Blackmagic Design Videohub Master Control Pro Installations- Und Bedienungsanleitung Seite 43

Configuring GPIs
The GPI and Tally Interface has 8 GPIs that provide crosspoint switching. In the example below,
if GPI 1 detects a contact closure it will switch Input 12 on your Videohub to Output 1. This means
when you switch the joystick control on your CCU, video going to Input 12 of your Videohub will
be previewed on your monitor.
The crosspoints can be configured in the Videohub Hardware Panel Setup simply by clicking
inside the Input and Output fields on the diagram and typing in the Input or Output number.
The Videohub Control Settings pane offers two ways to preview the output from your Videohub.
Click inside the diagram to change inputs and outputs for GPI crosspoint switching and tally
Latch Video
If you want the output to stay as selected, choose 'latch video'. This means you can press the
switch once on your CCU and the input from the selected crosspoint will stay on your monitor
until another crosspoint is selected.
Select 'latch video' if you want your preview to hold until another
crosspoint is selected. Choose 'momentary hold video' if you want
your preview to revert back to the previous crosspoint when you
release the control switch
Momentary Hold Video
Select this option if you want the output to return to the previous input after you let go of the switch
or joystick control on your CCU. For example, when you press and hold your switch, Input 13 might
be previewed, but will return to displaying Input 12 on your monitor once you release the switch.
Configuring GPIs 43