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.
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