Re: [IRCA] IBOC from WTOP

[Alan Bosch <labosch@xxxxxxxxxxx>]

Bill:

Now it makes sense.  I thot you were centered on 1500.

Let's see what I hear further from WTOP.

Then I will ask them what they're putting on those sidebands.

LAB

Bill Harms wrote:

>Alan:
>	The channel is 1490 khz. What you see on that image  is a 10 minute 
>(actually 9 minute 59 second long) clip measuring signal strength (based on the 
>audio) that started at 0555 Eastern time (the 0 minute mark at the bottom) and 
>ended at 0605 Eastern time (the 10 minute mark). WTOP turned on the IBOC at the 
>5 minute mark or 0600 eastern time. The wider spread after the 5 minute mark (or at 
>0600 eastern time) is the graphical display of IBOC encroaching from 1500 on 1490.  
>Since the hash (5 minutes to 10 minutes) from WTOP is much stronger than the 
>signals on the left side (0 minutes to 5 minutes), it covers 1490 almost completely.
>
>I hope you can follow that.
>
>Bill harms
> 
>
>On 4 Jun 2005 at 22:41, Alan Bosch wrote:
>
>  
>
>>Bill:
>>
>>I guess is still don't get the orientation of the waveform.
>>
>>Is it centered on 1500 and 6kc wide?
>>
>>Then why the big bulge only toward the high side?
>>
>>I thought alI IBOC was symmetrical.
>>
>>AlanB
>>
>>Bill Harms wrote:
>>
>>    
>>
>>>Alan:
>>>
>>>The receiver was an R8B and the bandwidth was 6 khz. 
>>>
>>>I have heard WTOP blow away WTRI in Montgomery county within WTRI's primary 
>>>coverage area.  WTRI should have a complaint here, but I understand that there is 
>>>no protection for second adjacent stations. 
>>>
>>>Bill Harms
>>>Elkridge, Maryland
>>>
>>>On 30 May 2005 at 0:13, Alan Bosch wrote:
>>>
>>> 
>>>
>>>      
>>>
>>>>Bill:
>>>>
>>>>Thanxmuch.  Nice to know I am not hallucinating about WTOP -- the first
>>>>IBOC hash I had ever heard.
>>>>
>>>>Think I'll send this along to WTPI -- who (like WTOP) did not react to my
>>>>first missive on the problem.
>>>>
>>>>What is the L-R spread in kHz?  Is it possible to get one, if this does
>>>>not, going upward to 1520?
>>>>   
>>>>
>>>>        
>>>>
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>>>
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>
>
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