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Siglent SDG2082X THD Measurements

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Conrad Hoffman:
Just got my SDG2082X and I'm really pleased with it. Most of what I do is audio, and for THD measurements I use the built in low THD oscillators in my analyzers, but I was curious about the 2082, since the specs are a bit limited. Here's a quick measurement at three frequencies, 20, 1000 and 20000 Hz. Levels are 0.1, 0.5, 1.0 and 5.0 VRMS. The sweet spot seems to be about 1V.

2N3055:
Those results are similar to SDG6052X I have.

Conrad Hoffman:
Had more time to see what the distortion looks like so I took the raw signal and residual signal output from the analyzer (HP 8903B) and put them both on the (new!) scope. Here's the 1 Vpp and 15 Vpp results. Nothing unusual. There's a bit of high frequency stuff on the 1Vpp residual that's not quite 120 Hz. Maybe a display update frequency edge or some other internal clock. I changed the waveform frequency so it wouldn't drift. Minor in any case.

KungFuJosh:

--- Quote from: 2N3055 on December 02, 2024, 06:53:02 am ---Those results are similar to SDG6052X I have.

--- End quote ---

Isn't the SDG6000X series basically an upgraded SDG2000X?

2N3055:

--- Quote from: KungFuJosh on December 03, 2024, 12:26:41 am ---
--- Quote from: 2N3055 on December 02, 2024, 06:53:02 am ---Those results are similar to SDG6052X I have.

--- End quote ---

Isn't the SDG6000X series basically an upgraded SDG2000X?

--- End quote ---

It looks the same but no..
It is 16bit, but much larger BW, so analog part is different,DAC is different..

I would think that they would have 16 bit waveform generation part similar though...

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