HOW TO CALIBRATE SIGLENT SDG1032X - Page 1
Forum section: electronics / testgear

author: uargo
author_rank: Regular Contributor
timestamp: October 14, 2023, 05:57:53 pm
content: Hello, I bought a Siglent SDG1032X signal generator and a Siglent SDS1104X-E oscilloscope in 2019, but playing with telnet I deleted the calibration file and the serial number of the SDG1032X, now that I have just bought a Siglent SDM3055 5-digit bench multimeter and a half this week, I want to take the opportunity to calibrate the SDG1032X.I have written an email to Batronix where I bought it to explain how to calibrate it and/or to provide me with the calibration scripts. They replied that I should consult Siglent directly. I consulted Siglent a week ago and they have not responded.Can someone here explain to me how to calibrate the SDG1032X and give me the calibration scripts, thanks in advance.And by the way, you know how to calibrate the SDS1104X-E and if you explain it to me, it would be perfect.

author: tautech
author_rank: Super Contributor
timestamp: October 14, 2023, 06:11:00 pm
content: Quote from: uargo on October 14, 2023, 05:57:53 pmMaybe our recovery packages can help.Send PM with your email address.QuoteNot available.Update to latest FWandOS then run Self Cal after prescribed warm up period.

author: uargo
author_rank: Regular Contributor
timestamp: October 14, 2023, 07:30:47 pm
content: Thank you very much I await your PM

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 07:35:04 pm
content: Hello Tautech, thank you very much for the recovery kit, I put it on a USB and it ran, it seemed to work, but it stayed the same since it already worked and I already had the latest version of the software.That is to say, it stayed the same as it was.Recovering the old telnet thread on the SDG1032X, I was able to manually modify the file by Telnet and put my real serial number back into it.But calibrate it I still don't know how to calibrate it...My reference is the SDM3055 that I bought a week ago and it comes calibrated.Well, putting the SDG1032X in:C1: DC 1mV the SDM3055 measures 2.762mV and the UT-71E measures 2.7mVC2: DC 1mV the SDM3055 measures 2.834mV and the UT-71E measures 2.8mV

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 07:43:09 pm
content: If anyone knows how to calibrate it and explains it to me, I would appreciate it.In the old service manual it refers to a calibration script and gives a link that no longer exists. I think years ago this calibration script was available, today there is no trace of it, and I don't know if the current firmware allows it...

author: tautech
author_rank: Super Contributor
timestamp: October 16, 2023, 07:56:10 pm
content: Try restoring factory settings from the Help menu.P34https://siglentna.com/wp-content/uploads/dlm_uploads/2020/12/SDG1000X_ServiceManual_SM0201X-E01B.pdf

author: KungFuJosh
author_rank: Super Contributor
timestamp: October 16, 2023, 08:18:22 pm
content: Quote from: uargo on October 16, 2023, 07:35:04 pmHow are you outputting 1mVDC from your AWG? The signals are generally AC, with the option for a DC offset.Thanks,Josh

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 08:20:26 pm
content: Quote from: tautech on October 16, 2023, 07:56:10 pmThanks Tautech I have done it, but it's still the same

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 08:23:39 pm
content: Quote from: KungFuJosh on October 16, 2023, 08:18:22 pmBeing on channel 1 (for example), press the "waveform" key then go to page 2, click on "DC", and with "DC Offset" you choose the voltage.It leaves you from -10vdc to 10vdc

author: tautech
author_rank: Super Contributor
timestamp: October 16, 2023, 08:26:34 pm
content: Quote from: uargo on October 16, 2023, 07:43:09 pmYes, Cal scripts are now confidential.As advised, return to Siglent in Germany for recalibration.

author: KungFuJosh
author_rank: Super Contributor
timestamp: October 16, 2023, 08:29:38 pm
content: Quote from: uargo on October 16, 2023, 08:23:39 pmTry testing the ACVrms and see if that comes back accurately.

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 08:29:46 pm
content: ok thanks Tautech

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 08:34:44 pm
content: SDG1032X - Sine wave 1KHz 1mVrmsSDM3055 = 0.991 mVrmsSDG1032X - Sine wave 1KHz 1VrmsSDM3055 = 1.00850 Vrms

author: KungFuJosh
author_rank: Super Contributor
timestamp: October 16, 2023, 08:39:40 pm
content: Quote from: uargo on October 16, 2023, 08:34:44 pmThat's pretty good. Now, try again, and view the DC voltage BEFORE applying any DC Offset.

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 08:46:33 pm
content: Quote from: KungFuJosh on October 16, 2023, 08:39:40 pmWhen I talk about DC it is a pure DC, without AC of any kind.and continues measuring the same as before

author: tautech
author_rank: Super Contributor
timestamp: October 16, 2023, 08:48:22 pm
content: Quote from: KungFuJosh on October 16, 2023, 08:39:40 pmThinking 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

author: alm
author_rank: Super Contributor
timestamp: October 16, 2023, 08:49:19 pm
content: Quote from: uargo on October 16, 2023, 08:23:39 pmThat's standard and documented in manuals for at least HP/Agilent/Keysight arbitrary waveform generators. Dave even made avideo about it.Quote from: tautech on October 16, 2023, 08:26:34 pmI'm hoping Siglent know the difference between calibration and adjustment...Why would they make adjustment scripts confidential? It's not like something like an AWG or power supply needs extremely expensive, rare equipment to adjust. For this adjustment a good DMM would probably all that's necessary.Quote from: tautech on October 16, 2023, 08:48:22 pmThat's true, looking at the initial measurements they seem to be within the 1% + 3 mV uncertainty as specified in the manual. So I wouldn't count on sending it for adjustment changing anything.

author: KungFuJosh
author_rank: Super Contributor
timestamp: October 16, 2023, 08:49:48 pm
content: Quote from: uargo on October 16, 2023, 08:46:33 pmAn AWG is not a DC voltage reference.For better reference, here's my SDM3055 and SDG2122X:AWG: 1VACrmsDMM: 0.99997VacDMM: -2.748mVdcAWG: 1Vdc OffsetDMM: 0.99922VdcAWG: 1mVdc OffsetDMM: -1.788mVdcHere we can see that (ignoring likely minor voltage loss over the cables) that the DC offset is only an offset, and not an accurate voltage source without knowing what voltage you're actually offsetting.Test DC before and after applying offset and you can see how accurate the offset is.

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 08:52:37 pm
content: Quote from: KungFuJosh on October 16, 2023, 08:29:38 pmI already imagined it, but the calibration plus the round-trip shipping is respectable money.What I don't understand is that Siglent itself has released a menu to calibrate them in the latest firmware of its multimeters, and in the SDG1032X it cannot be done.

author: tautech
author_rank: Super Contributor
timestamp: October 16, 2023, 08:53:20 pm
content: Quote from: alm on October 16, 2023, 08:49:19 pmChecking if specs are met is outlined in the SM under Performance verification which anyone can do with the prescribed equipment.Adjustment is a SW process and I know US branch has a Fluke 5200 for such needs. Not sure about EU.

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 08:54:48 pm
content: Quote from: tautech on October 16, 2023, 08:48:22 pmyes yes, but i need more precision

author: alm
author_rank: Super Contributor
timestamp: October 16, 2023, 08:59:39 pm
content: Quote from: tautech on October 16, 2023, 08:53:20 pmWhy 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?

author: KungFuJosh
author_rank: Super Contributor
timestamp: October 16, 2023, 09:00:32 pm
content: Quote from: uargo on October 16, 2023, 08:54:48 pmYou 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.

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 09:06:39 pm
content: Quote from: KungFuJosh on October 16, 2023, 09:00:32 pmI'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.

author: KungFuJosh
author_rank: Super Contributor
timestamp: October 16, 2023, 09:13:05 pm
content: Quote from: uargo on October 16, 2023, 09:06:39 pmAs 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/#newThere 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.

author: uargo
author_rank: Regular Contributor
timestamp: October 16, 2023, 09:20:54 pm
content: Quote from: KungFuJosh on October 16, 2023, 09:13:05 pmYes I know, but it is what I have, I have the riden rd6006p that is quite accurate but it is switched and has some ripple.I will have to buy a precise linear laboratory supply and use a potentiometer to reduce the voltage

author: KungFuJosh
author_rank: Super Contributor
timestamp: October 16, 2023, 09:23:43 pm
content: Quote from: uargo on October 16, 2023, 09:20:54 pmI get where you're coming from, but possession and budget don't redefine what a device is capable of. On the bright side, you don't need to waste any money on getting your AWG calibrated since it appears fine.If I was doing something like what you're doing, I would look and see if the specs on something like the SPD3303X-E were sufficient for your needs. If not, then you need to look at voltage sources specifically, and that can get expensive for high accuracy.

author: tautech
author_rank: Super Contributor
timestamp: October 16, 2023, 09:37:13 pm
content: Quote from: alm on October 16, 2023, 08:59:39 pmSorry a $ $ Fluke universal calibrator, 5200 is wrong then.

author: alm
author_rank: Super Contributor
timestamp: October 16, 2023, 09:59:47 pm
content: Quote from: uargo on October 16, 2023, 09:20:54 pmI'd just build a fixed voltage divider, say 10:1 or 100:1, and adjust the voltage from the power supply/function generator. Be aware of the trade-off between output impedance / load regulation and dissipation in the resistors. If you use a pot, make sure you don't exceed their maximum dissipation.Quote from: KungFuJosh on October 16, 2023, 09:23:43 pmIs the SPD3303 really any better at the 1 mV level?In addition to the Elektor project the PVDS2mini comes to my mind as reasonably affordable DC voltage source. Though not sure if Ian is currently able to produce them.Quote from: tautech on October 16, 2023, 09:37:13 pmMaybe I'm dense, but what good does a multifunction calibrator, which can generate a variety of DC and AC voltages (typically up to 1 MHz), currents and resistances do for adjusting a source like a function generator or power supply?

author: bdunham7
author_rank: Super Contributor
timestamp: October 16, 2023, 10:01:13 pm
content: Quote from: KungFuJosh on October 16, 2023, 09:13:05 pmNot "precision" perhaps, at least not at the level the OP seems to need, but these AWGs are a perfectly fine source for DC voltages within reason and reading the specs, of course. They're also not a terrible current source within their limitations. They're stable enough to do calibration of lesser DMMs in tandem with a better one and supply enough current for many small DC breadboard projects. You can even use them to test linear voltage regulator circuits for ripple rejection and transient response. If you really want to be ridiculous, you can charge small batteries with them!

author: KungFuJosh
author_rank: Super Contributor
timestamp: October 16, 2023, 10:34:54 pm
content: Quote from: bdunham7 on October 16, 2023, 10:01:13 pmPrecision was what he was asking for though. For basics it's fine. He wants under 1mV accuracy, but even the SDG2122X is spec'd as ±(1%+2mV) for DCV. TBH I've never used it for just DC, and it's pretty cool that the option is there.Edit: I just checked and the SDG1032X is spec'd at ±(1%+3 mV) for DCV.

author: bdunham7
author_rank: Super Contributor
timestamp: October 17, 2023, 12:21:30 am
content: Quote from: KungFuJosh on October 16, 2023, 10:34:54 pmYes, he either needs an SMU or he needs to have a higher precision meter in parallel--and there still may be stability issues.Interestingly, the SDG2042X appears to be the most accurate source of DC voltage I have on my bench, and that includes a PD 5020 "Precision DC Source" that sports an LM399 reference.

author: KungFuJosh
author_rank: Super Contributor
timestamp: October 17, 2023, 01:30:00 am
content: Quote from: bdunham7 on October 17, 2023, 12:21:30 amIt's probably my most accurate (adjustable) voltage source on my bench too...at least until I finally bite the bullet and build that Elektor project. OTOH, I don't know if I should trust it, but I have a TP3005P bench PSU that my SDM3055s thinks is accurate. 2VDC shows 1.9999V, 20V shows 20.004V, 30V shows 30.005V, 10mV (lowest possible) shows 9.738mV. That's not too shabby.🤷