Hi Guys, I recently acquired a Tektronix 475 scope. While testing it with the internal squarewave calibrator I noted the trace was wide, I tried the second probe, same thing. Then I happened set the probe cable across the top of the scope, when I did that the trace got thin or more normal. I tried a third probe it is better but the trace width varies somewhat depending where the probe is positioned, any ideas?
Mikek