Hi all,
I'm getting ready to purchase my first oscilloscope for home lab use. I was originally going for one of Keysight's new 1000 series - probably shell out for the full bandwidth non-EDU model + signal generator (since I don't have a real one), and then hack it to 200MHz, and ideally unlock the serial protocols.
But then I stumbled on the Siglent SDS1202X+ with the decoder options included for almost $100 less. Granted, this doesn't include a signal generator, so its about the same cost and features as the Keysight DSOX1102A, but then I don't have to mess with the internals (lame, I know ).
Not lame at all. I'm not sure I'd want to go replacing components inside my oscilloscope and the hack isn't even working yet.
The Rigol is generally the best choice fpr $400 but the FFT is a bit useless. If FFT is a must-have then maybe it's not the answer.
A Keysight with everything is expensive.
The Siglent looks really nice and pricing is good, but... only two channels. That's limiting, especially for serial decoding.
In short: Any of the three is a compromise.
The only definite things you've mentioned you want to are "FFT" and
"SNR & THD measurements of a few pieces of audio equipment" so I'm going to suggest something else: The Analog Discovery. It's a really nice piece of equipment for doing that and will handily beat
all of those 'scopes at doing it, mostly because it has a 14-bit DAC (vs. 8 bits in the 'scopes). Yes, it needs a PC but on the other hand you get nice detailed Bode plots
If you're just beginning your career it might be wise to hold off on trying to buy a 'do-everything' oscilloscope for now. Both of your choices are just released this month so nobody knows how they'll work out in practice.
Of the three: The Keysight-with-all-options is probably the best, but that's going to cost a
lot more.