Products > Test Equipment
Siglent - 11/20 - New SDS1104X-U, 4 channel 100MHz, 1Gsa/s economy oscilloscope
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Mechatrommer:

--- Quote from: rf-loop on December 06, 2020, 12:48:06 pm ---what ever it is. I keep this as fact, until some data what overrides this information.

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for what? why bother with rigol if you already have siglent? its like you buy a DSO just because of its FFT? man you already have your SA? you make "rf" to loop now you want to see FFT in DSO :palm:


--- Quote from: rf-loop on December 06, 2020, 12:48:06 pm ---About Siglent we have lot of data and details what it is and what not... but about Rigol... nearly like "guess what is this - play".
Do peoples buy these just for decorating some hobby corner or just playing some fun.

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for building circuit, for download data to PC so we can do serious FFT, not toyish 1Mpts FFT also possible upload to MATLAB for anyone interested. we are returning customer from 1kE to 1kZ. downloading data to PC from Siglent is "guess what is this - play" since forever, but someone hit a kill switch by saying they dont need data to PC, fine! Rigol already have name in people's heart for a decade for budget $400-500 scope, it gathered people into this forum when Dave make the first review 1kE. there was no $400 Siglent so it was no brainer. now Siglent just want to start the race, i wish them good luck! Rigol already has in-house 10GSa/s 2GHz for $10K, Siglent has half that and half that for not half that price. we will wait until Dave make review and compare both, he has both scopes. cheers.
switchabl:

--- Quote from: rf-loop on December 06, 2020, 12:48:06 pm ---About Siglent we have lot of data and details what it is and what not... but about Rigol... nearly like "guess what is this - play".
Do peoples buy these just for decorating some hobby corner or just playing some fun.

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I can only speak for myself, but: I already know the built-in FFT is horrible in the Rigol, so if I know I need it, I use something else.  :-// People "playing some fun" probably don't use it either, because it is no fun at all.

But I was curious because of all the different numbers mentioned, so I turned it on FFT for the first time in years:
I think the width of the side-lobes for a rectangular window should be (sampling frequency / number of points), so that suggests roughly 4k points, probably zero-padded to 16k?
Fungus:

--- Quote from: switchabl on December 06, 2020, 03:45:54 pm ---probably zero-padded to 16k?

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Why would they zero-pad it?

When it was initially launched it used "on-screen" data like all the other measurements, ie. 1200 points.

"Memory mode" does some extra work to fetch more sample data than what's on screen. I'm guessing they build a composite buffer by fetching many batches of 1200 points, then do the FFT on that.



jemangedeslolos:
I don't understand the positioning of this scope ?
it is perhaps intended for large institutions which will order large quantities and therefore save a lot of money compared to the X-E.

But the price difference is too small compared to the loss of specification for a one shot purshase for hobby or small business.

300€ or $ net and they will have a hard time manufacture enough I think.
In my opinion they missed the opportunity to destroy the ds1054z and all the unfinished chinese Aliexpress scopes.
tautech:

--- Quote from: rf-loop on December 06, 2020, 12:25:19 pm ---This is SDS1104X-U
And in this thing, example Siglent, and many others do not leave anything what need guess.


128kpts. 131072points aka samples and 65536 bins.  In this image sampling frequency is 50MHz and this give FFT range 0 - 25MHz. (as can see it is zoomed in lot from full scale)

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Ahh, so you have one.
Being stuck in China due to CV does have its advantages.  ;D
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