Related Manuals for GRASS VALLEY 8920ADC
Summary of Contents for GRASS VALLEY 8920ADC
- Page 1 8920ADC AUDIO A-TO-D CONVERTER Instruction Manual SOFTWARE VERSION 2.0.1A 071059503 JUNE 2005...
- Page 2 Germany, Europe +49 6150 104 782 +49 6150 104 223 Copyright © Thomson Broadcast and Media Solutions All rights reserved. Grass Valley Web Site www.thomsongrassvalley.com web site offers the following: — Current versions of product catalogs, brochures, Online User Documentation data sheets, ordering guides, planning guides, manuals, and release notes in .pdf format can be downloaded.
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Page 3: Table Of Contents
About This Manual ........... . . 8920ADC Analog Audio to AES/EBU Converter Introduction . - Page 4 Contents 8920ADC Instruction Manual...
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Page 5: Preface
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). 8920ADC Instruction Manual... - Page 6 Preface 8920ADC Instruction Manual...
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Page 7: 8920Adc Analog Audio To Aes/Ebu Converter
AES/EBU Converter Introduction The 8920ADC converts analog audio to digital audio. The right and left channel audio inputs enter via a terminal block-to-BNC adapter on the rear panel. A 48 kHz AES/EBU reference is required to lock the module, which is connected to the loop through input BNCs. -
Page 8: Installation
2. Cabling and terminating signal ports, and 3. Configuring the module. The 8920ADC module can be plugged in and removed from an 8900 Series frame with power on. When power is applied to the module, LED indica- tors reflect the initialization process (see Power Up on page 11). - Page 9 1. Insert the module, connector end first, with the component side of the module facing to the right and the ejector tab to the top. 2. Verify that the module connector seats properly against the backplane. 3. Press the ejector tab in to seat the module in place. 8920ADC Instruction Manual...
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Page 10: Cabling
CAUTION The input signal must be balanced. Connecting an un-balanced input signal at high signal levels may damage the input receivers. The 8920ADC can produce a full-scale output from an analog audio input signal level of +12 dBu to +28 dBu. -
Page 11: Power Up
On continuously neous CONF and FAULT LEDs on indicate FPGA load error. Flashing Indicates rate of change of paddle-controlled analog setting. No power to module or module’s DC/DC converter failed. (green) On continuously Normal operation, module is powered. 8920ADC Instruction Manual... - Page 12 AES/EBU serial digital output sampled at 48 kHz. See S/N specification for level. Audio inputs present Reference not present AES/EBU serial digital output sampled at approximately 47.992 kHz. Internal freerun clock rate. Audio inputs present Invalid reference input Invalid AES/EBU serial digital output. 8920ADC Instruction Manual...
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Page 13: Configuration
Configuration Configuration The 8920ADC can be configured locally using onboard switches or remotely using the 8900NET network interface GUI or a networked Newton Control Panel. Refer to the following sections for configuration instructions: • Configuration Summary (page • Local Onboard Module Configuration (page •... -
Page 14: Output Level Adjustment
Configuration Output Level Adjustment To correctly adjust the 8920ADC for your digital application, determine your maximum operating level and set the Coarse Level gain jumpers on the module circuit board as described below. This is the level above which digital clipping occurs. - Page 15 CAUTION Using a maximum level that is larger than the high end of the range setting jumper will result in a clipped waveform and high distortion. Use the next higher jumper setting that includes the maximum level and readjust the gain following the instructions above. 8920ADC Instruction Manual...
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Page 16: Configuring Output Mode
Configuration Configuring Output Mode The 8920ADC provides thirteen possible output configurations as shown Table 5. The module can be configured using the rotary switch shown in Figure 5 on page 18. To make a configuration setting, rotate the switch to the desired output configuration. - Page 17 Configuration Table 6 provides a complete summary of the 8920ADC processing func- tions and a comparison of the functionality available with each control type along with the ranges and default values for each parameter. Table 6. Summary of 8920ADC Configuration Functions...
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Page 18: Local Onboard Module Configuration
Configuration Local Onboard Module Configuration The 8920ADC module can be configured locally to set parameters using the jumpers, the rotary switch and two toggle switches shown in Figure 5. The CONF LED indicates status of the configuration process. These components perform the following: •... -
Page 19: Remote Configuration And Monitoring
The 8900NET module in the frame must be running software version 3.2.0 or higher for proper remote and control panel operation. Upgrade software and instructions for the 8900NET can be downloaded from the Grass Valley web site. Newton Control Panel Configuration A Newton Control Panel (hard or soft version) can be interfaced to the Gecko 8900 Series frame over the local network. -
Page 20: Web Browser Interface
Figure 7 on page 21. The 8900 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. 8920ADC Instruction Manual... - Page 21 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 8920ADC Instruction Manual...
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Page 22: 8920Dac Links And Web Pages
Configuration 8920DAC Links and Web Pages The 8900 GUI provides the following links and web pages for the 8920ADC module (Figure • Status – reports input and reference signal status and module informa- tion (page 23), • Audio Control and Status – select output format for module and adjust... - Page 23 Information about the module, such as part number, serial number, hard- ware revision and software and firmware versions are given in a read-only section at the bottom of the display. Figure 9. 8920ADC Status Web Page (Monitor Audio Inputs Enabled) 8920ADC Instruction Manual...
- Page 24 Unlocked (module does not detect a valid AES in reference signal). Use the following controls to set the parameters for the 8920ADC: • – Set the operational mode pulldown for the desired...
- Page 25 In Numeric mode only, values selected with the single or double arrow keys will be enabled immediately. All other display entries, including typed in values, require pressing Apply before the selection is enabled. Figure 10. 8920ADC Audio Control and Status Display 8920ADC Instruction Manual...
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Page 26: User Settings Web Page
• Set Monitor Audio Inputs to enable or disable the status reporting of the audio inputs. When set to disabled, the Input Signal(s) arrow on the Status web page will be greyed out. Figure 11. 8920ADC User Settings Web Page 8920ADC Instruction Manual... -
Page 27: Slot Config Web Page
Configuration Slot Config Web Page Use the Slot Config web page (Figure 12 on page 28) to perform the fol- lowing functions on the 8920ADC module: • – selecting the radio button flashes the yellow Locate Module Flash COMM and CONF LEDs on the front of the module so it can be located in the frame. - Page 28 Configuration Figure 12. 8920ADC Slot Config Web Page 8920ADC Instruction Manual...
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Page 29: Software Update Web Page
13) is not used to update 8920ADC soft- ware. For instructions on updating to the latest software, refer first to the 8920ADC Release Notes that accompany the software update for complete details. Currently, the only recommended method of software updating is done... -
Page 30: Specifications
Specifications Specifications Table 8. 8920ADC Specifications Parameter Value Analog Input Number of inputs Balanced stereo pair Connector type Terminal block Input impedance > 20 kΩ differential Input level range +12 to +28 dBu Common mode rejection > 65 dB 50 Hz to 20 kHz Differential DC 0.25 V maximum... -
Page 31: Service
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... -
Page 32: Status Monitoring
• Power Supply 1 and 2 health, • Fan rotation status, • Frame over-temperature condition, • Frame Bus fault (8900NET only), and • Module health bus. 8920ADC Instruction Manual... -
Page 33: Frame Alarm
• White = Not present. Status reporting for the frame is enabled or disabled with the configuration DIP switches on the 8900NET module. Some module status reporting items can also be enabled or disabled on individual configuration web pages. 8920ADC Instruction Manual... -
Page 34: Snmp Reporting
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 web page for the Frame, the... -
Page 35: Functional Description
Functional Description Functional Description The 8920ADC Converts an analog audio stereo pair to a 48 KHz AES/EBU signal. Refer to the block diagram in Figure 9 while reading the following functional description. Figure 9. 8920ADC Block Diagram Control bus from backplane... -
Page 36: Digital Reference Input
Power is fed from ±12 V rails of the frame’s switching power supply. Each stage of the module receives it’s own, separate, highly regulated and fil- tered power source. Two-stage regulation is used in the analog section of the ADC to reduce switching noise. 8920ADC Instruction Manual... -
Page 37: Index
CONF (configuring) LED configuration factory default jumpers Get Factory Defaults button LEDs local on-board graphical user interface (GUI) overview Grass Valley web site Remote, GUI summary table switches control panel impedance control summary table input overview loopthrough... - Page 38 SNMP reporting summary table enabling overview software download from web software update online documentation 8900-FLOAD-CBL operational conditions Software Update web page LED indications status monitoring operational mode Status web page remote control rotary switch summary table 8920ADC Instruction Manual...
- Page 39 Index termination toggle switches setting levels troubleshooting User Settings web page web browser overview web site documentation FAQ database Grass Valley software download 8920ADC Instruction Manual...
- Page 40 Index 8920ADC Instruction Manual...