54
4000 X-Series Oscilloscopes Advanced Training Guide
3
Advanced Triggering, Search & Navigation, and Segmented Acquisition Labs
You should now see on your scope’s display a digital burst waveform consisting of
six pulses of various widths, followed by an infrequent glitch similar to
.
Using the scope’s default Edge triggering mode, the scope usually triggers on the
1st pulse of this burst. Let’s now set up the scope to trigger on the 3rd pulse in this
burst using the “Nth Edge Burst” triggering mode.
9
Press the
[Trigger]
front panel key; then tap
Nth Edge Burst
using the
Trigger Type
menu.
10
Tap the
Idle
softkey; then set the minimum signal idle time to
2.00 µs
.
11
Tap the
Edge
softkey; then set the edge count to
3
.
Your scope should now be triggering on the 3rd rising edge in this burst as shown
in
. Note that the idle time setting of 2.00 µs defines when a burst ends
and begins. This setting must be set to a value that is greater that the longest
legitimate pulse width within the burst, but less than signal idle time between
each occurrence of the burst. To trigger on other edges within this burst, vary the
Edge count setting between 1 and 7.
Figure 30
Triggering on the 3rd pulse in the burst using the “Nth Edge Burst” triggering
mode.
