I don't know why you guys think I don't have another oscilloscope lol. Is it the female name?
I've just never messed with an analog scope before is all, and I'm used to using newer stuff that "just works"
Like I said my other probes are similar (Agilent 12pf) and I know the lecroy probe works fine.
Anyway I just tried a wire going directly from the connector to the CAL output and the waveform looks the same so I guess the problem is with the oscilloscope itself.
The reason I assumed you don't have another oscilloscope handy is that if you do, the totally obvious thing to do is to look at the calibrator output of the Iwatsu with a known good scope and vice versa. You've verified that there is a problem with the oscilloscope but now you would want to determine whether it is the calibrator output or a problem with the rest of the oscilloscope. With the additional information you provided it seems clear that the problem is with the scopes input circuitry, but have you tried the other channel?
As for others making assumptions about your gender and "mansplaining", the real issue is that despite other advanced knowledge you may have as an automation engineer, you are asking a very basic question here that reflects a lack of familiarity with the topic at hand. If the topic is old analog scopes, I'm pretty sure you could learn quite a lot from this forum and plenty of people will be happy to help. Other new members have asked similar questions and gotten similar answers so nobody is discriminating against you. I see nothing in your initial query that would indicate that you know about calibrating probes. In fact, your comment about the Agilent probes being "similar" because they have an
input capacitance of 12pF indicates that your knowledge of the matter isn't as complete as you might imagine. But I won't "mansplain" what the term "compensation range" means to you unless you ask since it probably isn't relevant to your immediate issue.