I also think you will find that the switching is done using a 22Khz tone, not 2Ghz but I could be wrong.
From my understanding of DPP gear that's correct - it uses DiSEqC
signalling which uses a 22kHz carrier, but I was referring to the DPP requirements for cabling and other components:
· Materials used in a DISH Pro or DISH Pro Plus installation must be rated to 2150 MHz and pass DiSEqC 22 KHz tone.
DP and DPP "stack" the signals so you get even and odd transmitters at the same time on the wire, that's why the cabling has to support 950-2150 MHz rather than the older 950-1450MHz for a non-stacked signal. More info here: http://dishuser.org/dishpro.php
Every item between the receiver and the LNB has to be up to snuff, so one badly crimped F connector could be enough to give you flaky results. As others have mentioned, the problem in this case doesn't tend to follow anything other than the 9241/DPP-Twin combination, so inadequate power from the 9241 could be the issue. Still, that should be rectified with the 6131 connected since I believe that the DPP-Twin doesn't care if it gets power from port1 or port2; none of the documents I've read mention it being important, just that a DP or DPP receiver is required on one or the other if a legacy receiver is present.
Originally Posted by Burge
6131 + 9241 (with separator) + DPP Twin = 6131 working, 9241 not working
Just out of curiosity, does it work with the receivers connected the other way around? This would indicate that the LNB isn't getting sufficient power from the 9241 and is fussy about which port gives it power.
· 9241 (with separator) + 6131 + DPP Twin
I mentioned my DPP44 switch oddness not to suggest that's it's directly applicable in this situation (since Burge doesn't have a DPP44), but to indicate that something that shouldn't
have made a difference got things working in my case. Moving the living room feed from one DPP44 to another shouldn't have changed anything, but it got my living room receiver working through a DP separator when I went from a single tuner to a dual tuner.