Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 82)

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Master Control
Overview
Channel Acquisition and Ownership
A typical broadcast environment will include multiple channel processors and multiple iMC
panels.
Sometimes each channel processor has a dedicated control panel, perhaps with a “super-user”
panel operator who is able to take over control of channels in emergencies. Alternatively, panel
operators may be responsible for monitoring and controlling several different channels. Flexible
arbitration of channel ownership between different panels is therefore provided for master
control environments.
The iMC panels have 4 channel acquisition methods (grab, drop, kick, share) to establish owner-
ship of Imagestore 750 channel processors:
• “Grab” — acquire ownership of a channel. A grab can succeed only if the channel is not
already owned by another panel or shared by other panels.
• “Drop” — release ownership of a channel. This method places the panel in a “no channel”
state.
• “Kick” — force the current channel owner(s) to drop a channel. The success of this command
depends on relative panel permissions and the ‘allow kick’ setting of the owning panel.
• “Share” — acquire joint ownership of a channel that is already owned by one or more panels.
The success of this command depends on the ‘allows sharing’ settings of the panels.
Channels can be owned by one panel, or shared by multiple panels if channel sharing is
enabled. When a panel already has ownership of a channel, other panels can attempt to kick-off
the owning panel to gain sole ownership for themselves. Alternatively, they can attempt to
share ownership with the current owner.
A flexible set of panel and channel ownership privileges and permissions allow for the many
possible permutations of panel setups at different broadcast facilities.
Each iMC panel is configured with (1) an ownership permission level, (2) rules for being kicked
and (3) rules for allowing channel sharing with other panels. Imagestore 750s can also impose
kick and share behavior on panels that want to control them based on relative permission levels.
This gives a flexible mixture of channel ownership models for different users.
Please see Panel Permissions Configuration on page 91 for further details on channel ownership
permissions and other settings.
Monitor Wall
Usually there is a dedicated monitor wall for every iMC panel. This monitor wall is used to view
the sources and the channel outputs that are relevant to the local panel.
When a panel acquires a channel, it causes the NV9000 system to make the appropriate router
switches so that its local monitor wall shows the appropriate Imagestore 750 outputs (program,
preset, clean-feed, and monitor), the current aux bus selection, and all of the sources within the
panel’s currently selected source group. This gives the panel operator a complete view of the
on-air channel output, any upcoming transitions, and all alternative sources.
Use the MCS Panel Configuration Editor to identify the router destinations that feed the local
monitor wall. The router destinations physically connected to the monitor wall.
Monitoring of the channel outputs (program, preset, clean-feed, and monitor) can be achieved
in two different ways: