Grass Valley NV7512 v.1.3 - Manual (Page 35)

NV7512 Audio Router • User’s Guide 25
1. Introduction
Active Cards
Figure 1-19 shows the flow of signals through the crosspoint card.
Figure 1-19. Crosspoint Card Block Diagram
When facing the front of the router, crosspoint cards can be installed in one of four horizontal slots.
(See
Front Slots on page 9.) The slot determines which signals the crosspoint card manages. For
example, the crosspoint card installed in the top slot — Slot A — manages all inputs and outputs 1-
256. For a description of each slot and outputs managed, see Crosspoint Card Slots and Outputs on
page 7.
Minimum Crosspoint Cards Required
The switching configuration being implemented determines the minimum number of crosspoint
cards required. Because each crosspoint card receives all inputs, but routes signals to only four out-
put cards, only those crosspoint cards managing outputs need to be installed. For a list of crosspoint
cards required and the slot in which a crosspoint card must be installed to route specific signals, see
Crosspoint Card Slots and Outputs on page 7.
Local Inputs
via
Motherboard
TDM
Multiplexer
TDM
Demuxer
(3)
Expansion
Connectors
(up to
3 routers)
Crosspoint Card
3 copies
TDM
Crosspoint
Circuit
To connected
routers
(up to 3)
From connected
routers
(up to 3)
Local Output
Cards (4)