[BC] IBOC Radios

[Robert Meuser]

I observed (and reported) the overload problem. In my case 1560 - which 
is not especially hot where I live. I am sure WOR has a much stronger 
signal. I also reported this to the BA development team. Using the loop, 
I can make most of this go away. It is interesting that it is only the 
higher channels. I wonder if instead of it being overload, it is really 
some kind of a hetrodyne caused by some constant frequency digital 
signal in the TI front end.

R


Robert Orban wrote:

> At 09:43 AM 8/26/2006, you wrote:
>
>> From: Robert Meuser <Robertm at broadcast.net>
>> Subject: Re: [BC] IBOC Radios
>> To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
>> Message-ID: <44F06FA4.2040900 at broadcast.net>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> NPR testing is to the contrary. They give the BA receptor good marks 
>> for RF in
>> their lab testing.  Could it be the indoor environment is hostile to 
>> IBOC in
>> general???  After all it is just another form of AM.
>>
>> R
>>
>>
>> Robert Orban wrote:
>>
>> >
>> > There are actually a number of HD radios with excellent front ends,
>> > mostly auto radios. The problem seems to be with the tablestop radios.
>> >
>> > We shall see if BA gets it right in V2.
>> >
>> > Bob Orban
>
>
> The V1 BA's main problem is that its AM front end overloads with 
> relatively low signal levels. I'm not sure if my BA's front end is 
> being saturated by KNBR or whatever 1550 is calling itself these days 
> (or a combination thereof). However, both of these TX's are located 
> about 4 miles from my house, so they are not exactly blanketing it. I 
> don't own a field strength meter, so I can't ascertain exactly what 
> field strength these stations are putting in my bedroom. However, no 
> other AM radio I own (and I own quite a few, thanks to AM processor 
> tuning projects over the years) gets its front end wiped out like the BA.
>
> I find that the BA's FM tuner works fine when connected to my rooftop 
> antenna. I can get every Bay Area FM HD radio transmission with no 
> problemns.
>
> Bob Orban
>
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