ADLINK PXIe-9852 - Manual (Page 31)

Operations 21
PXIe-9852
3.3.7 Trigger Export
When acquisition is initiated, a pulse synchronized with the Time-
base clock asserts and is output through trigger output, at a pulse
width programmable from 50ns to 10μs via software.
3.4 Trigger Modes
Trigger modes applied to trigger sources initiate different data
acquisition timings when a trigger event occurs. The following trig-
ger mode descriptions are applied to analog input function.
3.4.1 Post Trigger Mode
Post-trigger acquisition is applicable when data is to be collected
after the trigger event, as shown. When the operation starts, PXIe-
9852 waits for a trigger event. Once the trigger signal is received,
acquisition begins. Data is generated from ADC and transferred to
system memory continuously. The acquisition stops once the total
data amount reaches a predefined value.
Figure 3-5: Post-Trigger Acquisition
3.4.2 Delayed Trigger Mode
Delayed-trigger acquisition is utilized to postpone data collection
after the trigger event, as shown. When PXIe-9852 receives a trig-
ger event, a time delay is implemented before commencing acqui-
sition. The delay is specified by a 16-bit counter value such that a