DSO2D10 - issues with GND coupling and FFT cursor, firmware question

e_admin678

Customer consultation
Hello,
I have three questions concerning my recently procured Hantek DSO2D10:

• The device is reporting a small voltage on CH1/CH2 when GND coupling is enabled. I have run the calibration after waiting approx. 20 minutes for the device to warm up and I still get this error. It's around 40 for CH1 and around 20mV for CH2 at 1V/div setting. Is this normal for this scope?
• The curson tracking of FFT is not accurate. It seems to be a bit off to the right, reporting incorrect X/Y values Please see the video (1MHz signal from built-in AWG)
• My device has been  updated recently with the update file dso3kb_20221028.upk downloaded from your site. The reported software is correct - 1.0.2.0.0(221028.00), but the firmware remained the same - 3202. My hardware version is 003.002.001.000.000.000.000.001. Will you provide an official update to the firmware version as well?
  

e_admin678

1 This is a normal phenomenon, so don't worry
2 Adjust the display type and change the type to * point* in * display *（The MATH waveform is not composed of points, so the cursor cannot find the position）
3This is the firmware upgrade package. Upgrade the firmware to 3205

baspacc

Hi,

these were my questions, thank you for the answers and posting these here. Few remarks to these points:
1. Understood. I assume these values are the noise within acceptable limits.
2. I changed the display to dot mode and now I see that the graph is in fact a strong approximation based on limited number of points. Still, the data provided by the cursor menu is inaccurate. See two screenshots of 1Mhz square signal. When AX points at 1MHz, the AY value is much lower compared to AY value at e.g. 1.125 MHz.

  

But the visual approximation (continous graph) seems to do the job quite right - the peak seems to be at 1MHz. Any chance to have that improved, e.g. by having the cursor follow the approximation and display values from that approximation (whatever you use to plot the graph). Or to make the cursor jump between points (rather than move continously) to avoid giving incorret values inbetween them?
3. I updated the firmware, thank you. One thing I noticed is that the software in status has different date now (it went back from 221028 to 220928). But the version number is the same (1.0.2.0.0). Does that mean that it is the same OS level software?

Thank you for your active support!

Jing

baspacc replied at 2022-12-6 21:29
Hi,

these were my questions, thank you for the answers and posting these here. Few remarks to these ...

Dear  Sir ,
The difference between the two software upgrade packages is that the October one updated the defects on the basis of the September one.
Thank you for your advice and support.