JYTEK USB-61210, User Manual

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Operation & Calibration 29
Figure 3-11: Pre-Trigger
Post-Trigger or Delayed-Trigger Acquisition Mode with Retriggering
Post-trigger or Delayed-Trigger acquisition with re-trigger function is
indicated when data is to be collected after several trigger events. An
example is shown, in which N samples of data are acquired after the
first trigger signal, after which the USB-61210 awaits the next re-trigger
signal (re-trigger signals occurring before the N samples are completed
will be ignored). When the re-trigger signal occurs, another N samples
are performed. The process repeats until the specified number of
re-trigger signals are detected.
Figure 3-12: Post Trigger with Retriggering
Gated Trigger
Gated-trigger acquisition is indicated in applications where you want to
collect data when trigger events are set to level high/low, and hold
acquisition when trigger events are set to the opposite level.
Time
Ɣ Operation initiates
Ɣ Acquisition initiates
Trigger
Data
Ɣ Trigger Event Occurs
Ɣ Acquisition stops
Ɣ
Data transfer to system begins
N samples
This data is
discarded
Only the N acquired
samples are
returned to system
Time
Ɣ
Operation initiates
Trigger
Data
Ɣ Trigger event occurs
Ɣ Acquisition initiates
N samples N samples N samples