Products > Test Equipment

Hantek 6022BE 20MHz USB DSO

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rogerjames99:
I am using the current github head OpenHantek6022 on a box running Ubuntu Focal and having issues with missing triggers. I can see traces flying past on the screen but trigger does not fire. Changing the timebase some times helps but it is not consistent. I have searched through this thread and seen some mentions of inconsistent triggering on Linux, but nothing definitive. Any suggestions anyone.

The pulse train I trying to stop on is a nice clean square wavr and occurs about once every 10 seconds.

horo:
Hi,

tl;dr:
Due to missing trigger hardware the scope is not well suited for detecting sporadic signals, it is best suited for measuring periodic signals in time and frequency domain in the extended AF range (1 Hz to 1 MHz).

More detailed answer:
As the scope has no trigger hardware the triggering happens completely in software
The program samples (free-running) a block, checks if a valid trigger condition exists _and_ if there are enough samples before and after the trigger condition to display a full screen and if these conditions are met it displays the data (and stops the scanning in single mode). In roll and auto mode, non-triggered tracks will also be displayed. You should select the most aggressive sampling in the Oscilloscope/Settings/Minimum Time menu... menu (set to 500µs) to avoid missing the trigger.

Please read this section and have a look at the source code.

Martin

EDIT: it is not related to Linux, it's the missing HW support.

rogerjames99:
Thanks for the detailed and informative reply. I will rack up the sample rate as high possible.

Cheers,
Roger

ViktorEEV:
Here are signed WinUSB drivers for the Hantek 6022BE/BL.

ronee:
Hi everyone,

First post, but first a big thanks to the people who made this Hantek 6022 software!

I had bought of these and on the supplied program I couldn't even get a sine wave to show. I was ready to heave it into the garbage can. But then I discovered the six different programs that might help info on the net and thought to try one or two. I liked this one but windows blocked my XP attemps with "this is not a valid win 32 application" So onto Linux where after many failed attemps I got it working on an old Lenovo.

After some playing around I now have it working nicely! I like the space bar! But the 5 volt input was a potential problem for me.

100X probes were not the answer. However, what If I series two 10X probes? So a little experiment. I had an old probe in the junk box so connected it up and used a 1 meg resistor
to terminate the working probe (it was only 983 ohms so my readings are out a bit but close enough to show that the experiment will work)  All this because I didn't have any 900K resitors to make just a resistor front end. Now that this works that will be my next step.

Some pics of the experiment:

Ron


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