DSO-TC3 Oscilloscope 3-in-1 Handheld Oscilloscope DDS Signal Generator Transistor Tester Portable Oscilloscope 500Khz Bandwidth 10MSa/s Sampling Rate, 6 Types of Waveforms, Transistors Measure

I bought this to adjust my subwoofer amp gains. Worked great. No distortion.

Good tool using for car audio, cheap is fine i only needed it for a few short uses and it did the job.

Great meter for the money.

I had great hopes for this device based on the previous reviews. I charged the unit before testing it. The three connectors will not fit any of your other test cables, but a BNC adapter and clip leads were supplied. I connected the oscilloscope to the signal generator and set it to a 1kHz sinewave. The oscilloscope showed a square wave. The changed the generator frequency to 20kHz. The scope image didn't change. Triangle wave also showed as a square wave. I then tested a NPN transistor and got reasonable results (not verified). I then tested a N-Channel MOSFET transistor and got reasonable results. I turned the unit off. Upon showing the MOSFET test to a friend, the device indicated the MOSFET was now a Zener diode. Nothing would change that. With no device connected it still indicated as Zener diode. I never connected it to any outside device, but the poor instructions hinted that you could break it by apply a negative input. It got returned the very next day without difficulty.

everything was there and works as it should

Bought it 4 times

The media could not be loaded. I will try to explain where you might be tripped up using this and things you can't tell from the specs. I'm not going to repeat the specs here... you can read that for yourself...This is defiantly a more mature product than the earlier models, the menus are very clear and easy to navigate and it has more functionality and higher frequncy coverage. generally new user / beginner friendly.the included manual is very comprehensive.the signal generator has many different waveforms and options that one would expect from a signal generator. this gets a big thumbs up from me. the output voltage is limited to around 3.3v max though.The oscilloscope works but, don't set your expectations too high. the 3db point is just over 500khz but... seems to be a linear dropoff in the measured signal as the frequency rises starting from dc. signal levels measured low across the whole range compared to my bench oscilloscope.there is some instability on the trigger on certain waveforms and voltage levels. The video shows it measuring a clean sind wave at 500khz at 10v p-p. no matter what I did, or how I set the trigger level or direction, I couldn't get a stable display. square waves were very stable. the instability happened no matter the frequency, not just at the upper end of the range.the component tester works as well if not better than any of those stand-alone types. diode and transistor checks were great, and the higher voltage testing for the zeners is an advantage over some of those stand-alone testers so this gets a thumbs up!I compared cap readings against a professional meter and it was pretty accurate depending on what frequency was used for testing, see images. accuracy in this area tends to be a weak point for many multi-function component testers but this one seems very goodThe volt meter worked as expected and seemed reasonably accurate.I am not a huge fan of the connector for the probe, i do wish they jsut had a standard BNC connector on the unit for it.. It uses an adapter to go to the standard BNC probe included to a push-in connector the size of a SMA connector. seems like there would be a lotta leverage on the connector if it got hit sideways.Conclusions: this is not a professional tool, but, for what it is, it is handy and easy to use, and lets you generate signals, read voltages, and see signals as well as test components. it has its limits. As long as you are aware of them, you are good to go. Definitely, a device that would be ok in the hands of the less experienced or hobbyist as long as you are not relying on the accuracy of the oscilloscope voltage readings.

I got this to tune a couple portable generators and to see how clean the power was. They gave me the voltage and hertz and the waveforms showed one to be more suitable for my electronic devices. I which it gave THD but at this price, I will eye ball it. I also tested a used 2500 watt invertor, surprise, 50 HZ.