Grass Valley 8921DAC User Manual

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8921DAC

4-CH AUDIO D-A CONVERTER WITH DELAY

Instruction Manual

SOFTWARE VERSION 1.0.0

071821401 JULY 2004

Contacting Grass Valley

Region Voice Fax Address Web Site

North America (800) 547-8949

Support: 530-478-4148

Paciﬁc Operations +852-2585-6688

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Grass Valley Web Site

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:

— Current versions of product catalogs, brochures, data sheets, ordering guides, planning guides, manuals, and release notes in .pdf format can be downloaded.

FAQ Database

— Solutions to problems and troubleshooting efforts can be

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

Software Downloads

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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

Conﬁguration

The Channel 3/4 output can be set to one of the following output modes:

• 3, 4 (Pass) – the inputs selected for Channels 3 and 4 appear at the analog audio output unmodiﬁed.

•– 3, – 4 (both phase inverted) – the inputs selected for Channels 3 and 4 are both inverted.

•– 3, 4 (Channel 3 Phase Inverted) – the input selected for Channel 3 is inverted while Channel 4 is non-inverted.

• 3, – 4 (Channel 4 Phase Inverted) – the input selected for Channel 4 is inverted while Channel 3 is non-inverted.

•3 + 4, (monaural sum) – the inputs selected for Channel 3 and 4 are reduced in level by 6 dB, summed together, and output on both channels.

•3 + 4, 3– 4 (MD D/E) – 3 + 4 to Channel 1; 3 – 4 to Channel 2, – 6 dB mono sum to Channel 3 and – 6dB 3 – 4 decode/encode to Channel 4.

•– (3 + 4) (3 + 4 to Both and Phase Invert) – the inputs selected for Channels 3 and 4 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.

• 3/4 ID – Channel 3/4 identiﬁcation tone. A 1 kHz tone with a – 20 dBFS level that is 2 second continuous tone on Channel 3 followed by a 6 second continuous tone on the Channel 4 (keeps repeating).

Gain Controls

The gain of the four audio outputs can be adjusted from –40 to + 6 dB. Each channel output can be adjusted individually or locked together in two groups (Channel 1/2 and Channel 3/4).

Maximum Audio Analog Output Levels

Controls are provided for setting the maximum analog audio output levels from 0 to + 24 dBu.

16 8921DAC Instruction Manual

Function

Type

Input to Channel 1 AES1 A

Input to Channel 2 AES1 B

Input to Channel 3 AES2 A

Input to Channel 4 AES2 B

Delay Channel 1

Delay Channel 2

Delay Channel 3

Delay Channel 4

Delay Channel 1/2

Delay Channel 3/4

Gain Channel 1

Gain Channel 2

Gain Channel 3

Gain Channel 4

Gain Channel 1/2

Gain Channel 3/4

Default

0 sec

0 dBu

Conﬁguration

Table 3 provides a complete summary of the 8921DAC functions and a

comparison of the functionality available with each control type along with the ranges and default values for each parameter.

Table 3. Summary of 8921DAC Conﬁguration Functions

Range/Choice

Resolution

AES1 A AES1 B AES2 A AES2 B

0 - 5.46 sec

(2 msec steps)

– 40 to +6 dBu

(0.1 dB steps)

Web Page/

Function Name

Audio Channel Pairing/

Assign Channel 1

Audio Channel Pairing/

Assign Channel 2

Audio Channel Pairing/

Assign Channel 3

Audio Channel Pairing/

Assign Channel 4

Audio Delay/

Channel 1 Delay (ms)

Audio Delay/

Channel 2 Delay (ms)

Audio Delay/

Channel 3 Delay (ms)

Audio Delay/

Channel 4 Delay (ms)

Audio Delay/ Channel 1 or 2 Delay (ms) Select

Locked

checkbox

Audio Delay/

Channel 3 or 4 (ms)

Select

Locked

checkbox

Audio Proc/

Channel 1 Gain (dB)

Audio Proc/

Channel 2 Gain (dB)

Audio Proc/

Channel 3 Gain (dB)

Audio Proc/

Channel 4 Gain (dB)

Audio Proc/

Channel 1 or 2 Gain (dB)

Select

Locked

checkbox

Audio Proc/

Channel 3 or 4 Gain (dB)

Select

Locked

checkbox

Rotary Switch

Bank/Setting

1:7 Ch1 Sel

1:8 Ch2 Sel

1:9 Ch3 Sel

1:A Ch4 Sel

2:7 Ch1 Dly

2:8 Ch2 Dly

2:9 Ch3 Dly

2:A Ch4 Dly

2:B

2:C

2:3 Ch1 Gain

2:4 Ch2 Gain

2:5 Ch3 Gain

2:6 Ch4 Gain

2:1

2:2

Control

Panel

Mnemonic

N/A

Notes/

Conditions

Route AES inputs to Analog outputs

Locked

boxes must be unchecked on web pages.

boxes

Locked

must be checked on web pages.

Locked

boxes must be unchecked on web pages.

boxes

Locked

must be checked on web pages.

8921DAC Instruction Manual 17

Conﬁguration

Table 3. Summary of 8921DAC Conﬁguration Functions

Function

Type

Channel 1/2 Processing 1, 2

Channel 3/4 Processing 3, 4

Max Level Audio Out 1

Max Level Audio Out 2

Max Level Audio Out 3

Max Level Audio Out 4

Max Level Audio Out 1/2

Max Level Audio Out 3/4

Recall Factory Defaults – See above

Save/Recall User Settings – –

Default

+ 24 dBu

Range/Choice

Resolution

1, 2

– 1, – 2 S1 AA 1/2:1

– 1, 2 S1 AA 1/2:2 1, – 2 S1 AA 1/2:3

1 + 2 (– 6 dB) S1 AA 1/2:4

1 + 2, 1 – 2 S1 AA 1/2:5

– (1 + 2) S1 AA 1/2:6

1 kHz S1 AA 1/2:7

400 Hz S1 AA 1/2:8 Silence S1 AA 1/2:9 1 + 2, 3 S1 AA 1/2:A 1 + 2, 4 S1 AA 1/2:B

1/2 ID S1 AA 1/2:E

3, 4

– 3, – 4 S2 AA 3/4:1

– 3, 4 S2 AA 3/4:2 3, – 4 S2 AA 3/4:3

3 + 4 S2 AA 3/4:4

3 + 4, 3 – 4 S2 AA 3/4:5

– (3 + 4) S2 AA 3/4:6

1 kHz S2 AA 3/4:7

400 Hz S2 AA 3/4:8 Silence S2 AA 3/4:9

3/4 ID S2 AA 3/4:E

0 – + 24 dBu

(0.1 dB steps)

Web Page/

Function Name

Audio Proc/

Processing pulldown for

J1 and J2

Audio Proc/

Processing pulldown for

J3 and J4

Analog Audio Outputs/

Max Output Level 1

Analog Audio Outputs/

Max Output Level 2

Analog Audio Outputs/

Max Output Level 3

Analog Audio Outputs/

Max Output Level 4

Analog Audio Outputs/ Max Out put Levels 1 or 2 Select

Locked

checkbox

Analog Audio Outputs/ Max Out put Levels 3 or 4 Select

Locked

checkbox

E-MEM/

Default

Save

button

E-MEM/

Recall

Settings button

User

Rotary Switch

Bank/Setting

S1 AA 1/2:0

S2 AA 3/4:0

1:3 Ch1 OutLvl

1:4 Ch2 OutLvl

1:5 Ch3 OutLvl

1:6 Ch4 OutLvl

1:1

1:2

2:F N/A See Default column

1:E N/A

Control

Panel

Mnemonic

Out1, 2Proc (See Range

Choices column)

Out3,4Proc (See Range

Choices column)

N/A

Notes/

Conditions

Set output processing mode for Channel 1/2

Set output processing mode for Channel 3/4

Locked

boxes must be unchecked on web pages.

Locked

boxes must be checked on web pages.

18 8921DAC Instruction Manual

Local Onboard Module Conﬁguration

The 8921DAC module can be conﬁgured and operated locally using the rotary and paddle switches on the front edge of the module (Figure 6).

Figure 6. Module Jumpers and Switches for Local Conﬁguration

Channel select

1 2 3 4

Conﬁguration

AA 1/2 Mode Switch

AA 3/4 Mode Switch

CONTROL Switch

BANK 2 LED

Paddle Swtich

Conﬁguration Switches and Controls

The switches available for local conﬁguration are described below. Refer to

Figure 6 for the following descriptions:

• MODE and CONTROL (rotary) switches — Three rotary hex switches are present on the front edge of the module, AA (Analog Audio) 1/2 MODE, AA 2 MODE, and CONTROL.

The AA 1 and AA 2 MODE rotary switches select the output mode for each analog audio pair from output processing settings. Local settings for each output mode are given in Table 5 on page 22.

The CONTROL switch is used to set the available module parameters in conjunction with the CONTROL paddle switch. It addresses two banks of functions; each bank has 16 possible positions (0 through 9 and A through F). Not all positions are used. The next bank of functions is accessed each time the CONTROL switch makes a complete revolution past zero (or back through F). While in Bank 1, a complete revolution past zero accesses Bank 2; while in Bank 2, a complete revolution past zero accesses Bank 1 again. The yellow BANK 2 LED indicates which bank is currently being accessed.

8214_05

Note The CONTROL rotary switch should be kept in position 0 in any bank (parked)

when not in use to avoid any inadvertent change in conﬁguration. Position 0 in each bank is inactive.

8921DAC Instruction Manual 19

Conﬁguration

•BANK 2 (second Function) yellow LED – when off, indicates that the rotary switch is addressing the ﬁrst bank of functions. When on, indicates that the rotary switch is addressing the second bank of functions.

• CONTROL (paddle) switch – actuates or selects the desired setting for the selected function when the switch is held momentarily in either the up or down position.

• CONF (conﬁguring) yellow LED – when on, indicates the module is programming hardware.

8921DAC Module Onboard Conﬁguration Settings

To make a conﬁguration setting:

1. Rotate the CONTROL rotary switch to Bank 1 (BANK 2 LED off) or

Bank 2 (BANK 2 LED on) and to the desired function within that bank according to Table 4 on page 21.

2. Move the paddle switch to the up or down position and hold

momentarily to set the desired function (refer to Table 4 on page 21).

Note Holding the paddle switch in the up or down position for more than a half

second will automatically accelerate through the value range for parameters with 256 or more values. The full range can be accessed in about 10 seconds.

20 8921DAC Instruction Manual

Table 4. CONTROL Rotary and Paddle Switch Functions

Conﬁguration

Rotary

Switch

Setting

Bank 1 (BANK 2 LED off)

0– –Default position for normal operation (paddle disabled. 1 Increase Decrease Adjust maximum output level for Channel 1 and 2 together. 2 Increase Decrease Adjust maximum output level for Channels 3 and 4 together. 3 Increase Decrease Adjust maximum output level for Channel 1 separately. 4 Increase Decrease Adjust maximum output level for Channel 2 separately. 5 Increase Decrease Adjust maximum output level for Channel 3 separately. 6 Increase Decrease Adjust maximum output level for Channel 4 separately. 7 Increment input # Decrement input # Select input AES stream to be used for Channel 1 output. 8 Increment input # Decrement input # Select input AES stream to be used for Channel 2 output. 9 Increment input # Decrement input # Select input AES stream to be used for Channel 3 output.

Bank 1 (BANK 2 LED off)

A Increment input # Decrement input # Select input AES stream to be used for Channel 4 output.

B – D Currently not used (paddle disabled)

E Recall Save Save and recall current user settings. F Recall – See Table 3 on page 17 for factory default values

Bank 2 (BANK 2 LED on)

0– –Default position for normal operation (paddle disabled). 1 Increase Decrease Adjust output gain of both Channel 1/2 together. 2 Increase Decrease Adjust output gain of both Channel 3/4 together. 3 Increase Decrease Adjust output gain of Channel 1. 4 Increase Decrease Adjust output gain of Channel 2 5 Increase Decrease Adjust output gain of Channel 3. 6 Increase Decrease Adjust output gain of Channel 4. 7 Increase Decrease Adjust delay of Channel 1. 8 Increase Decrease Adjust delay of Channel 2. 9 Increase Decrease Adjust delay of Channel 3.

Bank 2 (BANK 2 LED on)

A Increase Decrease Adjust delay of Channel 4. B Increase Decrease Adjust delay of Channel 1/2 together.

C Increase Decrease Adjust delay of Channel 3/4 together.

D-E Currently not used (paddle disabled)

F Recall – Recall defaults

Preserves gain offsets between channels.

Paddle

Switch Up

Paddle

Switch Down

Function Description

8921DAC Instruction Manual 21

Conﬁguration

Set Output Processing Modes

Two rotary switches are provided on the front edge of the module for setting the desired output processing mode for Channel 1/2 (AA 1/2 – SW1) and Channel 3/4 (AA 3/4 – SW2). Refer to Output Pro-

cessing Modes on page 15 for an overview of each mode.

Table 5. AA 1/2 and AA 3/4 Mode Switch Settings

Position Channel 1 Processing Mode Channel 2 Processing Mode

0 1, 2 (Pass) 3, 4 (Pass) 1 –1, – 2 –3, – 4 2– 1, 2 – 3, 4 3 1, – 2 3, – 4 41 + 2 (– 6 dB) 3 + 4 (– 6 dB) 51 + 2, 1 – 2 (MS D/E) 3 + 4, 3 – 4 (MS D/E) 6– (1 + 2) – (3 + 4) 71 kHz 1 kHz 8 400 Hz 400 Hz 9 Silence Silence A1 + 2, 3 3, 4 B1 + 2, 4 3. 4 C 1, 2 3, 4 D 1, 2 3, 4 E 1/2 ID 3/4 ID F 1, 2 3, 4

22 8921DAC Instruction Manual

Remote Conﬁguration and Monitoring

8921DAC conﬁguration and monitoring can be performed using a web browser GUI interface when the 8900NET Network Interface module is present in the audio frame (Gecko 8900TFN-A frame). This section describes the GUI access to the module conﬁguration functions. For Newton Control Panel information, refer to Newton Control Panel Conﬁgu-

ration on page 40.

For remote access, make sure the jumper block on the module is set for both Local and Remote access (Figure 6 on page 19).

Refer to the 8900NET Network Interface Module Instruction Manual for information on the 8900NET Network Interface module and setting up and operating the Gecko 8900 frame network.

Note For optimal performance and access to the latest features, it is recommended

that the 8900NET module be updated to the latest software release. Check the Grass Valley web site for the current 8900NET software.

Refer to the Frame Status web page shown in Figure 7 on page 24. The 8900 audio modules can be addressed by clicking either on a speciﬁc module icon in the frame status display or on a module name or slot number in the link list on the left.

Conﬁguration

Note The physical appearance of the menu displays on the web pages shown in

this manual represent the use of a particular platform, browser and version of 8900NET module software. They are provided for reference only. Displays will differ depending on the type of platform and browser you are using and the version of the 8900NET software installed in your system. This manual reﬂects the use of version 3.2.2 8900NET software.

Use the Refresh button to update the display (available with 8900NET software version 3.0 and later).

For information on status and fault monitoring and reporting shown on the Status page, refer to Status Monitoring on page 44.

8921DAC Instruction Manual 23

Conﬁguration

Figure 7. Frame Status Web Page

The Links section lists the frame and its current modules. The selected link's Status page is first displayed and the sub-list of links for the selection is opened. The sub-list allows you to select a particular information page for the selected device.

Content display section displays the information page for the selected frame or module (frame slot icons are also active links).

Refresh button for manual update of page

8214_09

24 8921DAC Instruction Manual

8921DAC Links and Web Pages

The 8900 GUI provides the following links and web pages for the 8921DAC module (Figure 8):

• Status – reports input and reference signal status and module informa-

tion (page 26)

• I/O Conﬁg – shows a graphic representation of inputs and outputs to

the module (page 27)

• Functional View – shows a block diagram of the module with links to

each conﬁguration page (page 28),

•Module Conﬁguration pages for setting up the module (page 29)

• E-MEM – provides Learn and Recall functions for an E-MEM register

along with

• Slot Conﬁg – provides a Locate Module function and Slot Memory

(page 37)

• Software Update – allows updating of software from a CD-ROM or the

web site (page 39)

Save to and Load from ﬁle operations (page 34)

Conﬁguration

Figure 8. 8921DAC Web Page Links

8921DAC Instruction Manual 25

Conﬁguration

Use this link

Status Web Page

The Status web page (Figure 9) shows the signal status of the input AES 1 and AES 2 audio, AES outputs, analog audio outputs, and frame bus communication. Color coding of the display indicates the signal status. Refer to

Status Monitoring on page 44 for an explanation of the color coding.

Information about the module, such as part number, serial number, asset tag number, hardware revision and software and ﬁrmware versions are given in a read-only section at the bottom of the display. Enabled options are also reported if applicable.

Clicking on the underlined link for AES Input 1, AES Input 2, AES outputs, or Analog Audio Outputs will take you to the I/O Conﬁg page.

Clicking on the 8921DAC model number in the center box will take you to the Functional View page illustrating a block diagram overview of the module with links to each of the conﬁguration pages.

Figure 9. 8921DAC Status Page

26 8921DAC Instruction Manual

Use this link

I/O Conﬁg Web Page

The I/O Conﬁg web page (Figure 10) shows the rear input and output connections to the module. Audio input and output status is reported by the color-coding of the corresponding blocks. Refer to Web Browser Interface on

page 45 for a complete explanation of status reporting.

Reporting of status for each input and output can be enabled or disabled by checking or unchecking he corresponding reporting will turn the corresponding box gray as shown in the example for Audio Out 3 in Figure 10.

Note Enabling an AES input is effective for both the 3-pin connector and the BNC.

Figure 10. 8921DAC I/O Conﬁg Web Page

Conﬁguration

Enabled checkbox. Disabling

8921DAC Instruction Manual 27

Conﬁguration

Use this link

Functional View Web Page

The Functional View web page (Figure 11) illustrates a block diagram of the 8921DAC module showing module functions and signal paths that are active or inactive in the current conﬁguration. It can be used as a link map for conﬁguring module functions.

Color coding indicates active functions and signal ﬂow. Grayed components are inactive due to hardware and/or software constraints. Underlined module functions are links to the web page for that function.

Use the Functional View to conﬁgure the 8921DAC module in the order of the signal ﬂow. Refer to each of the module conﬁguration web pages given in the next section.

Figure 11. 8921DAC Functional View Web Page

28 8921DAC Instruction Manual

Module Conﬁguration Web Pages

Module conﬁguration is provided for the following functions with the GUI interface:

•Audio Channel Pairing (page 30)

•Audio Delay (page 31)

•Audio Proc (page 32)

•Analog Audio Outputs (page 33) Read-only information about the module is given on the top of each page

including model name and description, frame and slot location and last E-MEM register recalled.

Conﬁguration

After making a parameter value change, click on in each selection.

Select the use the links on the left of the web page.

Click on the play.

Back, Functional View, or Next link to navigate to the next function or

Refresh button at the top of the display to update the entire dis-

Apply to activate settings

8921DAC Instruction Manual 29

Conﬁguration

Use this link

Audio Channel Pairing Web Page

The Audio Channel Pairing web page (Figure 12) allows routing the four AES audio input streams to be output on any of the four analog audio output channels 1, 2, 3, and 4.

Assign each AES input audio stream from the list on the left to Channel 1, 2, 3, or 4 by clicking on the corresponding radio button under the channel number. The default routing (AES 1 A to Channel 1, AES1 B to Channel 2, AES2 A to Channel 3, and AES2 B to Channel 4) is shown in the example.

Figure 12. 8921DAC Audio Channel Pairing Web Page

30 8921DAC Instruction Manual

Use this link

Conﬁguration

Audio Delay Web Page

The Audio Delay web page (Figure 13) provides delay controls for the Analog Audio output channels.

Use this page to do the following:

• Set delay for each output channel with the Delay controls at the bottom

of the page.

•Channel 1 and 2 and Channel 3 and 4 can also be adjusted in pairs by

selecting the corresponding for each channel pair. When locked, selecting either channel control in the pair will change the amount of delay for both channels by the same amount.

Figure 13. 8921DAC Audio Delay Web Page

Locked checkbox in the Delay Locking areas

8921DAC Instruction Manual 31

Conﬁguration

Audio Proc Web Page

The Audio Proc web page (Figure 14) reports the following for each output channel:

•Presence of processed audio output signal (True = > – 40 dBFS)

•Clip status of processed audio output signal (True = > – 0.5 dBFS)

Use this link

Use the Audio Proc page to make the following adjustments:

•Gain – adjust the output gain in dB for each channel with the corresponding

Gains can also be adjusted in pairs (Channel 1 and 2, Channel 3 and 4) by selecting the corresponding area and adjusting either channels are preserved for each channel (except when the limits are reached).

•Processing – set the output processing mode for Analog Audio Out Channel 1/2 (rear connectors J1 and J2) and Analog Audio Out Channel 3/4 (rear connectors J3 and J4) from the corresponding Processing pulldown. Refer to Output Processing Modes on page 15 for an overview of each output processing mode.

Figure 14. 8921DAC Audio Proc Web Page

Gain controls.

Locked checkbox in the Gain Locking

Gain control in the pair. Gain offsets between

32 8921DAC Instruction Manual

Conﬁguration

Analog Audio Outputs Web Page

Use the Analog Audio Outputs web page (Figure 15) to set the maximum output levels for Audio Out 1 – 4:

•Max Output Level – adjust the maximum output level in dBu for each

channel with the corresponding

Max Output Level controls.

Use this link

Output levels can also be adjusted in pairs (Channel 1 and 2, Channel 3 and 4) by selecting the corresponding Output Locking area and adjusting either pair. Level offsets between channels are preserved for each channel (except when the limited are reached).

Figure 15. 8921DAC Analog Audio Outputs Web Page

Locked checkbox in the Max

Max Output Level control in the

8921DAC Instruction Manual 33

Conﬁguration

E-MEM Web Page

The E-MEM web page (Figure 16) provides local operations for learning and recalling the current user conﬁguration. File operations are also available for saving or loading the saved ﬁles to and from a hard disk or other accessible media.

Local Operations

Use this link

To save the current module conﬁguration to an E-MEM register stored on the 8921DAC module, select the in the Local Operations E-MEM register by selecting the

Figure 16. 8921DAC E-MEM Web Page (Standard View)

Learn button. Recall a conﬁguration stored

Recall button.

File Operations

Module conﬁgurations can also be saved and recalled to/from a ﬁle for storage in another location outside of the frame.

To save the current conﬁguration to a ﬁle:

1. Select the Save to... button.

2. This will bring up a File Download screen.

3. Select the Save button.

34 8921DAC Instruction Manual

Conﬁguration

4. In the resulting Save As dialog box (Figure 17), the default ﬁle name can

be changed to an identifying name for the ﬁle, such as Audio_Studio_1. Browse to the folder where you want to save the conﬁguration and select

Save. The ﬁle saves as a .mcm ﬁle type.

Figure 17. E-MEM Save to Operation

8921DAC Instruction Manual 35

Conﬁguration

To load a saved ﬁle from a location outside of the frame

1. Select the Load from ... button under File Operations.

This will bring up the Load Current Conﬁg page (Figure 18).

2. Browse to the location of the ﬁle you wish to load and select the ﬁle.

Select the the Enter ﬁlename box.

3. Once the correct path and ﬁlename is loaded, select the Load button on

the Load E-MEM page.

4. This will place the recalled conﬁguration from the ﬁle into a module

5. Select Recall to apply the new settings.

Figure 18. Load Current Conﬁg Page

Open button to load the ﬁle or enter the ﬁlename and path in

Recall Defaults

Default settings for the module can be recalled by selecting the Recall

Defaults button. The defaults will revert to the settings given in the Default

column in Table 3 on page 17.

36 8921DAC Instruction Manual

Use this link

Slot Conﬁg Page

Use the Slot Conﬁg page (Figure 19 on page 38) to perform the following functions on the 8921DAC module:

•

Locate Module – selecting Flash in the Locate Module pulldown ﬂashes the

yellow COMM and CONF LEDs on the front of the module so it can be located in the frame.

•

Slot Identiﬁcation – You may identify the module by typing a speciﬁc

name in the module and travels with the 8900NET module if it is moved to another frame. Select

Conﬁguration

Name ﬁeld. The assigned name is stored on the 8900NET

Default to enter the factory default module name.

An asset identiﬁer may be entered into the purposes (functionality requires 8900NET software 3.2.1 or later). The asset tag will appear on the Status web page and can be used in the Inventory function with the NetConﬁg Network application.

•

Slot Memory – the slot conﬁguration for each media module is automati-

cally saved periodically (once an hour) to the 8900NET module in that frame. You may also select the save the current conﬁguration for this slot. The conﬁguration is saved on the 8900NET module. If the 8900NET module is removed or powered down, the stored conﬁgurations are not saved.

When the ration saved to this slot is saved as slot memory. When the current module is removed and another module of the same type is installed, the conﬁguration saved to the 8900NET module will be downloaded to the new module. The box must be checked before the current module with the saved conﬁguration is removed.

•

Frame Heath Reporting – this function is not used on the current version of

8900NET software which controls this page.

•

Hardware Switch Controls – a read-only status report of 8900NET module

switch settings for Module Status Reporting and Asynchronous Status Reporting. These functions must be enabled for the following Slot SNMP Trap Reports to function.

Restore upon Install box has been checked, the current conﬁgu-

Learn Module Conﬁg button at any time to

Asset Tag ﬁeld for inventory

•

Slot SNMP Trap Reports – displayed only when the SNMP Agent software

has been installed on the 8900NET module. Slot SNMP traps can be enabled only when the hardware switches for Module Fault reporting and Asynchronous Status reporting are in enabled on the 8900NET module (dipswitch S1 segment 5 and dipswitch S2 segment 1).

The enabled SNMP traps will be reported to any SNMP manager that is identiﬁed as an SNMP Report Destination in 8900NET conﬁguration. Trap severity is read-only hard-coded information that is interpreted and responded to by the SNMP Manager software conﬁguration.

SNMP reporting can be also be disabled for individual signal inputs on the I/O Conﬁg web page.

8921DAC Instruction Manual 37

Conﬁguration

Figure 19. 8921DAC Slot Conﬁg Page

38 8921DAC Instruction Manual

Use this link

Conﬁguration

Software Update Page

The Software update page (Figure 20) allows updating of software from remote locations such as a CD-ROM or the Grass Valley web site. For instructions on updating to the latest software, refer ﬁrst to the 8921DAC Release Notes that accompany the software update for compete details.

Updating with this method requires the use of an ftp server application available from the Grass Valley web site. Refer to the 8900NET Network Interface Instruction Manual for instructions for installing and using the ftp server application.

Software updates may also be performed using the NetConﬁg application available from Grass Valley. Refer to the NetConﬁg Instruction Manual for more information.

Figure 20. 8921DAC Software Update Page

8921DAC Instruction Manual 39

Conﬁguration

Newton Control Panel Conﬁguration

A Newton Control Panel can be interfaced to the Gecko 8900 Series frame over the local network to control a number of module conﬁguration and control parameters. The available control panel controls for the 8921DAC are listed in Table 3 on page 17.

An example of the Newton Conﬁgurator is shown in Figure 21.

Figure 21. Newton Conﬁgurator Example

Refer to the documentation that accompanies the Newton Control Panel for installation, conﬁguration, and operation information.

40 8921DAC Instruction Manual

Speciﬁcations

Table 6. 8921DAC Speciﬁcations

Parameter Value Digital Inputs

Balanced inputs

Audio input signal type AES3-1997 Number of inputs 2 balanced Input impedance 110 Ω ± 10% Connector type 3-pin terminal blocks J9 (AES 1 A/B In) and J10 (AES 2 C/D In) Common mode range ± 10V Differential voltage range 200 mV to 10 V p-p Sampling rates supported 32 kHz to 96 kHz Input return loss > 20 dB (100 kHz to 10 MHz)

Unbalanced inputs

Audio input signal type AES3id-1995 Number of inputs 2 unbalanced Input impedance 75 Ω ± 10% Connector type 2 BNCs J11 (AES 1 A/B In) and J12 (AES 2 C/D In) Differential voltage range 200 mV to 1.2 V p-p Sampling rates supported 32 kHz to 96 kHz Input return loss > 20 dB (100 kHz to 10 MHz)

Digital Audio Outputs

Digital audio output signal AES3-1992 Number of outputs 4 Output impedance 110 Ω ± 20%

Connector type

Output rise/fall time 5 ns to 30 ns with 110 Ω load Differential voltage range 3.4 V p-p ± 0.2 V @ 110 Ω Sampling rates supported 32 kHz to 96 kHz (AES input sample rate) Output return loss > 15 dB (100 kHz to 6 MHz)

Analog Audio Output Signal

Number of outputs 4 channels, 1 output each channel Output impedance ≤ 5Ω single-ended and ≤ 10 Ω differential Output level (0 dBFS input) 0 dBu to + 24 dBu maximum Output impedance ≤ 10 Ω single-ended and ≤ 20 Ω differential

Connector type

Maximum differential DC on output < ± 50 mV Output to output isolation > 95 dB

Maximum drive capability THD+N < 0.012%

3-pin terminal block (AES Out 1 – J5, AES Out 2 – J7, AES Out 3 – J6, AES Out 4 – J8)

3-pin terminal block (Audio Out 1 – J1, Audio Out 2 – J2, Audio Out 3 – J3, Audio Out 4 – J4)

+ 24 dBu into 10 k Ω load + 18 dbU into 600 Ω load

Speciﬁcations

8921DAC Instruction Manual 41

Speciﬁcations

Table 6. 8921DAC Speciﬁcations

Parameter Value Performance (+ 24 dBu into 10 k Ω load unless otherwise stated)

Signal/noise ratio

THD + noise (swept, 20 to 20 kHz)

Interchange crosstalk < – 100 dB, 20 Hz to 20 kHz Intermediation distortion < 0.015% CCIF two-tone test

Frequency response ± 0.1 dB, 20 Hz to 20 kHz, relative to 1 kHz @ 48 kHz to 96 kHz De-emphasis (32 kHz to 48 kHz) 50/15 µs pre-emphasis Automatic, Professional Mode only, no de-emphasis at

Minimum delay from input to output 3.8 msec @ 48 kHz in/out sample rate Delay at maximum delay setting 5.4 seconds @ 48kHz in/out sample rate Static withstand 5 Kiev (330 Ω, 150 if) for any input or output Factory calibration 0 dBFS = + 24 dBu ± 0.1 into 10 k Ω

Environmental

Frame temperature range See frame speciﬁcation Operating humidity range 0 to 90% non-condensing Non-operating temperature – 10 to 70 degrees C

Mechanical

Frame type Gecko 8900 Audio

Power

Power consumption < 7 W, 500 mA @ + 12 V, 150 mA @ – 12V

> 104 dB unwatched 22 kHz ﬁlter > 107 dB “A” weighted

< 0.012% 22 kHz ﬁlter, + 24 dBu (< – 78 dB), typical (1 kHz): < – 87 dB

(– 76 dB) 19 kHz and 20 kHz tones

output

Mode and control switches set to 0

42 8921DAC Instruction Manual

Service

The 8921DAC 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 signal present LEDs.

•Verify power at the voltage testpoints (see Figure 22).

Note The 8921DAC module does not use fuses. It has an electronic circuit breaker

that protects against short circuits or excessive supply current with automatic restart after 150 ms. Current limits are set to 4 A on the + 12 V input and 2 A on the – 12 V input supply.

•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 Figure 5 for the location of PWR LED and Table 2 on page 13 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 at the front of this document for the Grass Valley Customer Service Information number.

Figure 22. 8921DAC Voltage Testpoint Locations

GRASS VALLEY 8921DAC AUDIO DAC W/DELAY 671-6497-

Voltage Test Points

+12V +5V +3.3V +2.5v +1.2v

-12V

8921DAC Instruction Manual 43

8214_04

Status Monitoring

This section provides a summary of status monitoring and reporting for a Gecko 8900 Series system. It also summarizes what status items are reported and how to enable/disable reporting of each item. There are a number of ways to monitor status of modules, power supplies, fans and other status items depending on the method of monitoring being used.

8900 Frame status will report the following items:

• Power supply health,

• Status of fans in the frame front cover,

•Temperature,

•Module health, and

• Frame bus status.

Module health status will report the following items:

• Internal module state (and state of submodule or options enabled) including conﬁguration errors (warning), internal faults, and normal operation (Pass).

LEDs

• Signal input states including valid/present (pass), not present or invalid (warning), not monitored, and not available (no signal inputs).

•Reference input states including locked/valid (pass), not locked/invalid (warning), and not monitored.

• Signal output states with reporting functionality (reference output).

LEDs on modules in the frame and on the front of the 8900TF/TFN frames indicate status of the frame and the installed power supplies, fans in the front covers, and modules. (The 8900TX-V/A frames have no LED indicators on the front cover.)

When a red FAULT LED is lit on a frame front cover, the fault will also be reported on the 8900NET or Frame Monitor module. The LEDs on the front of these modules can then be read to determine the following fault conditions:

• Power Supply 1 and 2 health,

• Fan rotation status,

• Frame over-temperature condition,

• Frame Bus fault (8900NET only), and

•Module health bus.

44 8921DAC Instruction Manual

Frame Alarm

Status Monitoring

In general, LED colors used on the frame and modules indicate:

•Green = normal operation, (Pass) or signal present, module locked.

•Red – On continuously = fault condition, ﬂashing = conﬁguration error.

•Yellow – On continuously = active condition (conﬁguration mode or

communication), ﬂashing in sequence = module locator function.

Status LEDs for this module are described in Operation Indicator LEDs on

page 13. LEDs for the 8900NET module are described in the 8900NET

Network Interface Instruction Manual.

A Frame Alarm connection is available on pins 8 and 9 of the RS-232 connector on the rear of the 8900 frame (Frame Monitor or 8900NET Network Interface module required). This will report any of the status items enabled with the 8900NET or Frame Monitor module conﬁguration DIP switch. Connection and use of the Frame Alarm is covered in detail in the 8900NET

Network Interface Instruction Manual.

Web Browser Interface

When the 8900NET module is installed in the frame, a web browser GUI can indicate frame and module status on the following web pages:

• Frame Status page – reports overall frame and module status in graph-

ical and text formats.

•Module Status page – shows speciﬁc input and reference signal status

to the module along with enabled options and module versions.

•A Status LED icon on each web page to report communication status

for the frame slot and acts as a link to the Status page where warnings and faults are displayed (8900NET version 3.0 or later).

In general, graphics and text colors used indicate the following:

•Green = Pass – signal or reference present, no problems detected.

•Red = Fault – fault condition.

•Yellow = Warning – signal is absent, has errors, or is mis-conﬁgured.

•Gray = Not monitored (older 8900 module).

•White = Not used.

Status reporting for the frame is enabled or disabled with the conﬁguration DIP switches on the 8900NET module. Most module status reporting items can be enabled or disabled on individual conﬁguration web pages.

8921DAC Instruction Manual 45

Status Monitoring

SNMP Reporting

The Gecko 8900 Series system uses the Simple Network Monitoring Protocol (SNMP) internet standard for reporting status information to remote monitoring stations. When SNMP Agent software is installed on the 8900NET module, enabled status reports are sent to an SNMP Manager such as the Grass Valley’s NetCentral application.

There are both hardware and software report enable switches for each report. Both must be enabled for the report to be sent. Software report switches are set on the 8900NET Conﬁguration page for the Frame, the 8900NET module, and each module slot. Refer to the 8900NET Network

Interface Instruction Manual for installation instructions.

46 8921DAC Instruction Manual

Index

Numerics

2ND LED 20 8900 frame

frame alarm module capacity 9 status reporting 44

8900NET module

installation

8921DAC features 7

analog audio outputs

levels, overview levels, remote control 33

levels, summary table 18 Analog Audio Outputs web page 33 Asset Tag

assignment audio channel pairing

local control

remote control 30

summary table 17 Audio Channel Pairing web page 30 audio delay

local controls

overview 14

remote control 31

summary table 17 Audio Delay web page 31 audio inputs

cabling

unbalanced, cabling 10 audio outputs

AES outputs

analog outputs 11 Audio Proc web page 32 audio processing

modes

overview 14

rotary switch setting table

remote controls 32 summary table 18

backplane 10 BANK 2 LED 13

CH SEL 1-4 LEDs 13 CH1-4 AUDIO LEV LEDs 13 COMM LED 13 CONF LED 13, 20 configuration

Local, onboard overview 14 Remote, GUI 23

summary table 17 connectors 10 control panel 40

mneumonics 17 controller module 9

documentation online 2

E-MEM

description

load from file 36 E-MEM web page 34 enable SNMP 46 environmental 42 ERR AES1 LED 13 ERR AES2 LED 13

8921DAC Instruction Manual 47

Index

factory defaults

local control remote control 36

summary table 17 FAQ database 2 FAULT LED

states

troubleshooting 44 Frame Controller module 9 Frame Status page 45 frequently asked questions 2 Function rotary switch

accessing banks Functional View web page 28 fuses 43

gain

local controls

overview 16

remote control 32

summary table 17 Gecko frame 9, 42 graphical user interface (GUI) 25 Grass Valley web site 2

slots 10 module health status 44 Module Status page 45

NetConfig

software updating Newton Control Panel 40

online documentation 2 output processing modes

Channel 1 and 2

Channel 3 and 4 16

power 42 power supply 9 PWR LED 13

rear connectors 10 Refresh button 23 repair depot 43 report enable switches 46

I/O Config web page 27 installation 8

LEDs

front edge Names and Meanings table 13

locate module 37

module

controller installation 9 power supply 9

48 8921DAC Instruction Manual

Slot Config web page 37 slot memory 37 SNMP reporting

enabling

overview 46 software download from web 2 Software Update web page 39 specifications 41 status monitoring 44 Status web page 26 switches

onboard control

testpoints 43 troubleshooting 43

voltage tespoints 43

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

Index

8921DAC Instruction Manual 49

Index

50 8921DAC Instruction Manual

Grass Valley 8921DAC User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

About This Manual

Contents

8921DAC 4-Channel Audio D-A Converter

Introduction

Installation

Module On-board Jumper Settings

Frame Capacity

Module Placement in the Gecko 8900 Audio Frame

Cabling

Audio Inputs

Audio Outputs

Power Up

Operation Indicator LEDs

Audio Channel Pairing

Audio Delay

Audio Processing

Maximum Audio Analog Output Levels

8921DAC Links and Web Pages

Status Web Page

Functional View Web Page

E-MEM Web Page

Software Update Page

Service

Status Monitoring

LEDs

Frame Alarm

Web Browser Interface

SNMP Reporting

Index