Yes, it's very good value for the money! With 1Gsample/sec, however, I think 400Mhz is possible/useful only in "known testing setups", with no noise etc. I consider myself happy with 250mhz !

question: how (bad) is the fan-noise of the oscilloscope? i was reading over at eevblog that the fan is blowing full-steam all the time?! or is that not true? how do you perceive it?

@@hercion There is a fan yes, but I never noticed any annoying noise. I have no issues with noise.

@@la7yka thank you. i read at eevblog that the newer models have an improved fan that is much less noisy.

The software goes up to 500 Mhz, because the machine is capable of 1GS/s (which sets the theoretical limit at 500Mhz). Realistically, it is perfectly capable up to 200Mhz.

@@therfnoob7697 Thanks for the fast reply, just to be clear, I'm asking about the FFT, so, if I understand, the FFT is correlated to the Scope Bandwidth, right?! So, in theory, the max FFT measure (with accuracy, up to -3db) would be at 200MHz, right?! (I'm thinking about measuring VHF Radio harmonics).

@@JohnUsp That's correct. In my answer I wanted to explain that, if you ask, the FFT software will also visualise up to 500Mhz, but without being reliable due to bandwith limits of the unit, as you correctly point out. VHF harmonics are probably out of range. The fundamental is at ~140Mhz so the first harmonics is at 280Mhz. You'll probably be able to get a "figure" of some sort, but not accurante in terms of dB reading.

@@therfnoob7697 yes, I want to measuse for 146.520 fundamental, the harmonics starts on 293.04MHz and 439.56MHz, maybe can have an idea, but with a weak amplitude or worst. Thanks again.

@@JohnUsp mmm, I think the oscilloscope is not the ideal instrument for this. Try to search in youtube for "TinySA Ultra". It is apparently a good and inexpensive Spectrum Analyzer for this type (amateur level) of needs.

maybe try to google