Grass Valley NV9000-SE v.5.0 - Manual (Page 131)

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NV9000-SE Utilities
User’s Guide
The panel operator can (if a panel is so enabled) collapse or expand the display of virtual level
groups. A collapsed group is displayed as the group name. An expanded group is displayed as a
list of level names. In all cases, the operator views the display as a level or as levels.
Groups are useful when a level set contains a large number of virtual levels and the display on a
control panel becomes unwieldy. For example, if a level set has 2 video levels and 14 audio
levels, by placing the video levels in one group and all the audio in another group, the operator
can (by collapsing the levels) view just two “levels”
— video and audio.
 Only some control panels permit the expansion or contraction of virtual level groups:
NV9601, NV9640, NV9641, and NV9642.
“Takes” can be performed between two virtual level groups if the levels within the groups are
identical.
Creating Virtual Level Groups
Virtual level are created using the ‘Virtual Level Groups’ table and the ‘Virtual Levels’ table, both
accessed through the ‘Views’ pane.
The ‘Virtual Levels Group’ table allows you to create “parent-child” relationships between virtual
level types. For a group having M members, you must create M parent-child relations in the
‘Virtual Level Groups’ table. The parent is a virtual level type bearing the name for the group. The
child is a virtual level type that is to be a member of the group.
Before you create the parent-child relations, you must have created a new virtual level type (in
the ‘Virtual Levels’ table) that will bear the group name. This virtual level must not ever be used
as a normal virtual level. This virtual level type must not have an entry in the ‘Virtual Level Signal
Bindings’ table.
Levels at Control Panels
Control panel operators see only virtual levels, never physical levels. (At certain panels, opera-
tors can collapse grouped levels so that the panel displays only the group name or expand the
group to view all the level names.
Virtual levels (in a level set) displayed on a control panel appear in the order of their display
indexes which are sequence numbers. A virtual level’s display index is defined when you define
the virtual level.
The lowest number in the sequence is called the primary level. By widespread convention, a
video level is placed at the beginning (or top) of the list of virtual levels. NV9000-SE Utilities
supports the illusion that such a level is a “primary” level. In actuality, there is no such thing as a
primary level. All levels are treated uniformly.
However, some control panels can display only one level for a device. In those instances, it is the
first level that is displayed
— the level having the lowest display index. It is for that reason that
NV9000-SE Utilities calls the first virtual level the “primary” level. When configuring levels, you
should consider what level is displayed on control panels that display only one level.