My lovely new HD PVR arrived a few days ago and I love it. Sadly however, it doesn't do one pretty crucial thing - pick up HD channels. I am in London and receiving off the Crystal Palace receiver. I'm 11km away. Looking at digitaluk's site, I can see that the 'Mux HD' reception is at 100%. I have one aerial feed coming from an external rooftop aerial and SD channels come in fine. But the PVR doesn't even recognise the existence of HD channels and it's frustrating. I've read around a bit and heard things like I ought to do a 'manual tune on the UHF frequency' and so on - I have no idea what that means. Could anybody help with some basic tips?