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Uploaded on Feb 25, 2012
Instek SFG-1003 feeding a Rigol DS1052E. It starts off with a triggered and locked signal. Then I change the vertical scale and it loses lock. I move the signal into view and show that the trigger is in the middle. Then I change it to a square wave and it locks. Again I show the trigger location. Finally, I change it to a triangle wave and it loses lock again.