Agilent Technologies Option H48 Multiport Test Set Z5623A Especificações Página 66

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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
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