2ch/4ch Synchronization Pre-code Signal Generation
The Pre-code function automatically generates 100G DP-QPSK and
40G DQPSK modulation signals for evaluating optical modulators.
Hardware-based generation of modulation signals produces pure
PRBS31 signals without pattern length restrictions, resulting in
high-reliability evaluations using high-load pseudo-random patterns
closely approximating real signals.
Versatile Pattern Generation
- Pseudorandom Patterns (PRBS)
All PRBS patterns required by standards are supported up to PRBS
231 − 1.
2n − 1 (n = 7, 9, 10, 11, 15, 20, 23, 31)
Zero Substitution Pattern
Consecutive 0 s and 1 s patterns can be added to PRBS patterns
for CDR tolerance tests.
2n, 2n − 1 (n = 7, 9, 10, 11, 15, 20, 23)
Patterns required by each application, such as CJTPAT, CJPAT
and K28.5 can be created flexibly.
256 Mbits/ch max. (Steps: 1 bit)
- Mixed Pattern
A mixed data and PRBS pattern can be output. At creation of
SONET/SDH frames, adding a PRBS231 − 1, etc., pattern to the
payload supports setting of a continuous pattern across frames.
The DQPSK and DP-QPSK pre-code signal generation are
supported. Hardware-based generation of modulation signals
produces pure PRBS31 signals without pattern length restrictions.
Application evaluation using burst signals, such as optical loop test
and transmission test using quantum noise technology are