New Hantek DSO2X1X models?

[morgan_flint]

Friends, does anyone know the purpose of the TR line of the power supply?

Probably Trigger Reference to mains, what most brands call a Line Trigger.

It's precisely that, it shouldn't be necessary if not using line trigger.

But a user has reported problems in the boot procedure when this signal is absent, but I tried shorting it to GND (no problems, there are high-value resistors upstream) and the scope booted without problems.

As you can see in the schematics, the TR signal is not only connected to the triggering circuitry but also to the FPGA, as you can see here and here. That may explain cristy's problems but, as I said, I didn't see anything strange in my case.

In the worst case, that signal can be recreated by a 50-60 Hz oscillator (555 or similar) for battery operation but I see in your experiment you didn't need it to boot the scope

[masta_k74]

That looks good. Can you tell me which diodes you used? Do they have to be 100V - Shottky - diodes? To me, 100V reverse voltage seems very high with 7.5V output voltage. I have several shottky diodes here, but all with a lower reverse voltage.
I would have to order them first, which is not worth the shipping costs.
Temperatures of >90°C at room temperature and opened device after a few minutes seems too high to me. In summer and when the unit is closed, it is probably much higher. 

[Russ3000]

I used MBR10100 diodes in the TO220 package, which I had in stock, probably others in a similar package can be used to dissipate more heat and not heat the board. I hung a small radiator on the D5, now no place is heated more than 50°C. I believe that any Schottky diodes from 30V and a current of 3A in the TO220 package will do.

[Dezmond2]

I used MBR10100 diodes in the TO220 package, which I had in stock, probably others in a similar package can be used to dissipate more heat and not heat the board. I hung a small radiator on the D5, now no place is heated more than 50°C. I believe that any Schottky diodes from 30V and a current of 3A in the TO220 package will do.

+1 i did it too with 58 max temp.

[masta_k74]

I think I will equip the oscilloscope with a linear power supply for the analogue part. Whether I will then have less interference on the signals or not remains to be seen.
I'm planning a 30VA, 2x 12Vac toroidal transformer, bridge rectifier and +-8V fixed voltage regulator, so one 7808 and 7908 each.
I will generate the 5V needed for the digital part with a buck converter, which I will supply directly from the first electrolytic capacitor after the rectifier via an LC filter. The TR output that is still needed I want to build 1 to 1 according to the original circuit diagram.
My main concern is reliability, so if the noise level drops, I would of course like that.
In addition, the much heavier weight would make the unit more stable, as it constantly slips when I even touch the mains cable or press a button.
The original power supply doesn't seem to be the most reliable to me, apart from the fact that the cheap Chinese power supplies usually don't last very long anyway.

[Russ3000]

The alteration of the power supply does not provide noticeable advantages in terms of noise relative to the original power supply modified by me, but it will allow galvanically decoupling the device from the mains. Enough 1 transformer with separate windings ~ 2x9V and ~ 12V. To power the analog part, a diode bridge and two capacitors 2200 μF 16V are sufficient, stabilizers 7805 and 7905 are installed on the board and additional stabilization is not required. You can supply voltage rectified and smoothed by capacitors from 2x9V to 2x18V. I powered the digital part from the power bank through the USB connector. Current 1A at 5V and 0.13A at ± 9V. The transformer is better to take R-CORE, it has less capacitance between the primary and secondary windings.
Currently, I limit the power completely to batteries.
Good luck!

[DavidAlfa]

As we all know, BMP format wastes a lot of space.
Everytime I wanted to share a picture I had to convert it manually - got really tired of it!
So I cross-compiled bmp2png. Required some fighting but after a while I got it running.

Then I made a new mod package: bmp2png.
It automatically finds and converts any screenshots.
Original files are deleted after conversion, new ones only take 12KB, finally in a proper format ready to be uploaded anywhere.
Just wait 5 seconds after the "saving" screen goes out to ensure the file was converted.

[Russ3000]

Everything works great
Waiting for screen recording

[DavidAlfa]

Do you mean this? 

[Russ3000]

 
Is it possible to do so?

And watch movies from a flash drive

[DavidAlfa]

Not in practical ways.

[Dezmond2]

Do you mean this? 

Rigol can this? 

[warham]

link is dead at the moment

[DavidAlfa]

Which link? 

[Dezmond2]

Which link? 

Starlink 

[DavidAlfa]

New official release: 2022.11.14.
Bt it's actually the same as the current 2022.10.28.

[dirtmover]

Now that's funny . I guess releasing the same load multiple times fits well with their strategy of refusing to publish any release notes. 

[Algoma]

There is a support reply on Hantek's forum that notes one item that was fixed. About a wavegen period problem. About as close to a realease note as any they've given so far.

https://www.eediscuss.com/forum.php?mod=viewthread&tid=17260&extra=page%3D1

[MarkyM]

I just bought a DSO2D15 and the USB ports don't work. I tried to do the USB Fix update but the USB stick won't stay connected long enough for it to see the update file.
I just need this for audio work. Testing stereo amplifiers etc. When I return it to Amazon, what do you guys recommend instead around the same price point?
I'd like to have the frequency, RMS and pk-pk value displayed on the screen like this one can at the bottom. A math function to calculate power in watts at 8 Ohms from the RMS voltage in realtime and a good x/y Lissajous mode would be nice too 
Here's the versions it came with:
https://photos.smugmug.com/Hobbies/Audio/i-cDpRHmz/0/c54a99d6/X3/20221115_070357-X3.jpg
And a short video of what it's doing when I insert the USB stick:
https://mmanolio.smugmug.com/Hobbies/Audio/i-JdxGgTJ/A
Thank you!
--Mark--

[DavidAlfa]

Is it in FAT32 format? It does that when formatted as ntfs/exfat etc.

[MarkyM]

Is it in FAT32 format? It does that when formatted as ntfs/exfat etc.

I think so but I'll double-check. The computer won't connect to the rear port either. The app and the drivers are installed.
From what I've read on here about these, I think I'm going to return it anyway.
Any suggestions for a better quality replacement for similar or not too much more money?

[BillyO]

Any suggestions for a better quality replacement for similar or not too much more money?

The Siglent SDS1202X-E is going for $339.  !0x the scope keeping quality and usability in mind, but it does not have the FG built in.

These little Hanteks have very little to compare to them if you look at teh specs and the price.  It's just a real shame they are such little dogs.  In reality the only thing they have going for them is DavidAlfa.  Hantek should be paying him a handsome salary.  If it weren't for his efforts they'd get all their junk back.

[MarkyM]

Any suggestions for a better quality replacement for similar or not too much more money?

The Siglent SDS1202X-E is going for $339.  !0x the scope keeping quality and usability in mind, but it does not have the FG built in.

These little Hanteks have very little to compare to them if you look at teh specs and the price.  It's just a real shame they are such little dogs.  In reality the only thing they have going for them is DavidAlfa.  Hantek should be paying him a handsome salary.  If it weren't for his efforts they'd get all their junk back.

Thank you Bill. That Siglent is currently on sale for $287.10 on Amazon! I can do without the built-in generator although that was convenient.
Agreed!!

[BillyO]

That Siglent is currently on sale for $287.10 on Amazon!

Wow, that's amazing!

[Russ3000]

That Siglent is currently on sale for $287.10 on Amazon!

Wow, that's amazing!

You can run DOOM on it?