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Type: Posts; User: gadient

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    Re: voltage in cable coaxial

    Yes it is! lol It isn't my idea but rather the numbskulls that are trying to solve the problem. I still have 2 installed in the attic at the splitters. I did get one of the guys to say the splitters...
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    Re: voltage in cable coaxial

    Yes, that's what they said. I meant to grap the thing this morning and didn't. I have a nice APC UPS with a digital readout now here at work. It also has a cable line filter. I could bottow that for...
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    Re: voltage in cable coaxial

    Sorry "d-plexor" is a typo. They call it a di-plexor (er?) and it is a satellite device that supposedly blocks voltage buildup. I'll get info from the disconnected one when I get home to try to...
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    Re: voltage in cable coaxial

    Like I predicted my internet and comcast phone went out again. I called and reported it. They still blame my house wiring. I talked to everyone I could get to call me and none of them really...
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    Re: voltage in cable coaxial

    I reinstalled the modem after bringing it to work to check for voltage. It has been working fine - no outages that I have noticed. I hate calling them so I haven't even told them I found the mystery...
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    Re: voltage in cable coaxial

    OK, it is 47 V AC (bleed through) from the signal wire - or the shield - to the receptacle ground at work. There is no voltage between the shield and the signal wire. I couldn't get an amp reading...
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    Re: voltage in cable coaxial

    Right - there is a splitter block that is tied to the telephone pole ground and it is up on the line. I can disconnect the feed up in the attic. That will isolate a major possibility for the ground...
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    Re: voltage in cable coaxial

    Could a problem in their lines (an intermittent short maybe) damage the modem and cause it to backfeed voltage? They have never checked the grounds and they have not re-done the ground which is...
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    Re: voltage in cable coaxial

    All great ideas. Thanks for helping me with this. You guys are great. I keep telling them the problem is in the line and that it must be some kind of ground loop but they just blow me off. They say...
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    Re: voltage in cable coaxial

    Measuring voltage in the attic where the splitters are without the modem connceted there is not much - maybe 5 volts - I forget. The techs were shocked that I proved the voltage came from the modem...
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    Re: voltage in cable coaxial

    That is the cable techs idea that the splitters act as caps. It has happened with 2 modems so they think it's impossible to be their problem. The voltage comes straight out of the modem - unconnected...
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    Re: voltage in cable coaxial

    Good questions: I have been a tech since 76 - research, computer-integrated manufacturing tech, electronics engineer, and now IT manager. The comcast guys had the meter but I assume it was dc and...
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    Re: voltage in cable coaxial

    I have this problem and I am a technician. The cable guys are at a loss except to blame it on my house. We have traced the source of the backfeed to the cable modem itself. That means the problem has...
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