GRASS VALLEY Encore, Configuration Manual

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124 Encore — Configuration Manual
Section 5 — Router Configuration
Segment
A Segment is a unique sub-set of Matrix crosspoints within a single Cros-
spoint Group. All crosspoints in a Segment must be of the same signal type
and all crosspoints in a Segment must be populated. A Crosspoint Group
must have at least one Segment, but can have as many as eight. An input
can belong to multiple Segments, but an output can belong to one, and only
one, Segment. Encore Segments are similar, but not identical to Grass
Valley Group SMS7000 Slices.
The
Segment type
allocation of inputs and output IDs is either as blocked or
as interleaved. The blocked
Segment type
uses contiguous connectors within
the range allocated to the segment. Interleaved segment types use only
every
n th connector where ‘n’ is the interleave factor, and the remaining
connectors would typically be assigned to other Segment(s) so that the Ele-
ments within a Level use contiguous connectors. An Element is a cros-
spoint within a Logical Matrix that switches when you do a Take. An
Element is mapped to a Segment.
Segments are normally assigned to a single Logical Matrix, however you
can configure a Segment as shareable to permit assignments to up to eight
Logical Matrices. A shareable Matrix Segment is typically used to ran-
domly allocate input and output connectors to multiple Levels which can
be switched using the same crosspoint type (e.g., HD and SD Levels using
HD crosspoints).
Each segment has the following parameters:
• Segment identifier (2 characters unique to the Crosspoint Group). Not
required if the Crosspoint Group has only a single segment.
• Input connector start and end (constrained by Crosspoint Group max
input).
• Output connector start and end (constrained by Crosspoint Group max
output).
• Segment type (Blocked or Interleaved).
• Interleave factor for Interleaved segments.
• Flag for unique or multiple attachment to Logical Matrix elements.
When multiple attachments are permitted, a number of logical matrix
elements may share the crosspoints within this segment.
Segments are uniquely mapped to crosspoints (hence outputs). In other
words, a crosspoint (hence output) belongs to one and only segment. The
interleave factor for interleaved segments is automatically taken into
account when determining crosspoint usage.