30
maximum delay time is the period of TIMEBASE X (2
32
- 1), while the minimum delay is the
period of timebase.
Time
Operation
start
Trigger
Data
Trigger Event
Occurs
Acquisition stop
Begin to transfer data to
system
N samples
Acquisition start
Delay Time
Figure 3-15: Delay-trigger Mode Operation
3.5.5 Post-trigger or Delay-trigger Acquisition with Retrigger
Use post-trigger or delay trigger acquisition with re-trigger function to collect data after
several trigger events, as illustrated in Figure 3-16. You can program the number of triggers
then the digitizer will acquire a specific sample data each time a trigger is accepted. All of
sampled data will be stored in onboard memory first until all trigger events occurred. Thus
the time between last sampled data and next trigger event can be only one clock period of
timebase. After the initial setup, the process does not require software intervention.
Time
Operation
start
Trigger
Data
1st Trigger Event Occurs
N samples
N samples
2nd Trigger Event Occurs
Figure 3-16: Re-trigger Mode Operation.
