Chapter 1

1
Chapter 1  ?????? ??  1-1 ????  1-2 ????  1-3
????  1-4 ???????  1-5 ???????
2
?? ????????????????????????????????????,?????
???????????????,??????????????????,???????????????
???????????????
3
?1-1?????????,???????????????????????????????,
????????????,??????????(???)?????,???????????,????
???????????????????????
4
????????????????,???????????????????????T
???????,?????????????????????,???????1-2??????
??
5
???????????????????,??????????,?1-3???????????
???
6
????????,?????(Frequency)????,???????,?????(He
rtz),??????(T)???,??1-4,?????????(Filters)????????

7
??????????1-5,???????????????????????????????????,
???????????????,?????????,????????????????????????
,???????(Aggregate bandwidth)???????,????????(bps)
??????,?????
8
??(Modulation)????????????????????????????????
???????????????,???????????(AM)?????(FM)?????(PM)
???,??????,??????(ASK)?????(FSK)?????(PSK)???????
?1-6???????????  
9
(No Transcript)
10
??????(pulse code modulation(PCM)),???????????????
?,??1-7???????/?????(ADC),????????????,??????????0
?1????,???????????(0)????(1)????????????,?????(Nyq
uist)??,????????????????
11
??????????????????,??????????(ASK)?????????(OO
K)?????????????????,?????1?0?????,??????????(Retu
rn to zeroRZ)?????(Non return to zeroNRZ),??1-8
12
??(multiplexing)???????????????,?????????,????
??????,??????????????????????????(FDM)?????(TDM)??
???(FDM),?????????? ?1-1????T????????????,???T
-1????????(??1-9),?????8??,?24????1?,???1????????,
??193??,??8KHz???1.544Mbps?
13
(No Transcript)
14
????(Data Network)??????????,?????????????????
???????????,??????????????????????????????????????
????????????????????1-10?????????????
15
????????????(OSI Seven Layer)????????????,??1-11,?
??????????????????????????????????????????????????
???,?????????,????????,????????????
16
????(IP)???????,???????????????,??????????????????
???,????????????TCP/IP?OSI seven layer?????1-12?
17
?????????????????????? ??????(Heron)?????????????
?? ?????????
18
1880????????(Alexander Graham Bell)????1-14??????
????
19
????,?????????????????? ???????????????????
????,??1954???????????????????????????????????????
????????????????????????????????(??1-15),??1960???
????????????1dB/m?
20
??(Charles K. Kao)(??1-16)???????(George)?????
???????,????????????? ??????????????,??????????,?
????????(????20 dB/km),?????????????
21
???????????????????,????????????????1970????????(C
orning)?????(Donald)????(Robert)???(Peter),???????
????20dB/km?????(??1-17)???????????????????800nm??
??????,?????45Mbps?
22
1975???????????????????????1986??????????????,
??1300nm??????????1983???????????(??????)???1988??
???????????1990??,????????????????????????
? 1990????,???????????????,??1550
nm????????????????????????,?????????????????,?????
????7500??,???????,??2.56??????????
23
??????????????,????????????,?1-18?????????????????
?????????
?????????????????,?????????????????500?? ????????
????,????????????,?????????????