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Advice on oscilloscope

Hello all! BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB (long time no C)
First of all, I wish you all a happy new year, much good things to you and your beloved ones :)!

Since my first message & project log, I continue learning electronics every day, and I've come to a point where I need tools to experiment, measure & debug what I'm doing. For me, after the bench power supply, the most important tool is an oscilloscope.

I did some research already, and found information about sample rate, maximum frequency, probes... but I still now little about oscilloscope brands and their quality / price value.

I am currently experimenting with an ESP8266 (and I plan to work with an ESP32 for a wi-fi / BT project), and I'd need to be able to follow what it's doing. The ESP8266 runs @ 80MHz minimum (though outputs cannot switch faster than @ 40MHz, since 2 CPU cycles are needed to toggle a pin).

So I think a correctly sized oscilloscope would be able to :
- provide at least 2 channels, 4 would be more confortable, but I don't think I'd need them
- sample correctly signals with frequencies up to 40-50MHz, perhaps more ? (ESP32 runs @ 120Mhz minimum)
- have enough samples memory to capture & analyse later (see next point)
- decode most known protocols (USB, I²C, I²S, SPI, UART...)

An included function generator and/or digital analyser would be a plus, but not a necessity. I could by a dedicated tool later)
I don't really need to have a PC connection + software, though that would be a nice plus, too (so I can save captures on HDD an analyse them later)
I do not need probes for AC current for now, and I guess they can be purchased later on.

I think I can put a budget of 600-700€ maximum, and the equivalent in bucks if bought in the US.

Do you think the budget is high enough for what I'm looking for? Do you have a model in mind that can suit those criteria? Which brand would you recommand me?

Thanks a lot for you help :)!
 
Thanks for your help :).
If I stick to the tips in the wikihow, my ESP8266 works at 80MHz and takes 2 clock cycles minimum to toggle a pin. So an on / off cycle at maximum speed would be 20MHz. As it's a digital signal, I shall follow the 9th harmonic rule, which leads to a scope with minimum 200MHz bandwith. Not sure I can stick it into the budget :S, but I'll try.

The second link talks about quite expensive brands, as they spend a lot in R&D. Do you think Rigol would be a better choice?
 
It looks like a bit too low spec for I plan to do with such a tool. But it's impressively quite cheap!
I've gathered few models, I'll put the links here when I've got time
 
Siglent seems to provide a good range of products in my budget, that's good news :)
Moreover, they provide the ability to be upgraded with digital analysers and function generators (though expensive ! The software prices are a joke)
I can take the 200Mhz 2 channels model, or go better and switch to 4 channels or 350Mhz BW.
Which one would you recommand me for the needs explained in my first post?
Options are :
SDS2202X-E (539€) 200MHz, 2 channels
SDS2204X-E (659€) 200MHz, 4 channels
SDS2352X-E (729€) 350MHz, 2 channels
All are the same for other params : 28Mpts, 2Gs/s for 1 channel & 1Gs/s for 2 channels, serial bus decoding...
 
I continued to search, and found SDS1202* models too (mentionned by Tauthech). What I found about them is that they have hald the sample rate and half the memory (thus, same recording duration), so they should do the trick. However, it seems that the SDS1202* do not have the ability to be upgraded with a digtal analyser, so I should stay on SDS2202X-E model.
I also had a look at other brands, and did not find scopes within the same price range with same characteristics...

Oh by the say, the prices were tax free :p In France, the SDS2202X-E is priced at ~650€...
The equivalent Rigol (DS2202A) is at 719€ in France.

I think I'll go for the SDS2202X-E then.
 
I went away and ordered the SDS1204X-E (I thought it was SDS2204, but I was wrong), since I think that 2 more channels may become useful some day. Thank you all for your help :)
 
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