Oscilloscope Fundamentals Part 3
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- เผยแพร่เมื่อ 16 ม.ค. 2024
- Trigger…what is it? How to use it? Is discussed at some length.
The Fnirsi DSO 152 is the demonstration platform.
Even experienced scope user’s can overlook selected Trigger Mode and can lose the plot.
Thorough understanding and cognizance of trigger is a must, to minimize frustration and potential misinterpretation. - ยานยนต์และพาหนะ
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Very helpful on the triggers.Didn't know that about normal mode.
Thx for taking the time to watch this stuff 👍
Thank you very much sir..❤❤❤
Thx for watching 🍻
I'm pretty excited to get this unit. I'm also pretty stoked it has the trigger where you can freeze the screen.
A number of years back, we did an electrical load analysis on an aircraft to see whether the current generators were strong enough for all of the equipment onboard. After several engine runs, we determined the generators were strong enough.
However, when you would turn on one piece of equipment in particular, the displays would flicker off for a few seconds seconds and come back on. It was too fast for multimeters which showed 28VDC the entire time. The avionics shop happened to have an oscilloscope that we plugged in an extension cord to the building, and repeated the test. That trigger saved the day, and we observed when we turned on that piece of equipment, aircraft bus voltage dropped from 28VDC to 0 Volts for three... Yes three milliseconds. That was enough to mess with some of the displays.
We'd never have been able to see it without that trigger function. So to have it in a little handheld $30ish dollar oscilloscope is amazing.
Trigger is essential to understanding how to get the most out of your scope. Unfortunately…on the DSO 152 you can not adjust the trigger with respect to X axis, meaning the waveform triggers at the extreme left hand of the screen. (In normal, sometimes better to Auto, let it scroll and capture manually (Stop)). Very annoying. Thx for watching 🍻
Very very basic... but very very useful and extremely clear for newbies. Thanks!
Doesn’t get any stripped down than this rig. Thx for watching 🍻
Great video. I learnt a great deal. thanks
Thx for watching 🍻
Well explain .... Keep the good job!
Appreciated. Thanks for watching 👍
Thanks for the reply mate and for the great info very much appreciated. I think I might get the Fnirsi DSO 152 to learn a little that get the pico.Cheers
Excellent.. I just bought one of these little jewels and now that I have watched all three of your vids I am ready to use this thing correctly..❗
Great little tool for the money. Thanks for watching 🍻
Well explained 👏 I have to run a test my self. That auto button makes things easy, and can turn in to a bad habit 🤪. Thanks for taking the time to explane.
Thx. Don’t get me wrong the “Auto” function is awesome. Just not great if you’re trying to fully understand things…Resist the temptation 🤣🍻
An unexpected treat thanks for the lesson 🙏
Thanks for following the little micro series. 🍻
Good Job! Thank you.
Thx for watching 🍻
Thank you for the videos
Thanks for watching 🍻
Brilliant! Thank you! Probably the best, most clear and informative series on TH-cam I have ever seen and I watch a lot of videos! 😅
Just a note: Using your examples on screen, I get the same peak to peak voltage, but a Vmax of 1.8 and a Vmin of -1.8, do you have any idea why that would be? Cheers Harley
Thx again. Little difficult to say without actually seeing it, but is it possible you had the coupling selected on “AC”?
@@TheGibby3340 thank you for your reply, a calibration seemed to have cleared it up so hopefully this solution, like your videos, may be of help to someone else.
However, as others have noted elsewhere the unit gives an error when reading voltages below 1v. eg. I measure a 12v battery which measures 12.7v when the units are 1v or higher, but under 1v the voltage shows less than 12v (9v, 6v etc) in the numerical data at the top.
Another You Tuber made a video about this but I’m not sure if I can post links.
My personal opinion regarding this is that the unit only calculates the data from what is displayed on screen and if the measurements are beyond the limits of the screen the data becomes incorrect.
I will try and post the video in another comment here for everyone’s reference.
@@TheGibby3340 th-cam.com/video/Ti_rV5W_fqA/w-d-xo.htmlsi=4vtU5P35se8eq_s_
@@TheGibby3340 in case the link I posted was declined here is the title of the video on You Tube:
Troubleshooting FNIRSI DSO152 Oscilloscope: Fixing Incorrect Voltage Readings (Calibration Tutorial)
This is definitely something to be aware of with this unit but better minds than me maybe able to explain.
Excellent set of videos, great help as I am looking at a Hantek 1008C 8CH USB 2.0 Automotive or Pico 2204A. But don't know which one is the better for automotive as a lot of people say the Pico has the better software. Thanks for taking the time to share. Cheers
Although 8 channels sounds very appealing, the reality is that the 1008 is painfully slow. It is a very rare occasion that more than 2 channels are put to use. But the Hantek is cheap and simple to use, you are likely to “outgrow” it very quickly. Pico make a great product. I made the mistake of selling my 2204A some time ago. Software and hardware are far superior. Speed & image capture capabilities are well worth the slightly steeper cost and learning curve. Thx for watching 🍻
Can this scope use a current clamp? Measure injector voltage ? Great video by the way. Like the way you simplify things.
Yes it can. This scope is equipped with a mini BNC connector. So an adapter (BNC female to MCX male) is required. Think I paid $4 for one. Equipped with a X10 attenuator it will be fine for injectors. (again the previously mentioned adapter will be required). Thx for watching 🍻
really i formative for triggeri g
👍
Just a curiosity, is this like uScope? How would you compare the two?
Sorry I don’t know. I have never been interested in uScope as it has always struck me as over priced. Being the cheapskate I am, at $20 USD even I can rationalize that 🤣 Thx for watching. 🍻
Tend to agree. I am learning the scope for independent shop automotive diagnosis purpose and stuck which one to choose from. What advice would you suggest? BTW, thanks for sharing your insights@@TheGibby3340
@bekomcar554 If you are new to scopes, the model in these videos (Fnirsi DSO 152) is a great starting point. Appreciate that it is only single channel, and you will “grow” out of this very quickly. But with a price tag equivalent to half dozen cans of beer….So what. Automotive tech’s at a professional level, typically use a multi channel scope. 2 channels minimum preferably 4. Multiple channels are useful for correlation purposes (cam/crank position for example). PicoScope and Snap On both manufacturer great products. Problem being, purchase prices are very high indeed. The best scope I have is a Snap On Modis scope/scan-tool. Outrageously priced when new. I purchased it used for $450 Canadian dollars. There are many options available, from many manufacturers. Define your needs and research your options. Prices vary widely. Good luck. 🍻