HDHomerun poor signal in TVHeadend but perfect on EyeTV

Hi,

I have tuned my HDHomerun in TVHeadend and it reports 100% signal. When I connect via EyeTV on my mac I get a perfect picture.

The problem is that in TVHeadend on my Raspberry Pi the signal has alot of noise and is breaking up.

Any ideas?

Thanks
Dave

Tvheadend