FNIRSI DSO152 Oscilloscope - 2.8" TFT Handheld Digital Oscilloscope Kit Portable Automotive Oscilloscope, 2.5MS/s High Sampling Rate, 200KHz Bandwidth, Trigger Function Auto/Nomal/Single

Good quality. Works as intended. Screen is clear and easy to read.

produto em bom estado e funcionando normalmente, útil e satisfatório, não fiquei decepcionado. Não é profissional, mas funciona.

A must for the lab or workshop. Interesting trigger (didn't trigger on low-duty-factor audio bursts) and somewhat-awkward controls but absolutely amazing performance and functionality for the very-low selling price. Incomparable resource for critical floating measurements. This customer spent a full day researching $4000 - $6000 battery-powered scopes and scope-meters, and was unable to confirm that any of them could make 2% accuracy peak and rms measurements of 1 volt audio bursts on a 250 volt audio signal (in other words, accurate high CMRR measurements while floating). Bought one of these units while unsuccessfully researching the high-end ($4000 - $6000) scope-meters. The DSO 152 arrived that evening and after a few hours of learning how to make the trigger comfortable with fast signal-bursts floating on 200x background, the DSO 152 began capturing a high-value signal that had remained elusive for weeks. Immediately bought several more, and plan to keep ten or so in the lab. At this price it just doesn't make sense not to have these on hand for unusual applications, floating measurements and portable measurements. NOTE: this is not an isolated scope, so the scope AND leads MUST be isolated from the user by (for example) a transparent barrier for measurements on circuits floating over 40 volts. To obtain 2% accuracy I placed four of these into a small transparent plastic container with the floating audio device, and calibrated each DSO 152 at the desired operating point. Better than 2% accuracy floating audio-frequency short-burst measurements in 200x common-mode, for under $100. Pretty sure none of the $4000 - $6000 scope-meters can accomplish the above. Amazing value.

This single-channel digital 'scope provides an economical and easily-portable tool to give a basic display of waveforms and their overall parameters. This 'scope is small enough to fit into (some) shirt pockets; it has a good physical layout (controls & display); the case seems to be robust and likely to protect the unit from rough handling; the display is easy to see under normal room lighting, but can be difficult to see under bright daylight conditions - like most such displays; the user interface is intuitive and easy to use; it comes with a conventional 1x/10X oscilloscope probe (with accessories) as well as a set of alligator clip leads that can be used in place of the probe; and the device is inexpensive. Beyond the inherent limitations of a single-channel 'scope, the only disadvantage I've noticed is the rather glaring omission of an important basic function of an oscilloscope: That is, the ability to re-position the trace on the screen - which is important for using the grid to precisely measure the height and/or width of "features" of the observed waveform (although this "deficiency" is partially compensated for by the on-screen numeric displays of most OVERALL waveform parameters - but there is no way to measure specific PARTIAL features of waveforms. The other problem resulting from the inability to adjust the position the waveform on the display is that the user cannot "zoom-in" on fine details riding on large-amplitude waveforms. This basic 'scope does not offer any of the "bells and whistles" available on some more sophisticated 'scopes, but the only "high end" feature that would be particularly helpful is measurement cursors - that would allow measurement of "features" or specific sections of the displayed waveform. Having cursors would help to compensate for the 'scope's lack of ability to adjust the position of the trace relative to the display grid. I do not have the ability to check the 'scope's fine accuracy, but its readings are consistent with other meters and 'scopes that I have available. I have not used this 'scope long enough to report on its long-term behavior, but it seems to work well so far.

Fine little device for hobbyists, I replaced the lead ASAP as they wear too short for car troubleshooting but overall great little device.