EEVblog #1260 – $70 100MHz Oscilloscope?

EEVblog #1260 – $70 100MHz Oscilloscope?

Is this FNIRSI-5012H 100MHz bandwidth 500MS/s Handheld pocket oscilloscope any good?
Review + Teardown
Mystery of x1 Oscilloscope Probes revealed:
Reverse Engineering forum thread:


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  1. Levi Johansen on September 2, 2020 at 9:26 pm

    Looks horrible, but I want one 😎

  2. o-scope on September 2, 2020 at 9:26 pm

    I don’t understand, why don’t you choose dso1511e+? It has a better analog front end and software is more refine.

  3. That engineering channel on September 2, 2020 at 9:26 pm

    I would like to see something about the Hantek 2D72, it looks like a better scope.
    I might film a review if I get one.

  4. mauro mauro on September 2, 2020 at 9:27 pm

    Dave despite having expensive tools, you can’t measure !!!

  5. The Fox on September 2, 2020 at 9:27 pm

    Seems too harsh for something that isn’t meant to replace a desktop unit.

  6. mauro mauro on September 2, 2020 at 9:28 pm

    How do you expect to measure 50, 75 mhz square wave with a 100 mhz oscilloscope, is the harmonics where you left them, let’s measure up to the 5th harmonic, you would need an oscilloscope with at least 500 mhz of bandwidth !!!

  7. mauro mauro on September 2, 2020 at 9:30 pm

    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 !!!

  8. keith king on September 2, 2020 at 9:31 pm

    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…..

  9. Isul Machdar on September 2, 2020 at 9:33 pm

    It’s a nice cheap 10 MHz pocket scope….
    oh wait… then it’s not so cheap 😂🤣👻

  10. keith king on September 2, 2020 at 9:35 pm

    Dave i have a DSO Shell 150 you know the one’s you can get dirt cheap as a kit build.. I haven’t put it together yet although i have it a good while now.. but what i wanted to know is one of those little DSO kit builds for around 15/20 bucks worth getting more than that one your reviewing???? if you know the kit im talking about could you give me your thoughts on it?? or anyone else reading this comment!! who know both scope’s(& i say scope with pinch of salt.) and if anyone else reading this know the answer to this, i would appreciate it.. thank you..

  11. Deftones Dsm on September 2, 2020 at 9:36 pm

    Well if it does 20mhz would this be useful on automotive 12volt sensors? I could use this and the name brand olliscope/scanners are crazy high price

  12. CW Radio on September 2, 2020 at 9:43 pm

    Did you try a proper probe to see if it would correct any problems?

  13. Jakob on September 2, 2020 at 9:43 pm

    Can it be this channel has not tested any of the more decent and perhaps also honer labeled cheap pocket scopes??
    What’s the take on Miniware DS line.. like the DS212 it seems to be around the same price as this 70ish.USD? with an STM32 chip

  14. smeggyhead1 on September 2, 2020 at 9:44 pm

    I nearly bought one, thankfully I saw this review before I did, needless to say I didn’t. Excellent review EEV.

  15. 永胜制冷 on September 2, 2020 at 9:46 pm


  16. Jeff Hambleton on September 2, 2020 at 9:46 pm

    Not serious. Like a child’s telescope. Gets him excited so you have to buy a proper one. Costs you more in the end.

  17. Mile Test Lab on September 2, 2020 at 9:47 pm

    Can test dso1c15 110mhz .. how they can achieve 110mhz on 5ns on display. That would come across less then 2 Squares on LCD screen.. can it really do 110mhz

  18. dale durando on September 2, 2020 at 9:47 pm

    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.

  19. Maggot Brain on September 2, 2020 at 9:47 pm

    But you can try to copy it and improve it, because they gave it a shot to make something everyone can buy.

  20. Stephen Fellner on September 2, 2020 at 9:47 pm

    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.

  21. Farley Hill on September 2, 2020 at 9:50 pm

    The design of a scope front end is the epitome of analog circuit design.
    And the 2nd-petome is to go digital
    This is why the one bit DAC was invented.

  22. mauro mauro on September 2, 2020 at 9:52 pm

    The measurement is not correct, because the fnirsi does not have the correction for the 50 ohm , the keysigh instead yes !!! note that the waveform is not distorted, so the passband is good, consider that any oscilloscope, has the passband at -3dB, so a signal of 100mhz, 1v pp, measure it 0.7v pp, missing the correction 50 ohm measures 0.3v pp !!!

  23. Steve Robbins on September 2, 2020 at 9:52 pm

    The design of a scope front end is the epitome of analog circuit design. For those who want to learn this art, there is a great article by Steve Roach, "Signal Conditioning in Oscilloscopes and the Spirit of Invention". You can find parts of this on line for free, but as far as I know the full article is only published in a book "The Art and Science of Analog Circuit Design", edited by Jim Williams. ISBN 0-7506-9505-6. And there are a lot of other great articles in the same book.

  24. D800Lover on September 2, 2020 at 9:53 pm

    If it had been advertised as 20MHz, would it have gotten a pass? Even for the asking price?

  25. Tammy Cravit on September 2, 2020 at 9:54 pm

    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)_/¯

  26. Tomas Maliauka on September 2, 2020 at 9:55 pm

    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.

  27. HeRoìc Bane on September 2, 2020 at 9:55 pm

    *My first use of this Digital Oscilloscope is too adjust💠>**ӿ **   the duty cycle of the square wave from a 555 timer. Since there is no digital display from the timer for the duty cycle, there is no way to tell the what percent is the on or off time. The little oscilloscope makes it perfect for the job. I was able to watch the display on the scope and adjust the duty cycle to about 50%.*

  28. Rocktronroy on September 2, 2020 at 9:56 pm

    Can you make a video about the MUSTOOL MDS8207?

  29. David Piçarra on September 2, 2020 at 9:59 pm

    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

  30. Ball on September 2, 2020 at 10:00 pm

    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.

  31. TheMrjogas on September 2, 2020 at 10:02 pm

    So DSO 138 do the same for way less

  32. dutchman404 on September 2, 2020 at 10:02 pm

    How much bandwidth do I need to scope automotive Canbus and sensor signals?

  33. Gfmucci on September 2, 2020 at 10:04 pm

    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:

  34. sibsbubbles on September 2, 2020 at 10:08 pm

    Ok well sucks they bullshitted the upper end of the bandwidth but I mean…70 bucks, and consider where it’s made. For audio frequency, quick probe, see if a signal exists…etc. It’d be just fine. Comparing that thing against a 1500 dollar benchtop scope well OF COURSE that’ll blow that 70 dollar thing out of the water. Kinda apples to oranges there man.

  35. Tony Ferreira on September 2, 2020 at 10:09 pm

    For seventy box? Where?.thank you.

  36. Carlos Estevam on September 2, 2020 at 10:10 pm

    You saved me money

  37. Vasily Kudryavtsev on September 2, 2020 at 10:11 pm

    The very first question should be: if 8-bit 1GSPS ADC costs ~$100, and 500MSPS ~$75, how can they sell the complete devices at $70?

  38. 302VideoGates on September 2, 2020 at 10:12 pm

    Has anybody used this for measuring AM and SSB waveforms in the HF spectrum?

  39. Daniel Horne on September 2, 2020 at 10:12 pm

    wanted to see if it would handle 240v ac 50hz but what i seen he tested it up to 20 odd mhz id never use a portable one this high anyways

  40. Md. Mostafa Khan on September 2, 2020 at 10:13 pm

    Still better than other scopes at that same price range?

  41. АС СВЕТ on September 2, 2020 at 10:14 pm
  42. Steve Tobias on September 2, 2020 at 10:15 pm

    I had one of those older white ones and it took about 3 to 5 seconds to generate a test from a board I was testing. I sold it much cheaper than I bought it for and purchased a Siglent Bench Scope. Just a beginner model but much better than I had 💫

    25% way through, I’m waiting for the fail button… wahh, wahh, wahh

  43. Desirable Jodie on September 2, 2020 at 10:15 pm

    So any suggestions for a better mobile scope? And don’t recommend the Hantek bc I had it and its mm part is sh.

  44. timotheus things on September 2, 2020 at 10:16 pm

    how does it compete with the dso pro ?

  45. Lenny D on September 2, 2020 at 10:17 pm

    Dave, I do a lot of car audio work and want a decent little oscilloscope just for setting the gains to make sure I’m not clipping. Even tho this one is basically trash, would it be okay for my needs?

  46. Frickin' CC deVille on September 2, 2020 at 10:19 pm

    Press the mode button to see the grid on the stored waveform.
    I just got this thing this week and it’s amazing, can’t ask more for $70
    You went full on sperg on this little inexpensive scope lol

  47. BearScience-ru on September 2, 2020 at 10:21 pm

    Can you recommend something better, may be more expensive, but better and still mobile ? Which i could take with me …

  48. Frank Pitochelli on September 2, 2020 at 10:23 pm

    That’s all you’re gonna get for 70 dollars.!!

  49. عبد الكريم محمد on September 2, 2020 at 10:25 pm

    Can i test ac maim 220v directly by this device
    If not what i have to use or to do to do that???
    Thank you

  50. Wiktor Tomanek on September 2, 2020 at 10:25 pm

    12:50 I’ve got the old Russian scope and it has sort of built-in probe and it has hardware attenuation with switch.

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