PM7347 datasheet(296/341 Pages) PMC

296 / 341 page

S/UNI®-JET Data Sheet

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Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

296

Document ID: PMC-1990267, Issue 3

Figure 31 Receive Bipolar DS3 Stream

RPOS

RNEG

3 consec 0s

LCV

RCLK

The Receive Bipolar DS3 Stream diagram (Figure 31) shows the operation of the S/UNI-JET

while processing a B3ZS encoded DS3 stream on inputs RPOS and RNEG. It is assumed that the

first bipolar violation (on RNEG) illustrated corresponds to a valid B3ZS signature. A LCV is

declared upon detection of three consecutive zeros in the incoming stream, or upon detection of a

bipolar violation which is not part of a valid B3ZS signature.

Figure 32 Receive Unipolar DS3 Stream

RCLK

RDATI

X1 BIT

RLCV

X2 BIT

INFO 84

C BIT

INFO 1

INFO 2

INFO 3

INFO 4

INFO 5

OR P OR M BIT

OR F BIT

INFO 84

INFO 1

LCV INDICATION

The Receive Unipolar DS3 Stream diagram (Figure 32) shows the complete DS3 receive signal

on the RDATI input. LCV indications, detected by an upstream B3ZS decoder, are indicated on

input RLCV. RLCV is sampled each bit period. The PMON LCV Event Counter is incremented

each time a logic one is sampled on RLCV.

Figure 33 Receive Bipolar E3 Stream

RCLK

RPOS

RNEG

4 consec 0s

LCV

X 00V

HDB3 Signature Pattern

000 V

PM7347 Datasheet(PDF) 296 Page - PMC-Sierra, Inc

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