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Neo AS-3901-B
Installation And Operation Manual
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Leitch Neo AS-3901-B, Neo AS-3901-C Installation And Operation Manual

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Installaon and Operaon Manual
Neo® AS-3901-B and -C
Audio Synchronizers
Edion C
175-000084-00
Delivering the Moment
Publicaon Informaon
© 2014 Imagine Communicaons Corp. Proprietary and Condenal.
This publicaon is designed to assist in the use of the product as it exists on the date of publicaon of this manual, and may not reect the product at the current me or an unknown me in the future. This publicaon does not in any way warrant descripon accuracy or guarantee the use for the product to which it refers. Imagine Communicaons reserves the right, without noce to make such changes in equipment, design, specicaons, components, or documentaon as progress may warrant to improve the performance of the product.
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© 2014 Imagine Communicaons Corp. Proprietary and Condenal
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AS-3901-B and -C
Audio Synchronizers
Installation and Operation Manual
Edition C May 2005

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
AS-3901-B and -C Installation and Operation Manual iii
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
iv AS-3901-B and -C Installation and Operation Manual
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
Contents
Index
Keywords ...............................................................................................49
AS-3901-B and -C Installation and Operation Manual v
Contents
vi AS-3901-B and -C Installation and Operation Manual

Manual Information

Purpose

This manual details the features, installation, operation, maintenance, and specifications of the NEO™ AS-3901-B and -C Audio Synchronizers.

Preface

Audience

Revision History

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

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 Alternatively, contact your Leitch customer service representative to request a document.
Preface
(go to Support>Documentation).
AS-3901-B and -C Installation and Operation Manual ix
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.
x AS-3901-B and -C Installation and Operation Manual

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 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.
Preface
. Alternatively,
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.
AS-3901-B and -C Installation and Operation Manual xi
Preface
xii AS-3901-B and -C Installation and Operation Manual

Overview

Chapter 1

Introduction

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:
Note
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 (www.leitch.com information.
) to access this
• “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
AS-3901-B and -C Installation and Operation Manual 1
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.
Table 1-1. Product Description
Input Output
Two-channel AES digital audio (110Ω) Two-channel AES processed synchronized
digital audio (110Ω)
Two-channel AES digital audio (75Ω) Two-channel AES processed synchronized
digital audio (75Ω)

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
•Audio delay
• Audio tracking capability
• Selectable silence for all audio channels
• Selectable 16-, 20-, and 24-bit audio processing
AS-3901 Product
AS-3901-B
AS-3901-C
• 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
2 AS-3901-B and -C Installation and Operation Manual

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.”
Chapter 1: Introduction
Figure 1-1. Card-Edge Controls of AS-3901-B-FM and -C-FM Front Modules
AS-3901-B and -C Installation and Operation Manual 3
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.
INPUT DARS
BALANCED AES IN/OUT DARS INPUT
Figure 1-2. AS-3901-B-BM Back Module
INPUT DARS
OUT 1
AES
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.
.
OUT 2
AES
IN 1 AES
AS-3901-B
IN 2
AES
Figure 1-4. Pinouts on the AS-3901-B -BM Back Module
4 AS-3901-B and -C Installation and Operation Manual

Plug-In Adapter

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.
Chapter 1: Introduction
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
AS-3901-B and -C Installation and Operation Manual 5
Chapter 1: Introduction

Signal Flow

Figure 1-6 illustrates the signal flow for the AS-3901-B and -C
modules.
Figure 1-6. Functional Block Diagram of the AS-3901-B and -C Modules
6 AS-3901-B and -C Installation and Operation Manual

Overview

Caution
Before installation, please read the NEO Safety Instructions and Precautions Manual. This docu­ment contains important infor­mation about the safe installation and operation of NEO products.
Chapter 2

Installation and Removal

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 (www.leitch.com information.
In this chapter, you can find information on the following topics:
• “Packing List” on page 8
) to access this
• “Installing AS-3901-B and -C Modules” on page 8
• “Removing AS-3901-B and -C Modules” on page 8
• “Setting Jumpers” on page 9
• “Upgrading AS-3901-B and -C Firmware” on page 10
• “Correcting a Failed Upgrading Procedure” on page 14
AS-3901-B and -C Installation and Operation Manual 7
Chapter 2: Installation and Removal

Packing List

Each AS-3901-B and AS-3901-C module package includes these items:
• One AS-3901-B-FM or AS-3901-C-FM front module
• One AS-3901-B-BM or AS-3901-C-BM back module
• One AIB-25-3901MF plug-in adapter (AS-3901-B only)
•One AS-3901-B and -C Audio Synchronizers Installation and Operation Manual per order

Installing AS-3901-B and -C Modules

This module requires no specialized installation procedures. For general information about installing NEO modules, see your NEO FR-3901,
FR-3903, and FR-3923 Mounting Frames Installation and Operation Manual.
For information on audio tracking pairs, and installing cooperative modules together, see “” on page 16.

Removing AS-3901-B and -C Modules

This module requires no specialized removal procedures. For general information about removing NEO modules, see your NEO FR-3901,
FR-3903, and FR-3923 Mounting Frames Installation and Operation Manual.
8 AS-3901-B and -C Installation and Operation Manual

Setting Jumpers

Two jumpers, labelled J8 and J9, are located near the rear of the AS-3901-B-FM and AS-3901-C-FM front modules. A triangle symbol beside the jumpers indicates Pin 1.
See Table 2-1 for the position of the jumpers on the module.
Table 2-1. J8 and J9 Jumper Positions
Balanced DARS input Both jumpers set to Pins 1 and 2
Unbalanced DARS input Both jumpers set to Pins 2 and 3
Figure 2-1 illustrates the position of the jumpers on the module
Chapter 2: Installation and Removal
J8 and J9 Jumpers
Figure 2-1. Position of Jumpers J8 and J9
AS-3901-B and -C Installation and Operation Manual 9
Chapter 2: Installation and Removal

Upgrading AS-3901-B and -C Firmware

Firmware upgrading is a routine procedure that you must perform to install newer versions of software on the AS-3901-B and -C modules. Pilot, Co-Pilot, or Navigator software applications are required for this procedure. You can use either the Discovery or the drag-and-drop method. When performing the upgrading procedure, check the appropriate readme file to confirm which files are needed. Use care to ensure that you upload the correct files to the intended module.
If for some reason the upgrade fails, the module may not respond to controls and will appear to be non-functional. In that event, follow the procedures described in “Correcting a Failed Upgrading Procedure” on
page 14.

Upgrading the Firmware (Discovery Method)

Follow these steps to upgrade the firmware using the Discovery method:
1. Download the most recent appropriate upgrade package from the Leitch Web site or from your CD-ROM, and then unzip the upgrade package.
2. If the affected module has not been discovered, perform the Discovery operation, as described in your CCS software application manual or online help.
3. Double-click the device icon.
The Configuration... window opens. On the Software Upgrade tab, the /slotx/boot (where x is the slot number) directory appears in the Select the device directory to transfer to: field.
4. Click Add, and in the Add Upgrade Files box, browse and select the boot folder in the module’s upgrade; click OK.
The Add Upgrade Files box appears.
5. Select the file and then click OK.
6. Click Perform Transfer and then click Ye s.
This may take several minutes.
7. Wait for the message File transfer to device succeeded in the status bar.
10 AS-3901-B and -C Installation and Operation Manual
Caution
You must delete unwanted files in the Add upgrade files for transfer to device: field before transferring the files. Otherwise, the upgrading procedure will fail.
Chapter 2: Installation and Removal
If an fl0 folder is included in the .zip file, the files within that folder must now be uploaded as shown below. (In some cases, the readme file may indicate other separate files must be uploaded instead.)
Follow these steps to upload the remaining files:
1. On the Software Upgrade tab, select the /slotx/fl0 (where x is the
slot number) directory in the Select the device directory to transfer to: field.
2. Click Add, and in the Add Upgrade Files box, browse and select
the fl0 folder in the module’s upgrade package.
3. Click OK.
4. Select the files shown in the Add Upgrade Files box, and then
click OK.
5. Select and delete unwanted files (for example: vxWorks.lzs) in the
Add upgrade files for transfer to device: field by clicking Remove.
6. Click Perform Transfer and then click Ye s.
7. Wait for the message File transfer to device succeeded.
This may take a moment.
8. Click Reboot Device and then click Ye s.
9. Wait 30 seconds, and then close the Configuration... box.
The module name appears at the card edge.
AS-3901-B and -C Installation and Operation Manual 11
Chapter 2: Installation and Removal

Upgrading the Firmware (Drag-and-Drop Method)

Follow these steps to upgrade the firmware using the drag-and-drop method:
1. Download the appropriate most recent upgrade package from the Leitch Web site or from your CD-ROM, and then unzip the upgrade package.
2. If the affected module has not been discovered by your CCS software application, enter the Build mode, and then drag or copy and paste the module’s device icon from the catalog folder into the Network or Discovery folder.
3. Right-click the device icon and then select Properties.
4. On the NRO or Device tab of the Navigation Properties box, enter the IP address of the frame that holds the module. (See Figure 2-2.)
Caution
Do not make changes in the third field (located above and to the right of the Set Default button.)
Enter frame IP number here
Do not make changes in this field
Figure 2-2. Navigation Properties Box
5. In the last field, enter the slot number of the module, and then close the window.
6. Double-click the device icon.
The Configuration... window opens. On the Software Upgrade tab, the /slotx/boot (where x is the slot number) directory appears in the Select the device directory to transfer to: field.
7. Click Add, and in the Add Upgrade Files box, browse and select the boot folder in the module’s upgrade.
12 AS-3901-B and -C Installation and Operation Manual
Chapter 2: Installation and Removal
8. Click OK.
The Add Upgrade Files box appears.
9. Select the file and then click OK.
10. Click Perform Transfer and then click Ye s.
This may take several minutes.
11. Wait for the message File transfer to device succeeded in the
status bar.
If an fl0 folder is included in the .zip file, the files within that folder must now be uploaded as shown below. (In some cases, the readme file may indicate other separate files must be uploaded instead.)
Follow these steps to upload the remaining files:
1. On the Software Upgrade tab, select the /slotx/fl0 (where x is the
slot number) directory in the Select the device directory to transfer to: field.
2. Click Add, and in the Add Upgrade Files box, browse and select
the fl0 folder in the module’s upgrade package.
Caution
You must delete unwanted files in the Add upgrade files for transfer to device: field before transferring the files. Otherwise, the upgrading procedure will fail.
3. Click OK.
4. Select the files shown in the Add Upgrade Files box, and then
click OK.
5. Select and delete unwanted files (for example: vxWorks.lzs) in the
Add upgrade files for transfer to device: field by clicking Remove.
6. Click Perform Transfer and then click Ye s.
7. Wait for the message File transfer to device succeeded.
This may take a moment.
8. Click Reboot Device and then click Ye s.
9. Wait 30 seconds and then close the Configuration... box.
The module name appears at the card edge.
AS-3901-B and -C Installation and Operation Manual 13
Chapter 2: Installation and Removal

Correcting a Failed Upgrading Procedure

Firmware upgrades may fail in the event of network interruptions, power failures, or if too much data is uploaded to the NEO module. Often, uploads of too much data can occur for one of the following reasons:
• The boot file (typically vxWorks.lzs) was accidentally uploaded during the fl0 procedure, instead of the boot procedure.
• Files were sent to the wrong NEO module.
• The particular hardware version of the module requires only some (but not all) of the available fl0 files.
• The upgrade .zip file was mistakenly sent to the module.
All of these problems can be corrected by re-installing the firmware while in a fail-safe mode, as described in the following pages. When you are performing this procedure, check the appropriate readme file to confirm which files are needed. Use care to ensure that you upload the correct files to the intended module.

Setting the Module to Fail-Safe Loader Mode

Follow these steps to set a NEO module to the fail-safe loader mode:
1. Remove the affected module from the NEO frame.
2. Press the Nav switch down while simultaneously pressing both the Escape and Enter buttons.
3. While still pressing the buttons and the navigation switch, reinsert the module into the frame and hold for approximately three seconds until the display on the module reads Offline-H (or Offline-L) Upload Required.

Upgrading the Firmware in Fail-Safe Mode

Follow these steps to upgrade the firmware in the fail-safe mode:
Note
To successfully upgrade the firmware, you must follow these steps in the exact sequence described.
1. Download the most recent appropriate upgrade package from the Leitch Web site or from your CD-ROM, and then unzip the upgrade package.
14 AS-3901-B and -C Installation and Operation Manual
Chapter 2: Installation and Removal
2. If the affected module has not been discovered by your CCS
software application, enter the Build mode, and then drag or copy and paste the module’s device icon from the catalog folder into the Network or Discovery folder.
3. Right-click the device icon and then select Properties.
4. On the NRO or Device tab of the Navigation Properties box, enter
the IP address of the frame that holds the module. (See Figure 2-3.)
Caution
Do not make changes in the third field (located above and to the right of the Set Default button.)
Enter frame IP number here
Do not make changes in this field
Figure 2-3. Navigation Properties Box
5. In the last field, enter the slot number of the module, and then close
the window.
6. Double-click the device icon.
The Configuration... box opens. On the Software Upgrade tab, the /slotx/boot (where x is the slot number) directory appears in the Select the device directory to transfer to: field.
7. Click Add, and in the Add Upgrade Files box, browse and select
the boot folder in the module’s upgrade.
8. Click OK.
9. Select the file and then click OK.
10. Click Perform Transfer and then click Ye s.
This may take several minutes.
11. Wait for the message File transfer to device succeeded in the
status bar.
AS-3901-B and -C Installation and Operation Manual 15
Chapter 2: Installation and Removal

Rebooting the Module

Follow these steps to reboot the affected NEO module:
Note
Some NEO modules will reboot automatically. In these cases, the Reboot button will be grayed out. During this time, the module’s card-edge display will show the word Rebooting before the name of the module appears. These modules do not require the fl0 file.
Caution
You must delete unwanted files in the Add upgrade files for transfer to device: field before transferring the files. Otherwise, the upgrading procedure will fail.
1. Click Reboot Device, and then click Ye s.
After the module has rebooted, a message box advises you to wait until the device has rebooted.
2. Wait 30 seconds.
3. On the Software Upgrade tab, select the /slotx/fl0 (where x is the slot number) directory in the Select the device directory to transfer to: field.
4. Click Add, and then browse and select the fl0 folder in the module’s upgrade package.
5. Click OK.
6. Select the files shown in the Add Upgrade Files box, and then click OK.
7. Select and delete unwanted files (for example: vxWorks.lzs) in the
Add upgrade files for transfer to device: field by clicking Remove.
8. Click Perform Transfer and then click Ye s.
9. Wait for the message File transfer to device succeeded.
This may take a moment.
10. Click Reboot Device and then click Ye s.
11. Wait 30 seconds, and then close the Configuration... box.
The module name appears at the card edge.
16 AS-3901-B and -C Installation and Operation Manual

Overview

Chapter 3

Operation

This chapter describes how to operate the AS-3901-B and -C modules using card-edge controls.
The following topics are found in this chapter:
• “Operation Notes” on page 18
• “Cross-Functional Parameter Changes” on page 22
• “Navigating the Operator and All Lists” on page 23
• “Operator and All List Parameters” on page 24
• “Setup Parameters” on page 26
• “Alarms” on page 27
• “State Recovery Parameter Availability” on page 28
• “LEDs and Indicators” on page 29r
AS-3901-B and -C Installation and Operation Manual 17
Chapter 3: Operation

Operation Notes

When using the AS-3901-B or AS-3901-C modules, observe the
Note
If you do not observe these “Operation Notes,” you may accidentally change your parameter settings.
following operation notes:
• If you change parameters within 16 seconds after the AS-3901
• Although the effect of a parameter change may appear to be
• When you set the FctryRcl (factory recall) parameter to Yes , the
banner first appears on the VFD, your changes will not be saved. Parameter changes that you make after this 16-second delay will be saved and restored if the module loses power and must be restarted.
immediate, the module requires 20 seconds to save the latest change. If another change is made during these 20 seconds, the first parameter change and the second parameter change will not be saved until 20 seconds after the second parameter change. There is no limit to the number of changes that can be made within 20 seconds of each other. However, none of these changes will be saved until 20 seconds after the last parameter change.
module takes several seconds to reset all of the parameters. (Setup parameters are not affected by this factory recall mode.) The lists of
“Operator and All List Parameters” on page 24 and “Tree View Parameters” on page 41 indicate parameter default settings that are
restored when FctryRcl is set to Ye s .
• With some parameters, certain changes will cause additional changes in other parameters. See page 22 for more information on these cross-functional parameter changes.
18 AS-3901-B and -C Installation and Operation Manual

PCM and Non-PCM Processing

On the AS-3901-B and -C modules, the AESxFormat parameters provide the ability to select either PCM or Non-PCM as input formats. When PCM is selected, the following input sources are available selections for each OutxSrc parameter:
•AES1a
•AES1b
•AES2a
•AES2b
•Mute
•AES1 Sum
•AES2 Sum
However, if Non-PCM is selected for one of the AESxFormat parameters, its summation (AESxSum) is not a valid selection. For example, if AES2Format is set to Non-PCM, AES2Sum is not a valid selection. The handling of this selection is described on page 21.
Chapter 3: Operation
AS-3901-B and -C Installation and Operation Manual 19
Chapter 3: Operation

PCM Processing

Mute
AES1
AES2
AES1a
AES1b
AES2a
AES2b
In PCM processing, if the selected source is AES1 Sum or AES2 Sum, the result is the sum of the two parts of the AES channel, divided by two.
For example:
AES1 Sum = (AES1a + AES1b)
³ 2
Thus, a stereo pair is averaged out, creating a mono signal.
See Figure 3-1 for an illustration of this process.
.
AES04out
AES03out
AES02out
AES01out
AES2
AES1
AES1
AES2
AES1a (A+B)/2
AES1b
AES2a
AES2b
(A+B)/2
AES1sum
AES2sum
PCM Operation
Figure 3-1. PCM Processing of the Audio Signal
20 AS-3901-B and -C Installation and Operation Manual

Non-PCM Processing

Compressed non-PCM audio signals cannot be summed and averaged out. Therefore, if you have selected one of these options, the sources that appear in the Out01Src to Out04Src parameters are arbitrarily matched odd/even to left/right.
In the non-PCM mode of operation, audio sample rate conversion cannot be performed. Therefore, in this mode the audio synchronizer is forced to operate as an audio delay line only.
See Figure 3-2 for an example of non-PCM processing.
Mute
AES1
AES2
AES1
AES1a
AES1b
AES2a
AES2b
AES1
AES1b
AES1a
AES1 b AES1sum
AES1sumAES1a
AES1sum
AES1sum
Chapter 3: Operation
AES04out
AES03out
AES02out
AES01out
AES2
AES1
AES2sum
AES2sum
AES2sumAES2a
AES2
AES2
AES2b
AES2a
AES2 b AES2sum
Non-PCM Operation
Figure 3-2. Non-PCM Processing of the Audio Mux Signal
AS-3901-B and -C Installation and Operation Manual 21
Chapter 3: Operation

Cross-Functional Parameter Changes

When you select values in certain specific parameters, you force changes to occur in other parameters. The following table describes forced settings and disabled parameters that result when certain audio parameters changes are made.
Table 3-1. Cross-Functional Parameters
Condition Forced Setting Disabled Parameters
AES1Format = Non-PCM
AES2Format = Non-PCM
• Gain_1A = 0
• Gain_1B = 0
• Invert1A = No
•Invert1B = No
• Gain_2A = 0
• Gain_2B = 0
• Invert2A = No
•Invert2B = No
• Gain_1A
• Gain_1B
•Invert1A
•Invert1B
• Gain_2A
• Gain_2B
•Invert2A
•Invert2B
22 AS-3901-B and -C Installation and Operation Manual

Navigating the Operator and All Lists

To navigate, and then view or change a parameter from the Operator and All Lists, follow these steps:
1. Open the front panel of the NEO frame.
2. Press any card-edge control to turn on the VFD screen.
The message AS-3901-B or AS-3901-C appears. If a previous user has left the display at a different parameter name, repeatedly press the Escape button until the message AS-3901-B or AS-3901-C appears.
3. Push the Enter button.
Note
After several seconds of inactivity, a scrolling message will appear, describing the purpose of the currently selected parameter.
The name of the first parameter option in the list appears.
4. Push the Enter button again to access the options for the parameter
displayed on the VFD screen.
OR
Press the Nav+/Nav- switch down repeatedly to view other parameters, and then press Enter to access an item’s parameter options.
Chapter 3: Operation
5. Press the Nav+/Nav- switch up or down to scroll through the
different selectable parameter options, and then press Enter to select the value you want.
OR
Press the Nav+/Nav- switch up or down to adjust the numeric parameter value, and then press Enter.
6. Close the front panel of the frame to ensure the cooling system
continues to operate properly.
AS-3901-B and -C Installation and Operation Manual 23
Chapter 3: Operation

Operator and All List Parameters

This complete list of parameter settings is arranged so that the settings
Note
You can reset the default values for all of the parameters automatically via the FctryRcl parameter, found in this table.
Table 3-2. Operator and All List Parameters
most likely requiring changes are placed at the top of the list. Items on the bottom of the list are the least likely to require changing. Parameters with the designation [RO] are “read-only.” An asterisk (*) indicates the default user range or value.
The All List is a long flat list of all the available parameters, arranged from the most-used to least-used. It is intended for a “Supervisor” security designation. The Operator List is a condensed version of the All List, and is intended for an “Operator” security designation. The following table shows all available parameters. Parameters accessed only from within the All List are shaded in gray.
See “Navigating the Operator and All Lists” on page 23 for instructions on navigating this list using card-edge controls.
Card-Edge ID
AES_Prsnt [RO] AES1 to AES2 In
AES1Format to AES2Format
Delay_1A, Delay_1B, Delay_2A, Delay_2B
Gain_1A, Gain_1B, Gain_2A, Gain_2B
DitherMode Output Dither
Parameter Name
present
AES1 In to AES2 In data format
Delay: AES1a to Delay: AES2b
Gain: AES1a to Gain: AES2b
Mode
Function User Range
Detects the presence of signal at inputs 1 to inputs 2
Selects the input format for data inputs 1 to input 2
Adjusts the delay for AES1a channel to AES2b channel
Adjusts the gain for AES1a channel through to AES2b channel
Selects the Dithering Mode for all outputs
•==
•1=
•=2
•12
•PCM*
• Non-PCM
0* to 1320.00 msec
-18.0 to +18.0 dB (0 dB*)
• None*
•On
24 AS-3901-B and -C Installation and Operation Manual
Table 3-2. Operator and All List Parameters (Continued)
Chapter 3: Operation
Card-Edge ID
Invert1A, Invert1B, Invert2A, Invert2B
Out01Src to Out04Src
Out01_DR to Out04_DR
FadeRate Fade rate Controls the rate of fading when channels
DnBusEn Down bus enable Allows passing of signals to downstream
Parameter Name
Invert: AES1a to Invert: AES2b
Out 01 to Out 04 source select
Out 01 to Out04 dither resolution input
Function User Range
Inverts the AES1a channel through to AES2b channel
Selects the source for output channels 01 to output channel 04
Selects the dithering resolution for output channels 01 to 04
are swapped or muted
card for concatenated function
•No*
•Yes
•AES1a*
•AES1b*
•AES2a*
•AES2b*
•Mute
•AES1 Sum
•AES2 Sum
• 24-bit
• 20-bit*
• 16-bit
0 to 10 sec. (0.010 s*)
•No*
•Yes
DARSPrsnt
DARSLock
FctryRcl Factory recall Recalls the factory setting
Setup Setup Parameters Sets the parameters for display and usability
AS-3901-B and -C Installation and Operation Manual 25
[RO] DARS signal
present
[RO] DARS lock to
reference
Returns the presence of input DARS signal
Returns the locking status of DARS Input with respect to external reference video signal
(see Appendix A: “Tree View Navigation”
on page 39 for a complete list of Setup
parameters and factory default settings)
•No
•Yes
•No Lock
•Locked
•No*
•Yes
Various
Chapter 3: Operation

Setup Parameters

You can modify the Setup parameters to configure the card-edge
Note
Setup parameters on a local or remote control panel may be different from the card-edge parameters described here.
controls for your personal needs. The Setup section appears at the end of all three navigation lists and consists of these items:
•Alarms
• Navigation modes
• Adjustment modes
•Browse modes
• Scroll modes
• Display intensity
• Parameter descriptions
•Name
• FrameIP
•Sync full
• About mode
The structure of the Setup menu is located at the end of Appendix A: “Tree View Navigation.” See your NEO FR-3901, FR-3903, and FR-3923 Mounting Frames Installation and Operation Manual for more information on Setup items, including descriptions and operation notes.
26 AS-3901-B and -C Installation and Operation Manual

Alarms

AS-3901-B and -C modules provide a default list of one alarm. You can disable any alarm by modifying the Alarms parameter in the Setup section.
When you select Alarms, all of the active alarms are visible in the display, below Config (Configurations). If no alarms are active, only Config appears.

Alarm Synchronization

Alarm synchronization is available for this module if your NEO frame contains a 3901RES-E resource module that supports the feature. When active, alarm synchronization ensures that the alarm configuration settings of card-edge controls and the CCS control software and control panels are consistent.
If the AS-3901-B and -C modules are set for local control, the alarm settings will appear the same at both the card edge and via CCS, but the settings can only be changed using the card-edge controls. If the module is set for remote control, the alarm settings can be changed via both the card edge and CCS control software and control panels.
Alarm configuration settings undergo DejaView (state recovery) automatically. This means that when a module is hot-swapped, the alarm configuration for the new module is updated to the settings of the module that was previously in that slot. See “State Recovery Parameter Availability” in this chapter for more information.
Chapter 3: Operation

Identifying the Cause of an Alarm

To identify the reason for an alarm, select the active alarm, and then press Enter. A scrolling message appears on the VFD describing the cause of the fault.
AS-3901-B and -C Installation and Operation Manual 27
Chapter 3: Operation

Enabling or Disabling an Alarm Parameter

To enable or disable an alarm parameter, follow these steps:
1. Select Alarms, then select Config, and then press Enter.
2. Select one of the alarm parameters, and then press Enter.
3. Press Enabled or Disabled.
4. Press Enter to activate the selection.

Restoring Default Settings

To restore the alarms to their default settings, follow these steps:
1. Select Alarms, select Config, and then press Enter.
2. Scroll down the list of alarms, and then select Reset.
3. Press Enter to activate the selection.
The following table lists the default alarms for the AS-3901-B and -C modules. You can enable or disable these settings, but you cannot change the level of the alarm.
.
Table 3-3. AS-3901-B and C Default Alarms
Card-Edge Alarm
DARSLock DARS Lock Minor Loss of DARS lock
Name of Alarm
Alarm Level
Meaning (When Lit)

State Recovery Parameter Availability

The parameter settings for this module are automatically saved onto the 3901RES-E resource module installed in your NEO frame every five minutes. If a module should fail and be replaced with a cold spare, the state parameters can be automatically recovered. For more information on this feature, see the NEO FR-3901, FR-3903, and FR-3923 Mounting Frames Installation and Operation Manual (Edition E and above).
28 AS-3901-B and -C Installation and Operation Manual

LEDs and Indicators

General Information

The AS-3901-B or AS-3901-C Audio Synchronizers have twelve card-edge LEDs and four standard module indicators.
The modules generate visible alarm signals to alert users of failures or impending failures. These alarm signals can be found in the following locations:
• As red or yellow LEDs on the front module card-edge
• As red or yellow LEDs on the 3901AIC Alarm Interconnect module
or the 3901RES-E Resource module (visible via light pipes through the frame’s front panel)
• As part of a list of activated alarms found in the Setup menu
• In external systems connected to the alarm contact closures at the
back of the NEO™ FR-3901 and FR-3903 frames
• On a PC screen where Pilot™ or another GUI-based control
application is used
Chapter 3: Operation
AS-3901-B and -C Installation and Operation Manual 29
Chapter 3: Operation

Card-Edge LED Locations

Alarm signals are generated both by the AS-3901-B or AS-3901-C modules and by other modules and components in the NEO frame. For details on these alarms, refer to the relevant frame or module manuals.
Figure 3-3 illustrates the locations of the LEDs and standard module
indicators of the AS-3901-B or AS-3901-C.
Figure 3-3. Card-edge LEDs and Module Indicators, Top View
30 AS-3901-B and -C Installation and Operation Manual

LED Descriptions

Chapter 3: Operation
See Figure 3-3 on page 30 for the location of the card-edge LEDs described in Table 3-4
Table 3-4. Card-Edge LED Color and Meaning
LED Indicator Color Meaning
SDI Present None (Not available in the AS-3901-B or
AS-3901-C)
Error None (Not available in the AS-3901-B or
AS-3901-C)
525 None (Not available in the AS-3901-B or
AS-3901-C)
625 None (Not available in the AS-3901-B or
AS-3901-C)
Freeze None (Not available in the AS-3901-B or
AS-3901-C)
Reference Present None (Not available in the AS-3901-B or
AS-3901-C)
Reference Locked None (Not available in the AS-3901-B or
AS-3901-C)
(blank) None (Blank)
Embed Error None (Not available in the AS-3901-B or
AS-3901-C)
De-embed Error None (Not available in the AS-3901-B or
AS-3901-C)
Audio Sync Error None (Not available in the AS-3901-B or
AS-3901-C)
DARS Present Green DARS reference is present at input
AS-3901-B and -C Installation and Operation Manual 31
Chapter 3: Operation

Module Indicator Descriptions

See Figure 3-3 on page 30 for the location of the module indicators described in Table 3-5
Table 3-5. Module Indicators Color and Meaning
Indicator Color Meaning (When Lit)
Major Alarm Red No major alarms in the AS-3901-B and -C
Minor Alarm Yellow Loss of DARS lock
Power Green Power is provided to the module
Module Status! Green Module is configured, loaded, and
modules
operational
32 AS-3901-B and -C Installation and Operation Manual

Overview

Chapter 4

Specifications

The tables in this chapter list the following specifications for the AS-3901-B and -C modules:
• “Input” on page 34
• “Output” on page 36
• “Miscellaneous” on page 37
Specifications and designs are subject to change without notice.
AS-3901-B and -C Installation and Operation Manual 33
Chapter 4: Specifications

Input

Balanced AES Input (-B Version Only)

Table 4-1. Balanced AES Input Specifications
Item Specification
Connector DB-25 female
Sensitivity <200 mV
Impedance 110Ω ± 20% (0.1 to 6 MHz)
Maximum input signal 10 V pk-to-pk
Common mode rejection 0 to 7 V (0 to 20 kHz)
Input audio rate 32 kHz to 108 kHz

Unbalanced AES Input (-C Version Only)

Table 4-2. Unbalanced AES Input Specifications
Item Specification
Connector BNC (IEC169-8)
Sensitivity <100 mV
Impedance 75Ω
Return loss >25 dB (0.1 to 6.0 MHz)
Input audio rate 32 kHz to 108 kHz
34 AS-3901-B and -C Installation and Operation Manual

Balanced DARS Input (-B Version Only)

Table 4-3. Balanced DARS Input Specifications
Item Specification
Connector DB-25 female
Sensitivity <200 mV
Impedance 110Ω ± 20% (0.1 to 6 MHz)
Maximum input signal 10 V pk-to-pk
Common mode rejection 0 to 7 V (0 to 20 kHz)

Unbalanced DARS Input (-C Version Only)

Table 4-4. Unbalanced DARS Input Specifications
Item Specification
Chapter 4: Specifications
Connector BNC (IEC169-8)
Sensitivity <100 mV
Impedance 75Ω
Return loss >25 dB (0.1 to 6.0 MHz)
AS-3901-B and -C Installation and Operation Manual 35
Chapter 4: Specifications

Output

Balanced AES Output (-B Version Only)

Table 4-5. Balanced AES Audio Output Specifications
Item Specification
Connector DB-25 female
Output level 4.0 V pk-to-pk
Jitter
Rise and fall time 30 to 44 ns (10% to 90%)
Impedance 110Ω ± 20% (0.1 to 6 MHz)
Common mode component >30 dB below output signal (0 to 6 MHz)
DC offset 0 ± 50 mV
<40 ns pk-to-pk

Unbalanced AES Output (-C Version Only)

Table 4-6. Unbalanced AES Audio Output Specifications
Item Specification
Connector BNC (IEC 169-8)
Output level 1.0 V ± 10% pk-to-pk
DC offset 0.0 V ± 50 mV
Rise and fall time 30 to 44 ns (10% to 90%)
Impedance 75Ω
Return loss >25 dB (0.1 to 6.0 MHz)
36 AS-3901-B and -C Installation and Operation Manual

Miscellaneous

Propagation Delays

Table 4-7. Propagation Delay Specifications
Item Specification
Audio (minimum delay setting) 2.1 msec

Power Consumption

Table 4-8. Power Consumption Specifications
Item Specification
Power consumption +24 V: <13 W
Chapter 4: Specifications

Start-Up Time

Table 4-9. Start-Up Time Specifications
Item Specification
Start-up time 8 sec
AS-3901-B and -C Installation and Operation Manual 37
Chapter 4: Specifications
38 AS-3901-B and -C Installation and Operation Manual

Overview

Appendix A

Tree View Navigation

The Tree View is one of the three navigation modes available on the AS-3901-B and -C modules. Unlike the other navigation modes, the Tree View is a multi-level list of parameters, arranged in the following main groups:
• “Input” on page 41
• “Other” on page 41
• “Output” on page 41
• “Processing” on page 42
• “Setup” on page 42
(See page 26 for more information on the Setup parameters which govern the operation of the card-edge controls.)
This appendix consists of instructions for navigating the lists (see
page 40) and the Tree View Parameter list.
AS-3901-B and -C Installation and Operation Manual 39
Appendix A: Tree View Navigation

Navigating the Tree View

To navigate and then view or change a parameter from the Tree View, follow these steps:
1. Open the front panel of the NEO frame.
2. Press any card-edge control to turn on the VFD display.
Note
If you do not wish to make changes to your settings, return to the previously selected item in the list, and then press
Escape to move up a level. See SelPar Adj Mode in the Setup
section at the end of the Tree View to enable or disable this delayed adjust mode feature.
The message AS-3901-B or AS-3901-C will appear as the banner on the card-edge display.
3. Press the Enter button.
The first two items in the Level One list will appear.
4. Click Nav- (down) on the Nav-/Nav+ switch to view more items in the Level One list.
5. Select the desired item in the Level One list, and then press Enter.
This leads you to the Level Two list.
6. Repeat steps 3 and 4 to view more items in Levels Two, Three, and Four.
Note
After several seconds of inactivity, a scrolling message will appear, describing the purpose of the currently selected parameter.
7. If the parameter is selectable, slide the bar to the desired parameter using the Nav+/Nav-switch.
OR
Select the desired item in the Level Four list, and then press Enter.
Once the Level Four parameter is set or viewed, you can leave the parameter in its current state, or return to the banner. To return to the AS-3901-B and -C banner, repeatedly press the Escape button.
Close the front panel again after you have completed the procedure to prevent the frame from overheating.
40 AS-3901-B and -C Installation and Operation Manual

Tree View Parameters

Unlike the Operator and All List navigation modes, the Tree View is a multi-level structure that includes all of the available card-edge parameters. Parameters with the designation [RO] are “read-only.” An asterisk (*) indicates the default user range or value.
See page 40 for instructions on navigating the Tree View.
Input
AudioProc
Genlock
Other
Other
Output
Other
Appendix A: Tree View Navigation
Gain_1A, Gain_1B, Gain_2A, and Gain_2B
(Range: -18.0 to 18.0 dB; 0 dB*)
Invert1A, Invert1B, Invert2A, and Invert2B
(Options: No*, Yes)
DARSPrsnt [RO]
(Options: No, Yes)
DARSLock [RO]
(Options: No Lock, Locked)
AES_Prsnt [RO]
(Options: ==, 1=, =2, 12)
AES1Format and AES2Format
(Options: PCM*, Non-PCM)
FctryRcl
(Options: No*, Yes)
Out01Src
(Options: AES1a*, AES1b, AES2a, AES2b, Mute, AES1
Sum, AES2 Sum)
Out02Src
(Options: AES1a, AES1b*, AES2a, AES2b, Mute, AES1
Sum, AES2 Sum)
Out03Src
(Options: AES1a, AES1b, AES2a*, AES2b, Mute, AES1
Sum, AES2 Sum)
Out04Src
(Options: AES1a, AES1b, AES2a, AES2b*, Mute, AES1
Sum, AES2 Sum)
DnBusEn
(Options: No*, Yes)
AS-3901-B and -C Installation and Operation Manual 41
Appendix A: Tree View Navigation
Note
*Default settings for Frame IP options are as follows: IP Address (192.168.100.250), Subnet (255.255.255.0), and Gateway (192.168.100.250).
Processing
AudioProc
DitherMode
(Options: None*, On)
Out01_DR to Out04_DR
(Options: 24 bits, 20 bits*, 16 bits)
Other
FadeRate
(Range: 0.000 to 10.000 s; 0.010 s*)
Synchronization Delay
Delay_1A, Delay_1B, Delay_2A, and Delay_2B
(Range: 0.00* to 1320.00 msec)
Setup
Alarms
Config
DARSLock (Options: Disable, Enable*) Reset
Active Alarms
DARSLock (if alarm is activated)
Nav Mode (Navigation Mode)
(Options: Oper List*, All List, Tree View)
SelPar Adj Mode (Selectable Parameter Adjust Mode)
(Options: Immediate, Delayed*)
Brws Mode (Browse Mode)
(Options: Param List, Param+Val*)
Scrl Mode (Scroll Mode)
(Options: Wrap*, Don’t Wrap)
Disp Inten (Display Intensity)
(Options: 100%, 50%*, 25%, 12%)
Param Desc (Parameter Description)
(Options: Enabled*, Disabled)
Name
AS-3901-B and -C*
Frame IP (*see note for default settings)
(Options: IP Address, Subnet, Gateway)
Sync Full
(Options: No*, Yes)
About [RO]
(Options: AS_HwId, Sw_Ver)
42 AS-3901-B and -C Installation and Operation Manual

Overview

Appendix B

Audio Bit Manipulation

The following tables contains information on manipulating audio bits. The receiver is a B3 implementation; the transmitter is a standard implementation.
RX Key: N = not recognized, Y = recognized, S = recognized and stored or passed through or both
TX Key: N = not transmitted, Y = transmitted
AS-3901-B and -C Installation and Operation Manual 43
Appendix B: Audio Bit Manipulation

Channel Status Bits

Table B-1. C-Bit Manipulation
Byte Bit Function RX TX Remarks
0 0 [0] Consumer Use
[1] Professional Use
01[0] Audio
[1] Non-Audio
0 2 to 4 [000] Not Indicated
[100] No Emphasis [110] 50/15 us [111] CCITT J.17
0 5 [0] Locked
[1] Unlocked
0 6 to 7 [00] Not Indicated
[01] 48 khz [10] 44.1 khz [11] 32 khz
1 0 to 3 [0000] Not Indicated
[0001] Two Channel [0010] Mono [0011] Prim/sec [0100] Stereo [0101] To [1111] Undefined
N
N
Y
Y
S
Y
S
Y
Y
S
Y
S
Y
S
Y
S
N
Y
N
N
N
Y
Y
Y
N
Y
N
Y
Y
N
N
N
N
N
N
N
N
N
N
N
Set to 1
Passed unmodified
Passed unmodified
• Set to 0 if DARS locked
•Set to 1 if DARS unlocked
Set to [01]
Set to 0
Y
1 4 to 7 [0000] Not Indicated
[0001] 192 Bit Block [0010] AES18 (Hdlc) [0011] User Defined [0100] To [1111] Undefined
2 0 to 2 [000] Not Indicated
[001] Audio Data [010] Co-ordination Signal [011] To [111] Undefined
44 AS-3901-B and -C Installation and Operation Manual
S
Y
S
Y
S
Y
S
Y
S
Y
N
Y
N
N
N
N
N
Passed unmodified
Set to [001] if 24 bits; otherwise set to [000]
Table B-1. C-Bit Manipulation(Continued)
Appendix B: Audio Bit Manipulation
2 3 to 5 [000] Not Indicated
[001] Max Length - 1 [010] Max Length - 2 [011] Max Length - 3 [100] Max Length - 4 [101] Max Length [110] To [111] Undefined
N
N
N
N
N
N
N
N
Y
N
Y
N
N
N
Set to [100] if 16 bits otherwise set to [101]
2 6 to 7 Reserved N Y Set to 0
3 0 to 7 Reserved N Y Set to 0
4 0 to 1 [00] Not A Reference
[01] Grade 1 Reference [10] Grade 2 Reference [11] Undefined
Y
N
N
N
N
N
N
N
Set to 0
4 2 to 7 Reserved N Y Set to 0
5 0 to 7 Reserved N Y Set to 0
6 to 9 0 to 7 Alphanumeric Channel Origin Data S Y Passed unmodified
10 to 13 0 to 7 Alphanumeric Channel Destination Data S Y Passed unmodified
14 to 17 0 to 7 Local Sample Address Code S Y Passed unmodified
18 to 21 0 to 7 Time-of-day Sample Address Code S Y Passed unmodified
22 0 to 3 Reserved N Y Set to 0
22 4 Bytes 0 To 5 Reliability Flag S Y Passed unmodified
22 5 Bytes 6 To 13 Reliability Flag S Y Passed unmodified
22 6 Bytes 14 To 17 Reliability Flag S Y Passed unmodified
22 7 Bytes 18 To 21 Reliability Flag S Y Passed unmodified
23 0 to 7 CRC Y Y Calculated on output
AS-3901-B and -C Installation and Operation Manual 45
Appendix B: Audio Bit Manipulation

Validity and User Bits

Table B-2. V- and U-Bit Manipulation
Bit Manipulation RX TX Remarks
Validity (V) Bit S Y No automatic
User (U) Bit S Y Passed unmodified

Miscellaneous Data

Table B-3. Miscellaneous Data
Item RX Specification TX Specification
adjustment
Audio Sampling Frequency (kHz)
Audio Sampling Word Length (bits)
32 to 108 48
16 to 24 16 to 24
46 AS-3901-B and -C Installation and Operation Manual

Overview

Appendix C

Audio Embedding

The audio embedder component in the AS-3901-B and -C modules are composed of several smaller subcomponent blocks:
• One ancillary data stripper (ADS)
• Four audio embedding subcomponents
The first subcomponent is an ancillary data stripper (ADS). This block allows the user to remove all audio groups presently in the input SDI stream, prior to embedding.
Following the ADS block are four separate audio-embedding subcomponents. Each subcomponent has the ability to operate on only one audio group, either appending or overwriting a predetermined group onto the SDI stream.
AS-3901-B and -C Installation and Operation Manual 47
Appendix C: Audio Embedding

Embedding Errors

During the embedding operation, errors may arise for the following reasons:
• An attempt is made to append a group when it is already present.
• An attempt is made to overwrite a group when it is not present.
• An attempt is made to overwrite a group composed of 20-bit audio samples with a group composed of 24-bit audio samples.
• There is an overflow condition in the ancillary data space.
• There is an overflow or underflow of the internal buffer.

Preventing Embedding Errors

To avoid embedding errors, follow these guidelines:
• Set the embedding mode to Auto. If the group is present, it will be overwritten; if it is not present, it will be appended. The overwrite and append errors are actually warnings that the desired operation is not being performed.
• Don’t overwrite embedded groups of 20-bit audio samples with groups of 24-bit audio samples. The required extended data packet information appended to that group may overwrite a pre-existing audio group. For 24-bit audio embedding, use the ADS cleaning feature provided.
• Use the ADS Clean feature to avoid ADS overflow situations.
48 AS-3901-B and -C Installation and Operation Manual

Keywords

Index

A
Add Upgrade Files box 10–15 AES specifications
balanced input (B version) 34 balanced output (B version) 36 unbalanced input (C version) 34
unbalanced output (C version) 36 alarms 27 All List and Operator List 24
–28
–25
B
back modules 4 balanced pinouts 4 boot file 10 buying manuals ix
, 12–14
C
card-edge LED locations 30 causes of alarms 27 compliance and certification information xi Configuration... window 10 configuring the module 17 correcting a failed upgrade 14
–16
D
DARS specifications
balanced input (B version) 35
unbalanced input (C version) 35 default settings for alarms 28 DejaView 27 disabling or enabling alarms 28 Discovery method of upgrading 10 drag-and-drop method of upgrading 12
–11
E
enabling or disabling alarms 28
F
fail-safe procedure 14 FctryRcl parameter 18 FctryRcl parameters 24 firmware upgrading 10 fl0 folder 11 front module 3 functional block diagram 6
, 13, 16
–16
I
–13
identifying causes of alarm 27 input specifications 34 installing and removing modules 8
AS-3901-B and -C Installation and Operation Manual 49
Index
L
LED descriptions 31 LEDs and indicators 29
–31
M
main features 2 manuals, purchasing ix module indicator descriptions 31 module installation 8
N
navigating parameter lists 23, 40 Navigation Properties box 12
, 15
O
operating the decoder 17 operating the module 17 Operator and All List 24 output specifications 36
–25
P
packing equipment for shipping x packing list 8 parameter lists
Operator and All 24 Tree View 41
parameters
FctryRcl 18
Setup 26 plug-in adapter 5 processing
Non-PCM 21
PCM 20
, 24
returning equipment x revision history vii
S
safety standards and compliances xi setting up the module 17 Setup parameters 26 shipping equipment x signal flow 6 Software Upgrade tab 11 software upgrading 10 state recovery of alarms 27 synchronizing alarms 27
–12
–16
, 28
T
Tree View parameter list 41–42
U
unpacking x upgrading firmware 10 using card-edge controls on the module 17
–16
V
vxWorks.lzs file 11, 13–14, 16
W
Web site, location of manuals ix
R
rebooting the module 11, 16 removing and installing modules 8 restoring default settings for alarms 28
50 AS-3901-B and -C Installation and Operation Manual
Trademarks and Copyright
AgileVision, BO/S, Broadcast Operating System, CCS, Command Control System, CCS CoPilot, CCS Navigator, CCS Pilot, DigiBus, DigiPeek, Digital Glue, DigiWorks, DPS, DTV Glue, EventWORKS, EZ HD, Genesis, HDTV Glue, Innovision, ISIS, JUNO, LeFont, Leitch, LogoMotion, MediaFile, MediaPort, MIX BOX, Monarch, NEO, the NEO design, OPUS, PanelMAPPER, Portal, PROM-Slide, RouterMAPPER, RouterWORKS, StillFile, Still Net, SuiteView, Tekniche, Unilock, VIA, ViewGuard, Whiplash2, Xplus, and Leitch XPRESS are trademarks of Leitch Technology International Inc. which may be registered in the United States, Canada, and/or other countries.
All other trademarks are the property of their respective owners.
Copyright 2005 Leitch Technology International Inc. All rights reserved. This publication supersedes all previous releases. Printed in Canada.
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• Ninety days for parts, assemblies and supplies to support hardware Products previously sold to Customers;
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• The same period as the hardware Product warranty for media of software licensed as an integral part of any Leitch hardware Product, and encoding created by Leitch as physically affixed on or embedded in such media
• Ninety days for Services.
Please refer to the current "Leitch Limited Warranty Policy" for a complete description of the warranty provided, including important exclusions and limitations as well as procedures for obtaining warranty service.
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