HANMATEK 110mhz Bandwidth DOS1102 Digital Oscilloscope with 2 Channels and Screen 7 inch / 18 cm, TFT-LCD Display, Portable Professional Oscilloscope Kit with 500 MS/s *2 Sampling Rate

Per the advertised specs this thing is amazing for the price. I'm just a car mechanic so I maybe can't judge it as thoroughly as an electrical engineer, but for my use case it's awesome. The few other auto techs I've worked with that consistently use an oscilloscope for diagnostics use very expensive tablet style scan tools and very expensive obd2 dongles and instead of this little stand alone bad boy that costs less than the dongle you need to do O-scope stuff with an autel or snap on scan tool. As far as function, the wall wart to laptop-style barrel connector power supply is less than ideal, but it has never failed for me. I love the knob controls for the time window and voltage range settings vs tablet based touchscreen inputs. I pretty much only use it to monitor 5V /12V hall effect speed sensor waveform inputs for engine, transmission, and abs sensor signals and maybe a coil or injector control circuit for the one time in a hundred it's not obviously just a bad coil, injector, or circuit. Not really a must have tool for some car mechanics but for an decent diagnostic tech it's almost a necessity these days and this is a very good way to get a stand alone O-scope in your tool box in a package that also happens to be a very cheap, good looking, and effective.

Great as an entry level scope. Even with one channel, the bandwidth is more that enough for most home projects.

This appears to be an amazing instrument and has features we never dreamed possible when I was learning electronics in the 1960s. It would have been perfect for my hobby use. However a couple months ago, I got pulled out of retirement and my requirements became professional again. I bought this product but I discovered it uses an 8 bit A/D converter which means there are only 256 vertical data points on the screen. This is alright for a beginner or a hobbyist as the price is the most important thing. I recommend it for those applications. But for the R&D I am getting paid to do, I need 12bit or better A/D to get the necessary resolution. I had not even thought of this until I saw the display. I had to return it and bought another instrument for twice the price with no additional features other than a better A/D converter. Pity. It is really great otherwise. For learners where price is all important. All that work to engineer a great product and to blow it in economizing on one chip inside, relegating it to the hobby market. Likely done on purpose because otherwise there would be no incentive for pros to buy a more expensive instrument. But hobbyists and students, go for it as it will be a wonderful learning tool for not a lot on money. The cheapest full feature scope possible.

Use low-end Tektronix at work, bought this for home. Have to say that the Hanmatek DOS1102 has several aspects, mainly on ease of use, that are superior to Tektronix in the same speed class. 1. AC/DC coupling is a top-level menu item. (Tek requires six button clicks and a knob turn to make this simple change. What was Tek thinking?) 2. "Analog" adjustments like position knobs and trigger level have a better default resolution and speed, and thus do not require the tiresome coarse/fine menu that the Tek does. 3. Very convenient "show all measurements" quick screen for when you don't want to waste time setting up several different individual measure parameters. 4. Reasonably quick boot without any pushback or questions when powering on. 5. Seems better than Tek about not putting junk in front of the waveform you're trying to see, but maybe that's because item 3 above means you'll have less need to post measurements on the screen. Now the downsides: 1. Most sensitive scale is 20mV/div with X1 probe, about 2mV rms noise on this scale. 2. As some other commenters mentioned, there's about 1-2 pixels noise on the trace regardless of scale that gives it a crawly kind of look. 3. Single shot capture works great but is less convenient than other scopes; the first shot is easy but to do another you have to scroll back through all the trigger mode options to get back to Single. The Run/Stop resets the scope to Auto mode. Oddities, not necessarily downside: 1. XY mode splits the screen into a small XY display, a small YT display, and a text box. I'd have preferred full screen XY but seeing both at once also has some advantages. Subjective stuff: On the good side, handles more like a traditional scope compared to some others, controls respond quickly, and stuff that would be front panel on an analog scope tends to be on the top menu instead of hidden. On the downside, the knobs are soft both in texture and in the detents. I'd have liked harder plastic and a more robust detent. Overall: Impressive value for a $170 scope if you're not doing small signal work.

My old O'scope is a Hameg 20 MHz dual-trace I bought in (then West) Germany in 1982 for about $2,000. It's heavy, has a tiny CRT and dual-trace, but I've lugged this thing around for 42 years and now it's almost obsolete, but still works, and it can be plugged-in to a variety of power sources! The HANMATEK 110mhz DOS1102 only weighs a few pounds and exceeds my old scope in everything else. After it arrived an hour ago I looked through the handbook trying to acquaint myself with the parts and controls, but the hardest part was figuring out HOW TO TURN IT ON. The technical support guy I contacted gave me an URL and I watched a short promotional video that showed WHERE the power-plug went, which, if you don't know, is almost invisible on the left side. Not what I thought at all with 2 USB plugs (which are only for signals to a computer.) What's missing in the information on the Amazon page and the handbook is the most simple thing you just might want to know, like "How to turn it on!" Amazon needs to have that video, not the other one that shows you almost nothing... Once I found the small plug-in and pushed the on/off button, it popped on instantly with a beautiful color screen showing glorious fine detail. Oh, that's NICE! The Oscilloscope techniques will come around without much effort. I actually went to school at Lowry AFB in Denver to learn how to repair and calibrate these things and other delicate instruments. (At least instruments like a Hameg 20 MHz.) Now I'm not so sure because everything is on IC's and if something goes wrong it might just be cheaper to buy a new one (instead of trying to de-solder a chip from the board and replace it with the same model number chip, IF you can even find it...) The good thing about IC's is they use tiny voltages and currents and have greatly extended life compared to components like tubes, resistors, and capacitors. For now, I have a new, very compact and lightweight scope!