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Model for digital inputs on more or less recent scopes

Sebastian Garcia
 

Hi there,

I'm wondering what's a proper electrical model for the *digital* input
channels on the MSO scope line (e.g., for the MSO4104).

Any comment will be greatly appreciated.

Thanks in advance,
Sebastian.

Jean-Paul
 

1 m or 50 ohm in parallel with input capacitor e.g. 20 pf.

Same as for analog scopes

Jean-Paul

Sebastian Garcia
 

Jean-Paul,

Thanks but, may you be confused? I'm asking about the digital channels
D15..D0.

After some time of searching found it in an appendix of the user manual;
seems to be 100 kOhm in parallel with 3pF for the P6616 probe.

Sebastian.

On Tue, March 10, 2020 7:20 am, Jean-Paul wrote:
1 m or 50 ohm in parallel with input capacitor e.g. 20 pf.

Same as for analog scopes

Jean-Paul