Grass Valley NV7512 v.1.3 - Manual (Page 17)

NV7512 Audio Router • User’s Guide 7
1. Introduction
Switching Configurations
Switching Configurations
The NV7512 is designed to be highly flexible, allowing the creation of a wide variety of configura-
tions for routing incoming and outgoing signals. A single router can route a maximum of 512
inputs and 512 outputs (AES synchronous stereo). By connecting two routers together, the number
of signals managed can be doubled to a maximum of 1,024 inputs and 1,024 outputs, increasing to
2,048 inputs and 2,048 outputs if the maximum of four routers are connected together (AES syn-
chronous stereo). Depending on the signal type and the corresponding input card or output card,
each card supports a minimum of 8 signals (AES synchronous at 192kHz) up to a maximum of 32
signals (AES synchronous at 48kHz). Switching configurations can be created based on 8 up the
maximum number of inputs and outputs allowed: 512 inputs and 512 outputs (1,024 inputs and
1,024 outputs mono).
Crosspoint Card Slots and Outputs
A single NV7512 can have up to four crosspoint cards, 16 input cards, and 16 output cards
installed. Each input card sends incoming signal information to all other crosspoint cards. This
enables each crosspoint card to route any incoming signal from any input card. However, each cros-
spoint card manages a maximum of four output cards. In other words, a single crosspoint card can
support a maximum of 512 inputs x 128 outputs (AES synchronous). Because a router frame can
house up to 16 output cards, to manage all 16 output cards, four crosspoint cards must be installed.
The router frame has four crosspoint card slots. (See Figure 1-2 on page 8.) The slot in which the
crosspoint card is installed determines which outputs are managed.
Figure 1-2 shows each crosspoint card slot. For clarity, the slots have been labeled A through D.
The crosspoint card installed in each slot manages signals as follows:
• Slot A — Routes all inputs and local outputs 1–128. Card is installed in the top slot.
• Slot B — Routes all inputs and local outputs 129–256. Card is installed in the center-top slot.
• Slot C — Routes all inputs and local outputs 257–384. Card is installed in the center-bottom
slot.
• Slot D — Routes all inputs and local outputs 385–512. Card is installed in the bottom slot.
Because each crosspoint card forwards signals to four output cards, only those crosspoint cards
routing outputs need to be installed. For example, if output cards for outputs 1–256 are installed,
then crosspoint cards only need to be installed in slots A and B; the C and D slots can remain
empty.