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Advanced Triggering, Search & Navigation, and Segmented Acquisition Labs 3

4000 X-Series Oscilloscopes Advanced Training Guide 45

You should now see a synchronized display as shown in Figure 24. The

scope triggers on the 1st edge of a burst of pulses (center- screen) and

then disables triggering for 45.00 µs (holdoff time). During this holdoff

time, the scope ignores the 2nd, 3rd, 4th, etc., crossings, and then re- arms

triggering after the end of the burst, but before the beginning of the next

burst, which is during the signal’s “idle-time”. The next valid trigger event

will again be the 1st edge crossing on the next burst.

Figure 24 Using the scope’s trigger holdoff feature to synchronize on a burst of pulses.

Trigger Point

Next Valid Trigger Event

Holdoff Time

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 167 168

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Agilent Technologies 4000 X Manuale di Servizio Pagina 45