Rigol DS1000C User Manual page 82

RIGOL
Key Points:
H (High): Logic high: voltage is higher than threshold setting.
L (Low): Logic low: voltage is lower than threshold setting.
X (Ignore): Don't care. If all the channels are ignored, the oscilloscope won't be
triggered.
Qualifier: A timer begins when code terms are satisfied. Duration trigger occurred
in the time set by the qualifier.
© Copyright RIGOL Technologies, Inc. 2007.
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User's Guide for DS1000 Series