EEVblog

[@linkboy16]

Out of everyone of my KZbin subscriptions, you update the most frequently, thought you should know that. Love your videos. Thanks.

[@EEVblog]

+Ren Kararou thanks, I try.

[@GhostOfJulesVerne]

Not related to this specific video, but Dave, because of your videos I finally figured out how to use a bipolar transistor after 10 years of frustration. Thank you! Now on to mosfets and the 555!

[@faridsafazadeh1137]

OMG. You are amazing. Never seen reviews like yours. You are just great in what you doing. Thank you so much for sharing...many many thanks!

[@BenjaminGatti]

what you call weird is an airflow channel, meant to preserve flow when against a wall or set flat on a table.

[@palindromic7873]

Who is this guy? What's he on?

[@geerant101]

Love the reassembly time lapse!

[@tejas57]

dave, just want to say thanks. i have an interest in electronics but never built or acted on it. because of your awesome videos i brought my first soldering iron and an intro to electronics kit today

[@charlesdorval394]

Could the 5.5v be to allow headroom to use some very low drop out 5v linear voltage regulators ?

[@EEVblog]

+Charles Thatisall yeah could be

[@samgab]

8:55 , looks like cold solder joints on the Common and V input jacks? If so, those'll crack and fail in due course.

[@vk3hau]

7:00 is the earth wire on the wrong IEC pin? Looks like it on the Neutral pin.

[@0x8badf00d]

Hopefully there are some weirdly routed traces on that board. And it could be LIVE as well, we have 230 V 50 Hz in Europe and unpolarized plugs.

[@AAAyyyGGG]

Hands up those who can clearly see the fan "airflow" arrow at 10:31 (pointing upwards) while Dave blathers on about how badly designed the airflow is... I wish he would check his facts before he belittles the design engineers so much...

[@TheGFS]

haha @EEVblog always goes off the rails right from the start if the UI and things are not exactly like Daves wants it to be, sometimes I wanna hit him in the head with the gear he is reviewing , but that's half the fun =) But I very often feel like he should spend a couple of minutes before pressing record and learn how the damn thing works before he starts sounding like somebody is strangling a cat :D

[@antoineroquentin2297]

The antenna on the mains socket is probably the best they could do. A microstrip antenna on the PCB would have a bad ratiation pattern because of the close ground plane. So it's the furthest point from the ground plane. A half wave dipole would be better of course ;)

[@thedanyesful]

Best they could do? Seems to me like the sky's the limit and of course we've seen incredibly clever designs from other manufacturers.

[@gregfeneis609]

At 6:53, I bet with a little experimentation, they figured out a way to couple their wifi to the mains cord for better reception. I'm not a radio guy by a long shot, but I've taken apart enough clock radios to know that's how it's done. In general, table top AC powered radios usually have some coupling between the radio antenna circuits and the AC power cord to improve reception and in some cases not need a telescoping antenna.

[@khronscave]

5:33 Those aren't no-name! Those are top of the line... sorry, i meant top of the (junk) heap CapXon KM! Ah, there went another typo - C-R-apXon...

[@m4d3ng]

Re: custom oscillator, I'm willing to bet the parts sourcer found that bodge + Chinese labour to be cheaper than the spec'd part.

[@zaprodk]

17:14 what's going on with missing the R139 & R140 and flux residue - someone reworked the board ...

[@EEVblog]

+zaprodk I watch the video through the small camcorder screen, and in taking at the same time. Easy to miss stuff

[@zaprodk]

Sorry, that text came across all wrong - it was not critique. It should have said "what's going on with the missing R139 & R140 and flux residue". But maybe explore what it might be? Can it be resistors that set the model in software?

[@bborkzilla]

For observing really low noise signals I use my Tektronix 5103N. It's not digital, it's kind of heavy and it has no real storage capability. But it only cost $20.

[@ChipGuy]

18:13: Is there a short between two pins of the Ethernet connector?

[@alcapone5674]

I think it does not mind because the two pins should be GND on the connector

[@jtveg]

Thank you. I did find it very interesting. You are a very pedantic and in depth reviewer. ✔

[@fjs1111]

who did that stevie wonder!! I'm ROFL Dave.. I think you nailed it all. That is absolutely the worst place to put a Wifi antenna because there is going to be 50/60Hz coupling on to the wifi frontend most likely uckkk, the fan arrangement is hilarious

[@calholli]

I wish you would do the TAO3104a .. it seems to have the same specs as this, only in a tablet form factor. It would be a great candidate for a shakedown. It's quite a bit newer by Owon, and we could see if their layout is any better now, all these years later.

[@crocellian2972]

Another snide review. I was impressed that all the EEVBlog stories about Owon lying on specs were false.

[@CliveChamberlain946]

The back is curved in case it gets pushed up against something, but with no direct air entry/exit points thermal instability could be an issue. Lots of room on the DMM PCB so revisions could be made so this this could stand up to an educational market.

[@MrDoneboy]

If nothing else, Dave can surely turn a colorful phrase!

[@Chriva]

Aren't those antennas taped on? Kinda scary place to put it.. :O What happens when the adhesive dries up as it usually does?

[@marvin19966]

the world explodes

[@Ale.K7]

"What happens when the adhesive dries up as it usually does?" -Look at your avatar.

[@keen2461]

It's the "normal" product nowadays. By the time the adhesive dries up and the product goes kaput, the warranty is expired and you're supposed to buy a new one. 99% of the products are like that, unfortunately.

[@cmuller1441]

They released it at $1400 so they can sell it with a 50% discount. Customers will think it's a great deal and owon will still have a nice margin...

[@Hazmoment]

another good watch mate. Cheers for that

[@brutester]

Dave, there is a fuse on cable connector, so having a second on board makes no sense

[@kramer3214]

That applications processor is the same processor used in the Beaglebone!

[@ats89117]

Big thumbs up for this teardown. I'm guessing the 5.5V input is to allow for an LDO for clean 5V power. Maybe an ideal diode power priority chip in there somewhere for the battery backup...

[@ernestb.2377]

Long time ago, I see, but this scope is still on the shelves. Could you maybe also look into the things as: Interval (△T) Accuracy (full bandwidth): Single: ±(1 interval time + 1ppm x reading + 0.6ns); Average > 16: ±(1 interval time + 1ppm x reading + 0.4ns) and.. Sample Rate / Relay Time Accuracy = ±1ppm ...or maybe somebody else can make a comment on that.

[@GautamKumarGoswami]

So far I can remember, initial Owon DSOs were really 'not ok' inside, but now they have improved a lot excepting some passive components which could easily be replaced by renowned makes. Considering price points, Owon really a charming performer & surely they will improve more - here I am confident, though I am not much confident about Dave's attitude towards Owon!!

[@ThomasHaberkorn]

Hi! I have some trouble measuring the inductance of a coil in a bipolar stepper motor (20 Ohm resistance). I have used several methods using function generator and oscilloscope. So far, the results are pretty much all over the map. Please discuss this topic (maybe in Fundamentals Friday..?)

[@michaelhawthorne8696]

That sudo IR port at the top right of the screen maybe a con into making you believe there is more functionality to this scope than there really is. I wouldn't fork out this price for what is inside.

[@joeambly6807]

Burnt connector at 18:05

[@davidbahr7659]

perfect soldering iron tip rest. i mean where else do you put that thing?? lol....

[@wazawoo]

Why are the slots cut under the resistors at 8:12? Could someone enlighten me?

[@KissAnalog]

The pcb material actually has a lower resistance than air, so to increase the dielectric strength between terminals, you put the gap in. If you look closely, you will see several other notches. This actually increases the cost of the board. Routing isn’t free like drilling is . As long as the holes are not too large.

[@3mariusx]

nice teardown! i have another simmilar one (XDS series also) i can say that after one hour the case gets quite hot on the edges because of that bad thermal design :(

[@jp_engineer]

Thank you a lot for all you video. Since I started to follow I improved my english and got used to your accent. And of course I learnt a lot of electronic stuff I didn't in college!

[@tubical71]

Good morning Dave... :)

[@EngineeringVignettes]

Yeah, he totally needs to have an offsite sample of the AI that occasionally chirps out random movie quotes: (Dave is busy tearing into another brand new scope) and then... "what are your doing Dave?" - Eddy

[@lutello3012]

Stupid question because I'm not watching these: Why is it only 14 bit?

[@techmage89]

Lu Tello Making accurate, high speed converters gets exponentially more complex as you add bits. Many oscilloscopes are 8-bit as a result. A 16-bit converter would have to be very slow or extremely expensive.

[@KeysightLabs]

Lu Tello If it helps clear things up, the "bit" specification refers to the analog to digital convertor (ADC) and not screen colors or anything like that.

[@marvin19966]

"only"

[@techmage89]

To expand on this, each bit doubles the effective resolution of the scope, so a 14-bit scope has 4x the resolution of a 12-bit scope.

[@KeysightLabs]

techmage89 technically yes, but you have to start looking at noise floor and ENOB at that point, I won't go into it but it becomes the precision vs. accuracy discussion

[@FalconFour]

IRQL_NOT_LESS_OR_EQUAL is usually a hardware fault in my experience - not caused by an update. Many, many things to check for, but a common and quick one might be just to reseat the memory. Windows 10 may be extremely annoying with its slow, forced updates, but the update mechanism itself is pretty solid! Also, +1 for the Owon scope. Our shop runs on Owon scopes (the mid-low end ones like the SSO8192) and they're fantastic to use, intuitive and straightforward for folks that aren't hardcore hardware geeks ;) Battery is very useful for isolation, not just travel!

[@greenvm]

i had IRQL errors while overclocking(those good 'old' ivys from like 2012), but I had them on completely stock machines as well

[@jeffmetten5836]

Analyzing the memory dump with a debugger can do a lot to solve the problem.

[@brainndamage]

Jeff Metten Uhh yeah, sure. Then what? How do you fix it? Talk bad about Linux's useability, but I've always been able to rescue a linux install by chrooting into it with a live usb stick and fixing what's wrong, I've Never had a successful Windows repair. It always ends up in a complete reinstall. Whereas with linux, you get back up and running.

[@raymundhofmann7661]

In W10 pro the update service (still) can be disabled to prevent "blue" surprises like that.

[@chamilbuddhika3874]

Amazing review.. thank you sir

[@Brant92M]

Since the internal rail is 5.5v I wonder if you can charge the internal battery over the USB device connection? Not enough to supply the 20W it wants to run, but you could totally charge while it's off

[@priestblood]

how bad was the soldering on the multimeter board and i saw a lot of bad soldering .for the price you would think the QC would be a higher standard .I see alot of potential faults waiting in the wind with that particular scope

[@RootsLibero]

What is the purpose of using all that relè? I mean, the pros and cons in that kind of design. And why do you like their usage, Dave? Thanks !

[@makebabymake]

The adc's are about us$100 each at 100 qty (mouser uk prices)

[@EEVblog]

+makebabymake ouch. I wonder what they pay for them?

[@todesgeber]

no fuse in the power supply? could that be because the socket itself appears to be fused?

[@ajofscott]

For the most part I am happy with my Owon aside from the lack of support for current operating systems for the pc support.

[@LucasHartmann]

Is it the same processor as the BeagleBone?

[@zx8401ztv]

It looks good enough for most ordinary use, the inside looks fine, it consumes bugger all. It won't get hot enough to die fast, the crappy caps won't be doing much. I'm allways supprised how much they can cram into bugger all space :-).

[@hikemoncho]

Check out that burn mark on the C624 connector at 17:56. Chinese quality control at it's finest.

[@4IN14094]

If you buy one once the warranty runs out the first thing to do is to replace all the caps

[@aabs7978]

Or sell.

[@NadolbenBlogspot]

look inside the cisco routers 26xx - see the same fan implementation...

[@romanbadura3748]

Nice video... Helped me with disassembly. Has anyone been able to flash the firmware on this model? Is there any recovery tool that can keep the device powered on when the self test fails and the device shuts down within 10sec. does it turn itself off including the USB connection?

[@wingwong8405]

Hi. I had a pds5022s oscilloscope, every thing is good .but had a bright circle on LCD display center ( 2 inches diameter ) could tell me what the problem of it .Thanks

[@BMRStudio]

I don't feel the "jump on it"... Maybe for 800 bucky?

[@enricorov]

I'm totally new to this game, one of the young players who fall for the usual traps. My question is: why would one need 14bit ADCs? Dave said this is a niche product, what are the use case scenarios in which I'd need 14bit precision out in the field?

[@aabs7978]

Normally a 8 bit scope has only 256 steps in the waveform, everybody wants more bits, especially when you are used to analog scope.

[@GautamKumarGoswami]

I find Owon uses more reputed semiconductor part brands for their product than Siglent or Rigol. Am I right here in my observation ?

[@Wingedmechanic]

So your scope says wifi, but I see no antenna? Well, the entire powergrid is the antenna!!!

[@TheScarvig]

btw dave how about you make a video about how to identify chips and ICs? like what of the scribbles on them is actually important and where to look them up

[@Jerguu]

Hey Dave, any plans to do a test power-up of that core memory you got a while back? I would really love to see that thing in action.

[@IizUname]

I want to build a basic oscilloscope, where should I start? Right now I'm using an old tube TV as a wave visualizer. I've taken a couple circuits courses so I know about op - amps, diodes, mosfets etc but I'm not sure how to combine all of those things to make an oscilloscope.

[@billa8671]

a CRT television is a basic oscilloscope. you have both the vertical and horizontal drivers and a time base generator in b&w or color TV. however the ' time base ' is the horizontal scan rate of NTSC video. all you need now is an input buffer and a trigger amplifer

[@Embedonix]

5:20 I fell off my chair laughing...damn you dave!

[@qzorn4440]

now i stevie wonder how the test equipment works for basic troubleshooting? if it works who cares what is under the hood? i just don't know? great video and thanks a lot...:) pricey

[@muctop17]

Do they use " low noise" regulators to get down from 5.2 V ? I' ve learned that's important with vcos an ADCs!

[@Robbe902]

Umm.. The fan points clearly to the rear board. You can see the arrow on the fan pretty good ;)

[@EEVblog]

+Robbe902 the heatsink, you know, that thing you want to get the heat out of, is on the other side of the board.

[@Robbe902]

Yes, I saw that too. On the other hand, the cooler has no fins anyway to spread the heat effectively. I do not know how much waste heat is generated by the display or other components on the front, or if the fan is only installed to create any air movement (to pull warm air away from the front). You're absolutely right that this fan is somehow .. misplaced in its place.

[@DoRC]

Look at those dry solder joints on the dmm input jacks.... Terrible.

[@iamjadedhobo]

Not only the DMM input jacks: the oscillator board looks horrible! That SOT23-5 looks like it will drop off just by looking to hard at it.

[@macdonalds1972]

But it has a QC Passed sticker!

[@MarkTillotson]

The 10A shunt is adjusted by moving the solder around until the shunt is in calibration - hence the messiness. This is the normal way to adjust wire shunts!

[@bukitoo8302]

Could that black plastic you 've mentioned be a IR window for some kindof remote control?

[@pesho9971]

The pcb's of the scope looks like something a hobbyist would design

[@rca168]

Hey Dave, the fan is blowing the other side, they always blow away from the sticker side from my experience

[@TheHuesSciTech]

14:38 That soldering on the oscillator daughterboard is awful -- solder hasn't wicked to the legs or the pads...

[@FernandoSantos07]

Hello Dave. I don't know any other vlog, like this, and probably no other with so much content or subscribers. Good Job! What do think of rate the oscilloscope. Like give a "Gold" or "Silver" award?

[@Falney]

Is it just me or does this seem to be not worth its price point when looking at build quality.

[@HaroldsStuff]

So it is not as good as a Megadrive what with being only 14bit?

[@richardbalboa7161]

This oscilloscope is insane.

[@mdesm2005]

you complained about the fan, does the unit run too hot?

[@jeffersonpimentamelo]

There's a fuse in the AC connector, maybe you should use a multimeter cable with built in fuse :D

[@stealthbanana]

Dave whacked the heatsink off...

[@sylvainbel]

Nice video 👍thanks

[@youtubxkip]

Dave, isn't it a bad design having 4 coil (of relays) UNDER THE SHIELD? What for are the shields then behind the front ends inputs?

[@khronscave]

10:45 Still probably has better thermals than just about any MacBook (Pro)...

[@xtrariceplease]

It's an integrated product of Apple, iLapWarmer LOL

[@crawford6099]

i'm wondering could u install a ssd drive in an oscilloscope at all to make it a pc i know that is a dumb question but seance the cpu is almost like a pc cpu could you just wondering???

[@thomashirtz]

Hey EEV blog, you did make a remark at ~21 minutes that this scope is not really polished ... Have you a the teardown link/referenceof the most polished scope that you have made ? Thanks !

[@kabouterpinguoverlord9946]

Hello there! Maybe it's a silly question but it's nevertheless a question I'd like to ask anyway, I have the feeling that when watching these videos I never get to completely grasp the subject. Ofcourse I would really really like it, and your videos are very educational aswell, love them! But I guess I'm feeling overwhelmed by the material. I have a background in Chemistry and I'm currently studying IT (majoring in cybersecurity), so not completely unfamiliar but still. I guess I'd like to ask you,or any of the other fellow commenters and wonderful followers where to start?

[@rubeniraheta6067]

What switching IC are they using for their switching? Is it just a typical rectifier with stepdown windings plus a buck?

[@khronscave]

What's a "typical rectifier with stepdown windings plus a buck"? Especially at that power level, you don't expect a whole lot of complexity. It's just your bog-standard off-line flyback converted. That TO-220 package on the primary will be the all-in-one PWM+MOSFET combo (think stuff like the TOPswitch line).

[@rubeniraheta6067]

What I meant by "typical rectifier with stepdown windings plus a buck" is an offline converter! I didn't know it had a specific name for that topology. Thank you for commenting, learned something new! And yes, I can see now that discreet parts really wouldn't be necessary.

[@khronscave]

For the record, "buck" is by definition a non-isolated step-down converter - not something you'd want in mains-powered gear :P

[@timlipinski2571]

So Rigol is a better value for the money ? (and better deal on ebay) tjl

[@learnelectronics]

Tim Lipinski check out Hantek

[@SignalViewRadios]

is that the giveaway u ripped apart?

[@AttilaTheHun333333]

Can anyone help me? What oscilloscope could I use for tuning audio equipment like reel to reel and tapedecks?...so up to 30 kHz or something. Can someone give me a tip for an affordable machine, if that's even possible?

[@KeysightLabs]

Attila theHun you can check out the Keysight 1000 X-series, for audio use you may like the built in Bode plot/ frequency response analysis.

[@38911bytefree]

back in those days, 20Mhz were the standard, and they were CRT. For speed check still better to use an universal counter IMHO. The rest I cant tell but bet you will need XY mode at least. Very obvious, but check that. Most service manuals try to use Multimeters when posible, they use very clever procedures. Also helped with specific tape. For R2R only seen the UHER Report series, and I dont recall them telling about an scope. A pretty decent machine. Probably I am mistaken. I would pick a good analog CRT in good working order, 40Mhz would be enough. Analog gear were the only option in those days so they will fit perfectly.

[@bislan6736]

good afternoon. How can I buy from you a multimeter brymen 235. I really liked it.

[@Soundfactory24]

Installing electrolytic capacitors directly next to a heat sink is a deadly sin, but good for OWON,s business. OWON, no thanks !

[@Sixta16]

Wow... that multimeter section is really a sad one O_o

[@IljaSara]

Price does not match the build quality. **sigh**

[@rich1051414]

Stevie wonder is blind, not stupid lol.

[@marvin19966]

hahahaha wow

[@tech29X]

And that's what he meant; Are you blind, can't you see how terrible where they chose to place the fan, one must be blind "like Stevie Wonder" to place the fan squeezed under the board as shown in the video @10:40

[@bejomiharjo2025]

no no no ...... i see it's a amazing machine.... thanks for showing it. can't you see it....?

[@ketse89]

I got the 100MHz 12bit 'little brother model' XDS3102A Plus and I can concur that the XDS3000-series is amazing! Only thing I'm not happy about is the provided probes, they're garbage. And for some reason my scopes device mode USB doesn't work...

[@alocin110]

if you want to buy a non-ridiculous DSO with the same features and made by USA; Japan, UK you will pay $6580.00. Don't criticize compete if you can. Ridiculous cynical review.

[@dant5464]

Xunda caps are on the move, Xunda caps are loose

[@kuehneniggle]

Muriel's Wedding reference noted...

[@daveblane6442]

Damn, Dave!! is there an UGLIER watch? the true geek!

[@gryzman]

blimey, one of those FPGAs is over $100!

[@Monkeh616]

Ah, Flimsy Semiconductor.. I give those multimeter boards one chance in a hundred of surviving a week of real use, even in 'low energy' environments..