Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 80)

64
Master Control
Overview
Source Groups
A source group is a set of sources chosen from all of the available channel sources. They allow
iMC panel operators to select between different groups of sources using ‘Group Select’ buttons.
When a source group button is pressed, the sources included in that group are mapped onto
the program, preset, and aux buttons of the panel.
The Imagestore 750’s master control configuration allows the definition of any number of
source groups. The number of entries in each source group is generally chosen to equal the
number of panel buttons allocated for sources on the iMC control panel. When a broadcast
facility has a mixture of different panel sizes, you can configure source groups of different sizes
for use with the appropriate panels. (A source group can have up to 24 entries because the
maximum number of source buttons on any panel is 24.)
Sources can be included multiple times within a source group, and the same source can also be
used in multiple source groups. For example, the main network feeds can be placed on the left-
most 2 buttons of every source group to make them easier to select in an emergency. There can
also be gaps within source groups. Where a source group has gaps in it, the source buttons on
the iMC panel are disabled and darkened. Pressing a disabled source button does nothing.
 The names of source groups must be ASCII.
Router Salvos
A salvo is a sequence of router control commands — defined in the NV9000 router control
system — that will execute, in order, when the salvo is invoked either by a button press or a
channel change at a panel. Salvos can be used by iMC panels during a channel acquisition to
route the Imagestore 750’s outputs to a monitor wall, or to perform other custom monitoring
tasks when the user presses a ‘Salvo’ button on the iMC panel.
Note: Salvos must be defined in the NV9000 configuration software, which is outside the scope
of this document. Please refer to the NV9000 documentation, specifically the NV9000-SE Utilities
Users Guide, listed under
Applicable Publications and Tools on page 3.
Router Destinations (Feeding Program and Preset Inputs)
In the iMC master control system, a router destination is synonymous with an output (from the
router) and a router source is synonymous with an input (to the router).
Router destinations and sources are set up during configuration of the NV9000 Router
Controller and each may comprise one or more feeds.
A router’s function is to connect its sources to its destinations.
The Imagestore 750’s settings for router destinations identify the NV9000’s router destinations
that feed its program and preset inputs. The program bus receives input at the A IN connector.
The preset (a.k.a. preview) bus receives input at the B IN connector. The settings represent phys-
ical connections between the router and the Imagestore 750.
As a panel operator selects a video source on the program or preset bus of the panel, the
Imagestore 750 issues commands to the NV9000 system controller to perform appropriate
source switches. Pressing a program source button performs a “hot-cut” of the video source on
the channel processor’s program bus. Pressing a preset source button changes the video source
on the channel processor’s preset bus showing the source to which the A/B mixer will next tran-
sition. All source switches in the router are tallied back to all iMC control panels that own the
channel.