I had my first THR22 installed about 4 weeks ago with a new dish. On all recordings and time slip live Tv I would get a few artifacts/blocking during playback. It resembled occasional signal interference but never appeared during live playback so I ruled that out. I assumed a corupt hard drive so I had DTV send out a replacement. The replacement THR22 is doing the same thing. Has anyone else had this issue or have any idea what might be causeing it other than another bad hard drive? It seems unlikely that I would get 2 bad units doing the same thing. Is there anything eles in the "chain" that might be causeing this? Thanks for your time. BTW What are the "in line filters" on my cables coming into the THR22 for?