glitches on digital lines

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glitches on digital lines

Post by bonelli »


When probing UART Tx/Rx signals with my 3204D-MSO, I sometime have some glitch on the lines.


I did never experienced this kind of problem with other scopes (Lecroy, Rohde & Schwarz).

Changing the input threshold did not solve the problem. Some threshold results to unexpected results because the scope trigs on a glitch.

What is the input impedance of the digital lines ?
Thank you

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Re: glitches on digital lines

Post by Martyn »

The input impedence of the digital lines is

200 kΩ ±2% ∥ 8 pF ±2 pF

can you post a psdata file so that we can see your settings, and let us know what trigger threshold values you have tried.
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