Fnirsi DPOS350P Is this a good scope for beginners?  - Page 1
Forum section: electronics / beginners

author: shortster90
author_rank: Newbie
timestamp: April 09, 2025, 07:20:57 pm
content: Hello everyone,I am a beginner with Electronic diagnostics. I am almost 60 years old but when I was a kid, I loved building Heathkit products and tuning and repairing tube televisions. I would like to try to repair vintage amplifiers and receivers.I have purchased a FNIRSI DPOS350P as my first serious scope. (Serious to me) Will this be adequate for testing this type of equipment? I have about 2 weeks to cancel the order from Amazon if there's a much better recommendation.I know there's a love hate relationship with FNIRSI equipment. I have purchased their LCR tweezers and their DSO-TC3 oscilloscope, and have been pleased with the results.Thank you in advance for any insight and information regarding this purchase. I am looking forward to hearing from all of you.Sincerely,Michael Burke

author: Markus2801A
author_rank: Regular Contributor
timestamp: April 25, 2025, 03:01:28 pm
content: HelloUnfortunately there aren't any reviews out there for this new type of DSO.According to user reviews and also opinions here in this forum to other products fnirsi provides (I do own some of them) they seem to have a good price-performance ratio.They do work well and yes if you don't expect performance like a Tektronix, R&S, Keysight etc. which of course definitely cost more, than those devices should be more than sufficient for beginners.I`m also considering in getting the DPOS350P ;-)Kind regards,Markus from Austria

author: pcprogrammer
author_rank: Super Contributor
timestamp: April 25, 2025, 07:57:26 pm
content: Unless you need the 350MHz bandwidth or like and want a portable device, I would pass on it.Even though the Hantek DSO2000 series are not the best either, you get more functionality in some respect for probably less money.There are several threads that discuss the FNIRSI scopes:https://www.eevblog.com/forum/testgear/hello-everyone-i-am-going-to-make-a-very-low-priced-1ghz-oscilloscope/https://www.eevblog.com/forum/testgear/new-bench-scope-fnirsi-1014d-7-1gsas/msg5655459/#msg5655459https://www.eevblog.com/forum/testgear/hello-everyone-i-am-the-developer-of-dpos350p-and-dpox180h/msg5874066/#msg5874066https://www.eevblog.com/forum/testgear/new-toy()-scope-fnirsi-dpox180h-claimed-180mhz500msps-(may-2023)/msg4868756/#msg4868756https://www.eevblog.com/forum/testgear/new-oscilloscope-from-fnirsi-dpos350p/msg5838763/#msg5838763There are FNIRSI enthusiast and haters so to say. Having reverse engineered one of the first scopes they made, I found many problems that did not build confidence in the product. They did make changes, but I can't say if things have really improved. Looking at a provided photo of the DPOS350P PCB did not give me a lot of confidence in the device. Sure the board looks impressive, but I see issues that make me doubt.Based on what I read here on the forum Siglent seems to be a better choice in the lower price segment. Maybe look around a bit more before you decide on buying a scope.Ask more questions here on the forum about the different types of scopes in relation to your intended use. Are you thinking about working on tube based devices, because these work on high voltages and bring risk with them when not sure what you are doing in relation to using a scope. Maybe a old analog scope would serve you better in this case.Just think about it some more.