Filter
Top Products
S/UNI-QUAD
PMC-Sierra, Inc.
PM5349 S/UNI-QUAD
DATASHEET
PMC-971239 ISSUE 6 SATURN USER NETWORK INTERFACE (155-QUAD)
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
33
Figure 2: Typical STS-3c (STM-1) Jitter Tolerance
Jitter Freq. (Hz)
0.1
1
10
100
100 1000 10000 100000 1000000 10000000
GR-253-CORE
Note that for frequencies below 300 Hz, the jitter tolerance is greater than 15
UIpp; 15 UIpp is the maximum jitter tolerance of the test equipment. Also note
that the dip in the tolerance curve between 300 Hz and 10 kHz is due to the
S/UNI-QUAD's internal clock difference detector: if the recovered clock drifts
beyond 488 ppm of the reference, the PLL locks to the reference clock.
10.1.2
Serial to Parallel Converter
The Serial to Parallel Converter (SIPO) converts the received bit serial stream to
a byte serial stream. The SIPO searches for the SONET/SDH framing pattern
(A1, A2) in the receive stream, and performs serial to parallel conversion on octet
boundaries.
10.2
Receive Section Overhead Processor (RSOP)
The Receive Section Overhead Processor (RSOP) provides frame
synchronization, de-scrambling, section level alarm and performance monitoring.
10.2.1
Framer
The Framer Block determines the in-frame/out-of-frame status of the receive
stream.