has anyone actually got this working? can you please tell me how it's all connected and what about the heartbeat cable? how does that connect to create a 3-viewing environment?
It depends on what decoders you have and what you want to do.
The 3-decoder solution only works with the New Explora decoders ( there are two of them Explora 1 and the Explora 2) and the single view HD decoders (4136 4U and 4S, and now from 1 November the 4137 5U and 5S) -- No older decoders are allowed in the mix.
Limited options for choice of LNB. For total future reception, you have only 2 options:
(1) The new Smart LNB (SLNB) model LMX501 - 2 flavours of this available from different manufacturers.
(2) A Quad or Quattro LNB plus a 24-1Z Multiswitch
--- ALL other LNBS no longer work very well. Neither do the SATCR LNBs because of changes to the software on the decoders, although if you have patience, you can get them to work -- sort of.
Then you need to decide on the infamous HB cable. Again 2 options.
IF each decoder in the mix is going to operate as a stand-alone decoder, with no or limited access to the recordings off another decoder, THEN you can feed the HB signal from the Primary decoder to the other two via the LNB cabling. there are a few tricks depending on which decoders you plan to couple under XV. The Explora 1 requires a diplexer behind it, the Explora 2 is supposed to work without a diplexer BUT it depends on circumstances. The 4136 decoders require diplexers. The new 4137 decoders are supposed to not need diplexers.
IF you want access to recorded material from any decoder anywhere then an analogue RF cable distribution is the better way and that cable handles the HB as well, but it is getting complicated and no HD content.
If you want send me a PM with what you want to do an I will send you a few suggestions.
The alternative is to place all the decoders in a single location and distribute signal everywhere via RF or using some or other fancy HDMI switch.