Products > Test Equipment
Siglent SDS800X HD Review & Demonstration Thread
markone:
--- Quote from: ebastler on May 11, 2024, 03:01:35 pm ---
--- Quote from: markone on May 11, 2024, 02:14:04 pm ---the sad truth is still "selected RBW values not working" and "utterly wrong"
--- End quote ---
Is this one acceptable? SDS814X HD, upgraded to 824.
--- End quote ---
What have you changed from your previous spectrum image ?
2N3055:
--- Quote from: gf on May 11, 2024, 03:00:33 pm ---
--- Quote from: 2N3055 on May 11, 2024, 02:36:12 pm ---If you insist..
It makes no difference. I set it to 500KHz to better see details..
Attached 1, 2 and 10 MHZ span....
--- End quote ---
One difference I still see is 100mV/div versus 200mV/div.
--- End quote ---
That is not problem. I use 200mV/div, because IMD for close in peaks is few dB better that way.
Even with SA you don't use full scale for distortion measurements.
With 100mv/div, slightly more distortion, nothing else.
markone:
--- Quote from: gf on May 11, 2024, 03:00:33 pm ---
--- Quote from: 2N3055 on May 11, 2024, 02:36:12 pm ---If you insist..
It makes no difference. I set it to 500KHz to better see details..
Attached 1, 2 and 10 MHZ span....
--- End quote ---
One difference I still see is 100mV/div versus 200mV/div.
--- End quote ---
I noted too, but in my case @ 200mV/div the spurious level up.
markone:
--- Quote from: 2N3055 on May 11, 2024, 03:08:36 pm ---
-snip
With 100mv/div, slightly more distortion, nothing else.
--- End quote ---
I can confirm.
ebastler:
--- Quote from: markone on May 11, 2024, 03:07:23 pm ---What have you changed from your previous spectrum image ?
--- End quote ---
Adjusted the signal generator frequency such that the scope "sees" an exact 50 MHz. I wanted to get the point across that we are seeing harmonics beyond the Nyquist limit, folded back in the spectral range, if the input frequency is slightly off. Doesn't look like a bug to me.
My guess would be that 2N3055 sees less of them since he is using a better signal generator.
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