At 500MHz, it's not completely insignificant that the 10073C is a 2.2M probe. By designing for a 2.2Meg input divider (and not a 10Meg divider)? it makes it much easier to achieve good compensation across a 500MHz bandwidth. I assumed it was common knowledge that these are not 10M probes.?
So the first simple test the OP should be doing is to see if it s a 2.2Meg probe.
