Grass Valley MRC v.1.2 - Manual (Page 98)

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Router Tools
Crosspoints Page
The following shows how video signals appear in the ‘Current’ table:
In the general case, audio crosspoints are treated the same way as video crosspoints.
However, for the NV8500 hybrid routers, audio is more complex because it can be embedded in
video signals and extracted and recombined at output and because the NV8500 hybrid routers
can have MADI input and output cards.
The hybrid disembedder (input) cards and hybrid embedder (output) cards support 16 channels
of embedded audio for each video input (or output).
The hybrid MADI input cards have one MADI input (64 audio channels) and the hybrid MADI
output cards have two MADI outputs (64 channels each).