Due to a minor set-back, I had to revert back to an old 84cm CRT TV, with no RCA input.
I thought "No problem, theirs a RF input/output on the decoder"... But the problem is that the video is so poor on channel where Top TV is picked-up, but the audio is fine. Indecently, the rest of the channels are also unusable when the aerial is routed through the decoder! When I remove the decoder from the setup, the terrestrial channels are fine.
The conclusion that I make, is that there is a major signal loss in the decoder (or on the RF output).
Any suggestions, or is the RF on my decoder buggered?