On 18/05/2011 22:24, Herbert Graf wrote:
> On Wed, 2011-05-18 at 17:53 -0300, Gerhard Fiedler wrote:
>> Some have mentioned that some satellite receivers use the connection to
>> control the LNB. In this case, I don't think this is the case, or at
>> least it doesn't seem to be a problem. The thing is that we have two
>> receivers. One is currently not in use, but it could be used. I want to
>> connect this second receiver, to a location 50 m away. I figure that if
>> I can connect two receivers to the LNB (AFAIK the cable would simply be
>> split), the receivers can't do any individual configuration of the LNB,
>> or else they could be fighting each other.
> I don't know exactly which service you are using, but usually for DBS
> type service two receivers will require 2 lines to the LNB, no way
> around that. You cannot "split" the cable.
>
> TTYL
>
It depends what satellite he is using

If Gerhard tells us, then I will know if the cable can be split or not.
A Quattro ku LNBF of course uses four cables and then each of those can=20
be split, then you can feed up to 2000 receivers with multiswitches.
(my site http://www.techtir.ie/tv-radio/satellite-distribution )

There are satellite services on C-Band. Ku Band and Ka Band that only=20
need one polarisation and one band (C-Band only ever uses one band).

The newest Ka-Band service in Europe has 82 spots, but each one is a=20
single band and polarity, so LNB feed can be split for example
http://www.techtir.ie/saortv/saorsat-coverage

www.lyngsat.com you can see quite a few services that can use an LNB=20
feed that can be split.

It's certainly generally true that most services you can't split. A=20
Stacker / Destacker needs a Twin or Quad LNB and only works up to about=20
10m. I recomend against them and that 2nd or more cables are run. A Dual=20
LNB is for H & V separate (usually only on C band or old Ku), most Ku=20
needs Quattro for distribution systems with more than 8 receivers. Twin,=20
Quad and Octo can drive 2,  4 or 8 tuners direct without a Multiswitch.

--=20
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