Agilent Technologies 83446A, 83446B User Manual

User

and

Service Guide

Agilent

83446A/B

Lightwave Clock/Data

Receiver

Agilent

Edition

1400

Santa

part

1

Printed

F

ountaingrove

Rosa,

95403-1799,

Notice

.

The

without

with

warranties

T

echnologies

notice

regard

of

consequential

of

this

material.

number:

83446-90018

in

US

A

P

arkway

CA

US

A

information

.

to

Agilent

this

T

material,

merchantability

shall

not

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in

March

2000

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contained

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no

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for

a

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contained

the

furnishing,

is

subject

to

, the

herein

to

change

of

any

kind

implied

purpose

or

.

for

incidental

performance

Agilent

,

or

or

use

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Government

of

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252.227-7013

Commercial

other agencies

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Copyright Agilent T

Rights

Rights

is

subject

in

T

echnical Data

for

DOD

Computer

.

Legend.

Use

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agencies

Software

echnologies 2000

,

duplication, or

as set

and Computer

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and

subparagraphs

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disclosure by

forth in

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Rights

subparagraph

clause

(c) (1)

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clause

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at

DF

(c)

(2)

52.227-19

.S

ARS

.

(1)

(ii)

of

the

for

All Rights Reserved. Reproduction, adaptation, or translation without prior

written permission is prohibited, except as allowed under the copyright laws

.

Printing

History

Agilent

Part

Number

83446-90004 Edition1October

83446-90011 Edition1June

83446-90018 Edition1March

Edition Date

1994

1995

2000

iii

C

W

AU

A

Safety

The

following safety

yourself

Symbols

with each

symbols

of

the

are

symbols

used

and

throughout

its

meaning

this

before

manual.

operating

F

amiliarize

this

instrument.

The

TI

O

N

caution

procedure

damage

sign

until

The

R

N

I

N

G

warning

procedure

in

injury

indicated

sign

which, if

to

or

destruction

the

indicated

sign

which, if

or

loss

conditions

denotes a

not correctly

conditions

denotes

not

of

life

.

are

hazard

performed

of

the

instrument.

a

life-threatening

correctly

Do

not

proceed

fully

understood

to

the

instrument.

are

fully

performed

beyond

or

adhered

Do

not

understood

hazard.

or

adhered

a

warning

and

met.

It

calls

to

,

proceed

and

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user

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instrument

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power

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to

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the

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instructions

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Safety

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on

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conductor

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make

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contact.

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power

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instrument,

in

personal

injury.

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equipment

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same

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Failure to ensure adequate earth grounding by not using

instrument

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operator

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or

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type

and ratings

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this cord may cause

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CAUTION

This product has autoranging

within the specied range

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line voltage input. Be sure the supply voltage is

v

Certication

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Agilent

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Declaration

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EXCLUSIVE

FOR

viii

Contents

1.

General

Description

F

ron

Rear

Agilen

Electrostatic

Reducing

2.

Installation

Installing

Step

Step

Step

Step

Step

Connecting

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P

erforming

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w

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Instrumen

Sales

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Information

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panel

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83446A/B

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4.

Connect

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urn

est

Set

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Return the

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k

aging

and service

Connections for

o clean

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o test

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a

an adapter

insertion loss

test

return

of

the

Agilen

features

features

Sp

Disc

harge

ESD

damage

and

Preparation

Agilen

ect

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line

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connector

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and

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for

Use

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selector

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83446A/B

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83446A/B

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Characteristics

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Service

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Measuremen

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1-3

1-6

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1-8

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1-9

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1-12

1-14

2-3

2-3

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2-5

.

2-6

2-7

.

2-10

.

2-11

.

2-13

.

2-13

.

2-15

.

2-15

.

2-16

.

2-17

.

2-19

.

2-21

.

2-22

.

2-23

2-23

3. Using

the Agilent 83446A/B

Bit-Error-Ratio T

Example of measuring disp

single-mode b er .

System sensitivity calibration .

Determining dispersion po

Bit-Error-Ratio T

est

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est .

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wer penalt

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wer penalt

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y . . . . .

yof

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. . .

Contents-1

3-3

3-3

3-4

3-7

3-10

Replaceable

parts

W

4.

Servicing

General

T

Adjustmen

P

Replacemen

Replaceable

Example

aveform

Example

roublesho

P

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Photo

erformance

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est

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Replacing

Replacing the

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of

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est

of

signal

the

information

oting

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er

supply

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cedure

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Sensitivit

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Maximum

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Electrical output

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Rear-panel

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Input

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measuring

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Agilent

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Pro

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bly adjustmen

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(functional

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3-11

.

3-13

c

k

3-13

.

4-3

.

4-5

.

4-8

.

4-8

t

.

4-10

.

4-11

.

4-15

.

4-20

.

4-21

.

4-23

.

4-24

.

4-26

.

4-27

.

4-28

4-30

.

4-31

4-32

Index

Contents-2

Figures

1-1.

1-2.

1-3.

1-4.

2-1.

2-2.

2-3.

2-4.

3-1.

3-2.

3-3. Setup

3-4. Setup

4-1.

4-2.

4-3.

4-4.

4-5.

4-6.

4-7.

Agilent 83446A/B

The Agilent

The Agilent

Example of

Opening the

Selecting

A

C

power

Connecting

system.

Setup

Setup

ber.

clock. .

Agilent

Laser

Agilent

Wiring

Wiring

Agilent

Agilent

83446A/B

83446A/B rear

a static-safe

fuse holder

the

line

cables

the

..

for

calibration

to

measure

..

..

for optimizing

for measuring

..

83446A/B block

transmitter

83446A/B

diagram

Diagram

83446A/B

83446A/B

block

front-panel.

voltage

available

Agilent

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of

dispersion

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laser

eye

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for

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panel.

work

station.

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value

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83446A/B

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dispersion

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extinction

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line

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supply

level

hardware

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and

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to

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parts

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from

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..

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1-4

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1-6

.

1-8

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1-13

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2-5

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2-6

. 2-9

.

2-11

3-4

. 3-7

.

3-12

.

3-14

.

4-5

.

4-12

.

4-16

.

4-28

.

4-30

.

4-34

. 4-36

Contents-3

T

ables

1-1.

Agilent 83446A/B

1-2.

Static-Safe A

2-1.

Agilent 83446A/B

2-2.

Agilent T

3-1.

Average

4-1.

Required

4-2.

V

oltages

4-3.

Required

4-4.

Laser Transmitter

4-5.

Sensitivity

4-6.

Input

4-7. T

orque V

4-8. Line

4-9. DC

Gating P

Optical

alues .

Module to

Power

4-10. Assembly-Level

4-11.

Replaceable

Specications

ccessories

Power

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.

Requirements

echnologies Service

eriod

to

A

T

ools

.

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.

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on

the

DC

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Equipment

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Setup

Return

DC

Supply

Setup

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erminal

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Replaceable P

Hardware .

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and

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Numbers

chieve

Supply

Supply

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..

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.

100

.

T

erminals

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..

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Connections

Connections

arts

.

.

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.

.

Characteristics

.

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.

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.

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.

.

.

.

Errors

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..

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.

.

..

.

.

.

.

.

.

..

.

.

.

.

.

.

.

.

.

1-10

.

1-14

.

2-7

.

2-18

.

3-5

. 4-4

. 4-7

4-11

.

4-13

.

4-17

.

4-24

4-27

.

4-29

.

4-30

.

4-35

.

4-37

Contents-4

1

General

Information

General

What

you'll nd



A

brief

description



A

list

of

options and



Agilent

83446A/B



Information



Information

Information

in this

chapter

of the

Agilent 83446A/B

accessories available

about

about

specications

the

lightwave

avoiding

and characteristics.

receiver's

damage

to

lightwave clock/data

.

serial number

the

instrument

receiver.

label.

from electrostatic

discharge

.

1-2

Description

The

Agilent 83446A/B

clock

operate

and data

at the

information

following SONET/SDH

of

the

lightwave

Agilent 83446A/B

from

clock/data

digitally

receivers

modulated

rates:

are

designed

lightwave

to

signals

extract

.

They

Select

optical

electrical

Monitor

the

analog

input

the

quality

eye

Agilent

Agilent

Both

G.958,

ranges

Agilent

An

or

input

electrical

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of

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by

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83446A

83446B

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71604B

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recommendations

1310/1550

bit-error-ratio

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A

slide

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the

not

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can

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to

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input

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electrical

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:

:

:

:

:

:

:

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:

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:

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:

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:

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of

nanometer

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clock

and

the rear

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panel electrical

both the

monitor

output

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the

incoming

::

2.48832 Gb/s

::

:

622.08

ITU-T

G.957,

wavelength

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such

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data

from

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front

the

quality

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output

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Mb/s

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an

and

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ouput on

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not conform to the requirements for e

GR-253-CORE. F

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the front

mask

panel is

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intended for

testing.

monitoring purposes

The

frequenc

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response

ye mask testing as described in ITU-T G.957 and Bellcore

or mask testing use an appropriate reference receiver

of

only and

the

should

auxiliary output

not

be

does

, such as the Agilent 83440-series

reference receivers.

1-3

General

Information

Description of

F

or

more

Chapter

3.

the Agilent

information

83446A/B

on

using

the

lightwave

clock/data

receiver

refer

to

Learning the

story

.

.

.

inside

The block

The

photodetector

The

single-mode

when

diagram

for

optical-to-electrical

which

optical

used

input

or

multimode

with

uses

62.5

automatic-gain-control

switch,

receiver's

hybrid.

circuit. The

signal.

signal.

interface

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split

front

The

data

Clock

The

phase

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into

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clock

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two

signal

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threshhold-detected

data

relationship

the

Agilent

conversion

covers

50

the

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ber

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0.25

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1-1

APD

ranges

with

the

output

to

the

front

.

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either

results

in

MMIC

on

recovery

clock

incoming

panel

an

the

loop

1-4

Figure 1-1. Agilent 83446A/B block diagram.

Description of

General

the Agilent

Information

83446A/B

Accessories

Options

Serial

Numbers

supplied

The

Agilent 83446A/B

P

ower cable

FC/PC

A

gilent 83446A/B

The

following

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The

010

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introduction

Agilent

their

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performance,

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Whenever

have

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serial-number

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information

number

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(refer to

front-panel connector

option

Optics Handbook

and

to

each

you

contact

complete

and

accurate

the

serial

Whenever

about

lightwave clock/data

Figure 2-3

interfaces

Lightwave Clock/Data

is

available:

Deletes FC/PC

front-panel connector

, Agilent

reference

for

ber-optic measurements

makes frequent

usability,

or reliability

personnel have

type

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equipment,

Agilent

serial

number

T

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information

label

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number

you

your

and

specify

lightwave

the

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part number

improvements

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based

available

possible

to

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rear

the

options

serial

receiver

,

receiver is

Receiver

User

5952-9654, is

to

to

control

complete records

on

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equipment's

about

your

to

ensure

obtaining

.

of

the

lightwave

installed

number

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sure

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shipped with:

and

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its

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Agilent

of

serial

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lightwave

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use

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complete

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to

enhance

design

number

receiver

most

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obtaining

.

.

,

1-5

General

Information

Description of

Front-panel features

the Agilent

83446A/B

1-6

Figure

1-2.

The

Agilent

83446A/B

front-panel.

1.

Line

switch.

2.

P

owerline

3.

CLOCK

for

Agilent

output is

synchronized

clock

frequency

4.

SYNC

LOSS

synchronized

remain

at

DATA

5.

DATA

OUT

corresponding

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transitions

6.

AUXILIARY

version

is

amplitude

0

23

dBm.

stabilized

of

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LED

.

OUT

connector

83446B).

synchronized

to

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.

indicator

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synchronized

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connector

to

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connector

of

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so

its

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signal.

the

to

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6

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Description of

2.48832

GHz

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near

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When

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signal

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this port

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amplitude

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the

amplitude

Information

83446A/B

this

not

OUT

can

of

errors

to

7.

REAR

switch

8.

OPTICAL

input

adapters

PANEL

on

IN

is

+10

from the

INPUT

the

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connector

dBm.

indicator

panel

This

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This

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to the

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Maximum

input accepts

LED is

signal

Agilent 81000-series

REAR

input is

any of

.

on

when

position.

0

9

the connector

the

dBm,

input

damage

selector

level

interface

1-7

General

Information

Description of

the Agilent

83446A/B

Rear panel

1.

P

ower

line

2.

CLOCK

electrical

RECOVERY

signal.

features

Figure

module

.

INPUT

1-3.

The

connector

Agilent

83446A/B

.

Use

to

recover

rear

panel.

clock

and

data

from an

3.

1-8

CLOCK

optical

RECOVERY

input

and

INPUT

rear

SELECT

electrical

switch.

input.

Use

to

select

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front

Agilent

83446A/B

istics

T

able 1-1

values

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nonwarranted,

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0

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the instrument's

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provide

performance parameters

italics.

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performance which

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characteristics

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been

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temperature

apply

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minutes

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printed

indicates

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value

of

nominal

in

the

of

1-9

General

Agilent 83446A/B

Data

rate

2

Sensitivity

3

Data amplitude

Clock

amplitude

Maximum

Input

W

Maximum

Output

RMS

3

Maximum

Allowable

Electrical

a

v

elength

dB

operating

optical

range

safe

electrical

at

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at

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at

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jitter

on

bandwidth

safe

mark

clock

Auxiliary output

>

0

23

>

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27

Auxiliary

output

Information

4

5

input

return

loss

,

continuous

return

GHz

GHz

GHz

clock/data

at

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electrical

density range

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Specications and

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power

6

Characteristics

optical

input

loss

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7

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clock

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input

sensitivity

input)

Agilent

1

power

outputs)

input

Characteristics

83446A/B

Specications

Agilent

2.48832

0

0

1200{1600

10

0.0001{1.5

200

<

6

dB down

signal

and

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83446A

Gb/s

27

(

6

dBm

0.5%)

Agilent

622.08

0

83446B

Mb/s

28

0.5 Vp-p 0.5 Vp-p

0.4

0

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0

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5

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9

12

Vp-p

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dB down

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0.25

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Vp-p

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0.25

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Vp-p

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from input

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6

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dBm

dB

nm

peak

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GHz

from input

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at

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nm

and

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4

Sensitivity specication applies

5

Noninverting outputs.

6

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7

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dB

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0

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bit

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1-10

SONET/SDH-Compliant DFB

23

0

using 2

1 PRBS

are applied

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

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

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single mode ber input.

6

0.25 unit interval.

pattern with

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both

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optical

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at

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specied

data

rate

,

NRZ

coding

format.

and

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electrical

input.

T

able

1-1.

Agilent

83446A/B

Agilent 83446A/B

Specications

Specications and

and

Characteristics,

General

Characteristics

continued

Information

T

emperature

GENERAL

Range

SPECIFICA

Operating 0C

Storage

Humidity

Altitude

EMI

Compatibility

P

ower

Requirements

P

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Installation

P

ollution

Category

Degree

Usage

Weight

(characteristic)

Dimensions

Optical

Output

(H

2

Input

Connector

Connectors

W

2

D)

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ANEL

TIONS

to

0

40Cto

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31C

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100/120/220/240

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or indoor

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kg

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3.9

2

INPUT

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OUTPUT

50/125

adapters

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+55

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+75

relative humidity

decreasing

to 15,000

and radiated

Publication 11

consumption

II

per

I.E.C

2

per

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use

.

(7.5

lb)

21.3

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36

84

2

14.2

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multimode

in

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female

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emissions

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A

max

connector

for

temperatures

relative humidity

meters).

meet

the

55011

Group

to

63

Hz

compatible

up

to

at

requirements

1,

with

1-11

Electrostatic

Discharge

Information

Electrostatic

All

work on

station.

types

of ESD



Conductive table-mat



Conductive

Both

types

Of

the two

ESD

protection

To

ensure user

of isolation

static-safe accessories

W

A

R

N

I

N

G

These

working

discharge (ESD)

electronic

Figure 1-4

protection:

oor-mat

,

when

,

only

when

safety,

from ground.

techniques

on

circuitry

shows an

used

the

table-mat

used

.

for

can

assemblies

example

and wrist-strap

and

heel-strap

together

,

provide

and

alone

.

the

static-safe

Refer

to

a

static-safe

with

a

voltage

damage

should

of

combination.

combination.

wrist-strap

accessories

T

able

1-2

work

potential

or

destroy

be

performed

a

static-safe

a

signicant

combination

for

station

electronic

at

work

level

must

provide

information

should

greater

not

than

components

a

static-safe

station

of

ESD

provides

at

on

ordering

be

used

500

work

using

protection.

adequate

least

1

M

when

volts

.

.

two

1-12

General

Electrostatic Discharge

Information

Information

Figure

1-4.

Example

of

a

static-safe

work

station.

1-13

General

Information

Electrostatic Discharge

Information

Reducing ESD

The following

testing and



Before

time each

suggestions may

servicing operations

connecting any

day

damage

coaxial cable

,

momentarily

help

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ground

reduce

to

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cable.



P

ersonnel

touching

assembly

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Be

sure that

buildup of

T

able

1-2 lists

T

echnologies

Agilent

should

the

from

static charge

Part

be

grounded

center

all instruments

the

pin

unit.

of

any

are

.

static-safe accessories

using the

Agilent part

T

able

1-2.

with

a

resistor-isolated

connector

properly

that

numbers

Static-Safe

Number Description

9300-0797 Set

9300-0980 Wrist-strap

wire

includes:

.

(The

3M

static

wrist-strap

cord

1.5

m

control

and

(5

mat

wrist-strap

ft).

0.6

cord

ESD

damage

an

instrument

center

and

and

before

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2-16

How to

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Return the

Agilent

T

for

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83446A/B

able

2-2.

for

Agilent

Service

T

echnologies

Austria 01/25125-7171

Belgium 32-2-778.37.71

Brazil (11)

China 86

7297-8600

10 6261

Denmark 45 99

Finland 358-10-855-2360

France 01.69.82.66.66

German

y

0180/524-6330

India 080-34

Italy +39

Ireland 01

615

Japan (81)-426-56-7832

Korea 82/2-3770-0419

Mexico (5) 258-4826

Netherlands 020-547

Norwa

y

22

73

Russia [phone]

Spain (34/91)

Sweden 08-5064

Switzerland (01)

United

Kingdom

United

States

and

Canada

01

(800)

735

344

Service

12

88

35788

02

9212

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59

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power meter

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Servicing

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4-2

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this lightwave

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lightwave receiver

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4-3

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Agilent

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lightwave receiver

exceed

input

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safe input-level

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T

able

Description Agilent

Small

Pozidriv

screwdriver

Wire cutter 8710-0012

L

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pliers

3/16

nut

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open

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service

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Part

Number

8710-0899

8710-1107

N/A

8720-0015

8710-1894

8710-1217

8710-1222

8710-1623

8710-1622

P/N

74Z-0-0-225

electronic components

at

a

in

Chapter

the

static-safe

clock/data

work

1

for

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.

4-4

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The

main functional

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clock/data

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for ve seconds after disconnecting the plug from its power supply

.

4-5

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Agilent

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83446A/B

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40 to

The

preamp

stage

GaAs

input,

The

indicates

The

may

and

chip

light enters

a multimode

light to

100V range

APD output

stage.

, which

outputs a

SPDT switch

to the

CDR hybrid

CDR input

when

CDR hybrid

be

noisy

and

data

signals

also

generates

signal is

The preamp

can be

the

recovers

are

pulse-stretched and

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to

internal

Two

dierent

the

and

means

step in

a

detection threshold.

the

adjustment

samples

signal

routed

buer

level

to

of

observing

of

the

ampliers

of

the

the InGaAs

ber front

a current

by a

thermally

converted to

output

xed

routes either

through

selected

rear-panel

synchronous

corrupted

ac

coupled

an

indication

used to

CDR

recovery

The

optimizes this

CDR

hybrid

.

The

the

detected

A

uxiliary

the

Output

CDR

avalanche photodetector

panel connector

replica of

the

modulation.

compensated

a

voltage

is

ac

coupled

signal

level

independent

this

A

GC

output,

about

3.5

dB

by

a

rear-panel

electrical

by

transmission distortion.

to the

of

drive

exact

input

rst

optical

hybrid

input

is

clock

signals

front-panel output

its synchronization

a

front-panel

process

setting

setting

amplier

are

is

to

of

this

for

optimum

routed

drives

signal.

port

on

the

input

waveform

.

The

high

and

to

a

or

of

power

switch.

active

sync

compare

threshold

through

The

second

front

APD

The

voltage

amplied

linear

of

the

the

rear

splitting

A

front-panel

.

and

data

Both clock

ports.

status,

loss

LED

the

sensitivity

loss

the

A

GC

signal

panel.

quality

diode

converts

APD

is

bias

by

gain

controlled

optical

panel

signals

The

which is

.

corrupted

is

critical.

.

pads

detector

is

This

provides

.

(APD)

the

biased

supply

a

low

noise

input.

electrical

loss

.

LED

which

signals

CDR

input

An

to

to

amplied

in

.

A

set

a

T

roubleshooting

power

supply

the

If

the

+5

V

power supply

a current-limiting

low,

use the

of the

bring the

voltage cannot

R12

clock/data receiver

power supply

be brought

or overvoltage

potentiometer

output voltage

crowbar

to

decrease

. Decreasing

back to

normal

within tolerance

is low

mode

the

the

voltage

operation.

, disconnect

,the

.

If

the

voltage

and

If

power

power

,

then

cycling

the

power

the power

supply

supply

cycle

the

supply

could

is

the

power

supply

be

too

power

may

output

from the photodetector and electrical amplier unit, and recheck the +5 V

power supply

. If the power supply is still low

, replace the power supply

.

If the power supply is operational, suspect the photodetector/clock/data

assembly.

4-6

in

The

0

12

terminals

V

are

power

supply

described

T

able

4-2.

in

V

is

not

T

able

oltages

used.

4-2

.

on

the

The

DC

voltages

P

ower

Supply

Servicing

on

the

T

erminals

the

Agilent

Troubleshooting

power

83446A/B

supply

T

E2,

E2,

E1,

E1,

E1,

erminal

0

OUT

+OUT

0

OUT

COM

+OUT

0

5.2V

Common

0

12

V

Common

+12

V

Description V

0

power

ground

power

ground

power

supply

supply

supply

5.32

0

Vdc

0

12

0

Vdc

+12.12

Vdc

Vdc

(approximate)

Vdc

6

6

oltage

10

10

mV

mV

4-7

A

djustment

P

ower

The

power

multimeter

supply

power

W

A

R

N

I

N

G

Only

instrument

power

seriously

supply

clock/data

supply

(or

terminals

supply

trained

chassis

supply

injured

.

.

service

Procedures

adjustment procedure

receiver

T

o

equivalent)

.

transformer

has several

adjust the

If

the

dc

personnel

.

Use

extreme

if

you

contact

adjustments,

power supply

to

measure

output

voltage

should

care

carry

ac

line

them

the

.

when

,

use

dc

output

is

not

perform

The

exposed

voltage

power

two of

an

which are

Agilent

3456A

voltage

within

tolerance

measurements

terminals

.

Y

ou

can

is

applied.

be

at

killed

on

digital

the

,

adjust

inside

on

the

power

the

the

the

or

1.

On

the

terminal

2.

Measure

+5.32

N

O

The

is

adjusted above

TE

+5

power

Vdc

V

power

and

the

the

power

6

10

supply

+5.8

supply

+OUT

mV

.

circuit

V

(approximate),

board,

supply

has

connect the

terminal

output

current-limiting

the

+5

of

E2 on

voltage

and

V

power

multimeter

the

dc

. The

voltage

overvoltage

supply

will

power

control.

shut

between

supply

reading

If

the

down.

+5

the

.

should

V

power

0

OUT

be

supply

3. If the voltage reading is not +5.32 Vdc, adjust the +5V ADJ potentiometer

(R12) for a reading of +5.32 Vdc

4. On the power supply board, connect the multimeter

6

10 mV

.

between COM and

+OUT.

4-8

5.

Measure the

+12.12

6.

If the

+12.12

Vdc

voltage

Vdc

power supply

6

10 mV

.

is

not

+12.12

6

10

mV

.

output voltage

Vdc,

adjust

.

the

The

+12V

Servicing

voltage

ADJ

the

Agilent

83446A/B

Adjustment Procedures

reading

for

a

reading

should

be

of

4-9

Servicing

the

Agilent

83446A/B

Adjustment Procedures

Photodetector/clock/data recovery

adjustment

There

are three

assembly



The R50



The

.

R82

sensitivity



The

R78

specied

Since

the

equipment setup

instrument sensitivity

performance

Replacement

factory

ages

pre-adjusted.

.

procedure

adjustments

+V

APD

adjust

Threshold

A

sets

djust

on

the

sets

.

High

Input

Limit

Set

error

rate

.

is the

,

the

adjustment

test.

photodetector/clock/data

Slight

re-adjustments

the

photodetector/clock/data

APD

bias

for

optimum

the

CDR

detection

sets

maximum

same as

operating

the setup

procedures

recovery

assemblies

may

assembly

threshold

required

are

included

be

required

recovery

sensitivity

for

power

for

for

testing

after

come

from

as

the

.

optimum

the

the

the

instrument

4-10

P

erformance

The

performance tests

T

ests

in

T

this

section

able 4-3.

require

Required T

est

Equipment

the

following

test

equipment:

Agilent

Model

Number

70001A modular

70004A color

70841B pattern

70842B BER

70311A clock

54120B digitizing

measurement system

displa

generator

detector

source

oscilloscope

54121A four-channel

8157A optical

8153A lightwave

81536A power

81534A optical

81554SM laser

81000BR reference

81109AC patchcord

83440B

opt

050

and

optical

attenuator

option

sensor

return

source

to

multimeter

reector

HRL,

electrical

87441B STM-4/OC-12

87441D STM-16/OC-48

83440A 20

BCP

410A-23S-102

BCP

410A-33S-102

*BCP

(Broadband

305

East

Melbourne

Drive,

,

FL

32904

Communications

Suite A

Lsr

Lsr

dB pads

Xmit

Xmit

Products,

1300,

1550,

[phone]

y

module

test

012

module

loss

module

lter

lter

(3 each),

module

mainframe

set

with option

(FC/PC

module

,

1300{1550

Diamond

converter

2.5

Gbit

2.5

Gbit

Inc

.)

T

ype

connectors)

HMS-10

10

dB

*

*

mainframe

002 (1300

nm

pad

(1

each)

nm{1550

nm)

4-11

Setting

the

laser

up

and

biasing

transmitter

Servicing

Performance

1.

the

Agilent

Tests

Connect equipment

a.

Connect the

input.

b.

Connect the

c.

Connect the

d.

Connect the

e.

Initialize the

83446A/B

as in

pattern generator

laser output

attenuator output

O/E output

instruments.

Figure 4-2

to attenuator

to

the

.

output to

to the

O/E

scope

input.

the

input.

converter

laser

analog

input.

modulation

Figure 4-2. Laser transmitter setup.

2. Set the test equipment to the settings shown in T

4-12

able 4-4

.

T

able

4-4.

Laser

T

ransmitter

Setup

Servicing

the

Agilent

Performance

83446A/B

Tests

P

attern

Error

Clock

Generator

Detector

Source

2230

1

pattern

1.00

Vpp

data

0.000V data

normal

polarity

trigger

mode

23 zeroes

2230

auto

trigger pattern

1

pattern

0/1

threshold

positive clock

normal

data

auto

clock-data

gating

manual

gating

OFF

2.48832

GHz

amplitude

high level

,

clock

clock/32

edge

polarity

alignment

frequenc

(0V term.)

trigger

y

(Agilent

83446A),

622.08

MHz

(Agilent

ON

Laser

T

ransmitter

(both

1310/1550

0ptical

Attenuator

Optical P

Digitalizing

ower

Meter

Oscilloscope

nm)

analog

bias

cal

connect

clean

the

1.00

Vpp

clean

the

calibrate

fully

charged

Set

power

FC/PC

1310 nm

clean

the

FC/PC

channel

channels

100

ps/div

4

mV/div

0

400

displa

y

mode

mode

up

the

1310

optical connectors,

drive

optical connectors

to

read

actual

or

on

to

0

dBm

adapters

wavelength

connector

adapter

4

ON

1,

2,

3

OFF

(Agilent

mV trigger

persistence

nm

an

ac

83446A),

level

=

1

unit

power

adapter

sec

,

rst.

FC/PC

400

zero

adapter

ps/div

mV

(Agilent

oset

.

83446B)

Optical to Electrical Converter connected to Channel 4 on oscilloscope with STM-16/OC-48

lter for Agilent 83446A (STM-4/OC-12 lter for Agilent 83446B).

83446B)

3. With

calibration.

the laser turned o, perform the scope oscilloscope vertical

4-13

Servicing

the

Performance

4.

Turn on

oscilloscope

pattern.

5.

Use voltage

level

of V1

6.

Turn o

7.

Calculate

8.

A

djust

ratio

of

Agilent

Tests

the laser

.Set

histograms

and

the laser

the

the

pattern

between

83446A/B

and observe

atime

V0.

and

extinction

generator

6.6

window of

to

measure

ratio

and

7.4:1.

the

measure

the

(V1

output

eye

10%

the

oset

0

pattern

mean

V

o)

level,

of

level

/

the

(V0

if

on

the

eye

,

centered

\1"

level

(V

o).

0

V

o).

necessary

digitizing

in

and

the

,

for

an

the

eye

mean

\0"

extinction

4-14

Servicing

the

Agilent

Performance

83446A/B

Tests

Procedure

Test

1. Sensitivity

N

O

T

E

Allow the

1. Connect

2.

Initialize

3.

Turn

on

error

detector

should

4.
A

djust

Reset

the

for

exactly

1310

nm



Number



Error rate



Optical

P

Agilent 83446A/B

equipment as

the

test

the

Agilent

.

The

disappear

the

error

of

errors

(less than

ower

optical

10

minutes

(149

(

0

27.0

.

detector

max.

1

X

dBm

and

test

in

Figure

equipment

83446A/B

error

detector

An

eye

diagram

power

level

after

and

Agilent

83446A

0

10

)

10

max.

Agilent

equipment

as

shown

.

Initiate

for

each

then

or

83446A

to

warm

4-3

.

in

an

should

should

an

error

adjustment.

record

the

37

max.

Agilent

or

0

28.0

up

for

at

least

T

able

4-5

.

auto

clock/data

synchronize

appear

rate

of

on

less

Let

following:

83446B)

dBm

max.

Agilent

30

the

the

83446B)

minutes.

and

than

errors

alignment

the

error ag

oscilloscope

0

1

2

l0

accumulate

on

the

.

10

.

4-15

Servicing

Performance

the

Agilent

Tests

83446A/B

4-16

Figure

4-3.

Agilent

83446A/B

test

equipment

setup.

T

able

4-5.

Sensitivity

Servicing

T

est

Setup

the

Agilent

Performance

83446A/B

Tests

P

attern

Generator

2230

data

0.000V data

normal

clock

trigger mode

23

zeroes

clock

Error Detector 2230

auto

positive

normal data

auto

gating

gating

Clock

Laser

(both

Source

T

ransmitter

1310/1550

nm)

2.48832

analog

bias

connect

clean

FC/PC

drive

0ptical

Attenuator

clean

calibrate

set

FC/PC

Optical

P

ower

Meter

1310

clean

FC/PC

Digitalizing

Oscilloscope

channel

channels

100

10

2

100

0

400 mV trigger level

display persistence = 1 sec

zero mV oset

1

pattern

amplitude

polarity

trigger

input

1

pattern

0/1

threshold

clock

clock-data

manual

OFF

GHz

mode

cal

mode

up

the

adapter

set

the

to

power

adapters

nm

the

adapter

4

1,

ps/div

attenuation

mV/div

set

high level

clock/32

trigger

pattern

termination

edge

polarity

alignment

frequenc

the

1310

optical

connectors

for

6.6:1

optical

connectors

read

actual

to

0

15

wavelength

connector

ON

2,

3

OFF

(Agilent

for

6.6:1

(0V term.)

0

y

(Agilent

nm

extinction

power

dBm

83446A),

2V

unit

extinction

83446A),

rst

ratio

400

ps/div

ratio

622.08

(Agilent

on

transmitter

MHz

83446B)

(Agilent

83446B)

4-17

Servicing

the

Performance

Agilent

Tests

83446A/B

T

able

4-5.

Sensitivity

T

est

Setup

(continued)

+V

APD

adjustment

Agilent

83446A/B

5.

Substitute

Set

attenuator

power

less

record

1550



Number



Error



Optical

If the

6.

The

The

for

being

tested

the

the

drive

level

.

Connect

until

errors

than

1

2

l0

the

following:

nm

of

errors

(149

rate

(less

than 1

P

ower

(

0

27.0

test

fails

,

readjust

+V

APD

A

djustment

objective

of

near-optimum

Rear

0

15

clean the

FC/PC

1550

nm

laser

for

a

6.6:1

the

ber

0

max.

2

dBm

begin.

10

.

10

Let

Agilent

0

max.

R50

l0

the

)

Agilent

Carefully

83446A or

and

(R50)

this adjustment

sensitivity

panel

switch

dBm

input

optical connectors

adapter

transmitter

extinction

to

the

errors

37 max.

83446A

R82.

is

clearly labeled

is to

.

to

FRONT

power

in

place

ratio

.

Recalibrate

Agilent 83446A/B

adjust

accumulate

the

power until

for

Agilent 83446B)

or

0

28

dBm

max.

Agilent 83446B)

on

set

the

avalanche

of

the

exactly

the

and reduce

printed

1310 nm

unit.

the optical

the

the error

10

minutes

circuit

photodetector

rate is

and

card.

gain

W

A

R

N

I

N

G

Hazardous

when

Reduce

power

small

counterclockwise

reduce

very slightly

increase in errors

power will probably be below



Verify that sync loss indicator is

voltage

making this

the

input

until

roughly

athead

the

optical

in the counterclockwise direction, observing only a small

because

+VAPD

is nominally

100

Vdc

.

Use

caution

measurement.

optical

screwdriver

so

power

10-20

as

to

power

errors

,

slowly

minimize

.

When

until

are

adjust

the

errors

counted

the

errors

null

are

observed.

per

+V

APD

.

If

is

found, back

gating

(R50)

cycle

either

the errors

the

A

djust

the

.

Using a

clockwise

go to

zero,

adjustment

. Leave the adjustment set in this position. The optical

0

27 dBm.

OFF

or

o

4-18

Detection

adjustment

threshold

7.

This adjustment

Set

the optical

THRESHOLD

adjustment,

error

null setting.

is marked

power for

pot for

minimum errors

reduce the

THRESHOLD on

about 10-20

optical power

errors

.If

. The

the

printed

per

gating

the

errors

THRESHOLD

Servicing

cycle

go

to

the

Agilent

Performance

circuit

.

zero

is

optimum

card

A

djust

during

83446A/B

Tests

(R7).

the

the

at

the

Sensitivity

verication

8.

After

the

the

sensitivity

dBm

(Agilent

error

test

the

total

bit-error-ratio

+V

APD and

specication as

83446A) or

for Agilent

number

of

better

THRESHOLD adjustments

follows.

0

28

dBm (Agilent

83446A (40

of

errors does

than

minutes for

not exceed

0

1

2

10

10

Set the

83446B). Run

115.

with

95%

are complete

optical power

a

Agilent 83446B)

This

corresponds

condence

.

, verify

to

0

10

minute

and

27.0

verify

to

a

4-19

Servicing

the

Performance

Agilent

Tests

83446A/B

Test

Setup

Procedure

Test

The

2. Maximum

maximum

Sensitivity".

is

already

titled

or

1550

Set

be

detected.

1. Raise

properly

\Sensitivity"

nm

the

optical

the

adjust R78









2.

should

where

Change

T

ransmitter

Agilent

Agilent

V

erify

happen

the

83446A:

83446B:

that

measurement

operating

If

sensitivity

initialized.

in

transmitter

power

If

errors

power

(high input

rather

errors

wavelength

Errors

at

Errors

at

the

Sync

L

oss

to

the

opposite

without

occur

to

go

0

0

indicator

input

this

.

into

0

7.0

abruptly

to

8.68

8.68

adjusting

operating

power

testing

chapter

the

limit)

zero

dBm

dBm

Agilent

at

0

dBm.

,

in 5

in

is

OFF

has

If

not,

.

The

9

dBm

T

otal

clockwise

.

Leave

and

record

minutes

20

minutes

wavelength

R78.

input

test

requires

just

been

initialize

test

may

83446A/B

optical

errors

until

R78

the

(5

errors,

(5

errors,

transmitter

power

the

completed,

as

instructed

begin

at

0

9

power

,

may

be

the

errors

set

just

following:

max)

max)

and

same

setup

the

in

with

either

dBm.

No

adjust

R78

occurring.

reduce

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20

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Servicing

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Performance

83446A/B

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Test

setup

Procedure

Test

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in

have

initialize

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3. Electrical

electrical

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output

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procedure

signal

the

sensitivity

completed,

in

the

the

may

.

all

input

cables

.

Select

the

cables as

the

Agilent

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channels

0

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attenuation

optical

eye

power

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0.5

oscilloscope

Clock

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test

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reconnect

1

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into

.

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histogram procedure

signal

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be

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the

utility/cal

shown

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through

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2

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the

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the

channel

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amplitudes

test

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is

already

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operating

initialized.

same

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\Sensitivity".

with

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scope

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clock-out

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10,

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and

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.

Channel

vertical

with

turn

1310

test

a

vertical

pads

adapters

scale

to

0

15 dBm.

a

peak-peak

channel 1

peak-to-peak amplitude

(measure at

the sinusoidal

or

coax

to

4

should

setup

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power

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1550 nm

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.

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mean

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Vpp)

ON

(Agilent 83446A/B data out).

eye diagram should be displayed. Set the voltage histogram cursors near

the eye mid-point and measure the mean high and low levels

, and record:

Adata

4-21

Servicing

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Performance

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Data

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level mean

level

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4-22

Servicing

the

Agilent

Performance

83446A/B

Tests

T

est setup

Procedure

Test

4. Rear-panel

(functional

The rear-panel

in

\Test

1.

Sensitivity".

just

been completed,

If

not, initialize

1.

Remove

data

83446A/B

0.350

200

OFF

2.

Place

The

detector

verify

3.

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the

terminator

amplitude

ac power

the

output

rear-panel

Vpp

,

mV

at

.

The

front

the

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front-panel

should

that

the rear-panel

rear-panel

.

required

ON

check only)

input port

If

the

test

as

instructed

female

coax

50

cable

ohm

.

SMA

no

change

the

rear-panel

panel

in

Sync

83446A/B

sync

loss

be

showing

74

errors

maximum

slide

coax and

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for 6.6:1

.

input

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port

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test

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the

section

termination

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SMA

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through

the

data

high

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Loss indicator

rear-panel

indicator

no

should

current

occur

switch

to

the

reterminate the

pattern generator

extinction ratio

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the

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slide

switch

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errors

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for

a

period

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coax

position.

plug

data

.

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amplitude

same

setup

input

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properly

generator

into

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Set

the

data

.

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laser

transmitter

be

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.

to the

OFF

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the

the errors

of ve

minutes

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50

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the

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position.

error

to

zero

and

.

ohm

transmitter

4-23

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the

Performance

Agilent

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83446A/B

T

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equipment

Procedure

Test

5. Input

This test

test

equipment has

1.

Before

Connections

optical

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able

return

4-6.

Input

loss

Optical

Return

Loss

Agilent Product Description Quantity

8153A Lightwave multimeter 1each

81534A Return

81000AI Diamond

81000BR Reference

81000UM Universa

81554SM 1310/1550 nm

81101AC patchcord,

81109AC patchcord

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be

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each

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each

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each

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sure

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81109AC ber patchcord to the

OPTICAL OUTPUT

of the Agilent

81534A.

e. Connect the other end (HMS-10 Diamond) of the Agilent 81109A

patchcord to the Agilent 81000BR reference reector

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4-24

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:

:

the

Agilent

83446A/B

Performance

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:

:

:

:

:

:

:

:

:

::

:

:

:

:

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::

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:

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:

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ms

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Connect

the

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4-25

Replacement

What

you'll nd

This

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information

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recovery

contains

static-sensitive

in

Chapter

assembly

1

before removing

for the

following assemblies:

components

. Read

the electrostatic

any assemblies

.

4-26

Servicing

the

Agilent

83446A/B

Replacement Procedures

Replacing the

or

the RF

When

replacing the

torque

value.

photodetector

A

void

C

A

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bending

reinstalling

ends

of

any

cables

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tighten

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assemblies

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make semirigid

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connector

RF

cable

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T

able

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to

specied

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.

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removing

attached

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to

only

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connectors

disconnecting

removal

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tool

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assembly

assembly

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the

replaced

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to

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you

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the

should

connector

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risk

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return

ma

the

y

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the

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V

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Description T

ool Size

T

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Nut RF OUTPUT type-N connectors 1/2 inch 25 inch-pounds

SMA cable connections 5/16 inch 10 inch-pounds

PCB surface mount connectors Suhner tool 74Z-0-0-225

4-27

Servicing

the

Agilent

83446A/B

Replacement Procedures

Replacing the

The ac

cable harness

When replacing

power supply

Figure 4-4

cable assembly

.

the ac

.

Remove

and

T

able

ac cable

consists

cable assembly

the

line

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when

assembly

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the

line

,

unsolder

module

.

installing

module

Remove

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new

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the

the

connections

the

ac

cable

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line

assembly

switch,

switch.

to

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.

and

the

the

dc

to

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4-4. Wiring

diagram

for

the

line

module.

T

able

4-8.

Line

Module

Servicing

the

Agilent

83446A/B

Replacement Procedures

to

DC

P

ower

Supply

Connections

Index

Number

1 ac

2 ac power

3 dc

4 dc

5 dc

6 dc

7 dc

8 ac

9 ac

10 (T

(from

power

power

power supply

power

power

power

power

power

erminal

solder

Cable

the

harness

harness

supply

supply

supply

supply

harness

harness

Attachment

Line

Module)

(labeled

(labeled 4)

(labeled

(labeled

(labeled

lug)

bottom

5)

3)

2)

1)

of

rear-panel

Cable

Color

White/brown/gra

Gray

White

Y

ellow

Orange

Red

Blue

White/gra

y/red

White/gra

y

|

y

4-29

Servicing

the

Agilent

83446A/B

Replacement Procedures

Replacing the

Unsolder the

that attach

Table

4-9,

Adjust

Figure 4-5

and T

the

.

the power

5.2V

connections to

able

and

power supply

the

dc

power

supply to

4-8

when

12V

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the

chassis

installing

supplies

supply

.

a

new

to

Refer

the

.

Remove

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the

4-1

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four

,

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in

,

4-30

Figure

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Wiring

T

able 4-9.

Index

Number

1 E2

Diagram

DC P

for

ower Supply

Cable

A

ttachment

+OUT

the power

T

erminal

2 E20OUT

3 E1 +OUT red

4 E1 COM black

supply terminals.

Connections

Cable

Color

black

violet

Servicing

the

Agilent

83446A/B

Replacement Procedures

CA

Replacing the

1. Remove

the cable

photodetector/clock/data recovery

2. Use

U

T

I

O

N

These connectors

connector tool

the Huber

four coax

cable

PCDR assembly

assemblies

Suhner connector

assemblies

are

can

result

small

from

and

in

concealed

from

connectors

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tool

(refer

the

PCDR

delicate

.

F

damage

assembly

ailure

to

to

that

P1,

T

able

use

will

P2,

.

.

and

4-1

)

the

cause

P3

to

remove

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an

on

the

the

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unreliable

connection.

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Carefully

connector

4.

Remove

remove

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Install

6.

With

indicators

P

Sync

Rear-panel

the

ower

remove

on

the

eight

the

assembly

the

replacement

ac

power

.

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indicator

loss

indicator

the

should

input

the

optical

front

panel.

screws

.

switched

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(red)

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securing

PCDR

on,

indicate

:

:

:

ber

connector

Be

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the

assembly

check

as

:

:

:

:

:

:

:

:

::

:

:

:

:

(yellow)

not

PCDR

.

the

follows:

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::

:

:

:

:

:

:

:

:

:

:

:

from

to

assembly

three

:

:

:

:

:

:

:

:

:

:

kink

front

:

:

:

:

:

the

:

front

ange

the

optical

to

panel

:

:

:

:

:

:

:

:

:

:

:

:

::

:

:

the

:

:

:

:

chassis

LED

:

::

:

:

:

:

:

ber

:

:

:

:

:

:

.

and

:

:

:

:

:

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:

:

:

:

:

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7. Leave

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Rear-panel

the rear-panel

slide

slide

switch

switch

slide

to

to

switch

REAR

FRONT

in

:

the

::

::

:

::

FRONT

::

::

::

:

:

:

:

:

:

:

:

:

:

:

:

:

position

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:

:

:

:

:

:

:

:

:

:

:

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4-31

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4-32

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line

next

special

items

business

handing,

maximum

day

after

there

per

they

is

an additional

order).

are

ordered.

Hotline

hotline

orders

4-33

Servicing

Replaceable parts

the

Agilent

83446A/B

4-34

Figure

4-6.

Agilent

83446A/B

assembly

level

replaceable

parts.

T

able

4-10.

Assembly-Level

Replaceable

Servicing

Parts

the

Agilent

83446A/B

Replaceable parts

Index

Number

Agilent

Number

Part

1 5021-5814 REAR

2 CH834454A-CDR P

ANEL,

3 11982-00003 INSULA

4 CH834452A-CDR DECK

5 5021-5830 SIDE STRUT

6 83446-60005 Agilent

83446-69005 Agilent

83446-60012 Agilent

83446-69012 Agilent

7 1250-1811 RF

CONNEC

8 CH834453A-CDR FRONT

9 1990-1238 LED

85680-40004 LED

,

GREEN

MOUNT

10 5001-0538 TRIM,

11 5021-8413 FRONT

CH834451A-CDR FRONT

12 5041-8803 TRIM,

13 834456B-CDR CABLE,

14 834460A-CDR DC

CABLE

15 0950-2099 POWER SUPPL

16 11982-60002 AC

17 834458B-CDR CL

18 834457B-CDR CL

19 834459B-CDR LED

20 1990-0486 LED

21 1990-0487 LED

5041-8801 FOOT

1460-1345 TIL

CABLE

OCK

OCK

WIRE

,

RED

,YELL

,BO

T

ST

5041-8822 FOOT,BO

5062-3729 TOP COVER (NO

5062-3887 BOTTOM COVER (NO

5062-3805 SIDE COVER

2110-0202 FUSE

(NOT SHOWN)

0890-0732 SHRINK TUBING (NO

1400-0249 TY-RAP (NO

HWMWS-1-CDR OPTICAL FIBER CABLE

FRAME

REAR

TOR

83446A:

PHO

83446A:

EXCHANGE

83446B:

PHO

83446B:

EXCHANGE

T

OR,

TYPE

P

ANEL,

DRESS

(NO

T

SIDE

FRAME

P

ANEL,

SUB

T

OP

RF

ASSEMBL

Y

ASSEMBL

RECOVER

Y

RECOVER

Y

HARNESS

OW

TTOM

FRONT

ANDS FOR

TTOM REAR (NO

T SHOWN)

(NOT SHOWN)

T SHOWN)

T

ODETEC

PHO

T

ODETEC

PHO

N

SHOWN)

(NO

T

SHOWN)

Y

Y

(INCL

UDES THE

INPUT SELEC

INPUT

CABLE

(NO

T

FRONT FEET

T SHOWN)

T SHOWN)

T SHOWN)

CLAMPS

Description

T

OR/CL

OCK/DA

T

ODETEC

T

OR/CL

OCK/DA

T

ODETEC

T SWIT

SHOWN)

(NOT

T

A

T

OR/CL

TA

T

OR/CL

LINE SWIT

CH

CABLE

SHOWN)

RECOVER

OCK/DA

RECOVERY

OCK/DA

CH

AND

ASSY

Y

ASSY

T

A

RECOVERY

ASSY

TA

RECOVER

LINE

ASSY

Y

ASSY

MODULE)

4-35

Servicing

the

Agilent

Replaceable parts

83446A/B

4-36

Figure

4-7.

Agilent

83446A/B

replaceable

hardware.