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Siglent SDS1x04X-E BodePlot II (SFRA) features and testings

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Warpspeed:
Bode plots of passive filters and broadband amplifiers is not that difficult because the signals being measured are going to be fairly clean. 
Its just a case of having sufficient available dynamic range, and a nice low noise floor.

The situation changes pretty dramatically when trying to characterize the feedback loop in a very noisy switching power supply. This is not an uncommon application these days, in fact for many power electronics designers, it would be the ONLY application equipment like this would ever be used for.

Can anyone demonstrate resolving millivolt and sub millivolt signals in the presence of perhaps volts of extremely fast rise time noise spikes and broad band hash?
Will it do it ?
Can it do it ?


FunJumper:
Hi Guy.

Can the Bode II setup be saved from within the Bode II application on SDS1104x-e? I only see a save data in csv. How can the Bode II setup be saved to external USB?

Thanks.
FunJumper

tautech:

--- Quote from: FunJumper on October 02, 2022, 02:24:46 am ---Hi Guy.

Can the Bode II setup be saved from within the Bode II application on SDS1104x-e? I only see a save data in csv. How can the Bode II setup be saved to external USB?

Thanks.
FunJumper

--- End quote ---
With latest firmware Bode plot settings are autosaved and returned from last use.

There is no way to save explicitly the Bode plot settings although using the Save/Recall Setup to USB should also capture Bode plot settings.

jeraymond:
What does the "Arbitrary dB" unit reference to in the Display -> Amplitude settings? Is it some unknown arbitrary reference level or is there some way to set what it references (e.g. 1V or something)?

pope:

--- Quote from: jeraymond on October 19, 2022, 11:56:06 pm ---What does the "Arbitrary dB" unit reference to in the Display -> Amplitude settings? Is it some unknown arbitrary reference level or is there some way to set what it references (e.g. 1V or something)?

--- End quote ---

Did you figure it out? I'm also not sure what the "Arbitrary dB" is.

On a different note, is there any way of choosing which trace you want to be visible? It seems to me that both the gain and the phase traces are always visible. AFAIK the sds2000x plus has this option but what about the SDS1x04X-E ? Is this feature missing?

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