BHI NEDSP900, Руководство пользователя

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NEDSP900 Development Board
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Contents
1.0 Introduction
1.1 Recommendation
1.2 Board Mechanics
1.3 General Specifications
2.0 The inputs
2.1 SK6 Speaker/Headphone/Line Signals
2.2 SK7 Microphone Input Signals
2.2.2 Electret Bias
2.3 Balanced Input Pre=amplifiers
2.4 Signal Input Selection
2.5 Overload Indicators
3.0 Gain Settings
3.1 Setting the gain for SK7 (Microphone input)
4.0 Noise Reduction Settings
5.0 Outputs
5.1 Line Drive
5.2 Headphone/Speaker Output
6.0 Other Facilities on the Board
6.1 Audio Monitor Points
6.2 Noise Reduction Control
6.3 Algorithm ‘Hold’ (SF)
7.0 Connector Specifications
Appendix A – PCB Schematic Diagrams, Component Positions and BOM
Appendix B – Balanced Input Amplifiers
Appendix C – Fitting the board to an enclosure