[opendtv] Re: News: Many Obstacles to Digital TV Reception, Study Says
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 11 Feb 2008 12:11:04 -0500
Craig Birkmaier wrote:
> Count yourself lucky. As I recall, however, I think you have said
> that you use a separate UHF antenna (possibly in the attic). Is this
> the case, or do you rely exclusively on rabbit ears?
I've seen no extensive study comparing what real-world households can
achieve with digital reception. I don't know how "lucky" my reception
is.
The upstairs setup we have uses a Radio Shack double bowtie exclusively.
And in some cases, it does a better job than the outdoor antenna I use
for the bigger downstairs setup. To the point that I'm now thinking of
experimenting with my own UHF indoor antennas downstairs too, for two
channels (PAX and MHz Networks) that don't come in reliably enough with
the outdoor antenna. These transmitters are located way off from the
main lobe of both of my outdoor antennas. I'm planning to keep the
Accurian connected, when my new integrated TV arrives, just for the
purpose of more easily experimenting with other antennas.
> Sorry Bert, but power levels and C/N margins are more critical for
> DTV because of the cliff effect.
True enough. And the FCC is really demanding a lot from 8T-VSB, as we
have seen. The FCC planning factors are between 3 dB (VHF) and 5 dB
(UHF) more demanding than the French CSA planning factors. But in my
experience, especially with the new receiver built into the Philips PVR,
under normal circumstances, DTV gives good reception in cases where NTSC
was viewable, but not acceptable for long term viewing.
> The one area where there is some hope, or room for possible
> improvement is the use of smart antennas.
Perhaps. I think the better the receivers are, the less important this
will be.
Bert
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