Sample Rate Explained | Automotive Oscilloscope Diagnostics | Mechanic Mindset

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What sample rate do you need for your oscilloscope and when do you need to adjust it? We look at the effect oscilloscope sample rate has for automotive diagnostics and use the PicoScope software to adjust the settings and see the results. The oscilloscope sample rate can be adjusted to help with different diagnostic procedures.
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5 июл 2024

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Комментарии : 136

@rogershields2106 2 года назад

This is the most comprehensive explanation I have seen anywhere on sample rate; something many techs would do well to watch not just beginners. Very useful information. Thank you.

@MechanicMindset 2 года назад

Glad it helps! It does get a bit more complicated when we start chains the time base and limiting the waveform buffers, but this covers the basics 👍

@terry374w2 3 года назад

Thank you so much for your educational videos! I am a DIYer learning to scope with a 2204A and I would be no where on my learning curve without your content. Well explained so I can apply rationale to actual diagnostic situations. Please keep them coming!

@MechanicMindset 3 года назад

Great to hear this! I hope you are progressing well with your oscilloscope diagnostics

@yourlocalalexis4578 2 года назад

you are so right! i am so glad i found this video! We never had this kind of training in the 80's where we could tune in when we felt like it and go back on the next night, also...

@ThunderbirdRocket 11 месяцев назад

Thanks for sharing your expertise ! Super helpful !

@5layereddip142 3 года назад

Enjoying the content. Thank you!

@MechanicMindset 3 года назад

Glad you enjoyed it!

@TheGibby3340 3 года назад

Makes good sense Darren... Well done. Your point about dropping the sample rate in lieu of the filter function is well made. Cheers 👍

@MechanicMindset 3 года назад

Cheers Ian! Possibly a bit controversial, but it works. Thanks for the approval 👍

@yourlocalalexis4578 2 года назад

i love how you make things quite simple to understand and will start viewing your other videos, as i just retired and had bought a autel scope and needed to get educated a bit!!!

@Z14kt12timandjes1 3 года назад

Really helpful info. Thanks!

@MechanicMindset 3 года назад

Glad it was helpful!

@57dscott57 3 года назад

Really helpful, thanks.

@MechanicMindset 3 года назад

Glad you enjoyed it!

@johnddee8326 3 года назад

Great video well presented and nice clear explanation of the various sample rate functions.

@MechanicMindset 3 года назад

Cheers John! 👍

@TheCiano69 3 года назад

Great video. very useful info and well presented

@MechanicMindset 3 года назад

Thanks Rob! Glad you enjoyed it 👍

@i990749 3 года назад

Explained straight to the point and well presented. Really enjoyed watching this. Thank you for the effort. Keep the video’s incoming 😄

@MechanicMindset 3 года назад

Thanks for the feedback! More to come 👍

@billyyoder8171 3 года назад

Thank you Darren. Good job again. Have a blessed and safe week to you and your family.

@MechanicMindset 3 года назад

Cheers Billy 👍

@frankwrenchman4573 11 месяцев назад

Thanks

@LMAutoRepairs 3 года назад

I couldn't explain it any better...😋 👍👍👍

@MechanicMindset 3 года назад

Cheers Luis! If you really start digging, it can start getting complicated!

@davidmoss9471 Год назад

Excellent video Darren. I always have that thought whenever im capturing data of "have i got too much time on the screen" or "have i got enough sampling power to see what i want". I find it a balancing act that comes naturally over time as you get used to using the equipment and capturing more waveforms

@gcmd5852 3 года назад

Good explanation Darren👍🏻

@MechanicMindset 3 года назад

Thanks 👍

@CarsExposed 3 года назад

Great explanation Darren as always ... I was messing around with the scope today I’ll send you what I got 🙌👍

@MechanicMindset 3 года назад

Cheers Igor! Cool, look forward to checking it out!

@stephanevaucelles6378 3 года назад

good video . it's instructive for the diag thank you so much

@MechanicMindset 3 года назад

Thanks Stephane, hope you can use it at work 👍

@stephanevaucelles6378 3 года назад

@@MechanicMindset yes your videos enlarged my knowledge on the use of the oscilloscope

@robertmobileman8304 3 года назад

Good video I was hoping you would show the same test on the hantek , thanks for your time helping others

@MechanicMindset 3 года назад

Thanks! I will put it on my list! 👍

@saibabupodala6297 3 года назад

Thank you shared ur knowledge and good explain tq........

@MechanicMindset 3 года назад

You’re welcome! Thanks

@fixitman2174 Год назад

Thank you so much for this video. I now know why my Snap-On scope is so terrible. Both the Verus Edge and the Zeus have a sample rate of 6 MS/s for single-channel, and 1.5 MS/s for four-channel use. I'm watching for the Pico 2405A to become available again.

@GerardBurkeBurkesGarage 3 года назад

Well done mate, another very well put together video. I look forward to the next one 👍

@MechanicMindset 3 года назад

Cheers Gerard!

@MiracleMAX 3 года назад

Well explained. I describe it to my students as a flip-book. The greater the sample rate, the more pages are being flipped each second. Thanks for your enthusiasm with the scope. You are on the same page as me - they are a fantastic diagnostic tool. 😁 MiracleMAX

@MechanicMindset 3 года назад

That’s a good way to explain it. I use a similar analogy to explain triggers. It is a great tool and under used in my opinion. Thanks for watching 👍

@MiracleMAX 3 года назад

@@MechanicMindset I love my oscilloscopes, from the DSO138 I build from a kit, the recently purchased DANIU ADS1013D with touch screen and I am just about to purchase a Pico 4424 or something more recent in my price range. I am obsessed with oscilloscopes almost as much as I am with multimeters! 😁 I have 23......at the moment.

@MechanicMindset 3 года назад

@@MiracleMAX Haha wow! That is dedication. I just got a DSO138 the other day. Didn’t build it though. Just subbed to your channel so will check out your videos when I get some time 👍

@MiracleMAX 3 года назад

@@MechanicMindset Thanks! I have subbed to yours for some time. I even use some of you oscilloscope techniques when teaching my apprentices. Using a relay was an awesome idea for an inductive pick-up. Great stuff!

@ADDAUTOMOBILESERVICES 3 года назад

Great info

@MechanicMindset 3 года назад

Cheers, glad you enjoyed it!

@mg2361 3 года назад

Great explanation! Thank You! Your videos have enhanced my understanding so much about these 2204 scopes. May I make a request? How about a video of when you use the drop down to choose a lead (A or B), there is a box for selecting bits. What Bit setting is best for what application?

@MechanicMindset 3 года назад

Glad you are enjoying the video! Ok I will add it to the list. This is for vertical resolution and I do t think there are many automotive applications where we need to adjust this setting. I have played with it before, it didn’t enhance anything from what I could tell 👍

@niksforever 3 года назад

Great Video Darren :) Glad to see topics like these discussed on you tube..... Being an automotive engineer myself, i have always felt there should be more videos about diagnostics using tools like oscilloscope and picoscope ! Hope to see more videos from your channel. I just had one comment on todays video, you should have also discussed about nyquist criteria for avoiding anti aliasing when selecting a sample rate.

@MechanicMindset 3 года назад

Glad you enjoyed the video. What commodities do you look after in Automotive Engineering? Regarding the aliasing, I suppose this would be apparent on very low spec scopes on higher frequency repetitive signals; can you think of any common examples? Would be good to make a more detailed video covering this topic and being able to replicate aliasing will help get the message across. Thanks for the feedback! 👍

@niksforever 3 года назад

@@MechanicMindset My work involves control design for engines. Regarding aliasing, i am not sure how you can replicate it for demonstration on a vehicle. Generally, we see it during downsampling of very fast changing signals, one of such can be any pressure signals in the car where you would see some high frequency noise folding into the lower frequency domain.

@MechanicMindset 3 года назад

@@niksforever Cool, OK. I’ll do a bit of research 👍

@javonfitzgerald9377 Год назад

I believe that am the only DIY in my country that has basic idea of how to use a scope and it's mostly because of your chanel. Can't wait to get one

@MechanicMindset Год назад

Awesome!

@tt-rs1457 27 дней назад

What skope did you by , at least ?

@theGADGETSplaylist 3 года назад

channel growing at good clip Darren:)

@MechanicMindset 3 года назад

Yeah pretty pleased with how it’s going. Thanks for being a part of it!👍

@arthurfricchione8119 3 года назад

Excellent video and presentation. I don’t know your name and would like to so I can address you properly. Your videos are extremely helpful to me. You bring it down to level that anyone knew to scopes can truly grasp and understand. Thanks buddy for sharing your knowledge 😊 Artie sorry if I would of read your about info I would have known your name is Darren. Guess it pays to read. Now onto the other videos

@MechanicMindset 3 года назад

Thanks for the kind comment! No worries, enjoy the channel, let me know if you have any questions! 👍

@michaelrollins3979 2 года назад

Hey, really enjoy your videos. how do you set the sample rate on a hantek with the hantek software?

@MechanicMindset 2 года назад

Great question, I don’t think you can directly You can change the buffer length which will spread the maximum samples over more time giving less sample rate. I’m need to do more research on Hantek but I think that’s how it works. Thanks!

@Sugarkryptonite 6 месяцев назад

Loving the 2204A videos, Darren. The one thing that confused me was the s/div option in the software. I was always under the impression that that just changed the display output in the software itself so you could see more or less information depending on how big you want it on the screen (but the amount of information coming from the scope was the same depending on the sample rate chosen), but from the way you explained it, that actually changes how much information the scope provides to the PC as well? Like the s/div is directly linked to the sample rate?

@alfredprestwick7774 Год назад

I think you have still left some confusion, since at the beginning of the video you are referring to samples per second, but when you are making adjustments, the sample rate is per screen, not per second. If it was samples per second, the resolution would be the same regardless of the zoom factor of the time axis. Perhaps I don't explain it so well either, but I reckon you (Darren) know what I mean.

@MechanicMindset Год назад

Yes I see what you mean; I think I was trying to explain in its simplest form. There is an added layer to this too because the sample rate changes based on your time selection and maximum desired waveform buffer; all based on the oscilloscope memory. It can get quite deep 😅. It’s made somewhat simpler in Pico 7 with the option to prioritise sample rate or waveform buffer

@kevinpalmer7452 2 года назад

I have a pico scope 3423 from 2007 it’s 4 channel the sampling rates are 20MS/s for one channel and 5 MS/s if using 4 channels this was a top of their range back then I bought the full kit wasn’t cheap never really used it your video has peeked my interest got it out of the box last weekend had a look at some ignition waveforms still working great downloaded the pico 6 automotive software works with that ok but I guess for the price I should really get the 2204 far superior a big leap in 14years

@MechanicMindset 2 года назад

Awesome! I’ve not used that before. I’ve used the 4423, the first Automotive scope I think and that’s still good today. What’s the vertical resolution on yours? You might be interested in the training I’ve just launched 👍 www.mechanicmindset.com/diagnostic-coach

@kevinpalmer7452 2 года назад

@@MechanicMindset 12 bit resolution will have a look at your training I attended a pico training course in 2007 when I purchased the 3423 and to be honest it was to short and to intense plus there was guys there that were already using scopes went over my head to be honest.

@MechanicMindset 2 года назад

@@kevinpalmer7452 Cool, that’s good! 2204 is only 8bit. Might be worth hanging on to the one you have for a bit. Learn how to stretch its capability, then you will appreciate the upgrade and what the extra specs are buying you. I’m no salesman but the course I made explores all aspects of Pico 😂👍

@Z14kt12timandjes1 2 года назад

Excellent info! Thanks so much. You mentioned in the video sometimes you might take the car on a road test. Will the pico scope actually record data for a long period of time like that? I was thinking that it would record up to 32 frames and then start recording over itself. Are there any settings I need to make so that it will record for a long period of time? Sorry if my questions are kind of dumb. I'm still relatively new to this.

@MechanicMindset 2 года назад

No, great question! You can increase the time setting per division. So you could actually record for hours or even days. You can then zoom in after, but the quality does reduce over longer time, there are only so many samples that can be taken. Keep an eye out here, I have some PicoScope training online coming soon!

@Z14kt12timandjes1 2 года назад

@@MechanicMindset oh, that makes sense. Thank God for knowledgeable people like you helping beginners like me. You really explain things well.

@padraiggalvin2807 3 года назад

Hi. thanks for taking the time to explain this as ive always tryed to understand it. Just one question- When sample rate is increase a lot to say 100ms and you then get more information on the captures does this then reduce the number of frames you capture or overall time??

@MechanicMindset 3 года назад

Hi mate, sample rate doesn't affect the amount of screens that are recorded. But if you increase the time setting, you should probably increase sample rate too. it all depends on what you want to do really. If you want to zoom in, more than likely you will want to increase the sample rate

@MechanicMindset 3 года назад

Actually, my mistake in reading the sample rate could reduce the waveform buffer. Looks like it depends on which scope you have as to how it is affected 👍

@iankelly2110 3 года назад

thanks for sharing Darren people are charging 1000 euro hear in Ireland just for basic oscilloscope training

@MechanicMindset 3 года назад

Wow! How they provide tons of value! 👍

@iankelly2110 3 года назад

@@MechanicMindset I know its crazy people like to take advantage of guys tryin to train and become a better Mechanic or tech there is some great content from guys like yourself on youtube a lot of crap to . thanks again

@MechanicMindset 2 года назад

Our PicoScope Training Is Now Live! www.mechanicmindset.com/diagnostic-coach

@jjjda7441 3 года назад

Hi Darren, Pico software lets you decode a LIN signal as a measurement tool. Could you please deepen in that issue? Could be really helpful!!

@MechanicMindset 3 года назад

Hi, yeah I will have a look in to it. The serial decoding feature is quite simple to use. What is not so simple is obtaining the manufacturer information that can be used to decode that data in to information safe for humans 😂. I suppose that’s what the live data in diagnostic software helps us achieve. I’ll have a dig 👍

@alanw5879 3 года назад

Can you explain the resolution option, 8bit or 12, because they make a huge difference in the waveform . Thanks

@MechanicMindset 3 года назад

It’s on the list. I have found a great way to explain this too. Thanks for the content suggestion too 👍

@sampathkumar-bk1pl 3 года назад

Can u explain the setting in the laptop Like how we have to change time Nd voltage in pico scope

@MechanicMindset 3 года назад

Hi! Like this? ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-nmGubcuzbtU.html

@hichamsaid9472 3 года назад

Thank you sir, what do you think about an automotive oscilloscope that has 10 Mz bandwidth, 40 Ms/s sample rate to analyse can bus fast canbus, and all car's sensors. It's AVL DiTEST SCOPE 8400.

@MechanicMindset 3 года назад

I know the scope but I have never used it before. it should be ok - AVL make some great tools

@hichamsaid9472 3 года назад

@@MechanicMindset THANKS

@AutoDiag_ 3 года назад

Can you use with oscilloscope amp clamp like unit210e Or u need one with bnc?

@MechanicMindset 3 года назад

Hi, you need an amp clamp that outputs a voltage signal. BNC is best, but you can get a 4mm/banana to BNC converter to use other types. The one you mention 210e doesn’t look like the correct type. Check out my links for cheap amp clamps that work 👍

@leftyspinn 3 года назад

Is it worth purchasing the 2205a for higher sample and mhz?

@MechanicMindset 3 года назад

Potentially yes, if you wanted to do a lot of zooming on longer recordings. Spend a little more again and you can get 2405 with 4 channels plus the extra samples 👍

@kyoadam1593 3 года назад

Sample rate vs/and Bits?

@MechanicMindset 3 года назад

So the ‘bits’ refer to the scopes ability to rise and create a smooth line (to replicate an analogue signal). Low bit rate scopes will have steps in the wave form. Hope that helps 👍

@robsteinert7375 3 года назад

First of all great explanation 👍 Could you please tell me if it's worth buying the 2205A which is 200 msps over the 2204A? Do you think it's worth the extra money?

@MechanicMindset 3 года назад

Hi, if you want to do lots of captures at a higher time (I.e 200ms/div) and then zoom in then yes - it would be a bit better. ‘Real time’, for example a CAN capture at 50us/div, there no real difference. If you want to spend a bit more, go for 2405A, 4 channels and specs like 4425A! 👍

@robsteinert7375 3 года назад

@@MechanicMindset That's a good point. Maybe spoil myself and get a 4 channel. Thanks for the prompt reply, appreciated.

@MechanicMindset 3 года назад

You’re welcome!

@jamesbarratt593 2 года назад

Tell me mate did you say you have a seek thermal imaging camera for your phone? Was wondering which to get. Seek or Flir. Thought you might know.

@MechanicMindset 2 года назад

Hi mate. I got Seek. Although you can get a Caterpillar phone with the Flir built in!

@jamesbarratt593 2 года назад

@@MechanicMindset whats that

@MechanicMindset 2 года назад

@@jamesbarratt593 Google for it. Caterpillar (like CAT the diggers) tough smart phone

@jamesbarratt593 2 года назад

@@MechanicMindset the cat phone. No idea what it is but I do know I am waiting for Elon Musks pi phone. Signal from above crystal clear and not having to pay THREE mobile for their pony service. Thats a good thing. Signals not flying through us is also good. Never been a believer of radio masts

@steveo782812 3 года назад

Does this tie into the buffer? I was always under the assumption that higher sample rates used more of the buffer, thus less screen recordings you could get. Is that correct?

@MechanicMindset 3 года назад

I think there is a relationship between time base and sample rate. The scope automatically enters a slow sample mode over 200ms (this can be changed in preferences). The buffer can actually be increased to 255!

@MechanicMindset 3 года назад

And yes, it does affect how many waveform buffers are stored. Looks like it depends on the scope 👍

@manueladams5327 10 месяцев назад

Where can i buy a Mechanic Mindset Beanie?

@pl5882 3 года назад

I see that there are several versions of the 2000 series Pico. What is the difference automotively speaking?

@MechanicMindset 3 года назад

The main difference is an increased frequency & sample rate plus the option for 4 channels. Higher sample rate is better - this 2204A lacks clarity for certain tests but is great for most. Hope that helps

@pl5882 3 года назад

@@MechanicMindset What I meant was what is the purpose of having a different frequency? I see there are 5 different frequencies you can choose from. I’m going to pick up the one from your affiliate link. Great channel you have. Thanks!

@MechanicMindset 3 года назад

@@pl5882 Ah, thanks for using the links 👍. The Pico Automotive kit is 20Mhz and 400MS/s. I reckon the 2405A looks like the Best Buy. 4 channels. 25Mhz. 500MS/s. Not sure if it is on Amazon though

@jamesbarratt593 2 года назад

Mate I want to know something. Injectors voltage diesel renault captur when ignition is on engine off. Im reading 4.7 volts both wires. Cranking im still reading 4.7 on both wires. I thought should be 12v and cranking ground side 0 volts. Should i get 4.7 or 12v?

@gfbemc0256 Год назад

Sounds like you are measuring voltage drop. Can you send a sketch or illustration of your probe setup?

@jamesbarratt593 Год назад

@@gfbemc0256 No I was reading correct. Written on the body it said 4.7 volts.

@gfbemc0256 Год назад

@@jamesbarratt593 that’s very interesting. I am assuming they are direct injectors operating at high pressure?

@tonyfremont 3 года назад

Have you gotten your 2204 to work with the automotive version of the pc software?

@MechanicMindset 3 года назад

Hi, yes I have a video to show how although I don’t use it personally. For me it’s the same as Pico 6. You can import the probes if you wish to. Thanks for watching!

@tonyfremont 3 года назад

@@MechanicMindset okay, I'll look for it. I know there was one video showing how to get it to work with non "automotive" scopes, but as I recall, it seemed like something that likely wouldn't work long before pico fixed things. I saw you measure degrees, that's a big part of what I'd want. If it can make the markers for every 90 degrees, that would be do fine. Also, if you can create custom probes, that pretty much takes care of the rest.

@MechanicMindset 3 года назад

@@tonyfremont Ah ok, you can measure degrees on the normal Pico software; no need for the Automotive version. Drag from the bottom right corner. You can download it and try it for free in demo mode 👍

@tonyfremont 3 года назад

@@MechanicMindset yeah, I was surprised when you showed the degrees already calculated. I was expecting you to start explaining the math for doing it by hand.

@saibabupodala6297 3 года назад

I'm waiting for u r New videos, in laptop display one option is there measurement we go that option it's tell some options like sensor, ignition, Diesel injector,cam,and Crank please kindly explain

@MechanicMindset 3 года назад

Sorry I can’t make more! For your question, I think what you refer are ‘preset measurements’. It will set up the time & voltage for that certain component. It is a nice idea, I prefer to choose my own settings 👍

@saibabupodala6297 3 года назад

@@MechanicMindsetok bro thank you...

@georgebell3964 Год назад

👍

@MechanicMindset 3 года назад

Check out this video for a review on the PicoScope 2204A! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-1LBKtlpCj_4.html

@curioussand1339 3 года назад

7:50 I guess you mean lowering the sampling rate will help taking longer recordings? The higher the sampling rate the more data is created.

@MechanicMindset 3 года назад

Hi, sorry if it wasn’t clear. If you increase the sample rate, you will get more clarity when zooming in over longer recordings. If it is lower, you will get the ‘triangles’

@mike-yp1uk 11 месяцев назад

Snap on zues is 6 million samples and that pales in comparison to pico. It ok but not a clear pic

@MechanicMindset 11 месяцев назад

The memory spec also plays a part; it determines how many samples can be displayed. They are usually fine at fast time scales, but start flagging when you want a lot of time on the screen ie 10 seconds

@mike-yp1uk 11 месяцев назад

I sometimes watch a video 2 or three times and I usually pick up more info this is one of those video. Basic as is maybe to some but very informative to me who never understood it's value.

@MechanicMindset 11 месяцев назад

@@mike-yp1uk It’s in the basics where masters are made 👌

@dasouth1978 3 года назад

6:40 200 miliseconds is 0.2 seconds & not 2 seconds.. Nobody spotted this after a week?

@MechanicMindset 3 года назад

2 seconds on the whole page. 200ms/div x10 divisions = 2 seconds 👍

@dasouth1978 3 года назад

@@MechanicMindset so the samplke rate is per screen & not division?

@MechanicMindset 3 года назад

@@dasouth1978 The time setting is per division. So when we set it to 200ms, that how much time is represented in each square, 10 squares on the screen left to right, so we get 2 seconds of data on the whole screen. Set it to 100ms, we get 1 second. The sample rate is separate from the time setting per division. It simply defines how many samples per second. Hope that helps