
Digital Storage Oscilloscope 63
4.
If the waveform is rolling continuously on the screen but can not be
triggered, follow these steps:
1)
Check the trigger source to make sure it consistent with the input channel;
2)
Check the trigger level to assure its correct adjustment. You may push the
TRIGGER LEVEL knob or press the SET TO 50% button to reset the trigger level
back to the center of the signal;
3)
Check the trigger mode to confirm it is a right choice for the input signal. The
default trigger mode is edge trigger. However, it is not suitable for all kinds of input
signals.