I am using BK Precision 2125C Dual Trace Oscilloscope (30 MHz), which is analog. I'm trying to observe signal generated by the output of microprocessor. I'm seeing flickering signal (quickly moves left and right to the sides of scope) for which I know it's most probably not flickering like that in real "life" but that is most likely some scope's triggering issue. I'm almost sure that is the case since I observed normal square wave before this one and it also flickered like current one, at some trigger setting, but after re-setting trigger, there was no more flickering.
This flickering is really annoying when trying to observe little changes in the signal or read its period.
Here is the video to measurement of flickering signal.
Just for reference, for this measurement, I'm using following setup:
- DC coupled input, CH1 (get same behavior with AC input coupling)
- coupling: norm (same behavior with "auto" or "TV-V" or "TV-H")
- source: CH1
- main mode (not mix or delay mode)
- voltage/div: 2V/div
- time base/div: 2ms/div
Regarding "trigger level" and "hold off", however I turn both knobs (literally any combination), I always get flickering or unsynchronized signal. Otherwise, I'm measuring at output of MCU (10k pull-up, UART transmission) with normal passive probe (in 1:1 internal divider rate).
Any ideas how should achieve the view of "standing-still" looking signal at the screen of scope?