Rigol DS1202 Z-E review
Vložit
- čas přidán 27. 05. 2024
- I bought this scope 9 months ago. I have now used it enough to give it a reasonable review.
Not a bad scope, some annoying bits, but overall much nicer to use than the USB scope I bought previously. Physical knobs and buttons are so important.
Compared to just 20 years ago, real test equipment has become affordable to electronic tinkerers like me.
On the Rigol, you can eliminate the noise by selecting Acquire->Mode->High Resolution. This averages neighbouring ADC samples, which reduces the bandwidth and the high frequency noise. Note that this is different than averaging mode, which is for averaging periodic waveforms. High Resolution works for non-periodic waveforms, and is useful any time you just don't need to see the very high frequency stuff.
Thanks, that was useful.
Hi Matthias
When you press the mode button repeatedly, the scope steps through the selections. Pressing any other button locks the selection. This way is easier than pressing the rotating intensity/selection knob which usually locks in the selection you don't want.
Joe
Thanks for the tip
Regarding saving stuff onto your NAS from the scope, the Rigol is fully controllable (including dumping raw samples) via USB or ethernet. I have my 1054Z (with 100MHz and other features unlocked) set up via the LXI LAN interface and I control it via a python library. The nice thing is that the regular UI is also usable so you get the best of both worlds. Obviously, these days I use the R&S RTB2004 much more because speed and features, but that is like 10x the price of the Rigol. Still the Rigol is very capable and probably still the best hobbyist grade scope.
The problem with the USB scope is that it's a ridiculous concept to emulate the knobs of the real thing in the UI.
If it was an interface actually designed to be used with a mouse and keyboard with just rolling menus and entry fields you can just scroll (like all editing software uses) it would just become a question of the poling rate and boot time between the two.
and keyboard shortcuts. if it just deciated certain keys to essentially tweak knobs by one click, that would make it nice to use.
"The problem with the USB scope is that it's a ridiculous concept to emulate the knobs of the real thing in the UI." I wish someone would say this to the VST industry and the thousands of electronic music artists that use horrible virtual knob UI all day and never complain about it. Glad I'm not the only one. There is a lot of great musical software out there that is held back IMO.
@@killsalot78 ikr! Why the hell does music software plug-ins have to look like actual synth hardware? I mean if it's just a look it's a cute Easter egg. But when it's gating usability...
Some of them do do it just for the look and the value can be scrolled or dragged as if it was a scroll bar. But still
100% a knob does not translate to a screen based UI, a couple of buttons and a "window" showing the current setting would be a MUCH more sensible choice for something like a timebase control.
I've NEVER seen a good "soft" knob implementation.
@@killsalot78I presume they expect you to be using a control surface rather (so you've got an actual physical knob to turn) than trying to manipulate the knobs with a mouse but it would be nice to see them have a "mouse friendly" option.
Interesting review, the bugbears remind me of my time working in an NMR lab, the lower field instruments would have various 200MHz scopes of a similar style but I'd often grab the 1 GHz Tektronix MDO4000 series scopes for the real work. One of the simple bits I loved was have a knob dedicated to each cursor! Of course they're a little beyond the hobbyist budget, as was the 8GHz scope we also had for really fun stuff.
I have 1054 but it seems quite similar. In i2c decode mode you can change from ascii to hex you need to use up/down button on the right to the screen to change menu. Secondly there are some nice python libraries to communicate with the scope and this open lots of possibilities ;)
I guess I only sratched the surface in the 9 months I have had it
A note on probes. 10x setting has the full probe bandwidth. The 1X setting has a reduced bandwidth.
RE: the fuzzy trace, that's an on-purpose feature you can turn off. Somewhere in the display settings you can set it to "precision" mode. It'll then downsample the trace so it's exactly one sample per pixel on the display.
Someone else pointed that out too. I looked for it, could not find it.
@@matthiasrandomstuff2221 it's not exactly in an obvious spot if I recall correctly. I'll dig out my own rigol tomorrow and look for it.
@@matthiasrandomstuff2221click the Acquire button, then the first softbutton for Mode, and change it to High Res.
I use the functions on the left side a fair amount for one off stuff i just leave frequency and peak to peak voltages on the yellow trace. It just stays open and works automatically. Fancier functions you aren’t wrong. I have a different model but they have some functions that trigger when your signal varies by a certain percent (masking maybe? I forget off hand). It lets you trigger off glitches and things easily its handy. I used it for example to trigger off an afci tester to see what it was doing or find switch noise on ac, or probe an uninterruptible power supply. You are kind of right about analog scopes. Sometimes i use mine just because it feels nice to use… but if I’m honest there is no practical reason with a digital scope that capable.
I have this scope, and I absolutely love it !!! It came with everything that I would ever need. So good
As others have mentioned, when you have the probe in the 1X position, it limits the bandwidth to something like 2 or 5 MHz I think.
25 years ago, a colleague of mine (who was also airplane pilot) was teaching his son how to drive. Before actual riding, his son had to muscle memorise where any button was and how to use it. The test was: being able to do it blindly with the eyes shut.
The idea is of course to be able to keep the eyes on the road/traffic for safety reasons..
Try to do this with a modern car.
Have you looked at those cheap 30$ usb logic analyzers? Very useful.
Also the more expensive ones usually have a channel or two for analog.
When I had my brief stint at Conestoga College Doon campus studying computer engineering technology the Tektronix digital scopes we were using were easily CA$2000 each and that was fall 2004. With companies like Rigol and Keysight made oscilloscopes more affordable for the average hobbyist.
Great review
I bought that same scope a few months back. When using that parameter setting dial/button...press it in and rotate it *while it's still pressed*, then release it once you've got the selection you want. Little bit tricky at first. And if there's a long list of selections, well, you may have to be a bit of a contortionist - or go back to click/twist/click/dammit/click/twist/click.
exactly how I do. waaaay les finicky
"An analog scope doesn't have a cooling fan"
*My Tektronix 535 scope/space heater is clearing its throat* 🙂
Man, this gives me old AvE videos flashbacks.
All that's missing is a Hakko soldering iron.
My noise issue was the Power Line WiFi extenders that I use. Noise comes in bursts. This noise also caused my cable company to shut me down until we found the offending section of coax cable.
Have you tried an Analog Discovery oscilloscope? It seems like a fair middle ground for those two. I use it quite a bit, it could use the Rigols big buffer. But for digital work it's quite nice. Recording I2C or other digital signals can be set to trigger at not only edges but also acknowledgements, addresses and so on.
you are quite the professional hobbyist.
Pretty interesting indeed, Matthias! 😃
Great tool indeed!
Stay safe there with your family! 🖖😊
Have you ever tried a Picoscope? It's popular in the automotive diagnostic industry and seems like the GUI is easy to use. I always prefer hard buttons as opposed to software but if you have to travel for work you want to consume physical space wisely.
I just got this scope earlier this month, as my first* real learning scope. It was pricey for my budget and I thought of going with a USB scope (because I'm still a beginner), but between the slow response, tying up a PC and the universally terrible interfaces they all seem to have, it just made sense to invest in a real physical scope that would get me reliably through the next few years of learning. I think the Rigol was probably a good choice, and I look forward to watching your videos and seeing it in use as I learn.
Bit of story time: Ironically, after telling my Uncle that I bought the Rigol scope, he gave me an old Tektronix 546B analog 4-channel storage scope that he used when he was an instrumentation technician. It's been sitting in a dusty storage area for a long time and needs new probes and a lot of work to clean up. I imagine it'll need most of it's pots cleaned. The crazy thing is, this old scope is almost too heavy for me to lift. It's a monster!
* Bit more story time: This new Rigol scope is technically my second scope, because that same Uncle gave me a vintage (1950's) EICO tube-based CRT scope when I was a teen, but I never learned how to use it, so I would just hook it up to my stereo and play around with it until it displayed something cool looking. When I lost it during a move, I was very disappointed that I hadn't got around to learning how to use it properly, but in my defense , we didn't have all these awesome creator/educator channels like yours back then to teach me what I needed to know.
Re: selector knob hard to push without rotating:
Instead of using the knob, you can push the same button you used to access the dropdown menu multiple times to select and then press "clear" to close the menu.
I have a Siglent SDS1104X-E which for my money is miles better than the Rigol offerings at the same price point. Hantek and Micsig also have some nice offerings in that range.
Hi Matthias, I have the same scope, I chose the 200MHz BW model because it was a just a few bucks more than the 100MHz unit. I have the same issue with the knob selector, not good for us with high blood pressure. Internal noise, on the most sensitive vertical setting, I have a noise of some sort on the trace, I think you are correct in that there is an internal source. WOW, $500CDN?? Mine was about $375CDN, got mine from Electro-meters in Pickering, ON about a year ago.
With taxes, from amazon, $477 I guess I didn't get a great deal.
Thats where I got mine. They are the only "authorized" dealer in Canada.
Having knobs is important.
First switching converter is the active PFC, the other is the main stepdown transformer.
exactly. Used to be just a rectifier on the input side, but nowadays they have to do power factor correction, so inverters on both ends.
@@matthiasrandomstuff2221 I was thinking that too, and were hoping you were going to see if the PFC converter ran at a different switching frequency than the main converter, and then by the time the video was over, you hadn't measured both, and I forgot about it :)
Nice video Matthias, thanks for sharing. Have you looked into what the SCPI Panel Control provides you using the built in ethernet connection. Apparently you can send commands and read data. Not sure how rudimentary that ability might be, but just curious.
Have not.
I just bought this exact model…… 2 months ago. I was hoping for Matthias review before i pulled the trigger on it but went with it anyway. 🤦♂️
Oh well. In the end, for the money it cost me, I cant complain.
3:27 Doesn't it work to click, hold and drag the mouse up or down to turn the knob? I thought it was convention for virtual knobs like these.
Also, 14:10 doesn't this scope have a LAN port on the back? Nowadays they usually have a web interface where you can "download" a picture or raw data.
On some scopes, you can hook up mouse or/and keyboard via the USB port.
I bought this scope from Emona Instruments, NSW they are really good.
doesn't it have a cable network connection? I used to take screenshots from the scope using the apple laptop over the home network on the older model (1054z). I guess it also supports aquiring raw data.
I find these videos SO interesting and I TRY TO KEEP UP but when you said "high frequency transient", all I could think of was a homeless man that was in the same place every day when I was a kid.
Oh yes, I was in the market for one of these.
My very cheap 200mhz Siglent has a roll button. That's not to say it doesn't have other silly UI attributes, but it does at least have a roll button :)
I ended up buying a siglent SDS1104x-u when I was looking for a scope in that price range. 100Mhz 4 channels. I felt that if I ever needed more than 100Mhz, I'd likely also need way more than 200Mhz, while the extra channels found immediate use.
I have the Siglent SDS1104X-E, and really like it. When I bought it I was choosing between this and a Rigol in the same range.. but found the Siglet to be better value (and better performing!) (also depends on your usecase I guess) But 4 channels is awesome! And I also have used them quite a bit. I also found it quite intuitive to use. Really happy with it.
4 channels can be handy for really complex setups. 2 really matters because that allows you to compare timing of different signals, and usually you can get away with just two at a time. Not ruling out getting a 4 channel version eventually, but have never really needed more than 2 channels.
Now I would like to learn about your home-made? power supply :D There are always many stories involved with the tradeoffs, decisions and learning curves when building those.
just watch the video about it, or read the article about it on my website.
Rigol is nice. I the DS1054Z. Where did you pick yours up? just curious, there is like only one authorized dealer in Canada.
Ordered it from Amazon
@@matthiasrandomstuff2221 NIce! My collection so far is Rigol DS1054Z, OWON 272S, and a Keysight DSX1204G. Although, I won the last one.
FYI, Picoscope is pretty good, at least what I've seen of it. So, don't generalize from this (particularly, laughably, bad UI!) USB scope to all of them. (Note this is more a caution to viewers than a critique of the video.) But it is pricier, and you might as well get a standalone scope if you're budget minded and just need a scope.
What you are looking for is an "Analog Storage Oscilloscope".
But they lack a ton of DSO features.
I would expect the 14 MHz waveform you measured is really just a function of the bandwidth of your probe loop antenna.
Hmmm, coud you save the roll-mode data to the USB, then re-load it into a mode that can decode the data?
my fav feature of most of these is the ability to unlock 200mhz regardless of what model it is:P
You could add a button to the scope for the selection
❤Rigol + chipwhisperer Side Channel Attack
I hardly ever use my Hantek DSO4102C scope. I can assure you the UI is just as bad and awkward. I love my small Tektronix 224 and use it all the time.
It's tiny, silent, ready on power up, runs from a 12V external adapter or 12V SLA battery (I threw the old battery out and didn't replace it), with isolated grounds and channels to stop me from making stupid mistakes.
The Hantek has been demoted to FFT analyzer and signal generator.
you can reduce the "noise" by using averaging.
0:18 Ok that's on you for using an ancient laptop. On the rare occasions when I reboot my PC, it boots faster than that scope. That aside, I have a similar scope and I'm surprised you didn't mention the ethernet port and ability to mirror the screen and control everything with a browser or with SCPI. Is that missing from this model? I consider both to be killer features. The alternative (taking photos of LCDs and screwing around with GPIB) is horrible.
oh, didn't even know about that one!
I have been using oscilloscopes daily since the 1980s. I judge an oscilloscope by how much internal noise is generated with good ground. If I can see noise with the probe ground connected to the probe signal pin, as you have done, and see any noise then I will not use it. If the signal of interest is 1 or 2 millivolts and I need to measure frequencies and phase shifts of a signal, the scope is useless. It will be impossible to trigger. What do you attribute the noisy floor signals to? Otherwise, it looks like a very useful scope.
Internal noise. Even with the probes disconnected, it's there.
There needs to be a modular system for creating physical UIs with knobs, buttons, sliders, lights, etc. that connect via USB to your PC and can be configured to control existing software.
doesn't really make sense. The existing software would have to be modified to work with knobs like that. Some high end cad and editing software does use knobs thoguh, but it comes with those knobs.
@@matthiasrandomstuff2221 It could control existing software by emulating a keyboard and/or mouse. Which is already doable, but AI should make it even easier in the near future.
@@jej3451 what you describe already exists and is used heavily in music software (DAWs)
@@PabloEdvardo Got a link? I'm not finding modular systems, only giant pre-made mixer/control boards.
I’ve heard you say before you worked at RIM. I’m curious if we will get your thoughts on the new RIM movie Netflix is making?
Trailer is very cringeworthy. I think it would be a good topic for a video once the movie comes out. May have to temporarily subscribe to netflix for that.
For (far too long) I was frustrated by trying to turn a setting on a screen with a mouse,,, only to find that I could click on the knob and just slide the mouse up or down to turn it.
Nice Video
Would a Keysight be better?
Speaking of your old life in tech, have you seen the trailer for the new BlackBerry bio movie that dropped a few weeks ago? I’d be curious to hear your thoughts on the movie once it’s out.
Trailer is very cringeworthy! Portrayed characters in no way remind me of the real ones!
What is the deal with just grounding the probe to pick up magnetic signals or is it a special probe?
Acts like a loop antenna. Switching PSUs generate a lot of noise so it's not that hard to pick it up. Also, the scope has around 1MOhm input impedance so the loop isn't shorted
it's not the case for this instrument, but a long boot-up time and warm-up time is kind of the norm...you wouldn't trust a critical instrument from a cold boot because the reference isn't warmed up for instance.
HF noise the scope picks up is likely your wifi, phone, bluetooth and radio signals since the probe functions as an antenna. And due to the high speed dac you pick up quite a lot of noise. If you'd use a terminal directly on the scope you'd probably see a lot les noise. Scope nouse is in the order of 10-20 mV. Looks worse than it is. On analogue scopes you see far less noise due to the slowness of the phosphor in the tube.
As others have mentioned you can put it in high res mode, or you can reduce the buffer size. It tries to overlay multiple waves but with non cyclic waveforms it becomes a noisy mess.
I think this one should have an ethernet port, you can use it to capture data quicker than usb. There is also free scope software you can use. The rigol software is unusable.
noise is present even with probe disconnected
@@matthiasrandomstuff2221 but is the terminal shorted to ground when disconnected? And more than say 20mV? HF behaves weird though. Eev has some good videos on why digital scopes seem so noisy.
@@imqqmi phosphor
@@PabloEdvardo coorrected, thanks!
What do you mean by the pc is not usable?
Hi
I have bought the same one and it is very noisy,and fan works continuously
What about your?
Thanks
yes, the fan is annoying
Does that scope just run windows in the background? At my job I got a kick out of playing windows solitaire on a $5k scope haha
I don't think so. maybe linux. My handheld infrared camera runs linux, and it takes even longer to boot up.
I can confirm that the boot time does not get better with higher end scopes, opposite actually. I regularly use $50K Tek scopes at work and they take a solid 3 minutes to boot. Every new generation of scope gets worse.
I don't own any digital oscilloscope. But at 06:40 you are complaining about the zoom which always zooms into the right edge of the screen. When I look at the screen there is a little yellow triangle at the top of the screen. It looks like some kind of cursor. Can you move that left or right? Maybe it just always zooms into that cursor and you only have to move it to the middle of the screen. 🤔
I can't just drag that triangle with a mouse, not sure how it would be moved.
@@matthiasrandomstuff2221 That's the horizontal trigger point, you can move that with the rotary control at the far right.
Knobs: yes yes yes!
I set my old ThinkPad up with a new solid state drive. It now bits super fast.
If you have a mouse with a scroll wheel, can you use it to operate the virtual knobs of the USB scope?
Have you thought of replacing the hard drive in the laptop with an SSD. I did this on an old DELL Inspiron 17 N7010 laptop dating back to 2012 and booting is much, much faster.
yes, thought of it. Replacing the hard drive is the easy part. Setting everything up again is not.
@@matthiasrandomstuff2221 Just image the HD directly to the SSD, and expand the partition size after to take up the whole drive - job done.
@@gorak9000 yes and no... you need to make sure the cloning software is aware of 4k sector boundaries
@@PabloEdvardo 4k sectors have been the standard for over 10 years now on disks and SSDs - wtf ancient software would you be using that doesn't know about 4k sectors by now?
Hi,
Are you an engineer by profession?
nice cheap scope, had some fun with the 4ch version, a little lacking on the screen side (size, gui) but does the job.
iirc, math mode on this model is a nightmare.
btw, you are not supposed to turn off measurement equipment anyway. Some scopes even tell you that the measurement isn't fully accurate until 30m of warm up
I think the people that need that level of accuracy aren't going to be using one of these scopes. That sounds more like something for a scope with a heated crystal that needs to reach equilibrium.
I suppose. Like spectrum analyzers with an ovenized crystal. But nowadays they just all get hooked up to some GPS based time reference.
@@matthiasrandomstuff2221 I think it has more to do with their internal voltage references
I think that scope has an LXI interface in the back. With that you can with ethernet just download the raw data of the waveforms, measurements and also a copy of the screen. I have a set of emacs lisp scripts to connect to LXI instruments. I've pending to upload to a git repo...
The knob problem when you push it is a pain in the neck.
I cannot imagine the meeting where they decided to emulate analog controls in a digital UI. By doing more work they made the product less functional
I would imagine there was no such meeting. Rather, some software lackey was told to make it look like a scope, and nobody thought much about it.
get an ssd. i'm on my 2013 year Lenovo T430 and it would kick ass of many current laptops(mine is slightly upgraded)
That scope doesn't have ethernet on the back?
It does
It does, just I never played with it so didn't think about it
@@matthiasrandomstuff2221 It has remote control like your usb scope. But it's not the greatest. You can grab data via Ethernet or USB to your computer.
хороший аппарат
Damn it if i finish this video im going to be shopping for an oscilloscope....
get a cheap USB one. It's cheap and kind of gets you part way there.
@@matthiasrandomstuff2221 Its all your fault...... DS1102Z-E just arived today.
As an engineer that has built many embedded systems with user interfaces, I am astounded and frustrated by the multitude of awful designs that exist. I can't understand how these systems ever passed even the most basic testing.
Frustrating cases from my life:
Our microwave has a knob with a rotary encoder. Sometimes you need to select between two modes by turning this knob. A sane design would have, say, clockwise switching to manual and anticlockwise switching to auto. But no, it cycles between modes on each single increment of the encoder - requiring miniscule movements of the knob to achieve the desired setting. At the very least, the encoder ought to have been scaled down - either would have been trivial to implement.
I have both a Gps and spectrum analyser that both have very laggy interfaces. Processing user inputs and confirming them ought to have the highest priority - but on both of these devices, it is the lowest. This means that you have to wait a second or more after each button press for the device to catch up, otherwise you find every second press has been lost or misinterpreted...
Finally, my phone has a screen "auto rotate" facility which is completely useless because it has absolutely no hysteresis, so it is prone to switching back and forth rapidly when the phone is on a table. To make this worse, it buffers all user input and doesn't empty the queue when switching orientation. So, you get a whole bunch of (potentially disastrous) incorrect selections made once it settles in the new orientation.
It is always astonishing how basically good equipment can be ruined by trivial oversights. Like some elaborate instrument, full of ASICs and multilayer PCBs, yet the power supply is such a mundane, poorly designed piece of rubbish that it leads to the premature failure of the whole system.
I've blown up thousands of dollars in equipment with an oscilloscope. I hate those things.
by inadvertently grounding stuff?
😂👍 I dislike this type the most because I don't understand it, but I still watch it hoping I can find a modicum of information
You... actually spent money?
I know. He should have made an oscilloscope out of some wood he found in a dumpster.
You're dead right about pc scopes. I have a Picoscope and a Rigol. Although the Picoscope is technically better, using a scope via a mouse is a PITA and like you, I only use it when I have to!
A high frequency transient is a homeless person screaming!! lol
Regrading affordability for hobbyists, how about KiCAD and dirt cheap PCBs out of China.
Was a Hacker News article on that subject this past week. PCBs that is.
What about them? That's not new or newsworthy, that's been the standard for years already. KiCAD gets better and better, and the boards from china get cheaper and cheaper (as long as you stay away from pcbway - they do so many sponsored youtube videos because people woudn't go to them just based on price to begin with when there are much cheaper options with the same quality) - it's win win all around
@@gorak9000 Not sure I understand the 'what about them' comment but I've used Seeed Studios a number of times but as an engineer, we would spend from many hundreds of dollars to well over a thousand dollars for a few prototype PCBs. I think my last order at Seeed was somewhere between $22 and $26 for 10 pieces to my door. Granted they are fairly simple boards but it sure makes doing SMD at home easy.
@@gorak9000 yeah it's a win until China does another bio attack on the world. Don't think the last one was an accident.
Hobbyists "like you". While you may be doing it as a hobby, I would not consider the quality hobby-grade...
If you put linux on that old thinkpad, it would be blazingly fast, not crazy slow like it is now with winBLOWS
Yes, and completely incompatible with the scope. So then I'd have to get another windows computer.
@@matthiasrandomstuff2221 Chances are the scope software runs under wine. I run a few things under wine that talk to usb hardware, like the xgpro software for the ubiquitous XGecu eprom/eeprom programmers - works just fine. I also run tools like Sim68k which emulates a MC68000 processor which is only for windows under wine just fine (and that's not like a mainstream piece of software, it's just some obscure thing written by an individual that needed a 68000 emulator). You already use a lot of linux on raspberry pi's, but full linux on a full machine is so much better than any raspberry pi ever could be!
@@gorak9000 ARM Linux is full Linux it just isn't x86. Linux runs on more ARM hardware than any other platform. Really Linux has been a segment use failure in the PC realm. The way things are looking my next PC may be ARM.
@@1pcfred The CPU architecture isn't the problem - ARM, x86, the various other architectures you can get precompiled packages for, it doesn't really matter. The problem is low memory and low single threaded cpu performance on any raspberry pi, and slow storage write speeds. Even a 4 year old i5 with a cheap nvme ssd blows the best raspberry pi out of the water for performance. Using a raspberry pi as an indicator of how a full-fledged linux system operates just is not a good use case. That and raspberry pi's are hard to come by sometimes, and expensive now for what you get. You can get an ultra small form factor used desktop with a 256GB or 512GB nvme ssd, 16GB of ram, and a relatively recent i5 or i7 for $150. You'd pay that for a raspberry pi with less memory, a shitty sd card for filesystem, and a weaker processor by the time you buy a power supply, case, a stupid micro hdmi cable, etc etc. They're just not good value for money.
That and also one of the things I would expect might be architecture dependent would be windows emulation through wine - you might run into more problems running wine on an ARM than on a real x86 machine - but I haven't tried it myself, so I'm just (somewhat educated) guessing on that one
Matthias, Matthias ... your train is long gone. I use to like your videos once upon a time.
well, best to drive your train way outa here then.
This reminded me of a SHORT I've seen recently warning against use of phones WHILE CHARGING. They demonstrate with some sort of current detector how using a phone while charging pushes current out through your body. I would LOVE to see YOUR in depth explanation of that video.
Not worth debunking that sort of bs. People come up with it for clickbait all the time.
@@matthiasrandomstuff2221 gotcha...thanks
@@rolandgdeanLearning how MRI machines work and how strong those fields are compared to the things you interact with in normal day to day life should give you a good point of reference for how worried you should be. The main way this type of energy can cause harm is by heating you to the point you get burns, and if that was happening you would actually feel hot. Exactly like how sunlight feels warm, because radio waves are just light where the photons have too low of energy for our eyes to detect them.
@@matthiasrandomstuff2221 well, there is something to it. It happens when there's no isolation between the primary and secondary side of some PSUs. Some of those chargers are just that bad. What do you want for $1.99?
Some chargers are isolated only by a capacitor and if the cellphone is metal which most are, and the charger is not isolated, it can be risky.
The USB version of that scope is terrible and needs a ton of work. The scope is really nice… I love it