Agilent Technologies 2000 X-Series, Руководство пользователя

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132 Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide
10
Triggers
• For digital channels, press the [Digital] key and select Thresholds to set
the threshold level.
The value of the trigger level or digital threshold is displayed in the
upper- right corner of the display.
5
Press the pulse polarity softkey to select positive ( ) or negative ( )
polarity for the pulse width you want to capture.
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.
6
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:
10 ns
10 ns
Trigger
10 ns 10 ns
Trigger