New Hantek DSO2X1X models?

[DavidAlfa]

Sure, the're great scopes out there for USD1...
This scope provided great value for the money even with the bugs... my 2D10 was only $170 incl. shipping.
I hate Hantek as brand, their bugs, their non-existent support, they just fly away.
I'll never buy anything professional from them, but it was a reasonable option for the hobbist.
They cost almost double now, for that price, nope!! That's the price tag of Rigol.

[aztecboy]

I read all these threads before I bought and for the rf ham stuff I do, I've been really happy with it

[rafael_guarana]

Try loading this nude stealer virus setup. Set for 3.3V level, 115.200baud.

Thank you DavidAlfa. I tried your setup. I didn't see any improvements (nor any nudes) My serial adapter outputs 5V but I doubt this makes any difference here.

That decode feature is just not working as it should. If I use your setup without any modification, it complains about no trigger but the scope just trigger as expected  If I set the scope to single sequence, it triggers but now complain that I have to adjust the time base  Of course, adjusting the time base does not change anything.

And to make everything even more weird, the scope triggers perfectly if I ask it to trigger on specific data Somehow it must be able to decode the protocol but that live decoding purple thing (nor the monitor) is able to display any data. I give up.

Hi.

I had the same problem as you. Mine came with software 220210.00 and 3204 firmware.

I had no luck decoding uart or iic.

Fixed it downgrading to the 3202 firmware found on David alfa's Google drive.

[Tomvl]

Hi All,

I’m having the same issue as already discussed on this forum.
Just bought a DSO2D15 and I’m trying to decode a simple “hello World!” – message, sent via an Arduino at 115200 Baud.
Whatever I do with the trigger or the timebase, the Hantek just won’t decode the message.
Just keeps displaying the message “adjust the timebase/trigger.
The scope came with the mote recent firmware 3204/1.0.2.0.0(220210.00)
I’ using the attach setup for trigger and decode.
Also tried to decode IIC messages, this is also not working.
Does anyone have an idea on how to fix this?

Thanks,

Tom

[pcprogrammer]

Hi Tomvl, welcome to the forum.

Did you read the posts down from here? https://www.eevblog.com/forum/testgear/new-hantek-dso2x1x-models/msg4139536/#msg4139536

That is specific about the UART decoding.

The post before yours states that going back to firmware (FPGA programming) 3202 solved the problem for him.

[Tomvl]

Hi,

Thanks for your help!
Downgrading to 3202, did indeed solve the decoding issue.
But now I have the USB issue.
I've read on the forum, that there should be an USB_fix script on the Google drive, but I'm unable to find it.
Any idea how to proceed here?

Thanks,

Tom

[vistorik]

But now I have the USB issue.
I've read on the forum, that there should be an USB_fix script on the Google drive, but I'm unable to find it.
Any idea how to proceed here?

You could find the dso3kb_usb_fix.upk  here: https://drive.google.com/drive/folders/1iw9BOnvxNOd0f_2uvGwGSHmnjP4TrG4f

[Tomvl]

Thanks!
Got it all working now.

Thanks from your help!
Tom,

[Tomvl]

Small update from the support team of Hantek.
Their engineering department is also working on a fix, for the UART decoding issue, in their next code.
See screenshot below.

Gr,

Tom

[rafael_guarana]

The specs of the AWG on http://www.hantek.com/products/detail/17182, says:

DC offset +- 3,5V and amplitude 10mV - 7Vp-p with high impedance output.

I can set a sine wave with 0 Vdc and 7 Vpp, but i can't increase the offset with this anmplitude set. Or, I can set the offset to 3,5Vdc and 0Vpp, but I can't increase the amplitude with this setup.

The question is: Do you get the same limitation?

[pcprogrammer]

Because  it in the hardware is just a 12 bit DAC followed by an opamp without an extra DC offset input, it is just +/- 3.5V full swing that can be output.

The rest is done in software.

The opamp is powered from +5V and -5V so that limits the range. See here for the schematic: https://www.eevblog.com/forum/testgear/hantek-dso2xxx-schematics/msg4270783/#msg4270783

[dirtmover]

My advice: stay far away from these trash. If you need anything more than a toy with a big screen, don't spend neither 1usd on them.

I'm pretty happy with mine so far. Sure, it has it's bugs, idiosyncrasies, limited performance and misleading specs. When I purchased my expectations weren't high. I got a 2C15 and upgraded to 2D15 so I think I easily got what I paid for.

Maybe post some screen shots and let us see your issue.

[dirtmover]

The specs of the AWG on http://www.hantek.com/products/detail/17182, says:

DC offset +- 3,5V and amplitude 10mV - 7Vp-p with high impedance output.

I can set a sine wave with 0 Vdc and 7 Vpp, but i can't increase the offset with this anmplitude set. Or, I can set the offset to 3,5Vdc and 0Vpp, but I can't increase the amplitude with this setup.

The question is: Do you get the same limitation?

Yes, I see the same.

Also:
- if I set the Amplitude to 2V
- then max the offset out at 2.5V
- I can then go back to Amplitude and bump it up to 2.5V but I see clipping/distortion of the waveform
- if I then go back to offset and try to reduce it a touch it jumps back down to 2V and the waveform looks clean again

My conclusion is that the maximum output of the awg including offset should be ±3.5V but the crappy software does not range check and limit it effectively.

Also, no surprise that this limitation to the spec is not properly conveyed in the Hantek documentation.

but it might have been useful, for example, to have been able to generate a 5Vpp square wave with 2.5V offset

I'm not too bothered about this, however, since the AWG is a freebie feature I didn't pay for on my 2C10.

[DavidAlfa]

To me, the zoom bug is really serious and limits the usability (Can't move cursor before trigger), hantek screwed that in early 2021 and never answered in their forum.

[dirtmover]

To me, the zoom bug is really serious and limits the usability (Can't move cursor before trigger), hantek screwed that in early 2021 and never answered in their forum.

Ah, I thought that was an odd choice as well but I've only owned the scope for 3 months, not long enough to have experienced it working properly.

I get the feeling that Hantek are not really engaged in supporting and improving their products. I guess their business model doesn't build in a budget to allow for much ongoing development on a $190 scope!

btw, thanks for putting together some awesome and concise support material and tools.

[vistorik]

See here for the schematic: https://www.eevblog.com/forum/testgear/hantek-dso2xxx-schematics/msg4270783/#msg4270783

I'm sorry pcprogrammer, but I didn't fine a schematic for the power supply?

[pcprogrammer]

See here for the schematic: https://www.eevblog.com/forum/testgear/hantek-dso2xxx-schematics/msg4270783/#msg4270783

I'm sorry pcprogrammer, but I didn't fine a schematic for the power supply?

You are right, I did not make it since it is not to my interest. It is just a switching power supply. I'm interested in the actual scope hardware to understand how it functions and to be able to play with it as a hobby platform.

I'm playing with the idea to reverse engineer the FPGA. There is more open source information available about the Gowin devices than for the Anlogic devices, on which I failed to do so. The information Pepijn de Vos collected about the bitstream already showed me that it is indeed a GW2AR-18 device, and what he wrote about the interconnect routing made me revisit the Anlogic attempt for the FNIRSI-1013D FPGA. It is slow due to other reasons, but made some progress again.

It will not be an easy feat, and might fail altogether, but I'm curious of mind

[morgan_flint]

Here I posted a simplified schematic for the power supply.

I didn't include the details around the main ICs (it wouldn't be too complicated if necessary). Still, it's enough to understand how it works (my main interest was a possible battery conversion).

[.rpv]

Hi forum,

I saw that people was reporting really high temperatures on the power supply, I checked the diodes (D5) and I got 70C (with 26C ambient, after ~30mins without the back part of the enclosure)* , not as much as others have reported (>95C), but still too much.

So decided to change all the diodes on the secondary:


D4 SS310 with STPS6M100SF | slighty better diode.
D5 SS310 with FERD40H100SFP | way better diode.
D6 SS310 with SB1045L | way better diode.

then I install some small heatsinks but they didn't made much of a difference.



so I installed bigger ones.



Finally got this temperatures:

D4 47C*
D5-inner 48C*
D5-outter 47C*
FERD40H100SFP-top 44C*
FERD40H100SFP-heatsink 46C
U1-heatsink 60C
U4-heatsink 62C

at 24C ambient.

*I Just put the thermocouple on top of the plastic package, *probably* not the best way to do it.

Hantek had to used either a fan o better parts.

The DC-DC converter seems hopeless, it's just not good, I mean it uses transistors for the switching... I thinking into replace it with something that uses mosfets, synchronous preferable, with this change U1 may reduce it's temperature a bit.

BTW does anyone knows what type the connector is on the output?




Also, for people that want to change D5, if you're on a 220VAC country, you *probably* should use a 100V part, 60V diode seems risky to use... I always saw that on SMPS they always use high voltage diodes on the secondary and had the doubt if was really needed or another victim of "we are using the cheapest part that'll do the job" thing, so looking for an answer I found an app note from Infineon with all the equations involved on SMPS design, on page 21 (attached) the mention the equation related to the diode voltage:

Vdiode=Vout+(DCpeak*(Ns/Np))

Ns/Np it's the transformer turn-ratio, which we don't know, but the U1 datasheet mentions the ratio 12/90 that *probably* hantek used on the PS, so for the voltages I got the diode ratings:

110/120/127 VAC using infineon turn-ratio example: 38.06V
110/120/127 VAC using DK124 turn-ratio example: 34.34V

220 VAC using infineon turn-ratio example: 60.07V
220 VAC using DK124 turn-ratio example: 53.63V

In countries were we have 110/120/127 VAC we *probably* can use a 60V part I use the 100V part mostly because was the only FERD on full plastic package when made the order.

BTW, on the U1 datasheet they recommend (for a 12V out) a 300V part 

[eevbstedt]

'New' firmware is up:

dso3kb_20220517.upk

http://hantek.com/products/detail/17182
http://hantek.com/uploadpic/hantek/files/20220727/dso3kb_20220517.zip

[DavidAlfa]

Great news! Or maybe not...
I wonder how many working features will this update break

[pu6k1n]

Does anyone have a full nand w25n01g memory dump for dso2d15???

[daf0x]

I applied the heat-sink mod and found that on the other big chip (left of the lemontree part) there was the same black paint typically used on fake chips. I removed it with some alcohol and took some pictures. It looks to have a National Semiconductor logo, but they scratched the part number off. Some bits of it are still readable. Perhaps it can help someone to identify the part:

[pcprogrammer]

Interesting

The going believe is that the chip is a Texas Instruments adc08d500. See: https://www.eevblog.com/forum/testgear/hantek-dso2xxx-schematics/25/#top

Don't know if National Semiconductor has a similar ADC.

The Lemontree chip is a Gowin GW2AR-18-144 FPGA. This has been confirmed based on the bitstream for the FPGA

[DavidAlfa]

Try deeper cleaning it with a brush, then drop some thermal paste, massage it to fully fill the porous surface and wipe gently.
Any marking leftovers will be filled now with the paste and revealed, this works great most of the times.