Products > Test Equipment
HOW TO CALIBRATE SIGLENT SDG1032X
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uargo:

--- Quote from: tautech on October 16, 2023, 08:48:22 pm ---
--- Quote from: KungFuJosh on October 16, 2023, 08:39:40 pm ---
--- Quote from: uargo on October 16, 2023, 08:34:44 pm ---SDG1032X - Sine wave 1KHz 1mVrms
SDM3055 = 0.991 mVrms

SDG1032X - Sine wave 1KHz 1Vrms
SDM3055 = 1.00850 Vrms

--- End quote ---

That's pretty good. Now, try again, and view the DC voltage BEFORE applying any DC Offset.

--- End quote ---
Thinking same.
When compared to Output Characteristics from the datasheet (P8) it seems within spec.
https://int.siglent.com/u_file/download/22_06_23/SDG1000X_DataSheet_DS0201X_E01I.pdf

--- End quote ---

yes yes, but i need more precision :(
alm:

--- Quote from: tautech on October 16, 2023, 08:53:20 pm ---Adjustment is a SW process and I know US branch has a Fluke 5200 for such needs. Not sure about EU.

--- End quote ---
Why would they need a seventies-era AC voltage source to adjust an arbitrary function generator? DMM, scope, maybe power meter and spectrum analyzer for flatness and harmonics, but why a voltage source?
KungFuJosh:

--- Quote from: uargo on October 16, 2023, 08:54:48 pm ---yes yes, but i need more precion :(

--- End quote ---

You haven't demonstrated a lack of precision yet.

Measure your DC voltage WITHOUT offset applied.
Measure your DC voltage again WITH offset applied.
See if the difference in DC voltage is equal to what you set as the offset.
uargo:

--- Quote from: KungFuJosh on October 16, 2023, 09:00:32 pm ---
--- Quote from: uargo on October 16, 2023, 08:54:48 pm ---yes yes, but i need more precion :(

--- End quote ---

You haven't demonstrated a lack of precision yet.

Measure your DC voltage WITHOUT offset applied.
Measure your DC voltage again WITH offset applied.
See if the difference in DC voltage is equal to what you set as the offset.

--- End quote ---

I'm using the SDG1032X as a precision  DC voltage source to test a 16-bit ADC to see how accurate and stable my design is, noise levels etc.
KungFuJosh:

--- Quote from: uargo on October 16, 2023, 09:06:39 pm ---I'm using the SDG1032X as a precision  DC voltage source to test a 16-bit ADC to see how accurate and stable my design is, noise levels etc.

--- End quote ---

As I said earlier, an AWG (in this case the SDG1032X) is NOT a precision DC voltage source. DC Offset is COMPENSATION only. The lower your voltage is, the less accurate it will be especially when you factor in voltage loss over cables. From what you posted, your AWG appears to be functioning as expected.

If you need a DC voltage source with that much accuracy, you need to buy or build an actual voltage source. This thread has a (not cheap) DIY DC voltage source: https://www.eevblog.com/forum/testgear/elektor-voltage-current-calibrator-project/new/#new

There are some great inexpensive DC voltage sources out there, but not with super high accuracy or adjustable voltages. If you're on a budget, you'd probably be better off getting a calibrated DC Bench PSU with good adjustment ability.
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