| reply to nh5
Re: Video On Demand pixeling I've talked to tech support three times on this HBO-demand-white pixel issue. they dont have any answers. When I rewind, there is no pixel again, which makes me think it is a bandwidth issue.
Any thought to it being some sort of copy protection? |
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nh5
join:2006-01-21
Old Bethpage, NY | That is what the tech told me certain tvs when hooked up with hdmi or component he told me have issues with hbo on demand. It has to be a copy protection issue. |
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 TelcoguruPremium
join:2005-08-22
Fresh Meadows, NY | reply to KA3SGM
The signal travels on the center stinger. The VOD, IPG and widgets travel on the braid. Thanks. |
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 KA3SGM- -... ...- -Premium
join:2006-01-17
West Chester, PA
 ·Verizon FiOS
 ·Cricket Broadband
| said by Telcoguru:The signal travels on the center stinger. The VOD, IPG and widgets travel on the braid. Thanks. Telco, where are you getting this information. There is a thing called "skin effect" where the higher the frequency of the signal, the closer to the edge of the conductor it travels. The RF travels on the center conductor, or stinger as you call it. The frequency is the only diference, 54-862MHz for video, and 1000MHz(1GHz)+ for the MoCA, all on the center conductor. Because they are all on different frequencies, they do not interfere with each other.
The braid(s) and foil(s) serve as a shield for the signal on the center conductor. Hence dual shield, tri-shield, quad shield. If it was meant to be in the RF path, then why do they call it a shield?
The center conductor can carry information, from DC - to whatever frequency of RF you connect to it. 5GHz is probably a practical upper limit for conventional RG6, due to the loss incurred, even over short cable runs, and the fact that once the wavelength of the signal reaches the distance between the braid and center conductor, the coax impedance becomes mis-matched, and the signal loss goes through the roof. This is where you typically move from coax to a hollow waveguide. I have been involved in ham radio for more than 20 years(FCC license since 87'), and have worked with everything from single strand wires, to twinlead, to coax, to waveguides.
Often with quite a bit of power(>1200watts) being transmitted through it too. I have seen FM broadcast transmitters using 3 1/2 inch corrugated coax with nearly 20,000 watts applied to it, and touching the shield does not cause a problem, but touching the center conductor of the coax, where the signal is traveling, would likely cost you your hand, or arm, if not your life !
The TV coax connector on the ONT is connected to the same internal bus as the ground wire at the ONT, so if the braid/foil of the coax is grounded, and you connect a signal source to the braid, where does the signal go? It goes to ground ! The braid may have stray RF currents and static electricity on it, but that is why it gets connected to ground, to eliminate that from happening.
Like I said before, signal on the braid is like water flowing on the outside of the pipe, like the light on fiber traveling on the outside of the cable jacket. Go wiki coaxial cable, and re-read the principles of how it works.
I have more than 5000' of various size coax on spools, and I use it for custom cables that I build myself. I pre-wired my home for FiOS TV, compression connectors and all. The Verizon installers only needed to connect the set top boxes. They were even making comments about how I had better materials, and tools, than they did.
ALL of the FiOS TV RF signals travel on the center conductor, trust me, I have many years of experience on what I am talking about !
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TelcoguruPremium
join:2005-08-22
Fresh Meadows, NY | Try using RG6 with no braid and plug it into a set top box and see what happens. You will be surprised. |
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 nopingno route to hostPremium
join:2007-01-09
2 edits | reply to nofios4u
Noticed the problem here as well, mostly isolated with HBO VOD titles.
When I called to complain ask about the problem, I was told that Verizon would send someone out to re-wire all the coax since "it sounds like a problem with the old coax that you have," didn't get the "we know it's an issue with HBO" response.  |
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| reply to nh5
Did they ever fix the white pixeling on HBO VOD for anyone? I had a tech out here today about it and he has no idea what it is. He's supposed to come back but i'm not sure that his co-worker will find anything here that he didn't. Any fix for this???? |
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nopingno route to hostPremium
join:2007-01-09
1 edit | reply to nofios4u
Unofficial word: it's a "known issue that affects HBO and Cinemax" and should "be fixed by August." |
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