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Thread: Two receivers, 1 lnb help please

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    Senior Member rob916's Avatar
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    Default Two receivers, 1 lnb help please



    Yes I have searched.
    I have a sub box and a dm500.
    I only wish to watch one at a time.
    I have 1 lnb running to dreambox and looped through lnb out to the sub box.

    I can make each box work by itself by turning lnb power on/off etc but I cannot make them work without changing lnb settings all the time.
    Can this work? I cant make the bloody thing work.

    Which box should be supplying lnb power.
    Thanks



  2. #2
    Senior Member beer4life's Avatar
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    Cool DiSEqC Switches.

    Quote Originally Posted by rob916 View Post
    Yes I have searched.
    I have a sub box and a dm500.
    I only wish to watch one at a time.
    I have 1 lnb running to dreambox and looped through lnb out to the sub box.

    I can make each box work by itself by turning lnb power on/off etc but I cannot make them work without changing lnb settings all the time.
    Can this work? I cant make the bloody thing work.

    Which box should be supplying lnb power.
    Thanks
    G'Day rob916,
    The simplest and most versatile way to do this is to have a dual polarity LNB, with each polarity via a splitter to one 2 x 1 or (4 X 1 Switch on the master STB. (Either, but not both.) You don't have to use all the inputs). One of these is controlled by the STB tone burst (A,B,C, or D control in the antennae setup of the STBs..
    Using this you can have both working at the same time, either H or V.
    There are many variations that could be used, but I think that this would be the best for your application.

    Kindest Regards, " The Druid ".


    Not quite what I had in mind, but should give the general idea. Just substitute the H and V outputs of the dual LNB for the C and Ku band inputs.
    Last edited by beer4life; 27-05-08 at 09:39 PM. Reason: Housekeep.

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    Premium Member agarol's Avatar
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    Another simpler solution is to get a dual LNB (or even a quad - but that's perhaps unnecessary expense). And there's no loss through the splitter or switch either.
    ag
    Energy is the father of creation

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    Senior Member beer4life's Avatar
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    Thumbs down Do you need bifocals, or is this myopia.

    Quote Originally Posted by agarol View Post
    Another simpler solution is to get a dual LNB (or even a quad - but that's perhaps unnecessary expense). And there's no loss through the splitter or switch either.
    ag
    Please carefully read my post, to wit:

    The simplest and most versatile way to do this is to have a dual polarity LNB,
    AND in case you don't know, there are losses through the 'splitters' and 'switches', typically 3Db.

    Kindest Regards, " The Druid ".

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    Premium Member LeroyPatrol's Avatar
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    Seeing you don't need to use them at the same time why don't you use a switch like ?

    Leroy
    Last edited by LeroyPatrol; 28-05-08 at 10:08 AM.
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    Premium Member LeroyPatrol's Avatar
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    Quote Originally Posted by beer4life View Post
    G'Day rob916,
    The simplest and most versatile way to do this is to have a dual polarity LNB, with each polarity via a splitter to one 2 x 1 or (4 X 1 Switch on the master STB. (Either, but not both.) You don't have to use all the inputs). One of these is controlled by the STB tone burst (A,B,C, or D control in the antennae setup of the STBs..
    Using this you can have both working at the same time, either H or V.
    There are many variations that could be used, but I think that this would be the best for your application.

    Kindest Regards, " The Druid ".


    Not quite what I had in mind, but should give the general idea. Just substitute the H and V outputs of the dual LNB for the C and Ku band inputs.
    All seems a bit complicated to me. An easier way would be to use a dual output LNB.

    Leroy
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    Premium Member agarol's Avatar
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    Quote Originally Posted by beer4life View Post
    Please carefully read my post, to wit:



    AND in case you don't know, there are losses through the 'splitters' and 'switches', typically 3Db.

    Kindest Regards, " The Druid ".

    A misunderstanding on your part I think. I was making the point that, by using a dual LNB (ie dual polarity 2 in one or even 4 in one) would avoid the losses inherent in all the cable, connectors, switch and splitters.
    Of course there are losses through all that extra hardware. That's why I made the point.
    ag
    Energy is the father of creation

  8. #8
    Senior Member beer4life's Avatar
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    Cool Prove me wrong and I'll go to bottom of class.

    Quote Originally Posted by LeroyPatrol View Post
    All seems a bit complicated to me. An easier way would be to use a dual output LNB.

    Leroy
    Sorry Cobber,
    You don't seem to have read my post.
    That is the basis of what I have proposed in the first place.

    If I am remiss in my original explanation, feel free to let me know.
    Otherwise don't correct me and then parrot my statements.

    Can't be much on the box tonight.
    Kindest Regards, " The Druid ".

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    Premium Member LeroyPatrol's Avatar
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    Quote Originally Posted by beer4life View Post
    Sorry Cobber,
    You don't seem to have read my post.
    That is the basis of what I have proposed in the first place.

    If I am remiss in my original explanation, feel free to let me know.
    Otherwise don't correct me and then parrot my statements.

    Can't be much on the box tonight.
    Kindest Regards, " The Druid ".
    I reread what you posted and you haven't based your configuration on a dual output lnb. You mention a dual polarity lnb and that's why you need all those splitters and extra cabling etc. With a dual output lnb you can connect each box to it's own output as there is 2 and that's it.

    Leroy
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  10. #10
    Senior Member beer4life's Avatar
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    Cool Please give your entire solution.

    Quote Originally Posted by agarol View Post
    A misunderstanding on your part I think. I was making the point that, by using a dual LNB (ie dual polarity 2 in one or even 4 in one) would avoid the losses inherent in all the cable, connectors, switch and splitters.
    Of course there are losses through all that extra hardware. That's why I made the point.
    ag
    Sorry to be so adamant about this, but I'm not so dogmatic that I will not listen to another solution, show me some diagrams as to how you would achieve this.
    You may be neglecting the obvious, there are two receivers, one dish and one LNB.

    Aarr Well, back to my self induced stupor,
    Kindest Regards, " The Druid ".

  11. #11
    Senior Member beer4life's Avatar
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    Talking Money bags.

    Quote Originally Posted by LeroyPatrol View Post
    I reread what you posted and you haven't based your configuration on a dual output lnb. You mention a dual polarity lnb and that's why you need all those splitters and extra cabling etc. With a dual output lnb you can connect each box to it's own output as there is 2 and that's it.

    Leroy
    Haven't really explored that alternative, but methinks cost would be getting out of hand. Please give a quote for one of these as against about $3 each for splitters and switch. ($10)
    Seems I would be better off spending the change on a few beers.

  12. #12
    Premium Member LeroyPatrol's Avatar
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    Quote Originally Posted by beer4life View Post
    Haven't really explored that alternative, but methinks cost would be getting out of hand. Please give a quote for one of these as against about $3 each for splitters and switch. ($10)
    Seems I would be better off spending the change on a few beers.
    Your diagram is missing a diseqc as there needs to be one for each receiver so add another $10 to your quote as well as the 30 extra f connectors

    This is what you need.

    Leroy
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    Senior Member rob916's Avatar
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    Thank you very much for your help guys.
    Am I right in saying that a dual output lnb can output 2 channels, of which each can be H or V?
    I have to ring the bell for round three before this gets ugly.
    REMEMBER: There is always more than one way to accomplish a task.
    Last edited by rob916; 28-05-08 at 01:04 AM. Reason: peacekeeping

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    Premium Member LeroyPatrol's Avatar
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    Quote Originally Posted by rob916 View Post
    Thank you very much for your help guys.
    Am I right in saying that a dual output lnb can output 2 channels, of which each can be H or V?
    I have to ring the bell for round three before this gets ugly.
    REMEMBER: There is always more than one way to accomplish a task.
    2 independant outputs of which both are capable of H and V.

    Leroy
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    Senior Member cwispy's Avatar
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    Yes Rob. It is just the same as having a seperate dish and lnb for each box. However, what nobody seems to have stated so far is that if you only want one box at a time, you could simply use a splitter which has power pass on both legs and just turn off the receiver which is not in use. I dont mean standby, as some receivers will still power the lnb whilst in standby, but I would still suggest that a dual output lnb is a better solution. Seeing as you have a provider box, you will probably want a 10700 dual lnb so the provider box can be used. They generally wont work with universal lnbs.
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    Premium Member mickc's Avatar
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    take the loop out and use a splitter
    turn the box off you are not using
    lnb settings stay the same
    simple

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    Senior Member cwispy's Avatar
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    @beer4life - The lnbf your talking about is most commonly referred to as a twin output lnb these days and if that was used, it would simpler to input the signal to a multiswitch and output to each receiver from there. Why you have proposed such a complex design for such a common place scenario I cant seem to work out, but im sure you have your reasons.
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    Senior Member beer4life's Avatar
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    Talking Bon soir, mes amies.

    All good fun and jolly good company.
    As you say there are more ways of killing a cat than choking it with milk.

    Good night all,
    Kindest Regards, " The Druid ".

  19. #19
    Senior Member cwispy's Avatar
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    Quote Originally Posted by mickc View Post
    take the loop out and use a splitter
    turn the box off you are not using
    lnb settings stay the same
    simple
    I beat you by 3 minutes. hehe
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    Senior Member rob916's Avatar
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    Appreciate your help.
    Pain in the ass to pull power on the unused box all the time.
    So twin output 10700 lnb is the go.
    I need to make up some cables, are F connectors just hex crimped ( is this the correct/least loss way )?

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