NSM-8×1AES/NSM-7×2AES Installation and Operation Manual
7
Chapter 1: Introduction
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
The NSM matrix module name consists of two separate components,
which represent the NEO part designation and the module type:
AES Digital Audio Main Switch Module
The NSM-8×1AES input module accepts a total of 8 input signals from
the back module, plus 1 reference input. These inputs are processed and
switched, then driven out the back module.
The NSM-7×2AES input module accepts a total of 7 input signals from
the back module, plus 1 reference input. These inputs are processed and
switched, then driven out the back module.
Processor Block
The NSM-8×1AES/NSM-7×2AES uses a Phillips 89C662
microprocessor (an 8052 derivative).
FPGA
The FPGA performs all switching functions on the module. Through
the AES reference receiver, the FPGA aligns all input signals to the
reference in synchronous mode. Provided that all inputs are locked to
this AES reference, the FPGA ensures that switching occurs at the
beginning of the AES preamble, which prevents data corruption and
loss of lock in downstream equipment. In addition, all input signals are
buffered and regenerated based on the reference, which eliminates input
jitter. When an NTSC or PAL video reference is used, the FPGA
ensures that switching is performed in the vertical blanking interval.
Power Requirements
The NSM-8×1AES/NSM-7×2AES module re24 volts input
power, which is provided by the frame power supply.
Table 1-1.
NSM Matrix Module Name Components
Module Name
NEO Part
Designation
Module Type
NSM-8x1AES-FM
NSM-7x2AES-FM
NSM
AES main switch module
NSM-8x1AESBBM
NSM-7x2AESBBM
NSM
AES digital audio input/output
module (balanced AES audio)
NSM-8x1AESCBM
NSM-7x2AESCBM
NSM
AES digital audio input/output
module (coax AES audio)
