Gigabit Ethernet TxRx

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