Posted: 7/29/2017 8:34:28 PM EDT
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OK my cable boxes are all wired. Whenever an iPhone is used my Fox channels tend to pixelate on tv. It can be a phone call or internet usage. It does not have to be connected to my wifi for it to happen.
Anybody know why? It is pretty much Fox channels up and down the dial. And the cable boxes are wired. I just don't get it. Oh and the other clue is heat, happens mostly in the summer. My google chrome book on wifi does not interfere. Trying to watch UFC prelims and pretty near impossible. I am putting iphones on lock down for the night shortly. |
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Does this happen to one specific TV or all of them? One specific phone or more than one? Start eliminating variables to narrow it down. Try replacing the coax cable that goes from the wall to the cable box and see if that helps. The variables have been eliminated previous to typing this. It is as I described. I have RG6 I think...the good double shielded stuff. Double cable runs to each outlet. I have already switched the cables in the attic one at a time. It is also not unique to my house. It happens occasionally at work. Mostly same symptoms. Work tends to be more effected when wet. I have also taken the system here all the way to down to one cable, one box, one tv. Doesn't matter. When it starts happening it happens. |
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Not the issue. Have previously changed ALL of them, painstakingly. Quoted:
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Check for bad cable connections/connectors.  
Last idea: Have you tried blocking the signal with a sheet of copper? Aluminum foil will work but it's not as good.
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Have you tried hooking up another TV?
Last idea: Have you tried blocking the signal with a sheet of copper? Aluminum foil will work but it's not as good.Quoted:
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Check for bad cable connections/connectors.
Last idea: Have you tried blocking the signal with a sheet of copper? Aluminum foil will work but it's not as good.No I cannot say that we have blocked our iphones with a piece of foil if that is what you mean. I can tell you that I am in my bedroom was watching a pixelating TV while my wife and daughter are in the living room and their iphones were causing it til I asked them to shut them down. |
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Have you tried hooking up another TV?
Last idea: Have you tried blocking the signal with a sheet of copper? Aluminum foil will work but it's not as good.Quoted:
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Check for bad cable connections/connectors.
Last idea: Have you tried blocking the signal with a sheet of copper? Aluminum foil will work but it's not as good.No I cannot say that we have blocked our iphones with a piece of foil if that is what you mean. I can tell you that I am in my bedroom was watching a pixelating TV while my wife and daughter are in the living room and their iphones were causing it til I asked them to shut them down. |
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Over the years I have tried numerous TV's. It happens on every TV in the house. No I cannot say that we have blocked our iphones with a piece of foil if that is what you mean. I can tell you that I am in my bedroom was watching a pixelating TV while my wife and daughter are in the living room and their iphones were causing it til I asked them to shut them down. Quoted:
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Check for bad cable connections/connectors.
Last idea: Have you tried blocking the signal with a sheet of copper? Aluminum foil will work but it's not as good.No I cannot say that we have blocked our iphones with a piece of foil if that is what you mean. I can tell you that I am in my bedroom was watching a pixelating TV while my wife and daughter are in the living room and their iphones were causing it til I asked them to shut them down.
If the problem can be prevented by blocking the signal then you can locate the problem with triangulation.
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Now I would assume that the problem is outside your house. I would say it has something to do with the phones. Trust me when I tell you over the years I have been trouble shooting this with EVERYTHING. Its the phones at least setting something in motion. |
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It sounds like you have an RF leak in the cable and you can use Radio location techniques to find it. It could be several poles down from your house. Call the cable company and tell them that there is an RF leak and people are getting to watch TV for free. They will send a Tech out real fast to find the problem.
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One more thought, what set top boxes do you have? They usually have a diagnostics menu in them, can be used to ID what freqs the Fox channels are on. Just turned phone back on less than 10 seconds tv pixelated. |
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It sounds like you have an RF leak in the cable and you can use Radio location techniques to find it. It could be several poles down from your house. Call the cable company and tell them that there is an RF leak and people are getting to watch TV for free. They will send a Tech out real fast to find the problem. This is not an all day everyday thing. But it usually comes on during the hottest part of the year. Once it starts it stays around a while. Until I can convince the cable company to come look. Then it gets better for a while. They try to say Fox sends out a known weak signal?? |
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Not sure what boxes you have then. Normally with Mot boxes, turning them off and immediately hitting OK or Menu a couple times will access diags. Tune the box to one of the impacted channels, go into diags, to In Band Status or Current Channel Status, RF carrier freq will be listed. Do the same for all impacted channels, all of them are likely one one or two EIAs.
But, you definetly have an RF ingress point somewhere nearby (likely in home). If it was me, I'd clip / strip / replace / compress new connectors on every coax connection starting from where their service enters the home, at every splitter, behind every wall plate, from the plate to the boxes. But, if it is the boxes themselves letting the noise in, or something like a staple through a cable in the attic / wall - would be harder to fix. |
| You keep saying iPhones, but will other brands cause the same effect? Also, what band does your phone use when you are causing the problem? You can check on iPhones by going into test mode by dialing *3001#12345#* then tap"Serving Cell Info" to read the band in use. The different bands correspond to different frequency ranges which may help in narrowing the possible source of interference. |
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You keep saying iPhones, but will other brands cause the same effect? Also, what band does your phone use when you are causing the problem? You can check on iPhones by going into test mode by dialing *3001#12345#* then tap"Serving Cell Info" to read the band in use. Different providers, different bands, different phones, on top of what cable provider you have and which channels they serve on which EIAs = different channels impacted. When LTE started deploying, such problems arose since many of the LTE bands are sitting on the same freqs that cable operates in. Never an issue before with earlier cell networks, since those freqs (normally) did not overlap. |
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Just put the phones in the refrigerator for testing, a few minutes there won't hurt them. If Fox clears up then you know for certain it's the phones. Then bring out one at a time.
I've encountered real EMI, the kind that caused serious losses and spurred an American Power Conversion (APC) Power quality audit which found issues at every electrical switch and floor of the building. True EMI is a virtually a ghost, often with no single fix - as the symptoms are a sum of all the difficiencies combined. Poor grounding, improper electrical, phone/data wires passing by unshielded high energy devices like ceiling air handlers that are missing panel covers. An overall "sick" and dangerous environment. |