enhancing and implementing an improved gigabit ethernet card group 3: ashley lee shaun rosemond
DESCRIPTION
Enhancing and Implementing an Improved Gigabit Ethernet Card Group 3: Ashley Lee Shaun Rosemond 10/30/2001. Design Issues. Use existing design as foundation and modify Opto-module that functions correctly in differential mode - PowerPoint PPT PresentationTRANSCRIPT
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Enhancing and Implementing anEnhancing and Implementing anImproved Gigabit Ethernet CardImproved Gigabit Ethernet Card
Group 3:Ashley Lee
Shaun Rosemond
10/30/2001
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Design IssuesDesign Issues
• Use existing design as foundation and modify • Opto-module that functions correctly in
differential mode• Proper functionality of module after interfacing it
with Intel Network Card• Maintain a low, inexpensive cost
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Old versus New Design ModificationsOld versus New Design Modifications
•BNC versus SMA•Durability•Smaller•Higher Bandwidth•Testing Purposes
•Single-Ended versus Differential•Noise Reduction•Low Error Rates
•Cable
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How Does Differential Mode Work?How Does Differential Mode Work?
Each signal generated attenuated by some noise value has an inverted signal generated attenuated by the same noise value; subtraction results in a more “square-like” signal at twice the original amplitude with the impact due to noise effectively minimized.
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Parts for building/testingParts for building/testing Gigabit Network CardGigabit Network Card
•Gigabit Ethernet Card (2 with one being fiber)•Agilent HFBR-53D5 Optomodule•Gigabit Interface Card•SMA Connectors•Resistors (68 Ω, 191 Ω, 267 Ω)•Capacitors (.01 μF)•Coaxial Cable (50 Ω Impedance and frequency of 3.0 GHz)•Optical Cable (SC/SC Connectors at various lengths)•Power Supplies (5V DC)
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Schematic of Agilent HFBR-53D5 OptomoduleSchematic of Agilent HFBR-53D5 Optomodule
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Design Implementation of GBIC Module Design Implementation of GBIC Module
•50 Ohm Terminated Transmission Lines•Coupling Capacitors•Function of Resistors
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Part Color
.01 μF Yellow267 Ω Blue191 Ω Red68 Ω Green
GBIC Module Board LayoutGBIC Module Board Layout
Optomodule Pins: 9 8 7 6 5 4 3 2 1
Receive
Transmit
Vcc2
Vcc1
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Finished GBIC ModuleFinished GBIC Module
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Interfacing with Intel Pro/1000F BoardInterfacing with Intel Pro/1000F Board
Blue Signal DetectYellow ResistorsRed Capacitors
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Potential Implementation IssuesPotential Implementation Issues
•Soldering Problems•Interfacing with Intel Board
•Exposed Coaxial Cable – Transmission Line?•Signal Detect•Removal of Resistors and Capacitors
•Inoperative Components
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Any Questions?Any Questions?