EXFO PSO-200 Optical Modulation Analyzer - Manual (Page 45)

Performing Acquisitions
Optical Modulation Analyzer 37
Activating Trigger-Based Acquisitions
To activate triggered acquisitions:
1. From the Settings menu, select Acquisition.
2. Under the Gate Acquisition tab, select Acquire a burst when
receiving a signal....
3. Select the trigger parameters as follows:

Number of recorded bursts: bursts buffered in memory, overriding
the equivalent setting in the General tab.

Number of bursts to acquire per trig event

Stop acquisition after N trig events: will stop after this number of
“useful” trigs (trigs leading to a burst acquisition, not counting
skipped trigs).

Save to file after stopping the acquisition: the acquisition will be
saved in the location (path) specified in General Settings, using
autonaming if enabled (or generic names “OMDFileX.omd”
otherwise). A file can contain at most 140 bursts.

Trig signal: select whether to use the rising signal (reaching 2.5 V
upwards) or the falling signal (reaching 2.5 V downwards).
4. Click Apply to confirm your settings, or OK to also close the window.
5. Connect your external equipment to the Trigger port on the PSO-200
front panel.
6. Press the Start button. The application will wait for the trigger signal.