Eric R Snow wrote:

The display shows the square wave with 6 divisions vertical and just over
10 divisions horizontal. Using the VAR knob in the center of the time/div
knob I can adjust the display to show exactly 10 divisions. When this is
done is the display correct? Or is it the calibration bar that is wrong?

Do me one favour:
Please don't connect your scope to the mains or then genset. It might
kill you, judging from the questions you ask here.

This bar is labeled as 300 mV 30mA ~1KHz.
~
This means "about". And you will get only about. Noone cares about the
frequency. The rect-wave is for calibrating the Vpp and the compensation
of the probe. Nothing more.


Thanks,
Nick
--
Motor Modelle // Engine Models
http://www.motor-manufaktur.de
DIY-DRO - YADRO - Eigenbau-Digitalanzeige