Re: not receiving digital over-the-air

"Alan F" <afiggatt1@[EMAIL PROTECTED]
> wrote in message 
news:L83Tj.641$Ve.94@[EMAIL PROTECTED]
| 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.
|
|  You have that backwards. VHF propagates better over the horizon that
UHF.

That is my understanding as well. Perhaps he was referring to true line of

sight.  The horizon comes into play after about 20 miles
As I recall most DXing Ham radio guys stick to around  10-20 meters-- or
at 
least the lower bands. CB is 11 meters and I used to get SSB transmissions

from Italy (10 watts RMS).  Of course in that case--"skip" was the key 
factor--again not line of sight

I also don't understand the viable transmission limits mentioned.
I used to live in Westport, CT and we got everything NY and Hartford could

throw at us with great quality.
Westport is about 50 miles from NY as the crow flies  and we only had a 
dinky yagi in our attic--no preamp.

-- 
Regards,
Richard Harison




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