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Gigabit Ethernet TxRx

This presentation provides a detailed overview of the current and completed tasks in the development of Gigabit Ethernet Tx and Rx test boards. Key completed tasks include fixing and testing the Rx test board, resolving initial power connection issues, and conducting various performance tests, including assessing Bit Error Rates (BER) at different attenuation levels. Upcoming tasks include finalizing PCB designs and ordering. The presentation also discusses collaboration with vendors for VCSELs and photodetectors, and the progress of schematic generation and PCB layout.

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Gigabit Ethernet TxRx

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  1. ECE164.02 Group 2 – Presentation 4 Gigabit Ethernet TxRx Andrew Tupper February 26, 2004

  2. Current & Completed Tasks Fix & Test Rx Test Board Build Tx Test Board Contact Vendors of VCSELs & PDs Tx & Rx Schematic Diagrams Begin PCB Design Revise Gantt Chart Gigabit Ethernet Summary 2/19-2/26 Upcoming Tasks • Complete PCB Design • Order PCB’s • Complete & Test Tx Test Board Group 2 – Presentation 4 February 26, 2004

  3. Gigabit Ethernet Rx Test Board • Initial problem caused by faulty power connection • No recognizable signal Group 2 – Presentation 4 February 26, 2004

  4. Gigabit Ethernet Rx Test Board • Replaced power connectors with correct, on-chip style connectors • Rx test board works! Group 2 – Presentation 4 February 26, 2004

  5. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 0dB attenuation • 1 minute B.E.R. of 2.8E-08 • Receiver is overdriven Group 2 – Presentation 4 February 26, 2004

  6. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 10dB attenuation • 1 minute B.E.R. of 0.0E-9 Group 2 – Presentation 4 February 26, 2004

  7. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 20dB attenuation • 1 minute B.E.R. of 0.0E-9 Group 2 – Presentation 4 February 26, 2004

  8. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 30dB attenuation • 1 minute B.E.R. of 0.0E-9 Group 2 – Presentation 4 February 26, 2004

  9. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 40dB attenuation • 1 minute B.E.R. of 0.0E-9 Group 2 – Presentation 4 February 26, 2004

  10. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 50dB attenuation • 1 minute B.E.R. of 2.2E-1 • Signal Loss • B.E.R. becomes unacceptable at 42dB attenuation Group 2 – Presentation 4 February 26, 2004

  11. Gigabit Ethernet Tx Test Board • Completely assembled Tx test board, excluding SMA outputs… Group 2 – Presentation 4 February 26, 2004

  12. Gigabit Ethernet Tx Test Board • Tx outputs are shorted to ground! • Waiting on engraver to complete assembly Group 2 – Presentation 4 February 26, 2004

  13. Gigabit Ethernet PDs & VCSELs • Secured sample HFE438x-522 VCSEL from Honeywell • Difficulty contacting Luxnet in search of VG1A 9001 VCSEL • In contact with OSI and Hamamatsu for PDs: may have to collaborate with group 1 to meet minimum order requiremetns Group 2 – Presentation 4 February 26, 2004

  14. Gigabit Ethernet Rx Schematic • Generated Rx schematic in ExpressSCH Group 2 – Presentation 4 February 26, 2004

  15. Gigabit Ethernet Tx Schematic • Generated Tx schematic in ExpressSCH Group 2 – Presentation 4 February 26, 2004

  16. Gigabit Ethernet PCB Layout • Began board layout with ExpressPCB • Waiting on final approval of schematics before moving ahead with PCB layout Group 2 – Presentation 4 February 26, 2004

  17. Gigabit Ethernet PCB Layout

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