Grass Valley NV9642 v.1.2 - Manual (Page 58)

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Operation
Operating Concepts
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 system controller
recognizes 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 NV9642, 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.
Hold
Hold mode (and hold buttons) apply in both X-Y mode and multi-destination mode.
Breakaway
In X-Y mode, a hold button retains breakaway levels after a take.
Simply press the hold button at any time before the take.
A hold button is a toggle. Press it once to put the panel in hold mode; press it again to remove
hold mode.
HD SD Aud1 Aud2 Aud3 Aud4 Aud5
Video Audio
. . .