MacBook Pro causing interference with EyeTV while charging

Hi,
I bought an EyeTV DTT a while back and it just will not display anything while my MBP is on AC power, the signal quality drops from around 80% to zero. I also noticed by accident, that if there is current running through the magsafe (I accidentally let it touch something metal), the same interference is caused even if it is not connected to the MacBook Pro. Any help would be appreciated. Thanks.
Graham

Thanks but I've tried both USB ports and tried moving the device away with a USB hub and a USB extension, both didn't work.

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MacBook Pro causing interference with EyeTV while charging

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