I also have heard that pvc won't show up on your graph. Was told that if you switch you graph over to flasher mode you could see the pvc. I don't have any first hand knowledge of this but plan on checking it out one of these days.
Would be interested in other comments from the board as to the veracity of this info.
“There is no difference between communism and socialism, except in the means of achieving the same ultimate end: communism proposes to enslave men by force, socialism—by vote. It is merely the difference between murder and suicide.” Ayn Rand