There is no antenna connections on the HR24. You will need to add an AM21 (or AM21N) to do that.
Whoever told you that is completely misinformed, which unfortunately seems to be quite common with CSRs.skizer said:Hello all-- I just received an HR24 this week and was told when I activated it over the phone that I could hook up an antenna (rabbit ears) to the back and it would bring in any local channels that the antenna picked up.