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Electronics => Beginners => Topic started by: julian1 on February 21, 2017, 07:13:13 am

Title: Can I use 1:1 passive probes with 64pF shunt capacitance with a 1054z?
Post by: julian1 on February 21, 2017, 07:13:13 am

Does 64pF, imply actual compensation adjustment anywhere from 10pF - 64pF ?
 
The probes are these,

http://www.keysight.com/en/pd-1000000977%3Aepsg%3Apro-pn-10439A/11-2m-miniature-passive-probe?cc=US&lc=eng (http://www.keysight.com/en/pd-1000000977%3Aepsg%3Apro-pn-10439A/11-2m-miniature-passive-probe?cc=US&lc=eng)

If not - then can I change the capacitor trimmer?
Title: Re: Can I use 1:1 passive probes with 64pF shunt capacitance with a 1054z?
Post by: tggzzz on February 21, 2017, 09:01:08 am
Quote from: julian1 on February 21, 2017, 07:13:13 am
Does 64pF, imply actual compensation adjustment anywhere from 10pF - 64pF ?
If not - then can I change the capacitor trimmer?

It means the tip capacitance that loads your circuit is 64pF. *1 probes don't have a frequency compensation trimmer capacitor.

They can be used with a 1054Z scope, with the standard performance limitations.
Title: Re: Can I use 1:1 passive probes with 64pF shunt capacitance with a 1054z?
Post by: danadak on February 21, 2017, 12:56:23 pm
Of course you have significant circuit loading, at 1 Mhz Xc ~= 2.5K
ohms, quite low.

Completely out of the question to probe a crystal oscillator circuit
for example, at the crystal.


Regards, Dana.