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Mount Vernon, WA | We like it, although I tell my students it's not practical for most troubleshooting. For example, in the case with this skidsteer, two voltmeters with an analog bargraph will do pretty much the same thing the scope is doing. The only advantage to the scope in this instance is that when we're done with the test, we can look at the two waveforms and note that they parallel each other (signal and output), which means the electrical side of things are sound. But then, two voltmeters held next to each other during the test will do the same thing.
The scope is pretty much mandatory when you're dealing with glitches that happen so quickly that a conventional meter won't pick it up. For example, if a cam sensor signal fades in and out while an engine is running, causing a stumble or a misfire, a voltmeter and most scan tools won't pick that up. The scope is also handy for analyzing cylinder compression waveforms, and using it to ID weak cylinders when the machine you're working on doesn't have that feature embedded in the software.
The other advantage to the Pico is that it interfaces with a PC, which gives you a much bigger screen, plus the ability to do things like using rulers to measure voltage or time, as well as math channels to convert a solid blob of PWM trace (you can see the blue blob in the first pic) to an average voltage signal, such as the black trace in the example above.
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