Grass Valley MV-825-RTRUM Multiviewer with Integrated Router User Manual

Table G-1: Router Terminology (continued)  

Term  

Input  

Definition  

Router input connection.  

Null Source  

Output  

A video or an audio channel source of ‘null source’has no effect  

when routed.  

Router output connection.  

Partial Source  

Pre-defined Source  

Port  

A user-defined source which contains one or more ‘null sources’.  

A source inherently defined in a router. These are not editable by  

the user. In MV-825-RTR, these are associated sources.  

Input or output signal connection to the router.  

Port Name  

Name given to a router port. Typically, the name can be edited.  

Number assigned to a router crosspoint port. The number is fixed.  

Port Number  

Protect destination  

A feature of a destination. Set ‘Protect Destination’on a destination  

to prevent a route being made to it.  

‘Protect’ is an operational control.  

Route  

The connection made within a router in a crosspoint, connecting an  

input to an output.  

Router  

A MV-825-RTR unit contains a router function. This functional block  

has physical input and output signal connections, where the inputs  

can be routed to any output.  

Signal  

Source  

Information carried by a connection between equipment in a  

facility. For example video or audio data.  

A set of one or more crosspoint inputs which can be routed at the  

same time.   

For example, video together with embedded audio channels.  

Source port name  

Tally  

Name assigned to a source. For example, “BBC News”.  

Message sent out of a comms port by a router to confirm that a  

command to set a route has been received. It does not mean that a  

route has been set.  

Timed switch  

Switching between two signals in a crosspoint switch at a time  

consistent with SMPTE RP-168-2009. The timing of the switching is  

governed by the signal being switched to.  

232  

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