Grass Valley 8912RDA User Manual

8912RDA/RDA-D

AES/EBU RECLOCKING DISTRIBUTION AMPLIFIER

Instruction Manual

071815700

1.0software release

FIRST PRINTING: FEBRUARY 2002

Contacting Grass Valley Group

Region Voice Fax Address Web Site

North America [phone]

Support: 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.

Sales: [phone]
Support: [phone]

[phone]

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

www.grassvalleygroup.com

Grass Valley Group Web Site

The www

Online User Documentation

data sheets, ordering guides, planning guides, manuals, and release notes
in .pdf format can be downloaded.

FAQ Database

found by searching our Frequently Asked Questions (FAQ) database.

Software Downloads

loaded.

.grassvalleygroup.com web site offers the following:

— Current versions of product catalogs, brochures,

— Solutions to problems and troubleshooting efforts can be

— Software updates, drivers, and patches can be down-

2 8912RDA/RDA-D Instruction Manual

Contents

Preface

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

8912RDA/RDA-D AES/EBU Reclocking Distribution Amplifier

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Frame Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Module Placement in the 8900 Frame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Operation Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Onboard Module Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Remote Configuration and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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

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

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

AES Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Lock LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Linear Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Index

8912RDA/RDA-D Instruction Manual 3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Contents

4 8912RDA/RDA-D 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 8900 Series Frames Instruction

Manual ).

8912RDA/RDA-D Instruction Manual 5

6 8912RDA/RDA-D Instruction Manual

8912RDA/RDA-D AES/EBU
Reclocking Distribution
Amplifier

Introduction

The 8912RDA module is a low cost, high density analog audio distribution
amplifier (DA) available in single- and dual-channel versions. It is
designed for use in the 8900 Audio Frame. The single-channel module has
one balanced and one unbalanced (BNC) input and produces eight 110
balanced outputs. The dual-channel version has two balanced inputs and
two unbalanced inputs and produces four 110
channel. Balanced or unbalanced inputs are selectable by channel and can
also be jumpered to have 75
data is reclocked by means of a phase-locked-loop (PLL).

The 8912RDA features:

• AES3 or AES3id inputs with selectable 110

• Eight single (RDA) or four dual (RDA-D) AES3 110

• Outputs re-clocked at any data rate from 32 kHz to 96 kHz, and

• Remote and local reporting of input lock and input error.

Ω

, 110

Ω

, or high input impedance. The AES

Ω

balanced outputs per

Ω

, 75

Ω

, or Hi impedance,

Ω

balanced outputs,

Ω

8912RDA/RDA-D Instruction Manual 7

Installation

Frame Capacity

1.

2.

Installation of the 8912RDA module is a process of:

Placing the module in the proper frame slot, and

Cabling signal ports.

The 8912RDA 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 11).

The 8912RDA module can be installed in all 8900 Series frames but with
varying maximum quantities determined by frame cooling capacity.

Table 1 provides the power capacity, cooling capacity, and maximum

module count for each frame type.

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

Capacity Calculated

Power (W) 100 100 100
Recommended Module Cooling (W) 30 90 90
8912RDA Modules 10 10 10
8912RDA-D Modules 9 10 10

Note

Module capacity figures assume no other modules are in the frame.
X = Not recommended without forced air cooling.

8900TX-A

Frame

Module Placement in the 8900 Frame

There are ten slot locations in the frame to accommodate either analog or
digital modules. These are the left ten locations. Refer to Figure 1 on page 9.

The two slots on the right are allocated for the power supplies. For addi­tional information concerning the Power Supply module, refer to the 8900
Power Supply manual.

The third slot from the right is allocated for the Frame Monitor or Network
Interface Controller module. These modules provide health monitoring
and control options.

8900TF-A

Frame

8900TFN-A

Frame

8 8912RDA/RDA-D Instruction Manual

1.

2.

3.

Figure 1. 8900 Series Frame

Installation

0642-04

8900 Audio Media Module

Power

Supplies

(only)

Frame Monitor

or Network Interface

Module (only)

8900 module slots are interchangeable within the frame. There are 10 three­terminal connectors and 4 BNC connectors in each slot’s I/O group. The
functional assignment of each connector in a group is determined by the
module that is placed in that slot. The maximum number of media modules
an 8900 frame can accept is ten. Figure 2 illustrates the rear connector plate
for an 8900 Series frame.

Figure 2. 8900 Series Frame Rear Connector

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

J14

IN
10

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

J14

IN

9

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

J14

IN

8

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

J14

IN
7

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

J14

IN

6

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

J14

IN

5

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

J14

IN

4

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

J14

IN

3

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

J14

IN

2

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

0636 -17

J14

IN

1

To install a module in the frame:

Insert the module, connector end first, with the component side of the
module facing to the right and the ejector tab to the top.

Verify that the module connector seats properly against the backplane.

Press in the ejector tab to seat the module.

8912RDA/RDA-D Instruction Manual 9

Cabling

Inputs

Connect an input source to one of the three-terminal input connectors (see

Figure 3), J11 or J12 (J11 only for single channel modules). The 8912 input

will accept AES3id -1992 digital audio signals.

Figure 3. 8912RDA Single and Dual Channel Input/Output Connectors

+ -

G

Single

J1

J2

J3

Ch 1 Outputs

(J1 - J8)

Ch 1 Input

Ch 1 Input Not Used

J5

J7

J9

J10

J11

J4

J6

J8

J12

J2

Not Used

Ch 1 Outputs

(J1 - J4)

Ch 2 Outputs

(J5 - J8)

Ch 1 Input

Ch 1 Input

J11

Dual

J1

J3

J5

J7

J9

J10

J2

J4

J6

J8

J12

J2

Ch 2 Input

Ch 2 Input

Not Used

Outputs

J13

IN

J14

8157_03

1

J13

IN

J14

1

Not Used

The 8912 has eight three-terminal outputs (J1 through J8). The 8912 dual
channel module uses the first four outputs (J1 through J4) for Channel 1
and the next four (J5 through J8) for Channel 2. The output signal conforms
to AES3id - 1992 (AC coupled) digital audio signal standard.

10 8912RDA/RDA-D Instruction Manual

Power Up

Operation Indicator LEDs

Power Up

The front LED indicators and configuration switches are illustrated in

Figure 4. Upon power-up, the green PWR LED should light and the yellow

CONF LED should illuminate for the duration of module initialization.

With factory default configuration and a valid input signal connected, the
green PWR LED, and one or both of the green signal Channel Lock LEDs
should illuminate when phase lock is achieved for valid AES/EBU input
signals (refer to Table 1 on page 12 to see the possible operating indicator
combinations).

The yellow COMM LED, when flashing, indicates communication is active
on the frame bus. The LED also goes into a steady long interval flash when
the module receives a Location command from the remote control system,
providing easy visual identification of the module in a rack with multiple
8900 frames.

Figure 4. LEDs and Testpoints

FAULT (red)
COMM (yellow)

PWR (green)

1/2 amp

+5 V testpoint

Channel 1 lock (green)
Channel 2 lock (green)

125 V fuse

F2

A red FAULT LED indicates an error situation and, with the previously
described LEDs, can indicate the operational conditions presented in

Table 1 on page 12. The table describes LED indications and the signal

input/output conditions that are indicated.

8157_05

8912RDA/RDA-D Instruction Manual 11

Table 1. LED Indications for Input Conditions and Resulting Output Signals

Fault

(red)

OFF ON Valid AES/EBU inputs present. AES/EBU serial digital output re-clocked at input sample rate
Flashing OFF Invalid AES/EBU inputs present. The received bi-phase data
Flashing OFF No AES/EBU input signal present No output signal

Flashing ON

Flashing OFF

OFF ON AES/EBU input at other than standard data rates AES/EBU output reclocked at input sample rate

Lock

LED

Configuration

Input Condition Output Signal

AES/EBU input with parity errors or bi-phase encoding
errors, or channel status CRC errors, validity bit set

AES/EBU input with confidence error, means eye pattern
too small to reliably extract data

AES/EBU output will not have the error but the data may be
corrupted producing audio pops and clicks

AES/EBU output with intermittent audio

The 8912RDA can be configured locally using onboard jumpers.

Configuration establishes:

• Input impedance,

• Balanced or unbalanced inputs, and

• Single- or dual-channel operation (8912RDA-D modules only).

Onboard Module Configuration

The 8912RDA module is configured by setting jumpers shown in Figure 5.

These jumpers shown perform the following:

• JP5 and JP6 select 75

• JP7 through JP10 select balanced or unbalanced inputs, and

• JP4 allows the dual-channel module to be set for either single-or dual­channel operation.

Ω

, 110

Ω

, or high impedance inputs,

12 8912RDA/RDA-D Instruction Manual

Figure 5. Module Configuration Jumpers

JP4

JP5

JP6

JP7

JP8

JP9

JP10

8156_06

Ch. 1 = JP7 & JP8
Ch. 2 = JP9 & JP10

Balanced/Unbalanced

Input Selection

Unbalanced

Balanced

JP4

Single Channel/

Dual Channel Select

Dual channel

Single channel

Input Impedance
Channel 1 (JP 5)

and Channel 2 (JP 6)

75 Ω

100 Ω

Hi Z

Configuration

Remote Configuration and Monitoring

8912RDA and RDA-D have limited reporting ability and no remote config­uration functionality. They will report:

• Module presence,

• Model number,

• Slot ID,

• Revision and serial numbers,

• Channel lock, and

• Channel errors.

8912RDA/RDA-D Instruction Manual 13

Specifications

Table 1. 8912RDA Specifications

Parameter Value

AES/EBU Input

Differential voltage range Balanced AES3: 200 mV p-p to 12 V p-p

Sample rate 32 kHz to 96 kHz
Common mode range +10/-10 V, 50 Hz to 20 kHz
Input return loss Balanced: >15 dB, 100 kHz to 10 MHz

Outputs

Number of outputs RDA (single channel): 8 balanced

Signal type AES3 – 1992
Signal level 3 V p-p ±0.2 V terminated into 110 Ω
Output impedance < 110 Ω balanced
Rise/fall time Minimum 5 ns to maximum 30 ns across 110 Ω
Sample rate 32 kHz to 96 kHz
Output return loss >15 dB, 100 kHz to 10 MHz

Performance

Module insertion to operation <1.5 sec.
Electrical length (delay) 203 µs @ 32 kHz

Jitter tolerance AES3-1992 Amendment 1-1997

Maximum intrinsic jitter <25 mUI peak
Ability to lock with jitter 0.200 UI peak wideband random jitter

Environmental

Frame temperature range 0 to 45 degrees C
Operating humidity range 10 to 90% non-condensing
Non-operating temperature -10 to 70 degrees C

Mechanical

Frame type 8900 Audio Frame

Power Requirements

Supply voltage +12 V
Power consumption <4 Watts

Unbalanced AES3id: 200 mV p-p to 2 V p-p

Unbalanced: >25 dB, 100 kHz to 10 MHz

RDA-D (dual channel): 4 balanced per channel

147.6 µs @ 44.1 kHz

135.5 µs @ 48 kHz

67.7 µs @ 96 kHz

Jitter EQ = 10 UI p-p, 10 Hz - 200 Hz;
Linear decrease from 10 UI p-p to 0.25 UI p-p from 200 Hz to 8 kHz;

0.25 UI p-p above 8 kHz

at any sample rate from 32 kHz - 96 kHz

14 8912RDA/RDA-D Instruction Manual

Service

Service

The 8912RDA modules make extensive use of surface-mount technology
and programmed parts to achieve compact size and adherence to
demanding technical specifications. Circuit modules should not be ser­viced in the field unless directed otherwise by Customer Service.

If your module is not operating correctly, proceed as follows:

• Check frame and module power and Channel Lock LEDs.

• Verify power at the voltage testpoint (see Figure 6) and the check fuse

if no voltage is detected.

• Check for presence and quality of input signals.

• Verify that source equipment is operating correctly.

• Check cable connections.

• Check output connections for correct I/O mapping (correct input con-

nector is used for the corresponding channel output).

Refer to Table 1 on page 12 for proper LED indications.

If the module is still not operating correctly, replace it with a known good
spare and return the faulty module to a designated Grass Valley repair
depot. Call your Grass Valley representative for depot location.

Refer to the Contacting Grass Valley Group at the front of this document for
the Grass Valley Customer Service Information number.

Figure 6. Fuse and Voltage Testpoint Locations

FAULT (red)
COMM (yellow)

PWR (green)

1/2 amp

+5 V testpoint

Channel 1 lock (green)

Channel 2 lock (green)

125 V fuse

F2

8157_05

8912RDA/RDA-D Instruction Manual 15

Functional Description

Refer to the block diagram in Figure 7 while reading the following func­tional description.

Figure 7. 8912RDA Block Diagram

Single-channel

Unbal

Input 1

1

Bal

Unused

75 110

Bal

Unbal

T1

Reclocker

Microprocessor

Ch. 1
Lock

1

Out 1

3

Out 2

5

Out 3

7

Out 4
Out 5

2

Out 6

4

Out 7

6

Input 1

Input 2

Frame Bus

1

2

Unused

Dual-channel

75 110

Unbal

Bal

Bal

75 110

Unbal

Bal

Bal

Unbal

Unbal

T1

T2

Fault Pwr Comm

Reclocker

Reclocker

Microprocessor

Ch. 1

Lock

Single

Channel

Dual

Channel

Ch. 2

Lock

10

8

3
5

7
9

4
6
8

Out 8

Out 1a
Out 2b
Out 3c
Out 4d

Out 2a
Out 2b
Out 2c
Out 2d

Frame Bus

Fault Pwr Comm

AES Input

The input signals comes from the 50-pin connector, P1, in series with a DC
blocking capacitor and feeds a digital audio transformer, T1 or T2,
depending on the input. The output side of these transformers goes to the

16 8912RDA/RDA-D Instruction Manual

Outputs

Functional Description

differential line receiver in U6 or U7. Input for the channel is a balanced or
unbalanced input and therefore has selectable termination with option of
high input impedance.

U6 and U7 re-clock the data for its AES data stream. The control registers
of U6 and U7 are set to allow the entire AES3 signal with the channel status
bits to pass.

After it is reclocked, the serial data is routed to the quad EIA-485 line
drivers (U9 and U10). Each line driver drives four balanced output lines,
which gives a fan-out of four per input.

The outputs feed a RC network that serves three purposes. The network
AC couples the signal, while creating an output resistance of 110 ohms to
match the cable impedance, limits the rise and fall times to meet the AES
specification and in conjunction with a ferrite bead, reduces EMI. Output
data comes directly from U6 and U7.

Controller

The controller is an OTP (one time programmable) P87LPC764. On power
up, the microcontroller configures U6 and U7 and reads an internal register
in U6 and U7 to determine if U6 or U7 is locked or not to the incoming AES
input. The controller provides communications between a host processor
and the 8912RDA-D.

Lock LED

The microcontroller drives the Lock LEDs, DS1 and DS2. If either LED is
on, it indicates that U6 or U7 were able to lock onto the incoming AES
signal.

Linear Regulator

The voltage regulators are monolithic integrated circuits with a fixed
voltage output of +5 volts. The regulators employ internal current limiting
and thermal shutdown. There are two +5V regulators, one for the input and
reclocking chip and another for the output drivers.

8912RDA/RDA-D Instruction Manual 17

18 8912RDA/RDA-D Instruction Manual

Index

B

backplane
block diagram

9

16

C

connectors
controller module
cooling

9, 10

8

8

D

documentation online

2

E

environmental

14

F

factory default
FAQ database
fault

11

frame 8, 14
frame capacity 8
frequently asked questions 2
fuse 15

11

2

M

module

controller
installation 8
power supply 8
slots 9

8

O

online documentation 2
operational modes 11
outputs 10, 14

balanced 14
specifications 14

P

performance 14
power 14
power supply 8

R

rear connectors 9
repair depot 15

S

slot 8

G

Grass Valley Group website 2

software download from web 2

T

I

impedance 7
indicators 11
input 10, 14

impedance 7
specification 14

8912RDA/RDA-D Instruction Manual 19

terminal 10
testpoints 15
troubleshooting 15

V

voltage 14
voltage tespoint 15

Index

W

web site documentation 2
web site FAQ database 2
web site Grass Valley Group 2
web site software download 2

20 8912RDA/RDA-D Instruction Manual