[opendtv] Re: Copps proposes more FCC action
- From: "John Willkie" <johnwillkie@xxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 15 Sep 2008 10:42:02 -0700
Signal strength is the problem at Cliff's home. He has a rather serious
tower to hold his antenna, but it needs to be at least 120 feet higher to
clear the hill that is between him and Philly transmitters. Clearing the
hill doesn't necessarily mean he will clear the first subtractive Fresnel
zone (which is actually worse than the effect of the hill.)
But, I'm not guessing; I've seen the profile graph. It's kind of rough to
tell someone that to receive signals well, he'll need to extend his tower
120-140 feet, and then play with the receive antenna position.
Think of the steel, think of the cable (and loss), think of climbing up and
down that tower, which would be close to 10 sections, or 200 feet.
Cliff's situation is more difficult than Mark Schubin's. Both are outlyers.
John Willkie
-----Mensaje original-----
De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
nombre de Manfredi, Albert E
Enviado el: Monday, September 15, 2008 9:27 AM
Para: opendtv@xxxxxxxxxxxxx
Asunto: [opendtv] Re: Copps proposes more FCC action
Cliff Benham wrote:
> Tonight I counted the number of breakups and freezes that occurred
> during the 30 minute ABC network news program received OTA from
> WPVI-DT, Phildelphia:
>
> I stopped counting at 23. Several times the pertinant information
> being presented was lost due to the momentary failures of the ATSC
> transmission/reception system.
I'm sure we've been over this already, Cliff. What leads you to believe
that the problem you have has anything to do with modulation? Do you
have signal strength and echo measurements at your location, to
determine what the problem is?
I'll bet that echo is not a major issue where you are. My guess is
signal strength is your problem, and that everything is therefore a
matter of digital cliff. So what you're probably objecting to is digital
TV of any stripe. Yes?
Bert
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