Triggering 4
InfiniiVision 7000B Series Oscilloscopes User’s Guide 115
• 0 sets the pattern to 0 (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.
4 Press the Qualifier softkey to set the time duration qualifier for the
pattern.
The time qualifier can set the oscilloscope to trigger on a channel
pattern whose time duration is:
• less than a time value (<)
• greater than a time value (>)
• greater than a time value, but with timeout (Timeout). A trigger will
be forced at the timeout value, rather than occurring when the
pattern is exited.
• within a range of time values (><)
• outside a range of time values (<>)
The time values for the selected qualifier are set using the qualifier
time set softkeys (< and >) and the Entry knob.
5 Select a qualifier time set softkey (< or >), then rotate the Entry knob
to set the duration qualifier time.
< qualifier time set softkey
• When the less than (<) qualifier is selected, the Entry knob sets the
oscilloscope to trigger on a pattern duration less than the time value
displayed on the softkey.
• When the within time range (><) qualifier is selected, the Entry knob
sets the upper time range value.
• When the out of time range (<>) qualifier is selected, the Entry knob
sets the lower time range value.
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