FNIRSI® DPOS350P 4-IN-1 350MHz 1GSPS Tablet-Oszilloskop Signalgenerator Spektrumanalysator Frequenzganganalysator

The DPOS350P oscilloscope is a very useful tool for home hobbyists, but it also has its shortcomings, which I hope will be addressed in a future firmware update.

What I particularly appreciated:

1. The system starts up quickly after power-on, which makes the device ready to use almost immediately.
2. The built-in spectrum analyzer, although quite limited, is still a pleasant surprise and useful for basic work.
3. The frequency response analyzer is also appreciated, even though the results can only be interpreted very roughly.
4. The ability to save FFT conversion lengths from 4K to 32K adds flexibility for different types of signal analysis.
5. The improved touchscreen is a nice upgrade, especially since I was already used to the FNIRSI 1013D.
6. The included carrying case is a very welcome accessory, making transport and storage much easier.

What disappointed me:

1. There is no indication of charging status, either when the device is turned off or on. When on, there's only a tiny icon resembling a phone battery with a blue center. When off, there's no way to tell if the battery is charging or fully charged. A device in this price range should offer basic battery status information – even the cheapest mobile phones do.
2. The firmware version is not shown anywhere in the system, and it’s not mentioned in the manual. There's no known way to check or upgrade the firmware, if that’s even possible. Even my old FNIRSI 1013D supports firmware updates.
3. The analyzers work very coarsely, which limits their usefulness for more precise tasks – for example, displaying AM sidebands is not possible.
4. The internal fan is too loud, which is distracting in a quiet work environment.

Conclusion: I’m still getting to know the device as time allows. For home use, it is sufficient, although I regret the four shortcomings mentioned above. Perhaps some of them will be addressed in a future firmware update – if one is even planned. Still, for the price I paid, I got a good instrument. I’d say the price matches the device’s overall usefulness.

I play with satosfation good for home brew and testings my works

Seems to be a great instrument. I would buy more items from them.
Fnirsi takes way too long to ship, almost 2 months. USPS dropped the ball multiple times as it took almost 30 days to get to me.

Works as expected

Recently I found out about FNIRSI electronics gear. Full-featured scopes and multi meters in a small footprint. So I ordered the DVM model as well as a more bench style DSO/Generator/Analyzer model for misc diagnostic work I do. So far they exceed my expectations for a DSO in it's price class. Include all the typical manual settings, coupling, offsets, display options, X-Y vectorscope, signal generator with typical waveforms and noise for whatever you're wanting it to do. One package usually multiple devices on the bench. Comes with easy to calibrate X1/X10 probes to match the number of channels you have. In these cases, each meter has 2 scope probes, signal gen BNC jumper, DVM V/A/ohm probes and temp probe.Back when had such things for business use, cost was considerably more for each item in a much larger form factor. Very pleased with battery life, ease of operation, accuracy in # of data points in samples, storage, etc. I'm sure I haven't used all of the features yet even after reading a well put together manual (global languages supported) For the DVM/scope model FNIRSI-2C23T, it's 10MHZ BW for each scope channel is adequate for basic display, had I known about the 2C53T with 50MHZ, I would have popped for he small amount extra to get that one. Either one is great for audio, while the higher can assist in many HF radio projects, including Amatuer Radio gear.

The FNIRSI-DPOS350P is even more amazing with oscilloscope, signal generator, frequency response analyzer and spectrum analyzer in one package. With 2 scope X1/X10 probes with 350MHZ BW, you can measure even more radio-related gear as well.

While the internal batteries charge last for a lot of use, when new and when needed, both have quality USB-C charging cables included for faster charging from today's higher current output quick chargers..

FNIRSI devices are firmware upgradeable if/when company comes out with improvements or feature enhancements. Both came shipped with latest revisions installed which is always nice to not have to immediately upgrade something you just bought before you know it works.

You can tell quality control is high how they build-by-order so all items get the latest software, hardware. The little extra wait is well worth it when they arrive at your door.

Have used various brands and models of test gear in my careers and so far, very pleased with my finding FNIRSI and their products.

They have tools available as well, so check them out on their website.

https://www.fnirsi.com