I received my XRS with the Garmin interface cable yesterday and went out to the airport to do a ramp area test in my C182 before an actual flight. When I powered up the XRS without the Garmin 496, it seemed to display the airport traffic fairly accurately. I then connected the Garmin 496, changed the XRS setting to Garmin, and the Garmin 496 interface setting to “TIS In”. The Garmin then showed “Data Available” in the TIS interface status screen. However, I could no longer get traffic alerts.

I realize that switching the XRS to Garmin mode will prevent the XRS from showing traffic on its screen, but I thought instead the Garmin TIS widow would pop up to show the traffic on it. It did not. Could this be because I was on the ground? If so why did the XRS screen show the traffic when not connected to the Garmin?