Siglent SDS1202X-E compensation issue (and other manufacturers ?)

[mr.fabe]

@ tautech , do you know from what serial number off. ?

Units with BB in the build code that is part of the full SN# are from HW revision to remedy the input compensation issue. At this time there has been ~3 weeks production since changes were made.

Hello,

I understand that this affects units with BB in the serial number.  I'm not too clear if the previous units are affected as well.  I have a unit with HW Rev 00-01 (purchased Aug 2017) with serial # SDS1EBAX1Rxxxx and wondered if the issue affects me as well.

Thank you

According to my documentation, yes. It is more noticeable in some units than others.

Carefully compensate the probes at 1V/div the switch to 2V/div and you can see how much the issue will affect your usage. Then decide if you can live with it or not. Contact your supplier or Siglent US in Ohio for a remedy if needed.

Thank you very much for your guidance!

Sent from my XT1575 using Tapatalk

[skander36]

I'll think this will do the job .
http://ru.farnell.com/avx/sqcb7m3r9batme-500/cap-rf-hi-q-3-9pf-500v-1210/dp/1301966

SQCB7M
Is it so that M is not NP0
I think A is NPO (COG)

A is not available on Farnell .
Mouser has COG - https://ro.mouser.com/ProductDetail/AVX/12067A3R9CAT2A/?qs=sGAEpiMZZMs0AnBnWHyRQO2a6rsPNabd23hX0c9SvCc%3d

[evgen.05]

Dear Sir, It's trouble to directly send the capacitors to Russia.
And we don't have the official distributor on the Aliexpress.
You can ask the seller to contact with us to discuss how to deal with it.

Or you can try to search this capacitor:
1206CG4R0C500NT?FH? 1206 4pF±0.25pF 50V C0G
It's also available.

Best Regards,
Jie

from the last mail.

[tautech]

Dear Sir, It's trouble to directly send the capacitors to Russia.
And we don't have the official distributor on the Aliexpress.
You can ask the seller to contact with us to discuss how to deal with it.

Or you can try to search this capacitor:
1206CG4R0C500NT?FH? 1206 4pF±0.25pF 50V C0G
It's also available.

Best Regards,
Jie

from the last mail.

WARNING
Fatal misprint.

Correction:
1206CG4R0C500NT?FH? 1206 4pF±0.25pF 500V C0G

[rf-loop]

Dear Sir, It's trouble to directly send the capacitors to Russia.
And we don't have the official distributor on the Aliexpress.
You can ask the seller to contact with us to discuss how to deal with it.

Or you can try to search this capacitor:
1206CG4R0C500NT?FH? 1206 4pF±0.25pF 50V C0G
It's also available.

Best Regards,
Jie

from the last mail.

Oh my 
What a mess.
Previously Siglent give list about recommended parts. Now they tell it is 50V.
Then they tell they can not send normal letter to Russia. Every person where ever in world can send letter and even post card to Russia. 2-3 small capacitors can send just in normal letter without anything else. Just like normal hello my darling letter.
----------------------------------------------------------------

Open public letter to Siglent

Siglent! 

Is it really wise to make this case unwise. Using brains is free for everyone. It do not cost anything. But making this like it is going on now may now cost lot of Siglent reputation and this is really expensive.
This kind of handling this kind of trivial simple things is total shame. You loose your faces doing it like this!

Sending normal letter, just like cheap private letter is not even difficult.

I can teach how to do it if it is not teached in chinese childrens basic school how to send normal letter. But I can tell, this can not send using WeChat or SMS.  This need physical ancient paper letter what have worked last hundreds of years.

1. Go to store and buy normal A6 size letter envelope.
2. Write receiver name and address on the letter front side.  Also write small size sender name and address to letter left top corner.
(and sidenote, you can send it to Russia, Ukraine, Zimbabwe, North-Korea, USA, England, New Zeland, Israel, Trinidadf, or what ever coutry, even Greenland or Rocky Mountains, to where ever. Global Postal network goes to nearly everywhere. Also you can send letter from Shenzhen to Beijing.
3. Attach the paid stamp to the top right of the letter.
4. Write small "hello my friend, our apologies" and rework and adjustment instructions paper.
5. Attach  3-4 these capacitors using adhesive tape on this paper.
    -  2 for use and 1 - 2 for spare if damaged due to home made rework your made error in scope.
6. Close letter envelope.
7. Take it to the post office.

Difficult? Really?
Start it today or better if you have done it yesterday!

Please do not make simple things complicated and difficult.

Kind regards

[evgen.05]

Then they tell they can not send normal letter to Russia. Every person where ever in world can send letter and even post card to Russia. 2-3 small capacitors can send just in normal letter without anything else. Just like normal hello my darling letter.

as we found, send usual letter to Russia or Ukraine is a huge problem for Siglent. I can pay for the shipment if for Siglent it's too expencive
I understand if need to send mainboard or power supply. But two small capacitors, which price is 0.0 It's ridiculous

[Muttley Snickers]

Dear Sir, It's trouble to directly send the capacitors to Russia.
And we don't have the official distributor on the Aliexpress.
You can ask the seller to contact with us to discuss how to deal with it...............

This entire affair sounds rather strange and in particular Siglents response to your request for assistance, I get the impression that they are not keen to provide warranty support on a product which was not purchased through one of their authorised agents and they wouldn't be the first company to take this stance either.

It's those shifty online dealers who are to blame when they state in the listings "3 year factory warranty", they are happy to sell the stuff but when there is a problem they wipe their hands of all responsibility, what I still don't understand is that they are able to purchase stock from somewhere and I still believe the company plays both sides, it is the recognised dealers who do provide support that get the short end.

Anyway, as rf-loop mentioned earlier it shouldn't be that big of a deal for Siglent to post out the capacitors and realistically it would do their reputation some good,  Christ almighty being Christmas and all they could probably even get away with writing "gift" on the envelope as everybody else does.

[evgen.05]

After this message, Siglent stoped responding on my questions. Great support. I can't ever thought that Siglent is a shit-company.
Once upon a time I bought a Fractal Design case for my computer. After 18 month audio jack on front panel was broke. Wrote to FD support a message, sent serial number and across couple of weeks get new front panel with jack, wires.IS FREE. It cost them about 30 Euro. Just serial number, home adress and the problem description. Doesn't matter that FD has no official distributor in Russia. From Sweden they send need part cost 30 Euro. Siglent lost the face. It's a shame.

[Diabolo]

Hello,

Does the soldering of the 2 capacities of 3.9pf definitely solve the problem of compensation?
----
Siglent may be cautious with people who commit to open the SDS, install and solder the 2 capacities of 3.9 pf.
Siglent may not want to be returned under warranty due to improper handling.

Like me, send a request to Siglent with the serial # of your SDS 1202X-E, phone number and mailing address, and there should not be a problem, I think.

And if you hurt the disassembly operation of the SDS and welding the 2 capacities of 3.9pf, Siglent will remember.

An agent Siglent USA, or Europe, or even a friendly member of this forum, etc ... could provide these 2 capabilities at a fair price.

Regards,
Diabolo

[tautech]

After this message, Siglent stopped responding on my questions. Great support. I can't ever thought that Siglent is a shit-company.

Please be patient, a solution for you will be found.
Not all Siglent staff can make decisions and these things need be discussed between different departments and the factory and they are sometimes not in the same timezone.

Caps they sent me came in a FeDex pack, the cost of which I shudder to think, it would've been much cheaper in a plain envelope. I some years I have always received small items from Siglent in FeDex or DHL packaging but for the shipping of items as small and inexpensive as 2 or 3 4pF caps there need be a better/cheaper and faster way.

The longer Siglent delay sending caps by ordinary mail the greater risk of them being delayed in the normal Xmas rush of mail.
We can still all continue to use the DSO and for almost all work the compensation issue has zero effect on normal usage until good solutions are found to ship/post caps worldwide.

Does the soldering of the 2 capacities of 3.9pf definitely solve the problem of compensation?

Yes, after the input stage trimmers are adjusted exactly as the rework doc describes.

[evgen.05]

Please be patient, a solution for you will be found.

I want be think so. But Siglent told me all that they wanted. They are not be responsible for my scope. They will slove this problem anywhere but not in Russia or Ukraine.

[tautech]

Please be patient, a solution for you will be found.

I want be think so. But Siglent told me all that they wanted. They are not be responsible for my scope. They will slove this problem anywhere but not in Russia or Ukraine.

This forum in some way will ensure you get satisfaction, just continue to use the scope and there will be a solution.

[firstcolle]

the new 1104X-e also have this issue? or it was addressed before the release?

[rf-loop]

the new 1104X-e also have this issue? or it was addressed before the release?

No it do not have. (This capacitor what is missing from 2 channel models is in its place in 4 channel models. This difference in front end can see also in Dave's tear down video.
Also 2 channel models input specifications are bit different. 4 chan models nominal input impedance is bit different in data sheet.

[Welectron]

After this message, Siglent stoped responding on my questions. Great support. I can't ever thought that Siglent is a shit-company.

As an official Siglent reseller, we do not want you to draw this conclusion about a brand that builds great products, regardless where you bought the item.

Please contact me via PN, we will take care of your issue and make sure you get the capacitors delivered for free.

Regards,
Marco

[firstcolle]

the new 1104X-e also have this issue? or it was addressed before the release?

No it do not have. (This capacitor what is missing from 2 channel models is in its place in 4 channel models. This difference in front end can see also in Dave's tear down video.
Also 2 channel models input specifications are bit different. 4 chan models nominal input impedance is bit different in data sheet.

thanks!! noticed now that I re-watched the video!!

[Diabolo]

Hello Welectron,

I note the address of your site, and as you offer free shipping throughout Europe, it's good.
On my side I'm waiting for the 2 capacitors 3.9pf that Siglent Europe must provide me to upgrade my SDS 1204X-E.

Regards,
Diabolo

[mr.fabe]

An update on communication I received from Siglent..

I contacted Siglent USA in Ohio and was basically given the "Return unit to seller for replacement or refund" if I'm not happy with the unit.  In addition, the applications engineer who responded to me stated that "there is no specification for 'probe compensation flatness' between ranges" and there will be no option for repair by Siglent USA.  Unfortunately, I am beyond the return period for my unit and although this compensation problem is an issue that has been adjusted on the current production of units, be aware that you will not have any support from Siglent in Ohio to remedy this problem.  Check your serial numbers and if they fall into the affected ranges, return or exchange immediately or you will be unsupported as I have found from Siglent.  Sad to learn that the company does not really stand behind their products.  Anyone who is considering their products should look elsewhere unless you have good support from the distributor you purchase your products from.  That makes a difference.

[Luap2]

Thanks for the info.  to bad they have that attitude, was going only  to ask for the repair parts

[mr.fabe]

Thanks for the info.  to bad they have that attitude, was going only  to ask for the repair parts

I would still ask them for the caps if you were going to fix it yourself. Nothing to lose. Siglent may agree to send you the caps  and tell you later that your so called "3 Year Warranty" is now void... 

Sent from my XT1575 using Tapatalk

[mr.fabe]

Update #2

Siglent USA will not repair, replace, or provide parts required to address the "compensation issue".  They acknowledge the issue but do not feel the "problem" is a serious one warranting any repair by them.

After several emails, I was offered a refund on my 1202X-E if I am still not satisfied with the product.  That is a pretty generous return option IMHO.

This was my first encounter with Siglent and based on my recent experience, they show that they do care about their customer base.

[StillTrying]

Siglent USA will not repair, replace, or provide parts required to address the "compensation issue".  They acknowledge the issue but do not feel the "problem" is a serious one warranting any repair by them.

We don't care if our DSOs can't display a square wave as square.   

[evgen.05]

After this message, Siglent stoped responding on my questions. Great support. I can't ever thought that Siglent is a shit-company.

As an official Siglent reseller, we do not want you to draw this conclusion about a brand that builds great products, regardless where you bought the item.

Please contact me via PN, we will take care of your issue and make sure you get the capacitors delivered for free.

Regards,
Marco

Ok. Yesterday wrote two messages. Did You received them?

[Welectron]

Ok. Yesterday wrote two messages. Did You received them?

Received and replied.

[Mr. Scram]

Update #2

Siglent USA will not repair, replace, or provide parts required to address the "compensation issue".  They acknowledge the issue but do not feel the "problem" is a serious one warranting any repair by them.

After several emails, I was offered a refund on my 1202X-E if I am still not satisfied with the product.  That is a pretty generous return option IMHO.

This was my first encounter with Siglent and based on my recent experience, they show that they do care about their customer base.

Isn't offering a refund basically the same as offering a replacement? Refund, wait until the problem is fixed in production units, buy again. Assuming you'd want to.