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UPC cable modem causes interference on TV!

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  • 13-10-2008 1:58pm
    #1
    stiofanD
    Registered Users Posts: 325 ✭✭


    Just curious if anyone else has noticed this on their setup.

    I have ntl/UPC for TV, broadband and phone. Both the TV and the cable modem are in different corners of the same room, with the cable modem fed from a splitter on the cable going to the tv

    Yesterday, I moved the TV over to the same corner of the room where the cable modem is. When I turned on the TV, the reception was utter crap. At first, I thought it might be the wireless router interfering, or a dodgy splitter, but imagine my surprise when I unplugged the cable modem and the TV reception was suddenly perfect!

    Why O why would UPC supply a modem that interferes so badly with their own analogue TV signal?

    BTW, I have the newer Scientific Atlanta cable modem which includes the phone ports.
    Tagged:


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    #2
    seamus
    Registered Users Posts: 68,317 ✭✭✭✭seamus


    I've always had the modem and TV in the same corner of the room on both analogue and digital. The modem and wireless router are beside eachother, on the TV's stand. I've never has problems with interference.

    Is it possible that the cable going from the splitter to the modem is damaged? Or perhaps the connector on either is damaged?


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    #3
    stiofanD
    Registered Users Posts: 325 ✭✭stiofanD


    seamus wrote: »
    I've always had the modem and TV in the same corner of the room on both analogue and digital. The modem and wireless router are beside eachother, on the TV's stand. I've never has problems with interference.

    Is it possible that the cable going from the splitter to the modem is damaged? Or perhaps the connector on either is damaged?

    the cable and splitter certainly didn't look damaged. Interesting that you don't see any interference. Do you have the newer modem that supports the phone service, or the older one?


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    #4
    seamus
    Registered Users Posts: 68,317 ✭✭✭✭seamus


    I've the newer one now, but I had both versions of the older one and never had a problem with them either.


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    #5
    rubadub
    Registered Users Posts: 32,373 ✭✭✭✭rubadub


    stiofanD wrote: »
    Why O why would UPC supply a modem that interferes so badly with their own analogue TV signal?
    €
    Cheap n' nasty, it's guaranteed crap in the small print!


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    #6
    paulm17781
    Closed Accounts Posts: 4,858 ✭✭✭paulm17781


    stiofanD wrote: »
    the cable and splitter certainly didn't look damaged. Interesting that you don't see any interference. Do you have the newer modem that supports the phone service, or the older one?

    Ignore Rubadub's solution. I dislike UPC but he seems to have a vendetta. I have the same modem and no problems. As Seamus said, it's probably a dodgy cable or splitter.


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    #7
    rubadub
    Registered Users Posts: 32,373 ✭✭✭✭rubadub


    paulm17781 wrote: »
    Ignore Rubadub's solution.
    It was only a joke, but it is just simply common fact that almost all companies who offer "free" devices will give you a substandard one, makes perfect sense for them to do so. And if you know no better you just live with it.

    I am a UPC customer myself, they did a great job installing my cabling, seems decent quality, but the box itself is dire.


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    #8
    stiofanD
    Registered Users Posts: 325 ✭✭stiofanD


    Hmmm... I'll try replacing some of the cables and see does that help at all. When you buy co-ax, how do you know you're getting good-quality, properly shielded stuff? Is there a particular model number or something like that to look out for? Any recommendations where I can go to get go coax cable?


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    #9
    rubadub
    Registered Users Posts: 32,373 ✭✭✭✭rubadub


    stiofanD wrote: »
    how do you know you're getting good-quality, properly shielded stuff?
    Usually the price;)
    stiofanD wrote: »
    Is there a particular model number or something like that to look out for?
    CT100 or RG6 should be OK, I think CT100 is the better of those.

    I had interference on my mates TV, just was overlapping cables at the back. Make sure they are not all tied up in knots or twisted around each other, better to be short as possible.


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    #10
    stiofanD
    Registered Users Posts: 325 ✭✭stiofanD


    Found the culprit!

    I had two splitters, one split off to the cable modem and another to split the signal between the TV and a PVR. When I replaced the cable between the two splitters, the interference went away :)


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    #11
    upthecake
    Closed Accounts Posts: 31 ✭upthecake


    Try moving the basestation from the phone away from the TV as this fixed my issue, seems to be poor isolation on the MMDS TV box





    stiofanD wrote: »
    Just curious if anyone else has noticed this on their setup.

    I have ntl/UPC for TV, broadband and phone. Both the TV and the cable modem are in different corners of the same room, with the cable modem fed from a splitter on the cable going to the tv

    Yesterday, I moved the TV over to the same corner of the room where the cable modem is. When I turned on the TV, the reception was utter crap. At first, I thought it might be the wireless router interfering, or a dodgy splitter, but imagine my surprise when I unplugged the cable modem and the TV reception was suddenly perfect!

    Why O why would UPC supply a modem that interferes so badly with their own analogue TV signal?

    BTW, I have the newer Scientific Atlanta cable modem which includes the phone ports.


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  • Options
    #12
    niallk
    Registered Users Posts: 749 ✭✭✭niallk


    Just got ntl/upc 20mb and have the same problem.
    Originally there were two "Cablelink" ports in the sitting room in different corners. NTL replaced one of them with a upc splitter. When modem is switched on the tv is interfered with. My auld lad just switches it off when he comes in so he can watch tele. How can I solve this? Didn't get any useable answers from this thread so far

    What is the story with the new splitter? It seems to take a completely different cable from the old "hole in the wall" things. Do I need a new cable? Is there a different type of TV cable availbale now?
    Please help...


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    #13
    stiofanD
    Registered Users Posts: 325 ✭✭stiofanD


    niallk wrote: »
    Just got ntl/upc 20mb and have the same problem.
    Originally there were two "Cablelink" ports in the sitting room in different corners. NTL replaced one of them with a upc splitter. When modem is switched on the tv is interfered with. My auld lad just switches it off when he comes in so he can watch tele. How can I solve this? Didn't get any useable answers from this thread so far

    What is the story with the new splitter? It seems to take a completely different cable from the old "hole in the wall" things. Do I need a new cable? Is there a different type of TV cable availbale now?
    Please help...

    In my case, the problem was that the cable going from the splitter to the TV (or actually the ntl digital box) was crap - it didn't have the necessary shielding to stop interference from the modem. Once I replaced it with a better quality cable, the interference was gone.


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