doesn't do, to listening.
>
> In the meantime I'm going to let the cheerleaders run the
> forum and just lurk. I won't be participating and you'll
> have one less nutjob to deal with. If anyone needs to reach
> me for something other than an attack, my email is
> [email protected]. I will not respond on the list.
>
> Rich
>

Rich, If only you could stop calling people CHEERLEADERS just because they haev something nice to say about HD Radio......

Many of us have bought up issues that concern us... mainly to do with HD AM. Programming is your baby! You shold have plenty to say abotu that!
 
> > You have not even heard WGN audio since they added HD.
> > There is not a "tremendous" drop of audio quality.
> Perhaps
> > if you are one of the 3 people in Chicago that have a GE
> > Super Radio III and happen to have it on the wide
> position,
> > you might notice the difference. I have listened to WGN
> > since they added HD. There is very little difference.
> WGN
> > does not exhibit and hiss on the main signal (and I have
> > utilized about 7 different radios).
>
> Time will tell. I now have the test I wanted. WGN and WGCI.
> In many formats programmers pay particularly close attention
> to anything that may have a subconscious effect on a
> listener. Especially those things that affect TSL.
>
> Unlike engineering where you live by the laws of physics,
> programming is subjective. No listener has any obligation to
> explain why they've tuned away, assuming they know anything
> more than "it's uncomfortable."
>
> Both WGN and WGCI are stable. They don't change programming
> often. I'm going to watch 5 full books, not rolling
> averages. In 15 months we'll have a relatively controlled
> experiment where IBUZ will be the only added factor. If one
> station or the other captures the #1 position securely,
> rather than swapping from book to book, we'll have a good
> indication what IBUZ does, or doesn't do, to listening.
>
> In the meantime I'm going to let the cheerleaders run the
> forum and just lurk. I won't be participating and you'll
> have one less nutjob to deal with. If anyone needs to reach
> me for something other than an attack, my email is
> [email protected]. I will not respond on the list.
>
> Rich
>
This is STILL an asinine "experiment!!"
I'm not Mr. Programming....don't claim to be a rocket scientist at anything....but I've been around the block once or twice. Ratings are effected by PROGRAMMING MOSTLY!! And for a million different reasons WGN may gain or lose TSL,Cume, AQH share, males 25-54, pink pelicans making $75K+,engineers who fart when they type 44-65.......the list goes on and on! If WGN goes down it will be because of something "PROGRAMMING" related-unless, of course, they are off the air for a couple of weeks. That WOULD be a technical fault that WOULD effect the ratings!
So if WGN loses a point males 25-54, Rich will be back here IBUZing all over the boards with his "proof." Hope ya'll are smart enough to see through this "fluff."
Wanna know what's wrong with radio programming?? It's the PROGRAMMERS!!And it's not us "cheerleaders" or IBOC! Programmers create bad programming and are singularly responsible for the demise of radio!!!
Sorry your not going to post anymore Rich.....we will miss your cutting satire!
 
Status
This thread has been closed due to inactivity. You can create a new thread to discuss this topic.


Back
Top Bottom