5 pseudo random pattern setting – Anritsu MP1763C User Manual
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Section 4 OPERATING INSTRUCTIONS
4.2.5 Pseudo random pattern setting
Select PRBS with the keys.
Set the number of PRBS steps with the keys.
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
N
- 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.