Gigabit Ethernet PMD ECE 135 Group 2 Presentation

Gigabit Ethernet PMD ECE 135 Group 2 – Presentation 1 Vinh Nguyen January 9, 2005

Gigabit Ethernet: Progress Summary Completed Tasks l l Completed initial Gantt chart Made initial assignment of group responsibilities Reviewed IEEE 802. 3 z Standard regarding the PMD module Started researching VCSELs Next Week’s Tasks l l l Select VCSELs and PDs Optical link budget Test eval board Revise Gantt chart Order parts?

Group Responsibilities l l Andrew Meyerson – Administration, ordering, soldering Clifton Kerr – Layout, design, testing Vinh Nguyen – Webpage, report writing Bryan Justice – Optical link budget, design, testing, report writing

Gantt Chart

IEEE 802. 3 z PMD Initial Research l l We will be building a Physical Medium Dependent (PMD) sublayer board PMD should conform to the IEEE 802. 3 z specifications for type 1000 BASE-SX (Short Wavelength Laser)

802. 3 z Standard l PMD block diagram as found in the 802. 3 z standard

802. 3 z Cont. l Transmit characteristics (from 802. 3 z standard)

802. 3 z Cont. l Receive characteristics (from 802. 3 z Standard)

802. 3 z Cont. l l The standard also defines a worst case link power budget and penalties This will probably be needed for determining the optical link budget

802. 3 z Cont. l l The standard also specifies how to test the PMD to ensure compliance For example, the extinction ratio must be measured with a repeating K 28. 7 data pattern The standard also specifies test values corresponding to the minimum level of compliance For example, maximum high frequency optical jitter is specified

VCSEL Research l l Started looking at VCSELs Performed 4 Corner Analysis of: – – l Advanced Digital Optics Roithner Lasertechnik Briefly examined:

Four Corners Analysis for Roithner Lasertechnik TTR-D 1

Four Corners Analysis for Advanced Digital Optics HFE 438 x-521

Other VCSEL Vendors l Lasermate – l Link to datasheet for VCSEL with SC connector is dead Optek – Does not appear to have VCSEL model with SC connectors

Summary of VCSELs l l The Roithner Lasertechnik TTR-D 1 appears to be the best VCSEL so far in performance terms Potential problems – – Delivery time Currency costs

Next Week l Research and select parts – – – l l Look at more VCSELs Look at PDs Call vendors for more information Determine optical link budget Test evaluation board Revise Gantt chart as necessary Order parts?

References l l l IEEE Computer Society (2003). IEEE 802. 3 Standard. New York: The Institute of Electrical and Electronics Engineers, Inc. Retrieved Thursday, January 20, 2005, from ECE 164. 02 website: http: //www. ee. duke. edu/~mbrooke/EE 164. 02/Spring_2004/group_2/index_files/8023. pdf ECE 164 Group 1 Presentations. (April 26, 2004). ECE 164 Group 1 Website. Retrieved January 20, 2005 from http: //www. ee. duke. edu/~mbrooke/EE 164. 02/Spring_2004/group_1/downloads. html ECE 164 Group 2 Presentations. (April 17, 2004). ECE 164 Group 2 Website. Retrieved January 20, 2005 from http: //www. ee. duke. edu/~mbrooke/EE 164. 02/Spring_2004/group_2/presentations. html