[BC] WCBS dumps IBOC, returns to "High Definition" AM

[Steve]

I think it's a good argument for bringing back wideband radios and 
forgetting digital on the AM band. OK..now crucify me. :)

Steve Newman
Steve Walker Productions
Opp, AL  36467

----- Original Message ----- 
From: "Bill Harms" <wharms at philcobill.com>
To: <broadcast at radiolists.net>
Sent: Wednesday, June 28, 2006 8:11 PM
Subject: Re: [BC] WCBS dumps IBOC, returns to "High Definition" AM


> Is this a good argument for skipping the analog-digital stage and
> going straight to the digital only stage?
>
> Bill Harms
> Elkirdge, Maryland
>
> On 28 Jun 2006 at 16:09, ] wrote:
>
>> After less than a week of transmitting the IBOC buzz, NYC's 880 WCBS has
>> returned to "High Definition" analog AM with crisp, clear 10 kHz audio.
>> A possible reason for this may be the numerous complaints they received
>> due to the 8-1/2 second delay the IBOC exciter added to their audio, 
>> which
>> made their Yankees play-by-play out of synch for people listening at the
>> game or while watching it on TV.  I first noticed the IBOC hash generator
>> was off during a Yankees game today, but now during normal "Newsradio"
>> programming it is still off, and their audio sounds a lot better too.
>>
>> When they had the IBOC on, their analog audio was still pretty crisp
>> (they had it in 8 kHz bandwidth mode) but it had a strange kind of
>> clipping distortion which made the announcers sound like they were 
>> holding
>> their nose while they spoke, and for an all-news format that can get
>> rather annoying.  There was also some rather obvious slack in the AGC;
>> when jumping from one programming element to the next, the audio would
>> often start out very quiet and gradually ramp up in level.  With their 
>> old
>> processing (Optimod 9100?) now back in service, there is still a little
>> gain-riding in these instances but it is a lot smoother and all of that
>> nasty distortion is gone.  And of course on a wideband receiver there is
>> no mistaking that beautiful full-bandwidth audio!
>>
>>
>>
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