Hi all,
So a while back I had the good fortune to find a brand-new, never used P6201 probe and accessories. The probe by itself is of course rated to 900 MHz, 100 Kohm, 3 pF. It comes with a slip on 10x 1 Mohm, 1.5 pF divider as well as a slip on 100x 1 Mohm, 1.5 pF divider. Both the dividers have standard screws for compensation.
The scope I am using the probe with is a 2465B. The P6201 is powered from an external 1101 power supply and is set for internal 50 ohm termination, AC coupled, DC offset off. The calibrator signal is 5 Hz-5MHz and it says to compensate probe at 1 ms/div horizontal. The 100x divider seems to compensate nicely, however the 10x divider won't (seemingly). The photos in this album I uploaded (
/g/TekScopes/album?id=89686) show what happens from 1 ms/div, 20 us/div, 2 us/div, and 100 ns/div. It seems to get after a certain point as I speed up the scope.
Before I go and blame the 10x divider for being bad, I'm thinking that I might be fundamentally misunderstanding how to compensate when using an active probe? I read the P6201 manual and it only mentions the compensation screws in the dividers. Doesn't say anything special about using them, so I assumed that it should work just like compensating a passive 10x probe. However, since it looks better at fast horizontal settings, I'm thinking this might just be how this probe behaves at low frequency (relative to it's own passband)? I hope this is a PEBKAC (problem exists between keyboard and chair) problem rather than an issue with this probe...
Thanks,
Sean
