Hantek 2C42 random pulses in roll mode

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Don't hold your breath waiting for a feedback, Hantek's staff is too busy rushing to release a new buggy half-finished product or simply don't care.

The voltage offset in the channels is an inherent problem of this device, I reported it some time ago, never got an answer: https://www.eediscuss.com/forum. ... 2&fromuid=26055
I called the attention for the problem again in another thread, while solving a problem in a different product: https://www.eediscuss.com/forum. ... 8&fromuid=26055

Others also noted that, again, no solution: https://www.eediscuss.com/forum. ... 4&fromuid=26055

This "lifting" you call in the traces (offset) is normal in the oscilloscopes but it should be compensated during the calibration. For me, the offset changes depending on the volts/div setting, number of channels on or if the charger is connected. Running the calibration while charging yields the best results for me, try it to see if it improves in your case (leave the device on for about 15min to warm up before the calibration).

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I tested it and found something similar (I have FPGA 4 and ARM 219082801), not as bad but, eventualy there is a pulse in roll mode with the channels set to GND coupling:


Bug bonus: if you set a channel to GND coupling and put it in roll mode, when the trace is moved to bellow the first square after the centre line, the trace disappers and you will find it on the top of the screen, with AC and DC coupling it works fine:

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Equizer replied at 2019-11-10 04:00
Software version 2019103001 nothing has changed, problem is still present!
I waited way more than a  ...

Now I'm curious, what are you measuring that you need so badly to use an oscilloscope with the inputs coupled to ground and set in roll mode?