中文概述：本文列出波形显示但无法稳定时的四个排查步骤。原文如下。
Q: Waveform appears but is not stable
A:
- Check that the trigger source channel is consistent with the waveform being viewed.
- Manually adjust the LEVEL trigger knob to see whether the waveform becomes stable.
- Use AUTO to adjust the waveform automatically to determine whether the waveform is stable.
- Adjust the time base to rule out false-wave interference (such as alias-displayed waveforms).
