Grass Valley Kayak HD v.6.9.3 - Manual (Page 494)

494 Kayak — User Manual
Section 7 — Sidepanel Menu Summaries
GPI Index Card
Index card for modifying the GPI parameters.
Figure 407. Sidepanel – Index Card GPI
Select Modify to determine whether 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.