----- Original Message -----
From: "Jim B." <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, December 21, 2005 4:51 PM
Subject: Re: [Repeater-Builder] hdtv radio shack ant ????
>>
>> Actually, it requires considerably less signal than analog TV (color or
>> B&W). The coding gains of digital allow it to operate much closer to the
>> noise floor than analog. If you look at the power assignments of
>> television
>> broadcast stations, the DTV power to replicate coverage is in nearly all
>> cases much less, unless the analog station is on VHF and the paired DTV
>> station is on UHF. For instance, I am the CE for an eleven station
>> network...most of our megewatt UHF analog stations are coverage matched
>> very
>> well by their 50 KW digital counterparts. The rule of thumb is that
>> average
>> digital power is 12 dB less than peak analog power.
>>
>> Hap Griffin
>> WZ4O
>
> Not gonna argue-experience has shown the DTV's need a much better
> installation on the recieve end-across the board (VHF or UHF).
> And not just directionality either.
> -eos-
> --
> Jim Barbour
> WD8CHL
>
Agreed...a crappy installation with mis-terminations on the dividers, etc.
providing echos within the distribution system can wreck DTV reception. But
in a proper installation, much less power is usually required.
I can't believe it's been now almost 5 years to the month since putting my
network's first DTV station on the air (the first one in South Carolina and
the first to be transcoded onto digital cable...also the first to beta test
the TCI wideband slot antenna). My eleventh and last goes on air in
January.
Hap Griffin
WZ4O
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