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Techie' help needed!

Discussion in 'Satellite TV, Sky TV & FreeSat' started by rasb0, Mar 1, 2005.

  1. rasb0

    rasb0
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    What is a Forward Path Equaliser and what does it do?? :confused:

    It's 4dB and came off the ntl coax at the back of the receiver when we decommissioned it in favour of Sky+ :D
     
  2. Chris Muriel

    Chris Muriel
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    The forward path is the signal down to your NTL box ; since cable TV is 2-way there is also a return path back to NTL.
    The return path is also used by cable modems (or the one built into the NTL boxes).
    These can also be called upstream and downstream - but the latter terms are more usually used to refer to ADSL.
    The cable forward path uses QAM modulation at frequencies from about 70-850 MHz.
    The return path or return channel uses qpsk modulation in the band 21-65 MHz.
    What you have is basically a 4 dB attenuator ; hang on to it (if you are donating it, let me know and I'll PM you).

    Chris Muriel, Manchester
     
  3. rasb0

    rasb0
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    Cheers for the info. I'm halfway there.

    :confused: But..... what does it actually do, just so I know for the future and can sound like I know what I'm talking about......for a change :rolleyes:
     
  4. Wackojacko32

    Wackojacko32
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    Hi rasb0

    Me again :) I had one of these fitted originally but it later disappear when I had a box swap. AFAIK it actually reduces the strength of the incoming signal and is used where the cable run is relatively short as the boxes dont like the signals too strong either.

    Wackojacko32
     
  5. Chris Muriel

    Chris Muriel
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    Exactly. That is why I described it as an attenuator. A 4dB attenuator will attenuate (reduce) the signal by 4 dB.

    Chris Muriel, Manchester.
     
  6. rasb0

    rasb0
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    Thanks guys :thumbsup:

    That's me off to the pub tonight to sound intelligent :lesson:
     
  7. Wackojacko32

    Wackojacko32
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    I knew that, you knew that, but rasb0 didn't. Thats why I explained what an attenuator did :D
     

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