Products > Test Equipment
Desktop DSO for hardware and firmware development of MCU systems
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Fungus:

--- Quote from: Wilson__ on September 12, 2024, 05:04:00 am ---Now, wanting a new digital scope to help firmware debug and verify SPI/I2C analogue signal quality at 10MHz square wave.   These 4-ch scope decodes SPI full duplex traffic by hooking on MISO, MOSI, CLOCK ad nChipSelect, right?

--- End quote ---

Yes.

They also have features to (eg.) allow you to trigger on specific data values.


--- Quote from: Wilson__ on September 12, 2024, 05:04:00 am ---I can pay the high price point if necessary.  If the low side can do those specific task, it is ok too. 

--- End quote ---

For purely digital work you should put the Rigol MSO5074 on your shortlist, too. The base model can easily be unlocked to 350Mhz and it has a lot of memory, sample rate, etc.

12 bits simply isn't needed.


--- Quote from: nctnico on September 12, 2024, 09:51:26 am ---Problem is that both Rigol and Siglent only decode part of the signal which is on screen.

--- End quote ---

Simply not true for most of them these days.

(check individual models, but... generally not true)
Performa01:
Neeed to correct some clueless comments.

Just to make clear: The zoom view on a Siglent SDS2000X Plus and up is big enough compared to the small fraction of the fairly big 10" screen used for the main view, which serves as a detailed overview. There's certainly enough space for the zoom view.

And no, the list view on a Siglent always shows all captured frames in the same order and the numbering doesen't change, regardless which part is zoomed.

Attached is an old example of an SPI decoding of 245 frames, zoomed in on the last part of the stream. Main and list view show all 245 frames while the zoom view alows close inspection of any details.
KungFuJosh:
If you have the budget to go higher than the SDS2000X Plus, then compare it with the SDS2000X HD. Either one would be a great scope for your needs, and both are based on a 500MHz platform.
Wilson__:
Many thanks.  Any comment on the below four models, 1xx to 300 USD?   

What sampling rate do I need for MCU SPI signals at 10 to 40MHz clock rate. 

Kingst says 200M samples per second for 40MHz signal.  5 data points on high low cycle.

DSLogic says 10 to 100 sampling clock over SPI signal rate.

Just scanned the doc, the ngscopeclient software look amazing and promising.

nctnico:
Keep in mind that a logic analyser hides any problem in the analog domain while most problems occur in the analog domain. Many years ago I was involved in a project and the engineer at a customer had been struggling for 2 or 3 weeks to get a simple RS485 bus working on their part of the project. So I went over and disconnected the digital probes and connected the analog probes to the RS485 bus. The problem became clear within 5 minutes after that; the timing to switch between send & receive was all wrong.
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