Zeeweii DSO3D12 ⭐ 2Ch 120Mhz Osciloscope + Multimeter + Function Generator

[@transmitterguy478]

I received mine today12-30-23. I paid $84 US for it (Ali Express) and was excited to test it. After I read the manual and tried calibrating the probes I noticed no signal on channel 1. I tried ch 2 and had a signal. I removed the case and disconnected the battery for a while and when I plugged it back in ch 1 was working😊 One thing I was confused about was the microphone inside the cabinet, what is it used for? I have been an electronics tech for 55 years and love buying new stuff. Great video I learned some new things I haven't tried yet, thanks.

[@TechCornerTV]

Hi, I made a second video about this model ( kzbin.info/www/bejne/b5TFfGillJx3bLc ), take a look in it and you will be surprised 😁 Thanks for watching.

[@HetalAcharya]

what is a microphone doing in a oscilloscope !

[@Electrorem_]

В этом осциллографе есть голосовое управление​@@HetalAcharya

[@waselhousami]

Hello can you tell what is the max frequency wave can generat

[@geoffmorrison3648]

Some info on the FFT which is not in the manual. I have derived this by experimental observation. 1. In all three modes the frequency axis (horizontal) is linear and ranges from 0 at the left to a frequency determined by the timebase setting. That frequency is 25 divided by the time per division and holds for all timebase settings not faster than 500ns per division. So the extremes are 10s per division which makes the range 0 to 2.5Hz and 500ns which makes the range 0 to 50MHz. Selecting 1ms/div gives 0 to 25kHz which may be appropriate for audio. 2. In the music mode, the amplitude response (Y axis) is linear. 3. In log(arithmic) mode the vertical axis is NOT 10dB/div. Looks like each division corresponds to a factor of 8 times larger or smaller. (Maybe some simple mapping from the binary numbers.) The absolute levels are related to the Volts/div setting in a simple manner. The penultimate line from the top is reached when the RMS value of the input sine wave component at that frequency is equal to the Volts/div setting. For example, if the input is 200mV RMS and the sensitivity is 200mV/div the spectral line will reach the horizontal line below the top one.

[@TechCornerTV]

Hi Geoff, thanks so much for taking the time to update us with this information. Really appreciate. Sorry for this late reply, I'm trying to keep up with the coments 😁 thanks for watching!

[@bobisyouruncle1]

Hi - can the signal and FFT(linear mode), be moved further apart, so they don't overlap?

[@MichaelBen-Yehuda]

Thank you for another great review and focusing on this exploding lower segment of the market. o-scope features are mostly software driven these days and as amazing as they are it's quickly become an expected standard. It functions well with its imbedded CPU. For some of us older techs, seeing X and Y cursor measurement in a tool at this price point is a mind bender. On the other hand, there are some limitations to be aware too. Some you point out, and some are more subtle but may also be important to consider. The FFT function has NO MATHs or analysis. It's pretty much useless beyond very basic interpretive stuff. If you need FFT, this isn't the tool. Limited storage depth. Especially in 2 ch mode, it's a very small buffer for the bandwidth. You mentioned the ability to save, but said screen shots, not scrollable buffers. If thats the case, it's a severe limitation. Was the reference signal also a screen shot, not a buffer? Of course, not being able to transfer the saved data to another device is also an issue. I think by now people are aware that these low end scopes have only a single shared 2 port ADC. 82 Mhz bandwidth single channel is about 38 Mhz dual channel. For most use cases this is more than sufficient. What needs to be discussed is the "other" speed parameters, Sample Rate, and Screen Display rate. Sample rate limits your resolution and display rate, the ability to see spurious changes. If you want to test a scope's bandwidth and speed, instead of pushing your signal generator to its max 100 Mhz sine wave, generate a PWM square wave, lower the duty cycle and look srthe pulse. 10Mhz with 5% duty cycle = 200 Mhz pulse width. So with all these similar products how do you discriminate value and which to buy? Value = what features add cost to manufacture these products? Is it reflected in the price? Display- 2.8 TFT vs 3.5 IDS vs 7" IDS or TFT( + touch screen?). A big cost differentiation here. 3.5" is 50% larger than 2.8" IDS has better viewing angles and contrast. 7" is 300% larger than 3.5" Dual ADCs a 50Mhz Scope with 2 ADCs is like a 100Mhz scope that shares the ADC across 2 channels. Math functions FFT and serial decoding. Decoding is particularly useful. Logic analyzer functions. You can buy a USB PC based LA for under $30. For casual use, they work! But decoding a couple of channels might be all you need. Check sample rate, display rate and buffer depths. 1G Sa/S and 100,000 wf/sec, 8 or 16 Mb buffer means fast internal components, large storage, and it drives cost up. This is the difference in entry level vs professional tools. Multimeter- adds cost, but how much depends on quality of meter. All scopes present basic voltages. Adding a Multimeter means another ADC is needed. Would it be better to have a 2 channel 2 ADC scope instead of a very limited Multimeter? I think so. Note, some Multimeter add ons are very precise 20,000 count true RMS. They are expensive, but do you need that precision in a combo tool? Don't get trapped in bandwidth/spec marketing hype. Do you need a true 200 Mhz x 4 channel scope with AWG, Full FFT math and decoding? On the other hand, some brands are stripping out useful features to drop the price point in their new models to meet the new competition. Yes, some basic sig generator is very useful even if it's not a full AWG and decode in a 2ch scope is too, not to mention outrageous add-on pricing, (Rigol). Which to buy? Determine your needs and likely near future needs. Match needs to product specs, perhaps multiple products are more cost efficient and user-friendly than looking for a one box does it all solution.

[@TechCornerTV]

Hi, this was a really nice comment full useful information, thank you so much for your trouble and time. As you probably know, I'm not a professional in electronics, my professional life is programming and system administration, but these days mostly team leading. Electronics is a passion I have and I have the luck and the knowledge in how to approach companies in the way they collaborate with the channel and make these reviews possible. But since I'm not all day working in electronics and latelly with the time videos consume, not at all creating new projects ☹ this kind of constructive comments are so welcome for me and the other viewers. Really appreciate your effort and thanks for watching. I will try to implement some tips you gave in future videos.

[@MichaelBen-Yehuda]

@@TechCornerTV Thanks for your kind words. I hope your skills in acquiring test samples continues to provide :) It's very helpful to see these comparisons as the latest wave of new products hits the market. Generally, this new wave of small/portable gear is quite impressive, and it's caught the attention of higher end manufacturers. I think it's already started to bring prices down and features/value up in the lower end of the 7" bench-top market. I hope the trend continues along with pressure to drop pricing on high speed ADCs and LSIs needed for data acquisition, math and decoding. I think there is a real opportunity for you to provide unique value on your channel and at the same time take on some of the marketing hype about scope bandwidth (50 MHz vs 100 MHz or 180 vs 200 😉) by encorporating sample rate and waveform acquisition rate in a video discussion "about bandwidth" You can revisit some of the recently reviewed scopes to illustrate. I see it comes up sometimes in comments about (near) vertical waveform segments missing, etc. There is a gap is understanding how a Digital oscilloscope manages to capture a 100 MHz waveform using only 5 or even 2.5 samples per cycle and the concept and application of waveform averaging. It naturally leads into differentiating periodic and spurious signal types and possibly aliasing which is hard to find good explanation for in the context of DSOs That can bring you back to differentiating products and how to figure out which products will work for a particular need. How to do it in a simple way for YT I' leave to your expertise. I think you'll find experimenting with PWM waveforms illuminating as you get into single digit duty cycles. Small Switching PSUs also are a good demo. Both are good examples of why a fast scope is useful, although personally I'm usually hunting for signal presence rather than actual rise times 😁 Good food for thought I hope.

[@javiergs7498]

Thank you very much for the information, I am personally looking to purchase my first oscilloscope, I was thinking about a Hantek Dso2d15, but then I saw that the precision leaves a lot to be desired, then I decided to buy a hantek to1154d but I saw that it is still bad, it has very few options for trigger, and for 360 usd it is not worth it, then I thought about an MSCitooo4 but of course those are already +500 usd and it is a little further away... I am a student and I want it for my thesis but also to work in the future, with me If I would apply something that works for most things.... Could I ask you for recommendations of some equipment? Low-medium-medium high range?? I'm thinking about buying the dso1252G.... But of course I'm looking for the best value/price... Thank you very much for your time and if you dare to recommend something I will gladly accept it! Greetings

[@Peter-rt3tu]

What irritates me is that the voltage drops first and the rises again when switching to shorter time bases. That looks as if they knew that the analog frontend is worse than the announced 120MHz and tried to do some mathematical tricks to achieve the 3dB level when measuring sine waves in short time base settings. Which of course does not help if it i not the 81MHz sine but the 9th harmonics of the 9MHz square that I want to look at in a lower tie base setting. What happens if you measure DC, say a battery, and skim through the time base? Will there be a point where the scope shows a higher value than the applied DC voltage?

[@MichaelBen-Yehuda]

@@javiergs74981st determine your needs and your budget. If your budget is very very low and your needs are not too heavy in school, consider looking for a decent used scope at a good price that you can resell for about the same price when you need something different. In these lower end scopes, don't expect precision. For example, this scope sample rate (Capacity) is 250M sa/s using one channel only. 2 channels it's 125M. The Nyquist limit they claim is therefore 125Mhz. But reality is that an 8 bit sample results in 256 possible values or a symbol rate of 8. The Shannon limit is about 31Mhz (single channel) without considering any noise. So you might detect signal up to whatever this scope might get to, but the waveform accuracy degrades much lower. That said, these scopes are fine for basic troubleshooting , but not detailed engineering work. Aliasing and artifacts are very common. You may not need precision for your studies. Check with your professors. If you need precision plan on lab time. I don't want to hijack the comments recommending other scopes. There are a lot of good reviews on this channel. Keep researching.

[@rheynalcantara6848]

I hope that this dso3d12 unit will have an upgrade version like, 200mhz. 1gs/s.,auto ranging voltmeter, and would have a bigger in screen, this will become the best seller of the year if this will happen, I wish the manufacturers produce such kind of dso3d12, I am excited to get one with upgrade version, thank you

[@TechCornerTV]

Hi, Zeeweii is kind of the underdog, it has good devices, but not the deserved credit. Until now, I'm really impress with the devices and the price quality vs price ratio. Let's see what else they will release. Thanks for watching.

[@antibrevity]

I bought the DSO1511G based on your thorough review, so thanks for the review of the latest model. The DC voltage seems within 0.33% at its worst, so that's well within the 0.5% +- 3cnt and thus is not off and does not have small gaps. It's performing better than I would expect, actually. The AC accuracy is rated to 1% +- 3cnt and thus flawless as well. Current accuracy is rated to 2%, so it's far more accurate in your testing than that. The DMM modes are surprisingly accurate and it's nice that they chose to include these features as it makes the device a starter bench multimeter/oscilloscope for those on a budget. The oscilloscope still shows the same unpredictable variations as the older models, however, so lots of software interpolation is being done and this makes the waveform and measurements less trustworthy. It was not your fault that the voltage readings were fluctuating; the firmware is not fully reliable and can get itself confused. I still feel that Zeeweii is offering very good performance and features for the price, but I wish that they would improve waveform accuracy and stability to justify their 120MHz claimed bandwidth. However, I'm quite happy with my DSO1511G as it's nicely compact and handy.

[@TechCornerTV]

Hi, I think you really summed what I think about this equipment, is perfect, no. It's good enough for what you pay, yes, maybe even a bit over average for this kind of equipment. And if you're a hobbyist with not a lot of resources, you get 3 fairly decent equipments for a also a fair price, not much space ocuppied on the workbench. I think there is a market for this. Thanks for watching.

[@javiergs7498]

Is it better than Fifnir Dpo180X, and this??

[@marcelomigueldasilva7444]

As tensões do dpox não é confiável, mas é muito mais estável nas ondas.​@@javiergs7498

[@hugueslecorre4893]

Your review is a reference manual for me, I very grateful for you.

[@TechCornerTV]

Hi! Glad it was helpful. Thanks for watching.

[@khuongathebounga4141]

Thanks for the review Hugo. Very nice.

[@TechCornerTV]

Hi! Thanks for being alwasys here 😁 and for watching!

[@chuckvoss9344]

That is an amazing amount of technology in such a small package. Very good review. Thanks.

[@TechCornerTV]

Hi Chuck, yes it is... Zeeweii is kind of the underdog in this stuff, they need a bit more structure and I think they will have a very nice future, like FNIRSI. Thanks for watching!

[@mcomio]

Great review In your opinion, can it be used for audio(guitar amps and pedals) repair and tweaking? Im heavily into this and rather tight budget. And im talking 24kHz max Thanks!

[@TechCornerTV]

Hi, answering you question, yes, absolutely! It has support for almost 100Mhz, so it will be a breeze testing 24Khz.... thanks for watching and I hope my answer helped!

[@GiorgiPeranidze-mo2nm]

Can you please check if this device really has a voice control feature? It is not mentioned anywhere. Supposedly it is activated by pressing and buttons.

[@TechCornerTV]

Hello Giorgi, a new video will be released tomorrow with that topic and a few others I didn't cover in the first video. Thanks for watching!

[@brunorodriguesmaso]

Thanks for the review Hugo!

[@TechCornerTV]

Hi Bruno, my pleasure! Thanks for watching!

[@RensePosthumus]

Nice review. I've took the liberty to reroute the siggen output to two banajacks st the right hand side of the meter. Works much better in that way.

[@TechCornerTV]

Hi, nice hack. Yeah, I don't think the sig gen output was the best solution, but other than that, is a really nice piece of test equipment. Thanks for watching!

[@ВікторБобуський]

Good overview of the oscilloscope. I bought the same one and was upset. On my oscilloscope the meander of 1 and 2 MHz is much worse than on your device. (when connected to the built-in generator). I looked at reviews from other users. On their oscilloscopes the same as on yours - 22:36 Adjusting the probe only. changes the amplitude

[@ВікторБобуський]

😢

[@TechCornerTV]

Hi, thanks for sharing. There is always the change your device has a factory defect and needs to be replaced, try to contact with Zeeweii support and get feedback from them, my device is pretty good, is stable and accurate, no complains at all. Hope you are able to solve it. Thanks for watching.

[@RonanCantwell]

Are the DMM sockets isolated from the oscilloscope inputs? You demonstrate measuring the mains voltage with the DMM but if the oscilloscope shares the same ground, those BNC sockets could be a shock hazard.

[@TechCornerTV]

Hi Ronan, that is a very good question. I think you can't even use the DSM while charging to measure voltage, it gives you a error message, preciselly to prevent that. Thanks for watching.

[@geoffmorrison3648]

The DMM inputs are not connected to the BNC sockets.

[@recursoseninternet]

I have a general question about oscilloscopes because I am in the phase of choosing one to start with: what is the recommended minimum sensitivity value? I mean, I have seen oscilloscopes with 10mv/division or 2mv/division and there are even more expensive ones with 500uv/division, and I am confused about this and do not know what would be the recommended minimum value to use in electronics

[@khuongathebounga4141]

It really depends on what you want to use the scope on, what kind of voltages you will mainly be working with and also the bandwidth. For myself where I work with automotive circuits 2mv/division is more than adequate with the voltages that I work with. I believe most modern scopes now have between 2 to 5mv/division which should cover most things. You also need to remember that when you use it in x1 or x10 probe attenuation it will also change the sensitivity. So if you have it in x10 it would change a 50mv/division to 500mv/division. Since x1 attenuation is usually limited to 6mhz bandwidth you will need to keep this in mind too. If you are a hobbyist and want to use it on things like an Arduino, 2mv-5mv is perfect but even 10mv should be fine. Hope this helps you.

[@recursoseninternet]

@@khuongathebounga4141 Thank you very much for your help and advice.

[@TechCornerTV]

Hi, @khuongathebounga4141 already gave you a very nice answer, I agree with him. 5mV to 10mV will cover you in most of the cases, you need to think about in the bandwidth that you'll need to analyze the components you're working with. 100Mhz should cover you for almost everything, but smaller bandwidth should be ok also depending of what you're measuring. Thanks for watching.

[@fabiens4083]

Thank you for this informative video. I am particularly interested in setting up a circuit with a filter using the generator function of this oscilloscope. The generator output is at the top of the device, but how do you connect this to a bredboard type card for example ? Because the cable provided is BNC type on one hand, and rectractable hook at the other hand. Regards

[@TechCornerTV]

Hi, you can use a alligator clip to dupont or something like that to use the function generator output, or insert a pin (the remaining wire of trough hole resistor for example) and use a alligator to alligator cable, something like that. Thanks for watching.

[@fabiens4083]

@@TechCornerTV Thank you for your reply. I am also thinking finally of using a cable with two hooks at the ends and one of the hooks will be connected to a thin wire whose other end will fit into the breadboard.

[@goatmoag]

Congrats. I think you beat everybody for first review in english. Thanks for the review. To bad there isn't a zero setting on the meter. Would have been nice to see the performance of both channels as well hz signal performance (mine had trouble locking on getting a read I think). Did your device come with any peel off labels or screen cover? What did you think of the voice commands? I've been waiting a long time for a friend, let alone one that will listen, talk to me and do what I ask of it and now I have one.

[@TechCornerTV]

Hi, I have it here for a month for review, with moving to the new house and new lab, my life right now is a mess, only had time to review it this last weekend and took me 3 complete days to record and edit... argh... answering to your questions: It didn«t come with a plastic protection on the display, but it is really well packed stuck in foam and a plastic velvish plastic bag. You're the second person talking about voice commands... did I miss something? Thanks for watching.

[@TechCornerTV]

I went back to see what is going on with voice commands and found a Zeeweii video. There's nothing in the manual mentioning it and I try to see less videos possible of a equipment before doing a review to avoid being influenced by other opinions. I saw it, I tested, it works but without the commands listed has basically zero utility, but it is inovative and kudos to Zeeweii for implementing it, frees your hands.

[@goatmoag]

@@TechCornerTV Yeah, the only way to get the commands is that video. At least some of them.

[@goatmoag]

@@TechCornerTV Thanks for the reply. I thought maybe amazon sent me a used unit since there wasn't any film over the screen. Looks like a bunch of fine scratches all over too which doesn't make me happy. Maybe they should leave the film on. Thanks for all the work in the vid and hope you get moved alright. I hate moving so I feel for you.

[@jst6502]

Hi, I had this unit with firmware 3.03 and there was a weird issue with the dmm AC V reading being different depending on the direction that the probes were used when measuring HVAC 24 VAC. One way read 27V and the other read 4V. Firmware 3.05 seems to have resolved the issue.

[@maharbatc]

In the calibrator test, the zeeweii is more acurate than the siglent, and the difference increases with voltage, except in 6 volts

[@TechCornerTV]

Hi, that's something I noticed in this small devices is that they are accurate in some range and derail a bit in other ranges, like if is really accurate in mV in volts tend to be a bit off, or the inverse also. It's rare to nail in every range. Thanks for watching.

[@jfbaquero]

Great video! Is the function generator signal voltage output fixed? Or can you define the Vpp?

[@TechCornerTV]

Hi! I don't use this on a daily basis, but I think it's fixed. Went to see the video and didn't saw a place to change the amplitude. Thanks for watching.

[@geoffmorrison3648]

It is fixed amplitude.

[@steveb936]

Thanks for the video, how long it the battery life ?

[@TRONMAGNUM2099]

Thanks for the great review. This looks like an excellent value. I will order one this weekend.

[@TechCornerTV]

Hi, hope you enjoy it you new unit and hopefully you used the affiliate link 😁 thanks so much for your coninous support!

[@yaimelreyesespinosa9718]

Great teacher. Thanks you.

[@TechCornerTV]

Hi, thank you so much for watching and your nice comment. Really appreciated. Take care.

[@Latvian3Dman]

Thank You for video. Interesting thing, interesting "compromise" form-factor too.

[@TechCornerTV]

Hi, glad you liked it! I totally agree with you. Thanks for watching.

[@nderezic]

Does it support pulse trigger?

[@endiz]

I'm trying to decide between the dso3d12 and zt-703s. Assuming they are the same price, which one would you get for a hobbyist diy'er that will only use the oscilloscope functionality for troubleshooting retro products?

[@TechCornerTV]

Hi, I'm recording the review this last 2 days of the ZT703S, the screen is awesome, a big 3.5 inches TFT, but really struggling with auto and lowest time division, my unit can't go under 100ms and I saw others in videos go down to 10ns... don't know what is going on. At this moment, 3D12 all the way. Thanks for watching.

[@maksshark]

@@TechCornerTV In my opinion, you need to set the generator to the default setting and there will be a choice

[@jachencarl]

Thank you Sir for your in detail description on this superbe little instrument. Unbelievable all the possibilities at such price. One question left: Is the Amplitude of the function generator fixed at 2.5Volts?

[@TechCornerTV]

Hi, so nice of you. I reviewed some time ago, but I believe it is. Thanks for watching.

[@mumbles1justin]

Great review. What were they thinking shipping 100mHz probes with a 120MHz scope. I honestly have never heard of any oscilloscope being shipped with under rated probes. Even less expensive units come with properly rated probes. Id guess the issue with you were seeing 18:15 was partly do to the probe bandwidth being inadequate. Im curious what the same test with 150 MHz or higher probe would have shown.

[@antibrevity]

No, Zeeweii's firmware/hardware is glitchy at higher frequencies and shows unpredictable measurements. This is common across their product line and has nothing to do with the probes. I have the DSO1511G and while it's a great value, you cannot trust its waveforms and measurements at certain frequencies, probably due to interference between clock/sampling speeds and the waveform frequency. Though Zeeweii's bandwidth is substantially better than similarly-priced competitors, they are *not* 120MHz scopes.

[@TechCornerTV]

Hi! I don't think that is the problem, but that's a very nice point that I totally missed in the review and the previous ones also, good catch! Thanks for watching!

[@johndevires5911]

At 17:06 you used 100Hz into the scope.😉 Nice video btw, thank you very much.👍

[@TechCornerTV]

Hi John, you're right... what a miss! Thanks for noticing and for your nice comment. I hope it overall was useful to you. Thanks for watching.

[@johndevires5911]

@@TechCornerTV Well, you did convince me to buy one of these models. Thanx again. 👍

[@ImyaFamiliya-kl3op]

Спасибо большое за обзор!!! Очень понравилось. Thank you very much!!!

[@TechCornerTV]

Hi, thank you so much for your kind comment. Really glad it could be useful. Thanks for watching.

[@omniyambot9876]

Thanks Hugo. Fnirsi 1014D or This?

[@wp-wisdom]

Definitely fnirsi 1014d

[@TechCornerTV]

Hi, you're welcome. Answering your question, both oscilloscopes, but totally different products. FNIRSI 1104D is a benchtop oscilloscope with a 7" screen with amazing image quality. This one has very nice image, but the 3.2" display is per it self, a limitation. Curiosly enough, it has more features than FNIRSI 1104D 😁, so it depends on how portable you want it to be and if you can leave with the small screen. For a small oscilloscope, is pretty good. Thanks for watching.

[@antibrevity]

I would *not* recommend a 1014D. Though it's a great idea to remove the power supply to save money (Rigol is now doing the same), the 1014D performs quite poorly for the money. However, if you can get one for around US$100, it's probably a good value. There was a time when the 1014D was selling for US$200 and that's just insane; buyers had to be ignorant to pay that much when they could get a real scope for $230 or so :(. The 1014D is worth a hundred bucks, IMO. The display is nice, but you should be saving a lot of money to accept the USB-powered form factor (no battery) and questionable performance. Save up for a real scope, even if you have to buy it used ;). As FNIRSI has improved its products substantially over the past couple of years, I'm hoping that they introduce a newer version of the 1014D that's truly competitive with low-end offerings from Rigol and Hantek. FNIRSI is an exciting brand to watch, but the 1014D is *way* over-hyped and oversold. It's popularity is sad.

[@MichaelBen-Yehuda]

I agree, the 1014d is a poor choice right now. It has 1 shared ADC and it's internals are all quite slow so it's not even in the same class as a real 7" bench-top scope. Rigol went too far stripping out features to hit their $300 price point with the 8 series IMHO. Dazzle us with 12b ADCs 1.5G sa/s and 1,000,000 wfa/s deep buffers and 7" touch screen but drop basic sig gen for calibration? No decoder? 😢. Keep in mind the 9 series and you must buy 4 channels to get the LA port. Oh, and the add-on cable for the 8 series is $200 and for the 9 series $500. They're playing games. Honestly, Hantek 7" has my eye for value right now. Decode and Math included. 😊

[@omniyambot9876]

@@antibrevity thanks for a very detailed response and your advise. I actually have researched this well and aware of your points. FNIRSI is available in my country for lowest $120 (I wish it was 100). I love $200 scopes but to give you an idea, I'm just a low class 3rd world Engineering student. $100 alone was half of my full-time salary. So this is a big decision and I can't buy those expensive scopes yet. But this ZEEWEII is also close to FNIRSI's offering that has a standard form factor. Yes 1014D is not that great but is this any different? I dont want the DMM functionality it's redundant. And although I do upto 200kHz switching analysis, I'm not particulary in need of a very accurate scope anyways. This is why I'm asking what's actually better buy? Cause I'm also liking this one.

[@Piasecznik72]

Continuity test highly depends on test probes. Please try with good quality golden plated test probes. UNI-T 61E you have will show you world of a difference with poor and good quality probes. One thing missing is work time on battery.

[@TechCornerTV]

Hi, on the product information, says it can work more or less 6 conitnous hours. Regarding the probes, I test with what they will send you, I understand what you say and I even have here my Rigol 350Mhz probes, but that will not be what the average Joe will receive when buying this. But I do understand and agree with what you're saying. Thanks for watching.

[@selcuk.kabadayi]

Does it has a PC connection feature? Some cheaper models has this feature so I'm curious about it.

[@TechCornerTV]

Hi, it was reviewed some time ago, I might be wrong, but I think you can take the images to the PC with the USB connection. Thanks for watching.

[@NoferTrunions]

True RMS, does the DMM have?

[@jeffersonavila7275]

Is the ac voltage meter a true rms?? In what hz does the reading goes off for ac voltage?

[@TechCornerTV]

Hi Jefferson, sorry the late reply, trying to catchup with all the comments in delay, yes it is a TrueRMS multimeter. Thanks for watching.

[@arp_catchall]

Very helpful, thanks.

[@TechCornerTV]

Hi, thank you for your nice coment and for watching!

[@thevintageaudiolife]

This is what i need! rather than lugging around an 80 pound old Tektronix scope that might blow up any min day now.

[@TechCornerTV]

Hi again, this one, for the size, price and features, is one of my favorite small oscilloscopes. If you haven't yet, take a look on the second video where I show the voice commands of this scope. Thanks for watching.

[@nicolasdejesusmunozpalomin388]

Are the function generator signals audible?

[@TechCornerTV]

Hi Nicolas, I've been "earing", better yet, reading some comments that say that you can connect the output to a speaker and you'll be able to ear the rhythm of the signal. Thanks for watching.

[@andyweekend4096]

Hi hugo , does the voice assistant actually works

[@TechCornerTV]

Hi Andy! What do you mean with the voice assistant? Thanks for watching 😁

[@TechCornerTV]

I went back to see what is going on with voice commands and found a Zeeweii video. There's nothing in the manual mentioning it and I try to see less videos possible of a equipment before doing a review to avoid being influenced by other opinions. I saw it, I tested, it works but without the commands listed has basically zero utility, but it is inovative and kudos to Zeeweii for implementing it, frees your hands, but it seems to work, but we need a command list, can't go back to zeeweii videos everytime you need to know a command.

[@dbehterev]

Спасибо за обзор! А существуют ли подобные варианты на рынке где также есть функция измерения индуктивности?

[@TechCornerTV]

Hi, sorry the late reply, trying to keep up with the comments, not easy. That I'm aware, no. Inductance normally is very rare in a multimeter, there a few with it. Is more common in LCR measuring devices. With oscilloscope integrated I don't know any. Thanks for watching.

[@sp_charles24]

Thank you very much for reviewing every features of the ZEEWEII DSO3D12 Oscilloscope. I'm a beginner level laptop repair man. I prefer to start with a normal oscilloscope that would somewhat help for my purpose. Therefore, I'm searching for an oscilloscope to serve the purpose of testing the signals generated by the laptops to diagnose the fault. In considering this, is ZEEWEI DSO3D12 suitable for my purpose as you mentioned it is accurate in measuring frequencies upto 82Mhz (P-eak to P-eak). Will it be reliable for long usage that measures frequencies upto 82MHz without jerks. Just need an advice on choosing this product.

[@TechCornerTV]

Hi, well, this was just released, I can speak for the long run. But generally speaking, I have a pretty good impression of Zeeweii products. I think they're a bit of the underdog here, you'll be well served. Thanks for watching.

[@sp_charles24]

@@TechCornerTV Thank you

[@ashrafkarjiker6888]

Is the XY mode the curve tracer to test components in circuit like capacitors etc

[@TechCornerTV]

Hi, not qualified to answer that, maybe our friends in the channel can give you a better answer! Thanks for watching.

[@geoffmorrison3648]

No. You need external circuit. Search for "octopus tester".

[@wowa322]

which is better dso2512g or dso3d12g?

[@TechCornerTV]

Hi, this is only a personal preference, for me, I don't need the multimeter functions and I like more the DSO2512G format, so, personaly I will go with that one. But if you're starting and don't want to invest much, this one makes more sense since you'll have the multimeter, the signal generator and the oscilloscope. Thanks for watching.

[@valveman12]

Thank you for the review...

[@TechCornerTV]

Hi, thank you for your nice comment and for watching!

[@matteoricci9129]

Can you save images from usb? Can you load a custom waveform?

[@TechCornerTV]

Hi, not sure about the download of images using the USB, I think it's possible, not sure, but I'm sure you can't load a custom waveform in the terms of you creating one and then using it on this device. Thanks for watching.

[@paniaguainversores5335]

Excelente explicación Clara y precisa

[@TechCornerTV]

Hola, gracias por tu lindo comentario y me alegro de poder ayudarte. Gracias por ver el vídeo.

[@Igor_user]

At 26:04 of the video, frequency 100 kHz, is there already a phase difference?

[@TechCornerTV]

Hi, yes it is, but to be fair, I'm not sure if the phase was aligned on the signal generator. Thanks for watching

[@Igor_user]

@@TechCornerTV , Could you check the phase alignment on the generator and this osciloscope?

[@tiger.R.lamboy]

Thank you very much

[@dude8586]

What is the resolution of the frequency meter?

[@TechCornerTV]

Hi, I think I left that info in the key features. Thanks for watching.

[@uni-byte]

Nice review! On the BW test I would recommend two things. 1) Don't use a probe. They have bandwidth limits (especially these cheapies) and this will strongly affect results. Instead, go straight from your 50 ohm signal source to the scope using a 50 ohm coax cable and a pass-through 50 ohm terminator. This will take the any probe inadequacies out of the test and should be good for tests up to 1GHz. 2) If 100MHz is the limit of your Owon, it is also likely to be 3dB down. So instead of using it at it's limits, get (or build) a 50 ohm source impedance fast rise-time oscillator which can be connected directly to the scope input using a pass-through 50 ohm terminator. Leo Bodnar Electronics has one with a sub 40 ps rise-time that will allow you to test the actually BW of scopes up to the 10s of GHz for about $100. A lot cheaper than a 10GHz function generator and well worth the money.

[@TechCornerTV]

Hi, those are very nice tips & advices, thank you for taking the time to write them down ❤ I already took a look in Leo Bodnar Electronics, I think in the past I already passed through his site. I will order one of those fast rise 30ps signal generator. Thanks for watching.

[@marcelomigueldasilva7444]

Pensei bastante e acabei de comprar o dso2512g, só por causa da bateria de 4000. O fabricante não poderia ter colocado 2500 nesse. Lamentável! Há outra coisa, algumas funções nele não funciona com o cabo usb nele. Será que o dso2512g acontece o mesmo?

[@TechCornerTV]

Olá Marcelo, o DSO2512G é muito bom, vais ficar muito bem servidor. Apenas em defesa do DSO13D12, o fabricante é o mesmo e tudo depende do consumo do aparelho. Se consumir menos, provavelmente não necessita de uma bateria tão forte para funcionar pelo mesmo periodo de tempo. Obrigado por assistires.

[@marcelomigueldasilva7444]

@@TechCornerTV obrigado pela resposta, mas esqueci de comentar que o dsi2512 é bem mais barato. Multímetro eu já tenho e frequência eu trabalho com 72mhz para trás.

[@cg125fimotoge6]

このオシロのスクリーンショットはPC接続で見れますか?

[@TechCornerTV]

Hi, yes you can. Thanks for watching.

[@victoruzhos856]

I like this device. But I don't like the fact that it doesn't meet the stated parameters. What prevents the manufacturer from writing that it works up to 75 MHz? That would be fair.

[@TechCornerTV]

Hi Victor, you're right and it is more or less common in these chinese devices, so that's why do my comparations between these devices of the same price range. Even so, I should say it is a really good peace of test equipment. Thanks for watching.

[@velojeer]

Полоса пропускания 57 MHz по уровню минус 3 dB!

[@MartyM.]

I appreciate you reviewing this. I'm really not sure if I'll get one because of the lack of PC access to measurement snapshots. I read on a forum that a guy contacted Zeeweii and they verified you cannot retreive stored snapshots as image files like some others. I definitely will need to somehow get waveform snapshots so I don't understand why they didn't provide that feature. Frustrating. :(

[@TechCornerTV]

Hi, I have direct contact with them and can ask, but don't think so. My PC due the reviews I do, as already all the common drivers used by these devices, normally I just have to connect and it is immediately detected. The USB sound in windows appears, but no drive is added, so no access. But I will try to figure this out. Thanks for watching.

[@christianbubu373]

Thank you for this video. Is manual adjustment of the trigger level possible? You don't explain anything about it. Thanks for your answer.

[@TechCornerTV]

Hi, yes it is. You just have to change the "cursor" to the trigger and manually move it up or down. I think I've showed, but if I missed, I'm really sorry. But yes, it is possible. Thanks for watching.

[@maksshark]

and which is better, it or DPOX180H at the same price

[@alickkk]

52:41 - this ic is "AI Intelligent Offline Voice Recognition Module Offline ASR Voice Control Bluetooth Voice ..."

[@TechCornerTV]

Hi, yes you're right. On the first review video, I was not yet aware of it, I have a second one where I test it. Thank you so much for sharing and watching.

[@yunusulusan4342]

Hello, thank you very much for the information you provided in the tutorial. Can you please add Turkish language in your videos to benefit more.

[@TechCornerTV]

Hi, I would if I knew Turkish, but even so, I don't have the time, don't get me wrong. I have this same channel in Portuguese, my natural language and I had to quit making videos to that channel because of lack of time. But youtube creates automatically subtitles for most languages, you should have it too in Turkish. Thanks for watching

[@KPsTboy]

I'm not that tech savvy, but how can the measured vpp drop or rise by adjusting the timebase 😯

[@TechCornerTV]

Hi, good point there... thanks for watching.

[@MichaelKingsfordGray]

Does it have XY capability?

[@TechCornerTV]

Hi Michael, it's one of the video chapters on minute 25:51 - XY mode. Thanks for watching.

[@MichaelKingsfordGray]

@@TechCornerTV Thanks! I bought a Hantek scope anyway. 250MHz. 4ch.

[@TechCornerTV]

@@MichaelKingsfordGray250Mhz 4Ch, seems good, they have some new equipments that seem to be pretty nice. Whiich model you choosed? are you satisfied with it? Sorry all the question 😁

[@ben12804]

Can You download screenshots from it?

[@TechCornerTV]

Hi, yes, it creates a USB disk on the PC. Thanks for watching.

[@ben12804]

@@TechCornerTV Is cvs possible too?

[@radekwrocawski3308]

Why function generation is only 250mV, not 3V?

[@TechCornerTV]

Hi, the output voltage of the function generator is 2.5V (2500mV) and it is fixed. Thanks for watching.

[@radekwrocawski3308]

@@TechCornerTV my oscilloscope is also 250 mV, How to fix it?

[@bobisyouruncle1]

I saw that too. The display is probably a software issue. Have you tested the actual signal generator voltage with a multimeter?

[@bobisyouruncle1]

​@@TechCornerTVthe display does actually show 257mv, not 2.57Volt

[@bobisyouruncle1]

Test probe is set to 10x, but channel to 1x

[@marcelomigueldasilva7444]

Não gostei dos traços é normal?

[@TechCornerTV]

Olá Marcelo, como assim, quais traços? das waveforms? Obrigado por assistires.

[@marcelomigueldasilva7444]

@@TechCornerTV traços da forma de onda. Parece que tá serrilhadas

[@javiergs7498]

What are your favorite oscilloscopes?

[@TechCornerTV]

Hi Javier, that's a hard one, it depends, I have it categorized, small oscilloscopes FNIRSI DSO180X and Zeeweii DSO2512G and this one is certainly come to the top also. Desktop entry level, Owon SDS1104/02 and Hantek DSO2D15, from that part forward, I really dig Rigol because are easily "upgradable", but also siglent for a more serious and accessible oscilloscopes. Portable and bigscreen Micsig. My everyday oscilloscope is a Rigol MSO2102A "upgraded" to 350Mhz. Thanks for watching.

[@javiergs7498]

@@TechCornerTV thanks for the answer !! I love your videos and Im see the old videos ❣️for "upgraded" you say "hack"?

[@TechCornerTV]

Yeap! 😁

[@waqasmobilecenter1610]

i don't understand english languge ...but this good or not for mobile repairing ?

[@TechCornerTV]

Hi, it should be enough for most of the components used on the mobile. Thanks for watching!

[@waqasmobilecenter1610]

@@TechCornerTV thank you ❤️

[@geoffmorrison3648]

1. Your unexpectedly large amplitude at 17:08 is because you inadvertently set the generator to 100Hz, not 100MHz. 2. You very often use the word "bandwidth" when you should be saying "frequency".

[@TechCornerTV]

Hi Geoff, 1. You're totally right, my mistake and totally missed me... sorry for this error. Got to be more careful next time. 2. Again, you're right and that one I already figure it out myself, but always forgeting, there is sometimes in some videos that I correct myself, but other times not... I do have to work on that, people understand what I mean, but is not correct. Thanks for your input and for watching!

[@osiosek6773]

Witam, proszę dodać język polski do tłumaczenia. Dziękuję

[@TechCornerTV]

Hi, the translation is made automatically by youtube. By now it should be available. Thanks for watching.

[@evgeniignatiev1442]

Правильно Zeewell наверное а не Zeeweii...

[@TechCornerTV]

Hi, it's a good device, maybe Zeewell is more appropriate 😁 thanks for watching.

[@gabe1234567890ify]

It could be a probes problem, not osciloscope itself. Those probes looks like a low frequency and low quality probes

[@TechCornerTV]

Hi, I tend to agree with you. The probes are those generic that you can buy for $5... thanks for watching.

[@maharbatc]

In milivolts, the siglent wins

[@TechCornerTV]

Hi, yes it is, it is a vey accurate device, but they're in different price ranges. Thanks for watching.

[@TechCornerTV]

PS - I edited my previous comment because at first I didn't get which siglent you're talking about 🤦‍♂️ only after sending the reply I got it..

[@JohnDoe-es5xh]

Rubber feet are totally overrated.

[@TechCornerTV]

Hi John, sorry the late reply, trying to keep up with the comments, not easy. You're totally correct, who needs rubber feet 😁 you just need to catch it before it reaches the end of the workbench, other than that, it's fine! Thanks for watching!

[@VEC7ORlt]

How many subscribe banners do you need to shove in our face? Adding more will surely do it, dontcha think? Have a downvote for your effort then.

[@TechCornerTV]

Hey there, It's a pitty that all you saw was subscribe banners and not the few days of work this took to record and edit, but I'm sure am thankfull for your view and even the time you spent to leave this comment. Regarding your downvote, you're on your right, I'll try to improve.