8921ADT 4-CH AUDIO A-D CONVERTER w/DELAY TRACK Instruction Manual SOFTWARE VERSION 1.0.
Contacting Grass Valley Region Voice Fax Address Web Site North America (800) 547-8949 Support: 530-478-4148 Sales: (530) 478-3347 Support: (530) 478-3181 www.thomsongrassvalley.com Pacific Operations +852-2585-6688 Support: 852-2585-6579 +852-2802-2996 Grass Valley P.O. Box 599000 Nevada City, CA 959597900 USA U.K.
Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8921ADT 4-Channel Audio A-D Converter with Delay Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Installation . . . . . . . . . . . . . . . .
Contents Frame Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Web Browser Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 SNMP Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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).
Preface 6 8921ADT Instruction Manual
8921ADT 4-Channel Audio A-D Converter with Delay Introduction The 8921ADT module offers four independent, audio A-D conversions on a single module. Four channels of analog audio are converted to two digital audio streams. Two forms of delay are provided—a fixed delay and a variable delay based on a signal from a video decoder with a frame synchronizer or from a frame sync card.
Installation Installation Installation of the 8921ADT module is a process of: 1. Setting on-board jumpers for desired output formats, 2. Placing the module in the proper audio frame slot, and 3. Cabling and terminating signal ports. The 8921ADT 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 14).
Installation Figure 1. On-Board Jumper Locations Set jumpers J2, J3, and J4 to BAL (1-2) balanced or UN (2-3) unbalanced to AES 1&2 UN match output format. LOC J11 0UT3 AES 1&2 0UT1 BAL UN BAL J4 Set jumper J11 to LOC (1-2) local only, remote lockout or LOC/REM (2-3) local and remote. J2 UN BAL LOC/REM J3 AES 1&2 0UT2 J11 J6 SAMPLE RATE J12 TRK OUT 48kHz J6 J12 TRK IN AES1 Leave jumper J12 set for sample rate of 48kHz (2-3). J3 Set jumper J5 for AES1 (1-2) or TRK IN (2-3) for BNC J11.
Installation Frame Capacity The 8921ADT module can be installed in all Gecko 8900-A audio frames but with varying maximum quantities determined by frame cooling capacity. Table 2 provides the power capacity, cooling capacity, and maximum module count for each frame type. Table 2.
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. A detail of the audio connector is given in Figure 4 on page 13. Figure 3.
Installation Cabling Cabling to and from the module is done at the back of the Gecko 8900 audio frame as described below. A number of jumpers on the module circuit board must first be set to assign connectors for the desired outputs (see Module On-board Jumper Settings on page 8). Analog Audio Inputs Four balanced analog audio inputs are provided at 3-pin mini-terminal strip audio connectors J7, J8, J9 and J10. Plastic strain reliefs are provided for connecting balanced audio connections.
Installation To use J11 and J12 as unbalanced audio outputs if a tracking input or output is not required, jumper J5 to pins 1-2 (AES1) and J6 to pins 1-2 (AES2). Refer to Figure 1 on page 9 and Tracking Input/Output on page 13. Figure 4.
Power Up 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.
Power Up Operation Indicator LEDs Refer to Figure 5 and Table 3 for the name and meaning of each of the board edge operating indicators on the module circuit board. Table 3. Board Edge LED Names and Meaning LED Indication Off FAULT (red) On continuously Long Flash Off COMM (yellow) 3 Quick Pulses Short flash Off CONFIG (yellow) PWR (green) Condition Normal operation. Module has detected an internal fault. (Refer to Functional Description on page 48.) User configuration problems.
Configuration Configuration The 8921ADT can be configured locally using onboard switches or remotely using the 8900NET network interface GUI or a networked control panel. Operation of these control types is explained in detail in their respective sections of this manual.
Configuration If you know the maximum signal level of your audio inputs, you can enter the value directly into the web page level adjustment fields. Refer to Analog Audio Inputs Page on page 35. For local control (no 8900NET module), you can adjust maximum input levels by metering the corresponding output with a digital audio meter.
Configuration Audio Processing Audio processing can be performed on the outputs of AES 1 and AES 2 to set the output processing mode, the output resolution, gain of each output stream, and the output sample rate with the Audio Proc controls. Output Processing Modes The AES 1 output can be set to one of the following output modes: 18 • A, B (Pass) – the inputs selected for A and B appear at the AES output unmodified.
Configuration The AES 2 output can be set to one of the following output modes: • C, D (Pass) – the inputs selected for C and D appear at the AES output unmodified. • – C, – D (both phase inverted) – the inputs selected for C and D are both inverted at the AES output. • – C, D (C Phase Inverted) – the input selected for the C channel is inverted while the D channel is non-inverted at the AES output.
Configuration Gain Adjustments Once the output mode for each AES output has been selected, the gain of the outputs can be adjusted from – 40 to + 6 dB in the audio processor as required. Each output can be adjusted individually or locked together in two groups, AES 1 A and B, and AES 2 C and D. AES Output Resolution The output resolution for AES 1and AES 2 can be set to either 20 or 24 bits. This is set locally during installation with on-board jumpers J13 (AES 1) and J14 (AES 2).
Configuration Reference Source The module can lock to an external reference or free run. The reference source can be selected with local or remote controls. If a reference signal is connected to the loop-through input, the reference source should be set to Reference In. If no external reference is used, or you don not wish to have the module lock to its reference input, set the module to Free Run.
Configuration Table 4 provides a complete summary of the 8921ADT functions and a comparison of the functionality available with each control type along with the ranges and default values for each parameter. Table 4.
Configuration Table 4.
Configuration Table 4.
Configuration Local Onboard Module Configuration The 8921ADT 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 AES 1 Mode Switch AES 2 Mode Switch BANK 2 LED Paddle Switch 8204_05 CONTROL Switch Configuration Switches and Controls The switches available for local configuration are described below.
Configuration • 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. 8921ADT 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. 2.
Configuration Table 5. CONTROL Rotary and Paddle Switch Functions Rotary Switch Setting Paddle Switch Up Paddle Switch Down Function Description Bank 2 (BANK 2 LED on) Bank 2 (BANK 2 LED on) 1 Preserves 0 – – Default position for normal operation (paddle has no effect). 1 Increase Decrease Adjust output gain of both Ch A and Ch B of AES 1 together.1 2 Increase Decrease Adjust output gain of both Ch C and Ch D of AES 2 together.1 3 Increase Decrease Adjust output gain of Ch A of AES 1.
Configuration Remote Configuration and Monitoring 8921ADT 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 remote access, make sure the jumper block on the module is set for both Local and Remote access (Figure 6 on page 25).
Configuration Figure 7. Frame Status 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).
Configuration 8921ADT Links and Web Pages The 8900 GUI provides the following links and web pages for the 8921ADT module (Figure 8): • Status – reports input and reference signal status and module information (page 31), • I/O Config – shows a graphic representation of inputs and outputs to the module and allows naming of each input (page 32), • Functional View – shows a block diagram of the module with links to each configuration page (page 33), • Module Configuration pages for setting up the module
Configuration Status Page Use this link The Status page (Figure 9) shows the signal status of the audio, reference, and AES 1 or Tracking inputs and the AES 1 and AES 2 and Tracking outputs. Color coding of the display indicates the signal status. Refer to Status Monitoring on page 51 for an explanation of the color coding. Information about the module, such as part number, serial number, hardware revision and software and firmware versions are given in a read-only section at the bottom of the display.
Configuration I/O Config Page Use this link The I/O Config page (Figure 10) shows the rear input and output connections to the module. Audio input and Reference In status is reported by the color-coding of the corresponding blocks. Grayed components are inactive due to hardware and/or software constraints. Refer to Web Browser Interface on page 52 for a complete explanation of status reporting. Note Output status is not reported in this application.
Configuration Functional View Page Use this link The Functional View page (Figure 11) illustrates a block diagram of the 8921ADT 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. Underlined module functions are links to the web page for that function. Use the Functional View to configure the 8921ADT module in the order of the signal flow.
Configuration Module Configuration Pages Module configuration is provided for the following functions with the GUI interface: • Analog Audio Inputs (page 35) • Audio Channel Pairing (page 36) • Audio Delay (page 37) • Audio Proc (page 38) 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 function recalled (E-MEM, File, or Defaults).
Configuration Analog Audio Inputs Page The Analog Audio Inputs page (Figure 12) reports the following for each of the analog audio inputs: Use this link • Presence of input signal (True = > – 40 DBFS) • Clip status of input signal (True = > – 0.5 dBFS). Set the maximum input level of each of the analog audio inputs from 0 to + 30 dBu with the Max Input Levels controls.
Configuration Audio Channel Pairing Page The Audio Channel Pairing page (Figure 13) allows routing the four audio input streams to be output on any of the four output channels AES 1 A and B, AES 2 C and D. Use this link Assign each input audio stream from the list on the left to AES 1 A or B or AES 2 C or D by clicking on the corresponding radio button under the AES output.
Configuration Audio Delay Page The Audio Delay page (Figure 14) provides delay controls for the AES 1 and AES 2 outputs. Use this page to do the following: • Use this link Enable auto tracking to an external tracking signal from an 8900FSS or 8981FS module input. Select the On checkbox to enable auto-tracking for either channel. The amount of auto tracking delay in ms will be shown in the Auto Tracking Delay boxes for both channels.
Configuration Audio Proc Page The Audio Proc page (Figure 15) reports the following for each AES output channel: Use this link • Presence of audio input signal (True = > – 40 dBFS) • Clip status of audio input signal (True = > – 0.5 dBFS) Use the Audio Proc page to make the following adjustments: • Processing – set the output processing mode for AES 1 and AES 2 from the corresponding Processing pulldown. Refer to Output Processing Modes on page 18 for an overview of each output processing mode.
Configuration E-MEM Page The E-MEM 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. Defaults can also be recalled from this page. Use this link Local Operations To save the current module configuration to the E-MEM register stored on the module, select the Learn button.
Configuration Figure 17. E-MEM Save to Operation 4. In the resulting Save As dialog box, 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.
Configuration To load a saved file from a location outside of the frame: 1. Select the Load from ... button under File Operations in the Current or E-MEM row. This will bring up the Load Current Config page (Figure 18) or the Load E-MEM page (not shown). 2. Browse to the location of the file you wish to load and select the file. Select the Open button to load the file or enter the filename and path in the Enter filename box. 3.
Configuration Slot Config Page Use the Slot Config page (Figure 19 on page 43) to perform the following functions on the 8921ADT module: • Locate Module – selecting the On pulldown flashes the yellow COMM and CONF LEDs on the front of the module so it can be located in the frame. Use this link • Slot Identification – You may identify the module by typing a specific name in the Name field.
Configuration Figure 19.
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 8921ADT Release Notes that accompany the software update for compete details. Use this link Updating with this method requires the use of an ftp server application available from the Grass Valley web site.
Configuration Control Panel Configuration An external control panel is available to interface over the network to the 8921ADT module. The configuration functions available with the Grass Valley Newton Control System are summarized in Table 4 on page 22. In addition, the Control Panel mnemonics that will appear with each available function are given in the table. Note Not all configuration parameters may be available with the Control Panel.
Specifications Specifications Table 7. 8921ADT Specifications Parameter Value Reference Input Number of inputs 1 loop-through Impedance 75 Ω Connector type BNC loop-through Input return loss > 40 dB 10 kHz to 10 MHz @ 75 Ω Common mode input voltage ± 1 V maximum Differential DC ± 0.
Specifications Table 7. 8921ADT Specifications Parameter Value Unbalanced (jumpers J2, J3, and J4 set to Un) Number of outputs 6 unbalanced (with cable adapter) plus 1 additional AES3id output for each AES stream if tracking input and output BNCs not used. Signal type AES3id-2001 Output voltage level 1 V p-p ± 0.
Functional Description Functional Description Refer to the block diagram in Figure 21 for the following functional description. The 8921ADT receives four channels of balanced analog audio differentially to reduce common mode interference. The audio inputs are converted into single-ended signals that feed a gain amplifier where the maximum input levels can be adjusted to just below the clip point for the analog to digital converter. Figure 21.
Functional Description The outputs from the gain amplifiers are converted back to a differential signal before being applied to the A-D converter inputs. The output of the A-D converter is a serial bit stream which is deserialized into two 24-bit parallel words in the deserializer block. A level detection circuit reports when the output is above – 40 dBFS and near or above clipping on the front panel controls and the web pages. The multiplexer acts as a 4 x 4 router.
Service Service The 8921ADT 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) and check fuse if no voltage is detected.
Status Monitoring 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.
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 15.
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.
Status Monitoring 54 8921ADT Instruction Manual
Index Symbols >-40 dBFS/CLIP LEDs 15 Numerics 8900 frame frame alarm 52 module capacity 10 status reporting 51 8900-A-CBL option 7 8900NET module installation 10 8921ADT block diagram 48 features 7 specifications 46 A AES audio outputs balanced jumper settings 8 gain adjustments configuration summary 23 local controls 27 overview 20 remote controls 38 output resolution jumper setting 8 unbalanced 12 jumper settings 8 AES outputs specification 46 analog audio inputs cabling 12 configuration summary 22 sett
Index D J documentation online 28 web site 2 jumpers, on-board 8 E E-MEM description 39 load from file 41 web page 39 enable SNMP 53 environmental 47 F factory defaults overview 21 recall factory defaults configuration summary 24 local control 26 remote controls 41 summary table 22 FAQ database 2 FAULT LED states 15 troubleshooting 51 Frame Controller module 10 Frame Status page 52 frequently asked questions 2 functional description 48 Functional View web page 33 fuse 50 G Gecko frame 10, 47 graphica
Index remote controls 38 output sample rate factory default 21 onboard jumper 8 overview 20 remote controls 38 P power 47 power supply 10 power up 14 PWR LED 15 R rear connectors 11 reference source cabling 13 configuration summary 23 local controls 26 overview 21 remote controls 32 Refresh button 28 REM OVR LED 15 repair depot 50 report enable switches 53 testpoints 50 Tracking input cabling 13 on-board jumper 8 Tracking output cabling 13 on-board jumper 8 TRK ON LED 15 troubleshooting 50 U user settin
Index 58 8921ADT Instruction Manual
