Specifications

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Page 101
安捷倫科技高頻元件量測研討會
Feb.23, 2006
Eye Diagrams: 26 inch Channel
1 Gbps, 200 psec/div 2.5 Gbps, 80 psec/div
5 Gbps, 40 psec/div 7.5 Gbps, 27 psec/div
Page 102
安捷倫科技高頻元件量測研討會
Feb.23, 2006
Non-ideal Differential Signaling: Mode Conversion
Anything that affects one line and not the other will convert differential
signal into common signal
Drive is asymmetrical between channels
• skew
• output impedance and launched voltage
Signal environment in interconnect is asymmetrical
• different characteristic impedance in each leg
• length is different
• loading from connectors, jags, pads, ground planes
Real problem of common signal is EMI from unshielded twisted pair