HP 37717C Manual de usuario

pdhman.book : fcover.doc 1 Tue Oct 14 15:00:20 1997

HP 37717C

Communications

Performance Analyzer

PDH / DSn

Operating Manual

pdhman.book : fcover.doc 2 Tue Oct 14 15:00:20 1997

Hewlett-Packard Limited

Communications Measurements Division

South Queensferry

West Lothian, Scotland EH30 9TG

Copyright Hewlett-

Packard Ltd.1997

Reproduction, adaption,

or translation without prior

written permission is

prohibited, except as

allowed under the

Information in this

document may apply to

modules which use the

VxWORKS TM software.

The VxWORKS TM

software was developed by

Wind River Systems, Inc.,

which has copyright to it.

HP Part No. 37717-90283

First edition,September 97

Printed in U.K.

Warranty

The information contained

in this document is subject

to change without notice.

Hewlett-Packard makes no

warranty of any kind with

regard to this material,

including, but not limited

to, the implied warranties

or merchantability and

ﬁtness for a particular

purpose.

Hewlett-Packard shall not

be liable for errors

contained herein or for

incidental or

consequential damages in

connection with the

furnishing, performance,

or use of this material.

WARNING

Warning Symbols Used

on the Product

The product is marked

with this symbol when the

user should refer to the

instruction manual in order

to protect the apparatus

against damage.

The product is marked

with this symbol to

indicate that hazardous

voltages are present

The product is marked

with this symbol to

indicate that a laser is

ﬁtted. The user should

refer to the laser safety

information in the

Calibration Manual.

pdhman.book : pdhfront.doc iii Tue Oct 14 15:00:20 1997

PDH / DSn Operating Manual

HP 37717C Communications

Performance Analyzer

pdhman.book : pdhfront.doc iv Tue Oct 14 15:00:20 1997

The HP 37717C PDH /DSn Operating Manual explains the following:

• How to select and use the PDH / DSn features provided with the PDH /DSn

options

• How to make PDH / DSn measurements

For some operations and measurements, information from one of the following

associated books may be required:

“The HP 37717C Mainframe Operating Manual” explains how to obtain the

required display, how to use the front panel keys, how to interpret the status

indicators, how to connect to external equipment and how to perform instrument

tasks associated with the HP 37717C irrespective of the option conﬁguration.

“The HP 37717C SDH / SONET Operating Manual” describes the selection of

SDH / SONET features and how to perform SDH / SONET tests with the HP

37717C Communications Performance Analyzer.

“The HP 37717C Jitter Operating Manual” describes the selection of Jitter

features and how to perform Jitter tests with the HP 37717C Communications

Performance Analyzer.

“The HP 37717C ATM and LAN Operating Manual” describes the selection of

ATM and LAN testing features and how to perform ATM and LAN tests with the

HP 37717C Communications Performance Analyzer.

About This Book

pdhman.book : pdhmanTOC.doc v Tue Oct 14 15:00:20 1997

Contents

1 HP 37717C PDH / DSn Features

Introduction to PDH / DSn 2

Options With PDH / DSn Capability 3

Unstructured PDH Generation and Measurement. Option UKK (USB) 3

Structured PDH Generation and Measurement. Options UKJ (USA) and UKN (USE) 4

DS1, DS3, E1 and E3 Transmit and Receive Interfaces for ATM Payloads. Option UKZ 5

E1, E3 and E4 Transmit and Receive Interfaces for ATM Payloads. Option UKN (USE) 6

Binary Interfaces. Option UH3 (US7) 7

Multiple PDH Outputs. Option UHC (US6) 8

PDH / DSn Display Reference 9

Unstructured PDH Generation and Measurement. Option UKK (USB) 9

Structured PDH Generation and Measurement. Options UKJ (USA) or UKN (USE) 11

DS1, DS3, E1 and E3 Transmit and Receive Interfaces for ATM Payloads.

Option UKZ 15

E1, E3 and E4 Transmit and Receive Interfaces for ATM Payloads. Option UKN (USE) 19

Binary Interfaces. Option UH3 (US7) 22

2 PDH / DSn Testing With The HP 37717C

Alarm Monitoring 26

Analysis of N X 64 kb/s 29

BERT Testing 33

Cross Multiplexer Testing 38

FAS Monitoring 44

Frequency Measurement 48

Frequency Offset Tolerance 51

Multiplexer Testing 55

Round Trip Delay 60

M2100, M2110, M2120 Analysis 63

Monitoring DS3 with ATM Payloads 67

pdhman.book : pdhmanTOC.doc vi Tue Oct 14 15:00:20 1997

Contents

pdhman.book : pdhmod.doc 1 Tue Oct 14 15:00:20 1997

1HP 37717C PDH / DSn Features

Information on the optional modules including

selection of the features available.

Introduction to PDH / DSn page 2

Options With PDH / DSn Capability page 3

Unstructured PDH Generation and Measurement. Option UKK (USB) page 3

Structured PDH Generation and Measurement. Options UKJ (USA) and UKN (USE) page 4

DS1, DS3, E1 and E3 Transmit and Receive Interfaces for ATM Payloads. Option UKZ

page 5

E1, E3 and E4 Transmit and Receive Interfaces for ATM Payloads. Option UKN (USE)

page 6

Binary Interfaces. Option UH3 (US7) page 7

Multiple PDH Outputs. Option UHC (US6) page 8

PDH / DSn Display Reference page 9

Unstructured PDH Generation and Measurement. Option UKK (USB) page 9

Structured PDH Generation and Measurement. Options UKJ (USA) or UKN (USE) page 11

DS1, DS3, E1 and E3 Transmit and Receive Interfaces for ATM Payloads. Option UKZ

page 15

E1, E3 and E4 Transmit and Receive Interfaces for ATM Payloads. Option UKN (USE)

page 19

Binary Interfaces. Option UH3 (US7) page 22

pdhman.book : pdhmod.doc 2 Tue Oct 14 15:00:20 1997

HP 37717C PDH / DSn Features

Introduction to PDH / DSn

The Plesiochronous Digital Hierarchy (PDH / DSn) is still the dominant technology

in most existing telecommunications networks throughout the world, although it is

being replaced in many networks by Synchronous Digital Hierarchy (SDH) or

SONET networks. PDH / DSn networks were developed at a time when point-to-

point transmission was the predominant network requirement. To support this

requirement, the standard approach to network management and maintenance was to

use manual distribution frames for access to individual signals. This is now

considered out of date and consequently SDH / SONET is now the preferred

network topology for new installations.

However PDH / DSn networks will exist for a long time to come even in networks

where SDH /SONET is the preferred technology. PDH is the ETSI international

standard, based on 2 Mb/s, deﬁned by the ITU-T, and covers the hierarchal

transmission rates of 2 Mb/s, 8 Mb/s, 34 Mb/s and 140 Mb/s. DSn is the ANSI

standard covering transmission rates of 1.544 Mb/s (DS1) and 44.736 Mb/s (DS3).

PDH is asynchronous at 8 Mb/s, 34 Mb/s and 140 Mb/s. In order to access a signal,

for rerouting or test purposes, the whole line signal structure must be demultiplexed

step by step down to the 2 Mb/s level, because of the asynchronous nature of the

multiplexing.

At each multiplexing step, the bit rate of the individual tributary signals is controlled

within speciﬁed limits and is not synchronized with the multiplex equipment.

Because the bit rates of the individual tributaries are controlled within speciﬁc limits

this type of multiplexing is referred to as Plesiochronous i.e. nearly synchronous.

The individual tributaries are synchronized with the equipment at each multiplex

step by the process of positive bit stufﬁng justiﬁcation.

In new SDH / SONET networks, PDH / DSn signals are mapped into virtual

containers / tributaries before being transported as part of the SDH / SONET

payload. The SDH / SONET payload must then be demapped into a PDH / DSn

tributary signal.

Therefore all PDH / DSn, SDH / SONET and mixed PDH/SDH DSn / SONET

networks require test sets which have PDH / DSn interfaces and PDH / DSn test

capability.

pdhman.book : pdhmod.doc 3 Tue Oct 14 15:00:20 1997

HP 37717C PDH / DSn Features

Options With PDH / DSn Capability

Unstructured PDH Generation and Measurement. Option UKK (USB)

Option UKK (USB), Unstructured PDH, provides generation and

measurement of unstructured PDH at interface rates of 704 kb/s, 2.048 Mb/

s, 8.448 Mb/s, 34.368 Mb/s and 139.264 Mb/s.

Allows the addition of Frequency Offset to the PDH signal

Provides 75 Ωunbalanced or 120 Ωbalanced input and output interfaces.

Allows selection of PRBS, WORD or USER patterns

Allows selection of Line Code AMI, HDB3 or CMI

Provides an ECL pulse each time an error occurs (Error Out)

pdhman.book : pdhmod.doc 4 Tue Oct 14 15:00:20 1997

HP 37717C PDH / DSn Features

Structured PDH Generation and Measurement. Options UKJ (USA) and

UKN (USE)

Structured PDH Generation and Measurement. Options UKJ (USA) and

UKN (USE)

Options UKJ (USA) and UKN (USE), provide generation and

measurement of Structured or Unstructured PDH at interface

rates of 2.048 Mb/s (E1), 8.448 Mb/s (E2), 34.368 Mb/s (E3)

and 139.264 Mb/s (E4).

Structured test signal rates of 64 kb/s, 2.048 Mb/s, 8.448 Mb/s

and 34.368 Mb/s are provided.

Frequency Offset can be added at the interface rates.

Line rate frequency can be measured.

Provides 75 Ωunbalanced or 120 Ωbalanced input and output

interfaces.

Allows selection of PRBS, WORD or USER patterns

Allows selection of Line Code AMI, HDB3 or CMI

Interface and test signal rates can be Framed or Unframed

MUX connector allows a 2 Mb/s signal from external equipment

to be inserted into the HP 37717C test signal.

DEMUX connector allows a 2 Mb/s signal from the HP 37717C

to be Dropped to external equipment.

Option UKN (USE) also provides generation and measurement

of PDH signals with ATM payloads. Option UKN (USE)

therefore provides all of the PDH facilities described here with

the additional facilities described on page 6.

Information on the ATM capabilities of the UKN (USE) module

is given in “The ATM Operating Manual”

Option UKJ (USA)

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