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Similar to Physical Layer - Metal vs Fiber (20)
Physical Layer - Metal vs Fiber
- 13. c = 3.0 × 10 8 [m/s]
RTT
€
0.5 1.5
⋅
⋅ 1[sec]
7.5 1.0
= 200[ms]
RTT = 2⋅
€
…
1.5
[wired.jp]
2014 (c) INTERNET MULTIFEED CO.
- 14. Ethernet
100Mbps 100BASE-TX (2Lane)
100BASE-FX
1Gbps 1000BASE-T (4Lane)
1000BASE-X
10Gbps 10GBASE-T (4Lane)
10GBASE-R
40Gbps -
40GBASE-SR10 (10Lane)
100Gps -
100GBASE-LR4 (4Lane)
2014 (c) INTERNET MULTIFEED CO.
- 16.
…
1m
θ=
θ =0
π
8
2 ⋅ λ = 1 λ = 1 ⋅ c = 1 ⋅ 3 × 10
1=
2π €
4
4 f 4
f
€
6
f = 7.5 × 10 = 7.5[MHz]
π
2
f
θ=
π
2
€
θ =0
θ =π
€
1m
€
€
2014 (c) INTERNET MULTIFEED CO.
€
- 21. ref.15
(IL, Insertion Loss)
(RL, Return Loss)
NEXT, Near End Crosstalk
FEXT, Far End Crosstalk
(ANEXT, Alian NEXT)
(AFEXT, Alian FEXT)
(BN, Background Noise)
2014 (c) INTERNET MULTIFEED CO.
ref.16