The issue isn't (or shouldn't be) the PSW351T. It is a simple diplex-type socket with a couple of extra direct connections (Sat1 and Return), that all. The issue (if you can call it that) is the way the 608 designed to accommodate something that is becoming a rarer feature, and that is an RF out which adds the recorder box signal on to the Freeview signal as it passes through the recorder.
There's a growing discontinuity between what the 608 is designed for and what is provided with TV recorders. Freeview recorders rarely have a full RF Out function any more. What's there now is most likely a simple pass-thru arrangement that allows the Freeview signal to go through the recorder and then pass on up to the TV so it can be used independently. The days where you could watch the recorded output of a Freeview recorder on an RF channel tuned on the TV are dwindling if not already gone. So the idea of sending an aerial signal out of the 608 via Downlink Out, down to the recorder, and then picking that back up via the
Return socket on the wall plate and then sending it back up another cable to the Uplink In socket on the 608 really makes no sense. The aerial signal is travelling a long distance for no purpose, and along the way it is losing signal quality due to the increase in noise. That's not the same as saying you can't use the Downlink/Uplink sockets right now because you certainly can.
Downlink Out / Uplink In makes sense if you'll be using a Sky box. The feature still exists to play back or to view the Sky box output via analogue RF. There's a couple of caveats of course: (1) The other TVs in the house must have analogue tuners. That's also a feature being quietly dropped as manufacturers cut corners. (2) You need either the older version of the Sky box with RF2 out, or an I/O Link with built-in modulator with the newer Sky boxes. Providing both those conditions are met then the 608 makes a bit more sense. The signal paths are still a bit noisier though than direct connections.
Freesat boxes: My guess is that there'll be no RF sockets for an aerial signal at all on a Freesat recorder. If you want to watch and control a Freesayt recorder from another TV in the house then you'll need something along the lines of a Triax Tri-Link kit (
LINK, then scroll down). These are compatible with Sky magic eyes to provide control from other areas of the RF network.
For anything that does use the RF out to add a recorder's signal to the distribution system then the wiring is Downlink Out to the PSW351T diplex input. Then from that wall plate's RETURN socket connect a coax lead up to the Uplink In socket. If you're running a twin tuner satellite recorder [Sky HD box, Freesat twin tuner box] then also connect a coax from LNB1 Out on the 608 to the appropriate RF SAT socket on the 351T. That will provide both LNB feeds to the Freesat recorder. Remember though, you shouldn't run more than one twin tuner Freesat or Sky box HD off the 608. LNB signals are actively controlled. Running two boxes carries the risk of conflicting instructions and service loss.
