Grass Valley 8921DAC User Manual

8921DAC

4-CH AUDIO D-A CONVERTER WITH DELAY

Instruction Manual

SOFTWARE VERSION 1.0.0

071821401 JULY 2004

Contacting Grass Valley

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North America (800) 547-8949

Support: 530-478-4148

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Sales: (530) 478-3347 Support: (530) 478-3181

+852-2802-2996

Grass Valley P.O. Box 599000 Nevada City, CA 959597900 USA

www.thomsongrassvalley.com

The www

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.thomsongrassvalley.com web site offers the following:

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— Solutions to problems and troubleshooting efforts can be

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loaded.

2 8921DAC Instruction Manual

Preface

About This Manual

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

Frames Instruction Manual

8921DAC Instruction Manual 3

Preface

4 8921DAC Instruction Manual

Preface

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

8921DAC 4-Channel Audio D-A Converter

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

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

Module On-board Jumper Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Frame Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Module Placement in the Gecko 8900 Audio Frame . . . . . . . . . . . . . . . . . . . . . . . 9

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

Audio Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Audio Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Operation Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Configuration Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Audio Channel Pairing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Audio Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Audio Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Maximum Audio Analog Output Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Local Onboard Module Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Configuration Switches and Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

8921DAC Module Onboard Configuration Settings. . . . . . . . . . . . . . . . . . . . . 20

Remote Configuration and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

8921DAC Links and Web Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Status Web Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

I/O Config Web Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Functional View Web Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Module Configuration Web Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

E-MEM Web Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Slot Config Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Software Update Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Newton Control Panel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Status Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Frame Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Web Browser Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

SNMP Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Index

8921DAC Instruction Manual 5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Contents

6 8921DAC Instruction Manual

8921DAC 4-Channel Audio D-A Converter

Introduction

The 8921DAC provides conversion of two digital audio streams (balanced or unbalanced) to four balanced processed analog audio channels and four balanced buffered AES outputs. In addition to conversion, it offers independent delay controls for each channel to compensate for external video processing.

The 8921DAC features the following:

•Two AES digital audio inputs with:

• Support of both balanced (110 input stream

•Presence and error detection on each input pair

• Sample rate support of 32 kHz to 96 kHz

•Auto-detection of emphasis (50/15) with status report

• Sample word length of up to 24 bits

• Four balanced analog audio outputs with:

• 24-bit DAC D-to-A conversion

• Independent control of each analog audio channel including:

•Channel pairing

• Level adjustment

•Swapping, summation, phase inversion

•Delay up to 5.4 seconds

•Test tone generation

Ω

) and unbalanced inputs (75 Ω

) AES

• Four buffered balanced AES outputs as two groups of two AES streams for AES input dual distribution (without reclocking),

•Remote web browser and Newton Control Panel interface with the 8900NET module.

8921DAC Instruction Manual 7

Installation

Module On-board Jumper Settings

Installation of the 8921DAC module is a process of:

Setting on-board jumpers for desired input formats,

Placing the module in the proper audio frame slot, and

Cabling and terminating signal ports.

The 8921DAC module can be plugged in and removed from a Gecko 8900 audio frame with power on. When power is applied to the module, LED indicators reﬂect the initialization process (see Power Up on page 12).

The on-board jumpers shown in Figure 1 must be set for the following:

J10

• Local/Remote operation – set jumper J2 to LOC (pins 1-2) to lock out remote control or LOC/REM (pins 2-3) for both local and remote control.

•AES 1 and AES 2 input format – the input format for AES 1 and AES 2 must be set to either balanced (pins 2-3) or unbalanced (pins 1-2) with jumpers J9 (AES 2 – IN) and J10 (AES 1 – IN) depending on the input format desired.

Figure 1. On-Board Jumper Locations

LOC

LOC/REM

UNBAL BAL

AES 1 – IN

UNBAL BAL

AES 2 – IN

J10

Set jumper J2 to LOC (1-2) local only, remote lockout or LOC/REM (2-3) local and remote.

Set jumpers J9 and J10 to UNBAL (1-2) unbalanced or BAL (2-3) balanced to match input format.

8 8921DAC Instruction Manual

8214_04

Frame Capacity

The 8921DAC module can be installed in all Gecko 8900 audio 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. Audio Frame Power Capacity

Power (W) 100 100 100 Recommended Module Cooling (W) 30 90 90 8921DAC Modules 4 10 10

Installation

Capacity Calculated 8900TX Frame 8900TF Frame 8900TFN Frame

Note

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

Module Placement in the Gecko 8900 Audio Frame

There are ten cell locations in the audio frame to accommodate audio modules. These are the left ten locations. Refer to Figure 2.

The two cells 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 cell from the right is allocated for the Frame Monitor or 8900NET Network Interface module. These modules provide health monitoring and control options.

Figure 2. Gecko 8900 Series Frame

8157_04r1

8900 Audio Media Modules

Frame Monitor or

8900NET Network

Interface Module

8921DAC Instruction Manual 9

Power

Supplies

(only)

Installation

8900 module slots are interchangeable within the frame. There are audio connectors and BNCs 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 modules a Gecko 8900 audio frame can accept is ten. Figure 3 illustrates the rear connector plate for a Gecko 8900 audio frame.

Figure 3. Gecko 8900 Series Audio Frame Rear Connector

J10

J11

J12

J13

J14

IN 10

Cabling

J10

J11

J12

J13

J14

J10

J11

J12

J13

J14

IN 8

J10

J11

J12

J13

J14

J10

J11

J12

J13

J14

J10

J11

J12

J13

J14

J10

J11

J12

J13

J14

J10

J11

J12

J13

J14

J10

J11

J12

J13

J14

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.

Cabling to and from the module is done at the back of the Gecko 8900 audio frame as described below and shown in Figure 4 on page 11. The cabling information is also silkscreened on the back of the circuit board.

J10

J11

J12

J13

8157_02

J14

Audio Inputs

AES audio inputs can be balanced or unbalanced. Jumpers on the circuit board must be set for the desired format for AES 1 and AES 2. Refer to

Module On-board Jumper Settings on page 8.

Unbalanced Inputs

Unbalanced AES inputs are available at BNCs J11 (AES 1 A/B In) and J12 (AES 2 C/D In).

Balanced Inputs

Balanced AES inputs are available at three terminal connectors J9 (AES 1 A/B In) and J10 (AES 2 C/D In).

10 8921DAC Instruction Manual

Audio Outputs

Audio outputs are available in both analog audio and AES formats.

Analog Audio

There are four high impedance balanced analog audio outputs available from the module at three terminal connectors J1, J2, J3, and J4.

AES Audio Outputs

Four balanced AES outputs are available at three terminal connectors J5, J6, J7, and J8.

Figure 4. 8921DAC Rear Input/Output Connectors

+ -

Analog Audio

Out 1

Analog Audio

Out 3

AES

Out 1

AES

Out 2

AES 1

A/B In

AES 1

A/B In

Not Used

J11

J13

J10

J12

J14

Installation

Analog Audio

Out 2

Analog Audio

Out 4

AES

Out 3

AES

Out 4

AES 2

C/D In

AES 2

C/D In

Not Used

8214_01

8921DAC Instruction Manual 11

Power Up

The front LED indicators and conﬁguration switches are illustrated in

Figure 5. Upon power-up, the green PWR LED should light and the yellow

CONF LED should illuminate for a few seconds for the duration of module initialization.

Figure 5. LEDs and Conﬁguration Switches

FAULT (red) ERR AES1 (red)

COMM (yellow) ERR AES2 (red)

PWR (green)

1 2 3 4

CONFIG (yellow)

CHANNEL SELECT (green)

CH1

CH2

AUDIO LEVEL (green or red)

CH3

CH4

BANK 2 (yellow)

8214_06

12 8921DAC Instruction Manual

Operation Indicator LEDs

Refer to Figure 5 on page 12 and Table 2 for the name and meaning of each of the board edge operating indicators on the module circuit board.

Table 2. Board Edge LED Names and Meaning

LED Indication Condition

Off Normal operation.

FAULT

(red)

COMM

(yellow)

CONFIG

(yellow)

PWR

(green)

ERR AES1

(red)

ERR AES2

(red)

CH SEL 1–4

(green)

CH 1-4

AUDIO LVL

(green or red)

BANK 2

(yellow)

On continuously Module has detected an internal fault. (Refer to Service on page 43.)

Long Flash

Off No activity on frame communication bus.

3 Quick Pulses Locate Module command received by the module from a remote control system.

Short ﬂash Activity present on the frame communication bus.

Off Module is in normal operating mode.

On continuously Module is initializing, changing operating modes or programming hardware.

3 Quick Pulses Locate Module command received by the module from a remote control system.

Off No power to module or module’s DC/DC converter failed.

On continuously Normal operation, module is powered.

On No error detected for AES 1 A/B input. SRC A/B ready.

Off

On No error detected for AES 2 C/D input. SRC C/D ready.

Off

Off Channel 1-4 Digital processed audio (before DAC) level < – 40 dBFS

Red Channel 1-4 Digital processed audio (before DAC) level > – 40 dBFS but < – 0.5 dBFS

Green Channel 1-4 Digital processed audio (before DAC) level > – 0.5 dBFS

Off Bank 1 of Control rotary switch is active. On Bank 2 of Control rotary switch is active.

User conﬁguration problems. Input missing or not locked. Processor failed to load/conﬁgure or diagnostics failed on one or more devices.

One of the following errors detected for AES 1 A/B input: CRC, Input not present, PLL AES receiver not locked, Validity Bit set, Non-audio bit set, excessive parity error.

One of the following errors detected for AES 2 C/D input: CRC, Input not present, PLL AES receiver not locked, Validity Bit set, Non-audio bit set, excessive parity error.

Indicated input A-D is not selected for AES output channel selected with CONTROL rotary switch or audio channel 1-4 (after pairing) is not affected by adjustment selected with CONTROL rotary switch.

Indicated input A-D is selected for AES output channel selected with CONTROL rotary switch or audio channel 1-4 (after pairing) is affected by adjustment selected with CONTROL rotary switch.

Power Up

8921DAC Instruction Manual 13

Conﬁguration

The 8921DAC can be conﬁgured locally using on-board switches or remotely using the 8900NET network interface GUI or a Newton Control Panel.

Refer to the following sections for conﬁguration instructions:

•Conﬁguration Summary (page 14)

• Local On-board Module Conﬁguration (page 19)

•Remote Control and Monitoring (page 23)

•Newton Control Panel Conﬁguration (page 40)

Operation of these control types is explained in detail in their respective sections of this manual.

Conﬁguration Summary

This section provides a summary of all parameters that can be conﬁgured on the 8921DAC module. Use this section in conjunction with the speciﬁc conﬁguration method instructions for each conﬁguration type. Table 3 on

page 17 provides a summary in table format of all parameters and their

ranges, default values, and remote, local, and control panel function names and locations for setting each value.

Audio Channel Pairing

The four AES input channels can be arbitrarily recombined (routed) to any of the four analog output channels.

Audio Delay

Each analog audio output channel can be delayed individually or locked together in two groups. Outputs can be delayed up to 5 seconds.

Audio Processing

Audio processing can be performed on the four analog outputs to set the the gain of each output channel or channel pair and the output processing mode for each pair.

14 8921DAC Instruction Manual

Conﬁguration

Output Processing Modes

Each analog audio output pair (Channel 1/2 and Channel 3/4) can be set to one of the following output modes:

• 1, 2 (Pass) – the inputs selected for Channels 1 and 2 appear at the

analog audio output unmodiﬁed.

•– 1, – 2 (both phase inverted) – the inputs selected for Channel 1 and 2

are both inverted.

•– 1, 2 (Channel 1 Phase Inverted) – the input selected for Channel 1 is

inverted while Channel 2 is non-inverted.

• 1, – 2 (Channel 2 Phase Inverted) – the input selected for Channel 2 is

inverted while Channel 1 is non-inverted.

•1 + 2, (monaural sum) – the inputs selected for Channels 1 and 2 are

reduced in level by 6 dB, summed together, and output on both channels.

•1 + 2, 1 – 2 (MD D/E) – 1 + 2 to Channel 1; 1 – 2 to Channel 2, – 6 dB

mono sum to Channel 1 and – 6dB 1 – 2 decode/encode to Channel 2.

•– (1 +2) (1 + 2 to Both and Phase Invert) – the inputs selected for Chan-

nels 1 and 2 are reduced in level by 6 dB, summed together, inverted, and output on both channels.

•1 kHz (Tone) – a 1 kHz tone is put on both channels at the analog audio

output with a – 20 dBFS level.

• 400 Hz (Tone) – a 400 Hz tone is put on both channels at the analog

audio output with a – 20 dBFS level.

• Silence – digital silence is placed on both output channels.

•1 + 2, 3 – the two streams chosen for Channels 1 and 2 will be summed

and sent to the Channel 1 output. The Channel 3 audio from Analog Outputs 3/4 will be put on the Channel 2 output. In this mode, Analog Audio Outputs 3/4 will pass its inputs for Channels 3 and 4 as selected with the output processing control for Channels 3/4.

•1 + 2, 4 – the two streams chosen for Channels 1 and 2 will be summed

and sent to the Channel 1 output. The Channel 4 audio from Channels 3/4 will be put on the Channel 2 output. In this mode, Analog Audio Outputs 3/4 will pass its inputs for Channels 3 and 4 as selected with the output processing control for Channels 3/4.

• 1/2 ID – 1/2 identiﬁcation tone. A 1 kHz tone with a – 20 dBFS level

that is 2 second continuous tone on Channel 1 followed by a 6 second continuous tone on Channel 2 (keeps repeating).

8921DAC Instruction Manual 15

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