Re: DTV antennas?
- From: Jeff Liebermann <jeffl@xxxxxxxxxx>
- Date: Sat, 12 Jul 2008 08:48:21 -0700
On Fri, 11 Jul 2008 17:18:33 -0700 (PDT), mpm <mpmillard@xxxxxxx>
wrote:
As for the broadcast end of things, the FCC's website does provide
antenna detail.
Manuf, model, height and pattern. If you're good, you can pretty
easily decode the horiz & vertical, # of bays, and gain of the
antennas just by deciphering the antenna model number...
Yep, but you can't decode it from the FCC data. The typical Narda
field strength meter:
<http://www.narda-sts.us/products_highfreq_srm.php>
yields the equivalent of a isotropic receive antenna by conglomerating
the various polarizations into a single reading. That's what's
plotted (and interpolated) on the FCC site.
For example, KFOX in El Paso, TX.
http://www.fcc.gov/fcc-bin/tvq?list=0&facid=33716
Send me your coordinates (or nearby street intersection) and the
channel number you are having trouble with. I'll be happy to take a
look at it for you. -mpm
One of the fun things to do is to use the antenna pattern from the FCC
web pile to generate a field strength plot of the area using free
software such as Radio-Mobile:
<http://www.cplus.org/rmw/english1.html>
and the SRTM topo maps. The FCC does it crudely for "coverage area"
such as this:
<http://www.fcc.gov/fcc-bin/FMTV-service-area?x=DT1092992.html>
It would be rather bad if you were located in a protected null in the
pattern. I can grind out a sample if you supply the station.
--
Jeff Liebermann jeffl@xxxxxxxxxx
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
.
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