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2.28 |
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$7 |
2C.2.29 BA7 7 C1 78, |
B632 7FC |
D2C |
172 B CAC: |
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7AC BE27 B, C1 78 y2 (t) |
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ABDB2B 5 5 27 EB89 3, 7 7 8CD 67 – |
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172 B CAC, 7 C D32578 |
2 , 5 ABDB2B 743 C C1 787 y2 (t) ≥ 50 , EB89 3, |
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43 C D32578 |
1 . |
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150 |
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100 |
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50 |
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-50 |
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2 |
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y2 (t ) |
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-100 |
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-150 |
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2.29 |
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5, 7AB 3, 7 2C.2.30 BA7 7 C1 78, B632 7FC 4 172 B CAC: |
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y |
3 |
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2 |
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3 |
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C f3 = 7 f0 . |
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17 DBD7 43D5 2DB 172 B CAC 5 7 27 EB89 3, 7 7 8CD 67 – 5 7 27 |
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3 9 3, 43 B B5 B 172 B CAC. 5 D32578 |
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3 , 5 ABDB2B 743 C |
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C1 787 y3 (t) ≥ 50 , EB89 3 C D325787 |
2 . |
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106 |
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123456 2. 78549AB2 A565CDEEF C2 |
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100 |
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y3 (t) |
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2.30 |
!836 3D B CD9, 4DB 3AD2 C1 787 3 3D 5 75C C B DC BD 32367573 67. $7 2C 32, 3236747 68C B B 836B57D389 B DC 83 C8C 36C C 65C173D 3AD2 C1 787 BD3 C789 B1B AB67 5 DB2B C AC 47 DBD C 2C5B6CD A B 583 C 5 C1 783 D7A 7 573 B 5 5C885 5 A 3C#"2. % 236389 B 8 473, AB167 32367573 3 67 3 B DB D DB89AB C 36C C (C8C DB89AB C 83), 47 DBD7 32367573 B1B C1 787 E 63D 275 7 8. "2C 3236743 43236 FC 36C C C 83 B DB 7 B D758 F7 BD D D5 3D. "B&DB 3AD2 23 89DC2 F31B C1 787 BD3 C789 B1B AB67 2C 3236743 2BC 5B89 67 7 C 73D B8B BD 3ABDB2B 538C4C, E8C AB A 0 7, 6B, 5 236383, E3 AB 34 B DC. +6 7AB 7 27ADCA3 532 C 23638 3AD27 BE 4 B B127 C4C573D 743 C C 3 f0, 5 f0 C8C 7f0. 772 B CA7 C47 DBD7 C 5 3 7f0 B B 23 3E2349 C-7 C 78B1B 5A8767 5 23 89DC2 FC C1 78 – 7 8CD 67 &DC 172 B CA B D758 3D 11% C 3 33 BD 7 8CD 6 B B5 B 172 B CAC.
23EB57 C3 BD D D5C B DB B B D758 F3, DB 3 D9 78C4C B DB B1B DBA7 3 6 32367D4CAB C 2C3 CAB, 5 7 B D7A 3 2C 3 3 C3 D27 B2 7DB2 3 178957 C43 AB 27 5 AC, ABDB2 3 3 2B A7 D B DB DBA. $3BE B6C B D9 178957 C43 AB 27 5 AC 5 &83AD2C43 AC 8C C 5 C BE 8B583 7 D23EB57 C3 7FCD AB 9 D32B5 3DC BD 3 2365C63 CD 7 C. % 47 D B DC, AB2BDAB3 7 A7 C3 5 B6 B C AB 9 D32B5 3DC 3 6B8 B 2C5B6CD9 A 5 B6 C D2B 5 3 B D789 AB 9 D32B5, BE936C 36C B &83AD2C43 AB 236B 323674C 67.
'7 BD23 3 B BE3 B DC 323674C C 2B5 C1 78B5 B 5B8 D 6387D9 836 FC 5 5B6.
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107
123456 2. 78549AB2 A565CDEEF C2
2.3.3.2. F7 5 26C E 8745 28 C F5 5 5 E5 CF5 26C
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% 5 C &DC, A 3DB67 C 2B5B1B AB6C2B57 C 2369 58 D 836 FC3 &5$2 # (2C.2.31):
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23EB57 C A 3DB67 C 2B5B1B AB6C2B57 C
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3C C C 7 C 3AD27 |
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B D758 F3 |
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2.31 |
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32" # 5 &2 &53!6* &!./5 262 B 5B8 3D 2C B6 B C DB 3 B8B 3 2B A7 C A7 787 5 C 3236757D9 ED89 C BE93 67 7 36C C 523 3 C, 7 2C 32, 7 4 D 47 DBD B1B 89DC 83A C2B57 C C B217 C 7 CC 3 AB89AC 8B1C43 AC A7 78B5 5 B6 B C DB 3 8C CC 5 C, 4DB BE3 34C573D EB833 5 BA AB2B D9 323674C 67.
,2B 3 DB1B, 47 DB A 3AD2 C1 787 2369 58 3D D23EB57 C3 BD D D5C B DB B B D758 F3, DB 3 D9 78C4C B DB B1B DBA7 3 6 32367D4CAB C 2C3 CAB, B AB89A 2C 3 3 C3 27 8C4 D27 B2 7DB2 3 26 B2 59CD 823B 3C 5 &83AD2C43 AC 8C C 5 C 23 D D5 3D 2B B 63 C B DB B1B DBA7.
! 3AD2 23 89DC2 F31B C1 787 75C CD BD:
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•B D757 32367573 67.
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108
123456 2. 78549AB2 A565CDEEF C2
68 C 2B C 7 CC 2C3 CA7 32367D4CAB 5 &DC 3DB67 B 3D
8 CD9 8 EB 23 AC 323 76 C1 787 – D7A 7 573 E58.
F ! 5 # , 2 6#./5, 3BE B6C B 68 B6632 AC C 2B C 7 CC 2C CA7 32367D4CAB, 7 D7A 3 68 DB1B, 4DBE C 47 DBD7 AB6C2B57 B1B C1 787 A7A B B EB89 3 BD8C4787 9 BD 8, 4DB, BBD53D D53 B, 3 9 73D 3AD2 C1 787 C 3 23 D D5 3D 2B B 63 C B DB B1B DBA7 2C 78C4CC D27 B2 7DB2 3
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B 3 ) * $2&!)5 # 0$ C C C 27583 C – 387D389 B3, B 3 BE 7D389 B3 D23EB57 C3, 2369 58 3 B3 A 3DB67 AB6C2B57 C. +E 72 3 C3 B CEAC 7 C C43 AB 2B5 3 &AB B CD 523, D7A A7A 2C CA BDE27 573D B CEB4 A762, 3 B C67 B8 B1B
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3 2# * &526 32" 3DB67 AB6C2B57 C 5 7 7 AB8C43 D5B 2B5 3 C1 787 – 43 EB89 3 2B5 3 C1 787, D3 5 3 DBC B D9 2378C 7 CC. )DB BE 8B583 B 3BE B6C B D9 2C 3 3 C EB833 BF B1B C, 836B57D389 B, EB833 6B2B1B1B 2C B-32367 F31B BEB2 6B57 C.
23EB57 C, 2369 58 3 3 A 3DB67 AB6C2B57 C, 58 D 5 7C B 2BDC5B234C5 C, B&DB A7 6 C 27 7D2C573 C 3 3DB6B5 C 2B5B1B AB6C2B57 C B 275 3 C 62 1C C BE87673D 5BC C 6B DBC D57 C C 36B D7DA7 C.
2.3.3.3. 5476 C2AB6 E5 7! 5! F242 E 69A" (NRZ)
$7 2C.2.32,7 BA7 7 3DB6 BD3 C789 B1B AB6C2B57 C, 7 573 D7A 3 AB6C2B57 C3 53 BD3B82A2 C F6$ – NRZ (Non Return to Zero). % &DB 3DB63 5 BAC BD3 C78 BBD53D D5 3D 743 C ECD7
«1», 7 C AC – 743 C «0».
9 2:
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•3 BE87673D 5B D5B 7 B C 2B C 7 CC: 2C 3236743 68C B B 836B57D389 B DC 36C C C8C 83 C1 78 3 C 3 3D C 5B B 7 27 C 2B C 7 C 47 B5 2C CA7 C 32367D4CA7;
•78C4C3 C AB47 DBD B B D758 F3 3 B 5B8 3D C B89 B57D9 &DBD 5C6 AB6C2B57 C 5 A7 787 5 C, 3 BE3 34C57 FC 2 B1B 178957 C43 AB1B B36C 3 C 3 6 2C3 CAB C C DB4 CAB.
"B &DC 2C4C 7 5 AB 9 D32 3D AB6 NRZ 5 4C DB 5C63 3 C B89 3D. 3 3 3 33, C B89 D 31B B6C CA7 CC, 5 ABDB2 D27 D B DB B D758 F C BD D D5C3 7 B C 2B C 7 CC.
109
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123456 2. 78549AB2 A565CDEEF C2 |
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5) |
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6) |
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3) |
,B6 D2 2B5 35B 323674C MLT-3 |
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11 |
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2.32 |
2.3.3.4. #CD5A F6 |
C8D9AB36 |
E5 (RZ) |
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,2B 3 BD3 C789 AB6B5 5 AB 9 D32 3D C B89 D |
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C 89 3 AB6, 5 ABDB2 67 3 236 D7583 B8 C 89 B |
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2B DB. |
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(Return to Zero, RZ), 5 ABDB2B 36C C 7 236 D7583 7 C 89 B B6 B |
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B8 2 B DC, 7 B89 – |
C 89 B 62 1B B8 2 B DC (2C.2.32,E). ,7 6 |
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C 89 68CD B8B5C D7AD7 (ECDB5B1B C D325787). % 3236C 3 A7 6B1B |
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ECDB5B1B C D325787 2BC B6CD 5B 527D A 835B BD3 C78. |
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110