Belden Miranda NV8900 Series User manual

NV8900 Series
MADI Interfaces
User’s Guide
UG0056-02
30 Apr 2013

ii
Copyright © 2013 by Miranda Technologies
All rights reserved. No part of this manual may be reproduced in any form by photocopy,
microfilm, xerography or any other means, or incorporated into any information retrieval
system, electronic or mechanical, without the written permission of Miranda Technologies,
Inc..
• DocumentRevision:1.2
• Document Part Number: UG0056-02
• SoftwareVersion:-na-
Change History
Notice
Due to continued product development, the accuracy of the information in this document
may change without notice. The information and intellectual property contained herein is
confidential between Miranda and the client and remains the exclusive property of Miranda.
If you find any problems in the documentation, please report them to us in writing. Miranda
does not warrant that this document is error-free.
FCC Statement
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be required to correct the
interference at his own expense.
Declaration of Conformance (CE)
All of the equipment described in this manual has been designed to conform with the
required safety and emissions standards of the European Community. Products tested and
verified to meet these standards are marked as required by law with the CE mark.
When shipped into member countries of the European Community, this equipment is
accompanied by authentic copies of original Declarations of Conformance on file in Miranda
USA offices in Grass Valley, California USA.
Rev. Date ECO Description Approved
1.0 03 Feb 11 — Initial release. D.Cox
1.1 13 Apr 12 18179 Minor corrections.
Added the two analog audio models. Format change.
D.Cox
1.2 24 Apr 13 18826 Some corrections (p. 5) D.Cox

iii
NV8900 Series
User’s Guide
Trademarks
Miranda is a registered trademark of Miranda Technologies, Inc.
Brand and product names mentioned in this manual may be trademarks, registered
trademarks or copyrights of their respective holders. All brand and product names
mentioned in this manual serve as comments or examples and are not to be understood as
advertising for the products or their manufactures.
Software License Agreement and Warranty Information
Contact Miranda for details on the software license agreement and product warranty.
Important Safeguards and Notices
This section provides important safety guidelines for operators and service personnel.
Specific warnings and cautions appear throughout the manual where they apply. Please
read and follow this important information, especially those instructions related to the risk
of electric shock or injury to persons.
Restriction on Hazardous Substances (RoHs)
Miranda is in compliance with EU Directive RoHS 2002/95/EC governing the restricted use of
certain hazardous substances and materials in products and in our manufacturing
processes.
Miranda has a substantial program in place for RoHS compliance that includes significant
investment in our manufacturing process, and a migration of Miranda product electronic
components and structural materials to RoHS compliance.
It is our objective at Miranda GVD to maintain compliance with all relevant environmental
and product regulatory requirements. Detailed information on specific products or on the
RoHS program at Miranda is available from Miranda Customer Support at
1-800-719-1900 (toll-free) or
1-530-265-1000 (outside the U.S.).
WARNING
Any instructions in this manual that require opening the equipment cover or
enclosure are for use by qualified service personnel only. To reduce the risk of electric
shock, do not perform any service other than that contained in the operating
instructions unless you are qualified to do so.

iv
Symbols and Their Meanings
General Warnings
A warning indicates a possible hazard to personnel which may cause injury or death.
Observe the following general warnings when using or working on this equipment:
• Heed all warnings on the unit and in the operating instructions.
• Do not use this equipment in or near water.
• This equipment is grounded through the grounding conductor of the power cord. To
avoid electrical shock, plug the power cord into a properly wired receptacle before con-
necting the equipment inputs or outputs.
• Route power cords and other cables so they are not likely to be damaged.
• Disconnect power before cleaning the equipment. Do not use liquid or aerosol clean-
ers; use only a damp cloth.
• Dangerous voltages may exist at several points in this equipment. To avoid injury, do
not touch exposed connections and components while power is on.
• Do not wear rings or wristwatches when troubleshooting high current circuits such as
the power supplies.
• To avoid fire hazard, use only the specified fuse(s) with the correct type number, voltage
and current ratings as referenced in the appropriate locations in the service instruc-
tions or on the equipment. Always refer fuse replacements to qualified service person-
nel.
• To avoid explosion, do not operate this equipment in an explosive atmosphere.
• Have qualified service personnel perform safety checks after any service.
The lightning flash with arrowhead symbol within an equilateral triangle alerts the
user to the presence of dangerous voltages within the product’s enclosure that
may be of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle alerts the user to the presence
of important operating and maintenance/service instructions.
The ground symbol represents a protective grounding terminal. Such a terminal
must be connected to earth ground prior to making any other connections to the
equipment.
The fuse symbol indicates that the fuse referenced in the text must be replaced
with one having the ratings indicated.
The presence of this symbol in or on Miranda equipment means that it has been
designed, tested and certified as complying with applicable Underwriter’s Labora-
tory (USA) regulations and recommendations.
The presence of this symbol in or on Miranda equipment means that it has been
designed, tested and certified as essentially complying with all applicable Euro-
pean Union (CE) regulations and recommendations.

v
NV8900 Series
User’s Guide
General Cautions
A caution indicates a possible hazard to equipment that could result in equipment damage.
Observe the following cautions when operating or working on this equipment:
• When installing this equipment, do not attach the power cord to building surfaces.
• To prevent damage to equipment when replacing fuses, locate and correct the problem
that caused the fuse to blow before re-applying power.
• Use only the specified replacement parts.
• Follow static precautions at all times when handling this equipment.
• This product should only be powered as described in the manual. To prevent equip-
ment damage, select the proper line voltage on the power supply(ies) as described in
the installation documentation.
• To prevent damage to the equipment, read the instructions in the equipment manual
for proper input voltage range selection.
• Some products include a backup battery. There is a risk of explosion if the battery is
replaced by a battery of an incorrect type. Dispose of batteries according to instruc-
tions.
• Products that have (1) no on/off switch and (2) use an external power supply must be
installed in proximity to a main power output that is easily accessible.

vi

vii
1 Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Chapter Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
The PDF Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Terms, Conventions and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 NV8900 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
AES Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Analog Audio Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Analog Audio to MADI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Other LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Signal Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
MADI to Analog Audio Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Other LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
AES Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Analog Audio Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Misc. Topics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Obtaining Software and Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Channel Numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Audio Rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Reference Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Environmental Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Audio Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Serial Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Balanced AES Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Analog Audio Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table of Contents

viii
Table of Contents
Power Cord Retention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

1
Preface
Chapter 1 provides an introduction to the NV8900 Series User’s Guide.
Topics
Chapter Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
The PDF Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Terms, Conventions and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Chapter Structure
The following chapters provide information regarding the NV8900 MADI Interface:
•Chapter 1, Preface, (this chapter) tells you how to use this guide.
•Chapter 2, NV8900, describes the NV8900, from a user’s standpoint and from a technical
standpoint.
•Chapter 3, Misc. Topics, provides a connection, maintenance, and other information.
•Chapter 4, Specifications, presents the electrical, mechanical, and other specifications for the
NV8900.
An Index is also available for your reference.
The PDF Document
This guide is provided in PDF format, allowing you to use Acrobat’s “bookmarks” to navigate to
any desired location. You can also easily print a hardcopy. Please note:
•Use the Table of Contents or the bookmarks page to jump to any desired section.
•Many hyperlinks are provided within the chapters.
•Use the Index to jump to specific topics within a chapter. Each page number in the index is a
hyperlink.
•Use Acrobat’s ‘Go to Previous View’ and ‘Go to Next View’ buttons to retrace your complete
navigational path.
Use the ‘First Page’, ‘Previous Page’, and ‘Next Page’, and ‘Last Page’ buttons to go to the first,
previous, next, or last page within a PDF file.
•Use Acrobat’s extensive search capabilities, such as the ‘Find’ tool and ‘Search’ tool to per-
form comprehensive searches as required.
Note
To display the navigation buttons, right-click the Tool Bar area, and check ‘Navigation’.

2
Preface
Terms, Conventions and Abbreviations
Terms, Conventions and Abbreviations
The following conventions are used throughout this guide:
•The symbol Sdenotes either an example or a special message.
•Entries enclosed in single quotes denote the names of control panel buttons and knobs, or
menu items.
Choose ‘Aux’ to ...
Press ‘Keyer 2’ button ...

3
NV8900
Chapter 2 provides a functional description of the NV8900 Series interfaces.
Topics
AES Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Analog Audio Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
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
SBy 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 Analog Audio Interfaces on page 5.
AES Interfaces
The two MADI-to-AES interfaces are demultiplexers that have one MADI input and 32 AES
outputs. The unbalanced outputs use 75WBNCs; 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 75WBNCs; the balanced inputs use 110W shielded twisted pairs on
DB25 connectors.
The MADI inputs and outputs are 75 WBNCs.
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.

4
NV8900
AES Interfaces
This is a rear view of the AES (balanced) to MADI interface:
It has 4 DB25 connectors supporting the AES inputs. The MADI to AES (balanced) interface is
similar, except for the legend.
This is a rear view of the AES (coax) to MADI interface:
Here, there are 32 BNC connectors supporting the AES inputs. Here, too, the MADI to AES (coax)
interface is similar, except for the legend.
Functions
The AES models convert discrete AES signal pairs to MADI format or vice versa.
The MADI-to-AES interfaces interpret the incoming framing data and preserve VUCP data.
The AES-to-MADI interfaces preserve VUCP and also generate the framing data (in the first 4 bits
of each MADI subframe).
Each interface 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 interface has two power connectors (for PS0001 power supply) and a grounding terminal.
Rates
The MADI interfaces send and receive AES at exactly 48.0 kHz (samples per second).
Configuration
You can use MRC (Miranda Router Configurator) to change an NV8900’s IP address and also to
upload firmware.
The NV8900 has a 16-position rotary switch (Frame ID) on the front. This switch exists so that
different NV8900 frames can be distinguished (by MRC) on a network. The switch is not required
for operation.
Operation
The NV8900 AES interfaces function on their own and do not require an operator.
It is sufficient to rack-mount the devices and connect cables to your inputs and outputs.

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 110W 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 WBNCs.
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. Analog input connector 1 corresponds to MADI channels 0 and 1; analog input
connector 2 corresponds to MADI channels 2 and 3, and so on. Analog input connector 32 corre-
sponds to MADI channels 62 and 63. The same principle holds for output connectors.
SThere are 4 analog audio connector pairs on each of 8 DB25s at the rear of the unit, totalling
64 channels. See Analog Audio Connectors on page 22.
Each 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.

6
NV8900
Analog Audio Interfaces
Analog Audio to MADI Interface
This is a front view of the analog-audio-to-MADI interface:
This is a rear view of the analog-audio-to-MADI interface:
Function
The AA-to-MADI interface receives 64 analog audio inputs and produces two MADI outputs,
both identical. The second output is for redundancy.
The 64 inputs are paired internally and are represented by 32 LEDs at the front of the panel, one
for each pair. Each of these LEDs acts as a primitive level meter for the pair, according to the
following scale:
LED state Audio Level Range
Off < –50 dBfs
Green –50 to -4 dBfs
Red > –4 dBfs to 0 dBfs
The unit accepts video reference. It derives its internal clocks from the video reference. It can
free-run, but it is advisable to use an external reference, especially when used with an NV8500
hybrid router.
Other LEDs
Each MADI output is represented by an LED at the front of the unit. The LED is green when the
MADI output is good. Otherwise, the LED is off.
The reference signal is represented by an LED. This LED is green when the reference is good and
red when it is not.
An alarm LED is off under normal operation but turns red for the following conditions:
•Overtemperature
•MADI output failure
•Reference is bad or missing
Alarm LED
Ref. LED
Rotary Switch
Channel LEDs
P
ower
S
upp
l
y
LED
s
MADI LEDs
Video Reference
(Loop-Through)
Ethernet
Serial Analog Audio Inputs (DB25)
Fan
MADI Output (2)
DIP Switches
Power (2)

7
NV8900
User’s Guide
Signal Connectors
At the rear of the AA-to-MADI interface are signal connectors. There are 2 MADI outputs (BNCs),
two video reference connectors (BNC, loop-through), and 8 DB25s for analog audio input.
Each DB25 supports 8 analog audio inputs. The 8 inputs on a connector correspond to an
enclosed section of the labeling on the front of the unit. For instance, first DB25 connector is for
inputs 1 through 8 and the corresponding markings on the front of the unit are pair 1/2, 3/4, 5/6,
and 7/8.
The power connectors, serial port, and Ethernet port are described under Installation on
page 13.
Each power connection is represented by an LED at the front of the unit. When the LED is green,
its power supply circuit is good. If the LED is off, the power supply is bad.
The MADI outputs are identical.
The video reference connectors are “loop-through” allowing you to “daisy-chain” a reference
signal to multiple devices. See Reference Specifications on page 18.
DIP Switches
There are 8 DIP switches in a recess at the rear of the unit:
The first 3 switches control the overall audio level of the unit:
Switch Switch
321Level 321Level
000+24dBu 100+16dBu
001+22dBu 101+14dBu
010+20dBu 110+12dBu
011+18dBU 111+10dBu
Switches 4–7 are reserved for future use. It does not matter which way these switches are set.
Switch 8 is for factory testing. Leave it off.
1
ON
2345678
SDO8
CTRL
PS1
PS2
DC IN
+12V
E146905
ETHERNET
MADI OUT VID REF
CONFIG
41-48 49-56
ANALOG AUDIO
INPUTS
25-321 -249-161-8
5 -6433-40
Analog Inputs (DB25)
Video Reference
(Loop-Through)
MADI Output (2)
DIP Switches (8)
1
ON
2345678
SDO8
CONFIG

8
NV8900
Analog Audio Interfaces
MADI to Analog Audio Interface
This is a front view of the MADI-to-analog-audio interface:
This is a rear view of the MADI-analog-audio interface:
Function
The MADI-to-AA interface accepts one or two MADI input streams. If it receives two MADI
signals, they should be identical. Only one of the MADI streams is active. The other if it is present,
is stand-by. The stand-by input becomes active if the active input fails.
SA failure occurs when the active input has 1 or more bit errors per second for 3 seconds or
more and the stand-by input has no bit errors.
The unit extracts 64 audio channels From the active MADI stream.
The 64 outputs are paired internally and are represented by 32 LEDs at the front of the panel,
one for each pair. Each of these LEDs acts as a primitive level meter for the pair, according to the
following scale:
LED state Audio Level Range
Off < –50 dBfs
Green –50 to -4 dBfs
Red > –4 dBfs to 0 dBfs
The unit accepts video reference. It derives its internal clocks from the video reference. It can
free-run, but it is advisable to use an external reference, especially when used with an NV8500
hybrid router.
Alarm LED
Ref. LED
Rotary Switch
Channel LEDs
P
ower
S
upp
l
y
LED
s
MAD I LEDs
Video Reference
(Loop-Through)
Ethernet
Serial Analog Audio Outputs (DB25)
Fan
MADI Output (2)
DIP Switches
Power (2)

9
NV8900
User’s Guide
Other LEDs
Each MADI input is represented by an LED at the front of the unit. The color of the LED repre-
sents the state of the MADI input:
•Green—the MADI input is good and active.
•Amber (or orange)—the MADI input is good and stand-by (inactive).
•Red—the MADI input is bad.
SThese LEDs behave differently from those of the AA-to-MADI interface.
The reference signal is represented by an LED. This LED is green when the reference is good and
red when it is not.
An alarm LED is off under normal operation but turns red for the following conditions:
•Overtemperature
•MADI output failure
•Reference is bad or missing
Connectors
At the rear of the MADI-to-AA interface are signal connectors. There are 2 MADI outputs (BNCs),
two video reference connectors (BNC, loop-through), and 8 DB25s for analog audio input.
Each DB25 supports 8 analog audio outputs. The 8 outputs of a connector correspond to an
enclosed section of the labeling on the front of the unit. For instance, first DB25 connector is for
outputs 1–8 and the corresponding markings on the front of the unit are pair 1/2, 3/4, 5/6, and
7/8.
The power connectors, serial port, and Ethernet port are described under Installation on
page 13.
Each power connection is represented by an LED at the front of the unit. When the LED is green,
its power supply circuit is good, and when the LED is off, the power supply circuit is bad.
The MADI inputs are identical.
The video reference connectors are “loop-through” allowing you to “daisy-chain” a reference
signal to multiple devices. See Reference Specifications on page 18.
1
ON
2345678
SDO8
CTRL
PS1
PS2
DC IN
+12V
E146905
ETHERNET
MADI OUT VID REF
CONFIG
41-48 49-56
ANALOG AUDIO
INPUTS
25-321 -249-161-8
5 -6433-40
Analog Inputs (DB25)
Video Reference
(Loop-Through)
MADI Output (2)
DIP Switches (8)

10
NV8900
Installation
DIP Switches
There are 8 DIP switches in a recess at the rear of the unit:
The first 3 switches control the overall audio level of the unit:
Switch Switch
321Level 321Level
000+24dBu 100+16dBu
001+22dBu 101+14dBu
010+20dBu 110+12dBu
011+18dBU 111+10dBu
Switches 4–6 are reserved for future use. It does not matter which way these switches are set.
Switch 7, when it is OFF, enables both MADI inputs. When switch 7 is ON, only the primary MADI
input is enabled. (Switch 7 overrides the unit’s failover behavior. When the switch is ON, the unit
ignores the secondary input and the secondary MADI LED is dark.)
Switch 8 is for factory testing. Leave it off.
Installation
AES Interfaces
The AES interfaces are small and lightweight. It is sufficient to mount them in a 19” rack with
suitable screws.
Analog Audio Interfaces
The analog audio interfaces are large and somewhat heavy and require special hardware that
attaches to, and supports, the rear of the units. There are two metal pieces for each side of the
NV8900:
•ME1714-xx —an 8” extension plate, with screw holes, that attaches to the side of the
NV8900.
•ME1745-xx —a small (1.72”) metal plate that attaches to the rear frame posts.
1
ON
2345678
SDO8
CONFIG

11
NV8900
User’s Guide
The extension plates fit in the slots of the small plate, and the small plate supports the weight of
the NV8900, as shown:
The (4) metal plates, and screws, are attached to the NV8900 during shipment. Keep them in a
safe place until you are ready to install the NV8900.
The extension plates provide an additional 6.3” of depth, for a total extension of 22.64”. You can
adjust the position of the plate if your rack has less depth.
If your rack does not have rear posts, or if your rack is deeper than 22.64”, consider mounting the
NV8900 just above another device in the rack (say, a router). The other device then supports the
NV8900. Place a non-metal spacer (0.03”) between the NV8900 and the other device.
ME1714-xx
ME1745-xx
ME1714-xx
ME1745-xx
Attach to rear
rack posts.
(front of unit)

12
NV8900
Installation