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Gigabit Ethernet – IEEE 802.3z The Choice of a New Generation Design Presentation. ECE 4006c G2- Gigabit Ethernet Intel/Agilent TX Javier Alvarez, gte006r Astou Thiongane, gt3083a Ebrima Kujabi, gte212s. Objectives. General Use MAXIM 3287 Kit Board Specs Basic Features

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gigabit ethernet ieee 802 3z the choice of a new generation design presentation

Gigabit Ethernet – IEEE 802.3zThe Choice of a New GenerationDesign Presentation

ECE 4006c

G2- Gigabit Ethernet Intel/Agilent TX

Javier Alvarez, gte006r

Astou Thiongane, gt3083a

Ebrima Kujabi, gte212s

objectives
Objectives
  • General Use
    • MAXIM 3287 Kit
  • Board Specs
    • Basic Features
    • Component Analysis
    • Safety Features
    • Issues with Laser Mounting
  • Testing Procedures
  • Design Board
general use of maxim board
General Use of MAXIM board
  • Remove transceiver Module from Intel PRO/1000 Board.
  • Replace transmitter with MAXIM 3287
    • Optical Transmitter Module
board specs
Board Specs
  • Basic Features
    • Optimized operation at 1.25 Gbps.
    • Supports a current modulation up to 30mA.
    • Deterministic Jitter of approx. 22 ps.
    • Requires a 3.3 V to 5V power supply.
component analysis
Component Analysis
  • Differential Input & Output
    • Eliminates noise in channel
  • Reference Voltage
    • Used for programming a laser bias current in VCSEL applications (~0.8mA)
  • Monitor Diode
    • Monitors Laser Current
    • Not supported by board
component analysis cont d
Component Analysis (Cont’d)
  • Current Modulation Control (Pin 15)
  • Temperature Coefficient Control (Pin 16)
laser mounting
Laser Mounting
  • VCSEL Mounting
    • Common-Cathode Configuration
  • Avoiding Laser Ringing or Overshooting
    • Reduce Length of Leads
    • Typical Package Leads have inductances of 25nH/in.
safety features
Safety Features
  • Shutdown Driver Output (SHDNDRV)
  • Power-On Reset (POR)
    • Resets Laser when turned off.
    • Rejects Noise caused by VCC during power-on or hot plugging.
  • Bias Controlling Transistor Driver (BIASDRV)
    • Transistor placed between BIASDRV and VCC
    • Ensures Low Noise Operation
    • Rejects Power Supply Noise
  • Decoupling Capacitors at VCC & GND
testing procedures
Testing Procedures
  • The Eye Mask from IEEE 802.3z
    • Distinction between logical 1 and 0
    • Allows to see amount of jitter
  • Bit Error Testing
    • Tektronic BERT
  • Testbed
board design
Board Design
  • Parts List Consists:
    • VCSEL (~850 nm)
    • SMA Connectors
    • SMA Cable
    • Resistors
    • Capacitors
    • Inductors
    • 3 to 5 Volt Power Supply

Picture provided by: http://www.ece.gatech.edu/academic/courses/fall2001/ece4006/1G2/

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