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Tdub
Guest
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 Posted:
Wed Nov 09, 2005 5:41 am Post subject:
hdtv ota reception question . . . |
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I am a block from the transmitters (Sears Tower, Chicago). From my
window they are high up and just barely hidden from sight by the brick
wall of an adjacent building (if I were to move a few feet, I would
have line of sight). My windows are the industrial-type with thin wire
in them spaced an inch apart. What would you expect the quality of my
HDTV reception to be, using an indoor antenna, getting as close as
possible to line of sight, and what measures, if any, would you suggest
may improve it (e.g., attenuator, fm trap, particular antenna, etc.)?
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Dennis Mayer
Guest
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| Posted:
Wed Nov 09, 2005 5:41 am Post subject:
Re: hdtv ota reception question . . . |
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Tdub wrote:
| Quote: |
I am a block from the transmitters (Sears Tower, Chicago). From my
window they are high up and just barely hidden from sight by the brick
wall of an adjacent building (if I were to move a few feet, I would
have line of sight). My windows are the industrial-type with thin wire
in them spaced an inch apart. What would you expect the quality of my
HDTV reception to be, using an indoor antenna, getting as close as
possible to line of sight, and what measures, if any, would you suggest
may improve it (e.g., attenuator, fm trap, particular antenna, etc.)?
|
You are in a 'tuff' reception area... Too close to the Tower(s).
Only indoor experimentation will determine/define your digital
reception for that Sears stations...... Multipath galore??
Load up on a bunch of indoor antenna types........ & try 'em. |
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Art
Guest
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Wed Nov 09, 2005 6:05 pm Post subject:
Re: hdtv ota reception question . . . |
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You may actually want to try a directional antenna and point it away from
the main signal source. Pick up a reflected signal. If you pick up multipath
it will produce probable ghosts and other distortion in the HD picture.
Experiment with different types of antennas. As posted, it is a difficult
situation due to both the signal level being in relatively colse proxmetry
to the transmitter and the multipath interference from bouncing off the
other large structures in the area.Evenover on Labardee Street there is
reception problems using indoor for HD.
"Dennis Mayer" <Polaris1@execpc.com> wrote in message
news:437159BB.7539A29A@execpc.com...
| Quote: |
Tdub wrote:
I am a block from the transmitters (Sears Tower, Chicago). From my
window they are high up and just barely hidden from sight by the brick
wall of an adjacent building (if I were to move a few feet, I would
have line of sight). My windows are the industrial-type with thin wire
in them spaced an inch apart. What would you expect the quality of my
HDTV reception to be, using an indoor antenna, getting as close as
possible to line of sight, and what measures, if any, would you suggest
may improve it (e.g., attenuator, fm trap, particular antenna, etc.)?
You are in a 'tuff' reception area... Too close to the Tower(s).
Only indoor experimentation will determine/define your digital
reception for that Sears stations...... Multipath galore??
Load up on a bunch of indoor antenna types........ & try 'em. |
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Tdub
Guest
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| Posted:
Wed Nov 09, 2005 8:28 pm Post subject:
Re: hdtv ota reception question . . . |
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Thanks for the input, folks. I do get perfect VHF/UHF analog reception
(i.e., no ghosts) using a Silver Sensor, but I guess this is no
indication of the multipath problem I'm likely to get with DTV. |
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Grant Edwards
Guest
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| Posted:
Wed Nov 09, 2005 9:20 pm Post subject:
Re: hdtv ota reception question . . . |
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On 2005-11-09, Art <arthurgernberg@comcast.net> wrote:
| Quote: | You may actually want to try a directional antenna and point it away from
the main signal source. Pick up a reflected signal. If you pick up multipath
it will produce probable ghosts and other distortion in the HD picture.
|
Ghosts in a digital video stream? How on earth can that happen?
You'd have to decode the MPEG-4 stream, do some non-trivial
image-processsing on it, and re-encode it to get ghosts.
--
Grant Edwards grante Yow! It don't mean a
at THING if you ain't got
visi.com that SWING!! |
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Grant Edwards
Guest
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| Posted:
Wed Nov 09, 2005 10:23 pm Post subject:
Re: hdtv ota reception question . . . |
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On 2005-11-09, Grant Edwards <grante@visi.com> wrote:
| Quote: | On 2005-11-09, Art <arthurgernberg@comcast.net> wrote:
You may actually want to try a directional antenna and point it away from
the main signal source. Pick up a reflected signal. If you pick up multipath
it will produce probable ghosts and other distortion in the HD picture.
Ghosts in a digital video stream? How on earth can that happen?
You'd have to decode the MPEG-4 stream, do some non-trivial
image-processsing on it, and re-encode it to get ghosts.
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Um, I meant MPEG-2...
--
Grant Edwards grante Yow! I know things about
at TROY DONAHUE that can't
visi.com even be PRINTED!! |
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Del Mibbler
Guest
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| Posted:
Thu Nov 10, 2005 2:52 am Post subject:
Re: hdtv ota reception question . . . |
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"Tdub" <gripshift5@email.com> wrote:
| Quote: | Thanks for the input, folks. I do get perfect VHF/UHF analog reception
(i.e., no ghosts) using a Silver Sensor, but I guess this is no
indication of the multipath problem I'm likely to get with DTV.
|
Actually it's a pretty good indication. If yor analog signals are
coming from the same place as your digitals and are on roughly similar
frequencies and you have no trouble getting them without severe ghosts
(multipath), then it is very likely that you will have no trouble with
digital using the same antenna.
But there's no substitute for trying it. Either borrow a tuner from a
friend or buy one from a store with a good return policy. The lowest
price I've seen was $89 at Radio Shack, but that may no longer be
available.
Del Mibbler |
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cledus
Guest
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| Posted:
Thu Nov 10, 2005 4:25 am Post subject:
Re: hdtv ota reception question . . . |
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Tdub wrote:
| Quote: | I am a block from the transmitters (Sears Tower, Chicago). From my
window they are high up and just barely hidden from sight by the brick
wall of an adjacent building (if I were to move a few feet, I would
have line of sight). My windows are the industrial-type with thin wire
in them spaced an inch apart. What would you expect the quality of my
HDTV reception to be, using an indoor antenna, getting as close as
possible to line of sight, and what measures, if any, would you suggest
may improve it (e.g., attenuator, fm trap, particular antenna, etc.)?
|
I bet you can hang about a foot of insulated wire out of the center
portion of the connector on your HDTV tuner and get great reception. It
will cost less than a nickel to try it out :-)
Give it a try and let us know your results. |
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Tdub
Guest
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| Posted:
Thu Nov 10, 2005 4:41 am Post subject:
Re: hdtv ota reception question . . . |
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OK, I'll get a receive and give it a try. Thanks for the responses,
guys. I tried a Samsung 150 a couple years ago and got no signal, but
the unit may have been bad. Radio Shack's is no longer available. Looks
like the "VOOM OTA HDTV Receiver (activated) Motorola DSR550", being
sold on Ebay now for around $70, may be the best option. Anyone tried
this unit? |
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