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Siglent SDG6000X series 200-500 MHz AWG's

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Detlev:

--- Quote from: hpw on April 07, 2023, 06:26:40 pm ---I mean, the R&S is in noise figures any better than the used SSA2K plus, also the close in noise figures any different.

--- End quote ---

can you say 100% that it is the spectrum analyzer or could it also be the SDG?

hpw:

--- Quote from: Detlev on April 07, 2023, 07:17:49 pm ---
--- Quote from: hpw on April 07, 2023, 06:26:40 pm ---I mean, the R&S is in noise figures any better than the used SSA2K plus, also the close in noise figures any different.

--- End quote ---

can you say 100% that it is the spectrum analyzer or could it also be the SDG?

--- End quote ---

The Siglent SSA has this limitations, even you connect an 10MHz OXCO as a reference, the used build in freq. synthesizer as walking with close-in spurs variations, do not gets any better. Already posted SSA results on this forum.

In other words, getting what you payed for... as it goes for the the SSA & SDG2K. So my interest are on SDG6K and SDG7K how they performs.

So my current conclusion is now, building a table by simulations and than compare the results with the HW gears.

Hp

tautech:
What do you need to see chaps ?
SDG6022X and analysers to 8.5 GHz here.

Detlev:

--- Quote from: hpw on April 07, 2023, 06:26:40 pm ---I mean, the R&S is in noise figures any better than the used SSA2K plus, also the close in noise figures any different.

--- End quote ---

I'm not sure what you're getting at in the discussion right now. Regarding the phase noise, I posted a screenshot above, attached again here. that with a pure sine without modulation.
You can also do this with the SSA2K plus, then we would have a comparison between the SDG6022X with the R&S FPL and the SDG2000X and the SSA2K plus.

What is wrong with the modulation for you, do you have concrete examples of what you would expect? Maybe it's me that I just don't understand you :)

Greetings and Happy Easter
Detlev

hpw:

--- Quote from: Detlev on April 08, 2023, 09:24:59 am ---You can also do this with the SSA2K plus, then we would have a comparison between the SDG6022X with the R&S FPL and the SDG2000X and the SSA2K plus.

What is wrong with the modulation for you, do you have concrete examples of what you would expect? Maybe it's me that I just don't understand you :)

Greetings and Happy Easter
Detlev

--- End quote ---

Look, I did many measurements using SSA2K Plus and SDG2K and a KS AWG. Also source from 10MHz Sine OXCO as -120dbc@1Hz. Complained Siglent about false Square wave FM & PM. At the end even the new FM & PM is in questions. So I asked for your SDG6K figures and they differ from my KS measurements.

The basic question is how the made the Square wave ... by math or using a sine to square wave circuit.

In addition the performance of the SSA is important, as low PN & Jitter & close-in noise & other spurs & low over all noise contributions.

I come now to the conclusions about the FM / PM as sine & square waves, just at first, to simulate various with high floating point precision as may the precision on the HW gear is may the limited factor.

My 2 cents

Hp


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