Re: not receiving digital over-the-air

NadCixelsyd wrote:
>>I live more than 220 miles by air from Chicago. I have received Channel
>>7 HD channel a couple of times. My HDTV says it is WLS-HD. Is there two
>>channel 7's in Chicago.
>>
> 
> No, there are not two independant stations on one channel.  However,
> digital TV is bits.  With enough bits, a single station can broadcast
> 4 different programs on the same bandwidth.  The bits are interleaved
> and the TV knows which bits go with which program.
> 
> VHF (channels 2-13) is line-of-sight.  Even with a 1000 foot antenna,
> that's about a 60 mile limit.  UHF is about 1.3 times line-of-sight
> distance.
> 
> The HDTV may think it's the Chicago station, but I doubt it.  Does the
> station broadcast its own call letters?

I'm not receiving it today but the TV still has the channel memorized 
from the scan and its it is D 07-1 WLS-HD. I did a google search on 
WLS-HD channel 7 and it and it says it is an ABC Chicago station. I'm a 
long way from Chicago here in southern Illinois.