Lesson 13: Triggering Part 4 - Advanced Parametric Triggering

When input signals are more complex than simple repetitive sine waves and square waves, it can be difficult to trigger the oscilloscope to display stable waveforms. This lesson first shows engineering students how fast waveform update rates of the oscilloscope can reveal random and infrequent “problem” signals. The instructor then shows students how to use advanced parametric triggering to isolate “problem” signals including an infrequent narrow glitch and a non-monotonic edge.

#oscilloscope #scope #trigger #triggering #scopetriggering #oscilloscopetriggering #glitch

[MattLaubhan]

Keysight oscilloscopes with touch screens (not the ones shown in this video) have a "zone trigger" feature that can be useful for capturing certain waveform phenomenon (possibly infrequent events as well) by drawing a region on the screen with your finger. Zone triggering is an extra qualification for the trigger condition. In addition to the base trigger condition (rising edge, pulse width, etc), the oscilloscope will only trigger when the waveform either intersects (or does not intersect) the region or regions.

[thomasmaughan]

I had no idea this capability existed. That's amazing!

[ernestb.]

Hi, great series for beginners. I had a fundamental question. How, in general, scopes present the waveforms on the screen? Lets say we have some high Waveform Update Rate, like 100k Wfps. How often is the screen actually been updated and if suppose that would be about 30 to 50 frames per second, are those 100k Wfps all shown divided on those 30 to 50 frames per second. We would have about 2k Waveforms to show every frame. Are they just over-layed on top of each other? Or in some other fashion? Thanks in advance!