Technical data

62 4000 X-Series Oscilloscopes Advanced Training Guide
3 Advanced Triggering, Search & Navigation, and Segmented Acquisition Labs
Your scope should now be triggering on positive runt pulses of two
different widths as shown in Figure 37. Note that as shown in previous
labs, the high and low trigger levels can be set using the touchscreen with
the T
L
and T
H
markers to the left of the display. You can also change the
polarity of the runt triggering to either “positive runts only”, “negative
runts only”, or “either polarity runts” using the appropriate softkey
selection. Note that the Agilent 4000 X-Series oscilloscopes can also trigger
on runt pulses that meet a specific time qualification. Based on the
scope’s current timebase setting (100.0 ns/div), we can estimate that the
width of these two positive runt pulses shown in Figure 37 are
approximately 300 ns and 100 ns wide. Let’s set up the scope to uniquely
trigger on the positive runts that are < 200 ns wide. In other words, let’s
isolate the smaller of these two runts.
13 Tap the Qualifier softkey; and then select “<”.
14 Double- tap the Time softkey and enter 200.0 ns.
Figure 37 Triggering on positive runts.