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ECE164.02 Group 2 – Presentation 4. Gigabit Ethernet TxRx. Andrew Tupper. February 26, 2004. 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. - PowerPoint PPT Presentation
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Gigabit Ethernet TxRx
ECE164.02 Group 2 – Presentation 4
Andrew Tupper February 26, 2004
Group 2 – Presentation 4
February 26, 2004
Gigabit Ethernet Summary 2/19-2/26
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
Upcoming Tasks Complete PCB Design Order PCB’s Complete & Test Tx Test
Board
Initial problem caused by faulty power connection
Group 2 – Presentation 4
February 26, 2004
Rx Test BoardGigabit Ethernet
No recognizable signal
Replaced power connectors with correct, on-chip style connectors
Group 2 – Presentation 4
February 26, 2004
Rx Test Board
Rx test board works!
Gigabit Ethernet
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
Rx Test Board Gigabit Ethernet
Scope set to 2 second persistence
10dB attenuation 1 minute B.E.R. of 0.0E-9
Group 2 – Presentation 4
February 26, 2004
Rx Test Board Gigabit Ethernet
Scope set to 2 second persistence
20dB attenuation 1 minute B.E.R. of 0.0E-9
Group 2 – Presentation 4
February 26, 2004
Rx Test Board Gigabit Ethernet
Scope set to 2 second persistence
30dB attenuation 1 minute B.E.R. of 0.0E-9
Group 2 – Presentation 4
February 26, 2004
Rx Test Board Gigabit Ethernet
Scope set to 2 second persistence
40dB attenuation 1 minute B.E.R. of 0.0E-9
Group 2 – Presentation 4
February 26, 2004
Rx Test Board Gigabit Ethernet
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
Rx Test Board Gigabit Ethernet
Completely assembled Tx test board, excluding SMA outputs…
Group 2 – Presentation 4
February 26, 2004
Tx Test Board Gigabit Ethernet
Tx outputs are shorted to ground!
Waiting on engraver to complete assembly
Group 2 – Presentation 4
February 26, 2004
Tx Test Board Gigabit Ethernet
Gigabit Ethernet
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
PDs & VCSELs
Group 2 – Presentation 4
February 26, 2004
Rx SchematicGigabit Ethernet
Generated Rx schematic in ExpressSCH
Group 2 – Presentation 4
February 26, 2004
Tx SchematicGigabit Ethernet
Generated Tx schematic in ExpressSCH
Group 2 – Presentation 4
February 26, 2004
PCB LayoutGigabit Ethernet
Began board layout with ExpressPCB
Waiting on final approval of schematics before moving ahead with PCB layout
PCB LayoutGigabit Ethernet
