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

Stevan A. White w5saw
Thu Jun 29 12:15:50 CDT 2006


Yep, me too!

Best Regards,
Steve White, W5SAW
SW Commercial Electronics


-----Original Message-----
From: Steve [mailto:shnewman at alaweb.com] 
Sent: Wednesday, June 28, 2006 8:20 PM
To: Broadcasters' Mailing List
Subject: Re: [BC] WCBS dumps IBOC, returns to "High Definition" AM


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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