4 Triggering
138 InfiniiVision Oscilloscopes User’s Guide
• 0 sets the pattern to zero (low) on the selected channel. A low is a voltage level
that is less than the channel's trigger level or threshold level.
• 1 sets the pattern to 1 (high) on the selected channel. A high is a voltage level that
is greater than the channel's trigger level or threshold level.
• X sets the pattern to don't care on the selected channel. Any channel set to don't
care is ignored and is not used as part of the pattern. However, if all channels in the
pattern are set to don't care, the oscilloscope will not trigger.
• The rising edge ( ) or falling edge ( ) softkey sets the pattern to an edge on the
selected channel. Only one rising or falling edge can be specified in the pattern.
When an edge is specified, the oscilloscope will trigger at the edge specified if the
pattern set for the other channels is true.
If no edge is specified, the oscilloscope will trigger on the last edge that makes the
pattern true.
Specifying an Edge in a Pattern
You are allowed to specify only one rising or falling edge term in the pattern. If you define an edge
term, then select a different channel in the pattern and define another edge term, the previous
edge definition is changed to a don’t care.
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