180 MHz?! FNIRSI DPOX180H Digital Phosphor Dual Channel Handheld Oscilloscope Review/Teardown 

Kerry you are usually shooting half a million outcof my league with gear. But in this case you have honestly reviewed gear many of us can only afford. A heartfelt appreciation and mad respect for the reputation you deserve on YT.

Thank you Kerry. I'm on the fence on this scope. Thanks for your time and knowledge.

Thank you for reviewing!

Kerry thanks for professional review

Thank you for a great review.

Yet agian, great video sir, very informative, thankyou.

i think that the cornerstone or even the central pillar of any discussion about test equipment is "COST" as that defines the very nature of what you your going to get and at this price this hand held unit is brilliant !

Thanks bro!

good review, I must have a slightly newer version than the one you tested, i was able to save settings as default, which removed that power on default annoyance for me. I also agree with everything you said and did. great work.

Thanks

Very nice little scope. 🥳 When the cheap hobby 12 bit oscilloscopes start flooding the market then I will get one. 😎 Thank you for the great video.

Kerry, can I ask you to add another great test to your bandwidth tests? If you have a signal generator capable of outputing a correct square wave with a frequency of tens of megahertz, then as a rule of thumb the oscilloscope under test should correctly display this signal at a frequency of up to 1/10 of its bandwidth. If the declared bandwidth corresponds to reality, then the square wave will be displayed correctly with a flat top/bottom without spikes, over and undershoots. It would also be great to see a comparison of all the oscilloscopes you currently have in this test, especially very cheap ones.

You R "The Signal Whisperer".. KW. I like it along with it's low low price. I do wish units of this type could squeeze in some "analog style" control knobs... especially with "menu challenged" features. Thank you for the video... Cheers from So.CA.USA 3rd House On the Left.

On some high frequencies this scop's capture reacts on user hand movement, at least with supplied probes.

Excellent review Kerry and do you know what ? well, at less than one hundred quid I think I will look at this further as it seems like a good thing to have around at that money. Will you review it some more ? I don't have any questions straight off the bat but will come back and post them if I do...cheers.

I was hoping you would do a review on this scope. Most people don't understand just how important Digital Phosphor really is. Very exited at this price point, it makes a great little entry for the hobbyist. I hope Owon comes out with one to counter, as I almost picked up their latest one, with the DMM and better signal gen built in. Digital phosphor in THAT scope would be a dream!

Hi! Awesome video! Looking for a sub 200 portable oscilloscope, which one would you say is the best of the bunch? It seems there are more than a couple of options

It seems like a good oscilloscope, but many users keep complaining that it doesn’t work for digital measurements or for simply measuring square waves or complex waveforms because the vertical lines disappear. Fnirsi has already released a firmware update to try to fix the issue, but it seems like the problem still persists. Many claim that it is normal because it is Phosphor, but it seems inconvenient for square waves

I bought a FNIRSI 1C-15 single channel handheld scope about a year and a half ago and it was very useful. Then bought a DSO2512G dual channel handheld scope at the start of this year, only because FNIRSI didn't have what I wanted. It's been very useful but very tempted to get one of these. As a simple hobbyist, not sure I need one, but I quite like their products. I have no need to measure a 180MHz signal, but that's not the point is it 😊

Suitable for measuring components (all) types of coils (transformers), especially high frequencies (determining the point marks), but whether the Duty Cycle has been updated (becomes higher) than before, I'm not sure (especially cheap class Oscilloscopes).

Dave Jones did a review and teardown of the FNIRSI DPOX180H 180MHz DPO just recently, and interestingly enough, the one he has had a different front end. Most of it looked the same, but there was a shorter chip in the center, and they added a group of six VHF/UHF transistors after that central chip. Wonder what the changes are doing? His seemed to have major issues with signal stability. I wonder if they did a cost reduction, or what.

Hi I just bought one an the review was very helpful. Do you think that it would be possible to upgrade the adc’s or anything else on it. Thank you

There is a menu option to save settings.

Kerry, I have this scope now. It works pretty great for the price but I'm seeing one odd thing - measured voltages are about 200 mV less than what I measure through my multimeter. For example, the scope reports a Vmax of 5V for a 5.2V DC supply. Do you see anything similar with voltage readings? I believe I have the 10X probes probes properly compensated and I've run baseline and system calibrations from the menu. I'm not sure if my device has some drift or if it's something else I'm missing. Would you mind checking this out if you get the chance? Thanks in advance!

At last someone do bw test with proper termination, thanks!

Lots of buttons, but few needed ones. There is a big error in measuring RMS with this oscilloscope, both in DC and even more inaccurate in AC input mode. Supposedly it can be fixed by replacing (increasing) the input capacitor; about 0.1 µF is needed. And at a frequency of 1 kHz and a sweep of 5 ns, a “bug” appears - a phantom signal, you can check it on the meander. On large sweeps, the oscillogram is drawn from the opposite side. You can catch single signals and compare them with another oscilloscope. Sensitivity at 5 mV was not tested. In two-channel mode, the in-phase consistency could be checked. It is not reliable, but there is an information that with the Zeeweii DSO3D12 at frequencies from 5 MHz it is already visible, and at 25 MHz it is already clearly visible how the phases in the channels diverge on a sinusoidal signal. Don't you have mobile oscilloscope manufacturers in America? Why do you need these crooked Chinese?

bench version larger screen would be nice

Yes, I got this. Cheaper than a benchtop scope, no worries with earth grounding loops like a normal oscope, and at least they are not lying about their basic bandwidth claims. It seems they capable of learning and improving. Now they just need a better brand name XD Big annoyance is not remembering settings. I want to be in 10x/AC by default when I turn it on (least chance I can damage anything / get full bandwidth), but that has to be changed every time... a firmware patch would be nice. Being able to divide the sig gen amplitude from 0->1V wouldn't hurt, feels another half-effort feature added on for marketing.

About ten years ago, someone told me that the actual manufacturing price for any device whether a computer mouse or TV in China is about 50 cents but you will never get that price as a consumer or even as a wholesaler. That's how the manufacturers keep the price super low. Also there maybe some geopolitical elements, for example, instead of making huge profits (they still do anyway), China decides to help the world with both cheap and high tech products at very reasonable prices, so the whole world can enjoy, as opposed to the American model where you have to wait 20 years to buy (if you have money) a second hand product as evidently shown by the look of your lab equipment.

ölçümleri veya enerjiyi veya sinyalleri, üçboyutlu olarak algılayabilmeye veya düşünebilmeye yardımcı olabilecek bir cihaz olarak düşünüyorum❗ keşke ekranı daha büyük olsaydı 😊

You said in the video that there is no data about the memory depth. On Fnirsi's page, the parameter is among the pictures. There is something called "storage depth 120Kpts".

This is a great unit, but I would say that the sample rate is a bit insufficient for "actual" 180 Mhz. You get ~2.5 sample points per wave cycle, which, yes, is above Nyquist frequency, but typically you would need 4 or 5 samples for a somewhat-accurate waveform reconstruction, so it's quite possibly doing heavy sine interpolation. There's many scopes out there with 2x the sample rate (1GSa/s) yet they barely claim 100Mhz bandwidth, which makes the 180Mhz rating a lot more suspicious. Having said that, being able to capture and show a wave anywhere near 200Mhz is WILD for this price range, even if it's not accurate in amplitude or features. Regarding frontend gain, I can't tell hardware-wise, but I wouldn't discard the device having some software gain adjustment to compensate for "expected" attenuation as frequency increases, because in my tests I also observed an increased amplitude as frequency went up, which is kinda the opposite of what happens in my other scopes. I truly appreciate the in depth review and teardown. I was eagerly waiting for someone with more experience and more adequate gear than what I have, to review this product.

this fnirsi first good fnirsi

I think @7:30 the bandwidth is not actually usable, as the sample rate appears to be insufficient, as observed by the obvious jitter.

Hi. If you save the settings, you will not lose it. You need to save the settings for this little device... 😀

how to set the sensitivity on ch2 when both channels are activated?

Banggood says "Due to policy reasons, this product does not exist " so ur link not working

А если разобрать аппарат и посмотреть на элементарную базу, тогда всё встанет на свои места. Подумайте.Запустите модулируемый сигнал и проверьте истинность показаний. Пока это игрушка, а после устранения недостатков имеет место быть для простых радиолюбителей. Для профи-это игрушка.

I have the DSO2512g, is this better? Should I upgrade? I use to measure audio signals for sound system alignment

Why doesn't my DPOX180 turn on after only a month? Didn't anyone happen?

It easily outperforms the FRNSI 1014D

Dpox180h or hds2102s/hds2202s? No matter price

500 MSample/s is considered as 50 MHz analog signal.

Can it do fft?

Instant regret buying this. It doesn't even remember the probe scaling after a power off. No-one in their right mind would design a 'scope that remembers nothing between restarts. Totally impractical for any kind of real work. And the ZT-703S has a much larger display. Why don't youtube reviewers actually try to use the stuff they review?

Fnirsi is famous for lying about specs and using equivalent sample techniques! You should test 5ns horisontal in single trigger mode with random signal, compare the capture with true high sample rate oscilloscope.

250-500 megsamples, and 180 MHz rated... lol

So much background noise in earphones .. you might need a notch filter

An oscilloscope is not an indicator. It is a measuring tool, so "a bit of non linearity" will prevent a normal person from calling this contraption an oscilloscope.

I always look at FNIRSI with DEEP suspicion, they LIE a lot! I hope you do a SINGLE SHOT TEST because you ALWAYS fail to do this, ...please do!!!!!!!!!