[mythtv-users] Hauppauge WinTV-quadHD TV Tuner Card 1609 and Pixelation
allen.p.edwards at gmail.com
Sun Feb 24 17:12:04 UTC 2019
On Sun, Feb 24, 2019 at 8:11 AM Barry Martin <barry3martin at gmail.com> wrote:
> Hi Allen!
> The performance of that antenna for WHBF is probably close to your wet
> noodle which is probably a good thing as it is so close and could otherwise
> overload any preamp. This antenna has about 10dB gain where you care and is
> similar to the Winegard I linked. If it meets those specs it is probably
> fine. That same company makes a DB4 which has about 14dB gain. The
> boresight bain is the gain on axis so where your antenna is pointing.
> Did you say the antennas are in the attic? There is a trend around here to
> have roofing plywood with aluminum on it. If you have that definitely move
> the antenna up on the roof. You would also benefit by adding height so if I
> followed this thread correctly I would get a pole and chimney mount or post
> mount and get the thing out of the attic.
> Thanks for the info – FWIW Winegard’s Burlington, IA, facility is about 80
> miles SSW of me – trivia for the Small World Dep’t.
> The DB2 antenna specs are listed as “range of 1-30 miles and high gain of
> up to 11.4 dBi”. Next line says “multi-directional (pulls in signals from
> many directions)” which from the thread discussions could be causing
> multipath problems when windy. OTOH could be signal disruption as the poor
> electronics go on a roller coaster ride to get here The ‘performance data’
> and ‘boresight gain’ were extracted from the DB2 antenna’s detailed spec
> And yes, the antennae are in the attic. I don’t think there is any
> aluminum in the sheathing nor other than the flashing. Have tested with the
> antenna outside on the deck and did not make any difference. Well, no
> difference as far as signal reception; there were ‘relationship
> differences’ ==> “how long is *that* going to be outside?!”. <whimper!>
> So appears to be no Faraday Cage issues.
I have looked more carefully at the specifications on your antenna and you
can just subtract 2.15dB from the published numbers. They are using dBi
and Winegard is using dB over a dipole and a dipole had 2.15dBi gain. The
antenna is multidirectional because it doesn't have a lot of gain. Reading
the flyer on your antenna, it reads like marketing hype and not an
engineering document. Perhaps that is normal and to be expected but the
fact is that they have probably not changed physics as they claim they
have. Me bad for not catching that earlier.
Your wife might like the photo I can't post in this group but sent to
you.. The antenna to the left of the chimney is a vertical HAM antenna.
The top TV antenna is a full bandwidth one left over from analog days when
you needed channel 2 but it works so why replace it? The middle one is
unused and was from the early HDTV days when NBC transmitted from the other
direction. I rotated it when they moved their antenna and have since
disconnected it. I should take it down but why? There was a small UHF one
between these but I don't need those stations any longer as the two PBS
stations now broadcast each others signals on one of the sub channels. I
gave it to a friend. The lower antenna is for FM radio. FM Radio was what
we used to use to listen to music :-) The antennas are on pipe, not
tubing. No seam. They are connected to a larger pipe that goes through the
roof and is anchored on the floor of the attic.
You are obviously not going to do this and I would not duplicate this setup
myself. I would get one of the higher end HD Winegards. Perhaps you can
get a recommendation directly from them. Given they are close to you, I am
sure they would know which antenna would be good if you can get in touch
with technical support and not marketing.
All this said the market for antennas has clearly changed. HDTV is a lot
easier to receive than the old analog signals. Multipath used to give
ghosts and most people had TVs with terrible pictures. That led to the
Cable industry. But with digital, you can get a perfect signal more
easily. Equalizers can remove problems from multipath and you have less of
a constraint on the antenna. In your case with the wind and the pixelation
your new tuner might solve it or you might need a better antenna.
I think there was a thread on pixelation that basically implied that tuners
can detect it and basically remove it probably by using pixels from
adjacent frames. Someone even said that some stations transmit pixelated
content and rely on the receivers to remove it.
I will be interested in how your new tuners works out so please let me know
how it goes. My old HDHomeruns are not without issues so I may be in the
market for something better.
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