Correction: the occupied spectrum is 1485-1515 KHz.

On Mon, 21 Mar 2005 19:29:11 -0500, Lloyd Rasmussen wrote:

>IBOC stands for "in-band, On-channel" and is a way to hide digital
>transmission inside an analog signal.  The "Digital Radio Mondiale"
>which you hear on some frequencies on shortwave, including 3995 KHz
>from Germany at night, is an all-digital broadcasting system.
>
>I don't know the details of IBOC on FM.  I can tell you about it on
>AM, because WTOP, 1500 KHz is now running this mode during daytime
>hours.  Part of the digital information sounds like white noise 30 or
>40 dB below the modulation, spread over the plus/minus 10 KHz region
>from the carrier frequency.  Then there is a stronger digital signal
>between plus/minus 10 and plus/minus 15 KHz of the carrier.
>Effectively, during the day, WTOP now occupies the spectrum from 1485
>to 1505 KHz.  And even though I should have a "full quieting" signal,
>being 1 mile from the 50 KW transmitter, it sounds like I'm 20 miles
>away because of the added on-channel noise.  I think IBOC is a bad
>idea, at least on AM, but supposedly it can sound as good as FM.
>
>
>On Mon, 21 Mar 2005 09:57:07 -0500, Lowell Miller wrote:
>
>>O.K. What is iboc?
>>I must not be on the cutting edge!
>>73
>>Lowell  W8QIY
>>----- Original Message -----
>>From: "Jeff Kenyon" <[log in to unmask]>
>>To: <[log in to unmask]>
>>Sent: Sunday, March 20, 2005 5:31 PM
>>Subject: IBOC AM question
>>
>>
>>> Hi everyone, I have been hearing a few things here and there about IBOC
>>> digital on AM and some short-wave stuff, and I have a few stations around
>>> the Detroit area that I think are using the IBOC.  This includes WWJ and
>>> WCHB 1200 and our family life station WUFL, 1030.  Has anyone used a
>>> receiver that will work with IBOC and what have your opinions been and do
>>> you all have any suggestions as to what to invest in?
>
>Some people think that the devil is in the details.  Actually, God is in the details.
>Lloyd Rasmussen, Kensington, Maryland
>home: <http://lras.home.sprynet.com/>
>Work:  <http://www.loc.gov/nls/z3986>

Some people think that the devil is in the details.  Actually, God is in the details.
Lloyd Rasmussen, Kensington, Maryland
home: <http://lras.home.sprynet.com/>
Work:  <http://www.loc.gov/nls/z3986>