SICILIAN:
1) Loop through
2) Is this what you are after? 20180501_134411.jpg
3)Manual scan for each channel of local transmitter, and on both tuners. I have since done an automatic scan using ABM, as suggested by adm, but with no improvement.
Andy_Hazza:
I'm using the same cables as previously with the Toppy. Connections appear to be OK.
adm:
I've done what you suggested with no improvement. Should I have cleared the tuners first? I think it found something like 96 video channels, but when I select any of the SD ones using the EPG button on the remote I still get "Tune Failed".
The signal strength on the Toppy was around 70 for the 10k channels and low 90s for the 20k channels.
Incidentally there is ONE SD channel I can get, which is Film 4 + 1 which is the only SD channel on the HD MUX. Does that make any sense?
Anyway, thanks everyone for your replies so far. Please keep them coming but I probably won't be free to reply until around 7pm.