I have a Samsung 46in S6 with built in freeview and it works very well. Picture quality is good and reports a signal strength of 80ish.

Have also got a media centre with an HVR3000 card and I can't get a decent signal using the same cabling connected to the TV receiver.

I can get some channels but the quality is poor which would indicate a signal strength issue. I have a second card which performs identically. Latest drivers etc.

Have retermined all cables and connections.

Anyone have any thoughts?