Belden Grass Valley NV8900, Руководство пользователя

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5
NV8900
User’s Guide
Analog Audio Interfaces
The NV8900 analog audio interfaces are larger, and more complex than, the AES interfaces
and provide a number of status LEDs:
The MADI-to-analog-audio interface is a demultiplexer that has two MADI inputs and 64
analog audio outputs (32 pairs). The outputs use 110
W
shielded twisted pairs on DB25
connectors.
The MADI-to-analog-audio interface interprets the incoming framing data and preserve
VUCP data.
The analog-audio-to-MADI interface is a multiplexer that has 64 analog audio inputs (32
pairs) and two MADI outputs. The inputs use 110
W
shielded twisted pairs on DB25
connectors.
The analog-audio-to-MADI interfaces generate VUCP and also generate the framing data
(in the first 4 bits of each MADI subframe).
The MADI inputs and outputs are 75
W
BNCs.
The analog-audio-to-MADI interface accepts 64 audio channels. The MADI-to-analog-audio
interface produces 64 audio channels. The MADI channels are paired on the analog inputs
or outputs.
There are 4 analog audio connector pairs on each of 8 DB25s at the rear of the unit, totalling
64 channels (or 32 channel pairs). Each channel corresponds to 3 pins on a DB25; each
channel pair corresponds to 6 pins. The analog channels are numbered consecutively on
the 8 DB25s: 1–8, 9–16, 17–24, and so on, up to 57–64. See
Analog Audio Connectors , on
page 22.
Each MADI unit has a video reference input (loop-through). Each interface has a serial port
(DE9) that is reserved for future use. Each interface has an Ethernet port (RJ-45) for a
connection to MRC (the Miranda Router Configurator).
Each unit has two power connectors (for PS0001 power supply) and a grounding terminal.
Each unit is 1RU and 17
″
in depth.