Siglent SDS1104x-e Scope easy way measure pulse period? - Page 1
Forum section: electronics / testgear

author: frank2644
author_rank: Contributor
timestamp: July 12, 2024, 06:45:30 pm
content: I have a fixed duration pulse stream and I need to measure the varying period between each pulse. Sometimes hundreds of pulses and most pulses have a slightly different period, sometimes growing larger, sometimes growing smaller.. Okay, maybe I don't have to measure every pulse, maybe just sample some of the pulses to have some confidence all is well.1) I know I can use the cursors to measure the period of any pulse, but that gets tedious. Be nice if there was a snap to edge ability for cursors.2) Alternatively, in the Measure menu under delay there is an FFFF function (Time from the first falling edge of channel A to the first falling edge of channel B.) And you can choose A and B to be the same channel. That seems to measure the period that I need. However it only measures the first pulses captured and trying to get it to measure a different pulse via horizontal controls is also tedious.If anybody has a quick way to measure pulse period of individual pulses, please give me some ideas.Thank you,Frank

author: noisyee
author_rank: Contributor
timestamp: July 13, 2024, 06:58:49 am
content: If you don't have to know every single pulse period, just want to make sure they all fall into a specific range, turn on Statistics in Measure menu. It will give you some basic statistics information, like max, min, stdev, etc. of your measurement.Also, try to use Positive Width or Negative Width in Horizontal measurement, they will measure all pulses' period in the screen, not only the first one.

author: frank2644
author_rank: Contributor
timestamp: July 13, 2024, 04:57:32 pm
content: Thanks, noisyee,I didn't know about the Positive Width and Negative Width features that you mentioned. Those seem to measure the average +/- width of all captured pulses. And that will be useful to me for other situations.In the meantime, I'm using the horizontal control to move the required pulse to the first on screen for FFFF captures. That's awkward as it's hard to keep track of a particular pulse when moving it. Although keeping track is a little easier by identifying the pulse with an Event marker. It would be nice if the FFFF applied to the chosen Event (which is on the vertical centerline) instead of the first on pulse on screen.Thanks, again,FrankP.S. Any other suggestions are welcome.

author: marco58
author_rank: Newbie
timestamp: July 15, 2024, 09:30:10 pm
content: (sorry for my english)What about using zoom?In top half screen you can move and choose period to measureyou must choose Z1 for channel 1 and I think the measure is made only relative to bottom half screenattached a screenshot of a similar measure I take some time agociaomarco

author: frank2644
author_rank: Contributor
timestamp: July 16, 2024, 01:43:18 am
content: Thanks, marco58,Yes I tried zoom a couple of days ago and it was helpful. Although I think it averages the measurements of all the pulses in the bottom of the screen so you have adjust to display one pulse.Again, Zoom was helpful, but I didn't use it and I can't remember why. I'll give it another try next time.Thank you,FrankP.S. Please don't apologize for your English, it was good. I should apologize for expecting you to read and write English.