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4.5.2
Reference Trigger
User can configure a trigger condition and acquire the data between trigger asserted
in the Reference Trigger mode. Data acquired before trigger occurred is pretrigger
samples. Data acquired after trigger occurred is posttrigger samples. User can
configure two parameters, “Pretrigger
Samples
” and “
SamplesToAcquire
”
to capture
specified data as shown in Figure 20.
This trigger mode is only suitable for finite acquisition mode. The default number of
pretrigger samples is 0.
Example
⚫
SamplesToAcquire: 1000
⚫
PretriggerSamples: 10
⚫
Posttrigger samples: 990 (1000-10)
Sample
Acquisition
in Progress
Sample Interval
Trigger
Pre Sample
Post Sample
10 Samples
990 Samples
Figure 20 Reference Trigger mode
4.5.3
Retrigger
User can configure a specified trigger condition and repeated trigger times to capture
signal. The number of repeated trigger times is set by the parameter
“
ReTriggerCount
”.
For example, we set the ReTriggerCount to N and the length of each acquisition to M,
therefore the total acquired samples is N * M * channelcounts as shown in Figure 21.
Note, Retrigger mode is only valid in finite acquisition mode.
