Multiple LNBs with several diseqs

Reyman

I want to use three twin LNBs (two cable outputs from each) in order to receive three satellites and put a receiver in two separate rooms. I understand I need two 4-way diseq switches to do this.

However I've been reading some advice (ref, Southern satellite superstore) that suggests this doesn't work. I'm wondering does anyone know are they right ?

Extract: " You will not find on our site 2.3 or 4 satellite kits with twin or quad LNBs and more than one diseqc switch to either two receivers or a twin tuner receiver.
REASON.
Whilst it should all work in theory, in practice (depending on the combination of switch positions) you can get no signal on a satellite when it should all work. This is because twin LNBs and Quad LNB should be fully connected to work properly. It may be OK to connect to two outputs of a quad but you have to experiment to find out which two. With a twin, one side has a good connection to the internal power supply circuit and the other is almost like a passive device and relies on power from the second receiver to work properly. If you connect two or more diseqc switches, they take power away from some of the outputs of the twin or quad LNBs (depending on the switching at the time) and things go wrong. "

Tony

I've installed twins with multiple diseq switches with no problem but I can see the point hes making although this may only be with certain brands of lnb's and switches.

watty

It should work

But another option is Quad or Quattro + 2 Quattro + 16 way Multiswitch.
Then either or both receivers can be dual tuner PVRs and you can have up to 8 PVRs or up to 16 ordinary receivers, or a mix.

I've used twins and Quad with only one o/p connected.

Reyman

Ok thanks lads. That puts my mind at rest.

I thought there might be some issue of rigging up a dummy 75 ohm termination on the unused outlets to get a proper impedance match

Bozacke

Reyman,

I just recently connected 3 dual LNBs to my 80cm Lidl's dish and I now have both outputs going to two 4 -1 DiSEqC Switches feeding to two SL65 boxes connected to two TVs in two different rooms of the house and two of the LNBs were from the Lidl's kit and the 3rd was a salvaged LNB and I haven't had any problems at all...

Boz