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TV3 Poor Reception when using BBC Amp

  • 11-04-2007 09:35PM
    #1
    Av8r_Mark
    Closed Accounts Posts: 18 ✭


    Hi,

    I am experiencing poor reception on TV3 when I have my BBC amplifier switched on. However when I power the BBC amplifier off, TV3 reception is perfect.

    I live near the transmitter on Mout Leinster in County Wexford \ Carlow border.

    Can anyone advise me as to what is the best way to fix this problem??

    Thanks in advance.

    Mark.


Comments

  • #2
    Foggy43
    Registered Users, Registered Users 2 Posts: 1,321 ✭✭✭Foggy43


    Can you let us know what happens to TG4 when your UHF amp is powered and when it is not?


  • #3
    Av8r_Mark
    Closed Accounts Posts: 18 ✭Av8r_Mark


    Hey Foggy,

    When amp is off, TG4 are perfect, yet switch it on and I get poor reception on both.

    Mark.


  • #4
    Foggy43
    Registered Users, Registered Users 2 Posts: 1,321 ✭✭✭Foggy43


    There are lads here who will be far more expert than me but I believe being close too Mount Leinster the amp is over doing it. I think this can cause problems. I will have to look up exactly what problems it can cause.

    I am pretty sure Divis and Brougher Mountain use the same channels for Digital TV but even with an amp I can't see you getting these channels.


  • #5
    Foggy43
    Registered Users, Registered Users 2 Posts: 1,321 ✭✭✭Foggy43


    On a previous thread one of the lads gave this link....

    http://www.abc.net.au/reception/tv/tv_interference.htm

    Is this any help?

    If not we may need more info on your amp.


  • #6
    Ulsterman 1690
    Closed Accounts Posts: 1,242 ✭✭✭Ulsterman 1690


    If the UK Channels are in a different group to TV3/TG4 you could use filtered diplexers ("group combiners") with DC passthrough with the cable from the amp on one input and the cable from your TV3/4 aerial on the other

    might also be worth sticking a group bandpass filter on the input of the amp


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  • #7
    Foggy43
    Registered Users, Registered Users 2 Posts: 1,321 ✭✭✭Foggy43


    I am just wondering!
    I have forgotten exactly what over amplification can do to your TV picture. Is it a case of amplifing can just make a reception problem worse?


  • #8
    bazzer
    Closed Accounts Posts: 362 ✭✭bazzer


    Foggy43 wrote:
    I am just wondering!
    I have forgotten exactly what over amplification can do to your TV picture. Is it a case of amplifing can just make a reception problem worse?

    In short, you can't make a good signal from a bad one just by using an amp. An incoming signal must be above and below certain thresholds, as defined by the manufacturer of the equipment being used.

    Amplifying a bad signal will just amplify the noise, too. Amplifying an overly-strong signal will cause cross-modulation, where the harmonics of the channels will beat against each other, mucking everything up on the entire band.


  • #9
    Foggy43
    Registered Users, Registered Users 2 Posts: 1,321 ✭✭✭Foggy43


    Bazzer!
    Thank you for the info! Much appreciated.


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