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Enhancing and Implementing an Improved Gigabit Ethernet Card Group 3: Ashley Lee Shaun Rosemond

Enhancing and Implementing an Improved Gigabit Ethernet Card Group 3: Ashley Lee Shaun Rosemond 10/30/2001. Design Issues. Use existing design as foundation and modify Opto-module that functions correctly in differential mode

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Enhancing and Implementing an Improved Gigabit Ethernet Card Group 3: Ashley Lee Shaun Rosemond

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  1. Enhancing and Implementing an Improved Gigabit Ethernet Card Group 3: Ashley Lee Shaun Rosemond 10/30/2001

  2. Design Issues • Use existing design as foundation and modify • Opto-module that functions correctly in differential mode • Proper functionality of module after interfacing it with Intel Network Card • Maintain a low, inexpensive cost

  3. Old versus New Design Modifications • BNC versus SMA • Durability • Smaller • Higher Bandwidth • Testing Purposes • Single-Ended versus Differential • Noise Reduction • Low Error Rates • Cable

  4. How Does Differential Mode Work? Each signal generated attenuated by some noise value has an inverted signal generated attenuated by the same noise value; subtraction results in a more “square-like” signal at twice the original amplitude with the impact due to noise effectively minimized.

  5. Parts for building/testing • Gigabit Network Card • Gigabit Ethernet Card (2 with one being fiber) • Agilent HFBR-53D5 Optomodule • Gigabit Interface Card • SMA Connectors • Resistors (68 Ω, 191 Ω, 267 Ω) • Capacitors (.01 μF) • Coaxial Cable (50 Ω Impedance and frequency of 3.0 GHz) • Optical Cable (SC/SC Connectors at various lengths) • Power Supplies (5V DC)

  6. Schematic of Agilent HFBR-53D5 Optomodule

  7. Design Implementation of GBIC Module • 50 Ohm Terminated • Transmission Lines • Coupling Capacitors • Function of Resistors

  8. GBIC Module Board Layout Receive Optomodule Pins: 9 8 7 6 5 4 3 2 1 Vcc1 Vcc2 Transmit

  9. Finished GBIC Module

  10. Interfacing with Intel Pro/1000F Board

  11. Potential Implementation Issues • Soldering Problems • Interfacing with Intel Board • Exposed Coaxial Cable – Transmission Line? • Signal Detect • Removal of Resistors and Capacitors • Inoperative Components

  12. Any Questions?

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