New handheld touch DSO, Fnirsi 2C53P, claimed 50MHz/250MSps (April 2024)

[csuhi17]

I played with it a bit, but I couldn't find the 64K memory, compared to the HDS272s, which only has 8k...

"kByte" is not the same unit as "kpts".

Confusing, but at least they named it correctly this time.
Others write 64k, so you can only guess.

I'm a bit confused by this.

Is 1ps not 1 byte for an 8-bit oscilloscope?
So 64kbyte is not equal to 64k samples?

I no longer know for which scope it was written as 128kBit, I knew that it was only necessary to divide by 8 for that type.

[Aldo22]

I'm a bit confused by this.

Is 1ps not 1 byte for an 8-bit oscilloscope?
So 64kbyte is not equal to 64k samples?

I no longer know for which scope it was written as 128kBit, I knew that it was only necessary to divide by 8 for that type.

You're probably right, I confused it with kBit myself. 
But of course it's still true that it's not the same unit in principle.
You can see that if the scope has more or less than 8bit vertical resolution (or ADC? There is a trap everywhere...)

[pcprogrammer]

I played with it a bit, but I couldn't find the 64K memory, compared to the HDS272s, which only has 8k...

"kByte" is not the same unit as "kpts".

Confusing, but at least they named it correctly this time.
Others write 64k, so you can only guess.

I'm a bit confused by this.

Is 1ps not 1 byte for an 8-bit oscilloscope?
So 64kbyte is not equal to 64k samples?

I no longer know for which scope it was written as 128kBit, I knew that it was only necessary to divide by 8 for that type.

For the 1013D and 1014D it specs 240Kbit which is not even correct since it uses only 4KByte per channel of which only 3Kbyte is effectively used. So of the available 240Kbit in the original FPGA (The Altera one) only 8192 bits are used for storing the samples.

[UniSoft]

MTX2088 ADC

This is Dual Channel 8-bit, 100Msps ADC... (analog AD9288)
datasheet

but can't see the processor. Is it hidden under the shield?

MCU is on bottom side, and it is Synwit SWM34SRET6
datasheet

[pcprogrammer]

MTX2088 ADC

This is Dual Channel 8-bit, 100Msps ADC... (analog AD9288)
datasheet

but can't see the processor. Is it hidden under the shield?

MCU is on bottom side, and it is Synwit SWM34SRET6
datasheet

How did you find the MCU make and model? On csuhi17 his pictures the marks on the chip are removed.

The ADC is most likely the same as used in the 1013D, 1014D and some of the other scopes FNIRSI makes. They can be overclocked but have not tried it myself, because it would require reprogramming the FPGA in the scopes I have. There we assumed it to be the AD9288 or a clone of it, but the markings have been removed, until now in this one where it is still there.

I wonder why they choose the bigger FPGA for this scope, instead of the most likely cheaper ones used in the other scopes.

[UniSoft]

How did you find the MCU make and model? On csuhi17 his pictures the marks on the chip are removed.

Yes, the marks was removed but not complete (not deep enough), and still can see the mark.
drop of alcohol makes the magic

[tunk]

A long and thorough youtube review by ElectroBananas: https://youtu.be/03tuX4vN9GE

Screen dumps from the video:

[DaneLaw]

..........

What's the name of this handheld camera-based magnifying glass?

[tautech]

..........

What's the name of this handheld camera-based magnifying glass?

Gurgle image search finds it on Amazon and AliExpress:
https://www.aliexpress.com/item/1005006652751189.html?gatewayAdapt=4itemAdapt

[DaneLaw]

..........

What's the name of this handheld camera-based magnifying glass?
..

Gurgle image search finds it on Amazon and AliExpress:
https://www.aliexpress.com/item/1005006652751189.html?gatewayAdapt=4itemAdapt

Roger that     thx.

Looks to be quite a span between the offerings, from around 16 to 60 bucks € (incl. EUVAT) with more or less identical hardware  https://www.aliexpress.com/item/1005006741973129.html?
// perhaps there are hardware differences, as some do claim 100x while others 50x - but these x-magnifying ratings on cheap Chinese gadgets are usually as informative as putting your tongue out the window, in the hope of landing the daily news.
Though, It could be handy, such a small self-contained handheld-magnifying lup, if it doesn't drain its battery too fast while in limbo.
- time will tell.. took the plunge on one as it could also be a gift for my elderly mom, who often have issues reading small text.

[tunk]

A video review by Kerry Wong, summed up as: Very disappointing, not recommended.
https://youtu.be/W9v-gkCJYGI

[tunk]

A video review by Learn Electronics Repair, summed up as: Cannot trust what you see on the screen.
https://www.youtu.be/NjtfyVPaW70

[Seekonk]

Anyone tried the 1.7 update yet?

[csuhi17]

Anyone tried the 1.7 update yet?

I tried it, but I didn't notice any significant changes.
Among the compressed files of the update, there is a text file, which describes which errors have been fixed.
I didn't notice any changes on the trigger, it's the same garbage.

[Dave_g8]

Hi,
I see that changes are being made to the FPGA as well as the firmware.
It will be interesting to see if the issues eventually get resolved.

APPV1.7+FPGAV1.5
1. Modify the oscilloscope probe ratio from not saving when powering down to saving when powering down.
2. Fix multimeter curve display bug
3. Modify the conditions for the multimeter’s buzzer to sound
4. Optimized triggering

[Seekonk]

1.7 still doesn't include 100X probe setting.  I was testing some resistors. When I got to the fourth it read infinity. tried everything, had to power down.  On the meter max/min, I got volts for the high and ohms for the low.  Can't see the scope has improved.  AUTO seems to always come up right.  Get too far from that and it is a random image generator.  How did they think it wouldn't be noticed.

[Piton]

Hello. I recently received this device - a complete disappointment. Maybe I got one like this, but it has problems. The problem is with the second channel: noise appears at certain values ​​of the sweep in the middle position of the beam, when the generator is turned on, starting from a frequency of 5-10 MHz and higher, the signal goes directly to the second channel, the higher the frequency, the higher the level of this signal, the frequency meter does not work correctly, you need to turn the channel on and off so that the correct readings appear. Firmware 1.8.? - I don't remember the last digit exactly. It is not on the site, the last one is 1.7. I tried to reflash it - it does not want to, apparently it is not possible to flash it to the previous ones. Opened a dispute, the Chinese guy promised to return $25

[csuhi17]

I think that is very little.
This device is not even worth 50 USD in my opinion.
The first channel of my copy is unusable, the second one is okay, but since it has a lot of bugs, it is lying on my desk like a paperweight.

Not at the bottom of the closet, because it is a good example for me to buy a Fnirsi device only if I have already seen proof that the given device is stable and good.
On youtube, I don't understand why they mislead the masses, respect for the exception, Kerry Wong.
Few people test it normally, and many are obsessed with "Funcation"....

But I think this is just as bad as 1013D/1014D.

I didn't test the bug you brought up because I dropped the whole thing after a quick test of CH1.

Then when a normal update comes out, I'll take it out as soon as possible.

The update consists of two files, there is the APP and the FPGA.
What you find on the site is old, I don't think it will solve your bug, or at least you will generate more bugs with it.
My firmware: APP v1.7, FPGA V1.5

[Piton]

From the external generator everything is more or less normal, it shows the frequency correctly from 20 Hz, but the amplitude is slightly overestimated, and there is a difference in the readings by channels, the second one overestimates more than the first one. Well, there is still a faint hope for a new firmware.

[csuhi17]

Both channels are wrong for me, but CH1 more so.
The error is greater when measuring a higher frequency.
Approximately: CH1=+5%-20% and CH2=+5%-10%
The measurement of the CH1 frequency at a higher frequency is completely wrong, it cannot count.
Curosr and Calculation do not work at the same time.
The BW limit does not work, so if you want to measure the height of a square mark, you have to use a cursor.
There is a phenomenon when you set a time base and the measured voltage increases significantly for one of them. Not always.
Normal or single trigger does not work in the faster time base. Under 2us.
There are many trigger bugs.
I tried to trigger a rare 1Hz and 500us wide pulse with it in a 200us time base, but it didn't work.

There are more, but I can't remember them now.
Have you experienced something similar?

I also hope that they fix it, unlike their previous scopes.

[Piton]

I checked by frequency, both channels measure correctly up to 67 MHz. Single trigger also works up to 2 µS, I couldn't check 1 Hz, my generator gives only 10 ms. If you set 50%, signal distortion appears (ladder), you need to shift the trigger level, 100 pF capacitance shows about 30.