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- Опубликовано: 26 авг 2024
- What's inside the 4CH 100/200MHz entry level Uni-T UPO2104CS oscilloscope?
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Good to see more players doing these entry level 4 channel scopes, prices are going down and becoming more accessible than ever, we all WIN =]
HEEEEEY!
As long as they are safe to use...yes, I love that soon I can buy a new scope and know that there is SOOOO much it can do these days!
indeed, im grabbin me a entry level 2 channel for only 300USD!
Cheers Dave. Looking forward to this one, I've always had an interest in Uni-T gear. I'll pop back later when 1080p is available.
Dave, on a 4 ch scope, its a XYZW mode which you can only find in the menu by going deeper and at the proper time.
400Hz power input. Guess it's aimed towards the Aviation industry too.
10:28 - I thought those were resistors that control a 16-bit "option" selection thingy (200MHz, 160MHz, 100MHz, etc.)
Really enjoying the new intro/outro animations!
"I'll show you how it compares to the Rigol in a minute"
I got the same osci and a function generator UTG2062B. Great devices for the price. I met the UNI-T people on fairs in Germany. Nice people. They want to get the users satisfied and are also open for improvement suggestions.
About the DC offset thing, it's definitely hardly a new feature. As hinted by someone above, yes the Tek scopes have had that for a while. My very early '90s Tektronix TDS 544A has this feature... so I guess most probably any of the TDS 500/600/700/800 series scopes, have it too...
UNI-T? 500 bucks? no thanks
Uni-T have a product range of 99% junk.
It's Ultra Phosphor
I like Uni-T products. They're good and affordable. Great video Dave!
Their gear is total junk.
@@MickDownUnder why?
@@riley5114 hello read comments before reply I am not comparing I am just asked above comment
UNI-T here is common in Northern Europe. I have a few UNI-T multimeters that works great
17:15 When you are looking for some datasheet and suddenly you open a portal to another dimension.
It happens.
My Tektronix 7A11 and 7A13 v7000 series analog oscilloscope plug-ins have a a DC voltage that can be used as one of the inputs to a wide common mode range differential front end so you can see small DC changes well above or below ground. It can be very useful.
“Street price” 😂
…I buy my scopes from a back ally trench coat man who opens his coat to flash his wares saying, “What you need? SIGLENT? RIGOL? UNI-T?” 🤨
I have the UNI-T 4102C model which has a few extra features. I'm very happy with that.
Dave, you forgot the link to the warranty sticker cheat video. Not that I’m planning to do that or anything! 😇
It's linked at the end.
EEVblog ah so I see. I was looking in the description. Sorry 🙂
From a mechanical design point of view, the grid of punched round holes for the fan grille is really amateur/lazy. Basically half the fan's area is blocked by steel. Decreases air flow and grealy increases noise.
A honeycomb design style grille is far more efficient.
And why not just have a round hole, it is inside an enclosure that should not be opened normally,
Yes, I agree. I always cut out those holes to make air flow better. I dont know why manufacturers dont just cut out one large 80mm hole for the fan. No need for any guards.
Simon Tay - I don't think that would pass EMC testing...
But yeah, PC PSU manufacturers generally got over simple stamped steel grilles in the mid-2000s or so...
No! That metal is for shielding to keep that frequenzies from power supplies in or disturbing UHF pulses away from the circuit. So you need that warm air getting out and for not to weaken the shielding they only make those snall holes in the sheet metal. The bigger the holes, the lower the freq could pass through !
@@muctop17 You have a point!
Very good review. Lets hope they fix those minor software issues in a flash update.
19:56 I think that's a resistor that's flipped upside down and almost tombstoned
Wow! 49 seconds to boot?! Ok that it has many many fancy resources, but my good ol' CRT oscilloscope from the 70's takes less than 10 seconds to warm up its cathode and it's ready to go! LOL!
I wouldn't trust a UNI-T any further than I can throw it, though I must give it to them. Giving Dave a scope to do a teardown... nice move!
Thanks Dave - nice review- go Siglent. But interesting and unique features on the Uni-T.
As Dave has quoted in the past "built down to a price."
As it's 599 US DOLLARS does it come with a giant enemy crab and does it feature realtime weapon change?
This is a highly realistic setting. So here's this GIANT ENEMY CRAB.
I have the Uni-T UTD4152C for Hobby. Im happy with this one.
Dave, and or anyone...you mentioned the squigglies in the trace to be perhaps trace to make length...and in theory, billiseconds might be matched....however, after seeing that also again at 11:34 secs...maybe that is an experiement of theirs with "twisted pair" wiring design withing single trace (as opposed to cable runs)? Multiple frequencies near each other but at an interval accordingly to keep dead any inductance or such? and or at such an interval to block unwanted frequencies? Just a quick spot from what is honestly a newbie in real ways! Thanks again for all of the great tear down vids!
Yes ,what happened with first upload?
Stefanos Tselepis Thanks for answering. Have a good day!
Hi Dave, what hapend with first upload?
Some say it was only 360p!
Others say it was de monetized!
The truth is, there is no spoon.
True story
There was a long dead period (black screen, no sound) early on in the video - something like half a minute long. He seems to have removed that.
T
h
The most incredible bias is not the DC one on the uni-t, it’s Dave’s one on the brands he doesn’t like
I have utd2102 cel but it doesn't work as it should be ie it doesn't measure voltage level at all also vertical changes when knob is rotated but comes back to max amplitude
Help anyone I have this oscilloscope, it was working fine after only one and half years of very light use it permanently hangs up on Uni-t logo. Any suggestions hard reset or something 😢
Great tear-down Dave. Really admire your take.
50hz hum at 11:00, not loud but noticeable
Yep 50Hz, starts at 9:34.
clean your ears or get some better audio gear than your 2$ logilink headset i.imgur.com/3S5Nfge.png
HalfSpeedMastering You taking the piss mate or what?
ahahaha
The Rigol DS1104Z is a 100MHz 4-channel DSO and costs $619.
Hi Dave! Annoying low frequency noise, when under the microscope shooting does at 9:34 for example. cut off low freq a little bit maybe? :)
Not to mention the annoying high frequency noises throughout the entire video.
I wish i could buy one !
Those Sacon FZ caps are complete rubbish. Didn't expect to see such crap being used in what otherwise looks a half-decent device.
I love how he says chassis
Please have Flyn as a guest soon.
When I saw how dirty the board for the power supply was, I wanted to shower after watching this video :)
Was playing around with a LeCroy 20GHz, 80GSps scope at work we had on eval last week. All other scopes (even £20k ones) feel like toys now :|
Hi, Dave, can you recheck the fan operation?
I was always taught and have come across ventilation where the fan pushes cold air, rather than sucks hot air.
Pushing cold air maximises the air mass flow rate to help efficiently cool the chassis.
Tom..
No, you cannot maximise the flow rate, it's purely down to pressure difference that the fan will generate between its inlet and outlet. The direction can matter if you have laminar directed airflow onto a specific part or part group that gets particularly hot - if you reverse it, you get same airflow, but for one, it's no longer directed, and thus part of that airflow does nothing or gets short circuited, and for other, your deltaT is smaller because you're picking up warmed air from parts that you wouldn't actually mind running hotter at all.
If all you need to do is prevent stale air and replace the warm air, because everything emits heat but nothing requires special cooling attention, then extracting can actually be better, as the inlet is non-directional and this avoids pockets of warm air near the fan.
Thanks for the video Dave. You would think for the higher price you would get something the others don't have? That has to be a fail from a business perspective.
Looking forward to find the best entry scope at the lowest price !!
adds blocked.
Give us back the XY mode ! :-D
How else can we plot Lissajous ?
I can see one of these on my bench shortly, as both my old Farnell cro's have died for the last time :(
Hi Dave!
it wasn't DAC it was high speed copmarator
ADCMP562B not AD5628 !
Yep, he missed that multiple times! Every time he saw that chip he said it was that DAC but it was a comparator. Double checking "8"s aren't "B"s and confirming pin counts is a *trap for new players!* ;-P Not to mention that one needs to look at the full part number... he ignored the "CMP" also.
He also seemed surprised to see a DAC in one of the locations (front end) and that should cause you to investigate further.
Doh!
Got ya, Dave! Well, Mohammad did first. But you're a new player so it's OK. LOL!
Doh! :))
these resistors at 10:30 look like they are programming something, maybe to select different models (something like the Keysight 1000X (ruclips.net/video/eeds2QsUa_w/видео.html))?
Maybe, they looks like 16 bit binary configuration (populated on the left OR right but not both)
I got DS1102D, it has an Altera FPGA !!
RIGOLOscilloscope OR UNI-T Oscilloscope ??
That DC bias is curious.
I wonder if you could use it to power external devices to low power levels?
Can you show the data signal of the LVDS on an oscilloscope ?
That lagg in the gui would drive me somewhat nuts.
...... What about a subliminal still frame of 'Errol' coinciding with "In like Flynn" ?
I say all junk, too much ripple / Noise... i like my Tektronix 453 465 scopes, back in the 80's Phillips scopes were good too
Good job
£530-560 in uk.
Is the serial decoding etc. disabled just because the scope is in Independent mode?
Richard Garnish that was my thought too but right at the end after he hit auto-set, I think he pressed the decode button again and it still said disabled.
Daniel G oh yes, you're right. I thought the Auto button might have left the independent timebase enabled but it did turn that off and the Decode still didn't work.
It seems to be a popular thing to document how long these scopes take to boot. I have no idea why this would be of any concern.
It's not like your taking your Fluke out in the field and have to wait for it to power up to measure something. Its a bench scope, you get into work, power it up along with your computer and other devices.
People complain about boot times on their desktops too. Everything's about instant gratification these days.
You obviously never had to quickly show a problem on a design with a bunch of bosses/customers looking over your shoulders...
then you should have set up before hand, like when you start work or just get into the lab
It's kind of depressing that a crapscope does what the a-brands don't
- DC offset because as you suggest it's a completely different thing than moving the trace up an down with the vertical controls (there are some scopes which have it.. i think some tektronix.. WA2EW did a video on those)
- Independent time bases/triggers. A relic from the past that can still be useful.. if you want it today you have to pay for two scopes or for a 5-figure scope.
I think that the picoscopes have dc offset/bias functionality, also some of the recent touch screen scopes had that too, was it an R&S one? also a lot of active probes offer that feature, so its nice to see it.
are those functions still disabled when you leave the independent mode?
I did not realize those got so cheap!
But i can buy a Rigol one for 400€, and i consider that pretty cheap. For a 4 channel oscilloscope.
Not in the market for an oscilloscope in the last 10 years. Those things usually don't break that easily.
The pipelined sram is way too slow to be used as a buffer. It probably only does the digital phosphor stuff.
Hi Dave, in the first chenel i think is a fliped resistor
Wait, is that a tiny little ball of solder on the 8-pin chip @ 21:17?
Thanks for the video y very good. I have Unit UPO2072 and the decode button only works with pc software. greetings
marvicdigital Hi I tried the software but I didn’t find the decode, can you share the version number that you are using, may they disabled it in the newer versions. Thanks.
All UNI-T equipment I saw up to this days had terrible firmware with all kind of bugs.
What is the difference between a solid state relay and a MOSFET? Thanks
When you do your beginner 4-channel shootout will you be including USB scopes like the OWON VDS2064, or the VDS3104?
Hello sir, can you please explain what is the significance of length matching in pcb? 😊
Heya Dave, so which one of all the entry level scopes would you suggest getting? I want to get a frist scope for designing and troubleshooting audio-equipment.
Up until now I wanted to get a Keysight DSOX1104A, but the Rigol 1054Z is also an option. I'd really like to get a decent scope for most general purposes.
Any suggestions? :)
Any idea where I can find any info about these menqx / nenqx caps? I couldn't find any mention of them on internet.
At 13:20, I had to rewind and listen again, a 1MSPS ADC?
Very Good !
cood you update FW and reve again pls
Why on Earth would you relief connect the vias?
Sir why did you delete the first video that you uploaded just a couple of hours ago?
Is there any internal or external 16 bit logic analyzer in upo2104cs?
What is the name of the new siglent, I am very interested.
Thank you.
what happened to the upload of this earlier tonight? did it get insta-flagged or something?
So you say Zed in Australia the same as Canada . Learn something now and again, every day .
LRoy Shreding
Same throughout the ex-British Empire. Only the Yanks do the ‘zee’, so far as I am aware.
And I just bought a 2 channel Siglent, too. DAMMIT!
Shmeh Fleh
If you need four channels you should have waited for the four channel Siglent, then do a comparison.
(Dave said that he has this now, but it is still embargoed. It was released in China a while back.)
is available schematic of this scope?
I don't think that's a cap. Looks like an upside down resistor. Guess they decided they wanted the electrons to fall out.
Is oscilloscope homebrew still a thing? I remember people running games on them going back 15 years ago such as a person getting Wolfenstein 3D runnning on one.
Also, to note...programming is one of the big things about today's tech. So many components are available, and engineers have a pretty wide spectrum on how they can achieve a program on a chip to accomplish the task they were asked to do. One thing that really got me mad years ago was a Minidisk recorder/cd copy to minidisk/player unit....It was JVC with three CD trays and a Minidisk slot. If you either put a cd into any tray, or you wanted to play any of the three trays.....OR you just wanted to play a single minidisk that you put into the slot. You put the disk in, and the programming says..."hmm, is there a disk in slot one....yes......(mechanical movement) is there a disk in slot two ( mechanical movement) is there a disk in slot three? (mechanical movement)....okay, there was a disk, did they want to play that?, no, check the minidisk slot and play button....yes, there is also a minidisk and they did press the minidisk portion of the play button on the front panel...should we play that...yes...okay, here ya go. The whole process took over 45 seconds. The device was I would say decently built, however....PROGRAMMING FAIL. I am so afraid of self driving and flying cars!!!
Pffff no X-Y mode? This thing is no competition for the 1054Z.
There is XY mode in display menu
Yikes! Dacs coming out of our rear end.
17:14 Did Dave divide by zero again?
This totally baffled me that a large scale manufacturer would bother handmodding scopes... or are they low-cost and low number? That would not add up to me...
I don't know, maybe they're having difficulty getting people to trust them and buy more scopes, so they're making them in smaller test batches so far only, hoping to reach higher numbers later, and by that time they'd have the design fixed up so they wouldn't have to bodge it.
There are expensive ICs on those boards, that don't necessarily like being desoldered, re-reeled and soldered again. If that board has $30 or more worth of ICs on it, surely it's better to pay someone $2 to fix it up rather than throw it away? An electronics assembly worker gets what, about $5 or $6 an hour in Shenzhen, right?
Those dont look like DACs they look like ADCMP561 comparators!
"You can see all the traces buggering off over here...national...buggering off via..." Also, "dielectric rubbish." If Daiyve was an astronomer, he might say something like "galactic rubbish buggering off the gravity lensing of the Trifid nebula."
Second upload?
So it coast less to have someone put heat shrink and solder the fuse in, instead of a fuse holder installed and soldered in by machine ? Must be Chinese math.
Only 360p? What is going on?
You need to wait few mins after upload, then all qualities will be available. At least I think it should be like that.
Hi! I don't know if you're aware of this, but your use of the word 'whatnot' has been getting slightly out of hand lately. I've noticed it on the Amp Hour as well. This is not criticism, just a friendly note pointing it out in case you weren't aware. Thanks for all the content, love your stuff!
Is his logic wrong? Should he be saying whatnand?
Does it take a while longer for RUclips to transcode the higher res versions? It's only available in 360p for me
it does
Of course it does! :) Sorry, I meant if they make the low res versions available earlier. Obviously the do :) Thanks anyways
Anyone know how to contact that Uni-t support, I have this scope and it needs important firmware update, in the CURSOR menu, can’t set the source to MATH, it could be only set to any of the four channels.
I have a personal contact. Contact me on telegram. Search for Harry Mudd
@@Die-Spezialisten
Hi didn’t find you on telegram
@@ultimateworkshop2000 HarryMudd2020
what is the 'timesBase' should be?
"Time Base"