Triggering 4
InfiniiVision 7000B Series Oscilloscopes User’s Guide 133
• Pattern 1 Entered — A pattern is entered on the last edge that makes
the pattern true (logical AND).
• Pattern 1 Exited — A pattern is exited on the first edge that makes the
pattern false (logical NAND).
• Edge 1
• Pattern 1 and Edge 1
2 Press the Find: softkey and select the Find stage condition.
3 To define the term(s) used in the Find stage, press the Ter m softkey and
select the pattern and/or edge term displayed in the Find: softkey.
4 If you select a pattern term, each channel in the pattern must be set to
a 1 (high), 0 (low), or X (don't care).
a Press the Channel softkey (or rotate the Entry knob) to select the
channel.
As you select a channel, the channel is highlighted in the selected
pattern list shown in the waveform area and is also shown in the
upper- right corner of the display next to “Seq”
b Press the 0 1 X softkey to set a level for the channel.
• 1 sets the pattern to high on the selected channel. A high is a
voltage level that is greater than the channel's trigger level or
threshold level.
• 0 sets the pattern to low on the selected channel. A low is a
voltage level that is less 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. If all channels in the pattern are set to don't care, the
oscilloscope will not trigger.
Adjust the trigger level for the selected analog channel by turning the
Trigger Level knob. Press the [Digital] key and select Thresholds to set
the threshold level for digital channels. The value of the trigger level
or digital threshold is displayed in the upper- right corner of the
display.
c Repeat for all channels in the pattern.
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