Hi everyone. I just upgraded one of my 301 receivers to a 510 and I love it. The manual says, "The remote control uses both UHF radio signals and IR signals to control the receiver." Along with the 510's included remote I noticed that the remote for my old 301 can also control the 510. My question is when I am using the included remote and changing channels on the 510 is the remote changing the channels via UHF or IR? Also, is there a way to disable UHF and control the receiver via IR only? The only reason why I am asking these questions is because it looks like my old 301's IR-only remote seems to change channels faster and scroll through the guide quicker on the 510 than with the 510's included remote control. Thanks for the help.