glitches on digital lines

Post any questions you may have about our current range of oscilloscopes
Post Reply
bonelli
Newbie
Posts: 0
Joined: Thu Jul 16, 2015 9:50 am

glitches on digital lines

Post by bonelli » Thu Sep 20, 2018 12:20 pm

Hi,

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

Image

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
Top
Martyn
Site Admin
Site Admin
Posts: 3469
Joined: Fri Jun 10, 2011 8:15 am
Location: St. Neots

Re: glitches on digital lines

Post by Martyn » Tue Sep 25, 2018 10:24 am

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.
Martyn
Technical Support Manager
Top
Post Reply

Return to “USB PC Oscilloscopes”