Hi GEuser
I Have one osc like you . But can runing user cal allway fail , and when mearsurement frequency wong.
Sigen 100Hz ==> OSC Display 150Hz
Sigen 1Khz ==> OSC Display 1.5KHz
Sigen 1MHz ==> OSC Display 1.5MHz
Sigen 10MHz ==> OSC Display 10.5MHz
It's allway multiple 1.5
I dont know way to check and fix ...