AMETEK i-iX Series II - Manual (Page 119)

User Manual California Instruments
i Series II / iX Series II / iM Series II 119
4.6.3.3 Trigger delay
The trigger delay field allows the user the set the amount of pre- or post-trigger data that should
be used when positioning the data acquisition window with respect to the trigger moment.
POST-TRIGGER DELAY
A positive trigger delay value means the acquisition window is delayed by the amount of time
specified. In this case, the actual trigger moment itself is no longer present in the acquisition
buffer. This situation is shown in Figure 4-38 where a 20 ms trigger delay is used after triggering
on phase A = 180°. The fundamental frequency of the output is 50 Hz. The trigger point is
indicated by the dashed line. It occurs on the first 180 degree point that occurs after the user
presses the ENTER key while on the START field. Once the trigger occurs, the acquisition holds
off the specified 20 ms at which point the data requested is captured. Using a positive trigger
delay value always yields post trigger data.
Figure 4-38: Positive trigger delay (Post trigger data)
Positive trigger delay values may be set from 0.0 ms to 1000.0 ms (1 second) in 0.1 ms
increments. The value may be entered directly from the keyboard or using the knob.