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Help a beginner to choose an oscilloscope from the limited brands amount!
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bdunham7:

--- Quote from: IRG7PSH73K10 on April 19, 2022, 11:42:26 pm ---But if you think 0,25 GSa\sec will be fine - I'd probably go for a Rigol cheapie.

--- End quote ---

I had a Rigol DS1054Z, and while the Siglent SDS1104X-E I replaced it with was way better in many ways, the Rigol was still a lot of scope for the money, especially in earlier days.  Given your particular circumstances and the pricing of stuff, it (the DS1054Z) probably is your best bet.

I no longer have a DS1054Z, but as far as a 50ns rise time with 250MSa/s, here is a 500ns pulse with a 50ns leading edge rise time shown (on an entirely different 350MHz + BW scope) at 20MSa/s, 200MSa/s and 2GSa/s.  I think you can clearly see that 200MSa/s is 'enough', but 20MSa/s is clearly not.  So the sample rate will not be likely be much an issue for you if that is anything like what your pulse looks like.

IRG7PSH73K10:

--- Quote from: MikeK on April 20, 2022, 02:03:49 am ---Rigol DS1202Z-E (200 MHz, 2ch.) for $299.

--- End quote ---
I'm looking for a 4ch. scope, that's why DS1054z on the list.
Main question I'm thinking about: what sample rate do I actually need to observe ~50 nsec di\dt MOSFET's? Rigol1000\Micsig grants 0,25 GSa\sec., and that's just about 12 points. For example, will I be able to detect voltage spikes if the snubbers are not enough?
If yes - then I must choose DS1054z or STO1104c
If no - then I must buy MSO5074 despite of it's horrible, ugly design + slow and buggy software and awful FFT.
IRG7PSH73K10:

--- Quote from: bdunham7 on April 20, 2022, 02:33:18 am ---the DS1054Z probably is your best bet.

--- End quote ---
Thanks alot for this screens' comparsion! Clearly, it's not much differense between 0.2 GSa\s and 2 GSa\s in this case as I can see.
So, the conclusion is:
DS1054Z = overall best bang for buck
STO1104c = mobility, better FFT, speed, screen, and design for x2 price.
MSO5074 = separated knobs, Bode plot, and bigger GSa\s in it's pants for x2.2 price.
And all 3 of them will do the job.

Must deside now, should I spent another 400-450 bucks for these extra features...
rf-loop:

--- Quote from: IRG7PSH73K10 on April 20, 2022, 03:28:00 am ---
--- Quote from: bdunham7 on April 20, 2022, 02:33:18 am ---the DS1054Z probably is your best bet.

--- End quote ---
Thanks alot for this screens' comparsion! Clearly, it's not much differense between 0.2 GSa\s and 2 GSa\s in this case as I can see.
So, the conclusion is:
DS1054Z = overall best bang for buck
STO1104c = mobility, better FFT, speed, screen, and design for x2 price.
MSO5074 = separated knobs, Bode plot, and bigger GSa\s in it's pants for x2.2 price.
And all 3 of them will do the job.

Must deside now, should I spent another 400-450 bucks for these extra features...

--- End quote ---


Considering everything you have said and your situation in this time. Also considering exactly noted the models mentioned in this quoted post: As @ bdunham7 said: DS1054Z
(if price / availability situation is different and your current situation in other ways is different but same technical needs overall, my recommendation is SDS1104X-E)
Fungus:
Looks like you've done your homework before posting!  :clap:


--- Quote from: bdunham7 on April 20, 2022, 02:33:18 am ---Given your particular circumstances and the pricing of stuff, it (the DS1054Z) probably is your best bet.

--- End quote ---

Yep. It's perfectly capable of doing the job, there's really no need to spend any more money than that.
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