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Controlling Videohub with Hardware
Configuring GPIs
The GPI and Tally Interface has 8 GPIs that provide crosspoint switching. In the example on the left, 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 Control Utility 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.
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.
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 Tally
Tally is usually a lamp on the front of a camera to indicate that it is on air, but its a useful visual indicator and
can be used on any equipment to indicate activity and doesn't have to be used specifically with cameras.
The GPI and Tally Interface has 8 configurable GPOs, which send a tally signal to your cameras or other
devices under certain crosspoint conditions. In the example on the left, GPO 1 is configured so that when
Input 16 on the Videohub is routed to Output 1, GPO 1 will be activated.
The crosspoints can be configured in the Videohub Control Utility simply by clicking inside the Input and
Output fields on the diagram.
GPO Match
Enable the GPO match checkbox to replicate the configuration of your crosspoints from GPIs to GPOs.
This can be useful if you want to see a tally light activate when changing routes for your GPIs.
When this checkbox is enabled, the GPO half of the diagram will be grayed out and cannot be edited until
the GPO match checkbox is disabled.
Click inside the diagram to change inputs and outputs for GPI
crosspoint switching and Tally.
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.
Enable the GPO match checkbox to replicate the crosspoint
configuration of your GPIs.
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