Re: [IRCA] IMAGES & THINGS & IBOC

[Tom Dimeo <mwam@xxxxxxxxx>]

WWDB 860 Philadelphia is not audible under the Baltimore 
station here in Harrisburg Pennsylvania and the Baltimore 
station isn't all that strong either.  However, the IBOC 
noise from WWDB can easily be heard above and below 860.  I 
mentioned this on another list and someone mentioned that he 
had measured the strength of WWDB in their null and the IBOC 
was ten DB stronger than the analog signal.  Probably a lot 
of directional arrays have this problem.

A few years ago they spent a lot of time modifying the 
antenna system but it must be far from being perfect.  They 
also had to adapt the system to be used by WPEN at night.

Tom

** Pete Taylor Wrote: **
>Yesterday I was in Federal Way in the area of I-5 and S. 
>320th St.  around 1pm. I could not hear any audio from 
>KFBK-1530 but the HARs on 1520 were being wiped out by its 
>IBOC hiss. I do not recall anyone running in to this before 
>during the daytime when the mother station was not audible 
>but its excretion on a first adjacent was.


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