Newbie question here... I was thinking about upgrading my HR10 Directv TIVO to an HR20 DVR as a result of our recent HDTV purchase. Occasionally we take our HR10 with us camping on weekends. Will we have problems using our HR20 with our standard definition television in the camper?--Obviously I realize I will not be able to watch Hi-Def on my SDTV in the camper, but will I face other issues? Thanks in advance for any information.