FNIRSI-1013D "100MHz" tablet oscilloscope

[jayjr1105]

Maybe the Owon or Hantek $100 ish dollar ones?

[Atlan]

Sorry All - Oh wow the issue has now gone.. However just thinking the 1013D scope battery has been recharged since i sore the issue .. Just posted my Calibration results  & a -3 DC Volts now working on CH1 .. I Made a video but will not got into forum using format, Thanks again.

Video upload to youtube.

Please run, base calibration procedure. 860 is default value. Is better add switch supply for powered 1013 see manual for firmware.

[pcprogrammer]

Maybe the Owon or Hantek $100 ish dollar ones?

The Hantek DSO2C10 (up to DSO2D15) is a far better scope than the 1013D, but is also has its problems, like all these cheaper ones. I have no experience with Owon scopes. You better ask this question in a new thread with a bit more information on what it is you need to measure. Like specific voltage levels, at which frequencies, etc. Maybe mention specific models you are looking at, to get the user experience from others here on the forum.

The 1013D and 1014D of FNIRSI, YAPOOK, etc. are both bottom of the barrel performance and hardware wise, so only for the very low end user they may have some value.

I bought one because it looked nice and the specs are not bad, until you find out that they are false. Not 100MHz bandwidth but ~30MHz. Not 1GSa/s but 200MSa/s. Only 4KB sample memory per channel which is not even fully used. Lots of bugs in the original firmware. The 1014D was gifted to me.

Had fun reverse engineering them and got my moneys worth from that, but have not used them for real measurements.

Did use the Hantek DSO2D10 I own though, and it works ok. For the more sophisticated stuff I own a couple of better scopes. 

[Russell2024UK]

As per my previous test using my Owon scope XDS2102A ( 100 mhz 12 bit ) against Fnirsi 1013D it was commented it's not a like for like test using Firmware V0.025h .  Find my other Owon scope DS5032E ( 30Mhz) & test pictures .. Note the Original 1013D firmware matches my DS5032E at 20 Mhz signal input..  The firmware V0.025h does not & looks awful.. To be honest the 1013D is limited to say approx 20Mhz anyway..  Is it possible the new firmware could match Owon ( 30Mhz scope ) &  Original 1013D firmware signal view not as it is now please ?

[Atlan]

You have fnirsi software for nice pictures.  One period of the sine wave on your picture consists of 12 points.  How do you want to reconstruct the signal?

[Russell2024UK]

Sorry i should have said all my pictures were taken via my mobile phone then cropped to suit site.  Unsure of how many points !! Would you know what the original Fnirsi 1013D regards points at the frequency of 20Mhz ? With my 1013D using Firmware V0.025h it looks nice & measurements are good at lower Frequencies from my testing. when you start going above 2Mhz Approx is looks not great measurements seem ok .. I have also measured a DC voltage 12.1 DC Voltage from my PSU & attached my Digital meter for ref and the 1013D scope via DC showing GOOD accuracy. I checked a few more measurements of DC  across both channels very good results for a little inexpensive scope using Firmware V0.025h . Thank you ALL for your hard work the 1013D is in good place now thank you for that.   

[pcprogrammer]

You have fnirsi software for nice pictures.  One period of the sine wave on your picture consists of 12 points.  How do you want to reconstruct the signal?

It is possible with sin(x)/x interpolation but that needs more code written for the scope. Not something I'm considering at the moment. Maybe one day when other projects have dried up and I fancy a dive into mathematics. 

Would you know what the original Fnirsi 1013D regards points at the frequency of 20Mhz

The FNIRSI uses a lot of averaging and special filtering to reconstruct the signal, making it slow and less representing the actual signal. Yes the new firmware starts to loose its looks above maybe the 2MHz, but that is due to the fact that it has less and less points available to draw the signal and you get more straight lines on the screen.

Even your owon 12 bit scope showes some stair casing at 22MHz. Keep in mind that it is digital showing the signal with discrete steps in both directions. (Voltage and time)

[Russell2024UK]

Atlan No worries thanks anyway much a appreciated . I will use the original FNIRSI firmware when i test anything above 2MHZ .... If anything Changes your side or if i can help with any of the above testing just let me know any time  ? 

[Russell2024UK]

Hi pcprogrammer thanks for the good detail now Understand more  . I am a recent user of EEVblog which has helped me with my 1013D upgrades - Like with with my two Owon scopes pictures supplied in the thread even on my 30Mhz scope It would be nice the match ( Screen Views) for above 2mhz up to say 20mhz views in coming updates of the 1013D. The little 1013D is super for now for the cost in my opinion.

[Atlan]

PC: The fnirsi code does not contain sin(x)/x interpolation?

Maybe I was on to something with the DC shift.

[pcprogrammer]

PC: The fnirsi code does not contain sin(x)/x interpolation?

Nope, just linear interpolation.

[Russell2024UK]

From this Forum thread I carried out below  .. Today i fitted the RTC DS3231 module to my  FNIRSI 1013D oscilloscope and it's working well!  The RTC module helps keep accurate time on the oscilloscope, which can be useful for time stamping. the clock feature is working well when using the "Save Pic" and "Save Wave" icons. It seems like the modification is providing me an improved experience, particularly for saving and organising data. Ps : thank to all  for your help with this forum 

[Russell2024UK]

Hi Sleo i have got a few micro sd cards that will not work with 1013D Firmware versions 0.025c & 025g & 025h .... However but work fine with version V0.016a .. using your V1.1 loader software & v1.1.1 , Have you had time to make any adjustment to your firmware loader to format the cards to the correct system your happy with ( Partition Type etc) as what ever i do i cant get the cards to work with new firmware versions 025g & 025h  ? when i load V0.025c etc  with the used micro sd cards the cursors dont show up but values do & will not autoset.. But works fine with V0.016a with these micro cards..   Thank you again.   

[Sleo]

Hi Sleo i have got a few micro sd cards that will not work with 1013D Firmware versions 0.025c & 025g & 025h .... However but work fine with version V0.016a .. using your V1.1 loader software & v1.1.1 , Have you had time to make any adjustment to your firmware loader to format the cards to the correct system ...

Just do it with version 1.1.1 :-) Change the hidden sectors value to 8191 or 16383 or whatever (at least 1023), then click Resize. The existing partition table will be overwritten with a new one with a single FAT32 partition. The only other step you need to do is format this partition. Remove the card and insert it again, Windows should prompt you to format, agree.

[Russell2024UK]

Thank you so so much for your help  … Tried all what was suggested exactly the same  ..After many hours of testing on two brand new microsd cards the fault was found to be a Calibration fault .. On my brand new cards I did not input any calibration information.. And now works with Firmware V0.025h.. If I clear my old sd cards of calibration they now load with .025g & 025h ….  WOW that took some finding  .. May be worth just noting if it happens to anyone else ... PS my clock is still working as my past thread.. 

[Atlan]

It was enough to upload a picture of the diagnostic screen, the problem would be visible immediately.

But it should load the default values ​​and work even without calibration.

[Russell2024UK]

Hi Atlan, Thank you for your feedback  . As per your reply , if I encounter any issues again, I will capture the screen using the Menu and USB connection, then click on the large screen on the right until a window pops up. I'll make sure to send over an image of that screen if needed. As I mentioned earlier, I tried various solutions, and finally resolved the issue by removing the calibration from two microSD cards and reloading the versions 0.25 and upwards. It’s working fine now. Will see if my own calibration import is corrupt / damaged .. & Carry out a fresh calibration via your Video starting from 300mv - & DC Shift adjustment. Do you know if there are any new firmware updates expected soon? My current version is V0.25h. Thanks again for all your help.Best regards, Russ

[Atlan]

As far as I know, there is a problem with switching the sampling frequency in single mode.  But no one reported it, it probably works for them.  In theory, some changes are coming because of the dc shift.  It should work, it just needs to be programmed, and someone needs to test it.

[Russell2024UK]

Hi Atlan It sounds like you're busy regarding the Fnirsi 1013D oscilloscope with firmware updates & modifications  , Ps Regarding the RTC DS3231 module was this your idea , it's awesome  proving very useful for saving pictures and waveforms when i recall them ! I would be interested in testing the DC mode or other new features of the 1013D oscilloscope, being led what you would like to be checked, Testing is definitely valuable. As for firmware updates will they be sent out via this forum ? One very tiny thing i have noticed the battery Icon seems to jitter a little ( slight movement within the battery cell icon ) when run from its battery. Also what does New autosetup do Thanks again Russ 

[Russell2024UK]

Working with the Fnirsi 1013D oscilloscope i am encountering an issue with using the FFT function via firmware version .025h. However the original firmware works fine, anyone have any ideas ? Thanks

[pcprogrammer]

Working with the Fnirsi 1013D oscilloscope i am encountering an issue with using the FFT function via firmware version .025h. However the original firmware works fine, anyone have any ideas ? Thanks

If you had read through the thread you would know that it is not implemented in the new firmware.

I know it is a long thread, but there is a lot of information in it about the shortcomings of both the original and the new firmware, but also what has been improved upon, what has been left out and things that Atlan added to make further improvements.

[Russell2024UK]

Superb, That makes sense Thanks for letting me know