ADLINK DAQe-2006 - Manual (Page 63)

Operation Theory 51
Trigger Modes
Post-Trigger Generation
Use post-trigger when you want to perform DA waveform right
after a trigger event occurs. In this trigger mode DLY1_Counter is
ignored and not be specified. Figure 4-15 shows a single wave-
form generated right after a trigger signal is detected assuming the
data in the data buffer are 2V, 4V, 6V, 3V, 0V, -4V, -2V, and 4V.
The trigger signal could come from a software command, an ana-
log trigger or a digital trigger. Refer to section 4.5 for detailed infor-
mation.
Figure 4-15: Post Trigger Waveform Generation
Delay-Trigger Generation
Use delay trigger when you want to delay the waveform genera-
tion after a trigger event. In Table 4-16, DA_DLY1_counter deter-
mines the delay time from the trigger signal to the start of the
waveform generation, assuming the data in the data buffer are 2V,
4V, 6V, 3V, 0V, -4V, -2V, and 4V. DLY1_counter counts down on
the rising edge of its clock source after the trigger condition is met.
When the count reaches 0, the counter stops and the DAQ-/
DAQe-/PXI-2016/2010/2006/2005 card starts the waveform gen-
eration. This DLY1_Counter is 16-bit wide and you can set the
delay time in units of TIMEBASE (delay time = DLY1_Counter/
TIMEBASE) or in units of update period (delay time =