On 19/05/2011 22:22, Gerhard Fiedler wrote:
> What I have here needs two cables from the antenna to the receiver for
> dual-channel reception.

OK, then you have the regular Ku LNBF, a twin or quad. not the newer=20
"unicable" system.

There is 13V /18V and 22kHz on/off

but your satellite feed is only 10.7 to 11.38, well below the 11.7=20
needed to switch via 22kHz from 9.750 to 10.6 LO


Your cable signal is thus 972MHz to 1632 MHz with only 13V /18V switching.

You can't split the cable, so you should run four cables and then you=20
can add two regular receivers or one extra recorder off an Quad LNB.

If you ever wanted more feeds, you fit quattro and 1 or more=20
Multiswitches fed by the 4 cables to have 8, 12, 16 or up to 2000=20
receivers... :)

See http://www.techtir.ie/node/1003507#comment-1004343

The multiswitch not only lets you split a Quattro (or a Quad if it's a=20
compatible switch) to 16 or more receiver, but also lets you choose=20
versions with  more than one satellite feed in.

Sky of course do not enable "satellite position switching" (diseqc) so I=20
have the satellite LNBF needed for Sky as the 1st position because=20
without issuing commands from the receiver the Multiswitch always gives=20
1st position.

Back garden
http://www.irishwattystuff.com/amateur/images/dishes-w.png

the first dish has four offset feeds to 16 way multiswitch. Sky boxes=20
just work, non-sky boxes and PC receiver can pick any of the 4 satellites.
http://www.techtir.ie/blog/watty/mheg5-on-xp
(The PC has dual tuner for Digital Terrestrial on USB stick as well as=20
2x DVB-S2 satellite cards)

The 2nd dish is motorised and can get 48E to 56W approx, except there is=20
nothing pointing at Ireland on Ku more east than 42E and more west than=20
45W (I'm near 8W).  It's direct to a separate receiver.

the 3rd dish was experiment to see if 1.2m is big enough to get ANYTHING=20
on C band here. It has C band LNBF with adjustable F/D due to sliding=20
scalar rings. A bigger dish is needed. I know where there is nice unused=20
3.6m mesh..



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