FNIRSI1014D Oscilloscope 2 in 1 Digital Oscilloscope DDS Signal Generator, 100X High Voltage Probe, 2 Channels 100Mhz Bandwidth 1GSa/s Sampling Rate Built-in 1GB Storage Space

Shipping was prompt and the package arrived as scheduled. The packaging was impeccable. This little oscilloscope could have survived about any incident I can imagine it having to possibly go through during shipping.I was very pleased with how compact and lightweight it is. It's been about thirty years since I've used an o'scope and from memory they used to be horrendously bulky and heavy beasts. For my purposes, in my little amplifier and guitar repair operation, this gem is exactly the right dimensions and weight.My initial read through of the manual was only a little bit confusing but after sitting down and going through the operation section step by step to familiarize myself with it's buttons and knobs and their functions I found it quite easy to operate and with numerous features (such as an included 100X probe for high voltage work) that are admirable. Calibrating the 1X/10X probes was a breeze with the little calibration tool (flat top screwdriver) supplied. And it sits atop the shelf above my workbench in perfect viewing position right next to my multimeter and soldering station making it highly accessable which is a huge plus for me.So far the only negative attribute is that the output potential of the signal generator isn't adjustable from it's rated 2V pp. For use in guitar amplifiers I need a much lesser input in mV. So I will probably have to add a stand alone signal generator to my list of equipment. But I was aware of this feature when I bought it so I won't detract from my rating for it. For other purposes not requiring a smaller input potential this built in signal generator will work well.I haven't had the opportunity to try it out in actual signal tracing yet as I'm waiting for load ballast resistors to arrive but I have no compulsions to think it will do anything but serve me well at this point.So up to this point I am quite pleased with this item all around excepting where noted above. The price is definitely a value for everything this little unit can do.

The good:(1) Wow, this little oscilloscope offers quite a lot of bang for the buck. Back in the day, a scope that would do half this much weighed as much as a large, fully stuffed suitcase. I ran this little thing through its paces in my laptop, sitting on the sofa. Incredible!(2) The scope seems pretty accurate.(3) Love the built-in signal generator. I wish it had amplitude control, but it's wonderful nevertheless.(4) The controls are easy to use - intuitive, once you get the hang of the scope.(5) Other reviewers complained about noise from the cheapo power supply. I could detect no such noise, even at full gain (50 mV/div). They must have responded to reviewers' concerns and started using a smoother power supply.(6) The "Auto" button is amazing - a real time-saver. Just press it, and the scope will quickly give you a viewable amplitude and sweep rate to view the waveform. Then tweak the settings from there to your needs. This is not to be confused with auto triggering, which is another function.The bad:(1) The instructions are microscopic. The text is readable with effort. The numbers on the diagram are not, at least by the human species. Fortunately the manual can be viewed and printed in readable format from the fixlib website. (Print to PDF for an electronic copy.) The text is poorly (but not horribly) translated Chinese. Strangely, the specifications for the scope aren't printed in the manual.(2) The FFT display is useless, as there is no way to read off the frequency or amplitude values. The horizontal cursor displays not only time (for the primary display), but also frequency (for the FFT). However, the frequency values are complete nonsense, undoubtedly because of a firmware error. And the vertical cursor does not display the FFT amplitude. The FFT is therefore only useful for determining if there is distortion in a sinusoidal signal, but there is no way to get any sort of value of % THD. This is in contrast to a Hantek oscilloscope module (with interfacing through a computer via USB) that I bought maybe 10 or 12 years ago, which did an incredibly competent job of displaying FFT information. The FFT display seems to have been an afterthought, perhaps to display the internal function used to measure the frequency of the waveform (which is nicely displayed).(3) Watch your input voltage! The label next to the BNC connectors says 400V max. However, that seems to be only when using a 10x probe. If you read the instructions, the true input maximum is 40V at 1x, 400V at 10x, and apparently 4kV at 100X, EXCEPT that the supplied 100X probe indicates 2 kV max. Truthfully I don't know whether voltages above 40V and below 400V (input directly at 1x, straight into the BNC) would blow anything up.(4) I've seen testing on this scope that demonstrates it has difficulty displaying and measuring a 100 MHz signal. If you need to measure frequencies this high (I don't), then you should do your homework to determine whether the manufacturer has resolved this issue.(5) The price dropped literally the day after I bought it. It seems pricing of this unit is very Keynesian: When demand goes up, price goes up too. That can leave you feeling a bit cheated.(6) If you are used excellent scopes such as Tektronix makes, this one will seem pretty flimsy. If you plan to use it daily, you might consider a more expensive scope. If you only need it for occasional use, it should be fine.All in all, it seems to be a very nice little basic scope - adequate for my needs of occasional circuit prototyping. Great value, to be sure.

Having never used an oscilloscope before in my life, I had to go to youtube to find videos of how to use it, but I am sure anyone who has used these before would be able to plug in and power up and start using with no issues.The things I like the most are all the different function signals it can generate. This is perfect for all sorts of projects and troubling shooting, and for the price point, you cannot go wrong. It has two low-voltage probes, a high-voltage probe, and an alligator clip connection with red/black clips. It has everything you need to start immediately and makes it easy to tune the probes with a little tool that allows you to use it like a screwdriver.This is for anyone looking for a hobbyist-level scope and is a great first scope for beginners. However, it is built with enough quality and features that even a seasoned pro looking for an inexpensive tool to add to their workbench would enjoy this purchase.

For very little money, I have myself a great little tool. It functions very well and I simply love the "view" or rather the lcd screen. I used to have a large oscilliscope with a cathode ray tube. Worlds of difference. As other reviews say, yes, it's not a precision laboratory instrument, but it is accurate enough for hobbyists and casual users. It is large enough to accomodate a easy to see screen and also a compliment of knobs and switches instead of those "multi-function buttons" found on other units.

The specs on this thing are nowhere near advertised. It’s glitchy and has artifacts. I returned mine and ordered the hantek for about the same money.