Anritsu MP1763C Manual do Utilizador descarregar pdf (Página 64)

5-2

Section 5 PRINCIPLES OF OPERATION

Fig. 5.1-1 Mark Ratio 1/4, 1/8 Pattern Generator

Fig. 5.1-2 Example of Pseudorandom Pattern

1 2 3 4 5 6

1/2

Mark ratio

1/4 (1 bit shift)

1/8 (1 bit shift)

1/4 (3 bits shift)

1/8 (3 bits shift)

Shift re

g

iste

r

PRBS pattern

g

enerator

(See Table 5.1-1)

DATA1

DATA2

DATA3

DATA4

DATA5

DATA6

DATA7

DATA8

(2 /8)-1 bit

N

2 - 1 BIT

N

For exam

p

le, when PRBS 2 -1, 2 /8=4096 bits.

15

15

2 /8 bits

N

leading

2 /8 bits

N

leading

2 /8 bits

N

leading

2 /8 bits

N

leading

2 /8 bits

N

leading

2 /8 bits

N

leading

2 /8 bits

N

leading

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 77 78

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