Speaking of turning off AM HD, and speaking of AM Stereo, we just keep broadcasting in C-Quam here at WNMB in North Myrtle Beach. With lots of existing AM Stereo radios out there in Fords and Chryslers, we actually have been noticed in stereo and several listeners have driven by for us to listen to their car radios. So, I invite all the stations who have turned off HD to go c-quam. Properly processed in a clean audio and rf chain, it sounds super.
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AM HD TURNOFF PACE ACCELERATES
- Thread starter Savage
- Start date
You've got that right Bill; and some of the HD radios actually decode C-Quam; too bad that they all don't, then stations like WLS would be great to listen to as they go from HD in AM to CQuam at night. Their commercial spots sound quite decent in stereo at night from 250 miles away!
Once again, here is a link to an aircheck from WNMB AM stereo 900:
http://www.wnmb900.com//sounds_of_wnmb.htm
Wish Bill would put up a couple more of these. They sound great!
http://www.wnmb900.com//sounds_of_wnmb.htm
Wish Bill would put up a couple more of these. They sound great!
"-10 dBc digital!!" "Somebody else just came out with another HD portable!" "HD-4!!" "Oltcit, Lada and Trabant now have HD as a factory-optional-available option thingy!"
Back in August 1977 an MD resident walked by an acute-care suite in a Memphis hospital ICU and saw a team feverishly doing cardiac massage and pumping adrenaline into an obese man on a gurney. 40 minutes later he passed the scene again. Entering the room, he watched the nurses and ED doctor glumly and vainly trying to resusictate the victim, looked at the flatlined cardiac monitor and chart and asked: "Why are you still working on this cadaver?"
A nurse replied: "Because it's Elvis Presley."
All of the measures and claims set forth above mirror the sadly desperate attempts to drag The King back from the next world to this. NPR, Alliance stations, iBiquity, Radio World and clueless policy wonks at the FCC can - to the last man - keep on applying those rhetorical paddles all they want, but at lights-out, you will still find....when it comes to HD Radio.....
A Dead Elvis.
Back in August 1977 an MD resident walked by an acute-care suite in a Memphis hospital ICU and saw a team feverishly doing cardiac massage and pumping adrenaline into an obese man on a gurney. 40 minutes later he passed the scene again. Entering the room, he watched the nurses and ED doctor glumly and vainly trying to resusictate the victim, looked at the flatlined cardiac monitor and chart and asked: "Why are you still working on this cadaver?"
A nurse replied: "Because it's Elvis Presley."
All of the measures and claims set forth above mirror the sadly desperate attempts to drag The King back from the next world to this. NPR, Alliance stations, iBiquity, Radio World and clueless policy wonks at the FCC can - to the last man - keep on applying those rhetorical paddles all they want, but at lights-out, you will still find....when it comes to HD Radio.....
A Dead Elvis.
Uh-oh!! 
Consulting Barry McLarnon's site - last updated 6 days ago - the count on operating AM-HD stations is now down to 256, the lowest number since IBOC was authorized at night 2 1/2 years ago. Five more stations have dropped HD during calendar March.
And, continuing the trend - most of the remaining AM stations are "digital daytimers," not bothering with expensive rebuilds of antenna systems to enable nighttime HD. About half of the 24-7 HD operators are on graveyard channels, so really, among signals hearable generally throughout their markets - 10kw or higher - there are fewer than one HD-AM station PER STATE, statistically speaking.
And even those dismal numbers are dropping. Keep up the press releases, "Baghdad Bob" Struble.
Consulting Barry McLarnon's site - last updated 6 days ago - the count on operating AM-HD stations is now down to 256, the lowest number since IBOC was authorized at night 2 1/2 years ago. Five more stations have dropped HD during calendar March.And, continuing the trend - most of the remaining AM stations are "digital daytimers," not bothering with expensive rebuilds of antenna systems to enable nighttime HD. About half of the 24-7 HD operators are on graveyard channels, so really, among signals hearable generally throughout their markets - 10kw or higher - there are fewer than one HD-AM station PER STATE, statistically speaking.
And even those dismal numbers are dropping. Keep up the press releases, "Baghdad Bob" Struble.
If you are so certain that you hate IBOC, there is on Short Wave some stations in Alaska that is experimenting with Digital Radio Mondial. They have stations in Europe that uses Radio Digital Mondial on AM. And also in Canada on Radio Canada International has a Digital Radio Mondial frequency on Shortwave. If you try this on AM you might not to be all that sorry you didn't over look this in the scheme of things. Of course you would have to get an experimental license in order to try this.
richllewis said:
DRM isn't analog compatible. That is why we use AM IBOC in the US. The FCC would not provide seperate spectrum for Digital broadcasting. If they would have, none of this would have been a problem.
On FM HD radio works pertty well but simply speaking anything that takes more bandwidth is going to cause more interference to all other stations close in frequency around them and not make too many friends. Going digital on both AM and FM makes sense but taking up more bandwidth to do it doesn't. FM can provide multipal formats by going digital great, AM on the other hand can not but can be greatly improved using AM stereo going digital but not trying to cram so much audio in such a little space, AM stereo in digital but not HD would be a great compromise that would work with a lot less problems. The sound would be greatly improved without the bleed over problems HD causes.
For digital radio to work you need two things:
First you still need to have a good radio receiver, AND you need a computer receiving enough data in multiple sidebands to reconstruct useful audio intelligence.
Naturally it is packaged to appear as one device, but it really is two devices, and the whole point of the computer is to supposedly
eliminate noises in the audio caused by the same effects that will also cause the digital signal integrity to fail.
Or multicasting.... Whatever, it seems like it's just a way to sell more large scale integration devices,
in an attempt to pretend that the ugly messy old fashioned "radio" part of the system isn't there any longer.
It should use less processing power to model some sample interference noise types, and then subtract them from the analog.
But that wouldn't have paid for an unknown number of computer types in cubicles, crafting an AM system virtually designed to fail.
First you still need to have a good radio receiver, AND you need a computer receiving enough data in multiple sidebands to reconstruct useful audio intelligence.
Naturally it is packaged to appear as one device, but it really is two devices, and the whole point of the computer is to supposedly
eliminate noises in the audio caused by the same effects that will also cause the digital signal integrity to fail.
Or multicasting.... Whatever, it seems like it's just a way to sell more large scale integration devices,
in an attempt to pretend that the ugly messy old fashioned "radio" part of the system isn't there any longer.
It should use less processing power to model some sample interference noise types, and then subtract them from the analog.
But that wouldn't have paid for an unknown number of computer types in cubicles, crafting an AM system virtually designed to fail.
O
Osama
Guest
I'm not sure that I should name them, but I have been told by an engineer at one of the major religious broadcasting companies, one that was heavily invested in HD/IBOC in its early days, is now completely dumping the technology...
Or hire someone whose specific charge and responsibility IS the HD signal and its maintenance! ( Guffaw)
I can't wait to hear what the 10.2 khz analog AM HD sonds like. I'm pretty sure WBBM 780 will be one of the first if it gets implemented.
The hiss is back, but I'll have to check it out a few different radios to see what this hiss/side tuning ratio is now.
At first glance it appears to be no different than before at least on a wideband af radio.
( Guffaw)I can't wait to hear what the 10.2 khz analog AM HD sonds like. I'm pretty sure WBBM 780 will be one of the first if it gets implemented.
The hiss is back, but I'll have to check it out a few different radios to see what this hiss/side tuning ratio is now.
At first glance it appears to be no different than before at least on a wideband af radio.
C
Channel Surf
Guest
mmnassour said:
Well...the largest commercial broadcast company in the country, had no difficulty in firing vast numbers of people last year...to run repeater radio...but they certainly keep the HD going....
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