DSO 2D10 Issue with higher memory depth

masta-k74

My brand new 2D10 shows a strange "interference signal" when the memory depth is set to more than 40k. The interference signal always appears with a time delay after increasing the memory depth and overlays the measurement signal. (Many, very short spikes on the screen) It also appears without any probes connected. Can I regard this behaviour as another bug or is there possibly a hardware defect?
I have already tested different software and Firmware versions. (At this moment, the actual Firmware from December 30. 2021 is installed, it doesn't help...)
Here a video of this issue.
https://1drv.ms/v/s!AiPaG0Dlc3q2gZZ0pJNZPpmzM4aY8g?e=anox9T

Maxie

Unfortunately I have the same issue on my 2D10 I received just a couple of days ago from Banggood.
Displaying signal at 4k and 40k points works OK, but when I go higher in memory settings, the scope starts behaving badly.
Memory settings 400k, 4M and 8M are unusable.
This happens almost instantly when I change the Volts/div setting, zooming in on the signal.
If I switch it OFF and ON again, the problem comes back by adjusting V/div.
The problem exist also in GND coupled mode or even the probe disconnected with no signal at all.
Serial: CN21350290127xx
SW: 20210726
HW: 3.2.1.0.0.0.0.1
FW: 3202
I have since tried the latest SW from the Hantek site 20211230, it behaves the same.
I hope Hantek will reply, I'd like to know if it is a hardware or software defect and can we expect a fix?
My video of the problem is available here:
https://www.youtube.com/watch?v=gFO4QoYVsSE

naelolaiz

I have the same issue with a brand new 2D15. I also tested it with the provided firmware, and the latest one.
Here are my videos:
https://www.youtube.com/watch?v=7vd8mAi3oPI
https://www.youtube.com/watch?v=MJYGLvc7Mws

Edit: other issues on the device:First: the sine frequency does not match the frequency of the generator.  Or the generator is really that bad that makes a 0.6 Hz modulation? Second: a different type of noise appears at the end of the buffers acquiring at 40K.I don?t trust this device as a measurement/testing equipment as far as it is behaving. Is is expected to behave this bad? Are all these hardware or software/firmware issues?
video url: https://www.youtube.com/watch?v=186fGh3LLVw
                                                        
                                            

wangshuang

naelolaiz replied at 2022-1-5 04:48
I have the same issue with a brand new 2D15. I also tested it with the provided firmware, and the la ...

Thank you for your feedback. This problem has been reported to the engineer, and I will notify you when a new firmware is released.

masta-k74

wangshuang replied at 2022-1-7 11:57
Thank you for your feedback. This problem has been reported to the engineer, and I will notify you ...

I assume now that you are also assuming a firmware bug and not a hardware defect?

filipj

I have also faced a problems with Memory depth larger than 4k, but with FFT (spectre on negative frequencies...)
https://www.eediscuss.com/forum. ... id=15885&extra=
Have not got any reply on this topic though...

masta-k74

There is a new Firmware (dso3kb_20220118.upk) on official Website

masta-k74

This problem still persists...

masta-k74

One could almost get the impression that nobody is interested. I am well on the way to turning my back on Hantek for good. At any rate, you can't call that customer service. If a solution to the problem is still being sought, it would be desirable that it is at least communicated.
Return shipping to China is out of the question for cost reasons. Shipping from Germany costs about ?100, half the price of the device. In addition, you can read here from others who have tried it that there are sometimes problems with customs. Then the device and the money would be gone.

Maxie

Looks like there is no solution to this issue.
The only feedback we received is that the problem has been reported to the engineer.
Shall I return my scope and ask for refund?