B&K Precision 2532B - Manual - Manual (Page 176)

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Check the trigger mode on the trigger interface whether or
not it’s in “normal” or “single”, and check the trigger level
whether or not it is over the wave range. If yes, please put
the trigger level to the middle position or set the trigger
mode to the “Auto” position. Another way is to choose the
“Auto” button to set up automatically.
6. After the Acquisition is set to Averages or Display Persistence
time is set too long, the waveform refreshes slowly.
It is normal in these settings.
7. The signal is displayed as a ladder-like waveform
1. This phenomenon is normal. The time base may be too
slow. Turn the horizontal SCALE knob to increase
horizontal resolution to improve the display.
2. Maybe the display Type is set to “Vectors”. You could
set it to Dots mode to improve the display.