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Old April 13th 09, 04:24 PM posted to rec.radio.shortwave
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Default Ibiquity IBOC - no hd radio upgrade needed!

I love it - In my area several stations that were transmitting
ibiquity digital junk have turned it off but they continue to have
spots proclaiming “now in crystal clear HD”. Thus leading consumers
to believe that they are hearing their radio station in “crystal clear
HD” – with no hd radio upgrade needed!

Talk about confusion! Good way to promote a product – let them think
they already have it! Struble you’re a genius.

Oh yea – hd radio is exciting! No need to buy one (if they were even
available) because you already have one!
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Old April 13th 09, 05:04 PM posted to rec.radio.shortwave
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Default Ibiquity IBOC - no hd radio upgrade needed!

On Apr 13, 11:24*am, wrote:
I love it - In my area several stations that were transmitting
ibiquity digital junk have turned it off but they continue to have
spots proclaiming “now in crystal clear HD”. *Thus leading consumers
to believe that they are hearing their radio station in “crystal clear
HD” – with no hd radio upgrade needed!

Talk about confusion! *Good way to promote a product – let them think
they already have it! *Struble you’re a genius.

Oh yea – hd radio is exciting! * No need to buy one (if they were even
available) because you already have one!


The Alliance and their radio partners are to blame for the lack of or
**** poor marketing!
When buying a new car if you ask the sales person about digital radio,
they'll sell you Satellite radio?
When HD units start coming standard in new cars is when the rubber
will hit the road..
consumers won't understand why the receiver flip flops between analog
& digital.
Enough blame can go around for everyone!


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Old April 18th 09, 05:52 AM posted to rec.radio.shortwave
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Default Ibiquity IBOC - no hd radio upgrade needed!

In article 49ea4fad.1607812@chupacabra,
Bob Dobbs wrote:

Telamon wrote:
In article ,
dave wrote:

wrote:
I love it - In my area several stations that were transmitting
ibiquity digital junk have turned it off but they continue to have
spots proclaiming ³now in crystal clear HD². Thus leading consumers
to believe that they are hearing their radio station in ³crystal clear
HD² * with no hd radio upgrade needed!

Talk about confusion! Good way to promote a product * let them think
they already have it! Struble you¹re a genius.

Oh yea * hd radio is exciting! No need to buy one (if they were even
available) because you already have one!

KFI, always Johnny-on-the-spot, just fired their IBOC up. Resulting in
an annoying wubba-wubba sound whenever one of their sidebands fades a
little (which is several times a minute).


For some reason they sound especially bad on the AR7030+ now.


They sound OK here, full HD, still takes a few moments to have the HD
icon light up and the ID to appear in place of the frequency. Once the
HD locks in it stays and the audio sounds better even during QSB.


Well, how about analog? I have some hiss in there all the time and often
times warbling rumble kind of noise. It's very annoying and I wish they
would turn that HD crap off.

--
Telamon
Ventura, California
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Old April 18th 09, 01:27 PM posted to rec.radio.shortwave
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Default Ibiquity IBOC - no hd radio upgrade needed!

Telamon wrote:


Well, how about analog? I have some hiss in there all the time and often
times warbling rumble kind of noise. It's very annoying and I wish they
would turn that HD crap off.


The IBOC signal is either side of the AM carrier. Each IBOC sideband is
identical but out-of-phase with the other. The theory is the IBOC
sidebands cancel each other out in your receiver. But if one sideband
propagates better than the other (which is always the case once you get
a few miles from the transmitter) the cancellation is not complete.
This is when you hear the digital hash and the wubba-wubba sound.

For those of us using a radio with selectable sideband synchronous
detection, but unable to choose USB and LSB at the same time (like my
Drake SW2) we are forced to listen in plain AM.

Clear Channel has 2 full blown flamethrowers crippled by IBOC in
California now. It's a shame. Citadel gets it. KGO and KKOH do not
use IBOC at night. KFI and KFBK do, and it really diminishes their signals.
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Old April 18th 09, 10:18 PM posted to rec.radio.shortwave
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Default Ibiquity IBOC - no hd radio upgrade needed!

In article ,
dave wrote:

Telamon wrote:


Well, how about analog? I have some hiss in there all the time and often
times warbling rumble kind of noise. It's very annoying and I wish they
would turn that HD crap off.


The IBOC signal is either side of the AM carrier. Each IBOC sideband is
identical but out-of-phase with the other. The theory is the IBOC
sidebands cancel each other out in your receiver. But if one sideband
propagates better than the other (which is always the case once you get
a few miles from the transmitter) the cancellation is not complete.
This is when you hear the digital hash and the wubba-wubba sound.

For those of us using a radio with selectable sideband synchronous
detection, but unable to choose USB and LSB at the same time (like my
Drake SW2) we are forced to listen in plain AM.

Clear Channel has 2 full blown flamethrowers crippled by IBOC in
California now. It's a shame. Citadel gets it. KGO and KKOH do not
use IBOC at night. KFI and KFBK do, and it really diminishes their signals.


They sound terrible in either side band selectable sync turned on with
the Drakes. There is significant low frequency noises that are not
easily describable along with the usual high frequency hiss. Kind of a
low frequency rushing sound like water through a pipe. This sucks.

Now the only radio I have they still sound halfway decent on is the
RX340 with its brick wall DSP filters. I can barely hear the low
frequency noise and the high frequency hiss is minimized in AM mode.

So here is the upshot:
The worst sound is on the Drakes with side band selectable sync turned
on. Next worse is with the AM sync on so the best is just AM mode with
no sync. Same for the AR7030+ except it does not have the selectable
side band sync. The best is the RX340 where both the low frequency noise
and the high frequency hiss is not as prominent.

I'm complaining to KFI about this.

--
Telamon
Ventura, California
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Old April 19th 09, 12:19 AM posted to rec.radio.shortwave
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Default Ibiquity IBOC - no hd radio upgrade needed!

In article 49eb5ac5.4793609@chupacabra,
Bob Dobbs wrote:

dave wrote:
Telamon wrote:


Well, how about analog? I have some hiss in there all the time and often
times warbling rumble kind of noise. It's very annoying and I wish they
would turn that HD crap off.


The IBOC signal is either side of the AM carrier. Each IBOC sideband is
identical but out-of-phase with the other. The theory is the IBOC
sidebands cancel each other out in your receiver. But if one sideband
propagates better than the other (which is always the case once you get
a few miles from the transmitter) the cancellation is not complete.
This is when you hear the digital hash and the wubba-wubba sound.

For those of us using a radio with selectable sideband synchronous
detection, but unable to choose USB and LSB at the same time (like my
Drake SW2) we are forced to listen in plain AM.


Sometime ago when KOGO 600 first went to band hog mode (IBOC-HD)
I tuned in to see just how bad it was and noticed that rumbling you
mentioned with the whip collapsed on the E1 for weak signal simulation,
but the DSB synch would remedy it, same with KNX.



I just tried KOGO 600, KFI 640, KNX 1070 and turning on the sync
detector didn't do anything to improve the audio. AM sounded the best.

Turning on side band selectable sync causes horrendous low frequency
noise.

By the way Australia is currently good on 17,795 as is NZ on 15,720.

--
Telamon
Ventura, California
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Old April 19th 09, 07:51 AM posted to rec.radio.shortwave
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Posts: 855
Default Ibiquity IBOC - no hd radio upgrade needed!


"Bob Dobbs" wrote in message
news:49eb5ac5.4793609@chupacabra...
dave wrote:
Telamon wrote:


Well, how about analog? I have some hiss in there all the time and often
times warbling rumble kind of noise. It's very annoying and I wish they
would turn that HD crap off.


The IBOC signal is either side of the AM carrier. Each IBOC sideband is
identical but out-of-phase with the other. The theory is the IBOC
sidebands cancel each other out in your receiver. But if one sideband
propagates better than the other (which is always the case once you get
a few miles from the transmitter) the cancellation is not complete.
This is when you hear the digital hash and the wubba-wubba sound.

For those of us using a radio with selectable sideband synchronous
detection, but unable to choose USB and LSB at the same time (like my
Drake SW2) we are forced to listen in plain AM.




The theory doesn't even work well within the local signal area, since almost
no radios use a detector that detects both sides of the envelope. Therefore,
you have only one sideband being detected, and the IBOC hash will be present
under the analog program material if the radio is sufficiently broadband
(more than about 8 KHz).




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