Grass Valley NV9654 v.1.1 - Manual (Page 67)

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NV9654
User’s Guide
Operating Concepts
Status for most or all operations is presented on the alphanumeric display if it is present and
turned on (and occasionally on certain buttons).
Levels
In NV9000-SE Utilities and in the NV9000 router control system, routes occur on levels. A level is
typically SD, HD, analog video, AES, analog audio, or machine control. Various devices are
defined as sending and receiving signals on certain levels. The set of levels handled by a device
belong to what is called a level set.
A source can be routed to a destination if it has the same set of levels, i.e., it belongs to the same
named level set. A source can be routed to a destination in a different level set if the NV9000
configuration has the appropriate level mapping.
The effect of this is that when you, the operator, choose a destination, the NV9000 system recog-
nizes its levels and which source devices are allowed to be routed to the destination and limits
your selection to those sources.
Breakaway
Routes can be all-level in which case they are taken on all levels defined for the destination. The
acceptable sources for a route have the same levels as, or some configured mapping to, the
levels of the destination.
A breakaway can occur in X-Y mode. A breakaway is where you take different sources to the
same destination
— on different levels.
It is not possible to take different sources to the destination on the same level. For instance, you
cannot take SD from two different sources. The outcome would be noise even if you could do it.
(That is because routers are not mixers.)
Level Grouping
Virtual levels can be grouped. This diagram illustrates grouping:
There are two types of virtual levels: basic and abstract. Basic virtual levels are those that
correspond to actual physical levels. Abstract virtual levels do not correspond to physical levels.
In the illustration, the 5 “Aud x” levels are grouped under ‘Audio’. The two video levels are
grouped under ‘Video’.
The levels ‘Video’ and ‘Audio’ are abstract levels; the other levels are basic levels.
 The NV9654, at present, ignores the concept of level groups, and presents any configured
level groups as completely expanded. That is, it always displays basic levels and never
abstract levels.
HD SD Aud1 Aud2 Aud3 Aud4 Aud5
Video Audio
. . .