Contec DIG-100M1002-PCI User Manual page 47

4. Functions
Software trigger
The trigger that generates by not only external digital signal and analog signal but also software is called
a software trigger.
Software trigger is also called manual trigger or compulsion trigger.
The trigger signal can be compulsorily generated by software trigger even when the trigger formation
condition is set to external digital signal or analog signal,.
Digital edge trigger
It is the trigger occurs at the rising edge or the falling edge of external digital input signal, and the signal
level is LVTTL.
It is possible to input a trigger from other CONTEC board via the synchronization control connector
(CN6, CN7).
The BNC connector (TRG) for trigger I/O is used to input trigger signal form other instrument.
Analog edge trigger, hysteresis
It is the trigger occurs when an input signal to a specified channel of the digitizer intersects a certain
voltage level.
A rise, a fall or both direction is specified to the intersection of the voltage level.
The hysteresis can be set to voltage level to prevent the trigger from occurring by mistake for the noise.
Window trigger
It is the trigger occurs when an input signal to a specified channel of the digitizer is within or outside the
range of a specifid voltage for a certain period of time.
Specify two kinds of voltage levels, the upper bound value and the lower bound value, and set the time
of being within or outside that range.
The window trigger is a convenient function for measuring power malfunction such as short
interruption, voltage surge/sag, frequency variation, voltage descent and so on.
40
DIG-100M1002-PCI