[opendtv] Re: Sony Vaio home theater PC
- From: Bob Miller <robmxa@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 10 Mar 2009 22:12:06 -0400
Sounds like New York City. Most people here will not get decent DTV
with 8-VSB unlike with DVB-T, DVB-T2 or any of the COFDM based
modulations. Still can watch my video, an hour of very good reception
mobile in the canyons of Manhattan and N, Jersey with only omni
antennas and a 100 Watt transmitter, 1kW erp, from 425 ft on the AT&T
building at Canal St. And that is with 2003 tech. What if we were to
allow DVB-T2 today?
Seems most people talking of decent DTV reception from New York City
live in PA or farther out in NJ or Long Island.
And a lot of people who now claim decent reception will find over time
that decent is not good enough when they get even the occasional drop
out. I guess they will have to buy a new receiver for M/H and watch
the mobile version in some kind of SD.
Nice that this is so compatible. Why was it again that allowing both
COFDM and 8-VSB was so bad? And just how different would doing that be
from 8-VSB and M/H? Have to buy a new receiver??? Sounds like the rant
against allowing COFDM. I still see M/H as a new modulation since it
is not receivable by legacy receivers or decodable anyway and steals
bandwidth from the main channel that promised pristine HDTV. I see M/H
as not compatible with the spirit of the DTV transition as promulgated
back in the day.
Of course we all know that that promulgation was all about killing
COFDM and nothing about any spirit of anything.
All that energy just to kill off the good modulation. The last ten
years have been so incredibly negative that everything looks up from
here. I would love to get a bunch of broadcasters in a room and have
them extol at length on just how good 8-VSB has been for their
industry and how having 75% of homes with OTA receivers in them, like
the UK today, would be bad for US broadcasters today.
Add maybe 75% of cars also by now if we had opted for 8K DVB-T back in the day.
Bob Miller
On Tue, Mar 10, 2009 at 9:41 PM, Kilroy Hughes
<Kilroy.Hughes@xxxxxxxxxxxxx> wrote:
> I have line of sight to those 3 towers you mention (on Queen Anne Hill) 1 to
> 2 miles away across open water (Lake Union). The Space Needle is about 15
> degrees left of the towers and 2 miles away. I started with omni then
> reflector antennas because towers are spread in a 50 degree arc, but a silver
> sensor pointed away from the towers with gain set high gives the best results.
>
> I have to point another 15 degrees left of the Space Needle to get stable
> reception, so maybe I'm getting the bounce off the Space Needle while
> rejecting the first arrival of the 3 nearest towers. Or maybe one of the big
> bridges, or the tall buildings downtown are producing the echo of those three
> towers while allowing direct path from some more distant towers that I'm
> receiving. When I do a circular sweep, I can find dozens of strong echoes
> that give me a few stations at a time, but only one angle where there are no
> towers located that gives me the most. I get 7 stations (plus a few
> subchannels), including one station I can't get on analog but minus one I
> used to watch the most on analog. My remaining problem is that the echo
> pattern seems to shift with the weather and a couple stations drop out to the
> point they sometimes aren't watchable.
>
> Luckily, "The Daily Show" and "Arrested Development" are available 24x7 on my
> phone line to the Internet.
>
> Kilroy Hughes
>
> -----Original Message-----
> From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
> Behalf Of Manfredi, Albert E
> Sent: Tuesday, March 10, 2009 1:07 PM
> To: opendtv@xxxxxxxxxxxxx
> Subject: [opendtv] Re: Sony Vaio home theater PC
>
> Kilroy Hughes wrote:
>
>> My biggest problem was getting a reliable ATSC signal because
>> I'm near city center on a flat lake with line of sight to the
>> transmitters (:-) go figure. I went through several tuners and
>> antennas until I found a combination that could handle the
>> multipath for most of the stations with a single antenna position
>> and gain ("5th gen" tuner cards beat out the built in DTV tuners
>> I tried). I still record dropouts and blocking every couple
>> minutes when the rain gets bad ... about 160 days a year in
>> Seattle. I never watch live broadcast, so I'm not around to beat
>> and swear at the antenna when it's happening and just have to
>> delete shows when they are too messed up.
>
> On a recent trip to Seattle, I finally went up the Space Needle. The
> guide and elevator operator said it is 520' tall. So my first reaction
> was, "Big deal. I bet I can see TV towers looming over it."
>
> And sure enough, after we got to the top, I scanned the horizon and
> found three TV towers on a ridge, I think to the North of the Space
> Needle, and considerably taller than it is. It seemed like DTV reception
> in Seattle SHOULD be a piece of cake. How strange. Maybe they should use
> Mount Rainier instead? I'd love to know exactly what makes reception
> difficult when it should be easy. Is it one of those super long and
> strong echoes, like they measured in the Bay Area?
>
> Bert
>
>
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