Anritsu MP1763C Manual de usuario descargar pdf (Pagina 42)

4-8

Section 4 OPERATING INSTRUCTIONS

4.2.5 Pseudo random pattern setting

① Select PRBS with the keys.

② Set the number of PRBS steps with the keys.

③ Set the PRBS mark ratio with the keys.

When LOGIC is positive, select the mark ratio from the

top row (0/8, 1/8, 1/4, 1/2).

When LOGIC is negative, select the mark ratio from the

bottom row (8/8, 7/8, 3/4, 1/2).

If change the logic positive to negative when mark ratio is 1/4,

the mark ratio become 3/4.

Patterns generated as explained in Section 5.1 “ Pseudo random patern”. When an optional continuous N-bit pattern is

selected in a PRBS pattern having a 2

- 1 cycle, all bit paterns in the same cycle we unique. That is, all other bit arrays

except all-1s are provided.

Note: When setting pseudo random pattern, the BIT LEDs light according to the set pattern.

PATTERN

LOGIC PATTERN

PRBS / ZERO SUBST PRBS MARK RATIO

2 - 1

POS

NEG

ALTNDATA Z.S PRBS 7 9 11 15 20 23 31 0/8 1/8 1/4 1/2

8/8 7/8 3/4 1/2

①

PATTERN

LOGIC PATTERN

PRBS / ZERO SUBST PRBS MARK RATIO

2 - 1

POS

NEG

ALTNDATA Z.S PRBS 7 9 11 15 20 23 31 0/8 1/8 1/4 1/2

8/8 7/8 3/4 1/2

②

③

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Anritsu MP1763C Manual de usuario Pagina 42