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Picoscope 3203D sampling rate / sample interval

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markone:
Few days ago I purchased a Picotech 2204A with the aim to make an assessment of Picoscope platform (I have a customer that could be interested in this kind of instruments).

It took me little time to spot some evident limitations, some were expected due to price category of the device (which I would define "for educational purpose") but other not.

For example, applicable sample rates are constrained in a power of two rule like (from 2000 programming guide) :

"A PicoScope 2000 Series oscilloscope can sample at a number of different rates that correspond to the maximum sampling rate divided by 1, 2, 4, 8 and so on."

It follows that it is not possible to select simple sample interval like (i.e.) 10us, where the nearest obtainable value is 10.24us .

So I was  wondering if an higher model, like the 3203D, is capable to do that  but reading the related programming guide, again, it seem not to be the case (see attachment).

Does anyone with a similar model confirm or deny that ?

voltsandjolts:
3000

5000

markone:

--- Quote from: voltsandjolts on December 09, 2022, 01:43:48 pm ---3000

5000

--- End quote ---


I get that you missed my previous post attachment, where you can see an extract from the very first document that you linked; 5000 series is out of scope.

I need a boolean answer : is the 3203D capable to block capture with (i.e.) with 10us sample interval ?

From the formula inside the extract it seems not the case, but of course i could be wrong.

voltsandjolts:
The answer is in your own OP and backed up by the documentation I linked.


--- Quote ---The range of timebase values is divided into two subranges, with the subrange 0 to 2
specifying a power of 2, and the subrange greater than 2 specifying a number divided
by 125,000,000. The maximum value is 23^2–1.
--- End quote ---

It can't be any clearer.

e.g. n=1252   =>  (1252 - 2) / 125,000,000 = 10us exactly

markone:

--- Quote from: voltsandjolts on December 09, 2022, 08:43:57 pm ---The answer is in your own OP and backed up by the documentation I linked.


--- Quote ---The range of timebase values is divided into two subranges, with the subrange 0 to 2
specifying a power of 2, and the subrange greater than 2 specifying a number divided
by 125,000,000. The maximum value is 23^2–1.
--- End quote ---

It can't be any clearer.

e.g. n=1252   =>  (1252 - 2) / 125,000,000 = 10us exactly

--- End quote ---

Sorry, I completely misinterpreted the two subranges table structure  :palm:

So the boolean answer is : Yes, it can :)

Thank you for your help, now it's matter to find an 3203D.

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