1. Gigabit Ethernet Progress Report ECE 4006 Harsh Sopory
Kaushik Narayanan
Nafeez Bin Taher

2. Topics to be discussed Research Goals Overview Design Steps
Where we stand
Eye diagram for 10m and 100m cables
Problems faced so far
Next Step
Expected Problems

3. Research Goals Recap Long Term: Reduce cost of Gigabit Ethernet
Our Goal: Set up test bed for future research
Card and Module to be used :
Intel PRO/1000 Gigabit Server Adapter
Agilent HFBR 53D5 Optical Transceiver
1.Reduce Cost of Gigabit Eth: Large portion of the Gig Eth card cost associated with the opto-electronic module => make cheaper module
2.Our goal for this semester is to set up test bed where future module designers can test the modules

4. Design Steps Construct Evaluation Board Remove Transceiver from card
Place components and Transceiver on Board
Test Board
Connect Board to Gigabit Card
Test setup with another Gigabit Card

5. Where we stand Finished steps 1-4
Tested card with 10m cable and 100m cable
Used PN7 Signal Pattern at 1.4 Gigabit/s
No errors obtained
Used PN23 Signal Pattern at 1.2 Gigabit/s
Error rate of 2.3 Errors per Megabit
PN7 7 0’s in a row and 7 1’s in a row
PN ’s and 23 1’s

6. Eye diagram for 10m Cable
Channel 1 (receiver channel) looks worse than channel 2. Board looks worse on that side.
Tx was connected to the Pattern generator which generated PN 7 sequence
No errors for a minute and a half
Jitter: Jitter is a measure of signal quality and is defined as the measure of variance in signal characteristics. Zero jitter measurements indicates that the signal transition occurs exactly at the same point in time for each transition. Wide superimposed transitions in the eye pattern diagram is the result of high jitter associated with the signals implying that the signals are not consistently transitioning at the required time. Small eye width implies large variance in the signal transition time.

7. Eye diagram for 100m Cable
1. Channel 1 (receiver channel) looks worse than channel 2.
Tx was connected to the Pattern generator which generated PN 7 sequence
No errors for a minute and a half

8. Problems Faced so Far Soldering Top and Bottom of board unconnected
Soldering was a problem coz no prior experience
Board sides connected by using wires and by allowing solder to drip down the power connector leads

9. Next Step Connect Ethernet card to Eval board
Termination networks on card need to be removed
Insert card into computer and run test program on it to ensure it works 1.

10. Setup

11. Expected Problems Soldering Removal of card elements
Signal Detect Circuitry