Triggering 4
InfiniiVision 7000B Series Oscilloscopes User’s Guide 129
The selected pulse polarity is displayed in the upper- right corner of the
display. A positive pulse is higher than the current trigger level or
threshold and a negative pulse is lower than the current trigger level or
threshold.
When triggering on a positive pulse, the trigger will occur on the high
to low transition of the pulse if the qualifying condition is true. When
triggering on a negative pulse, the trigger will occur on the low to high
transition of the pulse if the qualifying condition is true.
4 Press the qualifier softkey (< > ><) to select the time qualifier.
The Qualifier softkey can set the oscilloscope to trigger on a pulse
width that is:
• less than a time value (<).
For example, for a positive pulse, if you set t<10 ns:
• greater than a time value (>).
For example, for a positive pulse, if you set t>10 ns:
• within a range of time values (><).
For example, for a positive pulse, if you set t>10 ns and t<15 ns:
5 Select the qualifier time set softkey (< or >), then rotate the Entry
knob to set the pulse width qualifier time.
The qualifiers can be set as follows:
• 2 ns to 10 s for > or < qualifier (5 ns to 10 s for 350 MHz
bandwidth models)
• 10 ns to 10 s for >< qualifier, with minimum difference of 5 ns
between upper and lower settings
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