Grass Valley DD35 Family v.3.1.5 - Manual (Page 313)

3. Menu Operation DD35 Production Switcher
3 – 161 Operating Instructions – Rev. 16 / 10.2001
Index card for modifiying the GPI parameters.
Select Modify to determine wheater the rising or falling edge of the arriving signal
(GPI 1 ... 8) is to be used.
A GPI is considered Active when current flows through the LED of the opto-coupler
at the GPI input. When no current flows the GPI is Inactive. Hence a Rising edge
is the transition from Inactive to Active, and a Falling edge is the transition from
Active to Inactive.
GPI