Blackmagic Design Videohub Master Control Pro Installations- Und Bedienungsanleitung Seite 44

Configuring Tally
Tally is usually a lamp on the front of a camera to indicate that it is on air, but it's 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 equipment under certain crosspoint conditions. In the example on the previous page, 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 Videohub Hardware Panel Setup 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.
Enable the 'GPO match' checkbox to replicate the crosspoint
configuration of your GPIs
Daisy Chaining Multiple GPI and Tally Interfaces
The GPI and Tally Interface supports 8 GPIs and 8 GPOs at a time, which should be enough for
most live television situations. However, if you have more than 8 cameras then you may want to
daisy chain a second or third GPI and Tally Interface.
The GPI and Tally Interface has two ethernet ports so that you can connect one port to a
Videohub and use the other port to link other GPI and Tally Interfaces together.
1 Connect power to the first GPI and Tally Interface.
2 Connect a standard RJ45 ethernet cable from your Videohub or network to the ethernet IN
port on the GPI and Tally Interface.
3 Connect power to the second GPI and Tally Interface.
4 Connect a standard RJ45 ethernet cable from the ethernet OUT of the first GPI and Tally
Interface to the ethernet IN port on the second GPI and Tally Interface.
This can be repeated for as many GPI and Tally Interfaces as you need as long as power is
supplied to all interfaces in the chain.
Sometimes it can get confusing to know which GPI and Tally Interface you are working with
when you have several connected. Select the GPI and Tally Interface in the Videohub Control
Panels pane and click the Identify button. The LED next to the ethernet IN port on the selected
device will light up.
Configuring GPIs 44