Nv8900, Aes interfaces, 2 nv8900 – Grass Valley NV8900 Series v.1.3 User Manual
Page 11: Chapter 2, Descr, Topics
3
NV8900
Chapter 2 provides a functional description of the NV8900 Series interfaces.
Topics
The NV8900 product family includes 6 MADI interfaces:
•
MADI to AES, unbalanced
• AES to MADI, unbalanced
•
MADI to AES, balanced
• AES to MADI, balanced
•
MADI to analog audio
• Analog audio to MADI
By AES we mean AES-3 and by MADI we mean “multi-channel audio digital interface,”
governed by standard AES10-2003.
The two analog audio interfaces are quite different from the AES interfaces and are discussed
under
AES Interfaces
The two MADI-to-AES interfaces are demultiplexers that have one MADI input and 32 AES
outputs. The unbalanced outputs use 75
W BNCs; the balanced outputs use 110W shielded
twisted pairs on DB25 connectors.
The two AES-to-MADI interfaces are multiplexers that have 32 AES inputs and one MADI output.
The unbalanced inputs use 75
W BNCs; the balanced inputs use 110W shielded twisted pairs on
DB25 connectors.
The MADI inputs and outputs are 75
W BNCs.
The AES-to-MADI interfaces accept up to 64 audio channels. The MADI-to-AES interfaces
produce 64 audio channels. The individual MADI channels are paired on the AES inputs or
outputs. AES connector 1 corresponds to MADI channels 0 and 1; AES connector 2 corresponds
to MADI channels 2 and 3, and so on. AES connector 32 corresponds to MADI channels 62 and
63.
The AES interfaces are 1RU and about 2
″ in depth. The following photographs are
representative:
This is a front view of the AES (balanced) to MADI interface. The other AES units resemble this
one, where the difference between the models is the legend.