Pulse trigger, right ?
Try a normal edge trigger and drive the scope yourself rather than let Autoset think it knows best. ![Flogging A Dead Horse :horse:](https://www.eevblog.com/forum/Smileys/default/DeadHorse.gif.pagespeed.ce.kBWvHKqCd1.gif)
Yeah you're right. I switched to rising edge and moved the trigger to about 80% of the peak and its now showing only 1 frequency.. and exactly what I expect it to be.
Note to self: If silliness on the screen, forget Autoset. :-) Thank you