FNIRSI-1013D "100MHz" tablet oscilloscope

[rozwell]

Not really. On startup the code is loaded into the DRAM in the MCU, so the only benefit of a faster card could be speeding up the load time, but the hardware is not capable of running super high speed. The card clock tops of on just below 50MHz, and with the stock card mine came with this is the case.

The startup time is also limited by the configuration time of the FPGA, and with the new open source firmware this is already the limiting factor.

Thank you, I suspected that was the case, but wasn't sure
And for a handy little scope it boots pretty fast.

[Russell2024UK]

Hi Atlan  Have you seen the new Oscilloscope FNIRSI® DPOS350P 4-IN-1 350MHz 1GSPS? It functions as a tablet oscilloscope, signal generator, spectrum analyzer, and frequency response analyzer. Would this be a scope you'd consider fitting with a real-time module like the 1013D, since it currently lacks one?  See some pictures attached of the DPOS350P - Thanks Russell

[Atlan]

Whether you know about it or not, there is a problem with the waveform output on the screen with a multiplier of x100 and 5V/div. The digital voltage calculation is correct, but the graphical display is underestimated.

It should be fixed, I changed the cursors, the lower one is fixed, the upper one is movable.

Since I tried some things on the firmware, I'm not sure if there were any errors that weren't there in 0.026b

[Collin75]

Should we expect inversion of signals in the channel menu?

[Atlan]

Theoretically yes, the question is how many things would such a change affect. At least the automatic setting in DC mode would require changes.

What do you need this for?

[Collin75]

Sometimes it is necessary to flip the spark oscilloscope of the DIS system for convenience or to check the diodes on the X-Y screen. The Vi curve seems to be called.

[mehdifat]

hello everyone.
mr Atlan. i wanted yo upgrade my new 1013d to your alternate firmware. man the default firmware sucks.for example it doesn't even show the voltage when it is low. when at 10x it will not show ripple voltage at 120mv.i think it starts to show at about 400 or 500mv. below that it just shows zero while in realty it sees and detects the voltage.
regarding backup and upgrading i have some questions sir.

i don't have a linux system. is there a way to backup firmware with in windows 10? have i understood correctly that i have to make 2 partitions on the sd card? the first must be 1mb and the second must be the remaining free space?

will it be possible to add peak detect acquisition mode in future update if you had time? i want to measure ripple and noise and peak detect helps a lot.

thank you sir.

[pcprogrammer]

i don't have a linux system. is there a way to backup firmware with in windows 10? have i understood correctly that i have to make 2 partitions on the sd card? the first must be 1mb and the second must be the remaining free space?

To make the backup of your scope you need to load the firmware backup binary in the same way as the new scope software, and there is a Windows GUI based tool to do it. Look through this thread on information on both the Windows tool and the firmware backup steps.

For the SD card, you understood incorrectly. There is only one partition needed on the card, but you have to leave some free space before the start of the partition. 1MB is sufficient for the new firmware.

[mehdifat]

thanks friend i will read the thread to understand windows procedure.
BTW, do you know if there is any chance of peak detect acquisition mode being added in the future?

[Atlan]

How is it supposed to work? What will be the result of the detection?

[mehdifat]

How is it supposed to work? What will be the result of the detection?

hello

from what i understand, in peak detect mode the scope gives priority to highest and lowest points (amplitude) in samples. in this way, with lower sampling rate, we still get the peaks of high frequency pulses and noise. for example, I have attached 2 pics from Owon Vds 1022 Scope measuring ripple of a fake 25w Samsung charger. The time base is set at 500us/div and so the sampling rate is just 500KS/s.

if you kindly look at the pics, in one of them there seems to be some random noise but in the other, there is clearly a high amount of noise detected. This is what peak detect achieves. With the same number of samples per second, it clearly shows the amplitude and amount of noise or high frequency pulses which is not normally achievable (EMI in this case) and at the same time, I can see the low frequency ripple because I can do it with long time base (I can even set the time base to 5 minutes and still see high frequency pulses or noise).
In normal sampling mode, I have to zoom a lot and go to about 10us/div time base so that the sampling rate gets high enough (25MS/s or more) to see high frequency pulse and noise but then, I will not be able to see low frequency ripple and voltage measurements will not be as precise.

Here is also a definition given by one of the oscilloscopes manufactures (SIGLENT) about peak detect mode in it’s scope model SDS2000X. I don’t know how well it conveys the meaning of peak detect but I thought it may be useful:
“Peak: Peak detect mode. The oscilloscope acquires the maximum and
minimum values of the signal within the sample interval so that the
peak (maximum – minimum) in the interval is obtained. This mode is
effective to observe occasional narrow pulses or spurs with a low
sample rate, but the noise displayed is larger. In peak mode, the
oscilloscope will display all pulses with a pulse width longer than
400 ps.”
I am not a professional like you so please forgive me if I couldn’t explain it good enough.

[Atlan]

The FPGA has 3000 samples per signal. 1500 samples are used for display. If we consider that the screen will fit about 750 samples. It would be possible to increase the sampling rate 4x. I don't think it would help. Try it, increase the sampling rate 4x and see if you see something there.

[Russell2024UK]

Hi Altan  Do you offer instructions on how to fit a Mini DS3231 Real-Time Clock (RTC) module for the FNIRSI 1014D oscilloscope, similar to what you provide for the 1013D model ?  Thanks Russell

[pcprogrammer]

Hi Altan  Do you offer instructions on how to fit a Mini DS3231 Real-Time Clock (RTC) module for the FNIRSI 1014D oscilloscope, similar to what you provide for the 1013D model ?  Thanks Russell

And how do you think this will work in the 1014D?

There is open source firmware for it, but far from finished and it does not have the support for the real time clock like in the 1013D open source firmware. So unless someone picks up on the 1014D open source firmware, implements the real time clock support and releases it, there is no use in adding the real time clock module to the 1014D.

I have no plans on continuing with the 1014D open source firmware any time soon. What I made so far is made available on github.

[Russell2024UK]

Hi pcprogrammer  Thank you for letting me know that installing the DS3231 real-time clock in the FNIRSI 1014D wouldn’t be easy—it’s a shame, as I recently bought a new 1014D with version 3, which works well. I also have a few OWON oscilloscopes, which offer great features for the price. For simple tasks, the 1013D with an RTC that I have is superb. Thanks again 

[Atlan]

Added the possibility of channel inversion. (it will not work correctly after pressing AUTO). Press AUTO and only then can you invert the channel. (in AC mode it will work).
Later I will adjust it so that it works correctly in autosetup. Some graphic changes in the chanel menu

I haven't tried it, so I don't even know if it works. v0.026h1

[mehdifat]

dear Pcprogrammer and Atlan.
thank you both for kindly helping us. it is really heartwarming.

dear Atlan, i have been trying to learn how to backup,install and calibrate the firmware.

there have been some steps that i need to understand before installing the firmware to reduce my chance of making a mistake and possibly breaking the device.

when i success in installing the firmware i will try what you suggested. thanks lot for your help my friend.

[Atlan]

NEW Autosetup with inverted channel enabled should work properly. v0.026i
Old autosetup has not been modified.
Test the channel inversion function to see if the autosetup function also works properly.

If that is OK, I will modify OLD autosetup as well.

[Atlan]

Sometimes it is necessary to flip the spark oscilloscope of the DIS system for convenience or to check the diodes on the X-Y screen. The Vi curve seems to be called.

Can you upload some pictures from such a measurement on 1013D, thank you

[Atlan]

Nothing major, I'll see if you notice the change. v0.026j

[Russell2024UK]

Hi Atlan  with this new firmware V0.026j what will it offer us ?  thanks again

[Atlan]

Try it, and maybe you'll figure out what's changed.

[Russell2024UK]

Atlan thanks    will do 

[engineer.r152]

Hi Atlan! What functionality is planned for the Hold on button in the trigger menu?

[Atlan]

This should set the delay between two triggers.