Author Topic: Siglent SDS1202X-E compensation issue (and other manufacturers ?) (Read 131929 times)

borjam · « **Reply #275 on:** January 23, 2018, 10:44:37 am »

Quote from: Welectron on January 23, 2018, 08:36:51 am

This depends on the seller and how old his stock is. The goods units are shipping from Siglent since several weeks, but it takes time until warehouse stock has cleared.

Interesting. So, faulty units are still for sale despite the problem?

TK · « **Reply #276 on:** January 23, 2018, 11:35:39 am »

Quote from: Welectron on January 23, 2018, 08:36:51 am

Quote from: pilor001 on January 23, 2018, 07:19:58 am
Hopefully it got implemented already to EU stocks... so when I order one here it will come revised.
This depends on the seller and how old his stock is. The goods units are shipping from Siglent since several weeks, but it takes time until warehouse stock has cleared.
We have the fixed version on stock, be sure to leave us a message during checkout.

Why buyers need to leave you a message during checkout to remind you not to ship a faulty unit? And if the buyer is not aware of the issue, you will ship the old bad unit???

Feri · « **Reply #277 on:** January 23, 2018, 05:48:07 pm »

I respect Mr Tautech!

Is my device purchased on 2018.01.18 the wrong serial number?
FPGA Version: 2017.06.22
Hardware Version: 0c-01
Serial NO: SDS1EBBD1R6439.
Sorry Google translator !

Sincerely, Feri

sdouble · « **Reply #278 on:** January 23, 2018, 06:24:31 pm »

does someone know whether the units bought currently from Amazon include the caps ?

pilor001 · « **Reply #279 on:** January 23, 2018, 07:48:16 pm »

I has BB in the serial so it should be with the added Fix already ....

$\$\Omega\$$ $\$\Omega\$$

sdouble · « **Reply #280 on:** January 23, 2018, 10:00:16 pm »

I bought it from amazon us. not sure you did that if you are from hungary

pilor001 · « **Reply #281 on:** January 24, 2018, 08:04:42 am »

Will try to get it from Poland (can be cheaper)

sdouble · « **Reply #282 on:** January 24, 2018, 03:59:38 pm »

just received my unit.
bad news :
Serial number : SDS1EBAQ xxxxx
This is not the corrected version as far as I understood.
too bad.
FYI, it was bought from Amazon.com
Unfortunately, I'll leave the US tomorrow to get back to france. I won't ship it back to amazon.
Another issue I juste noticed : the baseline shows an offset of 0.7 mV. The unit has been running for 15 minutes and the offset is still there.

Diabolo · « **Reply #283 on:** January 24, 2018, 06:17:37 pm »

Hello,

Heating the unit and doing a "self calibration" should solve the offset problem.
The test is to be done.
Does the unit have the latest firmware?

Diabolo

sdouble · « **Reply #284 on:** January 24, 2018, 07:53:34 pm »

I can't check the firmware version right now.
After 1 hour , the offset reduced to 0.35 mV.
I did a self cal 15 min after the 1st boot of the scope.

sdouble · « **Reply #285 on:** January 24, 2018, 11:37:38 pm »

self cal re-done. offset reduced to 0.2 mV. At least, now I have the same offset on both channels.

tautech · « **Reply #286 on:** January 28, 2018, 12:27:36 pm »

Quote from: Feri on January 23, 2018, 05:48:07 pm

I respect Mr Tautech!

Is my device purchased on 2018.01.18 the wrong serial number?
FPGA Version: 2017.06.22
Hardware Version: 0c-01
Serial NO: SDS1EBBD1R6439.
Sorry Google translator !

Sincerely, Feri

Welcome to the forum Feri.
BBD SN# will be OK.

For those that want/need to check:
Set probe and channel input attenuation to 10x.
Connect to probe cal output at 1V/div and compensate probe.(at only 10x setting)
Use 'Fine' V/div and adjust to 1.22V/div.....no change in the waveform shape should be detectable.
1.2-1.22V/div is the step where the issue created by the missing cap is seen.

Feri · « **Reply #287 on:** January 29, 2018, 01:33:57 pm »

Dear Tautech!

Thank you for your answer!

Sincerely, Feri

josip · « **Reply #288 on:** February 05, 2018, 04:22:35 pm »

Quote from: illusive on January 09, 2018, 11:31:12 am

Just received my scope from welectron. Im very satisfied with their service, contacted them to request the BB serial number model and they happily helped. The scope itself has no problem with compensation as expected.

Same here. Received BB scope from welectron last week. BTW, really nice device, friendly interface, easy to use.

Diabolo · « **Reply #289 on:** February 05, 2018, 04:36:09 pm »

Hello,

Does Welectron still give the 5% discount for members of the Eevblog forum?

Diabolo

josip · « **Reply #290 on:** February 07, 2018, 06:59:44 pm »

Quote from: Diabolo on February 05, 2018, 04:36:09 pm

Does Welectron still give the 5% discount for members of the Eevblog forum?

Yes. Anyway, you can try it by welectron web site without buying (checkout), that there is free shipping and 5% discount included.

Diabolo · « **Reply #291 on:** February 07, 2018, 07:13:00 pm »

Ok.

Thanks.
Diabolo

Gandalf_Sr · « **Reply #292 on:** February 08, 2018, 12:24:59 pm »

Hi guys, I'm still alive!

My SDS1202X-E suffers from this problem - I just contacted the service department in Ohio (message form on their web site) asking what I need to do to return unit to them for a replacement motherboard. I live in Michigan so the farthest away it could be is 250 miles - so speed and cost of shipping should not be too much. I do have the tools/skills to repair myself but it would take up too much of my time and raise questions on warranty.

I'll let you know how I get on.

PS, I have been using the scope regularly and I'm generally happy with the performance.

dave356 · « **Reply #293 on:** February 08, 2018, 03:04:54 pm »

I didn't think Siglent was willing to do anything about the compensation problem for USA customers.
My understanding was that they will send you the caps for self repair.

Keep us informed on this, because if they will do a warranty return-repair, I would like to know.

Diabolo · « **Reply #294 on:** February 08, 2018, 06:56:24 pm »

Hello,

Not all buyers send you their SDS1202X-E, few are aware of the problem.
I installed the new firmware, everything is ok.

Regards,
Diabolo

Gandalf_Sr · « **Reply #295 on:** February 10, 2018, 11:53:07 am »

Dave,

Seems you're right, I was offered the capacitors (see email below).

I'm inclined to write back and accept the Caps - I am in a position to fix this myself but the time taken will be annoying. The consumer protection regulations in the USA are pathetic. OTOH, this is clearly a faulty build and they should do better than this, if Ford missed parts off your vehicle which affected its performance, would you be happy with "we'll send you the parts to fit yourself but if you mess it up, you'll void your warranty"?

This is disappointing Siglent.

email from Siglent ====================================

Hi Ted,

My name is Scott Rocco and I am an Applications Engineer at Siglent Technologies North America. Thank you for writing in. We are familiar with the probe compensation issue. All of the SDS1000X-E products are in specification. There is no specification for “probe compensation flatness” between ranges. When you change ranges, the physical circuit is altered and the design/part tolerances dictate the performance. The probe compensation can be adjusted to minimize the effect.

Your serial number SDS1EBAX1RXXXX has a very slight dip in the beginning portion of the flat top of low frequency square waves (similar to the probe compensation signal). We are willing to send you 2 capacitors with instructions to make the changes yourself.

If we send you the capacitors we are authorizing you to open the scope and solder 2 capacitors in place on the mainboard. This authorization puts the full responsibility for the update on you the customer. If you damage the mainboard while soldering or something else happens electrostatically while you are doing the update due to misuse the warranty will be voided. Our warranty at Siglent Technologies America is 3 years on parts and labor unless product is damaged due to misuse.

If you have any other questions you can let me know.

Regards,
Scott

Applications Engineer
SIGLENT Technologies America, Inc

Gandalf_Sr · « **Reply #296 on:** February 10, 2018, 12:20:51 pm »

email to Siglent USA....

Scott,

Thanks for the email.

I think it's unreasonable for Siglent to claim that it's somehow OK to have to re-compensate the probe when changing from one Y range to another - e.g. changing from 1 volt to 2 volts per division because there is "no specification for “probe compensation flatness” between ranges"; I own several scopes and this is the only one that has that 'feature'. The de-facto performance for all scopes I've ever used is to set the probe compensation up using the provided calibration signal and then be able to adjust the other X or Y controls without any need to perform probe compensation again. It's like Ford claiming that it's reasonable that I have to re-tune my car engine every time I shift gear because the specification for my car doesn't say that I can expect the engine to run properly after a gear shift because a gear shift alters the physical way that the engine is connected to the wheels and load on the engine has changed.

The right thing to do would be to repair my 8-month old product for free; in Europe, I believe that it what Siglent are doing.

If you are unwilling or unable to offer a free return and repair, then I will take you up on the offer of the capacitors and instructions. My address is:

nnnn xxxxx yyyyy
zzzz hhh 12345

Sincerely,

Ted

VaZso · « **Reply #297 on:** February 10, 2018, 01:37:26 pm »

Hello,

In Europe, I also had to solder these capacitors myself.
Siglent sent me some capacitors and warranty sticker in a fast way.

As far as I know, they only sent capacitors to everyone who requested, but Siglent itself did not repair any of the scopes, not even in Europe...

Chris-G · « **Reply #298 on:** February 10, 2018, 01:49:22 pm »

Quote from: VaZso on February 10, 2018, 01:37:26 pm

As far as I know, they only sent capacitors to everyone who requested, but Siglent itself did not repair any of the scopes, not even in Europe...

Not strictly true.. In the UK, My SDS1202X-E had its main board replaced free of charge including free carriage. I even had the option of the distributor replacing the main board, or for them to add the capacitors to the existing board. Either way, the warranty would be totally intact. I opted for the new board.

Gandalf_Sr · « **Reply #299 on:** February 10, 2018, 02:33:37 pm »

My preference would be for a new PCB. In the UK they have strong consumer protection which states that new goods sold must be of "merchantable quality", at the very minimum this says that the item must do what it was bought for - it's very disappointing that Siglent claim there is "no specification [claimed by Siglent] for “probe compensation flatness” between ranges"; that is pure BS IMHO.

In theory I could sue but that's not practical as it would cost 20x the cost of the scope and I would have no guarantee of success; it certainly will make me think twice before buying Siglent again.


EEVblog Main Site	EEVblog on Youtube	EEVblog on Twitter	EEVblog on Facebook	EEVblog on Odysee

Author Topic: Siglent SDS1202X-E compensation issue (and other manufacturers ?) (Read 131929 times)

Share me