The other thing to do is to make sure you are compensating it correctly. Also, you should see quite a difference in the response of the compensation if it is a genuine 10073C compared to a regular 10M probe. The 10073C compensation should appear tighter as it is adjusted as it is compensating for a lower Z divider in the probe.
The compensation is much easier for a 2.2Meg probe and therefore it's much easier to get a consistent frequency response with a genuine 10073C probe.
A regular 10Meg probe will be fairly awful in comparison.?
