Products > Test Equipment
Siglent SDS800X HD Review & Demonstration Thread
Martin72:
--- Quote from: Martin72 on May 07, 2024, 05:21:17 am ---Hi Dave,
Start with this please:
https://www.eevblog.com/forum/testgear/sds800x-hd-review-demonstration-thread/msg5483791/#msg5483791
--- End quote ---
Dave?
markone:
--- Quote from: Martin72 on May 06, 2024, 08:11:02 pm ---This is also a very exciting topic that "deserves" its own thread.
Let's see if a moderator reacts, then he can also take this post with him.
Again 50Mhz 0dBm, Siglent 824X HD, 50Ohm termination.
Span 10khz, so far so clear.
I have combined 2 tracks, the current one is at a vertical setting of 110mV/div (C1), the REF B track(purple) is at 100mV/div.(C1)
--- End quote ---
Hi Martin,
could you try again with also 50KHz and 1MHz SPAN ?
Here below my results, very same settings :
10KHz SPAN :
50KHz SPAN :
1MHz SPAN :
I would say unusable, in order to eliminate false spurious at this center frequency you have to raise RBW to a much higher value (222Hz ---> 3.56KHz) :
and the whole picture is much less interesting.
Useless to say, sourced signal is clean with SSA :
where are missing also the small spurious present in 10KHz SPAN spectrum images (your and mine).
I would say that SDS800x FFT is not usable at low RBW (in relation to the central frequency), if you guys can say with certainty that there are no bugs in the FW FFT implementation my interest in this functionality, apart from a few cases at quite low frequencies, ends here.
KungFuJosh:
--- Quote from: electronics hobbyist on May 11, 2024, 01:30:39 am ---Your pictures cannot be enlarged, cannot see the details clearly.
--- End quote ---
Open the images in a new window or tab
electronics hobbyist:
--- Quote from: KungFuJosh on May 11, 2024, 04:20:00 am ---Open the images in a new window or tab
--- End quote ---
Thank you, I have deleted the previous post. From these pictures, it appears that this phenomenon occurs when the number of points is >= 10M.
ebastler:
--- Quote from: electronics hobbyist on May 11, 2024, 05:45:48 am ---From these pictures, it appears that this phenomenon occurs when the number of points is >= 10M.
--- End quote ---
So, potentially an error in the down-sampling to the FFT's 2 MPt maximum?
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