Grass Valley T2 Classic iDDR Workstation Mode SP2 - Manual (Page 104)

T2 ― UserManual(SP2) ― Workstationmode ― 104
Section3― Workstationmode
GPI tab
Trigger GPI Choose the GPI trigger to specify setting.
Start of Event Check this option to set the start of an event as a trigger.
End of Event Check this option to set the end of an event as a trigger.
Start plus
Check this option to set a certain point from the top of an event as a trigger,
and then specify the value.
End minus
Check this option to set a certain point before the end of an event as a
trigger, and then specify the value.