Horizontal low band channels not being received???

Discussion in 'Satellite TV, Sky TV & FreeSat' started by thenobody, Jan 14, 2008.

  1. thenobody

    thenobody
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    Hi,

    Firstly the setup.
    I live in an apartment which has a communal system for sky.
    Sat dish is on the roof and uses a quattro lnb, cabled down to the plant room in the basement. The vertical high, vertical low, horizontal high, horizontal low and terrestrial cables come down into a Spaun brand Launch amplifier.
    this then goes out to a Spaun brand multiswitch that feeds off to multiple apartments - two feeds to each.

    Last week there was bad weather and a number of channels were reporting no satellitte signals were being received.
    Most of these returned a day later when the weather calmed down.
    Now all channels are fine except the ones that seem to be on the horizontal low band frequencies eg. Paramount+1, virgin, virgin+1, Dmax and channel 6 (ireland). Virgin channels come through but gets broken up quite often. Paramount+1 could not get a signal at all.
    Rte, TV3, TG4 and BBC channels are showing but sometimes break up.

    I had a guy who came to install HD for me last friday go up and look at the dish and he said it seemed fine but i didnt really have confidence he knew anything about it.

    I am not sure if the amp is the problem. Could the amp be failing on a certain frequency band?
    Yesterday I installed a small line amplifier onto the output from the amp to the multiswitch. It seems to have improved things a lot and now all the channels in question are coming in first time when i go onto them but are still breaking up a little.

    Can anyone please help me out as to what might be the true cause of this problem on the horiz low band channels?
    LNB? Amplifier? Multiswitch?

    Im trying to avoid having to pay a lot of money to bring someone out to check it out as I know the other residents wouldnt bother or offer to help me pay for it.

    If I add another line amplifier after the one i put in, would that improve it even further?
    Or would it be best to add another one on the connection of the cables coming into my apartment instead?

    Your help will be very much appreciated

    Steven
     
  2. davemurgatroyd2

    davemurgatroyd2
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    Have you tried asking the other residents whether they are having similar problems or not? This will help pin the fault down from lnb, cable from lnb, multiswitch, amplifier or even cabling to your flat all of which are possible. There is a strong possibilty water may have got into one of the cables from the lnb and as this is drying out signals are returning..
     
  3. thenobody

    thenobody
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    Its not just me. Its common to all of us.

    the line amp has made a big improvement. Got through Sopranos on channel 6 last night with just three instances of minor pixelation.

    Before couldnt even get the channel to show up.

    Hopefully it is as you say and the it is a case of the cables drying out.
     
  4. davemurgatroyd2

    davemurgatroyd2
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    If it is the cable it needs replacing as soon as possible as water ingress could cause serious damage to whatever it is connected to. You really do need a professional installer to check out the system as without the correct professional test meters or a good deal of experience in satellite installation, diagnosis will be very difficult although it would appear the fault lies in one of four things

    1 Cable from dish
    2 LNB
    3 Launch amplifier
    4 Multiswitch
     

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