I do not have a SF8008 at the moment. But I asked many people to help which photos of the components to check wish possibilities we have. Nothing until now happened.
I opened it up and voided the warranty on mine, and this is what I found:
It seems this is an RDA5815. It is possible to find datasheets for it, and the specs says it goes as low as 230 MHz (!) but the datasheets i found do not include programming info.
I'm still struggling to rebuild OpenATV from source (before I can attempt to make changes) but I thought this would be of interest.