Siglent SDG1000X Waveform Generators

[eTobey]

Amplitude limit does nothing to the absolute values. 
Ever heard of "offset"? Ever comprehended what that means? 

[BillyO]

Amplitude limit does nothing to the absolute values. 
Ever heard of "offset"? Ever comprehended what that means? 

Yes, but apparently you don't. 

I just tried in right now.  I set the Amplitude limit to 6Vpp and was unable to add any offset that put the output beyond that.

Have you even tried it?

Here, I have a solution for you.  Sell or giveaway the Siglent to someone that will use it properly, then go randomly buy a GW Instek or an Owon or such without looking at the docs.

[ebastler]

I guess eTobey's point was that you cannot set asymmetrical "safety rails" for the output voltage -- e.g. limit it to a range from 0V to 3V.

That would indeed be a nice feature: Since you can define the operating output via either amplitude/offset or high/low voltages, it feels logical that the "safety rails" should support the same settings.

[eTobey]

Amplitude limit does nothing to the absolute values. 
Ever heard of "offset"? Ever comprehended what that means? 

I just tried in right now.  I set the Amplitude limit to 6Vpp and was unable to add any offset that put the output beyond that.

Add a modulation, and you will get over that limit... I think i used ramp up AM modulation.

Edit:
Tried to reproduce, but couldnt.
But found something else: Setting low level at 0 and then high level above limit, sets low level at -1.5V.  I guess this is a feature?

Edit 2:
I got it wrong:
Not the set up "limit" was exceeded, it was the amlitude of 3 V that can be ecxeeded with modulation.

Edit 3:
Changing values with the knob has some issues:
Turned from 220mv to zero, and back up: Went from 0 straigth to 220mV with one step. It dissappeared after trying to figure out.

[Mortymore]

Siglent SDG1032X

No amplitude limit, CH1 sinusoidal 100KHz, 4Vpp no offset


Power On - CH1 output ON on startup
(Utility - Output Setup - Pg2/2 - Power on State - ON)





Power Off



Power Off with previously set of output limit to 4.002Vpp
(Utility - Output Setup - Pg2/2 - Amplitude - 4.002Vpp)



With the output limit to slightly above (0.002V) the output voltage, the voltage swing before shutdown was actually higher. 

[eTobey]

Try using square wave. And see what it does when going from sine to square.

[Mortymore]

The SDG1032X does nothing much different from my old analog Signal Generator when switching between wave settings, trough relays

EDIT: except that the transition is not done at 0V, and a DC voltage of some 500mV over the max 2V is present during 5ms and lowers to 2V during another 6ms
That DC level presence during transitions, may or may not of concern, but it's good to be aware of.

SDG1032X: 4Vpp, 100KHz, switching from sinusoidal (just before triggering) to square wave




FG-801: 4Vpp, 100KHz, switching from sinusoidal to square wave

[patrik96]

Hi, may someone help for,
My SDG1032 one chanel goes suddenly to Overvoltage protection mode, and remain it whithout any extra load in the output.
It is remain that state and if it swithc off -7,2 or -4.9V DC appired on the output depending the output amplitude setting, but no AC

[tautech]

Hi, may someone help for,
My SDG1032 one chanel goes suddenly to Overvoltage protection mode, and remain it whithout any extra load in the output.
It is remain that state and if it swithc off -7,2 or -4.9V DC appired on the output depending the output amplitude setting, but no AC

Consult the service manual for checks and measurement you can do:
https://int.siglent.com/u_file/download/24_01_02/SDG1000X_ServiceManual_SM0201X-E01B.pdf

Just one channel showing a fault ?

[patrik96]

Dear Tautech,

Thanks your answer, yes it is one chanel issue, the other fine,

[tautech]

Dear Tautech,

Thanks your answer, yes it is one chanel issue, the other fine,

Does Factory Default remedy the fault ?

[patrik96]

That is the first what I try, Unfortuneately it clear the error massage only, now there is no error but no output and -4.9V (or more ) in the CH1

[tautech]

That is the first what I try, Unfortunately it clear the error massage only, now there is no error but no output and -4.9V (or more ) in the CH1

It would seem you have an output stage repair to do.

I looked through this thread for help and guidance but found zero.
Maybe others can offer advice.

[Martin72]

Consult the service manual for checks and measurement you can do:
https://int.siglent.com/u_file/download/24_01_02/SDG1000X_ServiceManual_SM0201X-E01B.pdf

Whenever I see a “Service Manual” from Siglent, I have to smile.
Take a measurement here, take a measurement there, otherwise send it in.
No circuit diagrams, no parts lists....
These are not service manuals as we know them.

[tautech]

Consult the service manual for checks and measurement you can do:
https://int.siglent.com/u_file/download/24_01_02/SDG1000X_ServiceManual_SM0201X-E01B.pdf

Whenever I see a “Service Manual” from Siglent, I have to smile.
Take a measurement here, take a measurement there, otherwise send it in.
No circuit diagrams, no parts lists....
These are not service manuals as we know them.

As it should be. 
Basic checks are always the first thing to be undertaken when assessing if a problem exists.

User repairs can impact on performance.
In most cases PCB replacement is the only way to reclaim original guaranteed performance.

[Martin72]

As it should be.

No.
Service manuals are actually repair instructions.
What siglent turns them into are “extended” user instructions.

[Wrenches of Death]

Service manuals are actually repair instructions.
What siglent turns them into are “extended” user instructions.

The Tektronix manuals back in the day are a shining example of what an instrument SERVICE manual actually was and should be.

ALL part numbers and part descriptions, exploded diagrams, parts location identification, theory of operation of the instrument, detailed troubleshooting information like voltages, resistances, scope patterns during operation, adjustments and full calibration instructions, etc.

They actually WANTED you to be able to repair the instrument.

"Service" manuals today are a joke.

Hell, stuff today doesn't even come with a users manual.

WoD

[2N3055]

All this lamentation how manuals today (which means last 10-15 years) are not real service manuals is all well but helps nobody.

This "new practice" was "invented" long time ago by Western companies (before likes of Rigol and Siglent existed).
It is a consequence of the fact that manufacturers actually stopped component level servicing in field.
It is module level servicing and old boards are either discarded or sent to manufacturer directly for internal rework process.
That is simple consequence of the fact that firstly equipment is more reliable than it was, it is more complicated than it was, and keeping service and part distribution network is expensive. It is cheaper to simply swap little board than spend hours troubleshooting. Quality of repair is not guaranteed and depends entirely on technicians skills. Work hours are sometimes more expensive than device. And then full equipment to calibrate/verify specs is needed. Also back then, many manufacturers had government contracts that stipulated component level repair process, and they had no choice. Then they realized that it is simpler, faster and most of the time cheaper to simply have replacement full devices or ready made subassemblies.
Times changed.

As to a problem that patrik96 has:

- it is probably a damage to channel output circuits.
- it can be sent to Siglent for repair, or
- if it is out of warranty, by using instructions from Service manual, it can be carefully opened ( in static safe environment ) and then you take a look. AWG has 2 channels and the one that works can serve as a reference for comparisons.

[ebastler]

This "new practice" was "invented" long time ago by Western companies (before likes of Rigol and Siglent existed).
It is a consequence of the fact that manufacturers actually stopped component level servicing in field.

That's a good point. Service manuals were never provided as a nice gesture to hobbyists and collectors, but as a tool for the company's own field service techs or authorized 3rd party workshops. Since these use a different approach to service and repair now, there is no economic reason to produce detailed service manuals for part-level troubleshooting. Which is a pity for us hobbyists nevertheless...

[Martin72]

Exactly, which is why it is not a service manual and should not be described as such.
The service manual contains everything you need to know to be able to repair a device and is generally not freely available and only intended for (authorized) workshops.
That's all I meant when I wrote that I always have to smile when siglent service manuals are mentioned.
I would rather call it “SXXXXXX extended troubleshooting” in siglent's place or include it as an appendix in the manuals.
To the actual matter:
If patrik96 hasn't found a solution by then, I can come up with some useful tips on Monday, as I will then have access to an SDG1062X.
Unless the output stages are the same for SDG1000X and SDG2000X, then sooner...

[Mortymore]

Just don't call it "service manual", if the manual does not provide the required information for servicing.

Problem solved

[2N3055]

Just don't call it "service manual", if the manual does not provide the required information for servicing.

Problem solved

It does.
That IS servicing today.
Board level repair is not part of field service.
Same as with a PC.
Service will change graphic card with another one. If it was in warranty, service will send it back to factory. If is economical, they will refurbish/rework it. If not than it is  E-waste.

Fact that we would like to repair things and are willing to spend lot's of time repairing things because we like it, does not change a fact that for companies it is cheaper this way.

[TomKatt]

Fact that we would like to repair things and are willing to spend lot's of time repairing things because we like it, does not change a fact that for companies it is cheaper this way.

Gone are the days when companies provided 'real' service manuals with component level testing data.  Or even schematics with waveform examples like you'd get in Sams Photofacts or similar.

'Repair' is pretty much just board swapping these days.

[patrik96]

Tautech, Thanks, fortuneately it is under warranties (2 years and not 1 what I remember)

Meantime I was found a topic where was repaired a smae issue:
https://www.eevblog.com/forum/repair/siglent-sdg1062x-goes-to-overvoltage-protection-mode/

Service manual: yes it is not a tool for service, but basically noone repair a 200-300€ equipment in a component level because of the high service hour fee,
And not forget today car manual said to not drink the battery and cooling water, and car from the past the manual described how can the ignition and valve gap adjusting and so.

[tautech]

Tautech, Thanks, fortuneately it is under warranties (2 years and not 1 what I remember)

Meantime I was found a topic where was repaired a smae issue:
https://www.eevblog.com/forum/repair/siglent-sdg1062x-goes-to-overvoltage-protection-mode/

Thanks, I know we'd dealt with this issue before at one time.

Now added to the OP as the start of a POL list.