I have it and I recommend it. Perfect tool bag scope or hobbyist scope. Just used it last night to verify some chips were working.

Most useful part of the review was demonstrating use of the instrument in real world scenarios. Thanks for that.

I was just looking for a beginner scope. Thanks for this review

As you have shown it seems like a reasonable go / no go indicator in troubleshooting analysis. Thank you.

I had bought an old o-scope a while back out of curiosity. I've learned many things from you and wish you would do a video on how to use an oscilloscope for dummies. I'm afraid to touch mine.

@Jedda73

Жыл бұрын

Dave Jones at EEVblog has a play list on using oscilloscopes including a video titled "How not to blow up your oscilloscope" that you might find helpful

@LearnElectronicsRepair

Жыл бұрын

I've been asked a few times to do this - I will make a video shortly 🙂

@MetalMann-de3xi

Жыл бұрын

@@LearnElectronicsRepair I would definitely appreciate that, would love to see how it would help diagnose something like distortion in a receiver. I have a vintage receiver that has distortion is one channel. I attacked all the transistors and capacitors and changed them. Built a signal probe and can still can't find the issue. Turns out that the o-scope I bought isn't working properly either, the screen has a huge fuzzy green block on it.

@MetalMann-de3xi

Жыл бұрын

@Mr Guru turns out the o-scope I bought (Tektronics 2213A) isn't working properly. It has a huge green blurry rectangle. Have to figure out how to fix it first :(

@MetalMann-de3xi

Жыл бұрын

@Mr Guru My issue is a few vintage receivers I have that have distortion in a channel. They've all had capacitors and transistors changed out. I even tried using an audio probe to find it with no luck. Problem with the audio probe is that I can only test positive signal. I've read on some of the factors that could cause my o-scope to do what it does. I considered getting a new one before I decided on it. My guess is UPS flung it around during shipping because it was supposed to work, or, I got duped.

Nice video real world examples as always that make sense TY

very cool nice finddd!!

I bought that exact scope about two years ago and even though I have not had a chance to use it much due to some health reasons, I do like it a lot so far. Another KZreadr did a review on if it is really 110 MHz and he proved that it was. This is what initially made me buy it. I think it cost me around $80 at the time. Well worth the price for what it does! 👍👍 PS: I didn't know that the firmware could be upgraded on it. I've got to check into that maybe.....🤔 I had to download the manual which is quite common with many (most?) products today anyway. I don't think that mine came with the alligator clip connectors, though. Damn!!!

Good review !...cheers.

I’ve got the FNIRSI 2-channel bench oscilloscope. They’re only around £120 & I have to say I’m really impressed with it. You can store waves & screenshots on it too. This company is really making electronics accessible for hobbyists on a budget. It’s also USB powered, there’s no earth connection on the supplied USB adapter (it needs a 2-amp supply, so they give you an adapter) so I guess that’s isolated as well. I suppose I could run it from a suitable power pack if I wasn’t certain, but it should be completely isolated as is. It’s not their 7 inch touchscreen one, that’s even cheaper, but I didn’t go for that one at the time, I wanted one with knobs & buttons.

Thats good news. I need one as all the others are above my purchase

Oscope is the single most valuable device for the repairmen. Good review!

great review :)

Bought a similar one just a month ago but I still don’t have it! Hope your review is positive, thank you for the video Richard!

Handy oscilloscope, think I'll buy one of these, my mixed domain Oscilloscope registers everytime you turn it on, so one of these would give my less turn on time for small quick measurements.

Always wanted an Oscilloscope, and now maybe it's time! Excellent.

@1pcfred

Жыл бұрын

If you can try to get a more capable instrument than this. You'll appreciate it if you do. You want something with a better sample rate. That'll give you a more accurate waveform.

@jetblakink

Жыл бұрын

@@1pcfred Do you have any links or examples?…

@1pcfred

Жыл бұрын

@@jetblakink it is not something I have any data on now. I can suggest that you learn how Digital Storage Oscilloscopes work though. How they display a waveform. They take samples and then connect the dots. How close their display represents the signal they're measuring is based on how many dots they collect. This scope is claiming 500 million samples a second. Which at 110 MHz isn't really so many dots. In reality at that frequency every wave this scope displays is going to be a sine wave. That's the most detail it can manage regardless of what the signal actually looks like. Square wave? Sine wave! Triangle wave? Sine wave! Mixed frequency? Dancing sine wave! It was funny as a SNL skit when Dan Aykroyd and John Belushi did it but it's not so funny when a scope does it. Cheeseburger, cheeseburger, cheeseburger. You want a cheeseburger! Look that up here.

@Learn Electronics Repair - check out the DSO-500K. It's a 2 channel scope with signal generator based on the Raspberry Pi W which let's you use your android phone as a screen. It costs less than $50, shipping included. It's just the board, so you'll want to grab some probes, and a box and such if you'd like those.

A few sidenotes about portable oscilloscopes that are not mentioned. When using these (low-end) handheld scopes on earth referenced measurings, like measuring mains voltage, or on SMPS, you can use these, but it's recommended to use a fixed x10 probe with isolated BNC connector, AND, use them only powered by the battery inside. That 5V usb charger/powersupply is only good for 1 thing, charging a battery and nothings else. These cheap 5V SMPS powersupplies are not suited to power a sensitive device like a scope, because they add lots of noise and ripple to your scope, AND, they leak mains voltage to your scope when connected to your scope. This leakage can go up to 50% or more of the mains voltage, but with low current (µA range) due the blue Y safety capacitor that is connected between the primary and secundary coil of the pulse transformer. Because scope measurings rely mostly on single ended probes, the measured signal on the probe pin is compared to the metal part of the BNC connector and this is ground at 0V. But when you connect such a handheld scope to those cheap 5V SMPS powersupplies, and mains voltages leaks to this metal part of the BNC connector, your ground shows still 0V, but when you use a DMM, then you will measure a voltage between the metal part of the BNC and ground/earth of your mains wall outlet. So your scope ground is not 0V, and your measuring is wrong. This is the same as using a bench scope, and cut the earthwire/pin of the mains power plug. Due the safety caps inside the scope, mains voltage will leak to the metal side of the BNC connector. This is low current, but enough to fry delicate electronic components. So my advise is, if you want to use a handheld scope, and want to power it from the mains, use a old linear 5V powersupply, or build one with a LM7805 or so. In the end, you will have a much cleaner and safer result.

@johndododoe1411

Жыл бұрын

Or just run it from the battery. That's the most ripple free power source possible. Beware that "external USB battery packs" contain cheap SMPS circuits to convert a 3.2 to 4.7V battery voltage to a 5V voltage good enough for powering the internal battery chargers in phones.

Thanks

Looks like decent value for money

If they would make a 2 channel version of this, even for a €100 or a bit more, it would be absolutely great

@someone2506

Жыл бұрын

There is a 2ch model ("unbranded") DSO2512G I have both the one in the video (for~2 years) and the 2ch (for~8 months), both model's software is near identical but the 2ch is by far more responsive, also has sig-gen and video output for a bigger screen (rca comp).

@maks886

Жыл бұрын

@@someone2506 thanks for the info brother, I'll check it out!

@LearnElectronicsRepair

Жыл бұрын

FNIRSI have said they will send me their new release products to review in future. Hopefully I can also take a look at their bench oscilloscope, but they have very low stock at the moment so could not spare one for review - I will pass your comment on to them 🙂

@TABE-O

Жыл бұрын

Buy two

I just got this handheld scope a few days ago (traded it for a tray of beer) and although this is of course no comparison at all to my Siglent bench scope, it can stil be very useful for troubleshooting and for those times you quickly need a floating scope. Very handy when you need to know whether a signal is there or not and if it's in the ballpark. I wouldn't use it to rely on its measurement values too much though. Reasonably good up to 20-25MHz so the official specs are (as always with these toys) tremendously exagerated.

I watched to the end looking for the test against a bench scope for the same signals and wondered if your homemade digital signal generator really had that crazy waveform or it was the mini scope getting it wrong. Because the shape of a waveform is another important go/nogo test sometimes specified in device repair manuals from before digital scopes became common. Some signals need to be pure sine, some pure trapezoid, some are allowed to go crazy between specific time periods, but need to hold steady around the clock edge.

Minute 24 it seemed with every "Auto" it zoomed in on f a "step", like there were stages you could try with it. This thing is a real bang for the buck.

Using this on SMPS accidentally with probe on 1x seems a quick way to blow-off cash. Yes, one could just tape the probe at 10x but still, 400v is not enough headroom for most SMPS (especially if is there's a faulty RC snubber). If I owned one, I'd use a safety rule: If above 150v, use an extra level of attenuation -> A BNC 10:1 (shrinked or taped over for more safety). My vintage Kikusui Com7201A can do 400v at the inputs, so for this mini scope I'd leave the 10x attenuator connected 100% of the time.

@LearnElectronicsRepair

Жыл бұрын

Actually I will be honest with you, the first time I tried it on the SMPS I actually had it on x1 probe. It worked OK but I knew full well that some sharp eyed viewer would point this out, so I re-recorded that bit on x10. It didn't cause the Scope any harm, maybe I was just a bit lucky.

@CliveChamberlain946

Жыл бұрын

​@@LearnElectronicsRepair Yup, I'll agree luck seems to have saved that input Transient Surge Suppressor for that short period. I'd still use a cheap 10x attenuator for SMPS work, it's safer and who cares if the ADC only resolves down to 2 volts at 100x, the waveform shape is what matters.

@andymouse

Жыл бұрын

@Mr Guru Wish I had a ' Defender' machine !

@dimitrismaster

Жыл бұрын

@@LearnElectronicsRepair my guess is they implement some type of protection,since cheap scopes are made for beginners and hobbyists who for sure will make mistakes with the 1x 10x.

@1pcfred

Жыл бұрын

@@andymouse What you want is a Robotron 2084 machine. It's the sequel to Stargate Defender. I don't think it can be emulated very well either because it uses 2 joysticks. Plus it is the greatest 8 bit arcade game ever made. Robe out!

The FNIRSI Tablet/Table dual channel scope is great for “our” kind of work is good & inexpensive as well.

My wife says the size and durability of the buttons and/or knobs are the most important considerations

How does this compare to the Mustool MDS120? I noticed that the Mustool has a vertical resolution of only 50mv/div which is a bit lame, but this one states 20mv

When the test @ 100Mhz your gen shows a Wfm with 1 step if this was on would it generate a bit of modulation shift. If it was active.

It is ok for sure. BTW one could think if pay 70euros for this simple scope or search for a second-hand better unit....for the same price or around it.

Heya, for that price it's great yes and toy can even take it with you nice

At about 2X costing, I'd check out the OWON HDS2102S as a 2-CH scope with DMM and wave generator functions too.

Just looked at this today. Is there not a way to get truer sine waves from the timer on your oscillator? Maybe a simple R-C circuit?

To take those readings on the motherboard, where are you placing the ground? Can you take measurements in differential mode?

I have ZEEWEII DSO1511G , from Aliexpress, its 65e. I can see that your model has the same software/screen like mine, but different buttons/hardware. We can say that electronics are getting available to everyone. Not everyone could have oscilloscope 10 years ago.

@LearnElectronicsRepair

Жыл бұрын

Yeah it could be very similar. This one performed well enough to specifications, I couldn't comment regards other models. I totally agree, electronics hobby is becoming more accessible as prices com down.

Very nice product for sure... But why does the manufacturer does not ship to Austria?

Hi Richard, Great job showing the capabilities of the scope. Does this model have cursers for measuring voltage levels or time? I frequently travel to medical facilities around the US to work on medical equipment and it would be easier to bring this scope rather then my tablet based unit.

@LearnElectronicsRepair

Жыл бұрын

It has a measurement option, which displays data on the left side of the screen. You can select the measurements that are displayed on this list, but I didn't notice you could use the cursor to take measurements

@mikedneal

Жыл бұрын

Thanks for the feedback. The cursor function is important to me because I need to make measurements of partial waveforms. This does look like a good option for basic measurements however.

hi i have the owon vds 1022i is rated to 40v 1x and 400v 10x it have usb isolation my question is what happen if i connect the probe to main voltage but with the battery of the laptop only ??? without the charger

I wonder if this one has the same FPGA input cct as some of the similar other handheld scopes. Some have a problem at around 80 MHz where the signal drops out and returns at perhaps 85 or 90 MHz? There are similar priced scopes with dual channels if you look for them.

@Tech-Relief

Жыл бұрын

@Mr Guru Rise times on square waves comes to mind...

For real electronics work a 2 channel scope seems to be the minimum, because very often the trigger event happens on a different point from the point you actually want to measure. But i guess it's ok for checking clocks and signal levels.

@LearnElectronicsRepair

Жыл бұрын

I'm not quite sure what you mean by 'real electronics work', but to be quite honest, the times i need to use both channels for repair work are very few and far between. In fact I never had to do that yet in all the videos I published and that is the best part of two years now. I've had to do this more often with my Salaea logic analyser to decode serial data, but that was more for prototyping than for repair.

@kriswillems5661

Жыл бұрын

@@LearnElectronicsRepair yeah you're right, I was more talking about design. I couldn't do without a multiple channel scope or logic state analyzer.

Great nails! Hd to switch it off.

Who, back in the day, used to ''float'' their scope by disconnecting the Earth in the plug? As engineers, we know how safe is safe and when you know the rules you know how you can break them to your advantage. My bench was supplied with an isolated 240 volt supply, though.

@khx73

Жыл бұрын

Still do. Need to be aware of what you're doing and what you can and cannot touch.

@andymouse

Жыл бұрын

Yeah was common practice when I was at work in the 80's ! health and safety 'officer' would have you sacked in a heartbeat now !

@LearnElectronicsRepair

Жыл бұрын

@@andymouse I was taught to do that when I did my City & Guilds in TV, Radio and Electronics Repair - and I did that on a 12 month full time course at a 'Skill Centre' paid for and run by the UK government. I have an isolation transformer on my bench to power the DUT so I can actually use my grrounded bench scope on hot ground with impunity but I refrain from doing so on my videos to save any unfortunate confusion!

@andymouse

Жыл бұрын

@@LearnElectronicsRepair Very Wise !

@kingsman428

Жыл бұрын

@@LearnElectronicsRepair Oh small world. I did that same course, The City and Guilds industrial electronics 224 at Portsmouth Skill Centre in 1985 with the practical fault finding exam The RTEEB. We were always competing with the boys in the next class who were doing the TV version. 😁 Shit, that's nearly 40 years ago. 😁😁😁

I've had a hard time trying to find anything to test the one I recently bought to 500Mhz. Every signal generator that I found cost an arm and a leg just like the scope. To be honest its really more scope than i will ever need. That being said it's worth it to not have to hit the auto button.

@johndododoe1411

Жыл бұрын

@MrTGuru I somehow doubt that. One common thing above 109MHz is actual radio signals, amplified or not. So the VHF bands for TV channels like (european) channel 9, and the lower UHF TV bands will fall between 109 and 500 MHz along with digital TV signals. Then there's the clock and data signals running between CPUs and memory chips, which also fall in that range. Narrow high speed signals like USB 2 High speed or SATA data links may be above 500MHz in order to encode data at above 1 Gbps. And that's just TV and PC stuff.

Thanks for the video. Although 70 Euro (or pounds) is definitely not $70, it's still a very reasonably priced meter.

@franzliszt3195

Жыл бұрын

Only $60 USD, probably because the CCP needs USD right now to buy gold and oil.

@LearnElectronicsRepair

Жыл бұрын

OK €70 is $73 and £60 at the time of publishing 😉

@franzliszt3195

Жыл бұрын

@@LearnElectronicsRepair Its $60 USD in the USA right now; perhaps you can't see the US price as your in the UK.

@LearnElectronicsRepair

Жыл бұрын

@@franzliszt3195 I'm not in the UK I'm in the Canary Islands. Actually the price I see on the link in the video description is €57.93 with free postage

@franzliszt3195

Жыл бұрын

@@LearnElectronicsRepair Interesting, Canary Islands. I watch a lot of electronics vids, and yours are among the best. That is a really cool scope. They got a two channel for $124 USD. Amazing technology.

Do you like this one as much or better than the last hand held o-scope you reviewed? I may have missed it if you said so in video.

@LearnElectronicsRepair

Жыл бұрын

Actually I rather like the little Miniware DS213 and have used it on several videos since reviewing it, but I will admit a lot of that is down to the fact the screen is so bright and clear and comes out so well on my video recording system. I think this is a bit of a 'horses for courses thing'. I'll probably continue to use the DS213 as a quick grab and record sort of thing for my videos but I would definitely use the 1C15 for checking things like crystal oscillators and when I want to connect the scop to hot ground. Mostly my favourite scope is my 100MHz Textronix 458B yet I will admit both of these handheld scopes are proving easier to use for me, but as I mentioned earlier a lot of that has to do with the fact I am recording repair videos. It wasn't actually your question, but generally speaking both of these hand held scopes are nice to use, each has it's own advantages and limitations but I wouldn't be unhappy using either of them. If it comes down to budget, the 1C15 is really good value for money I think and I don't know of anything better at the price. The DS213 is a really nice thing to have but I felt it was a bit pricey for what it is - yet I love it anyway. I said as much in each video.

@lmt200ish

Жыл бұрын

@@LearnElectronicsRepair I appreciate for the answer. I looked at all 3 you mentioned and will probably try the 1c15 to learn a little about using scopes. Once I get used to it I will buy a better one then. Thanks.

got a 60mhz tektronix analog 2215 oscilliscope for under 100usd, works well, probably needs some re calibration tho, off by about .2 or .3 volts, plus dat oscilliscope music work better on dat analog xy plotter mode, i can even hook my dmg gameboy to it for a screen, lulz playing gameboy on effectively a high persistence phosphor radar display tube...you even still have dat green monochrome tint!

@Clancydaenlightened

Жыл бұрын

and dats actually a full blown scope too, just a bit older, but if you work on lower power and embedded system, and ya retro game consoles, or shit like tesla coils, best bang for dat dollah imho, just dont have dat snapshot feature and buffer like dem digital ones, analog display is realtime...you could probably connect an external buffer to replicate dat ability

have you reviewed a budget spectrum analyzer?

@LearnElectronicsRepair

Жыл бұрын

Not yet. That would be interesting

@jafinch78

Жыл бұрын

@@LearnElectronicsRepair Surprised you haven't checked out the TinySA or NanoVNA. Then again, depends on what you're doing as many noted when I was looking into, they didn't have much a use for. RF Engineering & Amateur Radio (Fox Hunting) is what drew me in, having a background in spectroscopy and chemometrics with software development experience on the job. I immediately saw electronics lab test grade instruments as what I thought would be best to make my gear... then that changed to minimalist like with RTL-SDR's and other SDR's like the SDRplay's, etc. I wanted to make antennas as well that were wider band and if needed specific frequency ranges. Plus I had some custom ideas for telescopic mechanically tuneable antenna designs.

Hello, this device is battery-powered. Is it a standard form factor easy to replace?

@LearnElectronicsRepair

Жыл бұрын

Yes to both

Soldout on Amazon when i looked just now. Dang. Walmart still has them which I find odd lol

@1pcfred

Жыл бұрын

I got mine right off Aliexpress. But that was before the CCP released a bioweapon on us. I wouldn't shop there now.

To me it's just an indicator. How can we be sure of the measurement when everything jumps around and narrows or widens. How can we judge whether there is or is not jitter? This can lead to wrong conclusions. For simple measurements I use an old velleman hps140. I know its limitations and it is reliable.

Bandwidth has to be measured from the 3db point not if you can still see a squiggly line. From this video the unit appears to have a bandwidth of about 25MHZ. Roughly a 1/4 of the claim which sounds about right for the bottom end of the market. It would be much more useful if you could encourage people to get a minimum of something like a RIGOL DS1054Z. At £439 you will have an instrument with readings you can trust (ish) and actually learn something. Below that is just a waste of time.

This is an interesting oszilloscope given the price. But I would hesitate to recommend it to beginners as its weak point seems to be triggering and displaying stable wave forms. So you need some experience to get a good picture. However, I very much like the user interface. Most often used functions have their own button no need to scroll through endless menus.

@UltraUltaderdritte

Жыл бұрын

@Mr Guru Yes, the ADC is only 2x 100Ms/s. So bandwith is rather 30 MHz. Anything above must be multisampling or algorithmic creativity. This should be sufficient for most applications and you still get the additional feature to get at least an impression of what is happening at higher frequencies. But its not a true 100MHz device.

@LearnElectronicsRepair

Жыл бұрын

@@UltraUltaderdritte I tested it at 100MHz and it gave a sine wave display plus the frequency readout said 100MHz. How can that be 100MHz bandwidth then? It did that up 109MHz, above that the display became unstable and the frequency readout said --- You've seen it doing that on my video (I hope). So you will have to convince me that it isn't working above 30MHz 😉

@UltraUltaderdritte

Жыл бұрын

@@LearnElectronicsRepair Only because you can see a signal at a certain frequency does not mean the oscilloscope has such a bandwidth. The bandwidth spec is based on a -3db signal amplitude measured compared to the true input amplitude. So an oscilloscope can show much higher frequency signals than its bandwidth but the amplitude will be much lower. I have a Rigol 100 MHz digital oscilloscope and it still shows a sinewave up to 420 MHz and the producer does not claim this to be its bandwidth. Moreover, an digital oscilloscope is not only limited by its analog bandwidth but also by its sampling rate. Usually the sampling rate should be at least 5 times higher than the bandwidth in order to have sufficient points to represent the signal. FNIRSI advertise a sampling rate of 500 MS/s which would be okay for 100 MHz. However, teardowns show they use an MXT2088 as ADC which has two channels with 100MS/s. With interleaving they can combine both channels to 200MS/s which is only good for 40MHz. This is likely the reason why higher frequency are unstable displayed. I understand that for repair work a visible signal is in many cases fully sufficient but an oscilloscope is also a measurement instrument and is specified in this way.

@1pcfred

Жыл бұрын

@@LearnElectronicsRepair at 100 MHz all waveforms are a sine wave. Least that's what this scope is going to guess. Feed it a 100 MHz square wave. It'll be a sine wave too.

WELL YOU ARE BEING PAID AS YOU NOW HAVE A FREE SCOPE

Хубав осцилоскоп, но си е любителски.. Аз имам dso1511e+ 120MHz ,за същата цена... Но все още ползвам аналоговите осцилоскопи, защото изглеждат професионално...

If it is all you can afford then it is better than nothing. An alternative is to save up a bit and look for a second hand Fluke 123 They occasionally turn up on Ebay You wont get one for 70 Euros but they are infinitely better and safer being CAT rated and very robust especially for site work. You will look a lot more professional turning up to a job with a Fluke - even if you can't remember how to use it fully ! It is easier for someone experienced to automatically not touch something live (when you have had enough shocks you don't forget) but for the less experienced you may learn the hard way. 50 Volts is potentially lethal to some people and the manufacturers ought to step up and shroud that BNC

@thomasmaughan4798

Жыл бұрын

"a second hand Fluke 123" That's a great measuring tool, scope, frequency meter and DVM all in one unit. Ideal for testing generators which is sort of what it is for. You don't have to worry about inadvertently short circuiting the generator to ground since it doesn't have a ground.

@we-are-electric1445

Жыл бұрын

@@thomasmaughan4798 I just think if you are serious about getting into electronics and you need something portable the 123 is worth saving up for if you are going to be measuring 50 V and above. The downside is the 20 MHs bandwidth on the Fluke . The FNIRSI is great for checking a voltage is there and getting an indication of what it looks like . This video kzread.info/dash/bejne/h6Wmx85ulrTWe5c.html is worth watching with a similar device being tested - and it even has a video output using PAL - great if you are in the UK but not so good if you are in the US or Canada.. The video shows fault finding on some old computers - though it will be a bit limited on modern PC's but probably better than the Fluke. . If you really need the higher frequency response then the FNIRSI is a done deal otherwise if you want quality, a bit less performance and you want to stay alive the Fluke is best. That unshrouded BNC connector is so shitty. The Chinese produce some great value kit but they just don't care about safety. .

@thomasmaughan4798

Жыл бұрын

@@we-are-electric1445 I have the Fluke 123 Scopemeter. I bought it (well, employer bought it for me) for debugging T1 and E1 circuits. These signals lose waveform dramatically in only a few hundred meters. More recently I bought a Keysight DSOX1202g after considerable wrestling with whether I wanted such a thing. It's expensive! It's "Bode plot" function is pretty handy. Anyway, the little Fluke 123 is handy for testing live circuits where NOT having a ground is essential (and the case is rubber so it doesn't become "hot" depending on what you clipped the ground lead to).

Seriously, what's going on at Google these days? I commented earlier, and just now I get NTE Inc. sending targeted email on "NTE Circuit Protection Devices" I mean I'm not the sharpest knife in the drawer, but they could have waited a day so it wouldn't be so obvious..🤨

he tenido ese osciloscopio y es una frustracion, por 125usd me compre un owon sds 50mhz muchisimo mejor, mas estable, y no me da problemas a la hora de medir clocks y cristales etc.

@LearnElectronicsRepair

Жыл бұрын

Claro, puedes gastar más dinero y mejorar. Muestro el osciloscopio midiendo un cristal de 25MHz en el video y funciono bien

Biggest fault is that it is only single channel

@LearnElectronicsRepair

Жыл бұрын

To be honest, and I did mention this earlier, this is primarily a repair channel and in all my 340+ videos I only ever used a dual channel scope once, and that wasn't to diagnose a fault, it was to prove how something (an op amp circuit) worked 😉 I've been fixing stuff since the mid 1970s and while a dual channel scope is a nice thing to have, and my other four scopes are dual channel. the number of times I actually needed that feature to diagnose a fault are fairly few and few between. The most common situation I needed the two channels is with a home brew Huntron Tracker scope add-on in X-Y mode

First

1Ch scope is garbage, no matter what. No second channel, you can't compare phase/sequence of signals, like for what you would use a scope in most cases. 2Ch with differential, high voltage/1kV capable inputs, then it would be interesting for real service work, since bandwidth isn't that relevant in these cases, like repairing/diagnosing inverters, VFD drives.

@LearnElectronicsRepair

Жыл бұрын

That is really strange because on all the occasions I used a scope (and all my other ones are dual trace) only on one video did I need to use two traces. In all the other cases the oscilloscope helped me to find the fault using one channel only. 🙂

@1pcfred

Жыл бұрын

If you need all of that then you're going to pay a lot more for it.

The 110MHz part is what makes this scope a piece of rubbish. Rated BW should be its -3dB point, or should be determined using 3.5ns*100MHz (or 4.0ns*100MHz) Tr/BW product. In this case, the 110MHz is its Nyquist frequency where it starts to alias. This is misleading, and can lead to frustration. The price is great, but while in this price range there are few competitors, if you relax the price to some $200, you should have plenty of choices. If you are short of $130, chances are you are not going to play with anything that can generate 110MHz, so you are better off with an honest 70MHz scope. BTW, at $200, you get two channels, not one. For those interested in $200 scopes that are actually usable up to 100MHz, consider Owon, Dream Source Lab and Hantek. I use a Dream Source Lab Pushi scope (currently only publicly available in China, but you can always drop an email to them to buy one), which costed me 1299 CNY (

@LearnElectronicsRepair

Жыл бұрын

Of course you can get better for more money. I have better scopes myself. But for the price tag, and bear in mind for some buyers that is already high and maybe just affordable, its a good buy. Will you please not call this a piece of rubbish? It is what it is and as I demonstrated in the video if you connect it to a 100MHz source you get a reasonable approximation to a sine wave and the frequency display says 100MHz. It continues to do this up until 109MHz, after that the frequency readout says --- and the sine wave display goes very unstable. So yeah I agree it ain't a 110MHz scope but 109MHz is close enough for me. I then went on to demonstrate the use of the scope in several very different yet common repair scenarios and the 'piece of rubbish' did the job every time. As a repair tool it is very useful, I clearly proved that though some viewers have difficulty accepting the proof. This is primarily repair channel and if the scope proves a part of the circuit is working then you can move on to look for faults in other areas. It may not be the most accurate instrument in the world but as a go/no go indicator it works very well and for many people here that is exactly what they need. Nothing more nothing less.

@bskull3232

Жыл бұрын

@@LearnElectronicsRepair It is not about 109MHz or 110MHz. A 110MHz scope SHOULD be able to read 110MHz sine wave AT -3DB AMPLITUDE or better, reliably. In this case, the scope loses trigger at 110MHz. A proper scope should maintain triggered at way beyond its rated BW, for 110MHz, maybe in north of 150MHz. For this scope, the -3dB point should be way below 110MHz, making it really a 70MHz-ish scope (~72MHz, measured by KZreadr Bob Kalpon), marketed as 110MHz, this is pure scamming. I do agree that for repairing purposes, this probably works fine, in this context, rest of safety, this could be a viable option. But should you risk your life on a non-insulated scope probing mains is really your choice.

@pt17171

11 ай бұрын

​@bskull3232 Do you have a recommendation for a budget >£500 scope that can be isolated? What about the OWON handheld scopes, I was looking into them because they are battery powered and have a 100MHz bandwidth.

@bskull3232

11 ай бұрын

@@pt17171 The DSLogic scope I mentioned is a great contender if you have someone from China to buy for you. The Chinese keyword is 璞石. At this moment I only recommend this as this is so f*ing awesome so much so it's my daily driver despite many much higher end scopes I have.

110MHz scope, my backside! If specs are lying it belongs in the garbage. Rather buy a used real scope, 100MHz 2ch dso easily picked up for $50 or less.

@LearnElectronicsRepair

Жыл бұрын

@Big Cheese Did you watch actually all of the video? It kinda proved what you say as it seems to be a 109MHz scope I set my RF generator to 100MHz and this scope displayed a sign wave and the frequency readout on the scope said 100MHz. I then increased the frequency by 1MHz at a time and it continued to show a sine wave and display the correct frequency up until 109MHz, but at 110Mz the display went a bit crazy and the frequency display said --- So I guess you are technically correct but I also think you are splitting hairs a bit here I have several other scopes including a 100MHz Tektronix but I do think the FNIRSI 1C15 did a pretty good job for the money. As a lot of the advertising for this scope actually claims that it is a 100MHz scope I don't think it is fair to say the specs are lying, but anyway regardless when it comes to most repair work (unless you are into VHF radio repair) 25MHz is plenty sufficient.

@bigcheese781

Жыл бұрын

@@LearnElectronicsRepair : Yes, I watched it alright. Bandwidth limit shall happen because of attenuation, it's the analogue frontend that shouldn't keep up, it mustn't bugg out like that one (the wavesform is all over!). Another area, usually rubbish is single trigger misses horribly or even deadbands/bugs with sampling at certain frequencies (sweeping the input frequency usually reveals that nonsense). A common denomination these cheapos all have in common (in my experience) is if the spec is lying, the scope is buggy and junk.

@LearnElectronicsRepair

Жыл бұрын

@@bigcheese781 I think you are missing the point a little bit though. As this is primarily a repair channel, I look at test equipment from that perspective. I am not convinced the issues you raise matter so much to a repair technician. In most cases you want to know if something is working or not working, like is a local oscillator running at the expected frequency, do the Mosfets on each phase of a VRM have any gate drive, is a crystal oscillator running, is the audio signal getting to the next stage of an amplifier and that sort of thing. If I connect a scope and it shows me a reasonable approximation of a sine wave and says 100MHz on the screen when i attach it to a 100MHz oscillator, or I can see pulses/ringing on the drain of a Mosfet driving a switch mode transformer, even if it will not trigger on the signal exactly, then as far as I am concerned the scope told me that part of the circuit is working and I move on to elsewhere to find the fault. This cheap scope fills that requirement just as well as my 100MHz Tektronix 465B or Rigol. I don't particularly disagree with your points regards bandwidth and triggering etc but what I do take exception to is the assumption that the scope is therefore 'buggy junk' when in fact it is an extremely useful tool in many repair scenarios. It's like my various Multimeters, I have a Fluke but does that make the other cheaper ones junk? Absolutely not. I also have a Quick 861DW hot air station that I bought to upgrade from the cheap 858D hot air station that I used on many successful repair jobs for the previous five years (and still have). So the 861DW is better and has more capabilities, which is why I bought it, but does that mean the 858D is junk? No it doesn't, it allowed me to do a lot of work I couldn't have done without it. It's not like I don't have other scopes (I have five now) and I don't feel I need to defend this one because 'it's the only thing i can afford', it's just that it *is* useful, you will see me using the 'piece of junk' on some future repair videos because it is convenient to grab, and it may surprise you when you see me find a fault with it and fix it and I wonder after how many completed repairs you may think... 'hmm maybe the piece of junk it is quite useful actually. 🙂

This brand cheat the customer. I bought 100mhz oscilliscope when I saw this brand which I bought was 30 mhz not 100mhz.you can see in the youtube.

@LearnElectronicsRepair

Жыл бұрын

I tested this one by connecting it to my RF signal generator - at 100MHz it showed a sine wave and the display said 100MHz. I continued to do this increasing my signal generator to 109MHz and still the scope showed a sine wave and the correct frequency. At 110MHz it didn't like it, What more do you want form a cheap scope?

@jerzy6068

Жыл бұрын

@@LearnElectronicsRepair Do you know what bandwidth mean?

That is not 110mhz oscilliscope.

@LearnElectronicsRepair

Жыл бұрын

You are correct, but it was very close. Did you see me connect it to my RF signal generator in the video? I measured signals up to 109MHz and in each case it showed a sine wave and the frequency display was correct. At 110MHz it showed a sine wave (not stable) but the frequency said --- Pretty close though yeah?

@-dazz-

Жыл бұрын

@@LearnElectronicsRepair The bandwidth is measured at -3dB attenuation. That scope's bandwidth is no more than 25MHz, since at that point the amplitude is down to about a 71% of the original signal.

Meh, reviewing free stuff..... I thought responsible reviewers had stopped doing that.

Thank you very much - A great review, Great for the money. It will make a very useful self-Christmas present. Other than working pretty well , it will probably help me to see if/when I actually need a better unit for my intended applications,. Over to Dave Jones at EEVblog- especially "How not to blow up your oscilloscope" hehe

very cool nice finddd!!