If it has to do with reception, here is a dedicated sub-forum for that.
Are any of your OTA stations VHF or are they all UHF? If so, that isn't the most ideal antenna. Are they all in one direction, I see there is no rotor?
The dismal selection of DVR's in this country is pathetic, especially if you compare what is available in European & Asian countries where there is no or little interference (restrictions) from a single manufacturer and/or the movie industry.