I have an antenna on my house and it's connected to an HDTV. I want a device to perform the functions of my old VCR -- record different channels at different times, record one channel while I'm watching another, etc. I don't want to sign up for cable or satellite and I don't want to pay for the services that these DVR's offer for program lists, etc. I just want it to record programs for me like my old VCR. Can these machines be manually programmed and operate without the monthly service offered by the DVR companies? Thanks.