[opendtv] Re: Democrats Air Concerns About Analog Switchover

If I get NTSC reception, but it's of poor quality, how do I categorize "perfect" ATSC reception? Is it "exactly reproducing", "replicating", or something else?
How about if my ATSC reception drops out during touchdowns and resumes in time for commercials? How do I compare that to constantly snowy or ghosty NTSC? Is there a scale of irritation I can use? ;) 


On 18-Nov-06, at 2:52 AM, John Willkie wrote:
Notice that “exactly reproduce” is a much narrower term than “replicate.” You might want to look up replicate in a real dictionary.
Also, nobody on this list has any legal authority, and Mark Aitken and I are the only who comment on this list and participate in ATSC committees – and I am only involved in the T3/S1 specialist group on metadata. 



What people say on this list has no weight.
And, in the case of a few people, what is said is 180 or so degrees from anything real.
That said, 8-VSB will replicate NTSC, if broadcasters use the maximum power permitted by them. But, it won’t “exactly reproduce” NTSC in the near field for some time to come. In the far field, it will exceed NTSC in coverage. 

Hth



John Willkie
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv- bounce@xxxxxxxxxxxxx] On Behalf Of flyback1 
Sent: Friday, November 17, 2006 11:34 PM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: Democrats Air Concerns About Analog Switchover





John Willkie wrote:


Many different situations, or three?
For every ATSC receiver the signal, antenna and reception conditions will be different. No two will be the same.
Nobody has ever said that 8-VSB will exactly reproduce NTSC. So what indeed.
I am sure I have seen it written on this list more than a few times that ATSC would replicate NTSC coverage. 




John Willkie
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv- bounce@xxxxxxxxxxxxx] On Behalf Of flyback1 
Sent: Friday, November 17, 2006 7:37 PM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: Democrats Air Concerns About Analog Switchover




John Willkie wrote:
“Doubtful. See other comments about reception in his apartment made over the last few years by Mark Schubin.”
Your situation is nothing like Mark Schubin’s. Indeed, in a previous post, I accounted for his apartment. High signal levels, many building reflections. Buses going up and down the street, much urban RF.
I believe Mark Schubin has said several times he gets reasonable apartment NTSC reception with rabbit ears on top of his set. 



Your situation is different.

SO WHAT?
We have a replacement for NTSC that does not seem to work in many different situations.
It’s possible that no digital TV service can reach Mark’s apartment. The COFDM proponents have been too chicken to try when they’ve had the chance. Not so for ATSC proponents.
In my situation, using a MyHD-130 receiver, I cannot get signals very well when I’m close to the transmit sites. This involves two receive locations, one in urban Tijuana, the other in suburban San Diego (with a clear line of sight to the tx sites I cannot get.) That is sub-optimal; but I’ve yet to try a fifth gen unit. 



John Willkie

Sigh.
I have a DirecTV HD receiver, model H-20. It is the latest, greatest they make. It works better than any of the eight others I have tried. I think the ATSC portion of this receiver is fifth generation. Not certain where I read this, may have been here or Audiokarma? Still can't get clear, steady pictures without occasional breakups. Just not acceptable to me.

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