FNIRSI-1013D "100MHz" tablet oscilloscope

[Atlan]

Without a picture of the diagnostic screen, it won't help me at all.

Always provide a picture or video with the problem where the parameters of the oscilloscope are visible, and a picture of the diagnostic screen with the values.

[Atlan]

Hello, I hope everyone is well!

Sorry for any spelling mistakes, I'm using a translator!

Today I ventured to change the 1013D's firmware. I changed the SD card, and imported the firmware through "Loader". All very well. At this moment, I have firmware v0.024f, recently posted.
I was testing other firmware versions, and they all had this ripple, and this small imperfection in the square wave (images attached). I tried to do the calibration in the menu, and nothing changed. The original firmware fixes this.

What could I be doing wrong? Is there any procedure to be done besides updating the firmware? How do I calibrate this?

Thank you all, and congratulations on the project! The new firmwares greatly improve the equipment’s functionality!

The program displays the signal as it is. Instead of improving the hardware, Cinan did magic with the signal to make it look good.

No problem. Sit at the PC, there is a diagram, the layout of the components. They crossed it, removed the errors that are there from the power supply to the signal line between the FPGA and the AD converter. Ideally, a new program for FPGA. When will you probably have it done?

But for your good feeling, it is planned to add a moving average.

[Magua]

CH-1, CH-2
Calibrate it again?

[Magua]

CH-1, CH-2

[Atlan]

Press autoset, without a connected signal. Did it help?

[Magua]

The new calibration helped,,, thank you!

[bpeletronica]

I was testing other firmware versions, and they all had this ripple, and this small imperfection in the square wave (images attached). I tried to do the calibration in the menu, and nothing changed. The original firmware fixes this.

1) It appears you have not done proper voltage calibration. All your defaults are ending in 00000. You must provide a stable voltage in 0V3, 0V6, 1V5, 3V0, 7V5 and 15V0 levels when re-calibrating those levels

Atlan's Calibration post with video example: https://www.eevblog.com/forum/testgear/fnirsi-1013d-100mhz-tablet-oscilloscope/msg5279620/#msg5279620

2) The new firmware shows actual level readings, what you are calling jitter. The original firmware averaged those out giving a fake display that did not represent the actual levels. 

I posted about that way earlier in the thread, here is that post and the response from others regarding that:
My Post: https://www.eevblog.com/forum/testgear/fnirsi-1013d-100mhz-tablet-oscilloscope/msg4573744/#msg4573744
PCProgrammer's Reply: https://www.eevblog.com/forum/testgear/fnirsi-1013d-100mhz-tablet-oscilloscope/msg4574389/#msg4574389

Hello!

Before, the CH1 & CH2 calibration did not appear for me.
I installed the stock firmware on the osciloscope, and upgraded it to v0.024f.
Now the CH1 & CH2 calibration appears!
I will calibrate it soon, and return with results!

Thanks a lot for the help!

[bpeletronica]

Calibration performed using a regulated power supply.
Everything perfect!

Thanks very much!

[Atlan]

Auto set in AC mode set offset to zero.

[Atlan]

Does anyone use current probes?  What?  With what parameters.

[engineer.r152]

Yes, I use it. Parameters 100 mV per 1 A and 10 mV per 1 A

[Atlan]

The plan is to add an Average button and a long/short mode switch to the ACQ menu.  Added option to display data in mA and A if a current probe is used.  Adding a sun icon to toggle between maximum and set brightness.  (does anyone need it?)

If possible, a software trigger for short mod will be added.  Allows the use of the entire memory of 3000 samples.  Suitable for tracking communications.  Now the trigger is always in the middle of the memory, which means that only 1500 samples are available for the signal.

Generator sine square triangle connected to SPI, I will place the BNC connector next to the switch.  It totally fits in there.  I am considering whether to equip it with an amplifier regulated via i2c.

Can you think of anything else?

[engineer.r152]

is it possible to scroll the signal using the slider at the bottom of the screen?

[Atlan]

Not, but it was planned.  It's not that simple

[engineer.r152]

It's a pity, but everything is working out so well!

[lamazoid]

The plan is to add an Average button and a long/short mode switch to the ACQ menu.  Added option to display data in mA and A if a current probe is used.  Adding a sun icon to toggle between maximum and set brightness.  (does anyone need it?)

If possible, a software trigger for short mod will be added.  Allows the use of the entire memory of 3000 samples.  Suitable for tracking communications.  Now the trigger is always in the middle of the memory, which means that only 1500 samples are available for the signal.

Generator sine square triangle connected to SPI, I will place the BNC connector next to the switch.  It totally fits in there.  I am considering whether to equip it with an amplifier regulated via i2c.

Can you think of anything else?

adding more probe divider options, like 50x, 100x, 1000x (bench scopes usually have those)
this is very useful when working with high voltage probes.

[Atlan]

I tried to load the backup firmware via the loader, and it didn't work, the original software still started. What could be the problem? I uploaded a backup bin in linux. The backup software started, I copied the files from the sd card and immediately tried to load the oscilloscope's FW, it didn't work, the relay clicked and the screen remained black. I used the loader under Windows and loaded the firmware there, the oscilloscope turned on. What is it? (wi11 wanted something regarding the restart to install updates)

[pcprogrammer]

No idea about the loader on windows, but on linux you do need to unmount the partition before using dd to load something to the SD card. Maybe you forgot that between the copying of the backup files and the loading of the firmware.

[Atlan]

Since I used bin for backup, after using make, it probably just inserted a new code into the backup BIN. by deleting the scope bin, replacing it with a functional scope bin, it works already after using make. at least I hope so, because I fixed the mistake. so hopefully it will work after all.

DC mode. When measuring a signal with a DC shift. For example, 5V PWM from uP, does not display frequency, duty and time.
Fixed in firmware 0.024i

Tokar, can you check if this update also made autoset faster? for signals with a DC shift?

Now I remembered that there are unfinished things in channel switching. That's how it is when it is done on two things at once.

[engineer.r152]

In version 0.024i, the sensor does not work on the new V/A, Average, ACC Long buttons

[tokar]

v 0024i. After the reboot, a notification about reset to default and the need to calibrate. The temperature is not displayed correctly.
Conditions: CH1, 1:1, initial range 5V, DC=0-2.5V, AC=0-1V, 200Hz-5kHz.
Autoset speed:
DC mode (DC only) - 8-10 sec.
AC mode (AC only) - 1-2 sec.
DC mode (DC+AC) - 1-2 sec.

[Atlan]

 Yes, because I started working on it, but then I had to do something else.  And I forgot what changes I made in between.  Hidden under A/V is 1x 10x 100x

Tokar: Default settings is RTC off. Switch on, temperature ok

[tokar]

...
Tokar: Default settings is RTC off. Switch on, temperature ok

I'm sorry, I understood about the clock, but I didn't have time to correct the post, you already answered.

[gadak]

Hello, there is a problem on firmware 0.024e, 0.024f, 0.024g channel ch2 the cursor jumps up and can not move it down. At any voltage. Also when using autoset the voltage is actually 9.3 and after pressing autoset it shows 8.6 volts.

[Atlan]

Read red text, uploat picture with calibration data.
Did the basic calibration go without error?