Hi A while ago we took a look at this $70 hundred megahertz as pocket oscilloscope from Thirsty or Nursey. However, you want to pronounce it fir see a Chinese company and it will. It left a lot to be desired, but no, it was 70 bucks. that probably had some nice use as well.

They've sent their latest whiz-bang one. Check this out for twice the price are still a ridiculously cheap hundred and forty hundred thirty-eight Yankee bucks delivered. This is their new dual channel touchscreen. A hundred megahertz.

sort of like tablet E-type scope. even. they're not quite sure what it is cuz if you have a look at the manually, it's the two channel plate oscilloscope. You're good test tool or is it a table oscilloscope? which is what they've got on the box.

I Don't know a table oscilloscope plate oscilloscope tablet oscilloscope. Anyway, it's thick as bro look at that. But let's check this out because a lot of people are interested in these low-cost scopes. I mean a hundred and forty bucks? Even though it's ridiculous, the amount of performance you get being per buck you get in a modern like a four channel sub.

400 US dollar oscilloscope like your regular bench oscilloscope. Absolutely fantastic, but some people of course still don't want to spend that much. And if you're doing a lab on a budget I've done videos on that, then these low cost things. for a hundred and forty US dollars, this looks like to be vastly better value then the little pocket thing we saw before.

So anyway, let's check it out. Hopefully this one's um, yeah, a lot more usable than the last one. actually. they're really not sure what this is.

Is it the table oscilloscope? Is it a plate oscilloscope? or is it I Just noticed a flat oscilloscope. Your channel flat oscilloscope 100 megahertz, one geek sample are per second, two channels 800 by 480 as a capacitive touchscreen. Now that resistance rubbish. the three nanosecond rise: 240 K memory depth, which is more than enough you need on a portable scope like this.

No worries whatsoever. Although it does claim to have one gig of memory total. So I can store up to a thousand screens plus a thousand waveforms and you know stuff like that. But yeah, whatever, and 50 millivolts to 500 volts input.

Well, you're not gonna get 500 volts unless you get proper probes through it. Anyway, in Times 1 mode, it is our 40 volts rated. So yeah, to get you 400 volts rating, you actually need to use the Times 10 probe with it. So you got the external a divider building.

Six thousand milliamp hour battery don't know what that is in what hours and standby standby time. A usable time of four hours. So the claim: I won't be testing that here. It's not a bad form factor.

I Rather like it I'm not. don't really like trying to get this up. it's almost impossible. Nice and neat fits on the bench.

don't know about the probes coming out and top probably would have been better on the side, but yeah is what it is. And on the top we've got a real clunk and power switch. a microUSB people who would like to send us BC these days, but near lovely USB Micro fanboys out there. We've got a one kilohertz test signal on here.

noise for a compensating year times 2m Pros: Just two inputs no our probe detection of course 440 US dollars. You wouldn't expect it over I guess over load I Guess is that like some peak I Don't read the manual. Hang on. Anyway, this thing is a thin R&D weapon.

It's anti Burnage humanized. It's hydromatic. Why? it's greased lightning and it counts with two switchable times. ten probes supposedly hundred megahertz.

You know they adapt. They seem okay. Remember this: one hundred and forty bucks delivered with probes ie. Wow And as with the previous one, the manuals been how you doing anyway.

I Can't find anything about what that over lead is. Leash I Use graphic display function Cat What? I Don't know. Is that some sort of new method? anyway? Um, this is a flat panel oscilloscope. Yeah, they could stand to improve their manual, but anyway, it looks to be of course, a vastly better user interface than what we got on the previous little pocket thing.

As you'd expect with you know, a large 800 by 600 touchscreen display. and yeah, they got you know, analysis of common problems and and stuff like that Commons circuit test methods and they've tried that. sort of. you know you had crystal measurements exactly like we got before I Believe you know.

Okay, any weight, enough mucking around. Yes I will do a teardown, but let's turn it on first. it's the 10 13 d by the way, for those playing along at home and fur see and that boots up pretty quick I like that. sorry I'm gonna have to fix the glare.

Unfortunately is very glare. You can see my camera there with my microphone and whatnot. There we go if I move it over here I've got mostly wall or reflecting off the background there, but let's let's have a look. Yep I I Thought we might be able to move him and we can just drag the waveforms so that's pretty neat.

So there's the interface that we had before on this thing. It lifts a lot to be desired. This one's up much better. It automatically defaults to your Peter peak and RMS and frequency and stuff on there, so that's really quite nice.

Channel 1 and Channel 2 They almost physically line up 10 microseconds per division like it would have been nice to have at least some manual controls, but if we want to change I mean we can I presume we can pinch? No, no, Well, that's disappointing. I Expected to be able to expand the time base instead. all I get is moving so that's hugely disappointing. Move fast.

Gotta go. Like how do you change the time base? What? I Want to click on that? Wait, how do I change the time base? Channel One: Okay, there we go. We can pop down the channel one menu. Channel one off on or off open.

FFT Okay, so you turn your FFT on from your channel menu. Okay, well nothing popped up. Couple in AC or DC coupling and the probe mode times 1 times 10 or times 100 so that's handy if you did have a external times 100 high voltage probe. So yeah, with 50 millivolts are per division minimum then like on times 1 then really, you're not going to be able to get really low-level stuff on this.

So of course I haven't read the manual because you shouldn't have to. You should just be able to turn on a scope and it should work intuitively. And sure enough, you know you tap on entire channel 1. But how do you change the volts per division setting like I can't pinch and zoom but I haven't figured out how to change the time base yet.

and once again, I haven't figured out how to change the vertical. Let's have a look. what's in the menu system setting Picture View Waveform View USB Connection: Ok, not too concerned about that grid brightness okay, baseline calibration Like it looks like these controls over here are permanently here and like, okay, you've got, run and stop up there. Why? you just wouldn't have it over here? I Don't know, but okay I Plugged my probe into the 1 Kilohertz.

let's try our auto set, shall we? Oh, by the way, you can hear the relays clicking which is nice. it's got input realized. Wow Really, it can't even auto set a 1 kilohertz calibration signal. Are you kidding me? Wow that that is a complete and epic fail.

Oh oh, it's so much hope for this thing. Oh I Figured it out. Look just by bumming around. Control Volts.

Plus - well, you know it's easy once, you know. But gee. Ok channel - geez II Can barely even read that. it says channel channel 2 there I Yeah, the reflection is just bad in the lab here because of the angle of the bench and the lights and stuff like that.

but the screen is really quite. We got trigger menu, auto trigger see I like why do they have split the words up like that? that just looks ridiculous. normal single or it's just no, that's just our triggering Channel One: let's try auto setting. Our auto set works but you've got to select the channel one.

it can't or do across channels. okay but it should have like it should have din more on that. but oh there we go it auto set differently this time Wow Hopefully you heard the relays there. Oh I didn't choose that time base to begin with I Don't know.

Hmm. Inconsistent auto set functionality. Anyway, has set the trigger to the middle so we can actually adjust. How do we adjust our trigger level? Can we just drag? I'm dragging it down look and it springs back.

Why? It's like an auto 50 percent trigger level and it always chooses if you can't override it. What? Maybe you can do it in normal mode? Perhaps let's go to normal mode. Ah, there you go. Yep, Is that the same as the other one? Yeah, you've got to choose normal trigger mode in order to set the trigger level.

That's not how other oscilloscopes work. that's just that's just wrong. And really for single-shot mode, like I Would like to see like a single shot button here. like a run stop single like cursors like bury those away.

Okay, so we run in now and so you can see it. updating there. Why it can't get the frequency of that? Like why that is the easiest signal possible to get a square wave like that. We got more than enough divisions on the screen.

Anyway, if we stop it right. the thing is, we've got 240 K points of memory. It looks like it's got some data outside the screen. What got two screens worth? or something like that? But 240 K points is a a fairly decent amount of memory for a scope, especially for this price.

It's more than adequate for most tasks, and I Still haven't figured out how to use it. Horizontal time base. Why am I flatline? Is my signal suddenly vanished? I'm a continuous one kilohertz signal. Move fast, Move slow.

It's what's this ripple on the top? What is all this garbage like? This is some sort of a listen. So eight here. the time base increases the key area. that is the way from his push horizontal in the streak.

The area to the left of the center line is the key area. What? I Got it? Look, you've got to tap over here. on this side. 200 microseconds per dat.

Whoa. It's not even. It doesn't even respond properly. And tap on this side is it? So that's going up in your time base but doesn't always respond and then tap on this side of the screen.

presumably anywhere, but it doesn't respond most of the time. Wow and I'm in fast mode. Don't move I Seem to be in a sweet spot. Am I here? We go? Here we go.

Oh, it's ad wise it would you see that that waveform shifted? Wow. this is just. this is terrible. Muriel Okay, it seems to be reacting now why it wasn't doing it and then, yeah, it's some aliasing thing.

Okay, now it seems to be operating okay. either side of the center line there seems to do it. so if you accidentally touch it, you're gonna change your time base. But anyway, look right.

let's assume we're gonna do 240 K memory. Let's stop. And then, ah, there we go. We can zoom in.

Okay, there we go. great. And then we can. Oh look, we can't.

We can't zoom in and see the rest of the data. That is ridiculous Why? it only allows us to shift like two screens worth. But I can go up like that. Okay, cuz that's where we.

That's the data we sampled. a When you zoom in, you can't then scroll through the rest of it. Why? what? What sort of limitation is that? That's just nuts. That's a real shame.

It's a decent usable amount of memory. No. I just don't like this at all. And how do you reset your horizontal? I I Just don't know.

You just got to drag it I Guess oboe did I get rid of it there? No I just got to drag it back to the middle Like yes and I'm getting once again, much more responsive control out of it now. So I'm not sure what the deal was before, but anyway, yeah, look yeah, we're not exactly centered on our thing and if you try and move it, drag it that way. It just drags the entire waveform really. so.

Oh, and also, there's something very strange with the one Kilohertz test signal. It is not from ground here. And yes, I Have verified this on benchtop scope and you put it in AC mode. It doesn't automatically change, you'll to get out of the menu and then it goes into a Simo.

But yeah I don't like how it all shifts around. Unfortunately one of the problems is is the limited volts per division up here and this is as low as we go. So I'm feeding in a 1 volt P2p signal and that's the best we can get that you know it can't go any further than that. So yeah, this is not for low-level signals and the single-shot mode is just like silly.

I mean Auto don't even update while you've got the Menu on and you just because you don't have a dedicated single-shot button over here you go there and it stopped at waveform updating so you can go into single and and it doesn't like oh I think it just might have updated things so a bit of waveform change over here. but yeah it's just its usability. just leave so much to be desired. really.

Then if you go into measurement here you can choose to channel 2 and channel 1. Why? it's like swapped like that I don't know. it doesn't match everything else. bit crazy.

Anyway, you can turn on various things and it will add them down to the bottom here so that's kind of cool. but unfortunately they're not transparent so it overlays your waveform and I Do believe you can just save pic like that so you can just screenshot it and it will save it internally. It should appear as they drive when you plug in the USB and it's got a similar like picture view and waveform review. It's like these are just different screenshots so you can actually call them up like that.

It's It's a bit rudimentary, but it's there. Ok, so I'm just doing the baseline calibration here before. I Do some more performance tests on this thing to see if it really does have a hundred mega it's been with because if you saw last time, it did but there are a lot of issues with it. So I'm still go on.

Okay I've been waiting for like five minutes or something. This is getting ridiculous. I I Think it's locked up. Okay, so test the bandwidth with a 50 ohm load directly on it.

We're in Times One mode here at One Megahertz. We're getting our two volts peak-to-peak so we're looking for where it drops to one point one four volts. If we go up, let's change the time base. It's not doing good all right.

Let's call that about 22 megahertz. So the claim of a hundred megahertz is absolute. BS Of course if you read the manual that says all you've got to use the Times Ten Pro Bla bla and it doesn't matter By the way, whether or not you have it on x 10 position. that's me.

and that's just going to change is scaling down here, the front end and log bandwidth direct signal in is only 22 megahertz 3 DB down. And they give you a solemn reminder: the bandwidth of the X 10 one probe file is 5 megahertz. Yes, I've actually done a video explaining why X 1 probes only have a like a 5-under 10 megahertz bandwidth. The bandwidth of the timestamp probe file is a hundred megahertz.

When measuring higher than five megahertz, you need to turn the switch on the probe to the tight end position oscilloscope. Otherwise, this even we were greatly attenuated. This is the case with the SIL Scopes bla bla bla. Ok, let's try and calibrate this thing.

So I'm feeding in a one kilohertz square wave. I've got a 50 ohm terminated load here and I'm using a proper BNC adapter. We're on times 10 I'm using this supply the probe so everything's hunky-dory I've given a tweak at the correct tongue angle so we should be ready to go and we're supposed to be 3 volts peak-to-peak we're getting 3.2 Yeah, Ok, let's just run with that I can't get any better. It's just that's what it is.

And check this out. We're getting the same interleaved sampling problem that we'll get in on this cuz this thing did not have the claim 500 mix sample per second sample rate and I I Think when we do a teardown of this, we'll find this one doesn't have the claim one gig sample per second either and that's how they get. In a way with the cheap price, it is not a true 1 gig sample per second as they claim down here. anyway.

I am now feeding in 5 volts peak-to-peak at a hundred. Well, that's a hundred megahertz. Okay, look at it going, silly buggers. If I go to 101 megahertz, it's nice and stable.

If I go to 100, it's weird us to know If I go down to 99, it's stable. Look at that. So there is some interleaved sampling weirdness going on there. Whoa.

We've got some peak there. Look at that at fifty Meg 60 Meg Go down, go down forty. Meg It's just yet. it's all over the shop.

That's terrible. Muriel That is just weird. Go 200 megahertz and yet that's the fastest time base we can get it and it just it does not like that at all. Yet, go to 101 Megahertz and we at least get our sine wave and then it will eventually taper off.

No, it's it's just ridiculous. It's it's almost a joke. If you want to look at the Alst and we're at 101 megahertz here, the fastest ten milliseconds per division can't go any faster than that. We go down.

It's okay, we go there my become a gutter and then of course it's the wrong frequency because there's OLS in. So yeah, and I'm at forty three Megahertz even though it's showing only 400 of these shows 43 occasionally there and watch this. if I jump up to 44 boom, look at that amplitude difference and that's exactly what we found on the pocket One Two. It had the weirdest response: No, it's not my CD and that's been confirmed with direct coax connections and all sorts of stuff.

So you know it's not the probing system, it's the scope front-end itself. The little pocket one worked exactly the same way. So I think when we do a teardown of this, it's going to be almost the same sort of our front-end and sampling system. On this, they've just got a much nicer, gooey touch interface.

And yeah, it exhibits that same weird thing at exactly hundred megahertz that we saw on the other one. Ninety Nine Megahertz. A Hundred megahertz. It just comes and guts up.

We're in auto mode. One hundred and one megahertz works fine. If we go into normal mode, they'll do exactly the same thing. Just comes a gutter.

Yep, there's some inally sampling. it's this is not one gig sample per second. Yeah, you'll find this is much lower. It's doing inless interleaving sampling and it's not true real-time sampling rate that we've been used to in modern scopes for the last twenty years.

This is how they get the cost down. So inside this thing that we do actually have some changes, check this out. We've got an out error cyclone for here. We've got an internal Westar micro SD card slot so that would be noisy that I contained the firmware but I suspect it might just be the the waveform memory stuff like that.

So whereas before we just had an ARM processor in the thing but in the rest of it, there's our battery up there so you could actually fit this with a larger battery if you wanted to, you know, increase our the capacity. That'd be nice. So one of the other major changes is of course, aren't we've got a dual ADC down here now. Once again, looks like they've rubbed the numbers off this thing, but somebody did a reverse engineering on the previous pocket one and it was an analog devices 1890 to 88.

So yeah, it was nowhere near the sample rate that they were claiming. So what are they actually running up here? They've changed it. Aha, that's an all winner arm process of the F1 see 100s. I'll try and put up a datasheet for that.

but yeah they've They've changed that from the Esti arm that they had before. So so that's controlling the LCD interface. You can see that there and they've just got you know like an 8 bit data interface or something going over to the Cyclone over here which was which is the acquisition engine. Sure as you can see the ATC's can't see any markings on those at all.

So the front nd here is that certainly changed from the previous one. I'll put up a side-by-side shot here of the old pocket one. This new one actually has three mechanical relays here and it doesn't have the whole bunch of us switching trainees that we saw before, so they've They have actually changed that. but I'd suspect that the ADC is exactly the same as they are using before.

but yet it has changed. Unfortunately of the front-end seems to still have that weird peak in it and it's look, know these things like a you know, twenty thirty megahertz scope. Alright, let's probe the clock on this thing. Let's assume it's an 1892 88 or clone equivalent.

So that's Pin Two 47 over here. and Pin 47. There you go. Wah Wah wah wah.

That's a hundred megahertz sample clock. It's got two different clocks. One for it's a dual-channel 100 Meg Sample ADC because this is supposed to be a hundred Meg Sample ADC assuming it is that exact one. but anyway, it is running at a hundred make samples per second.

There are two different clock lines here because there's actually a dual channel ADC And yes, I'm on ten nanoseconds per division among the highest sample rate. And if I change, that will see the clock change. But I've already done that on the Pocket one and it's exactly the same thing. So yeah, they're lying.

This is not one example. Well, it's one example. effective sample rate or equivalent time sample rate as they used to call it back in the old days. But yeah, ever since the Tektronix Tds 200 series scope was that 25 years ago now or something, or jeez, it's got to be pushing that.

They were a genuine one gig sample per second for 100 megahertz bandwidth, you know, ten times higher sample rate than analog bandwidth. And yet, no, this is not a real time Let's go. This is why it's You know it's useful for pretty much anything over like you know, 20 30 megahertz? something like that. Yeah, I mean you've got to have a really good triggering system to try and get equivalent time sampling.

Of course, you really ultra-high expensive, high bandwidth. you know, scopes like you know your twenty gig bandwidth Scopes and things like that though I usually operate on equivalent time sampling, but they're got spectacularly good trigger systems and everything else. And this thing. no, it's just built down to a price I've just got an all winner process we're going to now.

Terror Cyclone for FPGA here with the sample memory in it and just some chair. Too cheap, possibly clone 100. mmm example per second? ABCs And they're trying to do in a in a live sampling on this and they're just coming to gutter. but it's actually gonna be 200 make samples per second.

Why? Because each one of these ad C's is a Joule 100 makes sample ADC And they've got two separate clock inputs. ones on this side and ones on this side Over here. here's the analog input. so if they're driving both our clocks here, you could actually drive them out of phase to each other so that you effectively get a 200 make sample per second.

ADC You've just got to feed the input channel into both. And sure enough, here is the output of this Op-amp up here which drives that just looks like it's jumping under there. It's going across here and it's going through this resistor here into you. Notice one of the inputs here and sure enough, one of the other inputs here.

so they are driving and using both channels of that ADC It does seem to be an identical pin out to the 80 92 88, but you can see that the other one. It goes over to this channel here. So yeah, there you know. In theory they could actually are combine the two if you went single channel, but I don't see them doing that whatsoever.

So I feed it in a 1 megahertz signal here into Channel 1. I've turned off channel 2 just to see if it can actually use or for a DC's on the one channel. but no, it can't. It's physically, you can see it, it's not feeding.

I've got a 1 mega, it's test signal there. It's there, but it's not on the other a DC input chip. so they're not linking the signal from one channel to the other to utilize both a DC's So yep, sorry 200 make samples per second. A real-time sample rate? That's it.

Good per channel. That's alright. and look, I won't even bother and go in and check out the FFT and other you know little functions and things like that. It's like me, this thing is really built out of price.

You're getting exactly what you expect from a hundred and forty dollar U.s. dual channel portable scope like this. you get what you pay for, it's built down to price. You're not getting your true one gig sample per second so you're not to get you true 100 megahertz bandwidth and the front ends a bit how you're doing and it's a response and performance and stuff like They note this thing once again, just like this pocket one here.

it's a bit of a toy and well just like this pocket one for twice the price. You do actually get two channels and 200 makes sample for second channel. So as long as you limit this thing to say I say it's like twenty or thirty megahertz bandwidth then it's probably okay. But it's got like software issues is like that triggering things and an automated frequency doesn't work properly and they actually tell you that in the manual of how to get around it and make it work and things like this and it's just the hard way is fine.

like I Really like the form factor and the user interface is okay. yeah it's it's just got no spit and polish whatsoever and it really good base hardware for like a dual channel portable 20 megahertz scope, It's pretty fine as long as you don't want to do low signal measurement. and maybe if somebody could come up with like an open-source software for it to make it you know a bit better and stuff like that, that would be nice, you know. I It's disappointing I Expected them to add more spit and polish to it over the the pocket one, but obviously they couldn't do that.

For the price yet and you really don't expect it, you can't expect miracles for 140 bucks delivered it. It is what it is and hey, it's a kind of a real handy tool if you're after like a dual-channel portable little 20 mega scope. and you've If you've only got sub hundred and fifty dollars to spend and you want to scope it, you know if you're a beginner it's probably gonna do alright. So yeah, as long as you don't expect much from it and you get to know it's you know quirks and limitations and things, then it's a neat little tool.

anyway. thank you very much First for us sending that one in I mean like as an oscilloscope, you can't give it a thumbs up as a recommended thing, but as always, bang per buck. Is there anything else on the market for a hundred and fifty bucks in a portable form factor like this? So yeah, you've got to make up your own mind whether or not you know this thing is suitable for your needs. And certainly if you only got 150 bucks, well, there might not be anything.

Betty Can maybe argue it like a Pc-based scope. Perhaps might give you our better performance for the that sort of low-end price. but then again, it's not. Doesn't have a nice little compact form factor battery-powered touchscreen 7-inch job' like this.

So yeah, it's certainly an interesting option. I'll Lincoln first sees Aliexpress store down below because 100 lights. Amazing! We can get four hundred and forty bucks. You would have killed for this 20 years ago.

Yeah, a bit more spit-and-polish would have been nice and I just don't even market it as one gig sample for second hundred megahertz. It's just it's just ridiculous to even try that. People would be happy if this was marketed as a dual channel 20 megahertz hundred mix sample per second thing. with all the battery powered and the touchscreen and bit more spit-and-polish in the user interface and it'll be a total winner.

So yeah, anyway, let us know your thoughts. down below. it's an interesting device. A hundred and forty bucks anyway.

hope you enjoyed it if you did. give it a big thumbs up. And as always, discuss in the comments down below or over on the Eevblog forum where I'm sure everyone will be talking about this thing. and yeah, like analyzing the hardware and stuff like that.

I put in some old post some high-res photos over and the Eevblog four on thread for this one. So anyway, hope you liked it. Catch you next time.