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Looking for a Probe to Use for 5V DC Power Supply Ripple Measurement
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David Hess:
I wonder what the common mode rejection versus frequency and isolation of that J2113A actually is; Picotest does not say.

precaud:

--- Quote from: David Hess on May 13, 2018, 11:52:32 pm ---I wonder what the common mode rejection versus frequency and isolation of that J2113A actually is; Picotest does not say.

--- End quote ---

It'll cost ya a cool fifteen hundred to find out... 

I wonder why their J2102A transformer isolates so poorly below 1kHz.
Cerebus:

--- Quote from: precaud on May 14, 2018, 04:57:58 am ---I wonder why their J2102A transformer isolates so poorly below 1kHz.

--- End quote ---

I'd presume that the core permeability was frequency dependent and the losses increase (or at the extreme the core just saturates) at lower frequencies. As I say though, a presumption, as I don't know what material the core is.
tggzzz:
If you aren't concerned with DC and are prepared to try a little homebrewing, you might like to experiment with Doug Smith's 1-500MHz balanced probe.
http://emcesd.com/pdf/cd94scr.pdf

I haven't tried it, so I have no valid opinion as to whether it might be relevant.
Kosmic:

--- Quote from: icpart on May 13, 2018, 10:16:14 pm ---Also I find another great improved version of that amplifier int that AN http://www.analog.com/media/en/technical-documentation/application-notes/an159fa.pdf

--- End quote ---

The amplifier described in an159 look really interesting. I will definitely try to build one of those!

Thanks for the link!
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