JYTEK PCIe-69834, Руководство пользователя

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20 Operations
Figure 3-7: Pre-Trigger Mode Acquisition
3.4.4 Middle Trigger Mode
Collects data before and after the trigger event, with the amount to
be collected set individually (M and N samples), as follows
Figure 3-8: Middle Trigger Mode Acquisition
3.4.5 Acquisition with Re-Triggering
A digitizer acquires a trace of N samples/channel for a single
acquisition. Re-Trigger mode can also be set to automatically
acquire R traces, containing N*R samples/channel of data, without
additional software intervention.
The Re-Trigger setting can be used for Post-Trigger and Delayed-
Trigger modes, with different limitations on the spacing between
Time
Operation start
Acquisition start
Trigger
Data
Trigger Event Occurs
Acquisition stop
Data transfer to system begins
N samples
X samples have been acquired
before trigger occurs, where X<N
Trigger signals occuring before the specified
amount of data has been acquired are ignored
Time
Operation start
Acquisition start
Trigger
Data
Acquisition stop
Data transfer to system begins
N samples M samples
Trigger event occurs