We bought something similar to this for the workshop; especially useful for checking ABS sensors. It's easy to use, even for the Aussie apprentice. Single shot, spin the wheel and you can instantly tell whether it's the sensor or chipped or broken tone ring. Brilliant; paid for itself within the month. Also if it's run over, no great expense. If only people would remember to recharge it AND put it back.
A pocket scope shootout video would be great. I'd love to see how the available pocket scopes, both premium and budget, stack up against each other. And thanks for the very informative video on this pocket scope with the tear down explanation of the AFE problem designed into this one. (Not to mention the issues with getting 500Msps out of any ADC and into any uC!)
This is the 4th under $200 hand held ("small") scope I have purchased, and for my work under 30 to 40 MHz, it does a nice job. If you do the obligatory "divide by 3" on the specs for the Chinese claims, it works well within the "calculated" specs. In other words, for an old Ham (as in in Geezer over 70) doing simple work on HF gear (2 to 30 MHz) it's the cat's meow.
20 Mhz is enough for most Arduino projects. The highest frequency the Arduino (Uno / Nano / Pro mini) can output is 980 Hz, so even a 5 Mhz scope would be satisfactory.
I can think of a some good uses for this device despite its limitations. The biggest one is for field use by clumsy people who can't be trusted not to break the Fluke scopemeter but that still need an oscilloscope. This also could include classroom use, where people tend to do stupid things. In both cases the required bandwidth would probably be well below 10MHz for basic measurements. Another place this would be potentially useful would be when working with things like motor drive systems, where an ungrounded oscilloscope is required, though I don't know if I trust their statements on the voltages it can withstand. That being said, second-hand equipment from a known good brand may be a better choice.
I use it to look at analogue synth circuits and their behaviour. That envelopes, filters, PWM work like they should. Only visually though. Operating on up to 20 khz range audio range strictly. It does its job fine for that.
To be fair, if it can't handle audio frequency work... XD Given the nature of what an oscilloscope actually is, any modern PC innately can implement a scope entirely in software through the audio hardware. since that's typically 192khz ADC with in some cases 32 bit sampling and an inordinate amount of sample memory, it's a pretty interesting improvised method for low frequency work. For similar reasons a mobile phone (if it still has analogue inputs) might be coaxed into doing similar tasks... Of course, the reliability of this would depend on the frequency response, and there's stricter voltage limitations (probably requires external circuitry to protect the audio inputs) But at the end of the day... For low enough frequencies... XD
i have one, use it all the time for a lot of basic use mainly in situations where i want to test for the existence of a signal rather than much more detail on it eg fuel injectors firing , mosfets triggering, serial output actually coming out of a pin etc stuff like that to me and my limited budget it's a gem for what i want, would i try and use it to replace a high end scope ... no way
I don't blame you. Budget is the biggest restriction on life itself. I have a MiniDSO (from e-design I believe?) 4 channel, 80Vpp, 1 output 10hz-8Mhz, 1kSa/s - 72MSa/S. I would much rather have a bench top as I am still learning. (And knobs and dials work better for me, and look cooler) but budget... The Vpp really leaves me out of my usual field of 3ph480,wye and delta's.(just got my new 3ph power meter!) Would be nice to have something more portable* that was tuned to 10-400Hz.. *My mini dso is so handheld that it's fragile, and has to be plugged into power to be reliable. The "levers" also click like left/right mouse clicks.
@@jamesharrell4360 of course on a $70 analyzer you get lots of limitations (including errors) but you are forgetting about one KEY advantage here: portability; this is a MINIATURE scope for gods sake, this product was Sci-Fi about 30 years ago! it's like complaining about your $300 smartphone not taking the same quality pictures as your huge and bulky pro $3000 Nikon; as Chris Bate stated so well, for DIY projects and hackers on the go this $70 chinese analyzer is a good compromise favoring portability and autonomy; of course you only are going to check if some signal exists around some values; you arent going to exactly measure anything on this, not only because of quality components restrictions but also for tiny display resolution that makes it physically impossible to get accuracy
Ah Ha. A comment that is well considered and accurate; almost a first for RUclips comments - well not so in the case of EEVblog which doesn't attract many idiots. I also do woodwork where it is a case of 'horses for courses' and not all my tools are expensive. You are using this gadget for, it seems to me, precisely the purpose for which it was designed.
I'm with you. I bought one of these even after watching this video. I do have a 100 MHz Hantek and I do have an analog 50 MHz Tektronics... but my work in industrial automation frequently takes me to factory floors where having a means to look at signals 10 whole KHz and below is a huge time saver. It fits nicely with my bank account and in my laptop case.
@@ZaPpaul would this be ideal for say automotive 12volt signal testing. For like oxygen sensors ignition systems etc? Mainly just for viewing wave forms to see intermittent faults. Or a similarly cheap(well more $ than this) scope that i could use for watching mostly analog some digital wave forms
For the cheapie scopes that all seem exaggerate bandwidth (or conflate real or imagined sample rate with it), however, you get a lot more performance out of this one with its 2 to 5 times exaggeration versus the DSO211, DSO212, and DSO213 claiming 200 KHz, 1 MHz, and 15 MHz respectively with a similar exaggeration. And those cost from about $65 to $210. So, the 5012 is easily the best value (if you just must have one of the "mini" scopes) if bandwidth is important.
I love Dave's video's, you can bump the play back speed up 2x and he is still fully intelligible, saves me a lot of time, Thanks for the excellent info Dave 👍
My dad bought me a smaller LCD scope (pretty sure it's not 100 MHz, but it was only around 25 USD) and I was impressed that it was actually useful. I'd have killed to have something like that when I was Sagan's age. Back then, my neighbor had an old Tektronix 500 series tube scope because that's all he could afford.
It might not be a super high end frontend, but I do think it is very beautifully engineered with the price constraints. They gotta cut corners somewhere, and for the amount of components you get quite some performance. Outperforms a lot of (at the time very expensive) old scopes, quite amazing that you can get this for this price nowadays. Anyway, I do think it would make a nice handy 'through in the toolbag' kind of scope to use in the field, or when working on things that cannot be transported easily into a lab (for example vehicles).
I just bought one despite the limitations. I have a bench scope (an older Siglent) that I use when precision matters. This is just for when I’m away from my bench and need a rough idea of what’s going on. It seems to me that as long as you know the limitations and don’t expect more of this device than it’s capable of, it should be fine for what it does. ¯\_(ツ)_/¯
Love your channel, however I do have to say it's a $70 portable oscilloscope. At $70 I wouldn't expect it to be precise but might be useful for timing or checking for a digital signal. Could be nice to have in the tool bag.
They most likely running the adc directly on dma channels on that arm. so sampling directly to sram. If they set the clock source from a timer they sure are able to hit 125mhz and use it as an dma-transfer trigger to boot.
@@EEVblog A comparator with a narrow sample time . The trigger point is ramped, so on a repetitive wave form the whole wave form can be displayed. This plug in would do DC to 1 Ghz bee.mif.pg.gda.pl/ciasteczkowypotwor/Tek/7s14%20.pdf also, Sampling Oscilloscope Circuits w140.com/tekwiki/images/e/e0/062-1172-00.pdf
A reasonably accurate display of a signal in the Khz or low Mhz range, I bet that is what most sane people would expect and need from a scope of this price.
Pffffsh, for 70eu I'd buy that with 10Mhz bandwidth easily, and be happy with that! Have one of those super cheapy ones in the toolbox, just for those cases when you need to see if I2C look about right, or if it even there.
I don't think a thumbs down is warranted here...100Mhz? no but it beats the shit out of a vellman pocket scope at $150. I don't know if they even sell those anymore, but that was my first scope...I used it to troubleshoot all kinds of automotive issues (mainly ignition) and would have KILLED for a cheapo scope like you just reviewed.
@@EEVblog Fair enough, but I still believe that it could be useful despite it's exaggerated specs. Any scope is better than no scope and it sure beats lugging a CRO around if you need portability.
I got one of these to play with as I am reviewing a number of low cost scopes to advise others for model railroad purposes. (Testing most of the DSOxxx tiny ones and larger Hantek ones like their 2C42 which I think is money MUCH better spent than for any of the "mini" scopes.) The one I got was marketed by Yeapook as the ADS5012H and seems identical. It is a somewhat different animal than the DSOxxx scopes which have ludicrously exaggerated bandwidth claims. The 5012 peak to peak voltage diminishes quite a bit once you get above 20 MHz, but it can still show a semi respectable sine wave to well above 50 MHz (although slightly flat topping above that). Of course, a square wave at those frequencies looks extremely trapezoidal. I found one of the most interesting features being that a button is provided for pretty much each of the day to day operations you do. Even a 1X/10X button is there which is something buried in a menu on every other scope I have seen. By far the easiest scope for a beginner to use. It comes with a 1X/10X probe but like most cheap probes with cheap scopes, it introduces voltage error and has no means for compensation. You need to use a 10X probe for max bandwidth so if accuracy is important, you may have to buy a scope probe that costs as much as the scope. I must say that after flailing at a number of the other mini-scopes and figuring out the trick(s) to access all the menu choices, this 5012 scope was like a breath of fresh air. It even came with a very nice semi hard shell case with room for accessories. Finally, the case has the slogan "A hardy tool makes a hardman". On the Amazon site, the slogan is "A Handy Tool Makes a Handyman".
@@leocurious9919 Well, if you're just checking for clipping on say a 1 khz sinewave, it'll do the trick just fine. You don't need to read any measurements for that, you just need to see the waveform. It should be more than enough to handle audio signals since they're low frequency.
It's possible that the chip may be capturing the samples via DMA to the GPIO. I haven't looked at the frequency / signal spec of the GPIO for the chip, but the block diagram has the DMAC, SRAM, and GPIO on the same AHB bus which can run at 168 MHz. It also has two DMACs. The details of the matrix didn't appear to be in the datasheet (it may be a multi-lane cross bar), but it is probably 32-bits and one full bus at least. That means that a single GPIO DMA transfer could occur at 168 MHz, reading all 32-bits simultaneously (16-bits of sample data and 16-bits of garbage). And since the two 8-bit samples are contiguous in time, it doesn't have to do any weird repacking. I would be more interested in how they are doing the triggering, especially since it looks like the clocks are from DMA transfers?
With one channel ? No. There are 4 channel oscis for 135 dollar but the probe has a small Wifi N Adapter and needs new probes, so that is the only downside. It is enough for car electric, I even probed CAN with it to find problems in the data bus.
I have one of those DSO Shell clones as a toy and it sometimes comes in handy to do some quick measurement at a weird location where you don't want to lug the scope. However, in my experience the big limitation in a lot of applications is that it does not have external trigger or 2-channel operation (where I could trigger from one channel and view the other). This one does not have it either... apparently not a use case the developers of these gadgets envision.
It's easy to look down one's nose at a piece of kit like this in this day and age .. but I can see this as a relatively useful little gadget for simple breadboard play and debugging. Sure, not aligning an MRI machine, but even for "simple" service gigs .. is "this" particular output at least varying it's PWM signal? Would be a great auto service industry tool, the environment typically too harsh to risk the $1600 Fluke s'meter. Seventy bucks is a barely few hours worth of pints sorrow if you drop the little thing in a bucket of coolant. Not going to replace the 1GHz Tek mainframe, but I wouldn't be embarrassed to have one. Spent quite a few years with a "tool" fashioned from 5x7 LED matrices, LM3914's and 4017's as a rudimentary "scope" working on cars. I would say that this thing has it's place as an enhanced "go/no go" bit of test gear. Hell. remember what you paid for your first logic probe back in 1978??
I can see a purpose for this as a teacher on a limeted budget who cant afford lost if expensive scopes who purely needs to show a student wave forms and a practical side of electronics as a good option
lol. Reminds me of an article from an electronics magazine about 20 years ago which gave a design for building an oscilloscope into a gameboy cartridge. I guess that would be an amusing comparison - is this thing better, or worse than a hobbyist magazine project to turn a gameboy into an oscilloscope? I know I have the design somewhere... I wouldn't be surprised if that works better, simply because hobbyists are less concerned with meeting a price point, so it comes down to the design skills of whoever put that circuit together. Of course, a Gameboy only has a 4 mhz z80 processor, but whether that's an issue or not depends on how the oscilloscope circuitry is designed and how it's interfacing with the gameboy...
Since the Gameboy just hands addressing to the cartridge, you could do some really stupid and powerful stuff. You could just make the Gameboy CPU run a simple thing that blits cart memory onto the display, and have a 1 GHz ARM SoC in the cart do all the heavy lifting.
many thank sir for the detailed analysis of this mini oscilloscope, i have ordered one of these before i see your review and i do not regret it, for its money is fine, I want to use it for audio purposes and hf frequencies, i know is a cheap instrument and i know i should not expect much of it but the way i wish to use it is fine, anyway what you pay is what you get, for more professional instrument we have to put our hand deeper in out pocket,,, otherwise, find the cheap solution ...
Well, it's a bit unfair to contrast a Rolls Royce with a Kia because if all you ever drive is your uncle's Royce you are going to think the Kia is crap. Likewise with this $70 scope. I used to build a lot of Ham band CW transmitters and used a BK Precision 30 Khz 1474 scope that was probably built in the mid to late 70s. All I needed the scope for was to see that I had indeed a signal, a rough idea of the watts the transmitter was putting out and an ability to look to see if the band pass filter was attenuating 2nd harmonic. I was pretty limited with the 30 KHz scope I have and it cost more than $70. So while the scope you tested will not stand close to an over a $1000 scope it still would probably suit my needs when constructing simple transmitters and a hobbyist can't really justify an expensive scope from the perspective that repair jobs will pay for it over time. So, yes, I'd give it a thumb up for its price range when one uses it within its limits.
This is a good step up from a DSO138 if you're not ready or don't have the $$ for a benchtop. Definitely not for SRS BSNS but for a hobbyist doing things with 555s, Arduino, etc, it gets the job done
A simple low cost scope like this works fine for R/C where you just need to look at low frequency signals to troubleshoot and a $1000 scope would be overkill.
I have one of these for repairing old computers, to see digital signals not higher than 50Mhz works quite well, when I need to see something really accurate then I use my old scope, but for saving space on the table is quite good. Also, mine doesn't has the coupling problem, maybe your unit is deffective, did you bought it on the FINSR store or in other one? I know they resell their "faulty" units to other stores and they sell it cheaper.
@@ivanbiasutti4567 For digital, sure, I get good signal readings up to 50Mhz (clock and bus transfers), for analog... not really sure as I haven't tested it, I only have an analog signal generator up to 10Mhz and with these it has no problem at all.
Glad you were able to scope it out for us. Those early oddities signaled the trouble ahead. If the original designer was a woman, I'd like to meter. I may have only a single shot at connecting with her but I'd make the most of it. Well, need to hop on my cycle as I do with great frequency. Take care!
iv seen others reviewing this meter & none of them put it through it's pace's like you did. I was going to get one but iv changed my mind now.. so thank you Dave for opening my eyes to the obvious flaws of this scope IF THEY UPGRADE THE SOFTWARE ILL CONSIDER BUYING UNTIL THEN ILL HOLD OUT FOR SOMETHING BETTER.. but then again if this models price drops "A LOT" ill get one!! but until then i wont be holding my breath.....
Depends what you need it for. I have a Siglent SDS 1104X-E, and to me it's a pricy hi end equipment. I wouldn't feel comfortable using it in a field where something may happen to it mechanically, or some unknown signal may fry it. The $70 scope would be PERFECT for such use.
I’m a mechanic spent thousands of bucks buying pico. It’s an overkill to me , portable and cheap device like this is what most of us need. Hope fluke might come up with device like this.
Thanks for the review, I was looking into buying one but probably won't after watching this. It's a shame because as you mentioned there is a lot of untapped potential in this product. If the analog front end could be made more robust and if it came with better firmware, it would make a great scope in this price range. 20-40Mhz would be good enough for most hobby electronics use so I don't think that's a problem.
there is the model for an example: hantek 2C42/72 or 2D42/72..... its s scope, function generator and a multimeter all in one... --42 for 42mhz or --72 for 72mhz...
This device is: Built out of components worth at most $20. Smaller than your phone. WAY more snappier than most benchtop scopes. All I hear is laughter and the word "dissapointing". Whoa. Looking at it as a prototype or proof of concept, the potential is rather amazing IMO.
My question after watching this is: what is the cheapest you can make a 100Mhz scope that will "pass the mustard" on all the hardware tests? Is this a component cost limitation, or is it a lack of NRE/design excellence/design validation?
As you've seen in this case it's the limitation of the microcontroller that undermines the claims. An FPGA capable of the signal processing can cost as much as this scope alone. And once you're using an FPGA or a microprocessor you'll likely need multiple power supplies, 4 layer PCB, etc. all adding up to a cost which lands in a gray area, where it's too expensive for hobbyist but hard to justify over for example a benchtop 2 channel scope.
There's still a giant gaping hole in the scope market for people who can't possibly justify shelling out a few hundred quid for an entry-level "proper" scope (and are not in the mood of guessing what condition the CRT of an antediluvian, used one is in) yet need to see the shape of things happening occasionally - and this thing is coming awfully close to actually filling that hole. With a proper 100MHz bandwidth, it *would* fill it too. As for actual value measurements, ain't nobody (except Dave, natch) got the kind of money that would pay for a scope that has the precision to actually measure anything numerically - because 8-bit entry level scopes are sure as heck NOT doing that particularly well either. Measuring precisely is just not the scope's job in any hobbyist's lab.
Attila Asztalos Yeah, this would fill the hole for me either if it truly did the bandwidth it claimed, or was a tenner cheaper. I could live with a 0.2 volt inaccuracy.
It’s possible to do this stuff in this form factor and for that price, it just requires an experienced designer who can do some lateral thinking. I’m sure this SOC has at least a 32-bit RAM, so using DMA it should be able to transfer 4 bytes each cycle or two. Say it can push 200MBytes/s at 100MHz clock. It would need an external latch and a little ring counter to latch bytes 1-4 in order. Not expensive at all. So this ADC pushed to do 100MSPS each (I’m sure they use the lowest speed grade though so it will do way worse than a good 8bit one would) gives a solid 200Msps. The clock phasing needs a varicap and PWM output from the MCU to adjust for minimal distortion. And then the front end could be done better too, perhaps with internal calibration path and you could use transistor amplifiers and not opamps to get good bandwidth. It’s 8 bits and a crappy ADC, so even the cheapest discrete transistor signal chain wouldn’t make things any worse at all. So yeah, I believe it could be done better for the same price at similar volume, assuming the engineering time was free (such a design itself would be expensive since there aren’t millions of people who could pull it off the world over).
@@absurdengineering I've heard of an interesting technique here: hackaday.io/project/10119-sdramthingzero-133mss-32-bit-logic-analyzer It's a bit like the old trick of using an EEPROM as an FSM, except you use a DRAM chip as an FSM to drive the address and control lines of another DRAM chip, with its data lines connnected to the ADC outputs. As you mention the clock generation is something that needs careful consideration. For a 100MSP ADC you would want < 2ps RMS jitter in the clock. I think this could be done relatively cost effectively by using an LVDS clock generating chip, since they already have the two-phase outputs with low phase noise and jitter. A huge problem with this device is that it uses the mcu PLL to generate the sample clock, and these typically have poor characteristics.
It will skip a 100 Mhz wave with a frequency meter every 10 waves and then one mixed wave a little phased continued as a small phase offset phase to measure at the representative phase of the new wave in the 25 MHz range. In order for this to be possible, a synthesized mixing and average wave at 8 transistor R-C gates is quenched and then sampled much slower. This is set to a 25 Mhz (100 Msps) clocked AD converter, although at the correct phase beginning of the display. However, the virtual image is displayed in the 25 MHz mode of the second AD converter. The representation of the output is then synchronized a second time, with the input both synonymous and mixed to paint smaller display errors .-> Very inaccurate device but you can make for just € 70 very rough wave analysis with digital smooth shit. However, a precise sequence analysis is installed. At least it works right up to 1 MHz. The preamp is, however, a little less but just enough at 50 mV. Also missing is a switchable 50 hz filter. Nevertheless, it is practical for very small applications and budgets. You could also install a 500 Mhz AD converter (for plus 20 €) accurate and mix up to 1 ghz hereby roughly, with an frequency divider oft 10 ghz (well this with 17 €, and fastest 7x transistors only manage to 10 ghz, add 7 € ) A little unfair the comparison, but some are looking since 20 J such Oszi for the vest pocket, but with higher frequency. The Umts-Aera did not change the most consumer limit of normal ozilloscopes over 30 Mhz. The mixing methode was 20 years ago discribed in some science journals, I believe to remember. An 10 Ghz mixed vest pocket would be true timely.
If they hadn't made the claims beyond what they really did, it would be not a bad deal. The analog scaling could be a lot better without a lot more complexity. It would likely involve some 2% capacitors to get the gain flat enough to be an honest 3db at 20MHz.
I have never (in the decade-plus I kept my eye on them) seen those guys sell anything that could have been called affordable, or worth its pricetag for that matter. The one they sell for well-no-not-really-a-hundred-bucks is literally a toy (even compared to this one) with its 10MHz bandwidth, and the one that is actually supposed to do 100MHz costs the price of not one but TWO brand new entry level "proper scopes".
Horses for courses. I'm very impressed by the price. Need 2 channels though. Seems way more useful than the Chinese 1MHz AVR-based things. Pushing it for crappy audio there. My main one now is a ''Bitscope' thing - 100MHz, 2 analog channels, maybe $250 dinky ADC box to plug into laptop (NSW company, btw). I thought I was going to need some logic analysis, has that in spades. Still haven't used those bits. The software is a bit weak, unintuitive, but has most things you'd want. Only really used on
Plenty of good work has been done using 10Mhz scopes throughout electronic history. China engineers should put less effort into making the fastest pocket scope and more into making the most usable pocket scope, a true 10 or 20MHz scope, mobile-tablet size with all the usual functions and an actually good usable interface (DSO Quad/Nano/203/whatever ... argh, I hate the thing just for the stupid interface confusion!) for $100-150... it seems like it should be possible.
I have a DSO 068, at first I didn't like it much, but as the time goes by I getting to like it more and more (battery powered, don't need to worry about ground loop, etc.). The biggest advantage it has human inerface, I don't care if a scope has 10Gs/s if I can't use it effectively because it has no knobs just buttons, or even worse only touch interface.
Is the $70 price point reasonable for a 20MHz portable oscilloscope? If FNIRSI were selling this _as_ a 20MHz scope, and not trying to pass it off as something more capable than it is, would it be worth it?
Learning basic electronics. Have a few multi-meters. I'm researching "cheapie" less than $100 oscilloscopes. I read that the most important spec is bandwidth. I've noted that $40 to $100 scopes have severe bandwidth limitations ranging from 200K maybe up to ~1.0 MHz with reasonable (+/-5% ?) accuracy. I've noted this scope advertises 100 MHz bandwidth, but is reasonably accurate only below less than half that, maybe 20 to 30 MHz. I'm wondering if all the cheapies greatly exaggerate their specs like this. They call it "Chinese specs", I've learned. What I would like to know is 1) what type of testing can be done with reasonable accuracy with such low bandwidth scopes, and 2) what types of testing should be totally out of the question/avoided. I understand the guideline that a scope should have a bandwidth 5 times the frequency of the things being measured. My question deals with what types of circuits generate frequencies that are in this lower bandwidth range. My scope functionality question pertains to testing these kinds of circuits: Beginning hobbyist testing such as in Platt's Make: Electronics or Basic Arduino type systems. $100 is my absolute limit; preferring $40 to $80 range. This is just for a "toe in the water" "explore the basics of scopes" sort of thing. I know that if I spend "just a mere $200 more" I can get a "real scope." And no, don't want to mess with used or eBay. Here are 4 scopes in my price range, including this one: www.amazon.com/dp/B07QML4LJL/?coliid=I3UEZDO1F0D9V8&colid=3B04RKX85L5W0&psc=0&ref_=lv_ov_lig_dp_it www.amazon.com/dp/B07V6795WP/?coliid=I3IXRDY73S9RI5&colid=3B04RKX85L5W0&psc=1&ref_=lv_ov_lig_dp_it www.amazon.com/dp/B07XBL4BTL/?coliid=I31BECTM93K5LJ&colid=3B04RKX85L5W0&psc=1&ref_=lv_ov_lig_dp_it www.amazon.com/dp/B07TNPYLS5/?coliid=I1RS7IOEMH7PJ6&colid=3B04RKX85L5W0&psc=1&ref_=lv_ov_lig_dp_it
Of course theres the Hantek 2C42, which is a 2ch 40MHz bandwidth handheld scope with DMM, available in a 70MHz variant and optionally with a signal generator. Has a decent looking shielded analog front end, an FPGA for acquisition, etc, and has been getting good responses from both the eevblog forum and the electronics channel on freenode - and is $99. But then, I recommended it for review several months ago, even offered to send one in, and was met with "no way, i'm not wasting my time reviewing any cheapass chinese scopes" -_- i.imgur.com/EKq3XZK.jpg i.imgur.com/KlW6zD3.jpg Edit: Added Internals Images (if youtube will allow them)
DJ can you do a follow-up on the whiteboard and draw a schema showing the resist divider front-end, the capacitance problems/origins, then maybe block out how the rest works? Like front end to divider, then ADC/micro etc? And maybe compare to "proper" front end? Im interested in how they went about designing it at a low cost, but came a gutsa with certain decisions.
@@EEVblog yeah - its great when you break out the board and go into a bit more detail with some of these things. And voltage division/ratios through resistors is a base concept, so may be a nice hook for beginners to get into & understand. And to hear from you why, even though the division works, it didnt cut the mustard here freq wise. And maybe why this thing could never get it's advertised "banner" specs because of hardware/silicon choice? Cheers mate - love ya work.
Nicholas Anderson I was thinking the same thing but still watching this video. Had a 04 Camry with weird Transmissons issues, put a $40 pull a part ecu in it and it fixed it. I would have liked to view the solenoid duty cycle waveform to properly diagnose it.
That's what I'm using my DSO138 for. A 36 tooth timing wheel at 10,000rpm is only 6K Hz, and the DSO138 is fine to 10K. Maybe even 20K. It's nicer than my DSO130, but it's also costs a 4x more, so it's probably too expensive. I'm starting to get into injectors, so it would be better for me to have a 2ch so I can see the INJ opening and closing at the same time to work out my dead time.
I think something like a cheap USB scope ala Hantek would be better since you have deep sample memory. For example, hook up to the camshaft sensor, start recording, then go and crank the car over, then come back and stop the sampling and examine the results. I know you can do this with triggering but just a straight datalogging adds validation. Or checking out a suspect wheel speed sensor: hook it up, go for a drive, when you see something funny pull over and have a look. If you really want to get dee p into it you can import into sigrok for looking at CAN for example.
@@paulmoir4452 USB scopes are a bit of a pain IME, having to balance a laptop and a fairly bulky interface within the engine bay, with a running engine is not easy.
According to the specified input voltage levels you can probe mains voltages with this crap box and by looking the PCB it seems the USB connector is internally connected to the measuring circuits without required safety isolation.
In this case, the 50 ohm load is not necessary, because you are not measuring a power, so 50 ohm of the generator, with the 50 ohm load in parallel, is 25 ohm, 25/50, it is 0.5, 0, 5 times 0, 7 equals 0.35, exactly what you read on the final, I would say it keeps expectations !!!
The AD9288 can be and is commonly overclocked, the Rigol DS1052E bench scope used 3 of the 100MSPS variants, so a total of 6x 100MSPS when interleaved, to achieve their stated 1GSPS. Basically fine if the designer qualifies them to run at that. So i'd bet bucks this trashmeter is actually using the 40MSPS version, so a max of 80MSPS with interleaving without overclocking, and they're just overclocking the snot out of it, hence the terrible response at higher frequencies (tho im sure the front end doesnt help there :P)
#SayNOtoKILO the Nano is an amazing piece of kit. I should upgrade the firmware on mine as I need measurements up to a gigahertz. The Mini looks interesting although the inventor has been griping about the Chinese knock-offs. The Tiny appears to be Unobtanium now.
Still better than the vellerman unit i have ! I only use it for checking pwm rotary encoders and Hall effect units and that little scope would be ideal for that
Thx Dave for the rvw. It appears to be a 20 MHz scope that's being pushed to higher freqs or claimed to have higher bandwidth. It's a shame the Chinese feel the need to lie so badly. Maybe you'll do or say anything to get a meal when you're hungry. Again, Dave thx for the rvw and teardown.
Change the 100Mhz to 20Mhz and you have got a gem of a scope that becomes essential for your toolkit. I voted this video down as all this harping on it's supposed shortcomings missed the real reason that this scope is so useful.
Bei analogen Oszilloskopen scheint nur die mögliche Spannung zu entscheiden, wie schnell die mögliche Frequenz 1 GHz, 10 GHz, 100 GHz, zuletzt als normaler Trigger bei niederen Frequenzen. Das Problem ist die hohe und angepasste Impedanz und die Möglichkeit eines voll konzentrierten und gebündelten Strahls. Mit einem 100-MHz-Horizontal-Trigger erhalten Sie eine 100-MHz-Welle auf dem Bildschirm als vertikale Amplitude, wenn genügend Energie von der Kathode in Bezug auf die Ausrichtung und Ablenkung der Elektronen vorhanden ist. Die Bildbreite muss nur ausreichen, notfalls in Zeilen. Aber es scheint auch physikalische Grenzen zu geben, die durch die Platten des Oszilloskops verursacht werden, je nach der tatsächlichen Wellenlänge und der Streuung nach Wellen- und Kapazitätsdimensionen. Der Strahl wird nicht nur gebeugt, sondern auch gedehnt. Deshalb muss er wie eine harte Nadel sein vielleicht sogar von höheren Frequenzen umgeben, die von einem Bündler mit etwas wie einer kleinen Wolframbeschichtung im Inneren oder einer guten anderen Legierung erzeugt werden und die Streckung des Strahls verringern. Die elektrische Außenlinse sollte nicht versagen. Es ist je nach Konstruktion sehr schnell. Nur moderne Kinder glauben, dass es bei 50 Hz langsam ist. Es gibt spezielle Klystrons mit 500 GHz und mehr Transmission für harte Strahlen. Der Bildschirm ist nicht das Hauptthema. Aber das Auge ist sehr langsam. Daher ist ein zusätzlicher Bildschirmtrigger für Summationen erforderlich. Dann erhalten Sie den Vorläufer eines Bildschirmspeichers, verursacht durch natürliche Verzögerung der Pixel. Dies ist aber auch nichts anderes als ein Vollbildmischer mit höherer Frequenz direkt auf dem Bildschirm vollsummiert. Bei 90 ° seitlicher und vorderer Neigung können Sie zusätzliche Untersuchungen in physikalischer und elektronischer Form durchführen, wie eine "Sondenprobe einer Röhre", jedoch in "direkter präziser Mischumsetzung am Bildschirm" überwiegend visuell detektiert. Später wird mit A/D-Wandlern und innerhalb "trägen Halbleitern wie verrücht an dem Wellenverlauf spannungsmäßig herumgemessen. Nur dienen diese A/D-Wandler nur zum Nachmessen. Es fehlt vor allem eine realistische hochauflösende THz-Probe , deren Inhalt dann dann mit einem A/D-Wandler ausgemessen wird !
Get the hantek MSO5000D it has a logic analyzer and can be hacked up to 200MHZ. I ordered the DSO400C for the signal gen but they sent me the 5000 series which is $250 more by mistake. I am really happy with it for the price. They sent me the 200MHZ version so I didn´t need to hack it. today is 11.11 and there are huge discounts on aliexpress so you may even be able to find the 4 channel DSO4004C for that price. Which can also be hacked up to 250MHZ so get the lowest bandwidth and do the hack yourself. If you don´t need the signal generator you can get the other 4000 Series and save a couple bucks but I think it is worth it. Hantek manufactures the Volltcraft scopes and entry level scopes for a couple other companies.
I just checked the 4 Channel 4000B is only 290 Euros and the C is 309 Euros and the 2 channel is 178 Euros with the signal generator from the Hantek store on AliExpress. They don´t have all their other models listed right now for some reason but the 80MHZ MSO5000 usually costs 254 so have a look around on Aliexpress today and maybe you find a discount. You can also find their USB scopes for under 100 if cash is tight. I am really impressed with the scope for the price and if I ever have the money I will buy the MSO7000 they just released.
Of course this microcontroller can drive the ADC through timers or pwm or a similar interface at 100MHz. You don't drive it manually raising a gpio pin from the code anyway. Then ADC can store the whole captured buffer through DMA into the MCU memory which then process it later.
Good video overview, as allways. You are the one l can trust on electronic device overviews. It would be nice to have a few overviews of „thumbs up” handheld 1 and 2 channel oscilloscopes for easy „on field” signal testing. Two channel oscilloscope is a must for speed an position encoder testing, with possibility to have one channel on X and other channel on Y axis.
Neue Technologie: ein Vorproben Chip für eine THz-Sonde. Zur Zeit wird allerdings richtige Forschung nur wenig gefördert und weiterentwickelt. Andererseits sind sequenzielle analoge Wellenspeicher aus senkrecht aufgestellten Kapazitätsdioden im 500 Thz-Bereich mit einem horizontal querverlaufendem durchbohrten FET-Tunnel, (genauer durch einen FET wie ein gebohrter Thz-Kanal gehend und nur über Tunnel - Felder verbunden) als analoger Zwischenspeicher auch für genaue sequentielle Auswertungen im gehobenen Thz Bereich bis Exabereich präzise denkbar (natürlich ohne phasenverschiebenden Cluster-Mischer wie das einfache Taschengerät). Vieleicht produziert ja jemand einen solchen direkten Kapazitätsdioden- Seitenkanal- Chip mit um 90° horizontal ununterbrochen durchgehendem aufgebohrtem FET-Tunnel der als Thz-Frequenzsonde dient.(anstelle des Röhrenkanals) Dies wäre eine technologische Herausforderung und würde ganz andere Welten eröffnen. Bei minimalem Speicherbereich, je nach gewählter Tor-Zeit und einem analogem Entwicklungs-Plus auf dem Sonden -Chip . Quasi ein analoger Thz -HF-Wellenspeicher mit ausreichender Wellen-Laufstrecke digital abtastbar im Vakuum. Die Kapazitätsdiode kann dann mit einem AD-Wandler langsam bei aufgereihter Bedarfsstrecke im Wellenverlauf abgetastet werden. Der Speicherbereich würde hierdurch zurückgehen, da direkt abtastbar. Über einen schnellen Frequenzteiler muß allerdings die Torzeit oder das Samplevolumen/Zeit trotzdem mehr oder minder getaktet werden. Der Kanal könnte auf verschiedene Resonanzen getrimmt werden. Aber auch ein Lichtkanal könnte zur Untersuchung des Korpuskulierungsgrades des Lichtes in einem modifizierten Modell untersucht werden. Und sogar ein filterbares Spektroskop aufgebaut werden, welches bis zum Spaltexperiment geht mit Talbot-Auswertung, bis in den oberen Lichtwellenbereich. Vieleicht gibt es diesen irgendwann für jedermann und sogar im Westentaschenformat für präzise Physik.
I recognize the OS on that thing. The hardware on my pocket DSO is janky AF. I like that this one has Up, down, left, right buttons! Regardless, my Rigol kicks it’s ass. 😆
I bought a few years ago a mini oscilloscope named ''Mini DSO'' on ebay. It looks quite similar to a mp3 player and it seems to work better than this one! I can _relatively safely_ measure mains noise with it, with a little transfo coming from a 600V electric panel pilot light with integrated 600V-24V transformer.
Looks like the 100MHz is aliasing with the sample rate. Probably occurs on multiples of that. Also in normal tigger, I wonder if it would be stable if you scroll to the left side of the waveform (the first cycle of the trigger). For the price, it works pretty well.
Thanks, Dave! I was close to buy it, your video right in time to be aware to buy it. Would have been make some things easier. No problems with ground/grid isolation, portable,...
Im EEVBlog wird eine 100 Mhz Welle mit einem Frequenzmesser alle 10 Wellen übersprungen und dann eine Mischwelle einen kleinen Schritt phaseversetzt weitergesetzt um an der stellvertretenden Phasenstelle der neuen Welle im 25 Mhz Bereich zu messen. Damit dies möglich ist wird quasi eine synthetisierte Misch und Durchschnittswelle an 7 Transistor (R)-C Gliedern verlangsamt (und zeitlich phasenversetzt wie bei einem Sharp-Rechner) zwischengespeichert und dann viel langsamer abgetastet. Dies wird mir einem, 100 Mhz getaktetem AD-Wandler zwar an den richtigen Phasenanfang der Anzeige gesetzt. Das virtuelle Abbild wird aber im 25 Mhz-Modus des zweiten AD-Wandlers dargestellt. Die Darstellung des Ausgangs wird dann noch ein zweites mal mit dem Eingang synchronisiert und analog vermischt um kleinere Darstellungsfehler zu übermalen.-> Sehr ungenaues Gerät aber man kann für knapp 70 € sehr grobe Wellenanalysen glatt dargestellt vornehmen. Eine präzise Sequenzanalyse ist allerdings verbaut.Schon ein bisschen Schmu , aber trotzdem praktisch. Wenigstens arbeitet es bis 1 MHz präzise bis 10 Mhz noch glatt darstellend, bis 100 Mhz noch grob analytisch. Der Vorverstärker ist allerdings mikrig aber gerade noch ausreichend bei 50 mV. Dies ärgert etwas, weil ich das Gerät nicht mit einem andern Rückkopplungswiderstand auflöten möchte. Ebenso fehlt ein zuschaltbarer 50 hz-Filter. Trotzdem praktisch für Kleinstanwendungen und Geldbeutel. Man könnte auch einen 500mhz AD-Wandler einbauen (für plus 17 € ) als saubere Lösung und bis 10 ghz hiermit grob analog-halbdigital mischen. (gut die schnellsten noch preiswerten 7 Transistoren bis 10 ghz fehlen noch. Summe: weitere 7 Euro) Ein bisschen unfair der Vergleich, allerdings suchen manche seit 20 J ein solches Oszi für die Westentasche. Das Gerät hat natürlich eine relativistische Macke eines Vermischers. Für ganz simple Alltags Messungen allerdings noch anwendbar.10 Ghz - Mess- Mischer würden dem Zeitgeist wieder aufschließen. Bei rein wissentschaftlichen Anwendungen wird hier natürlich alles physikalisch extrem unüberschaubar und grauenvoll bei dieser plumpen Transistorfraktionierung auf die einzelnen "wenigen kleinen HF-Transistoren" (hier sind theoretisch sogar die im Ghz- reagiblen Monitor Analog-Pixel in Ihrer Auflösung zur Wellenbreite hin, bei einem analogen Oszilloskops als physikalische Sondenprobe noch genauer).Es fehlt einfach ein realistischer übergangsloser Sonden-probenspeicher der Mhz,Ghz,Thz,ExHz, bereits beim Erstdurchlauf ohne große Beeinflussung reell speichert und später verzögert in einer hochauflösenden Sequenz scannbar abrufbar macht.
We bought something similar to this for the workshop; especially useful for checking ABS sensors. It's easy to use, even for the Aussie apprentice. Single shot, spin the wheel and you can instantly tell whether it's the sensor or chipped or broken tone ring. Brilliant; paid for itself within the month. Also if it's run over, no great expense. If only people would remember to recharge it AND put it back.
agreed !
A pocket scope shootout video would be great. I'd love to see how the available pocket scopes, both premium and budget, stack up against each other.
And thanks for the very informative video on this pocket scope with the tear down explanation of the AFE problem designed into this one. (Not to mention the issues with getting 500Msps out of any ADC and into any uC!)
That was measured in Chinese Mhz. Very similar to Chinese watts on amplifiers.
Don't forget Chinese mAh.
Or chinese power savers
@@chupamishuevos303 Or chinese electrolyte caps without the juice 😂
How do you convert normal MHz to chinese MHz???
or Chinese Welding Irons
This is the 4th under $200 hand held ("small") scope I have purchased, and for my work under 30 to 40 MHz, it does a nice job. If you do the obligatory "divide by 3" on the specs for the Chinese claims, it works well within the "calculated" specs. In other words, for an old Ham (as in in Geezer over 70) doing simple work on HF gear (2 to 30 MHz) it's the cat's meow.
There's an easy hack to improve this. Just cross out the 100Mhz and write over it 20Mhz. Done!
Just scratch M and write G. There.
Might be best to just tip-ex out a 0, just to be safe.
@@JasperJanssen naw, man, just add a zero. Zero is zero, doesn't make a difference, right? The Wanhunglow way.
20 Mhz is enough for most Arduino projects. The highest frequency the Arduino (Uno / Nano / Pro mini) can output is 980 Hz, so even a 5 Mhz scope would be satisfactory.
@@dotancohen I have made Arduino uno make 4Mhz square wave so you can go higher...
I can think of a some good uses for this device despite its limitations. The biggest one is for field use by clumsy people who can't be trusted not to break the Fluke scopemeter but that still need an oscilloscope. This also could include classroom use, where people tend to do stupid things. In both cases the required bandwidth would probably be well below 10MHz for basic measurements. Another place this would be potentially useful would be when working with things like motor drive systems, where an ungrounded oscilloscope is required, though I don't know if I trust their statements on the voltages it can withstand. That being said, second-hand equipment from a known good brand may be a better choice.
I use it to look at analogue synth circuits and their behaviour. That envelopes, filters, PWM work like they should. Only visually though. Operating on up to 20 khz range audio range strictly. It does its job fine for that.
To be fair, if it can't handle audio frequency work... XD
Given the nature of what an oscilloscope actually is, any modern PC innately can implement a scope entirely in software through the audio hardware.
since that's typically 192khz ADC with in some cases 32 bit sampling and an inordinate amount of sample memory, it's a pretty interesting improvised method for low frequency work.
For similar reasons a mobile phone (if it still has analogue inputs) might be coaxed into doing similar tasks...
Of course, the reliability of this would depend on the frequency response, and there's stricter voltage limitations (probably requires external circuitry to protect the audio inputs)
But at the end of the day... For low enough frequencies... XD
Basically, you are saying this is a toy for children. At least you are honest in your assessment. The marketers are outright liars.
I am shocked that something on Alibaba does not meet specs.
I'm surprised a well respected internet expert doesn't have clue what he's talking about sometimes.
Maybe not.
i have one, use it all the time for a lot of basic use mainly in situations where i want to test for the existence of a signal rather than much more detail on it eg fuel injectors firing , mosfets triggering, serial output actually coming out of a pin etc stuff like that to me and my limited budget it's a gem for what i want, would i try and use it to replace a high end scope ... no way
I don't blame you. Budget is the biggest restriction on life itself. I have a MiniDSO (from e-design I believe?) 4 channel, 80Vpp, 1 output 10hz-8Mhz, 1kSa/s - 72MSa/S. I would much rather have a bench top as I am still learning. (And knobs and dials work better for me, and look cooler) but budget...
The Vpp really leaves me out of my usual field of 3ph480,wye and delta's.(just got my new 3ph power meter!) Would be nice to have something more portable* that was tuned to 10-400Hz..
*My mini dso is so handheld that it's fragile, and has to be plugged into power to be reliable. The "levers" also click like left/right mouse clicks.
@@jamesharrell4360 of course on a $70 analyzer you get lots of limitations (including errors) but you are forgetting about one KEY advantage here: portability; this is a MINIATURE scope for gods sake, this product was Sci-Fi about 30 years ago! it's like complaining about your $300 smartphone not taking the same quality pictures as your huge and bulky pro $3000 Nikon; as Chris Bate stated so well, for DIY projects and hackers on the go this $70 chinese analyzer is a good compromise favoring portability and autonomy; of course you only are going to check if some signal exists around some values; you arent going to exactly measure anything on this, not only because of quality components restrictions but also for tiny display resolution that makes it physically impossible to get accuracy
Ah Ha. A comment that is well considered and accurate; almost a first for RUclips comments - well not so in the case of EEVblog which doesn't attract many idiots. I also do woodwork where it is a case of 'horses for courses' and not all my tools are expensive. You are using this gadget for, it seems to me, precisely the purpose for which it was designed.
I'm with you. I bought one of these even after watching this video. I do have a 100 MHz Hantek and I do have an analog 50 MHz Tektronics... but my work in industrial automation frequently takes me to factory floors where having a means to look at signals 10 whole KHz and below is a huge time saver. It fits nicely with my bank account and in my laptop case.
Have one, too. Best thing is it's mobile. Better than the 2k Agilent you don't have with you.
The battery indicator shows near empty. I think you should charge this device into full and repeat your test. I want to see credible result.
I love how you tear it down with the USB still connected and it powered on. :)
I ordered one of these the other day. Ideal for me to measure 28MHz and 7Mhz clock signals on the move.
Confirmed, it's perfect for me.
@@ZaPpaul would this be ideal for say automotive 12volt signal testing. For like oxygen sensors ignition systems etc? Mainly just for viewing wave forms to see intermittent faults. Or a similarly cheap(well more $ than this) scope that i could use for watching mostly analog some digital wave forms
It boots faster than Keysight though! - 23:12
becouse it hasn't too much to boot
For the cheapie scopes that all seem exaggerate bandwidth (or conflate real or imagined sample rate with it), however, you get a lot more performance out of this one with its 2 to 5 times exaggeration versus the DSO211, DSO212, and DSO213 claiming 200 KHz, 1 MHz, and 15 MHz respectively with a similar exaggeration. And those cost from about $65 to $210. So, the 5012 is easily the best value (if you just must have one of the "mini" scopes) if bandwidth is important.
next week on EEVblog: uScope #1 - How to design a good analog frontend?
I would watch it.
Well, we've just seen "A $70 palm held scope isn't as good as a Keysight bench scope", so that one might be news.
It's called 'aliasing' sampling scopes suffer from it, its a beat between the sample rate and the input frequency - ex Tek calibration engineer.
God I love this channel! "It can't even!! No! It can't even ....!"
I understand.
You need a girly magazine to help you do that.
I love Dave's video's, you can bump the play back speed up 2x and he is still fully intelligible, saves me a lot of time, Thanks for the excellent info Dave 👍
True, but it doubles the the frequency of Dave's already bird-like voice....(Tears off earphones in 10 milliseconds)
My dad bought me a smaller LCD scope (pretty sure it's not 100 MHz, but it was only around 25 USD) and I was impressed that it was actually useful. I'd have killed to have something like that when I was Sagan's age. Back then, my neighbor had an old Tektronix 500 series tube scope because that's all he could afford.
A good electronics tech always understands the limitations of their equpment
Perfect scope at the right price for a kid learning the trade, I would have loved one.
It might not be a super high end frontend, but I do think it is very beautifully engineered with the price constraints. They gotta cut corners somewhere, and for the amount of components you get quite some performance. Outperforms a lot of (at the time very expensive) old scopes, quite amazing that you can get this for this price nowadays.
Anyway, I do think it would make a nice handy 'through in the toolbag' kind of scope to use in the field, or when working on things that cannot be transported easily into a lab (for example vehicles).
Very detailed video including the look at the internals of the scope. Really enjoyed this.
I just bought one despite the limitations. I have a bench scope (an older Siglent) that I use when precision matters. This is just for when I’m away from my bench and need a rough idea of what’s going on. It seems to me that as long as you know the limitations and don’t expect more of this device than it’s capable of, it should be fine for what it does. ¯\_(ツ)_/¯
Love your channel, however I do have to say it's a $70 portable oscilloscope. At $70 I wouldn't expect it to be precise but might be useful for timing or checking for a digital signal. Could be nice to have in the tool bag.
They most likely running the adc directly on dma channels on that arm. so sampling directly to sram. If they set the clock source from a timer they sure are able to hit 125mhz and use it as an dma-transfer trigger to boot.
Yeah, likely.
@@EEVblog
A comparator with a narrow sample time .
The trigger point is ramped, so on a repetitive wave form the whole wave form can be displayed.
This plug in would do DC to 1 Ghz
bee.mif.pg.gda.pl/ciasteczkowypotwor/Tek/7s14%20.pdf
also, Sampling Oscilloscope Circuits
w140.com/tekwiki/images/e/e0/062-1172-00.pdf
Your are correct that how they are doing it.
A reasonably accurate display of a signal in the Khz or low Mhz range, I bet that is what most sane people would expect and need from a scope of this price.
Pffffsh, for 70eu I'd buy that with 10Mhz bandwidth easily, and be happy with that!
Have one of those super cheapy ones in the toolbox, just for those cases when you need to see if I2C look about right, or if it even there.
I don't think a thumbs down is warranted here...100Mhz? no but it beats the shit out of a vellman pocket scope at $150. I don't know if they even sell those anymore, but that was my first scope...I used it to troubleshoot all kinds of automotive issues (mainly ignition) and would have KILLED for a cheapo scope like you just reviewed.
When I product lies about it's sample rate and memory size for starters, that's a thumbs down.
@@EEVblog
Fair enough, but I still believe that it could be useful despite it's exaggerated specs.
Any scope is better than no scope and it sure beats lugging a CRO around if you need portability.
Their English is better than my Chinese 😛
Indeed.
Are you designing a product for the Chinese market though? If not, it probably doesn't matter :P
TravelerInTime yes
TravelerInTime I’m a product designer, and work a lot with people in Shenzhen
@@InTimeTraveller
Don't bother, if it's any good they will put it on the market at a tenth of the price you are asking.
Within weeks.
I got one of these to play with as I am reviewing a number of low cost scopes to advise others for model railroad purposes. (Testing most of the DSOxxx tiny ones and larger Hantek ones like their 2C42 which I think is money MUCH better spent than for any of the "mini" scopes.) The one I got was marketed by Yeapook as the ADS5012H and seems identical. It is a somewhat different animal than the DSOxxx scopes which have ludicrously exaggerated bandwidth claims. The 5012 peak to peak voltage diminishes quite a bit once you get above 20 MHz, but it can still show a semi respectable sine wave to well above 50 MHz (although slightly flat topping above that). Of course, a square wave at those frequencies looks extremely trapezoidal. I found one of the most interesting features being that a button is provided for pretty much each of the day to day operations you do. Even a 1X/10X button is there which is something buried in a menu on every other scope I have seen. By far the easiest scope for a beginner to use. It comes with a 1X/10X probe but like most cheap probes with cheap scopes, it introduces voltage error and has no means for compensation. You need to use a 10X probe for max bandwidth so if accuracy is important, you may have to buy a scope probe that costs as much as the scope. I must say that after flailing at a number of the other mini-scopes and figuring out the trick(s) to access all the menu choices, this 5012 scope was like a breath of fresh air. It even came with a very nice semi hard shell case with room for accessories. Finally, the case has the slogan "A hardy tool makes a hardman". On the Amazon site, the slogan is "A Handy Tool Makes a Handyman".
These are popular in car audio for setting gain levels on amplifiers to prevent clipping
If its nearly as far off in terms off voltage... well good luck.
@@leocurious9919 Well, if you're just checking for clipping on say a 1 khz sinewave, it'll do the trick just fine. You don't need to read any measurements for that, you just need to see the waveform. It should be more than enough to handle audio signals since they're low frequency.
Needs a sticker/label for "Uncalibrated - for indication only".
It's possible that the chip may be capturing the samples via DMA to the GPIO. I haven't looked at the frequency / signal spec of the GPIO for the chip, but the block diagram has the DMAC, SRAM, and GPIO on the same AHB bus which can run at 168 MHz. It also has two DMACs. The details of the matrix didn't appear to be in the datasheet (it may be a multi-lane cross bar), but it is probably 32-bits and one full bus at least. That means that a single GPIO DMA transfer could occur at 168 MHz, reading all 32-bits simultaneously (16-bits of sample data and 16-bits of garbage). And since the two 8-bit samples are contiguous in time, it doesn't have to do any weird repacking. I would be more interested in how they are doing the triggering, especially since it looks like the clocks are from DMA transfers?
I nearly bought one, thankfully I saw this review before I did, needless to say I didn't. Excellent review EEV.
That one might be really great for properly setting gains on audio gear. Cheap, small and best part, portable!
SMD sells gain setters, crossover calibrators and real time power usage meters on amazon and his site.
@@damianLsmith To be fair, this could do the gain setting for a fraction of the price.
@@damianLsmith also is thousand times more expensive
I think it could be good for automotive things like checking camsahft position and oxygen sensors.
With one channel ? No. There are 4 channel oscis for 135 dollar but the probe has a small Wifi N Adapter and needs new probes, so that is the only downside. It is enough for car electric, I even probed CAN with it to find problems in the data bus.
and battery voltage :D
@@0dium. I can measure that with a cheap multimeter or my scan tool
Good to know that fuselage won’t have any air leaks lol
I was relieved!
It also has AUTO Anti-Burn.
That and the leak free fuselage leaves your Tektronix in the dust.
@@EEVblog Dame Edna Everage
Dave, think for hobbyists also. Its ok for them.
I have one of those DSO Shell clones as a toy and it sometimes comes in handy to do some quick measurement at a weird location where you don't want to lug the scope.
However, in my experience the big limitation in a lot of applications is that it does not have external trigger or 2-channel operation (where I could trigger from one channel and view the other).
This one does not have it either... apparently not a use case the developers of these gadgets envision.
It's easy to look down one's nose at a piece of kit like this in this day and age .. but I can see this as a relatively useful little gadget for simple breadboard play and debugging. Sure, not aligning an MRI machine, but even for "simple" service gigs .. is "this" particular output at least varying it's PWM signal? Would be a great auto service industry tool, the environment typically too harsh to risk the $1600 Fluke s'meter. Seventy bucks is a barely few hours worth of pints sorrow if you drop the little thing in a bucket of coolant. Not going to replace the 1GHz Tek mainframe, but I wouldn't be embarrassed to have one. Spent quite a few years with a "tool" fashioned from 5x7 LED matrices, LM3914's and 4017's as a rudimentary "scope" working on cars. I would say that this thing has it's place as an enhanced "go/no go" bit of test gear. Hell. remember what you paid for your first logic probe back in 1978??
I've got one like that for my job (TV) and it works perfectly, more the enough I think, thanks a lot
I can see a purpose for this as a teacher on a limeted budget who cant afford lost if expensive scopes who purely needs to show a student wave forms and a practical side of electronics as a good option
Or you know, if you want something better than one of those DSO kits, but don't want to break the bank or chance a second hand CRT scope
Could be useful for someone getting into DIY Synth. Rarely need to view any wave forms outside the audio range.
Plenty of wun-hung-low models that can do "good enough" for audio frequencies. Many of them are cheaper.
@@QlueDuPlessis Not to mention that you need an accurate voltage reading if you're working on the preamp stage.
Agreed!
Any digital interface is above 100 MHz even the old USB2
For audio frequency all you need is a PC with decent sound card and just download some nice free software.
Just my 2cts...
lol. Reminds me of an article from an electronics magazine about 20 years ago which gave a design for building an oscilloscope into a gameboy cartridge.
I guess that would be an amusing comparison - is this thing better, or worse than a hobbyist magazine project to turn a gameboy into an oscilloscope?
I know I have the design somewhere...
I wouldn't be surprised if that works better, simply because hobbyists are less concerned with meeting a price point, so it comes down to the design skills of whoever put that circuit together.
Of course, a Gameboy only has a 4 mhz z80 processor, but whether that's an issue or not depends on how the oscilloscope circuitry is designed and how it's interfacing with the gameboy...
Since the Gameboy just hands addressing to the cartridge, you could do some really stupid and powerful stuff. You could just make the Gameboy CPU run a simple thing that blits cart memory onto the display, and have a 1 GHz ARM SoC in the cart do all the heavy lifting.
AFAIK the game boy scope did not come close to meeting 20 MHz.
I have one of those cartridges..... fine for audio frequencies up to 100 KHz!
many thank sir for the detailed analysis of this mini oscilloscope, i have ordered one of these before i see your review and i do not regret it, for its money is fine, I want to use it for audio purposes and hf frequencies, i know is a cheap instrument and i know i should not expect much of it but the way i wish to use it is fine, anyway what you pay is what you get, for more professional instrument we have to put our hand deeper in out pocket,,, otherwise, find the cheap solution ...
Well, it's a bit unfair to contrast a Rolls Royce with a Kia because if all you ever drive is your uncle's Royce you are going to think the Kia is crap. Likewise with this $70 scope. I used to build a lot of Ham band CW transmitters and used a BK Precision 30 Khz 1474 scope that was probably built in the mid to late 70s. All I needed the scope for was to see that I had indeed a signal, a rough idea of the watts the transmitter was putting out and an ability to look to see if the band pass filter was attenuating 2nd harmonic. I was pretty limited with the 30 KHz scope I have and it cost more than $70. So while the scope you tested will not stand close to an over a $1000 scope it still would probably suit my needs when constructing simple transmitters and a hobbyist can't really justify an expensive scope from the perspective that repair jobs will pay for it over time. So, yes, I'd give it a thumb up for its price range when one uses it within its limits.
This is a good step up from a DSO138 if you're not ready or don't have the $$ for a benchtop.
Definitely not for SRS BSNS but for a hobbyist doing things with 555s, Arduino, etc, it gets the job done
Just ordered one
Why are you being too harsh on it?
It's a pocket scope and a cheap one too
For my uses it will be more than adequate
A simple low cost scope like this works fine for R/C where you just need to look at low frequency signals to troubleshoot and a $1000 scope would be overkill.
I have one of these for repairing old computers, to see digital signals not higher than 50Mhz works quite well, when I need to see something really accurate then I use my old scope, but for saving space on the table is quite good. Also, mine doesn't has the coupling problem, maybe your unit is deffective, did you bought it on the FINSR store or in other one? I know they resell their "faulty" units to other stores and they sell it cheaper.
He says in the video he bought it from their official store.
But yeah, no QA process is perfect :)
is it good for repairing devices around 20mhz?
@@ivanbiasutti4567 For digital, sure, I get good signal readings up to 50Mhz (clock and bus transfers), for analog... not really sure as I haven't tested it, I only have an analog signal generator up to 10Mhz and with these it has no problem at all.
Dave rushes into things, it's a complicated quirky device that will take time to get friendly with, like women, horses and helicopters.
Glad you were able to scope it out for us. Those early oddities signaled the trouble ahead. If the original designer was a woman, I'd like to meter. I may have only a single shot at connecting with her but I'd make the most of it. Well, need to hop on my cycle as I do with great frequency. Take care!
iv seen others reviewing this meter & none of them put it through it's pace's like you did. I was going to get one but iv changed my mind now.. so thank you Dave for opening my eyes to the obvious flaws of this scope IF THEY UPGRADE THE SOFTWARE ILL CONSIDER BUYING UNTIL THEN ILL HOLD OUT FOR SOMETHING BETTER.. but then again if this models price drops "A LOT" ill get one!! but until then i wont be holding my breath.....
I am a Chinese, to be honest just dont buy this type device. Save money and buy a brand one, at least rigol siglent even uni-t or owon
Depends what you need it for. I have a Siglent SDS 1104X-E, and to me it's a pricy hi end equipment. I wouldn't feel comfortable using it in a field where something may happen to it mechanically, or some unknown signal may fry it. The $70 scope would be PERFECT for such use.
I’m a mechanic spent thousands of bucks buying pico. It’s an overkill to me , portable and cheap device like this is what most of us need. Hope fluke might come up with device like this.
Have you seen the network analyser for under
$100 ?
I can't afford thousands for a nice one.
@@lasithrajamanthri5992
I bought a Tek 485 for 50 GBP on Ebay.
显着你了是吧，妄自菲薄。
Mini series of cheap aliexpress handheld oscilloscopes reviews anyone?
Half of them are the same guts, different casing.
@@tin2001 - Are you talking about girls or oscilloscopes?
@@thekaiser4333 oscilloscopes..
Thanks for the review, I was looking into buying one but probably won't after watching this. It's a shame because as you mentioned there is a lot of untapped potential in this product. If the analog front end could be made more robust and if it came with better firmware, it would make a great scope in this price range. 20-40Mhz would be good enough for most hobby electronics use so I don't think that's a problem.
there is the model for an example: hantek 2C42/72 or 2D42/72..... its s scope, function generator and a multimeter all in one... --42 for 42mhz or --72 for 72mhz...
That programming error you found is very common. It's referred to as the "off by one" error.
This device is:
Built out of components worth at most $20.
Smaller than your phone.
WAY more snappier than most benchtop scopes.
All I hear is laughter and the word "dissapointing". Whoa. Looking at it as a prototype or proof of concept, the potential is rather amazing IMO.
My question after watching this is: what is the cheapest you can make a 100Mhz scope that will "pass the mustard" on all the hardware tests? Is this a component cost limitation, or is it a lack of NRE/design excellence/design validation?
As you've seen in this case it's the limitation of the microcontroller that undermines the claims. An FPGA capable of the signal processing can cost as much as this scope alone. And once you're using an FPGA or a microprocessor you'll likely need multiple power supplies, 4 layer PCB, etc. all adding up to a cost which lands in a gray area, where it's too expensive for hobbyist but hard to justify over for example a benchtop 2 channel scope.
There's still a giant gaping hole in the scope market for people who can't possibly justify shelling out a few hundred quid for an entry-level "proper" scope (and are not in the mood of guessing what condition the CRT of an antediluvian, used one is in) yet need to see the shape of things happening occasionally - and this thing is coming awfully close to actually filling that hole. With a proper 100MHz bandwidth, it *would* fill it too.
As for actual value measurements, ain't nobody (except Dave, natch) got the kind of money that would pay for a scope that has the precision to actually measure anything numerically - because 8-bit entry level scopes are sure as heck NOT doing that particularly well either. Measuring precisely is just not the scope's job in any hobbyist's lab.
Attila Asztalos Yeah, this would fill the hole for me either if it truly did the bandwidth it claimed, or was a tenner cheaper. I could live with a 0.2 volt inaccuracy.
It’s possible to do this stuff in this form factor and for that price, it just requires an experienced designer who can do some lateral thinking. I’m sure this SOC has at least a 32-bit RAM, so using DMA it should be able to transfer 4 bytes each cycle or two. Say it can push 200MBytes/s at 100MHz clock. It would need an external latch and a little ring counter to latch bytes 1-4 in order. Not expensive at all. So this ADC pushed to do 100MSPS each (I’m sure they use the lowest speed grade though so it will do way worse than a good 8bit one would) gives a solid 200Msps. The clock phasing needs a varicap and PWM output from the MCU to adjust for minimal distortion. And then the front end could be done better too, perhaps with internal calibration path and you could use transistor amplifiers and not opamps to get good bandwidth. It’s 8 bits and a crappy ADC, so even the cheapest discrete transistor signal chain wouldn’t make things any worse at all. So yeah, I believe it could be done better for the same price at similar volume, assuming the engineering time was free (such a design itself would be expensive since there aren’t millions of people who could pull it off the world over).
@@absurdengineering I've heard of an interesting technique here: hackaday.io/project/10119-sdramthingzero-133mss-32-bit-logic-analyzer
It's a bit like the old trick of using an EEPROM as an FSM, except you use a DRAM chip as an FSM to drive the address and control lines of another DRAM chip, with its data lines connnected to the ADC outputs.
As you mention the clock generation is something that needs careful consideration. For a 100MSP ADC you would want < 2ps RMS jitter in the clock. I think this could be done relatively cost effectively by using an LVDS clock generating chip, since they already have the two-phase outputs with low phase noise and jitter. A huge problem with this device is that it uses the mcu PLL to generate the sample clock, and these typically have poor characteristics.
It will skip a 100 Mhz wave with a frequency meter every 10 waves and then one
mixed wave a little phased continued as a small phase offset phase to measure at the representative phase of the new wave in the 25 MHz range. In order for this to be possible, a synthesized mixing and average wave at 8 transistor R-C gates is quenched and then sampled much slower. This is set to a 25 Mhz (100 Msps) clocked AD converter, although at the correct phase beginning of the display. However, the virtual image is displayed in the 25 MHz mode of the second AD converter. The representation of the output is then synchronized a second time, with the input both synonymous and mixed to paint smaller display errors .-> Very inaccurate device but you can make for just € 70 very rough wave analysis with digital smooth shit. However, a precise sequence analysis is installed. At least it works right up to 1 MHz. The preamp is, however, a little less but just enough at 50 mV. Also missing is a switchable 50 hz filter. Nevertheless, it is practical for very small applications and budgets. You could also install a 500 Mhz AD converter (for plus 20 €) accurate and mix up to 1 ghz hereby roughly, with an frequency divider oft 10 ghz (well this with 17 €, and fastest 7x transistors only manage to 10 ghz, add 7 € ) A little unfair the comparison, but some are looking since 20 J such Oszi for the vest pocket, but with higher frequency. The Umts-Aera did not change the most consumer limit of normal ozilloscopes over 30 Mhz. The mixing methode was 20 years ago discribed in some science journals, I believe to remember. An 10 Ghz mixed vest pocket would be true timely.
Say that in 12 words or I won't believe you.
Wish they had these back when I went to tech school in the late 90s.
Planning to pick up a cheap $30 DIY one just for the fun.
The fist clue is the retail pricing... Thanks for sharing this evaluation. Great work. Cheers, #SeattleRingHunter
If they hadn't made the claims beyond what they really did, it would be not a bad deal. The analog scaling could be a lot better without a lot more complexity. It would likely involve some 2% capacitors to get the gain flat enough to be an honest 3db at 20MHz.
Another somewhat affordable one is a PICO SCOPE it’s for automotive and plugs in via usb
I have never (in the decade-plus I kept my eye on them) seen those guys sell anything that could have been called affordable, or worth its pricetag for that matter. The one they sell for well-no-not-really-a-hundred-bucks is literally a toy (even compared to this one) with its 10MHz bandwidth, and the one that is actually supposed to do 100MHz costs the price of not one but TWO brand new entry level "proper scopes".
Horses for courses. I'm very impressed by the price. Need 2 channels though.
Seems way more useful than the Chinese 1MHz AVR-based things. Pushing it for crappy audio there.
My main one now is a ''Bitscope' thing - 100MHz, 2 analog channels, maybe $250 dinky ADC box to plug into laptop (NSW company, btw). I thought I was going to need some logic analysis, has that in spades. Still haven't used those bits. The software is a bit weak, unintuitive, but has most things you'd want. Only really used on
Just gotta be aware of what it can and can't do. And for 70 bucks, what the heck. Still a nice portable pocket scope. I'd own one.
Plenty of good work has been done using 10Mhz scopes throughout electronic history. China engineers should put less effort into making the fastest pocket scope and more into making the most usable pocket scope, a true 10 or 20MHz scope, mobile-tablet size with all the usual functions and an actually good usable interface (DSO Quad/Nano/203/whatever ... argh, I hate the thing just for the stupid interface confusion!) for $100-150... it seems like it should be possible.
This might be a fun starting point for a project.
I was gonna buy this but hesitated.. Thanks of good review showing problems which makes it useless for me. Thanks again!
I have a DSO 068, at first I didn't like it much, but as the time goes by I getting to like it more and more (battery powered, don't need to worry about ground loop, etc.). The biggest advantage it has human inerface, I don't care if a scope has 10Gs/s if I can't use it effectively because it has no knobs just buttons, or even worse only touch interface.
Is the $70 price point reasonable for a 20MHz portable oscilloscope? If FNIRSI were selling this _as_ a 20MHz scope, and not trying to pass it off as something more capable than it is, would it be worth it?
Learning basic electronics. Have a few multi-meters.
I'm researching "cheapie" less than $100 oscilloscopes.
I read that the most important spec is bandwidth.
I've noted that $40 to $100 scopes have severe bandwidth limitations ranging from 200K maybe up to ~1.0 MHz with reasonable (+/-5% ?) accuracy. I've noted this scope advertises 100 MHz bandwidth, but is reasonably accurate only below less than half that, maybe 20 to 30 MHz. I'm wondering if all the cheapies greatly exaggerate their specs like this. They call it "Chinese specs", I've learned.
What I would like to know is 1) what type of testing can be done with reasonable accuracy with such low bandwidth scopes, and 2) what types of testing should be totally out of the question/avoided.
I understand the guideline that a scope should have a bandwidth 5 times the frequency of the things being measured. My question deals with what types of circuits generate frequencies that are in this lower bandwidth range.
My scope functionality question pertains to testing these kinds of circuits: Beginning hobbyist testing such as in Platt's Make: Electronics or Basic Arduino type systems.
$100 is my absolute limit; preferring $40 to $80 range. This is just for a "toe in the water" "explore the basics of scopes" sort of thing. I know that if I spend "just a mere $200 more" I can get a "real scope." And no, don't want to mess with used or eBay.
Here are 4 scopes in my price range, including this one:
www.amazon.com/dp/B07QML4LJL/?coliid=I3UEZDO1F0D9V8&colid=3B04RKX85L5W0&psc=0&ref_=lv_ov_lig_dp_it www.amazon.com/dp/B07V6795WP/?coliid=I3IXRDY73S9RI5&colid=3B04RKX85L5W0&psc=1&ref_=lv_ov_lig_dp_it www.amazon.com/dp/B07XBL4BTL/?coliid=I31BECTM93K5LJ&colid=3B04RKX85L5W0&psc=1&ref_=lv_ov_lig_dp_it www.amazon.com/dp/B07TNPYLS5/?coliid=I1RS7IOEMH7PJ6&colid=3B04RKX85L5W0&psc=1&ref_=lv_ov_lig_dp_it
I'm sure the mfgr appreciates your debugging their product. I'll wait for the revision where these issues are fixed...
Of course theres the Hantek 2C42, which is a 2ch 40MHz bandwidth handheld scope with DMM, available in a 70MHz variant and optionally with a signal generator. Has a decent looking shielded analog front end, an FPGA for acquisition, etc, and has been getting good responses from both the eevblog forum and the electronics channel on freenode - and is $99. But then, I recommended it for review several months ago, even offered to send one in, and was met with "no way, i'm not wasting my time reviewing any cheapass chinese scopes" -_-
i.imgur.com/EKq3XZK.jpg
i.imgur.com/KlW6zD3.jpg
Edit: Added Internals Images (if youtube will allow them)
Is it true 70mhz?
DJ can you do a follow-up on the whiteboard and draw a schema showing the resist divider front-end, the capacitance problems/origins, then maybe block out how the rest works? Like front end to divider, then ADC/micro etc? And maybe compare to "proper" front end? Im interested in how they went about designing it at a low cost, but came a gutsa with certain decisions.
That might make an interesting video.
@@EEVblog yeah - its great when you break out the board and go into a bit more detail with some of these things. And voltage division/ratios through resistors is a base concept, so may be a nice hook for beginners to get into & understand. And to hear from you why, even though the division works, it didnt cut the mustard here freq wise. And maybe why this thing could never get it's advertised "banner" specs because of hardware/silicon choice? Cheers mate - love ya work.
Seems fine for some low key automotive applications?
Nicholas Anderson I was thinking the same thing but still watching this video. Had a 04 Camry with weird Transmissons issues, put a $40 pull a part ecu in it and it fixed it. I would have liked to view the solenoid duty cycle waveform to properly diagnose it.
@@dorhocyn3 seems like the perfect application for something like this
That's what I'm using my DSO138 for. A 36 tooth timing wheel at 10,000rpm is only 6K Hz, and the DSO138 is fine to 10K. Maybe even 20K. It's nicer than my DSO130, but it's also costs a 4x more, so it's probably too expensive. I'm starting to get into injectors, so it would be better for me to have a 2ch so I can see the INJ opening and closing at the same time to work out my dead time.
I think something like a cheap USB scope ala Hantek would be better since you have deep sample memory. For example, hook up to the camshaft sensor, start recording, then go and crank the car over, then come back and stop the sampling and examine the results. I know you can do this with triggering but just a straight datalogging adds validation. Or checking out a suspect wheel speed sensor: hook it up, go for a drive, when you see something funny pull over and have a look. If you really want to get dee p into it you can import into sigrok for looking at CAN for example.
@@paulmoir4452 USB scopes are a bit of a pain IME, having to balance a laptop and a fairly bulky interface within the engine bay, with a running engine is not easy.
It just reminds me the DSO138, a $10 oscilloscope with a STM32 directly sampling the input signal with its ADC lol.
According to the specified input voltage levels you can probe mains voltages with this crap box and by looking the PCB it seems the USB connector is internally connected to the measuring circuits without required safety isolation.
In this case, the 50 ohm load is not necessary, because you are not measuring a power, so 50 ohm of the generator, with the 50 ohm load in parallel, is 25 ohm, 25/50, it is 0.5, 0, 5 times 0, 7 equals 0.35, exactly what you read on the final, I would say it keeps expectations !!!
The AD9288 can be and is commonly overclocked, the Rigol DS1052E bench scope used 3 of the 100MSPS variants, so a total of 6x 100MSPS when interleaved, to achieve their stated 1GSPS.
Basically fine if the designer qualifies them to run at that. So i'd bet bucks this trashmeter is actually using the 40MSPS version, so a max of 80MSPS with interleaving without overclocking, and they're just overclocking the snot out of it, hence the terrible response at higher frequencies (tho im sure the front end doesnt help there :P)
You should do a review on the Mini/Nano VNA
#SayNOtoKILO the Nano is an amazing piece of kit. I should upgrade the firmware on mine as I need measurements up to a gigahertz. The Mini looks interesting although the inventor has been griping about the Chinese knock-offs. The Tiny appears to be Unobtanium now.
i also have a nanovna for my Antennas, and i have to say: it's doing his job well. But would be nice to see a rev. by dave
No!
The prices might increase..
Still better than the vellerman unit i have ! I only use it for checking pwm rotary encoders and Hall effect units and that little scope would be ideal for that
Thx Dave for the rvw. It appears to be a 20 MHz scope that's being pushed to higher freqs or claimed to have higher bandwidth. It's a shame the Chinese feel the need to lie so badly. Maybe you'll do or say anything to get a meal when you're hungry.
Again, Dave thx for the rvw and teardown.
My DIY JTE DSO-150 only cost $20.00 and does most of that in the audio range if you have the time.
Very good from India 👌
Yup, just heard your last comment. I'll check it out.
Change the 100Mhz to 20Mhz and you have got a gem of a scope that becomes essential for your toolkit. I voted this video down as all this harping on it's supposed shortcomings missed the real reason that this scope is so useful.
If it showed an accurate voltage 20MHz would be fine for the price for me.
Bei analogen Oszilloskopen scheint nur die mögliche Spannung zu entscheiden, wie schnell die mögliche Frequenz 1 GHz, 10 GHz, 100 GHz, zuletzt als normaler Trigger bei niederen Frequenzen. Das Problem ist die hohe und angepasste Impedanz und die Möglichkeit eines voll konzentrierten und gebündelten Strahls. Mit einem 100-MHz-Horizontal-Trigger erhalten Sie eine 100-MHz-Welle auf dem Bildschirm als vertikale Amplitude, wenn genügend Energie von der Kathode in Bezug auf die Ausrichtung und Ablenkung der Elektronen vorhanden ist. Die Bildbreite muss nur ausreichen, notfalls in Zeilen. Aber es scheint auch physikalische Grenzen zu geben, die durch die Platten des Oszilloskops verursacht werden, je nach der tatsächlichen Wellenlänge und der Streuung nach Wellen- und Kapazitätsdimensionen. Der Strahl wird nicht nur gebeugt, sondern auch gedehnt. Deshalb muss er wie eine harte Nadel sein vielleicht sogar von höheren Frequenzen umgeben, die von einem Bündler mit etwas wie einer kleinen Wolframbeschichtung im Inneren oder einer guten anderen Legierung erzeugt werden und die Streckung des Strahls verringern. Die elektrische Außenlinse sollte nicht versagen. Es ist je nach Konstruktion sehr schnell. Nur moderne Kinder glauben, dass es bei 50 Hz langsam ist. Es gibt spezielle Klystrons mit 500 GHz und mehr Transmission für harte Strahlen. Der Bildschirm ist nicht das Hauptthema. Aber das Auge ist sehr langsam. Daher ist ein zusätzlicher Bildschirmtrigger für Summationen erforderlich. Dann erhalten Sie den Vorläufer eines Bildschirmspeichers, verursacht durch natürliche Verzögerung der Pixel. Dies ist aber auch nichts anderes als ein Vollbildmischer mit höherer Frequenz direkt auf dem Bildschirm vollsummiert. Bei 90 ° seitlicher und vorderer Neigung können Sie zusätzliche Untersuchungen in physikalischer und elektronischer Form durchführen, wie eine "Sondenprobe einer Röhre", jedoch in "direkter präziser Mischumsetzung am Bildschirm" überwiegend visuell detektiert. Später wird mit A/D-Wandlern und innerhalb "trägen Halbleitern wie verrücht an dem Wellenverlauf spannungsmäßig herumgemessen. Nur dienen diese A/D-Wandler nur zum Nachmessen. Es fehlt vor allem eine realistische hochauflösende THz-Probe , deren Inhalt dann dann mit einem A/D-Wandler ausgemessen wird !
I want to get an Oscilloscope but I can't afford more than $250, looks like this is the type of unit I can get
Get the hantek MSO5000D it has a logic analyzer and can be hacked up to 200MHZ. I ordered the DSO400C for the signal gen but they sent me the 5000 series which is $250 more by mistake. I am really happy with it for the price. They sent me the 200MHZ version so I didn´t need to hack it. today is 11.11 and there are huge discounts on aliexpress so you may even be able to find the 4 channel DSO4004C for that price. Which can also be hacked up to 250MHZ so get the lowest bandwidth and do the hack yourself. If you don´t need the signal generator you can get the other 4000 Series and save a couple bucks but I think it is worth it. Hantek manufactures the Volltcraft scopes and entry level scopes for a couple other companies.
I just checked the 4 Channel 4000B is only 290 Euros and the C is 309 Euros and the 2 channel is 178 Euros with the signal generator from the Hantek store on AliExpress. They don´t have all their other models listed right now for some reason but the 80MHZ MSO5000 usually costs 254 so have a look around on Aliexpress today and maybe you find a discount. You can also find their USB scopes for under 100 if cash is tight.
I am really impressed with the scope for the price and if I ever have the money I will buy the MSO7000 they just released.
You can easily get a decent 2-channel desktop scope for that money. For example Hantek make some good value scopes.
You can likely get a new 2CH benchtop unit for that money these days.
@@EEVblog Yup as I posted above Hantek has at least 3 options for that and you can hack them up to 200mhz. I am more than happy with my MSO5202D.
Of course this microcontroller can drive the ADC through timers or pwm or a similar interface at 100MHz. You don't drive it manually raising a gpio pin from the code anyway. Then ADC can store the whole captured buffer through DMA into the MCU memory which then process it later.
Good video overview, as allways. You are the one l can trust on electronic device overviews. It would be nice to have a few overviews of „thumbs up” handheld 1 and 2 channel oscilloscopes for easy „on field” signal testing. Two channel oscilloscope is a must for speed an position encoder testing, with possibility to have one channel on X and other channel on Y axis.
RuiDeng RD6006W would be a good candidate for review
Ooh, hadn't seen that. Yeah.
Neue Technologie: ein Vorproben Chip für eine THz-Sonde.
Zur Zeit wird allerdings richtige Forschung nur wenig gefördert und weiterentwickelt. Andererseits sind sequenzielle analoge Wellenspeicher aus senkrecht aufgestellten Kapazitätsdioden im 500 Thz-Bereich mit einem horizontal querverlaufendem durchbohrten FET-Tunnel, (genauer durch einen FET wie ein gebohrter Thz-Kanal gehend und nur über Tunnel - Felder verbunden) als analoger Zwischenspeicher auch für genaue sequentielle Auswertungen im gehobenen Thz Bereich bis Exabereich präzise denkbar (natürlich ohne phasenverschiebenden Cluster-Mischer wie das einfache Taschengerät). Vieleicht produziert ja jemand einen solchen direkten Kapazitätsdioden- Seitenkanal- Chip mit um 90° horizontal ununterbrochen durchgehendem aufgebohrtem FET-Tunnel der als Thz-Frequenzsonde dient.(anstelle des Röhrenkanals) Dies wäre eine technologische Herausforderung und würde ganz andere Welten eröffnen. Bei minimalem Speicherbereich, je nach gewählter Tor-Zeit und einem analogem Entwicklungs-Plus auf dem Sonden -Chip . Quasi ein analoger Thz -HF-Wellenspeicher mit ausreichender Wellen-Laufstrecke digital abtastbar im Vakuum. Die Kapazitätsdiode kann dann mit einem AD-Wandler langsam bei aufgereihter Bedarfsstrecke im Wellenverlauf abgetastet werden. Der Speicherbereich würde hierdurch zurückgehen, da direkt abtastbar. Über einen schnellen Frequenzteiler muß allerdings die Torzeit oder das Samplevolumen/Zeit trotzdem mehr oder minder getaktet werden. Der Kanal könnte auf verschiedene Resonanzen getrimmt werden. Aber auch ein Lichtkanal könnte zur Untersuchung des Korpuskulierungsgrades des Lichtes in einem modifizierten Modell untersucht werden. Und sogar ein filterbares Spektroskop aufgebaut werden, welches bis zum Spaltexperiment geht mit Talbot-Auswertung, bis in den oberen Lichtwellenbereich. Vieleicht gibt es diesen irgendwann für jedermann und sogar im Westentaschenformat für präzise Physik.
I recognize the OS on that thing. The hardware on my pocket DSO is janky AF. I like that this one has Up, down, left, right buttons! Regardless, my Rigol kicks it’s ass. 😆
Your Rigol costs much more lol
David Piçarra the 4 channel Rigol was ~$300, my pocket DSO was just over $100.
I bought a few years ago a mini oscilloscope named ''Mini DSO'' on ebay. It looks quite similar to a mp3 player and it seems to work better than this one! I can _relatively safely_ measure mains noise with it, with a little transfo coming from a 600V electric panel pilot light with integrated 600V-24V transformer.
Looks like the 100MHz is aliasing with the sample rate. Probably occurs on multiples of that. Also in normal tigger, I wonder if it would be stable if you scroll to the left side of the waveform (the first cycle of the trigger). For the price, it works pretty well.
Thanks, Dave!
I was close to buy it, your video right in time to be aware to buy it.
Would have been make some things easier. No problems with ground/grid isolation, portable,...
Im EEVBlog wird eine 100 Mhz Welle mit einem Frequenzmesser alle 10 Wellen übersprungen und dann eine Mischwelle einen kleinen Schritt phaseversetzt weitergesetzt um an der stellvertretenden Phasenstelle der neuen Welle im 25 Mhz Bereich zu messen. Damit dies möglich ist wird quasi eine synthetisierte Misch und Durchschnittswelle an 7 Transistor (R)-C Gliedern verlangsamt (und zeitlich phasenversetzt wie bei einem Sharp-Rechner) zwischengespeichert und dann viel langsamer abgetastet. Dies wird mir einem, 100 Mhz getaktetem AD-Wandler zwar an den richtigen Phasenanfang der Anzeige gesetzt. Das virtuelle Abbild wird aber im 25 Mhz-Modus des zweiten AD-Wandlers dargestellt. Die Darstellung des Ausgangs wird dann noch ein zweites mal mit dem Eingang synchronisiert und analog vermischt um kleinere Darstellungsfehler zu übermalen.-> Sehr ungenaues Gerät aber man kann für knapp 70 € sehr grobe Wellenanalysen glatt dargestellt vornehmen. Eine präzise Sequenzanalyse ist allerdings verbaut.Schon ein bisschen Schmu , aber trotzdem praktisch. Wenigstens arbeitet es bis 1 MHz präzise bis 10 Mhz noch glatt darstellend, bis 100 Mhz noch grob analytisch. Der Vorverstärker ist allerdings mikrig aber gerade noch ausreichend bei 50 mV. Dies ärgert etwas, weil ich das Gerät nicht mit einem andern Rückkopplungswiderstand auflöten möchte. Ebenso fehlt ein zuschaltbarer 50 hz-Filter. Trotzdem praktisch für Kleinstanwendungen und Geldbeutel. Man könnte auch einen 500mhz AD-Wandler einbauen (für plus 17 € ) als saubere Lösung und bis 10 ghz hiermit grob analog-halbdigital mischen. (gut die schnellsten noch preiswerten 7 Transistoren bis 10 ghz fehlen noch. Summe: weitere 7 Euro) Ein bisschen unfair der Vergleich, allerdings suchen manche seit 20 J ein solches Oszi für die Westentasche. Das Gerät hat natürlich eine relativistische Macke eines Vermischers. Für ganz simple Alltags Messungen allerdings noch anwendbar.10 Ghz - Mess- Mischer würden dem Zeitgeist wieder aufschließen.
Bei rein wissentschaftlichen Anwendungen wird hier natürlich alles physikalisch extrem unüberschaubar und grauenvoll bei dieser plumpen Transistorfraktionierung auf die einzelnen "wenigen kleinen HF-Transistoren" (hier sind theoretisch sogar die im Ghz- reagiblen Monitor Analog-Pixel in Ihrer Auflösung zur Wellenbreite hin, bei einem analogen Oszilloskops als physikalische Sondenprobe noch genauer).Es fehlt einfach ein realistischer übergangsloser Sonden-probenspeicher der Mhz,Ghz,Thz,ExHz, bereits beim Erstdurchlauf ohne große Beeinflussung reell speichert und später verzögert in einer hochauflösenden Sequenz scannbar abrufbar macht.
This pocket scope is great.