FNIRSI 1013D Plus Oscilloscope - Portable Handheld Tablet Oscilloscope with 100X High Voltage Probe, 2 Channels 100Mhz Bandwidth 1GSa/s Sampling Rate 7" TFT LCD Touch Screen

I needed a cheap, portable, “beater” scope to use away from the ‘bench, so I bought this with very low expectations. But I’m actually quite impressed! It isnt a LeCroy, but for 160-ish bucks, its a winner! The best part for me is it can be completely isolated from any ground. Totally self-powered and easily air-gapped to the tune of hundreds of thousands of volts. Of course, the input to the scope’s BNC wont handle more than 40 volts delta without an attenuator probe, so your input differential voltage cant be more than this, but you could hook this up between adjacent windings of a tesla coil and it wouldnt care as long as you had it in a Faraday cage. You CANT do that with a line powered scope, and you DONT want to do this with a $8000 name-brand portable!The user interface is really simple. Nothing but the basics here. Trigger, slope, sweep, volts/division, AC/DC coupling, probe attenuation (1x, 10x, 100x). Thats pretty much it. Nice that it comes with two ea 1x/10x switchable probes and one dedicated 100x probe for up to (allegedly) 4000 v. No, I dont plan on trying it, because it looks kinda manky in the insulation department, but it works a treat on 440 AC! 5/5 stars. Kinda gobsmacked here.

This is the first time I've used an oscilloscope. It was easy to set up and I like the automatic settings, but I also love how easy it is to change the parameters. It's also easy to stop/hold an image and analyze the waveform. I also like the dual-channel feature as it allowed me to see what happens when looking at different parts of a circuit. It's a great tool for a beginner like myself, but I suspect that even a pro would find this a useful tool.

This is a great light weight portable little scope. This is not a $3,000 tech. Scope. At this price it is a great hobby scope. Very nice dual display. Easy to see. The touch display is very simple. Basically put the probe on the test item and touch auto setup. It clicks several times and bingo everything is displayed. It tells you the frequency and P to P and RMS right on the screen. No calculations. I measured my house AC at 124 VAC but the scope said 130 VAC RMS. So this is not a calibration scope. Not sure if there is an adjustment for adjusting the scope to be a little more precise? However if you’re wanting a very small scope that fits in a drawer and lets you see many things this is the best one I have seen. I love it and I have already fixed a friend’s equipment using this little scope. Check your home power with it. Your scope may be better calibrated that the one I got. But it is not a problem for me. I use my multi meter for exact voltage measurements. You will enjoy this little scope.

The instruction manual is not clear about how to safely perform high voltage measurements. I bought this to "inexpensively" check the sine wave of my mains, power inverter and standby generator. This type of measurement is safe, as long as you don't touch any metal on the oscilloscope, and nothing with a path to ground touches metal on the oscilloscope. While measuring high voltages, keep it unplugged from the wall outlet and only run on battery power.UPDATE: The included charging cable cannot be used as a data cable to copy screenshots from the oscilloscope. In Windows I got the message, "USB device not recognized. The last USB device you connected to this computer malfunctioned, and Windows does not recognize it." You need a USB-C cable that supports both charging and data transfer.

The functions are fairly basic but the portability and large screen and easy setup are nice. I like that being battery powered it is isolated from the AC ground. I bought the one with 3 probes inc. the 100/1 to work on some old tube equipment I have. Some reviews I have seen say it is not good to 100 MHZ. I don't know, I mostly only need to about 30. I have another more expensive 100 MHZ scope if I need higher.

This is a very capable scope that has a lot of features. I have owned a lot of oscilloscopes over the years, but I like this one the best. It is lightweight and very portable. The touchscreen helps the ease of operation. There is a bit of a learning curve, but the end result is worth the time. The automatic setup button makes operating the scope a real snap.I store my oscilloscope in a HF case with some of my accessories. This protects it during storage and travel between locations.

I'm a auto tech and test lots of pulse width controlled circuits along with Can com signals and needed something portable / small. This is short due to not being worth messing around with it much more. First I grab a circuit, 2 second div and by the time I get to the scope the pattern is gone, no roll mode. Second the measurements only work on a time base 50ms or less. Third, testing communication circuits it comes up short with a distorted signal as if it's not a true 1 GSA sampling rate. I have 3 other scope and this didn't cut it. Also overall quality of the case is poor, don't even drop it once.

I bought two of these.The first one worked fine.The second one didn't even turn on. I returned it and got a replacement. The replacement one gets freezed every day or two, so I had to constantly power-cycle it.