Related Manuals for GRASS VALLEY 8914
Summary of Contents for GRASS VALLEY 8914
- Page 1 Instruction Manual 0 7 1 - 0 5 4 7 - 0 1 F I R S T P R I N T IN G : J A N U A RY 1 9 9 9 R E V I S ED PR I NT I N G : A P R I L 1 9 9 9 8 9 1 4 D U A L A E S / E B U D E L A Y D I S T R I B U T I O N A M P L I F I E R...
- Page 2 Grass Valley Group. Grass Valley Group assumes no re- sponsibility or liability for any errors or inaccuracies that may appear in this publication.
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Page 3: Table Of Contents
About This Manual ........... . . 8914 Dual AES/EBU Delay Distribution Amplifier Introduction . - Page 4 Contents 8914 Instruction Manual...
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Page 5: About This Manual
This manual describes the features of a specific module of the 8900 Series Distribution Amplifier family. As part of this module family, it is subject to Safety and Regulatory Compliance described in the 8900 Series frame and power supply documentation (see the 8900 Series User’s Guide ). 8914 Instruction Manual... - Page 6 Preface 8914 Instruction Manual...
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Page 7: 8914 Dual Aes/Ebu Delay Distribution Amplifier
This is due to the relatively large processing times associated with DVEs and switchers. The 8914 provides a low cost and easy-to-use solution to the lip sync errors associated with these large delays. Minimizing space require- ments, the 8914 provides two fully controllable delay paths on a single board, allowing up to 20 delays (ten modules) in a two rack unit frame. -
Page 8: Module Installation
8914 Dual AES/EBU Delay Distribution Amplifier Module Installation There are ten cell locations in the frame to accommodate either analog or digital modules. These are the left ten slots. Refer to Figure The two cells on the right are allocated for the power supplies. For addi- tional information concerning the Power Supply module, refer to the Power Supply manual. -
Page 9: Cabling
BNCs to identify the specific 8914 connector functions. Inputs The 8914 Dual AES/EBU Delay DA has two channels. Delay 1 is a 1x4 DA with a looping input. Delay 2 is a 1x3 DA with a terminated input. Trans- former coupling on the inputs eliminates common mode noise. -
Page 10: Outputs
75 Ω . Adjustments, Testpoints, and Indicators The 8914 DA has ground and +5V testpoints easily accessible on the front edge of the module (see Figure Between the testpoints is a green Power On LED. -
Page 11: Delay Adjustments
For example, setting Coarse to 0 and Fine to 1 produces 2 ms of delay. Each additional Fine switch increment adds 2 ms. Setting Coarse to 1 and Fine to 0 produces 32 ms of delay. Each additional Coarse switch increment adds 32 ms. 8914 Instruction Manual... -
Page 12: Specifications
8914 Dual AES/EBU Delay Distribution Amplifier Specifications Table 2. 8914 Specifications Parameter Value Inputs Number Two (1 loopthrough, 1 terminated) Signal type AES/EBU digital audio, per AES3id:1995 and SMPTE 276M Connector 75 Ω BNC Return loss > 25 dB, 0.1 to 6 MHz Frame Rates 32, 44.1, or 48 KHz (Automatic selection) -
Page 13: Service
Service Service The 8914 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. If your module is not operating correctly, proceed as follows: Check frame and module power and signal present LED. -
Page 14: Functional Description
Delay 2 Lock Ch. 1 Fine Lock Ch. 2 Figure 5. 8914 Dual AES/EBU Delay DA Block Diagram Receive Circuit This circuit features a digital audio transformer conforming to EBU stan- dards. The AES/EBU receiver recovers audio data and low jitter clocks from the digital audio input transmission line. -
Page 15: Fifo Circuits
Error pins from the AES/EBU receiver. A no lock error condition (Lock LED off) indicates that the phase-lock loop in the receiver is not locked to the incoming data stream or the input signal is not present. 8914 Instruction Manual... - Page 16 8914 Dual AES/EBU Delay Distribution Amplifier 8914 Instruction Manual...
- Page 17 1, 4, environmental specifications performance phase lock power requirements power supply frame 2, 3, repair depot ground rotary switch impedance specifications indicator switch input delay loopthrough rotary 8914 Instruction Manual Index-1...
- Page 18 Index-2 8914 Instruction Manual...