PM7375-SC datasheet(59/430 Pages) PMC

59 / 430 page

PM7375 LASAR-155

DATA SHEET

PMC-931127

ISSUE 6

LOCAL ATM SAR & PHYSICAL LAYER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

9.1.1.1 Fig. 9.1 Jitter Tolerance Mask

Jitter Freq. (Hz)

0.1

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 LASAR-155's

internal clock difference detector: if the recovered clock drifts beyond 488 ppm of

the reference, the PLL locks to the reference clock.

9.1.2 Serial to Parallel Converter

The Serial to Parallel Converter (SIPO) converts the received bit serial SONET

stream to a byte serial stream. The SIPO searches for the SONET/SDH framing

pattern (A1, A2) in the incoming stream, and performs serial to parallel conversion

on octet boundaries.

9.2

Receive Framer and Overhead Processor

The Receive Framer and Overhead Processor block frames to an incoming STS-3c

(STM-1) or STS-1 SONET/SDH stream and performs all the SONET section, line

and path overhead processing. Section, line and path processing are performed

using the Receive Section Overhead, Receive Line Overhead and the Receive Path

Overhead Processors as described below.

PM7375-SC Datasheet(PDF) 59 Page - PMC-Sierra, Inc