Signal problems on twin LNB

[sharp]

Hello

I have two twin-LNBs on a offset dish. One output from each LNB goes through two different diseqs to two receivers. I have a good quality on one receiver and very poor on another from both LNBs I checked cables, switched diseqs but the problem remains. I need to mention that two diseqs are not the same. One is quard and the other is twin. One LNB is Opticum and another is GT-SAT.
What am I doing wrong? Do I need some additional features enabled on receivers, 22kHZ or whatever? Maybe do I need a special diceq? I red somwhere that twin lnbs require a high isolation diseq!
Any suggestion?

 

[satelliteman]

Moved your post to a new thread

Sounds like a possible receiver or switch problem from your description. See if you can swap over the receivers to eliminate dish and DISEqC switches.

 

[Lazarus]

Is this a recent "fault"/ ie Has this arrangement ever worked successfully?

Have you swopped the Receivers over to see if the problem shifts with the Receiver or if it remains at the same Position?

Edit: I see SM has had three Weetabix this morning!

 

[sharp]

Is this a recent "fault"/ ie Has this arrangement ever worked successfully?

Have you swopped the Receivers over to see if the problem shifts with the Receiver or if it remains at the same Position?

Edit: I see SM has had three Weetabix this morning!

It never worked if I remember well. I have swopped receivers also and the problem swopped also from one to another receiver.

 

[satelliteman]

Check downlead, connections and the DISEqC switch.

 

[Lazarus]

Even if the cable appears undamaged and free of water ingress, is it possible that it isn't actually decent quality double-screened cable suitable for Satellite use?

I mean, heaven forbid that anyone would inadvertently use a lump of old UHF TV co-ax! ;)