Grass Valley 8916 User Manual

8916

AES/EBU AUTO-TRACKING DELAY DA

Instruction Manual

071-0585-01

FIRST PRINTING: JULY 1999

REVISED PRINTING: JUNE 2000

Contacting Grass Valley Group

Region Voice Fax Address Web Site

North America [phone]

530-478-4148

Pacific Operations [phone]

Support: 852-2585-6579
U.K., Europe, Asia, Middle East [phone] [phone]
France [phone]
Germany [phone] [phone]

Copyright © Grass Valley Group. All rights reserved.

This document may not be copied, in whole or in part, or otherwise reproduced, except as specifically
permitted under U.S. copyright law, without the prior written consent of Grass Valley Group, P.O. Box
599000, Nevada City, CA 95959-7900 USA. GRASS VALLEY GROUP is a registered trademark and
Grass Valley is a trademark of Grass Valley Group. All registered trademarks and trademarks are prop­erty of their respective holders. Grass Valley Group products are covered by U.S. and foreign patents,
issued and pending. Product options and specifications subject to change without notice. The informa­tion in this manual is furnished for informational use only, is subject to change without notice, and
should not be construed as a commitment by Grass Valley Group. Grass Valley Group assumes no re­sponsibility or liability for any errors or inaccuracies that may appear in this publication.

[phone] Grass Valley Group

[phone]

P.O. Box 599000
Nevada City, CA 95959-7900
USA

www.grassvalleygroup.com

Contents

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Frame Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Module Placement in the 8900 Frame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Loop-through Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Delay Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Operation Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Onboard Module Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Delay Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Remote Control Lockout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Remote Configuration and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Module Configuration Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Signal Configuration Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Input Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

FPGA Delay Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Delay FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Transmitter/Multiplexer Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Line Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Delay Adjustment Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Audio Delay Control Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

8916 Instruction Manual iii

Contents

iv 8916 Instruction Manual

Preface

About This Manual

This manual describes the features of a specific module of the 8900 Series
Modular Products family. As part of this module family, it is subject to
Safety and Regulatory Compliance described in the 8900 Series frame and
power supply documentation (see the 8900TX/8900TF/8900TFN Frames

Instruction Manual ).

8916 Instruction Manual v

Preface

vi 8916 Instruction Manual

8916 AES/EBU Auto-Tracking Delay DA

Introduction

The 8916 Auto-Tracking DA is a 1 x 7 distribution amplifier for AES/EBU
serial digital audio. It delays digital audio to correct lip-sync errors. The
8916 offers two forms of delay, which are summed:

■

A fixed delay up to 0.5 seconds
A variable delay based on the signal input from a Grass Valley video

■

frame synchronizer

The 8916 can correct a large, fixed lip-sync error while continuously
adjusting audio delay to match video delay created by a frame sync’s asyn­chronous video input.

The 8916 offers the following features:

Up to 0.5 second delay in 2 ms increments

■

■

Auto-tracks Grass Valley video frame sync delays (models 8900FSS,
SMS 8121-FS, 8981FS, VFS211, and 8960DEC)

Note

■

■

■

■

Early versions of the 8960DEC did not support the export of the auto-track
signal. Contact Grass Valley customer service for more information regarding
8960DEC frame sync.

Seven 75
Module is part of the 8900 family of audio and video modules
Supports remote control in 8900 networking frames
Offers remote control lockout using an on-board jumper

Ω

outputs

8916 Instruction Manual 1

8916 AES/EBU Auto-Tracking Delay DA

Installation

Installation of the 8916 module is a process of:

Placing the module in the proper frame slot, and

■

■

Cabling and terminating signal ports.

The 8916 module can be plugged in and removed from an 8900 Series frame

with power on. When power is applied to the module, LED indicators

reflect the initialization process (see Power Up on page 5 ).

Frame Capacity

The maximum number of 8900 modules allowed in a frame is determined

by frame cooling capacity. Table 1 provides the power capacity, cooling

capacity, and maximum module count for the 8916 in each frame type.

Table 1. Power, Cooling, and Module Capacity of 8900 Frames

Capacity Calculated

Power (W) 60 60 100 100 100
Recommended Module Cooling (W) 30 60 30 90 90
8916 Modules 8 10 8 10 10

Note

Module capacity figures assume no other modules are in the frame.
If the maximum number of modules a frame can handle is less than ten,
provide as much space between the modules as possible.

8900T2

Frame

8900T2-F

Frame

8900TX

Frame

8900TF

Frame

8900TFN

Frame

2 8916 Instruction Manual