Products > Test Equipment
Equipment to measure RC filter attenuation
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tautech:
Then set everything up at HiZ then and you'll have no voltage limits and not load the filter.

Lemme connect the bandpass RC filter I have here to Bode plot (No SDS2000X Plus available) but it will be with SDS1104X-E or SDS6204A and sweep it at low levels, something I've not done before but only a 10x attenuator to get 'right down there' could be an issue but we'll suck it and see how it goes.
Get some rest as it might be a few hours before I can get onto this.
slugrustle:
What do you mean by HiZ?  I only see 1MΩ and 50Ω input impedance options on the scope.  One of the filters I was testing had 110kΩ impedance at DC, hence preferring the 10MΩ load of a 10x probe vs. the 1MΩ scope input impedance.
tautech:

--- Quote from: slugrustle on September 15, 2022, 12:46:25 am ---What do you mean by HiZ?  I only see 1MΩ and 50Ω input impedance options on the scope.  One of the filters I was testing had 110kΩ impedance at DC, hence preferring the 10MΩ load of a 10x probe vs. the 1MΩ scope input impedance.

--- End quote ---
https://www.maximintegrated.com/en/glossary/definitions.mvp/term/Hi-Z/gpk/1175
slugrustle:
Right, that is a standard definition of the term.  Can you explain what you mean in the context of this thread?
tautech:

--- Quote from: slugrustle on September 15, 2022, 01:23:27 am ---Right, that is a standard definition of the term.  Can you explain what you mean in the context of this thread?

--- End quote ---
That I'll be using HiZ scope inputs and AWG output, ie. 1M

If we refer to your SDG2000X specs, the output can be either HiZ or 50 Ohms and when we set up both the scope and AWG input/output settings to match the measurements/settings on each will match.

As such we need set the Bode plot settings correctly for this to hapen so to get properly accurate measurements as a result.

A strong advocate of SDS2000X Plus Bode plot, member mawyatt has joined the thread and I hope he can offer some further tips based on his extensive experience with this feature.
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