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Anyway to work around Multipathing?
Posted 05 February 2005 - 01:32 AM
I believe that I am experiencing multipathing on the two VHF channels (7 and 10) which are the ABC affiliates out of Tulsa (10) and OKC (7). (yes I turn the VHF gain back on and extend the antennas when I try to tune them) Both stay at 49%, might briefly bounce past 60% and then fall back down. Beyond these channels I don't receive the Tulsa UPN, CBS, and NBC channels, and all of which show 49% signal strength with jumping above 60%, but never lock in. And there are a few other OKC channels that I don't care to have that I can't get. But mostly I'd like to receive the Tulsa ABC and UPN channels to an addition to what I already get, but I don't know what I need to do to get them.
I don't know if it is because the channels have weak broadcast signals, or because of multipathing for sure. But It sounds like what people talk about when they discuss mu litpathing.
Why is it I can receive OKC channels better than I can Tulsa channels, when I am almost twice as far from OKC? What is multipathing? Is it, for instance were one channel sits in between two other channels, i.e. channels 6, 7, & 8, channel seven would be the one open to multipathing?
Thanks for any info.
Hardware ID: LADD-N
Boot Strap Version: 1014
Two Dish 301s
RCA/Dish Network 40" Widescreen HDTV
RCA RT2600 DD5.1, DTS, DPL 1-2 Surround Sound System
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Posted 05 February 2005 - 07:56 AM
Posted 07 February 2005 - 01:44 PM
Channel 2 is the longest wavelength and in the group up to 6 -- low VHF. Channels 7 to 13 are about 1/3 the wavelength, high VHF, and you might do well with a partially extended rabbit ears, which would be easier to maneuver. The low VHF is much less directional but no rabbit ears are.
I found the Phillips model with 45 dB to have no gain. A bad example? The RCA model did no better than a Phillips dish rim antenna. I now have an ancient long combo outdoors antenna that I could hang from the bottom of my deck. It faces the 49 mile away towers, barely viewed with binoculars. They all have problems with the low VHF, 2 4 5 for some reason -- line of sight is close to a 2 mile distant water tower or between houses?
Moral: get an outdoor antenna, get a good view, have luck.
921 DVI #2/2 (#1 7/9/04 lightning nearby) 120B/F051/L211HECD-N
811 Component #1/1 (1/04)
501 RF/S-vid #2/4 machine (#1 few months, #2 flakey, #3 1 day, #2 came back, ran #2 + #4 until kept quieter, running for 2 years)
Versions: current software
Monitor: Hitachi 46H83
Dish: 500/500 Legacy SW64. Power inserter on 811.
Orbits: 119, 110, 148
Underdeck old 78" or more antenna. Still in 49 mi line of sight. It is diplexed at SW64 on 811 line. Signal strength 100 to 123 except KOB-NBC in 80s.
Posted 07 February 2005 - 10:40 PM
Dishnetwork PVR 510
2 X Dishnetwork 301's
TiVo Series 2 Stand Alone
Toshiba 32" SDTV
Sanyo PLC-SP20N (Contrary to Projector Central - it will do HDTV - very well thank you).
Posted 08 February 2005 - 02:26 PM
A vertical antenna would have little directionality so maybe you just were not pointed correctly and they luckily were circularly polarized.
Posted 18 May 2005 - 08:39 AM