Leitch Neo AS-3901-B User manual

Delivering the Moment
Installaon and Operaon Manual
Neo® AS-3901-B and -C
Audio Synchronizers
Edion C
175-000084-00

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Environment

Edition C
May 2005
AS-3901-B and -C
Audio Synchronizers
Installation and Operation Manual

AS-3901-B and -C Installation and Operation Manual iii
Contents
Preface
Manual Information .............................................................................. vii
Purpose ........................................................................................... vii
Audience ........................................................................................ vii
Revision History ............................................................................ vii
Writing Conventions ..................................................................... viii
Obtaining Leitch Documents .......................................................... ix
Unpacking the Module .............................................................................x
Safety Standards and Compliances ........................................................ xi
Safety Terms and Symbols ............................................................. xi
Chapter 1: Introduction
Overview ..................................................................................................1
Product Description ..................................................................................2
Main Features ...................................................................................2
Front and Back Modules ..........................................................................3
Front Module ....................................................................................3
Back Modules ...................................................................................4
Plug-In Adapter .................................................................................5
Signal Flow ..............................................................................................6
Chapter 2: Installation and Removal
Overview ..................................................................................................7
Packing List ..............................................................................................8
Installing AS-3901-B and -C Modules ....................................................8
Removing AS-3901-B and -C Modules ...................................................8
Setting Jumpers ........................................................................................9
Upgrading AS-3901-B and -C Firmware ...............................................10

iv AS-3901-B and -C Installation and Operation Manual
Contents
Upgrading the Firmware (Discovery Method) ............................... 10
Upgrading the Firmware (Drag-and-Drop Method) ...................... 12
Correcting a Failed Upgrading Procedure ............................................. 14
Setting the Module to Fail-Safe Loader Mode ............................... 14
Upgrading the Firmware in Fail-Safe Mode .................................. 14
Rebooting the Module .................................................................... 16
Chapter 3: Operation
Overview ............................................................................................... 17
Operation Notes ..................................................................................... 18
PCM and Non-PCM Processing ............................................................ 19
PCM Processing ............................................................................. 20
Non-PCM Processing ..................................................................... 21
Cross-Functional Parameter Changes ................................................... 22
Navigating the Operator and All Lists .................................................. 23
Operator and All List Parameters .......................................................... 24
Setup Parameters ................................................................................... 26
Alarms ................................................................................................... 27
Alarm Synchronization .................................................................. 27
Identifying the Cause of an Alarm ................................................. 27
Enabling or Disabling an Alarm Parameter ................................... 28
Restoring Default Settings ............................................................. 28
State Recovery Parameter Availability ................................................. 28
LEDs and Indicators .............................................................................. 29
General Information ....................................................................... 29
Card-Edge LED Locations ............................................................. 30
LED Descriptions ........................................................................... 31
Module Indicator Descriptions ....................................................... 32
Chapter 4: Specifications
Overview ............................................................................................... 33
Input ...................................................................................................... 34
Balanced AES Input (-B Version Only) ........................................ 34
Unbalanced AES Input (-C Version Only) .................................... 34
Balanced DARS Input (-B Version Only) ..................................... 35
Unbalanced DARS Input (-C Version Only) ................................. 35
Output .................................................................................................... 36
Balanced AES Output (-B Version Only) ...................................... 36
Unbalanced AES Output (-C Version Only) .................................. 36

AS-3901-B and -C Installation and Operation Manual v
Contents
Miscellaneous .........................................................................................37
Propagation Delays .........................................................................37
Power Consumption ........................................................................37
Start-Up Time .................................................................................37
Appendix A: Tree View Navigation
Overview ................................................................................................39
Navigating the Tree View ......................................................................40
Tree View Parameters ............................................................................41
Appendix B: Audio Bit Manipulation
Overview ................................................................................................43
Channel Status Bits ................................................................................44
Validity and User Bits ............................................................................46
Miscellaneous Data ................................................................................46
Appendix C: Audio Embedding
Overview ................................................................................................47
Embedding Errors ..................................................................................48
Preventing Embedding Errors .........................................................48
Index
Keywords ...............................................................................................49

vi AS-3901-B and -C Installation and Operation Manual
Contents

AS-3901-B and -C Installation and Operation Manual vii
Preface
Manual Information
Purpose
This manual details the features, installation, operation, maintenance,
and specifications of the NEO™ AS-3901-B and -C Audio
Synchronizers.
Audience
This manual is written for engineers, technicians and operators
responsible for the installation, setup, maintenance, and operation of the
NEO AS-3901-B and -C Audio Synchronizers.
Revision History
Table P-1. Revision History
Edition Date Revision History
A February 2003 Initial release
B May 2004 Information updates
C May 2005 Revision of product codes, jumper
modifications, and template updates

viii AS-3901-B and -C Installation and Operation Manual
Preface
Writing Conventions
This manual adheres to the following writing conventions.
Table P-2. Writing Conventions
Term or Convention Description
Bold Indicates dialog box, property sheet, field,
button, check box, list box, combo box,
menu, submenu, window, list, and
selection names
Italics Indicates email addresses, names of books
and publications, and first instances of new
terms and specialized words that need
emphasis
CAPS Indicates a specific key on the keyboard,
such as ENTER, TAB, CTRL, ALT,
DELETE
Code Indicates variables or command-line
entries, such as a DOS entry or something
you type into a field.
> Indicates the direction of navigation
through a hierarchy of menus and
windows.
hyperlink Indicates a jump to another location within
the electronic document or elsewhere
Internet address Indicates a jump to a Web site or URL
Note
Indicates important information that helps
to avoid and troubleshoot problems

AS-3901-B and -C Installation and Operation Manual ix
Preface
Obtaining Leitch Documents
Installation, navigation, configuration, and setup information is now
included in the NEO FR-3901, FR-3903, and FR-3923 Mounting
Frames Installation and Operation Manual. If your current NEO frame
manual is Edition A, B, C, or D, you will need to download an updated
version from the Leitch Web site to access this information.
Leitch documents can be viewed or downloaded from the Leitch Web
site at www.leitch.com (go to Support>Documentation).
Alternatively, contact your Leitch customer service representative to
request a document.

x AS-3901-B and -C Installation and Operation Manual
Preface
Unpacking the Module
Before you install and configure NEO modules, follow these steps:
1. Check the equipment for any visible damage that may have
occurred during transit.
2. Confirm that you have received all items listed on the packing list.
3. Remove the anti-static shipping pouch, if present, and all other
packaging material.
4. Retain the original packaging materials for possible reuse.
5. Contact your Leitch sales representative if parts are missing or
damaged.
Keep at least one set of original packaging in the event that a product
needs to be returned for service. If the original package is not available,
you can purchase replacement packaging from Leitch Technology.
Otherwise, you can supply your own packaging as long as it meets the
following criteria:
• The packaging must be able to withstand the product’s weight.
• The product must be held rigid within the packaging.
• There must be at least two inches (five centimeters) of space
between the product and the container.
• The corners of the product must be protected.
If the product is still within the warranty period, Leitch Technology will
return it to you by prepaid shipment after servicing.

AS-3901-B and -C Installation and Operation Manual xi
Preface
Safety Standards and Compliances
See the NEO Safety Instructions and Standards Manual to find the
safety standards and compliances for this NEO series product. A safety
manual is shipped with every FR-3901, FR-3903, and FR-3923
Mounting Frames Installation and Operation Manual and can be
downloaded from the Leitch Web site at www.leitch.com. Alternatively,
contact your Leitch customer service representative for a copy of this
safety manual.
Safety Terms and Symbols
This manual uses the following safety terms and symbols. See your
NEO Safety Instructions and Precautions Guide for more information.
Table P-3. Safety Terms and Symbols Used in Manual
WARNING:
Statements identifying conditions or practices that can result in
personal injury or loss of life: High voltage is present. Uninsulated
dangerous voltage within the product’s enclosure may be sufficient
to constitute a risk of electric shock to persons.
CAUTION:
Statements identifying conditions or practices that can result in
damage to the equipment or other property: Important operating
and maintenance (servicing) instructions in the literature
accompanying the product.

xii AS-3901-B and -C Installation and Operation Manual
Preface

AS-3901-B and -C Installation and Operation Manual 1
Chapter 1
Introduction
Overview
The NEO AS-3901-B and -C Audio Synchronizers are designed for use
in NEO FR-3901 and FR-3903 rack-mounted frames.
This chapter covers the following topics:
•“Product Description” on page 2
•“Front and Back Modules” on page 3
•“Signal Flow” on page 6
See the FR-3901, FR-3903, and FR-3923 Installation and Operation
Manual for information about NEO frames. The frame manual includes
information about these items:
• General information about module unpacking, installation,
removal, navigation, configuration, and setup
• Card-edge screen savers
• State recovery parameters
• Fan modules
• Resource modules
• Alarm interconnect modules
• Power supplies
• Servicing instructions
Note
Installation, navigation, config-
uration, and setup information is
now included in the NEO
FR-3901, FR-3903, and
FR-3923 Mounting Frames
Installation and Operation
Manual. If your current NEO
frame manual is Edition A, B,
C, or D, you will need to down-
load an updated version from
the Leitch Web site
(www.leitch.com) to access this
information.

2 AS-3901-B and -C Installation and Operation Manual
Chapter 1: Introduction
Product Description
AS-3901-B and -C modules are audio synchronizers, supporting two
AES audio inputs, and two AES processed synchronized audio outputs
in balanced (AS-3901-B) and unbalanced (AS-3901-C) formats.
Table 1-1 describes the two modules.
Main Features
These are the main features of the AS-3901-B and -C modules:
• Two AES input channels
• Two AES output channels
• Unbalanced DARS input (additional balanced input on the
AS-3901-B version, jumper-selectable)
• Internal audio processing amplifier
•Audiodelay
• Audio tracking capability
• Selectable silence for all audio channels
• Selectable 16-, 20-, and 24-bit audio processing
• Audio re-sampling for 32 to 108 kHz AES outputs, with bypass for
data over AES operation
• C-bit, U-bit, and V-bit transparency
• Compressed data pass
• Capability for control via card edge
Table 1-1. Product Description
Input Output AS-3901
Product
Two-channel AES digital audio (110Ω) Two-channel AES processed synchronized
digital audio (110Ω)
AS-3901-B
Two-channel AES digital audio (75Ω)Two-channel AES processed synchronized
digital audio (75Ω)
AS-3901-C

AS-3901-B and -C Installation and Operation Manual 3
Chapter 1: Introduction
Front and Back Modules
Front Module
Figure 1-1 illustrates the position of the LEDs on the front modules of
the AS-3901-B and -C modules. Front modules are designated by the
suffix “-FM.” For example, the front module of the AS-3901-B is the
“AS-3901-B-FM.”
Figure 1-1. Card-Edge Controls of AS-3901-B-FM and -C-FM Front Modules

4 AS-3901-B and -C Installation and Operation Manual
Chapter 1: Introduction
Back Modules
In the NEO frame, back modules are placed directly behind the front
modules. Back modules are designated by the suffix “-BM.” For
example, the back module of the AS-3901-B is the “AS-3901-B-BM.”
The AS-3901-B-BM (Figure 1-2) and the AS-3901-C-BM (Figure 1-3)
back modules are shown below.
Figure 1-2. AS-3901-B-BM Back Module
Figure 1-3. AS-3901-C-BM Back Module
Back Module Pinouts
Figure 1-4 shows the pinouts for the Balanced AES In/Out DARS Input
connector on the AS-3901-B-BM back module.
.
Figure 1-4. Pinouts on the AS-3901-B -BM Back Module
INPUT
DARS
AS-3901-B
BALANCED AES IN/OUT DARS INPUT
INPUT
DARS
OUT 1
AES
OUT 2
AES
IN 1
AES
IN 2
AES

AS-3901-B and -C Installation and Operation Manual 5
Chapter 1: Introduction
Plug-In Adapter
The balanced back module (AS-3901-B-BM) is shipped with a
detachable plug-in adapter (AIB-25-3901MF) for connecting twisted
pair audio cables directly to the back module. Figure 1-5 illustrates the
pinouts and screw terminals for the plug-in adapter module and the
back module.
Figure 1-5. Balanced Input/Output Connections
Note
The AIB-25-3901MF is a
universal adapter. Some
terminals on this adapter are not
used with the AS-3901-B-BM
back module.