Agilent 70810B User Manual

HP 70810B

Lightwave Section

(includes Option 850)

User's Guide

ABCDE

A

Printed

in US

HP part number: 70810-90067

Printed in USA June 1994

First Edition

This manual and any examples contained herein are provided \as is"

and are 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 of merchantability and tness

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.

Note

This instrument

Publication

IEC

and

Apparatus

,

documentation

the

followed

instrument

by

in

has

348,

has

contains

user

safe

a

designed

been

equirements

Safety

R

been supplied

information

to

ensure

safe operation

condition.

tested

and

for

safe

in a

warnings which

and

accordance

in

Electronic

condition.

to

and

Measuring

instruction

The

must be

maintain

with

the

c

Copyright



Rights

All

written

prior

copyright

Hewlett-P

Reserved.

permission

laws.

ackard

Company

Reproduction,

prohibited,

is

1991,

adaptation,

except

1994

or

allowed

as

translation

under

without

the

Safety Notes

Warning

Caution

No operator-serviceable parts inside. Refer servicing to

qualied personnel. To prevent electrical shock, do not remove

covers.

For continued protection against re hazard, replace line fuse

only with same type and ratings (type 6.3A/250V). The use of

other fuses or materials is prohibited.

This is a Safety Class 1 Product (provided with a protective

earthing ground incorporated in the power cord.) The mains

plug shall only be inserted in a socket outlet provided with a

protective earth contact. Any interruption of the protective

conductor inside or outside of the instrument is likely to

make the instrument dangerous. Intentional interruption is

prohibited.

If this instrument is not used as specied, the protection

provided by the equipment could be impaired. This instrument

by

for

this

not

II

and

must be

used in

protection

Always use

instrument.

this

using

instrument

This

ollution

P

Degree

normal

a

intact)

are

the three-prong

ailure to

F

cause

may

cord

designed

is

per

2

condition

.

only

A

ensure

instrument

for

1010

IEC

power

C

adequate

in

use

and

which

(in

supplied

cord

earth

damage

Installation

respectively

664

means

all

with

grounding

.

Category

.

entilation

V

cabinet,

restricted.

than

less



4

by

power

for

C

dissipated

Requirements:

convection

the

ambient

The

maximum

the

every

100

in

watts

the

When

and

into

temperature

operating

dissipated

cabinet

forced convection must be used.

installing

the

of

out

(outside

temperature

in

greater

is

instrument

the

instrument

the

of

cabinet.

the

800

than

must

cabinet)

instrument

the

If

watts

the

,

in

not

must

total

then

a

be

be

iii

Using the HP 70810B Lightwave Section

This user's guide provides installation, troubleshooting, operation, and

programming details for a lightwave section that has been congured

as an independent element (stand-alone operation).

An HP 70810B lightwave section can also be congured for operation

as a slave element in a modular lightwave signal analyzer.When

congured as a slave element, a lightwave section is part of an HP

71400C or HP 71401C lightwave signal analyzer.For system-level

conguration information, refer to the

Analyzer Installation and Verication Manual

local-oscillator-controlled modules.

An HP 70810A lightwave section cannot be congured as a slave

element.

HP 70000 Modular Spectrum

for HP 70900B

iv

Assistance

Product maintenance agreements and other customer assistance

agreements are available for Hewlett-Packard products.For any

assistance, contact your nearest Hewlett-Packard sales and service

oce.

Certication

Hewlett-Packard Company certies that this product met its

published specications at the time of shipment from the factory.

Hewlett-Packard further certies that its calibration measurements

are traceable to the United States National Institute of Standards and

Technology, to the extent allowed by the Institute's calibration facility,

and to the calibration facilities of other International Standards

Organization members.

v

Warranty

This Hewlett-Packard instrument product is warranted against defects

in material and workmanship for a period of one year from date of

shipment. During the warranty period, Hewlett-Packard Company

will, at its option, either repair or replace products which prove to be

defective.

For warranty service or repair, this product must be returned to a

service facility designated by Hewlett-Packard. Buyer shall prepay

shipping charges to Hewlett-Packard and Hewlett-Packard shall pay

shipping charges to return the product to Buyer. However, Buyer shall

pay all shipping charges, duties, and taxes for products returned to

Hewlett-Packard from another country.

Hewlett-Packard warrants that its software and rmware designated

by Hewlett-Packard for use with an instrument will execute

its programming instructions when properly installed on that

instrument. Hewlett-Packard does not warrant that the operation

of the instrument, or software, or rmware will be uninterrupted or

error-free.

arranty

W

of

tion

a

Limit

misuse

the

for

.

.

IMPLIED

FOR

NOT

from

AND

foregoing

The

improper

software

operation

product,

OTHER

NO

HEWLETT-P

ARRANTIES

W

ARTICULAR

P

clusive

Ex

REMEDIES

THE

EXCLUSIVE

LIABLE

warranty

inadequate

or

interfacing,

or

the

outside

or

of

improper site

WARRANTY

CKARD SPECIFICALL

A

OF MERCHANT

PURPOSE.

Remedies

VIDED

PRO

REMEDIES.

DIRECT

ANY

FOR

apply

not

shall

maintenance

unauthorized

environmental

preparation

EXPRESSED

IS

Y

ABILITY

HEREIN

HEWLETT-P

INDIRECT

,

defects

to

,

Buyer

by

modication

specications

maintenance

or

IMPLIED

OR

DISCLAIMS

FITNESS

AND

BUYER'S

ARE

CKARD

A

SPECIAL,

,

resulting

Buyer-supplied

or

THE

SOLE

SHALL

INCIDENT

CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT,

TORT, OR ANY OTHER LEGAL THEORY.

,

A

BE

AL,

OR

vi

Instrument Markings

arnings

W

The instruction documentation symbol. The product

L

is marked with this symbol when it is necessary

for the user to refer to the instructions in the

documentation.

\CE" The CE mark is a registered trademark of the

European Community. (If accompanied by a year,itis

when the design was proven.)

\ISM1-A" This is a symbol of an Industrial Scientic and Medical

Group 1 Class A product.

\CSA" The CSA mark is a registered trademark of the

Canadian Standards Association.

Caution

arning

W

Key Conventions

Caution

not

destruction

until

arning

W

not

if

or

indicated

4

Front-panel key

denotes

correctly

indicated

the

correctly

of

loss

performed

of

denotes

life

conditions

5

NNNNNNNNNNNNNNNNNNNNNNN

Softkey

Input Text

Message Text

hazard.

a

instrument.

the

conditions

hazard.

a

performed

not

Do

.

It

adhered

or

proceed

fully

are

attention

calls

not

Do

fully

are

calls

It

adhered

or

beyond

understood

could

,

to

proceed

understood

attention

,

to

warning

a

a procedure

to

in

result

beyond

and

a

to

result

could

met.

and

procedure

note until

that, if

damage to

caution

a

met.

injury

in

Text shown like this represents a key physically

located on the spectrum analyzer.

Text shown like this represents a softkey.(The

softkeys are located next to the softkey labels,and

the right

the

left

softkey

of

side

labels

the

the

are

spectrum

annotation

analyzer

on

display

.)

Text printed in this typeface indicates text you

via the keypad or using programming commands

Text printed

in this typeface indicates text displayed

on the instrument's screen.

or

note

that,

the

or

enter

.

vii

What You'll Find in This Manual

Chapter 1

Chapter 2

Chapter 3

Chapter 4

Chapter 5

Chapter 6

Chapter

Chapter

\Getting Started," describes the HP 70810B lightwave

section and shows you how to install it.

\System Verication," shows you how to verify basic

lightwave section functions.

\Operating," describes how to operate a lightwave

section that has been congured for stand-alone

operation.

\Programming," describes how to operate a lightwave

section by remote computer control.

\Specications and Characteristics," contains the

module specications for the HP 70180B and HP

70810B Option 850 lightwave sections, and any

required regulatory information.

\Menu Maps," illustrates the display menu

lightwave

the

Reference

and

.

and

,

HP

an

section

for

front-

and

Commands

functions

70810B

as

,"

rear-panel

or

stand-alone

a

organization

7

\Dictionary

softkeys

connectors

8

\Programming

parameters

operate

lightwave

section

contains

describes

,"

the

of

70810B

HP

softkeys

description of

a

features

the

commands

Option

lightwave

.

and

syntax,

used

850

receiver

to

.

Chapter

9

Chapter 10

Chapter 11

\Error

Messages

troubleshooting

70810B

HP

congured

\Tables

you

tells

Option 850

for

and Charts

how to

provides

,"

information

stand-alone operation.

," lists

contact an

module-level

for an

HP 70810B

lightwave section

accessories

options

and

HP sales

and

when

service

or

it

oce.

\Conguring and Addressing," explains how to

address one or more HP 70810B lightwave sections

for stand-alone operation and provides general

addressing

systems

.

information

for modular

measurement

is

and

viii

Contents

1. Getting Started

What You'll Find in This Chapter ........... 1-1

Introducing the Lightwave Section . . . . . . . . . . . 1-2

Lightwave Section Serial Numbers . . . . . . . . . . 1-3

Installing the Lightwave Section for Stand-Alone

Operation.. ...... ........ ..... 1-4

To install the HP 70810B module .......... 1-5

To remove the HP 70810B module . . . . . . . . . . 1-6

Changing Measurement Parameters with an HP 71400C or

HP 71401C ...... ........ ...... 1-7

.

.

.

.

.

.

.

.

.

.

.

Optical

Caring

for

Cleaning Optical

Reducing Electrostatic

PC

T

Board

est

Assemblies and

Equipment .

Static-Safe

our

return

erication

V

ou'll

Y

Basic

verify

Y

Kit

the

a

Find

basic

2.

Servicing

Service

Returning

o

T

System

What

erifying

V

o

T

Connectors

Connectors .

..

ccessories .

A

Module

.

.

.

.

in

for

for

This

Module

module

Functions

functionality

Discharge (ESD)

.

Using the

.

Chapter

.

.

.

..

..

Damage .

Electronic Components

.

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..

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Service

service

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71000

HP

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..

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System

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1-8

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1-8

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1-9

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1-9

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1-10

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1-10

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1-11

.

1-12

.

1-12

.

2-1

.

2-2

.

2-2

.

70810B Lightwa

HP

e

v

Section

User's

Guide

3. Operating

What You'll Find in This Chapter ........... 3-1

An Overview of Operation .......... .... 3-2

Calibration . . . . . . . . . . . . . . . . . . . . . 3-2

Display Annotation . . . . . . . . . . . . . . . . . 3-3

Keys

Display

Overview

An

Using

Front-P

the

anel

of

Front

Softkeys

anel

P

Front-Panel and Rear-P

Front-Panel LEDs . . . . . . . . . .

Connectors and Latches . . . . . . . . . . . .

Cleaning Connections for A

To clean a dry connector

.

.

.

..

.

.

.

..

Data

Enter

to

eatures . . . . .

anel F

ccurate Measurements

...

...... .....

.

.

.

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.

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.

.

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.

.

.

.

.....

........

...

.. 3-9

.

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..

.

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.

.

To clean a wet connector ...... ...... .. 3-10

To apply index-matching compound ......... 3-10

3-5

.

3-6

.

3-6

.

3-7

3-7

3-8

3-9

Contents-1

4. Programming

What You'll Find in This Chapter ........... 4-1

Getting Set Up for Remote Operation ...... ... 4-2

Communicating with the Lightwave Section ...... 4-3

Executing Remote Commands . . . . . . . . . . . . 4-3

Syntax Requirements . . . . . . . . . . . . . . . 4-4

Local and Remote Control . . . . . . . . . . . . . 4-4

Initial Program Considerations . . . . . . . . . . . . 4-5

Transferring Data to the Computer .......... 4-6

Requesting and Receiving Data .......... . 4-6

Monitoring System Operation ........ ..... 4-8

Interrupt Process . . . . . . . . . . . . . . . . . . 4-8

Lightwave Section Status Byte .......... 4-9

The Service-Request Mask . . . . . . . . . . . . . 4-9

Service-Request Examples . . . . . . . . . . . . . . 4-10

Monitoring System Operation without Using Service

Requests .................... 4-11

5. Specications and Characteristics

What You'll Find in This Chapter ........... 5-1

.

.

.

.

..

..

..

..

.

.

.

Conguration

70810B

HP

70810B

HP

Module

Lightwave

RF

RF

HSWP

Module

Option

Input

Input

Output

In/Out .

Modes

and

Input

.

.

.

.

.

Specications

Module

850

Output

.

.

.

.

.

.

.

.

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.

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.

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.

.

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.

Specications

Characteristics

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5-2

.

5-3

.

5-6

.

5-10

.

5-10

5-10

.

5-10

.

5-10

.

Menu Maps

6.

.

.

.

.

.

.

.

.

.

Chapter

Find in

You'll

What

Dictionary

7.

What

Alphabetical

8. Programming Commands

What You'll Find in This Chapter ........... 8-1

Syntax Conventions ................. 8-2

Pictorial Notation . . . . . . . . . . . . . . . . . . 8-2

ext Notation

T

Command

Syntax

QueryResponses .............

Common Command P

AUNITS

CAL

CALCOR

DONE

ERR

.

HD

.

ID

IP

LTWAVE

MSG

Reference

Find

ou'll

Y

Listing

Sequence .

Summary

.................

..................

...........

......................... 8-13

......................... 8-14

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This

Chapter

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in

Softkeys

of

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and Latches

Connectors

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6-1

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7-1

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7-2

8-2

.

8-2

.

8-3

.

8-4

8-5

8-10

8-11

8-12

8-15

.

8-16

.

8-17

.

8-18

.

8-19

.

Contents-2

HP 70810B

Lightwa

e

v

Section

User's

Guide

OPTATN

OPTCOR

OPTPWR

REV

RQS

RSPSVTY

SER

SRQ

STB

TEST

USERMSG

XERR

ZERO

9. Error Messages

What You'll Find in This Chapter ........... 9-1

Troubleshooting Features ............... 9-2

Display Status Indicators .. ........ .... 9-2

Lightwave Section Status Indicators . . . . . . . . . 9-2

Catastrophic

Troubleshooting

Error

Operating

Computation Errors 4000 to 4999 ...... .... 9-8

Hardware W

Hardware-Broken Errors 7000 to 7999 . . . . . . . .

actory-Use

F

.... ........ ...... ..... 8-21

.... ........ ...... ..... 8-22

.... ........ ...... ..... 8-24

..... ....... ...... ....... 8-25

..... ....... ...... ....... 8-26

.... ........ ...... ..... 8-28

..... ....... ...... ....... 8-29

..... ....... ...... ....... 8-30

..... ....... ...... ....... 8-32

..... ....... ...... ....... 8-34

.... ........ ...... ..... 8-35

..... ....... ...... ....... 8-36

..... ....... ...... ....... 8-38

Status Error Indicators .............. 9-2

.

.

.

.

.

..

..

..

..

.

.

Indicators

ctive

A

ailures

F

Message

2001

2003

2006

2011

2018

2023

2031

2032

2035

2802

2803 Illegal in bypass

4000 Divide by zero

4001 Float overflow

4002 Float underflow

4003

4004

4005

6802 Invalid cal data

6805 Firmware changed

6806 Avg pwr over-range

7801 Optical atten failed

7802 ADC error

7803

7804

7805

Descriptions

Errors

Illegal

Missing

Parm out

Memory overflow

State protected

Illegal Cal

Too many

Hardware

Illegal

Illegal

Logarithm error

Integer overflow

Square root

arning Errors 6000 to 6999

Power

Self

Zeroing

Only

.

.

Lightwave

a

2000

command

parameter

of

errors

not

operation

in

meter

failed

test

error

Errors

.

.

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.

..

..

..

..

.

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.

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.

Section

.

.

2999

to

.

range

.

.

signal

.

present

mode

LW

.............. 9-8

...... ....... 9-8

...... ....... 9-8

.

error

................ 9-9

failed

.

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to

9000

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............ 9-8

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.......

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.......... 9-9

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9999

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9-3

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9-4

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9-5

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. 9-6

. 9-6

9-6

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9-6

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9-7

.

9-7

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9-7

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9-7

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9-7

.

9-7

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9-7

9-8

.

9-8

.

9-8

9-8

9-8

9-8

9-9

9-9

9-9

9-9

.

9-9

.

9-9

.

9-10

70810B Lightwa

HP

e

v

Section

User's

Guide

Contents-3

10. Tables and Charts

What You'll Find in This Chapter ........... 10-1

Instrument Options . . . . . . . . . . . . . . . . . . 10-2

Accessories Supplied with the Product . . . . . . . . 10-2

Service Kit Accessories .. ...... ........ 10-3

Contacting HP Sales and Service Oces ........ 10-4

11. Conguring and Addressing

What You'll Find in This Chapter ........... 11-1

HP-MSIB and HP-IB Addressing ............ 11-2

Modular Measurement System Terminology . . . . . . . 11-3

Functional Terms.................. 11-3

Structural Terms .................. 11-3

Address Matrix . . . . . . . . . . . . . . . . . . . . 11-4

HP-IB Access Area ................. 11-4

Display-Response Area ............... 11-4

Display Communication Capabilities ......... 11-5

Address Switches . . . . . . . . . . . . . . . . . . . 11-6

HP 70810B Address Switches ............ 11-6

Soft-Set HP-IB Addresses .... ........ .. 11-6

Default

ddress

A

A

Map

ddress

for

.

Stand-Alone

Operation

..

..

..

.

.

.

.

..

..

..

..

.

.

Index

.

.

.

..

11-6

11-8

Contents-4

HP 70810B

Lightwa

e

v

Section

User's

Guide

Figures

ables

T

1-1. Typical Serial Number Label ............ 1-3

1-2. Module Removal/Replacement . . . . . . . . . . . . 1-5

1-3. HP 70810B Address Switch Position for Stand-Alone

Operation.................... 1-6

1-4. Static-Safe Workstation ............... 1-9

2-1. Initial Operation Test Equipment Setup ....... 2-2

2-2. Average Power Display from an HP 70810B in

Stand-Alone Operation ............. 2-3

2-3. Spectrum Analyzer Display of Modulation Spectrum . 2-4

3-1. Display Annotation for Stand-Alone Operation .. .. 3-3

3-2. HP 70810B Front Panel and Rear Panel ....... 3-7

.

.

.

6-1. Softkey

8-1. Numeric

8-2. Binary

11-1. The

A

11-2. Typical

ddress

A

11-3.

Menu Map

Value

State

ddress

70810B

HP

Map

Query

Query

Matrix

Multiple

for

Stand-Alone

for

Response

Response

.

.

.

ddress

A

Lightwave

.

.

Switch

.

.

.

.

.

Operation

.

.

.

.

.

.

.

.

.

.

.

Sections

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

..

6-2

8-4

8-4

11-4

11-7

11-8

70810B Lightwa

HP

e

v

Section

User's

Guide

1-10

.

.

.

.

.

.

.

..

..

.

.

.

Data

Status

.

Byte

.

..

..

..

.

..

..

..

..

.

.

.

..

.

.

4-10

.

.

1-1.

4-1.

4-2.

Static-Safe

for

Units

Lightwave

ccessories

A

Returned

Section

5-1. HP 70810B Specications and Characteristics (1 of 2) . 5-4

5-1. HP 70810B Specications and Characteristics (2 of 2) . 5-5

5-2. HP 70810B Option 850 Specications and

Characteristics (1 of 2) . . . . . . . . . . . . . . 5-7

5-2. HP 70810B Option 850 Specications and

Characteristics (2

5-3.

HP

70810B

and

Specications

8-1. Commands by Functional Group . . . . . . . .

8-2. Alphabetical Command Summary

of

70810B

HP

Characteristics

and

Option

General

850

..

.

.

.

.

.

...

..........

.

.

.

.

.

..

.

.

.

.

.

.

.

.

2)

8-3. Programming Commands Executed or Aected by

Instrument Preset . . . . . . .

8-4. Lightwave Section Status Byte

.........

.....

......

8-17

8-27

8-5. Lightwave Section Status Byte ...... ..... 8-31

8-6. Lightwave Section Status Byte ...... ..... 8-33

10-2

.

.

..

.

.

Number

art

.

.

.

Oces

.

10-3

.

.

.

.

.

.

.

10-5

.

.

.

.

.

.

10-1.

10-2.

10-3.

ccessories

A

71000

HP

71000-60002)

Hewlett-P

Shipped

System

ackard

with

Service

.

.

Sales

.

and

the

Kit

.

.

Service

HP

(HP

.

70810B

P

.

.

Contents-5

4-6

5-8

5-9

8-7

8-8

11-1. Decimal Equivalent of Binary Address . . . . . . . . 11-4

Contents-6

HP 70810B

Lightwa

e

v

Section

User's

Guide

Getting Started

This chapter describes the HP 70810B lightwave section and shows

you how to install it.

What You'll Find in This Chapter

1

Note

Introducing the Lightwave Sections

:::::::::::::::::::::::::

page 1-2

Installing the Lightwave Section for Stand-Alone Operation page 1-4

HP

Changing

71401C

Caring

Reducing

Servicing

Returning

Measurement

:

:

:

Optical

for

Electrostatic

our

Y

the

When operated

HP

requires

an

:

:

:

:

Module

as a

70900B

P

::

:

:

:

:

:

:

:

:

:

Connectors

Discharge (ESD)

Module

Using the

for

slave element,

local

arameters

:

:

:

::

::

::

:

:

:

HP

Service

the

oscillator

an

with

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

Damage

71000

:

:

:

:

:

:

:

:

:

70810B

HP

module with

HP

:

:

:

:

:

::

:

:

:

Service

:

:

:

:

:

71400C

::

::

:

::

:

:

:

lightwave

or

page

:

:

:

:

:

:

::

::

page

:

:

:

:

:

:

:

:

:

:

:

page

:

:

:

:

:

:

:

:

:

:

:

page

:

:

:

:

Kit

page

::

:

:

:

:

:

:

:

:

section

rmware date

code 911021 or later for proper operation.

1-7

1-8

1-9

1-11

1-12

70810B Lightwa

HP

e

v

Section

User's

Guide

Getting

Started

1-1

Introducing the Lightwave Section

HP 70810B and HP 70810B Option 850 lightwave sections are

1/8-width modules designed to work in an HP 70000 modular

measurement system mainframe. They both have Hewlett-Packard

Interface Bus (HP-IB) and Hewlett-Packard Modular System Interface

Bus (HP-MSIB) communication capabilities. Either lightwave section

can function in the following congurations:

As a stand-alone instrument that will measure average optical

power and provide an amplied electrical signal output

corresponding to the intensity-modulated signal level.

As a lightwave signal analyzer with a 22 GHz modulation bandwidth

capability and calibrated system response (HP 71400C lightwave

signal analyzer system).

As a lightwave signal analyzer with a 2.9 GHz modulation

bandwidth capability and calibrated system response (HP 71401C

lightwave signal analyzer).

70810B

HP

The

measurement

for an

kHz to

Option

22

dBm/pHz

lightwave

range

850)

with

GHz

Lightwave

.

communication capability

a module-control

module capability

1200

of

detected

a

and

input

an

section

,

processor

.

section

nm

noise

features

optical

that

provides

1600

to

modulation

equivalent

electrical

and

provides

a

(750

nm

include

either

wavelength

to

nm

bandwidth

HP-IB

input

slave

of

and

connectors

or

power

nm

870

100

of

64

0

HP-MSIB

stand-alone

,

and

modular

a

Typically,

electrical

71100C

HP

congured

analyzer

signal

modulation

optical

ber

HP

the

spectrum

spectrum

RF

an

with

The

.

present

The

.

70810B

analyzer

analyzer

70810B

HP

lightwave

lightwave

a

on

displayed

RF

as

such

An

.

lightwave

system

the

an

electrical

detects

signal

HP

section

transmitted on

precedes

,

intensity-modulation

section

in

71210C microwave

spectrum analyzer

a lightwave

is

displays intensity

and

single-mode

incorporates

or

frequency-response calibration corrections that compensate for

photodetector responsivity and preamplier gain variations.The

factory determines responsivity values for 1300 nm and 1550 nm

wavelengths (850 nm for an Option 850). The user can select one

of these values or calibrate the lightwave section to some other

reference

Basically

photodetector, microwave preamplier

.

the

HP

70810B

consists

of

optical

attenuator

, and optical power meter

, broadband

. The

lter-wheel attenuator provides up to 30 dB of optical attenuation

programmed in 1 dB steps

PIN photodetector

, which detects the modulation and

. A lens focuses the light onto a high-speed

converts

optical power to electrical current (photons to electrons). One path

for the detected current drives the high-gain, low noise, four-stage

preamplier, which consists of four traveling-wave GaAs MMICs

(gallium-arsenide microwave-monolithic integrated circuit).

gain

dB

with

32

second

A

a

path

transimpedance

lightwave

The

an

and

monitors

8

dB

the

section

gure

noise

detected

preamplier

100

from

current's

DC

typically

22

to

kHz

component

provides

GHz.

an

Getting Started

1-2

HP

70810B

Lightwa

e

v

Section

User's

Guide

circuit, which determines a value representing average optical power.

The average power value appears on the display as both a real-time

vertical power bar and a digital power readout.

In a stand-alone conguration, the lightwave section functions as an

optical detector and average power meter. When lightwave mode

is selected, the lightwave section produces an electrical output that

is the amplied, uncorrected, detected intensity modulation of a

modulated optical input signal. The lightwave section also has an

RF input for conventional RF signal inputs. When RF bypass mode

is selected, the RF input is connected directly to the RF output,

bypassing the preamplier and all optical hardware. A spectrum

analyzer or other electrical measurement instrument must be

connected to the RF output to make use of the electrical output signal

produced in either lightwave or RF bypass mode.

An important feature of the HP 70810B is its versatile input connector

system. A variety of screw-on optical connector interface options are

now available,suchas:

Diamond HMS-10/HP

FC/PC

47256

DIN

Biconic

ST

optical

are

cords

atch

P

connector

Hewlett-P

latest

systems

ackard

lightwave measurement

also

,

sales

available

as

such

and

that

Radiall.

the

service

accessories

accommodate

Contact

for

oce

.

other

local

your

information

about

the

Lightwave

Section

Serial

Numbers

the

and

sux.

to

the

which

two-part

A

frame

front

letter are

Figure 1-1

serial number

of the

the serial

lightwave section.

number prex;

.) Identical

appears on

the

The

the last

lightwave sections

label

mylar

four

rst

digits

ve

have the

attached

digits

the

,

same

prex,

changes only for signicant modication. The sux is dierent for

each lightwave section.

Figure 1-1. Typical Serial Number Label

(See

70810B Lightwa

HP

e

v

Section

User's

Guide

Getting

Started

1-3

Installing the Lightwave Section for Stand-Alone Operation

This section tells you how to install the HP 70810B lightwave section

in an HP 70000 modular measurement system mainframe. When

the HP 70810B is shipped as part of an HP 71400C or HP 71401C

lightwave signal analyzer, the factory addresses and interconnects

all system components. Refer to the

Analyzer Installation and Verication Manual for HP 70900B

Local-Oscillator Controlled Modules

Any future shipment of the instrument requires the original packing

materials or their equivalents.For detailed packing and shipping

information, refer to \Returning the Module for Service" in this

chapter.

HP 70000 Modular Spectrum

for system-level information.

Getting Started

1-4

HP

70810B

Lightwa

e

v

Section

User's

Guide

To install the HP 70810B module

1. Inspect the shipping container or cushioning material for damage.

If there is damage or a defect, save the packing materials,lea

claim with the carrier, then contact the nearest Hewlett-Packard

sales and service oce for immediate repair or replacement.

2. Set the mainframe LINE switch to OFF, then swing down the front

door. See Figure 1-2.

Note

The lightwave section row address must be set to zero for stand-alone

operation. The column address can be set to any value greater than

the column address of the display. The highest column address that

can be used is 30. A default column address of 20 is used throughout

this manual.

When the HP 70810B is part of a system, the default row address is 3

and the default column address is 20.

Figure

1-2.

Module

Removal/Replacement

70810B Lightwa

HP

e

v

Note

Note

Section

User's

column

3.

Set

the

lightwave

section

HP-MSIB

address

to

Refer to Figure 1-3 for the correct address switch position.

The four-section switch at the top of Figure 1-3 has no eect on

stand-alone operation.

Set

4.

5. Slide

the

the

HP-IB

switch to

lightwave

ON

section

stand-alone

for

the

into

mainframe

operation.

push

,

front panel, and tighten the module latch using the 8 mm hex-ball

driver.

Stand-alone operation does not require an external cable connection

at rear-panel HSWP

Guide

connector.

Getting

20,

rmly

row

on

Started

0.

the

1-5

Figure 1-3.

HP 70810B Address Switch Position for Stand-Alone Operation

ON.

power

to

indicator

the

that

and

on

is

Set the

6.

Verify

7.

ventilation

mainframe LINE

that the

mainframe

fan is

working.

switch

After

8.

section

the

If

power-up

lightwave

Press

a.

the

b.

Press

selected

c. Press the

stand-alone operation of the lightwave section.

9. Refer to Chapter 2 to verify operation of the lightwave section.

During a normal power-on sequence, a self-test routine causes

various

the

70810B

ERR

description

To remove the HP 70810B module

1. Set the instrument LINE switch to OFF

attached to the high-sweep connector on the rear panel, remove it.

lightwave

the

ready

is

lightwave

the

main

the

lightwave

LED

of

for

the

,

section.

4

DISPLA

menu

N

N

N

NEXT

for

4

MENU

remains

displayed

the

appeared, the

have

softkeys

probably

perform

it,

display

the

.

until

operation.

turn

to

test, refer

the

messages

.

on

do

is

the

front

the

not

not

and

.

window

assign

o

key

5

Y

the

N

N

N

N

N

N

N

N

N

softkeys

menu

on

display

N

N

N

N

N

N

N

softkey

section

use

section

display

for

N

N

N

N

NN

NN

N

N

N

N

T

N

INSTR

independent

5

key to display the seven softkeys for

on

LEDs

after

section

error

. If a coaxial cable is

appear

assigned

following

panel

lightwave

If

o.

Chapter

to

lightwave

after

to the

steps:

access

to

section

HP

the

for

9

is

a

Getting Started

1-6

2. Swing down the front door, then use the 8 mm hex-ball driver to

loosen the module latch.

HP

.

70810B

Lightwa

e

v

Section

User's

3.

Slide

the

module

out

of

mainframe

the

Guide

Changing Measurement Parameters with an HP 71400C or HP 71401C

Use the front-panel knob, step keys, or numeric keypad to enter

new measurements settings.For example, press the

NNNNNNNNNNNNNNNN

N

ATTEN

softkey

to change the optical input attenuation. After changing the setting,

pressing the

another function is selected. Pressing the

4

HOLD

5

key disables the keypad, knob, and step keys until

4

5

key twice blanks the

HOLD

right-side softkeys.

Use the

45

(backspace) key to speed your navigation through softkey

menus. When pressed, the previous softkey menu is displayed. Also,

use this key to backspace over numbers entered using the data-entry

keypad.

70810B Lightwa

HP

e

v

Section

User's

Guide

HP 71400C/HP 71401C

Getting

Started

1-7

Caring for Optical Connectors

Warning

Caution

To avoid the possibility of damage to your eyes, verify a disabled

output at the light source before any cleaning, connecting, or

disconnecting of optical system components.

The HP 70810B options include various optical input connector

interfaces. Also available are patch cords that accommodate

additional optical connector systems. The connectors and patch cords

screw on nger-tight to the lightwave section front-panel optical

input tting. An optical cable from the light source attaches to the

connector interface or patch cord.

Both the lightwave section front-panel tting and the source cable

have a protruding ber-optic tip. In the center of this tip is the actual

glass ber. Lightwave measurements demand precision mating of

awless ber ends. Thus the delicate glass ber requires protection

from mechanical damage, ngerprints, and obstructions.

assure

help

following

The

accurate

Exposed

object to

light

ber-optic

touch

important when

and breaking

Never insert

may cause

precautions

measurements

tips

unprotected

an

installing

connections

cleaning

any

damage

that

help

.

easily

are

connector

a

.

tool

can

prevent

tip

into

aect

ber

scratched.

precaution

This

.

interface

optical

an

optical

the

damage

and

allow

not

Do

is

when

and

connector

system.

any

particularly

making

ferrule;

this

Cleaning

Optical

Connectors

Refer to \Cleaning Connections for A

Chapter 3 for optical connector cleaning information.

not

Do

cleaning

Before

alcohol

touch

with

any

and

exposed

an

cleaning

mating

cotton

a

solution.

ber-optic

of

swab

ber-optic

tips

.

tip

clean

,

An oily

.

ngerprint requires

the tips

with isopropyl

Clean more thoroughly with cleaning solution if measurements

reveal a slightly lower than expected power level or an increase in

reections or intensity noise.

Always replace the protector caps on any exposed ber-optic tip.

ccurate Measurements" in

Getting Started

1-8

HP

70810B

Lightwa

e

v

Section

User's

Guide

Reducing Electrostatic Discharge (ESD) Damage

Caution

ESD can damage or destroy electronic components.Work at static-safe

workstations when servicing assemblies consisting of electronic

components.

Figure 1-4 shows an example of a static-safe workstation with

two combinations of ESD protection: conductive table mat with

wrist strap; conductive oor mat with heel strap. Use these two

combinations together. The \Static-Safe Accessories" section provides

lists of accessories.

test

1-4.

and

help

service

following

The

during

Figure

suggestions

instrument

PC Board Assemblies and Electronic Components

Work at a static-safe workstation.

static-shielding

Store

not

Do

or transport

erasers

use

in

to

clean

generate static electricity and remove gold plating. Clean with

lint-free cloth and a solution of 80% electronics-grade isopropyl

alcohol and 20% deionized water

Static-Safe

reduce

ESD

.

containers

connector

edge

.

orkstation

W

damage

contacts

.

can

that

. Erasers

occur

70810B Lightwa

HP

e

v

Section

User's

Guide

Getting

Started

1-9

Test Equipment

Static-Safe Accessories

Before connecting any coaxial cable to an instrument for the rst

time each day, momentarily short together the center and outer

conductors of the cable.

Before touching the center pin of any connector, make sure you are

using a grounded, resistor-isolated, wrist strap.

To prevent buildup of static charge, make sure all instruments are

properly earth-grounded.

Table 1-1 lists static-safe accessories that you can order through any

Hewlett-Packard sales and service oce.

Table 1-1. Static-Safe Accessories

HP Part

Description

Number

9300-0797 Set includes: 3M static control mat 0.6 m21.2 m (2 ft

2

4 ft) and 4.6 cm (15 ft) ground wire. (The wrist-strap

must be

they

9300-0980

wrist-strap

and

ordered

separately

Wrist-strap cord

cord

.)

1.5

are

m

not

(5

included;

ft)

9300-1383

9300-1169

Wrist-strap

adjustable

four

has

connection.

heel-strap

ESD

color

,

black,

links

(reusable

stainless

a

and

12

to

6

steel, without

post-type

mm

7

months).

cord,

1-10

Getting Started

HP

70810B

Lightwa

e

v

Section

User's

Guide

Servicing Your Module Using the HP 71000 System Service Kit

The HP 71000 system service kit (HP part number 71000-60002)

is the general service kit for HP 70000 Series modules. This kit

includes servicing tools required to repair all HP 70000 Series modules

and also a modication procedure for the HP 70001A mainframe.

The modication allows access to HP 70000 Series modules during

bench testing and repair. Refer to the latest version of service note

71000A-1 for a full listing of the HP 71000 system service kit contents.

70810B Lightwa

HP

e

v

Section

User's

Guide

Getting

Started

1-11

Returning the Module for Service

Repackaging a module requires the original shipping containers and

materials or their equivalents. Hewlett-Packard oces can provide

packaging materials identical to the original materials. Refer to

Chapter 10 for the Hewlett-Packard sales and service oce nearest

you.

Caution

Packaging materials not specied can result in instrument damage.

Never use styrene pellets to package electronic instruments. The

pellets do not adequately cushion the instrument, do not prevent all

instrument movement, and can generate static electricity.

To return a module for service

1. Fill out a blue repair card (located at the end of this chapter)

and attach it to the instrument. Send a copy of any noted error

messages or other helpful performance data. If a blue repair card

is

a.

b.

c.

d.

e.

f.

g.

o

T

2.

the

equivalents

acceptable packaging.

available

not

service

of

Type

Description

intermittent

and

Name

Return

Model

Full

List

help

address

number

serial

any

of

prevent

factory

least

include

,

at

required

problem

the

of

returned

of

of

number

returned

returned

during

telephone

number

accessories

damage

packaging materials

best; however

are

, the

the following

whether

and

technical

of

instrument

instrument

with

transit,

. Original

following

information:

is

it

contact

instrument

the

pack

shipping

instructions

constant or

person

instrument

materials

result

in

or

in

1-12

Getting Started

a. Wrap

the instrument

in anti-static

plastic to

reduce

possibility of ESD damage.

b. For instruments that weigh less than 54 kg (120 lb), use a

double-walled, corrugated cardboard carton of 159 kg (350 lb)

test strength. The carton must be both large enough and strong

enough to accommodate the instrument. Allow at least three to

packing

sides

all

four

Surround

c.

material

carton.

is S.D

inches

on

the equipment

protect the

to

If packing foam is not available

.-240 Air Cap

California 94545. Air Cap

inch air bubbles

. Use pink anti-static Air Cap

of

with

module

TM

from Sealed

the instrument

three

and

Air Corporation, Hayward,

is plastic sheeting lled with 1-1/4

for

inches

four

to

prevent

to

movement

, the best alternative

. Wrapping

the instrument several times in this material should provide

sucient protection and also prevent movement in the carton.

3. Seal the carton with strong nylon adhesive tape.

CARE.

.

WITH

70810B

HP

Lightwa

e

v

4.

5.

Mark

Retain

the

copies

carton

of

FRA

shipping

all

GILE,

HANDLE

papers

the

material.

packing

of

Section

in

User's

the

Guide

System Verication

This chapter shows you how to verify basic lightwave section

functions.

What You'll Find in This Chapter

2

Verifying Basic Functions

:::::: ::::::::: ::::::: ::::::::: :::::

page 2-2

70810B Lightwa

HP

e

v

Section

User's

Guide

System

erication

V

2-1

Verifying Basic Functions

Because of specialized and expensive test-equipment requirements,

this chapter does not contain software-supported procedures needed

to verify module specications. This chapter does provide a procedure

that veries the basic functionality of the HP 70810B optical average

power meter, optical to electrical converter, and optical attenuator in

HP 70810B stand-alone mode.

The spectrum analyzer illustrated in Figure 2-1 is an HP 70000

modular spectrum analyzer with a calibrator output of 300 MHz at

0

10 dBm. The calibrator output is used as the modulation source for

the verication test. Any equivalent spectrum analyzer can be used.

The laser and power supply shown in Figure 2-1 may be substituted

with any modulatable laser.

If the lightwave section fails any one of the verication tests, contact

your local Hewlett-Packard service oce. The procedure for returning

and instrument for service is described in \Returning the Module for

Service"

Chapter

in

1

T

o

verify

basic

functionality

1.

2. Check the power-bar display for the HP 70810B in stand-alone

Figure

shown

Connect

mode

Figure 2-2

the

Initial

Figure

2-1.

. The display should be similar to that illustrated in

.

equipment

test

as

Operation

in

Equipment

est

T

2-1.

Setup

2-2

System V

erication

The gure illustrates the optical

as a power-bar graphic and an

does not match Figure 2-2 , press

average power reading displayed

annotated readout. If the display

4

5

on the display controlling the

I-P

HP 70810B and recheck the test setup. If the power bar response is

the

Clean

e

v

.

ber

Section

is

User's

used.

Guide

absent

optical

the

,

low

or

connectors

lightwave

verify

and

section

that

defective

be

may

single-mode

70810B

HP

optical

Lightwa

3.

A

erform

P

verage

the

Display

ower

P

calibration

Figure 2-2.

from

Operation

procedure

an

for

HP

an

70810B

optical

Stand-Alone

in

power

meter

.

intensity

the

Any

300 MHz.

the

optical

power

dierences

which

the

set

and a

Using

4.

the

Compare

5.

meter

between

listed

o

T

6.

spectrum

100

calibrated

the

lightwave

the

the

and

the

Chapter

in

observe the

analyzer

The

MHz.

optical

.

source

HP

power

70810B

optical

measured

5.

detection of

to

analyzer

levels

lightwave

levels

a modulated

a center

should

power

meter

measured

section.

should

be less

frequency of

display a

calibrate

,

by

than that

optical signal,

300 MHz

signal at

The signal represents the uncalibrated modulation power. The

analyzer display should be similar to that illustrated in Figure 2-3.

If it is not, perform an instrument preset for the HP 70810B,

recheck the test setup and instrument settings. If no signal is

the

displayed

probably

o check the operation

7. T

NNNNNNNNNNNNNNNNNNNNN

at

defective

NNNNNNNNNNNNNNNNN

ATTEN Manual

modulation

.

of the optical attenuator

and set the

lightwave

the

frequency

,

optical attenuator to 5 dB

section

, press

.

The signal level displayed on the spectrum analyzer should drop

by approximately

10 dB. (A 1 dB change in the optical attenuator

setting causes a 2 dB change in the signal level displayed on the

spectrum analyzer.) If the spectrum analyzer signal level does not

respond correctly to a change in optical attenuation, the lightwave

section

defective

is

.

is

span

is

of

of

70810B Lightwa

HP

e

v

Section

User's

Guide

System

erication

V

2-3

Figure 2-3. Spectrum Analyzer Display of Modulation Spectrum

2-4

System V

erication

HP

70810B

Lightwa

e

v

Section

User's

Guide

Operating

This chapter describes how to operate a lightwave section that has

been congured for stand-alone operation only.For information

about operating a lightwave signal analyzer system, refer to the

70000 Modular Spectrum Analyzer Operation Manual for HP 70900B

Local-Oscillator-Controlled Modules

What You'll Find in This Chapter

An Overview

Display Front-P

Overview

An

Front-P

Cleaning

anel

Connections

of Operation

anel Keys

Softkeys

of

Rear-P

and

anel

for

:

::

:

:

:

::

::

:

:

:

:

eatures

F

ccurate

A

.

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

:

Measurements

3

HP

3-2

page

:

:

:

:

:

:

:

:

::

::

::

::

:

:

:

:

:

:

:

:

3-5

page

:

:

:

:

:

:

:

:

:

::

::

::

::

:

:

:

:

:

:

3-6

page

:

:

:

::

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

3-7

page

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

:

:

3-9

page

:

:

:

:

::

:

:

:

:

70810B Lightwa

HP

e

v

Section

User's

Guide

Operating

3-1

An Overview of Operation

In stand-alone conguration for the lightwave section, there are two

modes of operation.

Lightwave mode

enables the optical detector and preamplier,and

calibrates the average power in optical units.

RF signal bypass mode

enables the lightwave section to pass an

RF signal through its RF INPUT and route it directly to the RF

OUTPUT.

An intensity-modulated 1200 nm to 1600 nm (750 nm to 870 nm for

an Option 850) lightwave signal on a single-mode ber can be directly

applied to the optical input. The intensity-modulated optical power

can be detected, as well as the average optical power.

In lightwave mode, the optical input is detected by a high-speed PIN

photodetector. The modulated portion of the input is then amplied

by a microwave traveling-wave amplier and passed to the RF output.

The gain of this amplier overcomes the noise gure of electrical

measurement

excellent

power is

on-screen as

The system

instruments

sensitivity

amplied

power

a

internally

is

standard lightwave

A

an Option

external

addition,

dynamic

850.

reference

built-in

the

.

range

detected

The

.

transimpedance

a

by

.

bar

calibrated

section,

calibration

user

the

over

optical

connected

nm

1300

feature

nm

1200

attenuator

the

to

average

amplier

two

at

and

1600

to

allows

output,

RF

component

and

optical

1550

also

wavelengths

and

nm,

allows

nm wavelength

operation

which

of

is

calibration

yields

optical

displayed

in

nm

850

at

range

awide

over

to

a

in

an

In

.

Note

Calibration

bypass

RF

In

bypassed

lightwave

section.

so

section

This

mode

that

lets

the

,

electrical

an

RF

you

PIN

INPUT

make

photodetector

passed

is

signal

OUTPUT

RF

the

to

electrical

power

and preamplier

directly from

the

of

measurements

are

the

lightwave

directly

from the RF INPUT on the lightwave section.

You may use the instrument preset

4IP5

key on the display front panel

at any time to return the instrument to a power-on state where all

operating parameters are reset.

the

The

lightwave

section

has

been

calibrated

as part

of

manufacturing process and does not require routine calibration by

user. All specications apply after the module temperature

the

has stabilized.

adequate for temperature stabilization.

module recalibrated by Hewlett-P

A warmup period of 30 minutes following turn-on is

We recommend you have the

ackard

at 12-month intervals

.

3-2

Operating

HP

70810B

Lightwa

e

v

Section

User's

Guide

Display Annotation

You will nd display annotation to be helpful when making

measurements from the front panel of the instrument. The display

annotation provides information about the current state of the

lightwave section. Refer to Figure 3-1 for information on the kinds of

display annotation that are available.

70810B Lightwa

HP

e

v

Section

User's

Guide

Figure 3-1.

Display

Annotation

Stand-Alone

for

Operation

Operating

3-3

Optical attenuator

indicates the current optical attenuator

setting in optical power units. Use the

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

ATTEN Manual

softkey to change the optical

attenuator setting.

Power meter readout

Mode indicator

Power bar

Zeroing indicator

Refer

softkey

section

the

to

operation.

\An

provides the current average power meter

readout annotated in optical dBm or watts

units. Use the units menu softkeys to change

the display annotation.

indicates whether the lightwave section is

in lightwave or RF bypass mode. Use the

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

N

select input

softkey to change modes.

provides a visual display of the average

optical power measured by the power meter.

is displayed while osets in the power meter

are being zeroed in either automatic or

manual zeroing mode. Use the ZERO softkey

function to zero the power meter manually.

information about

Overview

Softkeys"

of

for

3-4

Operating

HP

70810B

Lightwa

e

v

Section

User's

Guide

Display Front-Panel Keys

The display front-panel

4

DISPLAY

5

and

4

MENU

5

keys provide access to

the two dierent types of softkey menus. Pressing either key at any

time automatically selects the menu structure for the respective key.

A third display front-panel key,the

4

USER

5

key, is not implemented for

stand-alone operation.

The

4

DISPLAY

5

key selects the Display Main Menu, which allows access

to all display functions. Refer to the operation manual for the display.

The

4

5

MENU

key selects the softkey function menu for the lightwave

section. When the menu softkey is rst pressed, seven softkeys

appear at the right-hand side of the display screen. These softkeys

perform the most frequently used functions and provide access to the

next level of softkeys.

If no other instruments are installed in the mainframe or display, the

softkey menu for stand-alone operation appears when the mainframe

and display are switched on.

other

If

lightwave

the

lightwave

4

the

via

softkey

the

element

instruments

section

5

Y

menu

must

key

appears

section

DISPLA

stand-alone

in

installed

are

congured

is

rst

After

.

mode

,

and

selected

be

lightwave

the

the

.

the

in

for

section

mainframe

stand-alone

the

with

section

operates

display

or

operation,

N

N

N

N

NN

NN

NN

NN

N

N

N

N

NEXT

been

has

an

as

N

INSTR

and

the

N

NN

N

N

N

N

N

N

N

N

N

N

N

N

softkey

selected,

independent

70810B Lightwa

HP

e

v

Section

User's

Guide

Operating

3-5

An Overview of Softkeys

The softkeys selected by the

lightwave section functions. A softkey is designated by the following

convention:

All softkeys designated by lowercase letters indicate that a sub-level

softkey menu exists beyond that particular softkey. Uppercase letters

indicate that there are no further sub-level softkey menus for that

softkey.

Generally, a softkey that is underlined or displayed in inverse video

indicates that the function is enabled. When an active function is

enabled, it is always displayed in inverse video.

Using the Front Panel to Enter Data

Data values are required for some softkey functions. The entries

may be made using the numeric keypad, the

knob

softkey description

each

otherwise

both

turned.

is

Note

front-panel

under

Unless

determined

knob

the

other display

Two

(instrument

preset conditions

the

. That

mode

instrument

the

NNNNNNNNNNNNNNNNNNNNNNN

softkey

applicable

If

.

noted,

the

by

front-panel

preset) and

of

4

if

,

is

is

is pressed

5

I-P

preset

4

MENU

.

,

the rate

measurement

keys

4

(backspace). The

5

lightwave

the

that

to

5

key allow access to all of the

485

and

495

method

each

of

use

the

in the

\Softkey Descriptions"

the

range

may

of

and

be

of change

that

4

while

display

section

in

mode

the

to

RF

.

front-panel

speed

the

useful

key initiates

5

I-P

current

the

bypass

keys, and the

described

is

section.

knob

which

at

4

are

I-P

5

all

display

display

mode

is

,

4

The

reverse

presses

key

brings

key

5

sequence

are

you

the

of

saved.

through

back

softkeys

that

the

were

menu

structure

pressed. Up

in the

to the

last ten

3-6

Operating

HP

70810B

Lightwa

e

v

Section

User's

Guide

Front-Panel and Rear-Panel Features

Figure 3-2 illustrates front- and rear-panel features of either an

HP 70810B or an HP 70810B Option 850. Specications for the

lightwave section input and output connectors are provided in

Chapter 5.

Front-P

70810B Lightwa

HP

anel LEDs

User's

Section

e

v

Figure 3-2. HP 70810B Front Panel and Rear Panel

Each front-panel

lightwave

section

section.

executing

is

LED

The

indicates

LEDs

self-test.

its

a

ash

condition

and

on

activity

or

when the

o

of

If the ERR (error) LED lights at any time other than during self-test,

there is a problem with the lightwave section. Chapter 9 provides

ERR LED troubleshooting suggestions

If set by software

, the SRQ (service request) LED

.

can indicate certain

conditions or occurrences (for example, an error condition or the

completion of an operation). Self-test veries that the LED will light.

CT

A

The

request)

conditions

(active),

LEDs

.

RMT

indicate

(remote),

normal

HP

LSN

70810B

(listen),

and

activities

,

not

(service

SRQ

Guide

the

lightwave

error

Operating

3-7

Connectors and Latches

RF INPUT

OPTICAL INPUT

RF OUTPUT

Module latch

HSWP IN/OUT

Mainframe/module

The RF INPUT SMA connector presents a 50 

nominal input impedance.

The OPTICAL INPUT connector can be one of

several types listed as options under \Options

and Accessories" in Chapter 10.

The RF OUTPUT SMA connector provides a

50  nominal output impedance.

The module latch secures the lightwave

section in a mainframe. An 8 mm hex-ball

driver (shipped with the mainframe) ts the

lightwave section hex-nut latch.

Refer to Chapter 1 for lightwave section

installation and removal instructions.

When the lightwave section is congured in a

lightwave signal analyzer system the HSWP

synchronizes

signal

system

the

while

selected

.

master

local

frequency

system

high-sweep

The

oscillator

span.

operation

swept

is

with

signal

through

interconnect

HP-IB

buses

mainframe

the

the

and

connects

50-pin

The

HP-MSIB

lightwave

the

kHz

40

connector

communication

section to

power supply

accesses

.

is

the

high

a

and

3-8

Operating

HP

70810B

Lightwa

e

v

Section

User's

Guide

Cleaning Connections for Accurate Measurements

Accurate measurements require clean connections. Use the following

guidelines to achieve the best possible performance when making

measurements on a ber-optic system:

Keep connectors covered when not in use.

Use dry connections whenever possible.

Use the cleaning methods described in this section.

Use care in handling all ber-optic connectors.

If an extremely good match is a concern, characterize the connector

interfaces using both dry and wet connections. The results will

show you the level of return loss performance you can expect from

the connectors, dry and wet.

When physical contact is not made at the ber interface, use a

reliable or recommended index-matching compound to achieve

the best possible return loss, the lowest reection, and the lowest

.

of

to

loss

small

the

ensure

and

size

connections

good

gaps

air

removal

used

cores

of

damaged

,

index-matching

of

.

oor

P

ber

in

insertion

Because

be used

core misalignment,

improper use

optic

ber

connections

contamination,

,

ends

compounds

cables

result

.

care must

,

from

and

Note

To clean a dry connector

Index-Matching

strongly

HP

applied

to

compounds

attach

connection

dry

,

possible

a

Compounds

recommends

lightwave

the

required,

are

HMS-10/HP

an

and

that

section's

clean

make

index-matching

OPTICAL

thoroughly

adapter

connections

wet

cable

compounds

INPUT

every

after

the

to

the

at

not

connector

connection.

instrument

end

free

of

.

be

If

with

the

these

If

cable.

Use dry connections (without index-matching compounds). Dry

connectors are easier to clean and to keep clean. Dry connections can

be used with physically contacting connectors such as HMS-10/HP,

R

Diamond

40

improve

1. Apply isopropyl



,ST, DIN, and PC connectors. If a dry connection has

better

or

dB

return

loss

performance

.

alcohol to a clean lint-free swab or lens paper

Cotton swabs can be used

making a

,

connection

wet

will

as long as no cotton bers remain on

probably

not

.

the ber end after cleaning.

2. Clean the ber end with the swab or lens paper. Move the swab or

.

lens

paper

back

forth across

and

the

ber

end

several

times

70810B Lightwa

HP

e

v

Section

User's

Guide

Some

help

amount

remove

wiping

of

particles

or mild

when

scrubbing

application

the

of

of alcohol

ber

alone

can

end

will

Operating

not

3-9

To clean a wet connector

remove them. This technique can remove or displace particles

smaller than one micron.

3. Allow the connector to dry for about a minute.Or, use compressed

air to dry it immediately.

Using compressed air lessens the chance of deposits remaining

on the ber end. Do not shake or tip the compressed air can,

because this releases particles in the can into the air. Direct the

compressed air horizontally across the ber end.

4. As soon as the connector is dry, connect or cover it for later use.

Use of an index-matching compound cannot x a damaged connector.

Do not use gels in physically contacting connectors.

1. Use a clean lens paper to wipe any compound from the ber end.

2. Use a clean lens paper to clean the ferrules and other mating

surfaces of the connector.

compressed

clean

and

Use isopropyl

3.

to clean

air

Contact

recommended

alcohol, clean

the ferrule

and other

the manufacturer

solvents and

lint-free swabs

mating

of the

index-matching

cleaning procedures

,

connector

compound

.

surfaces

.

for

the

T

o

apply

arning

W

index-matching

Note

solvent

the

of

components

minute

for

it.

or

Some

swab

use

solvents

.

the

Move

.

compressed

Many

before

leave

can

Clean

4.

swab

Allow

5.

air

solvents

using

residues

ber

the

across

connector

the

it

dry

to

toxic.

are

solvent

the

on

with

end

ber

the

immediately

the

Read

when

or

connectors

alcohol

end.

for

dry

to

.

directions

disposing

damage

or

a

and

a

about

lint-free

Using compressed air lessens the chance of deposits remaining on

the ber end. Do not shake or tip the compressed air can, because

this releases particles in the can into the air. Direct the compressed

air horizontally across the ber end.

6. As soon as the connector is dry, connect or cover it for later use.

compound

1. Apply index-matching compound to the ber ends using a clean

wooden toothpick, the wooden end

little index-matching compound as possible

of a swab

.

Do not apply compound to the connector's sleeve

, or a syringe

.

.Useas

3-10

Operating

Immediately

2.

make

the

cable

connection.

HP

70810B

Lightwa

e

v

Section

User's

Guide

Programming

This chapter describes how to operate a lightwave section by remote

computer control.

What You'll Find in This Chapter

4

Getting Set Up for Remote Operation

::::: ::::::::: ::::::: ::

Communicating with the Lightwave Section

:

:

:

:

:

:

Transferring

Monitoring

Data

System

Computer

the

to

Operation

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:::::: ::::::::: :

::

::

::

::

:

:

:

:

:

:

:

:

::

::

::

::

:

page 4-2

page 4-3

4-6

page

:

:

:

:

:

:

4-8

page

:

:

:

:

:

:

:

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

4-1

Getting Set Up for Remote Operation

To connect your equipment for remote operation of the lightwave

section:

1. Connect the computer, the mainframe containing the lightwave

section, and other peripherals with HP-IB cables.

2. After the HP-IB cables are installed, reset all instruments

connected to the bus. If you are not sure how to reset a device,

switch its line power o, then on, to reset it.

3. Check the HP-IB address of the lightwave section on the address

map. The lightwave section must be congured (in row 0) so that it

is congured for stand-alone operation.

Note

To view the address map, press the

front-panel, then press the

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Address Map

4

DISPLAY

5

key on the display

softkey. Turn the knob

on the front panel of the display until the lightwave section

appears in the address map.

HP-IB

for

The lightwave

error-reporting

lightwave

The

column

the

than

observe

o

T

4.

N

N

N

N

NN

N

NEXT

N

N

N

N

N

N

N

N

N

N

N

N

N

N

N

N

N

N

N

INSTR

section must

capabilities

section

column

address

lightwave

the

N

N

N

N

NN

softkey

.

of

.

be located

default

The

address

display

the

section

in row

must

.

operation

0

column

also

address

have

the

on

a

display

access

column 20.

is

higher

press

,

and

value

the

4-2

Programming

HP

70810B

Lightwa

e

v

Section

User's

Guide

Communicating with the Lightwave Section

This section develops some fundamental techniques for controlling

the lightwave section and obtaining reliable measurement results.

The lightwave section is remotely controlled with commands that

correspond in general to front-panel softkey functions.

It is important to understand how messages are communicated to

the lightwave section; therefore, enter and output statements and

command syntax discussed in this chapter should be understood

before proceeding. HP BASIC is used for all examples in this manual.

Executing Remote Commands

The computer communicates with the lightwave section on the

Hewlett-Packard Interface Bus (HP-IB), using HP BASIC

ENTER

An

statements.

OUTPUT

statement tells the computer to send a message to the

lightwave section. For example, executing the statement below sets

dB:

3

the

optical

attenuator

to

OUTPUT

and

70810B Lightwa

HP

e

v

Section

User's

An

ENTER

statement

used

conjunction

in

with

lightwave

a

query returns information to the computer.To return the optical

attenuator value to the computer, rst form a query by adding a

question mark (?) to the command:

Guide

section

Programming

4-3

Next, the

ENTER

statement is used to assign the returned value to a

variable in the computer:

The value of the optical attenuator above is placed in the variable

named \Atten". The variable may be printed, stored, or used for

other computer functions.

Syntax Requirements

All of the program examples in this manual show recommended

command syntax. All lightwave section commands must be

constructed according to specic syntactical rules which are outlined

Chapter

in

commands

That

8.

alphabetical

in

chapter

lists

order

.

all

of the

remote lightwave

section

T

to

Refer

lightwave

valid

all

Local

and

Whenever

front-panel

executing

or

key

softkeys

the

of

front-panel

The

under the

When the

Chapter

in

8-2

able

remote

Control

section

disabled

are

ASIC

B

HP

Remote

lightwave

the

softkeys

section

the

.

indicators on

following conditions

lightwave section

a complete

for

8

commands

remotely

is

blanked.

and

statement

the HP

70810B

when the

is addressed,

alphabetical listing

.

addressed,

Pressing

LOCAL

reactivates

Lightwave

HP-IB interface

the RMT

indicator

display

the

4

the

Section

used:

is

LOCAL

operation

lights

When the lightwave section receives information, the LSN indicator

lights.

When the lightwave section sends information, the TLK indicator

lights.

When

occurred

has

measurement

a

and the

event

(for

lightwave

example

section

, end

requesting

is

computer

sweep)

the

of

attention, the SRQ indicator lights (provided that the

service-request mask

is set to allow SRQ on end-of-sweep).

of

5

light

.

4-4

Programming

HP

70810B

Lightwa

e

v

Section

User's

Guide

Initial Program Considerations

Programs should begin with a series of HP BASIC statements and

lightwave section commands that form a good starting point for

lightwave measurements. The following example shows how to

initialize the lightwave section.

10 ASSIGN @Lws to 720

20 CLEAR @Lws

30 OUTPUT @Lws;"LTWAVE ON;IP;"

The

ASSIGN

name to an I/O device. In the example above, the I/O path name is

@Lws

. It is assigned to the device at interface select code 7 (the HP-IB

interface), and at HP-IB address 20.

statement creates an I/O path name and assigns that

Note

All program examples in this manual assume that the lightwave

section is addressed at HP-IB address 20.

Using the

the

important,

is

Many

assume

CLEAR

output

that

so

devices

only

address

the

of

that

an

is

buer

is

it

on

instrument

one

ASSIGN

the

of

using

examples

the

HP B

and

,

ready

bus

the

statement in a program makes it easier to change

lightwave

ASSIGN

@Lws

in

I/O

section.

can

this

path

ASIC statement

command parser

the

for operation.

so

or in

other instruments

that

singly

also

chapter

name

that

This

unison.

applications

In

improve

in

and

,

already

is

clears

of

command

is

It

program

the

the

specied

the

often

on

where

language

assigned.

input

be

may

desirable

the

speed

performance

reference

the

,

buer

instrument,

to

used

clear

to

not

are

bus

.

clear

aected.

used.

only

clear

o

T

all

clear

o

T

instrument

the

,

IP

the lightwave

the

devices

preset

section

lightwave

select

at

command,

the

for

section,

code

current

CLEAR

CLEAR

7,

presets

mode

@Lws

must

7

of

all

operation,

of

should

the

be

used.

be

parameters

and

of

provides

a good starting point for all measurement processes. ExecutingIPis

actually the same as executing a number of commands that set the

lightwave section to a known state.IPdoes not change the mode of

operation (lightwave optical or RF bypass).

,

70810B Lightwa

HP

e

v

Note

Section

User's

Guide

Turning

.

mode

the

power

on

presets

instrument

the

the lightwave

to

optical

Programming

4-5

Transferring Data to the Computer

The lightwave section returns information as decimal values in

fundamental units shown in Table 4-1. The lightwave section also

applies these units to data received from the computer which do not

explicitly specify units.

Table 4-1. Units for Returned Data

Requesting

and

Receiving

indicated

As

returned

command

can

in

is

either

information,

certain

on

the

to

Refer

manual

for

Data

transfer

Data

lightwave

a

conjunction

computer

.

Measured

Fundamental Unit

Data

Amplitude dBm, watt

Power dBm, watt

Ratio dB

Responsivity volt/watt

able 4-1

in T

several dierent

select the

to

used

single unit

or

a

be set

can

it

specify

measurement

description

information.

more

simplicity

varies

section

with

in

query

a lightwave

, power

settings

of

.An

and amplitude

units.

desired unit.

to be

to automatically

.

UNITS

A

the

,

HP B

section query

The A

but

ASIC

information

UNITS (amplitude

The

all

for

used

select

command

cases

all

in

ENTER

statement

returns information

UNITS

A

power

the

Chapter

in

initiated

is

may

units)

command

amplitude

and

based

,

units

8

with

in

be

this

of

to the

4-6

Programming

Form a query by adding a question mark (?) at the end of an

lightwave section command. The syntax charts in Chapter 8 show

which commands can be used in queries.

In the following example, the optical attenuator value is returned to

computer:

the

User's

Section

e

v

Lightwa

70810B

HP

Guide

Use the

the computer:

ENTER

statement to assign the returned value to a variable in

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

4-7

Monitoring System Operation

The programming techniques discussed so far describe communication

between the lightwave section and the computer, where the sequence

of all data transfer is controlled by a computer program. This section

describes how the lightwave section can interrupt computer operation

when the lightwave section has attained a particular state.

The interrupting process is called a service request. Service

requests have many applications. They facilitate economical use of

computer-processing time when the lightwave section is part of a

large measurement system. For example, after the computer initiates

a lightwave section measurement, the computer can make calculations

or control other devices via HP-IB while the lightwave section is

measuring. When the lightwave section is through, it signals the

computer with a service request. The computer's service-request

subprogram then determines what the computer will do next. Service

requests can also be used to report lightwave section errors.

Interrupt

Process

interrupt

The

attention

computer

the

and

This

the

by

must

computer

user-specied

a

call

subroutine

service

subroutine

service

(since

subroutine(s)

that more

and each

steps are

than

instrument

summarized

1. Computer

process

setting

be

is

request.

which

there

will

one

begins when

the HP-IB

programmed

programmed

determine

must

Then,

determines

may

called

be

instrument

may

below

monitors HP-IB

the lightwave

service-request line

respond to

to

interrupt normal

to

subroutine

when

which

be

may

it

a

why

than

more

be

respond

to

may

more

have

.

service

the

instrument(s)

necessary

particular

possible

one

the

to

request

one

than

request

section \requests"

(SRQ) true

this event.

program execution

to

call

request

HP-IB

on

another

service

instrument

cause).

indicated

service

event

line

event(s).

simultaneously

report.

to

(SRQ).

. The

Typically

occurs

caused

requested

Finally

Note

These

2. Lightwave section requests service by setting the SRQ line true.

3. Computer branches to routine that determines the instrument(s)

that caused the SRQ.

4. Computer branches to routine that determines why a particular

instrument

Computer

5.

particular

requesting

is

branches

to

instrument.

service

routine

.

to

process

specic

a

event

in a

Some of the routines above may be omitted, if only one instrument

a particular instrument

has been instructed to use the SRQ line

,orif

has been instructed to use the SRQ line for only one event.

,

.

a

,

,

4-8

Programming

Several system-level statements are required to make the computer

responsive to service requests. The HP BASIC statement, ENABLE

INTR (enable interrupt), tells the computer to monitor the

e

v

Section

species

request

one

User's

service-request

computer

.

an

if

the

more

If

instrument

where

occurs

or

line

than

The

.

program

one

cause

can

on-interrupt

branch

will

instrument

service

a

statement,

when

cause

could

request

70810B

HP

INTR,

ON

service

a

service request,

the

more than

for

Lightwa

Guide

reason, the serial-poll statement, SPOLL, is used. The serial-poll

statement is always required to clear the service request being

generated by the instrument.

Lightwave Section Status Byte

The lightwave-section status byte indicates the status or occurrence

of certain lightwave section functions. The status byte contains eight

bits, numbered 0|7 with bit 0 being the least signicant bit.

Bits 0, 1, 2, 3, 4, 5, and 7 represent specic conditions or events.

These bits are referred to as condition bits and event bits. Condition

bits reect a condition in the lightwave section which may be present

or absent at any given moment. Event bits reect the occurrence of a

transition or event within the lightwave section.

Bit 6 is set by the lightwave section to indicate whether or not it is

requesting service.

When the lightwave section is instructed not to use the service

request line on HP-IB, the status bits always reect the current

condition of the lightwave section. In this situation, the

the

exact

not

status

instant

reliable

byte

when

should

a

of

not

transition

service

requests

used. Event

be

the lightwave

in

are

bits are

section and

disabled.

event bits

only true

as such

in

at the

are

lightwave

When

for

current

generated.

are

section

STB?

system-level

byte

the

The

the

more

or

one

condition

Then,

(by the

until

HP

held true

command, or

statement) is

to once

lightwave

again reect

section.

Service-Request

The service-request mode is enabled and controlled by the

request-service-condition command, RQS. It denes a service-request

mask that species which of the status-byte bits may generate a

service request.

the following

In

COMMAND-COMPLETE

OUTPUT @Lws;"RQS 48;"

OUTPUT @Lws;"RQS ";DVAL("00110000",2)

request

by

ASIC

B

the

requests

the

request

the

status

within

section

conditions

lightwave

the

of

bits

the

status

the

ASIC

B

an

until

instructed

is

the

,

events

or

section

generating

byte

HP-IB

are

read

is

system-level

DEVICE

which

SPOLL

received. These

the

current

conditions

generate

to

status

until

out

CLEAR

actions

of

service

reect

bits

service

a

service

the

lightwave

the

statement),

(HP

clear

events

and

Mask

ERROR-PRESENT

5

and

the

4)

for

service

requests:

example

species

RQS

,

states (bits

Selects bits 5 and 4 (32+16) to enable service re-

quest mode for ERROR-PRESENT and COMMAND-

COMPLETE.

Also selects bits

5 and 4 as above

, but is somewhat

easier to read.

is

CLEAR

and

70810B Lightwa

HP

e

v

Section

User's

Once RQS is executed, the lightwave section requests service by

setting

the

SRQ

line

true

when

the desired

conditions

Guide

events

or

Programming

occur

.

4-9

Table 4-2. Lightwave Section Status Byte

Bit

Number

Equivalent

7 128 OUT OF RANGE Optical power is out of range for

6 64 RQS Set when service request is being

5 32 ERROR-PRESENT Set when error register contains an

4 16 COMMAND-COMPLETE Set at completion of command

3 8 ZEROING Optical power meter is executing its

2 4 Not Used

1 2 MESSA

0 1 Not Used

Service-Request

Decimal

Examples

Lightwave Section

State

GE

following

The

errors

is

in

interrupted

program uses

the lightwave

and

Description Bit

optical average power meter (too

low or too high).

generated.

error.

execution.

zeroing function.

displayed.

Set

section.

description

a

when

service

messages

an

If

the

of

are

requests

error

error

to

occurs

is

monitor

computer

,

printed.

Type

event

|

condition

event

condition

condition

measurement

operation

the

This

HP-IB

10

20

/Insts/

COM

ASSIGN

@Lws

Example.

and

is

@Lws

720

TO

returns

on

30 CLEAR @Lws

40 OUTPUT @Lws;"IP;SNGLS;TS;"

50 ON INTR 7 CALL Lws_error

60 ENABLE INTR 7;2

70

OUTPUT

@Lws;"RQS

32;"

A measurement program would normally be inserted at this point in

program.

an

error

.

only

service

instrument

one

program

description.

enables

ERROR-PRESENT

an

assumes

It

that

Sends unrecognized commands to lightwave section.

Enable computer interrupts for SRQ on interface

#7.

(IFC)

code

select

request

4-10

Programming

HP

70810B

Lightwa

e

v

Section

User's

Guide

80 END

90 SUB Lws_error

100 COM /Insts/ @Lws

110 DIM Errs$(1:6)[64]

120 INTEGER Status_byte

130 Status_byte=SPOLL(@Lws)

140 IF (BIT(Status_byte,5)) THEN

150 OUTPUT @Lws;"XERR?;"

160 ENTER @Lws USING "%,K";Errs$(*)

170 PRINT "Lightwave Section has reported

the following error(s):"

180 PRINT USING "K,/";Errs$(*)

You would normally take action at this point in program to

determine which errors had occurred and x the problem, or halt the

measurement.

IF

190

200

210

END

ENABLE

SUBEND

INTR

7

This will clear the SRQ on HP-IB.

Verify the lightwave section has errors to

report.

Ask lightwave section for extended error

list.

Read error list from lightwave section.

eenable

R

SRQ

interrupts

.

Monitoring System

Operation

The STB

byte

the

of

conducting

status-byte

without

command

time

any

at

status

a

is

Using

Executing

.

to

byte

serial

updated

may

the

poll

Service

used

be

computer

the

of

reect

to

STB?

status

Requests

monitor

to

returns

Executing STB

.

. When

byte

current

lightwave

value

the

the decimal

is

STB

section

status

the

of

equivalent

similar

is

to

executed,

conditions.

the

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

4-11

4-12

Programming

HP

70810B

Lightwa

e

v

Section

User's

Guide

Specications and Characteristics

This chapter contains the module specications for the HP 70810B

and HP 70810B Option 850 lightwave sections.

What You'll Find in This Chapter

5

Conguration Modes

:::::::::::::::::::::::::::::::::::::::::

HP 70810B Module Specications

Module

70810B

HP

Module

This

related

Input

information

specications

specications

user

should

understand

Specications

Option

and

850

Output

and

organized

is

characteristics

and

characteristics

the

describe

Characteristics

distinction

warranted

temperature

continuous

of

hour

noted.

Unless otherwise noted, corrected limits are given

when a specication range is improved with

error-correction routines.

Characteristics

provide useful, but non-warranted, functional and

performance

italics

in

is not

in

warranted

a

::::::: ::::::::: :::::: ::::::

Specications

into two

together

range

information.

text

the

:

:

:

:

:

:

:

:

categories:

in

ables

.T

same

the

,in

between

the

performance



0

of

+55

to

C

operation,

characteristic

A

you

alert

to

specication.

::

::

:

:

:

:

:

:

:

:

:

::

::

::

:

:

:

:

:

:

measurement-

chapter

this

format.

terms:

the

over



after

C

that

otherwise

parameter

the

unless

page 5-2

page 5-3

page 5-6

page 5-10

list

The

one

appears

70810B Lightwa

HP

e

v

Section

User's

Guide

Specications

Characteristics

and

5-1

Conguration Modes

The HP 70810B and HP 70810B Option 850 lightwave sections can

be congured for operation in two modes: a lightwave module can

operate either as part of an integrated measurement system (a

lightwave signal analyzer) or operate independently in a stand-alone

conguration.

A lightwave signal analyzer consists of an electrical spectrum analyzer

and an HP 70810B lightwave section. The lightwave section is mated

with and calibrated to the RF section of the spectrum analyzer.

The HP 71400C lightwave signal analyzer includes the HP 71210C

microwave spectrum analyzer. The HP 71401C lightwave signal

analyzer includes the HP 71100C RF spectrum analyzer (with options

002 and 004).

When a HP 70810B lightwave section is congured as part of an

HP 71400C or HP 71401C lightwave signal analyzer, refer to the

specication reference chapter in the

HP 70000 Modular Spectrum

Analyzer Installation and Verication Manual for HP 70900B

Local-Oscillator

characteristics

and

stand-alone mode

a

be used

signal analyzer

section of

when

the

system

spectrum

Controlled

provided

operation.

of

lightwave

and

analyzer

Modules

this

in

section

not

has

.

chapter

These

is

been

.

module

The

module

congured

calibrated

specications

directly

apply

specications

part

as

with

of

a

the

the

to

must

lightwave

RF

also

Note

special

a

70810B

HP

mating

71210C

HP

provides

It

system.

(module

user

any

panel

rear

Option

calibration

and

system,

system

the

calibration

This

corrections)

calibration.

both

of

(system

020

of

with

or

performance

is

the

of

Option

HP

the

adjustment

HP

the

HP

the

addition

in

lightwave

020

70810B

71810B

70904A of

of

to

module

denoted

is

the

and

calibration)

and

an

HP

HP

with the

HP 71400C

an

standard factory

is

and

,

labels

by

electrical

RF

is

70908A

71100C

or HP

of

system.

71401C

calibrations

independent

the

axed

to

section

(HP

an

of

70908A or HP 70904A). These labels indicate, by serial number, which

modules were mated for calibration.

When the HP 70810B lightwave section is used with an RF section

other than the one it was mated and calibrated with, the system

will

not

provide the specied system frequency response. Module

corrected

specications

will

then

govern

system

performance

.

Specications and

5-2

Characteristics

HP

70810B

Lightwa

e

v

Section

User's

Guide

HP 70810B Module Specications

This section lists HP 70810B lightwave section measurement-related

specications and characteristics. These specications and

characteristics apply to HP 70810B stand-alone operation or to

systems which include an HP 70810B that has not been mated and

calibrated with the RF section installed in the system.

All amplitude specications are in optical dB unless noted otherwise.

70810B Lightwa

HP

e

v

Section

User's

Guide

Specications

Characteristics

and

5-3

Table 5-1. HP 70810B Specications and Characteristics (1 of 2)

Wavelength Range

(characteristic) 1200 nm to 1600 nm

Frequency Range

100 kHz to 22 GHz

(demodulated signal)

Average Power Accuracy Factory-Calibrated User-Calibrated

(at 1300 and 1550 nm) (by external power meter)

6

0.65 dB65nW

6

connector variation

*

6

0.05 dB65nW

6

power meter accuracy

Responsivity

(characteristic)

The responsivity is given for each instrument and is

accurate to620%

Nominal

Noise

V

Equivalent

ower

P

V/watt

1200

Frequency

Noise

Equivalent

Power

MHz

100

at

alue

p

dBm/

55

100

1

10

100

8 GHz

16

kHz

MHz

MHz

MHz

GHz

to

10

to

100

to

to

to 16

to

22

1

8

MHz

MHz

MHz

GHz

GHz

GHz

0

dBm/

61

0

dBm/

66

0

dBm/

70

0

dBm/

68

0

dBm/

64

0

p

p

p

p

p

H

H

H

H

Hz

H

z

z

z

z

z

y

Specications and

5-4

Frequency

Relative

to 100

Response

MHz

Frequency

100 kHz to 2.9 GHz

2.9 GHz to 22 GHz

Corrected

6

2.0 dB

6

5.0 dB

z

x

x

(characteristic) Uncorrected response rollo is<25 dBx100 kHz to 22 GHz

ower

Optical

ower

P

Safe

vary with such factors as connector type and quality

damage, and wear

,

Maximum

Input

*

Connector losses

cleanliness, temperature

y

Applies to any wavelength when the average power readout is set to match the

verage

A

+15

Power

dBm

.

Modulated

+15

P

dBm

, connector

reading of an external calibrated optical power meter. Does not include VSWR losses.

z

Specications achieved by applying module responsivity and/or frequency-response

units

.

.

User's

Section

e

v

Lightwa

70810B

HP

correction

x

Amplitude

factors

stored

measurement

Characteristics

in

the

is

70810B

HP

electrical

in

memory

dB

Guide

Table 5-1. HP 70810B Specications and Characteristics (2 of 2)

Harmonic Distortion

Output

0

10 dBm 43 dB*below fundamental

Optical Input Return Loss

with HMS-10/HP connector,

0 dB input attenuation

Electrical Input Flatness

Corrected

y

(characteristic)

Electrical Output Return

Loss

(characteristic)

Insertion

Bypass

Loss

Mode

z

All internal reectances

(specication).

**

0

40 dB and total return loss35 dB

Frequency Amplitude Error

100 kHz to 6 GHz 1.4 dB

6 GHz to 12 GHz 1.6 dB

12 GHz to 16 GHz 2.0 dB

16 GHz to 22 GHz 2.2 dB

Frequency Return Loss

GHz

6

to

kHz

100

GHz

12

to

GHz

6

GHz

16

GHz

to

to

22

GHz

12 GHz

16

Frequency

GHz

to 6

kHz

100

GHz

12

to

GHz

6

GHz

16

to

GHz

12

GHz

22

to

GHz

16

12.0

10.5

dB

8.5

dB

7.5

Insertion

dB

2.5

dB

3.7

dB

4.9

dB

5.2

dB

dB

*

*

*

*

*

*

*

*

Loss

*

*

*

*

70810B Lightwa

HP

Input Connectors Single-Mode Fiber Connectors

(Option-dependent) Diamond HMS-10/HP, FC/PC, ST, Biconic,DIN

*

Amplitude measurement is in electrical dB units.

**

27

y

This

with

dB

When

specication

the

is

optical

a lightwave

for serial

input attenuation

installed

section

is

prex

5



3237A

(characteristic)

dB

measurement

a

in

and

above

value to the related atness specications for the system. A

doubles

z

the amount of amplitude-error that must be added to the system specications

When a lightwave section is installed in

a measurement system, add the insertion-loss

Serial

.

system,

dding a second lightwave section

prex

add

value to the related absolute-amplitude specications for the system. A

lightwave

section doubles the amount of insertion loss that must be added to the system

3242A

the

dding a second

and

amplitude-error

specications.

Characteristics

e

v

Section

User's

Guide

Specications

and

below:

.

5-5

HP 70810B Option 850 Module Specications

This section lists HP 70810B Option 850 lightwave section

characteristics and measurement-related specications. These

specications and characteristics apply to HP 70810B stand-alone

operation or to systems which include an HP 70810B that has not

been mated and calibrated with the RF section installed in the system.

All amplitude specications are in optical dB unless noted otherwise.

Specications and

5-6

Characteristics

HP

70810B

Lightwa

e

v

Section

User's

Guide

Table 5-2.

HP 70810B Option 850 Specications and Characteristics (1 of 2)

Wavelength Range

750 nm to 870 nm

(characteristic)

Frequency Range

100 kHz to 22 GHz

(demodulated signal)

Average Power Accuracy Factory-Calibrated User-Calibrated

(At 850 nm) (By external power meter)

6

0.65 dB65nW

6

connector variation

*

6

0.05 dB65nW

6

power meter accuracy

Responsivity

(characteristic)

The responsivity is given for each instrument and is accurate

to620%

Nominal

Noise

V

Equivalent

ower

P

V/watt

500

Frequency

Noise

Equivalent

P

MHz

100

at

alue

p

dBm/

51

100

10

100

16

1

8

kHz

MHz

MHz

MHz

GHz

GHz

to

to

to

to

to

10

100

to 8

16

22

1

MHz

MHz

MHz

GHz

GHz

GHz

0

dBm/

57

0

dBm/

62

0

dBm/

66

0

dBm/

64

0

60 dBm/

0

p

p

p

p

p

H

H

H

H

H

H

z

z

z

z

z

z

y

ower

70810B Lightwa

HP

Frequency

Relative

to 100

Response

MHz

Frequency

100 kHz to 2.9 GHz

2.9 GHz to 22 GHz

Corrected

6

2.0 dB

6

5.0 dB

z

x

x

(characteristic) Uncorrected response rollo is<25 dBx100 kHz to 22 GHz

*

Connector

cleanliness

y

Applies to any wavelength when the average power readout is set to match the

losses

temperature

,

vary

with

damage

,

such

,

factors

and

of an external calibrated optical power meter

z

Specications achieved by applying module responsivity and/or frequency-response

as connector

wear.

. Does not include VSWR losses

correction factors stored in the HP 70810B memory

x

Amplitude measurement is in electrical dB units

Guide

User's

Section

e

v

type

.

.

quality

and

Specications

connector

,

.

Characteristics

and

reading

5-7

Table 5-2.

HP 70810B Option 850 Specications and Characteristics (2 of 2)

Maximum Safe Optical Average Power Modulated Power

Input Power

+15 dBm +15 dBm

Harmonic Distortion

Output

0

10 dBm 43 dB*below fundamental

Optical Input Return Loss

(characteristic)

with HMS-10/HP connector

>

27 dB with optical input attenuation5dB

Electrical Input Flatness

Corrected

y

(characteristic)

Electrical

Output

Return

Loss

(characteristic)

Bypass

z

Loss

Mode

Insertion

Frequency Amplitude Error

100 kHz to 6 GHz 1.4 dB

6 GHz to 12 GHz 1.6 dB

2.2

Return

12.0

10.5

8.5

7.5

2.5

dB

dB

dB

dB

dB

dB

dB

GHz

12

GHz

16

Frequency

100 kHz

GHz

6

GHz

12

GHz

16

Frequency

kHz

100

GHz 2.0

to 16

GHz

22

to

GHz

6

to

GHz

12

to

GHz

16

to

GHz

22

to

GHz

6

to

Insertion

6 GHz to 12 GHz 3.7 dB

12 GHz to 16 GHz 4.9 dB

16 GHz to 22 GHz 5.2 dB

*

*

*

*

Loss

*

*

*

*

Loss

*

*

*

*

Input Connectors Single-Mode Fiber

(Option-dependent) Diamond

*

y

value to the related atness specications for the system. A

doubles the amount of

z

value to the related absolute-amplitude specications for the system. Adding a second

lightwave section doubles the amount of insertion loss that must be added to the system

specications

Specications and

5-8

Connectors

FC/PC,

,

Amplitude measurement is in

HMS-10/HP

electrical dB units

.

When a lightwave section is installed in a measurement system,

dding a

amplitude-error that must be added to the system specications

Biconic,

,

ST

add the amplitude-error

second lightwave section

DIN

.

When a lightwave section is installed in a measurement system, add the insertion-loss

.

Section

e

v

Lightwa

70810B

Characteristics

HP

User's

Guide

Table 5-3.

HP 70810B and HP 70810B Option 850

General Specications and Characteristics

Temperature Operation Storage

0Cto+55C

HP 70810B Weight

(characteristic) 1.75 kg (3.9 lb)

HP 70810B Dimensions

Standard 1/8-width module

0

40C to +75C

70810B Lightwa

HP

e

v

Section

User's

Guide

Specications

Characteristics

and

5-9

Module Input and Output Characteristics

This section covers the input and output specications and

characteristics of the HP 70810B and HP 70810B Option 850 lightwave

section modules. The data in this section is a characteristic unless

identied as a specication in Table 5-1 or Table 5-2 .

Lightwave Input

RF Input

Output

RF

HSWP

In/Out

HP 70810B wavelength range

:::::: ::::::::: ::::

HP 70810B Option 850 wavelength range

Frequency range (demodulated signal)

Maximum input average optical power

Input ber size

Frequency Range

:::::: ::::::::: :::::: ::::::::: ::::::: ::::

:::::::::::::::::::::::::::::::::::::

VSWR

0 GHz to 6 GHz

6 GHz to 12 GHz

12 GHz to 22 GHz

actual

The

RF

the

actual

The

power

analyzer

input

section

safe

the

of

.

Frequency

Insertion

Type

Line

Sweep

condition

Maximum

Maximum

RF section

Range

Loss

:

:

Delay

Current

:::::: ::::::::: :::::: ::::::::: ::::::: ::::::::: ::<

::::::: :::::::: ::::::: ::::::::: ::::::: :::::::::<

::::::::::::::::::::::::::::::::::::::::::::::<

limited

is

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

is

the

in

limited

installed

:

:

:

:

:

:

:

::

:

:

:

:

:

:

:

:

:

::

::

:

:

:

::

::

:

:

:

:

:

:

:

:

:

:

:

frequency

is

that

input

:

:

:

:

:

:

::

::

:

:

:

:

:

:

:

:

:

Draw

range

installed

power

that is

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:::::::::

:::::::::::

:::::::::::::::::::::

the

by

the

:

:

:

:

::

:

:



::

the

:

:

::

:

s

::

:

:

:

:

low

from

signal

maximum

lightwave

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

=

HSWP

:

:

:

:

:

:

lightwave

by

in

:

:

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

200

::

::

:

1200 nm to 1600 nm

750 nm to 870 nm

100 kHz to 22 GHz

+15 dBm

9 micron core

0 Hz to 22 GHz

1.3

1.5

1.9

frequency

analyzer

safe

range

input

of

.

signal

GHz

22

to

Hz

0

:

:

:

:

:

dB

5.2

<

:

:

:

::

:

:

:

:

:

:

:

collector)

(open

TTL

sweep

to

ready

not

sweep

to

high

mA

:

16

::

:

:

:

:

:

:

:

:

:

:

:

Specications and

5-10

Characteristics

HP

70810B

Lightwa

e

v

Section

User's

Guide

Menu Maps

This menu map graphically represents all top-level softkeys and their

associated lower-level softkeys (the top-level softkeys are located

along the left side of the display). Figure 6-1 illustrates the display

menu organization for the lightwave section softkeys. A description of

each softkey is listed in alphabetical order in Chapter 7.

What You'll Find in This Chapter

6

Softkey

Menu

Map

Stand-Alone

for

Operation

page

6-2

:

::

:

:

:

:

:

:

:

:

:

:

:

70810B Lightwa

HP

e

v

Section

User's

Guide

Menu

Maps

6-1

*

the

If

not

is

N

N

N

N

N

N

N

N

N

N

N

N

N

N

LAMBDA

lightwave

displayed.

N

N

N

N

N

N

N

N

N

N

N

N

N

N

NN

N

N

N

N

850nm

section

The

N

N

N

N

softkey

an

is

N

N

N

N

N

N

N

N

N

N

N

N

N

N

LAMBDA

.

HP

N

N

N

NN

N

N

70810B

N

N

N

N

N

N

N

N

N

N

N

N

N

N

1330nm

N

N

N

N

N

N

softkey

Option 850,

replaced

is

the

softkey

the

by

6-2

Menu Maps

Figure

6-1.

Softkey

Menu

Map

Stand-Alone

for

70810B

HP

Lightwa

Operation

Section

e

v

User's

Guide

Dictionary Reference

This chapter contains descriptions of softkeys and front- and

rear-panel features and connectors.

What You'll Find in This Chapter

Alphabetical Listing of Softkeys, Connectors, and Latches::page 7-2

7

70810B Lightwa

HP

e

v

Section

User's

Guide

Dictionary

Reference

7-1

Alphabetical Listing of Softkeys, Connectors, and Latches

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

A UNITS

AutoMan

(absolute amplitude units) selects default amplitude

units. The softkey also allows either dBm or watts units

3

to be selected manually.

The function is preset for automatic mode and dBm

units annotation. To set the softkey function to manual,

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

ATTEN

Manual

press the softkey or select an alternate amplitude

readout unit using either the

(manual attenuator) allows the optical input attenuation

to be entered manually. The optical input attenuation

3

range is from 0 to 30 dB in 1 dB steps in optical decibel

NNNNNNNNNNN

dBm

or

NNNNNNNNNNNNNN

WATT

units.

In RF bypass mode, the lightwave section RF INPUT is

connected directly to its RF OUTPUT, bypassing the

optical input attenuator.

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

AUTZERO

On Off

(automatic

the

in

3

This function

zeroing to

according to

attenuator setting

below for

intervals

time

zeroing)

internal

occur

the

selects

power

preset

is

automatically

average

the

that

power

.

meter

ON,

to

power

selected.

is

ranges

automatic

.

which

at

and

zeroing

allows

given

being

Refer

their

softkey.

osets

of

the

intervals

time

the

and

table

measured

to

corresponding

the

ower

P

Attenuation

dBm

10

0

to

dBm

20

0

to

dBm

30

0

to

dBm

40

0

to

100

100

100

minutes

10

Time

minutes

minutes

minutes

Range

1

2

3

4

5

Optical

Level

0

10

0

20

0

30

0

0

40 to050 dBm 1 minute

During zeroing, the light input is blocked by the internal

optical attenuator wheel.

when the

When

N

N

N

N

N

N

N

NN

N

ZERO

See:

Off

N

N

N

N

softkey

N

N

N

N

N

ZERO

occurs

NN

N

N

N

selected,

is

N

N

N

N

pressed.

is

zeroing

softkey description for more information.

only

Dictionary Reference

7-2

HP

70810B

Lightwa

e

v

Section

User's

Guide

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

cal opt

power

(calibrate optical power) enables access to the calibrated

wavelengths and the user-specied power level

3

functions listed below.

Softkeys available with a standard HP 70810B:

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

LAMBDA

1300 nm

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

LAMBDA

1550 nm

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

USR CAL

On Off

Lambda (wavelength) 1300 nm

3

Lambda (wavelength) 1550 nm

3

User power calibration

3

Softkeys available with an HP 70810B Option 850:

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

LAMBDA

850 nm

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

USR CAL

On

3

Off

Lambda (wavelength) 850 nm

power calibration

User

3

N

N

N

N

NN

N

N

N

N

N

dBm

HSWP

N

N

N

N

N

N

N

N

N

N

N

NN

NN

N

IN 1 LW

NNNNNNNNNNNNNNNNNNNN

IN 2

IN/OUT

N

N

N

N

N

N

N

NNN



W

for

a

in

signal

system

the

.

softkey functions

These

lightwave

to the

Refer

information.

more

to

used

is

When

lightwave

synchronizes

master

the

frequency

section when

related

select

the

softkey

dBm

lightwave

signal analyzer

system operation

.The

high-sweep signal

local oscillator

span.

are

using

units

section

is swept

necessary

OPTICAL

the

function

amplitude

for

is

system

through a

calibrate

to

INPUT

descriptions

readouts.

congured

HSWP

the

with the

while

high

is

selected

(lightwave input port) selects the OPTICAL INPUT on

the front panel of the lightwave section and activates

lightwave mode for the module.

When congured for stand-alone operation the

lightwave section functions as an optical-to-electrical

A

.

the

meter

power

signal

power

converter and

bar display

and

optical

an

numeric

average

readout

power

for

meter are displayed on screen.

(microwave input port) selects the RF INPUT on the

front panel of the lightwave section and activates RF

bypass mode for the module

. In RF bypass mode a signal

is passed directly from the RF INPUT to the RF OUTPUT

of the lightwave section.

70810B Lightwa

HP

e

v

Section

User's

Guide

Dictionary

Reference

7-3

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

LAMBDA

850 nm

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

LAMBDA

3

1300 nm

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

LAMBDA

nm

1550

(lambda wavelength 850 nm) selects 850 nm as the

calibrated wavelength when using the OPTICAL INPUT.

The appropriate wavelength depends on the lightwave

signal source that is applied to the input. The selection

of this function applies the appropriate correction terms

for this wavelength automatically.

This softkey is available only with an HP 70810B Option

850 lightwave section.

(lambda wavelength 1300 nm) selects 1300 nm as the

calibrated wavelength when using the OPTICAL INPUT.

3

The appropriate wavelength depends on the lightwave

signal source that is applied to the input. The selection

of this function applies the appropriate correction terms

for this wavelength automatically.

This softkey is available only with a standard HP

70810B lightwave section.

(lambda wavelength 1550 nm) selects 1550 nm as the

OPTICAL

the

using

calibrated

3

The appropriate

signal source

this

of

this

for

wavelength

that is

function applies

wavelength

when

wavelength depends

applied to

the input.

the appropriate

automatically

.

on the

The

correction

lightwave

INPUT

selection

terms

.

This

70810B

Mainframe/module

Module

latch

OPTICAL INPUT

RF INPUT

RF OUTPUT

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

ROM

VERSION

(ROM rmware version) displays the rmware version

of the lightwave section in the general information

3

annotation

softkey

lightwave

available

is

section.

only

with

standard

a

HP

interconnect

HP-IB

50-pin

The

HP-MSIB

lightwave

the

power

The

in

supply

module

a mainframe

(shipped

connector

accesses

communication

section

to

.

secures

latch

8mm

.An

mainframe) ts

the

with

the

and

buses

mainframe

the

lightwave

the

hex-ball driver

the lightwave

connects

section hex-nut latch.

Refer to Chapter 1 for lightwave section

installation and removal instructions.

The OPTICAL INPUT connector can be one of

several

Options"

types

in

listed

Chapter

as

10.

options

under

\Instrument

The RF INPUT SMA connector presents a 50 

nominal input impedance

The RF OUTPUT SMA connector

nominal output impedance

display

the

of

block

.

provides a 50 

.

.

and

kHz

40

section

Dictionary Reference

7-4

The

rmware

version

YEAR-MONTH-D

is

(yy-mm-dd).

Y

A

coded

HP

by

70810B

date:

Lightwa

e

v

Section

User's

Guide

NNNNNNNNNNNNNNNNNNNNNNN

RSPSVTY

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

select

input

x3x3x3x3x3x3x3x3x3x3x3x3x3x

SELF

TEST

3

NNNNNNNNNNNNNNNNNNNNNNN

service

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

units

menu

3

(responsivity) allows the lightwave section responsivity

to be displayed. Responsivity is a measure of the

lightwave section's voltage output per unit of optical

power input (units = volts/watt) at the RF output of

the lightwave section.

accesses the

NNNNNNNNNNNNNNNNNNNNNNN

IN 1 LW

and

NNNNNNNNNNNNNNNNNNNNNNN

IN 2W

softkeys.

3

performs a functional check of the power meter and

optical attenuator. If the self test fails, the appropriate

error messages are displayed.

If the self test fails, suspect a hardware failure. Contact

your nearest Hewlett-Packard sales and service oce.

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

ROM

(service menu) accesses the

VERSION

and

3

softkeys.

accesses the amplitude readout selections that are

available for stand-alone operation. The available

units

units

are:

amplitude

units

amplitude

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

UNITS

A

AutoMan

N

N

N

N

N

N

N

N

N

N

N

dBm

N

N

N

N

N

N

NN

N

N

N

N

N

N

WATT

readout selections

Absolute

3

dBm

att

W

x3x3x3x3x3x3x3x3x3x3x3x3x3x

SELF

TEST

3

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

CAL

USR

Off

On

displayed

3

calibration,

(user

be

to

level

specied

readout.

meter

function is

This

connector

o)

or

on

user

using

The

.

adjusted,

the

by

typically used

insertion-loss errors

allows

a

function

known

either

or to

the

input

osets

to

operate

power

the

correct

a user-dened wavelength that is not one of the

factory-calibrated wavelengths.

When the function is active, an absolute power level

oset is added to all power meter readouts.The

also

oset

returned

is

operations

aects

to

.

any power

a computer

Osets

are limited

approximately62dB

meter

during

.

information

remote-control

range

a

to

of

The user calibration function is preset o.

To enter an oset, enter the known amplitude value of

lightwave input signal, using the numeric keypad.

the

Terminate the entry with the

NNNNNN

dBm

NNNNN

NNNNNN

,

W,or

NN

NNNNNN

mW

The input value can also be modied using the

.

turn

knob

the

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

USR CAL

Off

On

function o

3

keys

495

eliminate an

o

T

4

press

INSTR

or

front-panel

the

oset,

PRESET

.

5

power

at

that

NN

softkey.

485

power

level,

and

or

70810B Lightwa

HP

e

v

Section

User's

Guide

Dictionary

Reference

7-5

NNNNNNNNNNNNNN

WATT

NNNNNNNNNNNNNN

ZERO

(watt units) selects watt units for the amplitude

readout.

(zero oset compensation) zeros the power meter.

NNNNNNNNNNNNNN

Pressing the

ZERO

softkey immediately executes a

zeroing of the osets in the internal average power

meter. The osets are primarily due to photodiode dark

current.

When the zeroing function is activated, a

ZEROING

...

message is displayed momentarily in place of the

numeric readout for the power meter. During zeroing,

the light input is blocked by the internal optical

attenuator wheel.

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

AUTZERO

See:

On Off

softkey description for additional

3

information.

Dictionary Reference

7-6

HP

70810B

Lightwa

e

v

Section

User's

Guide

Programming Commands

This chapter describes the syntax, parameters, and functions of the

commands used to operate an HP 70810B or HP 70810B Option 850

lightwave section as a stand-alone lightwave receiver.

What You'll Find in This Chapter

8

Syntax Conventions

Common

Commands

Alphabetical

Commands

Command

Functional

by

Command

Listed

::::::::::::::::::::::::::::::::::::::::::

:

:

::

::

::

::

:

:

:

:

:

:

:

:

:

:

:

:

Group

:

:

:

:

:

:

:

:

:

:

:

:

Order

:

::

::

::

::

:

:

:

:

:

:

:

:

::

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

arameters

P

Summary

in Alphabetical

page 8-2

8-5

page

:

:

:

:

:

:

:

8-7

page

:

:

:

:

:

:

:

8-8

page

:

:

:

:

:

:

:

8-10

page

:

:

:

:

:

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-1

Syntax Conventions

Pictorial Notation

Notation

ext

T

All items enclosed by an oval are literals and must be entered

exactly as shown.

Items enclosed by a rectangular box indicate parameters used in the

command sequence. A description of each parameter is given in the

respective command description.

Command sequence items are connected by lines. Each line can be

followed in only one direction, as indicated by an arrow at the end

of each line.

Any combination of command sequence items that can be generated

by following the lines in the proper direction is syntactically

correct.

A command sequence item is optional if there is a valid path around

it.

AL

CAPIT

Boldface

STYLE

TYPE

LETTERS Capital

entered

be

Boldface

must

Letters

words

key

parameters)

sequences

must

letters represent

exactly as

represent

exactly

type

this

be

using

letters

entered

(commands

to

used

shown

Items

.

be

entered

exactly

literals and

shown.

literals and

as

style

command

and

compose

in

as

shown.

indicate

command

this

shown.

are to

type

style

Command

Sequence

TYPE

typical

A

item

STYLE

command

specied

is

sequence

the

in

Letters

messages

syntax

using

that

represented

is

diagram

for

this

appear

above

each

style

type

on

The

.

respective

the

indicate

display

order of

command.

.

each

Programming Commands

8-2

HP

70810B

Lightwa

e

v

Section

User's

Guide

The \Syntax Summary" section provides a description of the syntax

elements shown in the sequence above.

Syntax Summary

command

separator

command parameter

terminator

Any valid command which is a literal and

must be entered exactly as shown.

Separators are required to separate command

sequences and command sequence items.

The separators allowed for the HP 70810B

lightwave section are as follows:

SP(space)

, (comma)

Any secondary key word recognized by the

command.

A terminator is required to end all command

sequences. The terminators allowed for a

lightwave section are as follows:

(semicolon)

;

LF(line

CR(carriage

feed)

return)

SP(space)

(comma)

,

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-3

Query Responses

Commands that set a function to a numeric value can be queried

to determine the current setting of that function. For example, the

OPTATN

The format of the query response for the

command sets the optical attenuator to a numeric value in dB.

OPTATN

command is shown

below.

Figure 8-1. Numeric Value Query Response

Other commands which control the binary state of a function can

also be queried to determine its state. Examples are commands which

acceptONand

other commands which accept

ZERO

command.

OFF

parameters such as the

AUTO

and

CALCOR

MAN

command, and

parameters such as the

The query response in these cases, as shown below, is either zero

(indicating that the queried state is o or inactive) or one (indicating

CALCOR?

the

that

return a

will

disabled,

returns

MAN?

manual

queried

zero

one

and a

one

a

operation,

state

if

if

and

on

is

optical

the

correction

if

power-meter

the

zero

a

active).

or

if

power

factors

is

it

example

an

As

error-correction

enabled.

are

zeroing

set

for

function

automatic

,

factors

query

The

set

is

zeroing.

are

ZERO

for

Figure

8-2.

Binary

State

Query

Response

Programming Commands

8-4

HP

70810B

Lightwa

e

v

Section

User's

Guide

Common Command Parameters

data byte

8-bit byte containing numeric or character data.

data byte & EOI

8-bit byte containing numeric or character data sent with

end-or-identify (EOI).

delimiter

!"$%&'/:=\@&^`|~

A character, chosen from the above list, marks the

beginning and end of a string of characters.For simplied

use, choose delimiters that are

character within the string they delimit. Otherwise,

every occurrence of the delimiter character inside the

string being delimited must be replaced with a

delimiters when forming the delimited string.

digit

0123456789

LF with EOI

Line feed (LF) with end-or-identify (EOI). ASCII code 10

(line feed) is sent with EOI control line.

number

Expressed

Range:

integer

in

+100

10

0

smallest

The

which

the

is

commands

when

units:

of

decimal,

,

through

be

may

of

range

This

.

numbers

not

exponential (E)

or

+100

+10

positive

fractional

represented

numbers

range

attached

are

the same as any

pair

number

100

0

+10

is

be

may

that

specic

to

restricted

further

is

of

form.

This

.

used

types

in

Precision:

Length:

1000

6

frequency

values

are

limited

to

GHz.

dBm

300

6

to

6

to

300 dBm

or

300 dB

values

.

amplitude

or

6

power values

dB.

300

6

limited

are

are limited

The above ranges may be further limited by

hardware. These limitations are identied

under the individual command descriptions.

approximately 15 decimal digits, unless

be

.

less

than 25

otherwise

complete

the

limited

number

hardware

by

must

characters.

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-5

Syntax Diagram:

units

The following power units are available:

dBm

watts

Programming Commands

8-6

HP

70810B

Lightwa

e

v

Section

User's

Guide

AUNITS

OPTATN

OPTPWR

RSPSVTY

CAL

CALCOR

OPTCOR

ZERO

LTWAVE

Table 8-1. Commands by Functional Group

Amplitude Commands

Amplitude units Species units for amplitude readouts.

Optical attenuator Controls the optical input attenuator.

Optical power Returns a measured value of optical power.

Responsivity Returns the overall responsivity of the

lightwave section.

Calibration Commands

Calibrate Executes power-meter correction.

Calibration correction Controls application of power-meter correction

factors.

Optical frequency response

corrections

Returns amplitude corrections for the

lightwave section.

Optical power meter zeroing Zeroes optical power meter.

Conguration Commands

Lightwave

mode

Enables

lightwave

signal

analysis

.

ERR

ID

MSG

REV

SER

TEST

USERMSG

XERR

DONE

HD

RQS

SRQ

STB

Information

Error Lists

Identication Returns

Message Returns

error

number

query

Output

Serial

Self

User

revision

number

test

message

Extended

Commands

errors

lightwave

contents

Returns

rmware

lightwave

Stores

number

and

.

Initiates

Writes

Lists

a

errors

by number

section.

returns

self-test

message

for

section

of

revision

the

routine

in

lightwave

the

only.

model

message

lightwave

.

message

the

area.

number

section.

number

.

of

section serial

area.

Input/Output Commands

Done Returns a \1" when all commands previously

entered are parsed.

Hold Blanks the readout and disables the keys until

executed.

Request

Service

Service

Request

Conditions

another

Denes

bit(s)

Sets

active

function

conditions

the

in

status

that

is

cause

byte

service

requests

to simulate

a

service request.

Status Byte Returns value of status byte

.

.

70810B Lightwa

HP

IP

e

v

Section

Instrument State Commands

Instrument Preset Sets all functions to their preset state.

User's

Guide

Programming

Commands

8-7

Table 8-2. Alphabetical Command Summary

Command Command

Description

AUNITS

CAL

Selects units for amplitude annotation and data.

Performs the lightwave section average-power

calibration routine.

CALCOR

Controls application of the average-power

correction factors.

DONE

Returns a \1" when all commands previously

entered are parsed.

ERR

HD

ID

errors

Lists

Blanks

readout

Identies

number

by

and

lightwave

only

disables

section

.

keys

by

model

number

Corresponding

Key

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

AUNITS

AutoMan

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

cal opt

power

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

USR CAL

On Off

3

3

3

|

|

4

5

HOLD

.

|

IP

LTWAVE

MSG

OPTATN

OPTCOR

OPTPWR

REV

erforms

P

Enables

Returns

lightwave

an

lightwave

contents

section

measurement

message

of

preset.

path.

area.

Controls the optical input attenuator.

Returns optical frequency response error

corrections.

Returns

measured

a

value

of

optical

power.

Returns lightwave section rmware version

number.

|

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

select

input

|

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

ATTEN

Manual

|

|

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

ROM

VERSION

3

3

3

Programming Commands

8-8

HP

70810B

Lightwa

e

v

Section

User's

Guide

Table 8-2. Alphabetical Command Summary (continued)

Command Command

Description

RQS

Dene conditions that cause a request service

condition.

RSPSVTY

SER

Returns responsivity value for the HP 70810B.

Stores and returns the lightwave section serial

number.

SRQ

STB

TEST

USERMSG

XERR

ZERO

Sets status bits to simulate a service request. |

Return value of status byte register. |

Initiates self-test routine. |

Writes a

message in

Lists errors

optical

Zero

for

power

the message

lightwave

the

meter

.

area.

section.

Corresponding

Key

|

NNNNNNNNNNNNNNNNNNNNNNN

RSPSVTY

|

|

|

x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x

AUTZERO

Off

On

N

N

3

N

N

N

N

NN

N

N

N

N

N

N

ZERO

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-9

AUNITS

Syntax

Example

Amplitude Units

OUTPUT

OUTPUT

state:

@Lws;"LTWAVE

@Lws;"AUNITS

Preset

Species units for amplitude readouts.

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

::

::

::

:

:

:

:

:

:

:

:

:

:

:

:

lightwave

ON;"

W;"

Select

Display

.

units

optical

dBm

:

:

:

:

:

:

:

:

::

::

::

::

:

:

:

.

mode

signals in

watt

Description

Query Response

AUNITS

The

displayed

AUNITS

lightwave

on

command

section

default-units

command

display

the

also

commands

path).

changes

screen

the

or

determines

when

of

units

returned

amplitude

the

units

no

amplitude

the

the

to

are

controller

assumed

units

explicitly

readouts

The

.

for

(the

given

Programming Commands

8-10

HP

70810B

Lightwa

e

v

Section

User's

Guide

CAL

CAL

Syntax

Calibrate

vailable

A

*

vailable

A

y

Executes the optical power correction routine.

70810B

only

only

for

for

use

use

with

with

standard

a

HP

an

HP

70810B

Option

.

850.

Example

Description

Related

command:

OUTPUT @Lws;"CAL

command

CAL

The

compensate

for

:

PRESET

applies

responsivity

1550;"

appropriate

the

variations

Selects

tions

1550

amplitude

the

in

preset

for

nm.

correction

lightwave

error

wavelength

a

section

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

:

circuitry.

The functions that can be executed individually are:

CAL OPTPWR

corrects the power meter, if possible, to display the

power level requested by the user. Approximate adjustment range

lightwave

(A

.

dB

2

6

is

used.)

OPTPWR

CAL

CAL PRESET

is

applies factory-determined corrections for

operating wavelengths

signal

, 1300 nm or 1550

70810B, or 850 nm for an HP 70810B

calibration

Option 850. The preset state

for this function is 1300 nm, or 850 nm with

This command automatically

turns o user-supplied optical power

corrections that have been enabled with the

disable

CALCOR

the

Use

correction

factor

command

.

to

enable

or

source is

required

nm for a standard HP

an Option 850.

CAL OPTPWR

optical

the

when

one of the

command.

power

CALCOR

correc-

of

that

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-11

CALCOR

Syntax

Calibration correction factor

Controls application of the optical

power correction factor.

Example

Description

Preset state:

Related

Disable

the

OUTPUT

::

command:

optical

power

@Lws;"CALCOR

::

::

::

::

:

:

:

:

correction factor

OPTPWR,OFF;"

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

.

Turn

CALCOR

:

:

:

:

:

:

::

::

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

rection

equest

R

factor

Query the

status

of

OUTPUT @Lws;"CALCOR

the

optical

OPTPWR,?;"

power

correction

power correction

ENTER

@Lws;A

Enter

into a variable.

The

CALCOR

power correction factor used by the

CALCOR

command enables and disables the user-supplied optical

CAL

command.

OPTPWR,

OFF

disables

user-supplied

the

optical

correction.

During normal operation, the correction factors for

are o. Set the command to on when you

optical power calibration factors

.

wish to use your own

OPTPWR,

:

:

:

:

:

:

:

:

:

::

::

::

o

factor

optical

power cor-

.

.

optical

status

of

factor.

returned status

power

CALCOR OPTPWR

OFF

CAL

:

:

value

Programming Commands

8-12

HP

70810B

Lightwa

e

v

Section

User's

Guide

DONE

DONE

Syntax

Example

Done

Use

DONE

previous

OUTPUT

ENTER

Returns a \1" to the computer when all prior commands

are complete.

to delay the execution of subsequent commands until all

commands have

@Lws;"DONE?;"

@Lws;A

been executed.

eturn a

R

ssign

have been

\1"

mands

A

\1" when

executed.

computer

to

the

variable

previous

com-

.

Description

Query

Response

DONE

The

commands

example

or

F

operation

commands

command

encountered

when

,

computer

the

of

been

have

returns

before

DONE?

executed.

\1" to

a

the

executed,

is

program

computer

the

command have

DONE

user

the

suspended

is

when

assured

is

until

of

all

executed.

the

previous

all

the

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-13

ERR

Syntax

Error

Returns codes of reported errors.

Example

Description

Interdependent command:

command

ERR

the

Use

to

::::::: :::::::IPclears the error register.

report

lightwave

section

errors

to

the

computer.

CLEAR @Lws

OUTPUT

ALLOCATE

OUTPUT

@Lws;"IP;";

Error_numbers$[50]

@Lws;"SAVES

OUTPUT @Lws;"ERR?;"

@Lws;Error_numbers$

command returns numeric error codes, if any have occurred.

The

ENTER

ERR

1;VIEW;"

Initialize

the

eturn

50-element

for

lightwave

two

lightwave

lightwave

to the

error

.

Create

puter

turned

Send

to

R

codes

Store

array

analyzer

the

unrecognized

computer

codes

.

array

storage

section

section.

section

in

in

any

of

errors

commands

error

.

computer

Refer to Chapter 9 for a description of each returned error message.

Error codes are stored in the error register as they occur.

none are

If

codes

returns

as

long

\0"

as

(zero).

are

they

Instrument

in

the

register

preset

.

clears

)

IP

(

the

ERR

present,

register.

error

returns

ERR

com-

re-

.

Query Response

Programming Commands

8-14

HP

70810B

Lightwa

e

v

Section

User's

Guide

HD

HD

Syntax

Example

Hold

Blanks the active function and disables the front-panel

knob, step keys, and numeric keypad.

command

HD

the

Use

CLEAR

@Lws

OUTPUT @Lws;"IP;";

OUTPUT

OUTPUT

OUTPUT

@Lws;"CF

@Lws;"WAIT

@Lws;"HD;"

blank

to

1GHZ;"

4S;"

the

active

function

Initialize

center

Set

active

the

graticule)

of

quency

4

ait

W

Blank

active

analyzer

frequency

function

value

seconds

readout.

.

displays

.

.

function

Notice

.

area

center

the

readout.

(left

that

side

fre-

Description

Query Response

command

HD

The

front-panel

function is

blanks

numeric

executed.

the

keypad,

active

step

function

keys

,

and

readout

,

knob

until

and

another

disables

active

the

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-15

ID

Syntax

Identication

Returns the lightwave section model number.

Query

Example

Response

OUTPUT @Lws;"ID?;"

ENTER

@Lws;N$

Return lightwave section model number.

Enter

variable

a

lightwave

.

section

model

number

into

Programming Commands

8-16

HP

70810B

Lightwa

e

v

Section

User's

Guide

IP

IP

Syntax

Example

Description

Instrument preset

Sets all functions to their preset state.

Preset the HP 70810B lightwave section.

OUTPUT

The

place

able

T

by

o

IP

@Lws;"IP;"

command presets

70810B

HP

the

8-3

the

shows

the

instrument

the lightwave

known

a

in

command

preset

state

functions

command,

.

section

that

.

IP

settings

are

.

executed

Use

or

to

IP

turned

Instrument

8-3.

able

T

Programming

Aected

or

Command

AT

AUNITS

CAL

Commands

Instrument

by

Preset

AT

State/Response

0DB

AUNITS

Preset

1300

DBM

CALCOR CALCOR OPTPWR OFF

ERR

Clear error register

HD HD

MSG

Blank message

ZERO ZERO AUTO

RQS

aect

not

does

)

IP

preset

(

Executed

Preset

(850)

,

,

REV

SER

,

SRQ

,

or

USRMSG

.

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-17

LTWAVE

Syntax

Lightwave mode

Enables lightwave or RF bypass mode.

Example

Description

Preset state:

Related command:

OUTPUT

OUTPUT

LTWAVE

The

.

mode

processed

When

electrical

directly

eectively

@Lws;"LTWAVE

@Lws;"LTWAVE

function

LTWAVE

With

a

as

LTWAVE

signals

the

to

bypassed

OFF

:::::: ::::::::: ::::::: ::::::::: :::::: :

::

::

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

::

RF

RF

ON

signal

is

the

at

output

ON;"

OFF;"

selects

signals

,

and

selected,

INPUT

RF

port.

case

this

in

either

at

sent

RF

The

.

lightwave

the optical

the RF

to

bypass

port

HP

output

mode

the

of

70810B

Species

Species

mode

input

is

HP

Not aected by

:

:

:

:

:

:

:

:

::

lightwave

RF

RF bypass

or

demodulated,

are

port.

activated

70810B

lightwave

:

:

:

:

:

:

bypass

and

passed

are

section

AUNITS

:

mode

mode

is

IP

.

.

Programming Commands

8-18

HP

70810B

Lightwa

e

v

Section

User's

Guide

MSG

MSG

Syntax

Example

OUTPUT @Lws;"MSG?;"

ALLOCATE

ENTER

Message$[40]

USING

@Lws

"-K";Cal,Cor,Message$

PRINT

PRINT

THEN

Cal

IF

Cor THEN

IF

PRINT

Message$[3]

PRINT

Message

Interdependent

Return the

"uncalibrated"

"uncorrected"

Returns characters contained in the message area on

the HP 70810B display.

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

::

::

:

:

:

:

the

on

message

messages

HP

string.)

the

string,

lightwave

the

to

to

ASIC

(string)

two

code

array

B

beginning

section

computer

for

Boolean

image

for

the

with

display

.

storage

variables

0

,

third

message

eturn

R

Create

message

ssign

A

string.

feeds

Print

command:

shown

the

computer

.

the

(The

into

the

:

USERMSG

::

::

.

character

of

and one

enters

K,

character

line

.

70810B Lightwa

HP

Description

Guide

User's

Section

e

v

The

MSG

command returns the characters shown in the message area

on the display, and also returns the

UNCAL

and

UNCOR

messages if

they are displayed. Whenever a message is in the message area, the

Message

bit of the status byte is set true.

Programming

Commands

8-19

MSG

Query Response

Programming Commands

8-20

HP

70810B

Lightwa

e

v

Section

User's

Guide

OPTATN

OPTATN

Syntax

Example

Optical attenuator

Preset state:

Range:

to 28

0

to 30

0

optical attenuator

the

Set

dB (optical)

dB (optical)

::::::: ::::::::: :::::: ::::::::: ::::::: ::::::::: ::::::

:

:

:

:

:

:

:

:

Controls the optical input attenuator.

steps

steps

1300 nm,

.

.

:

:

:

:

:

:

at 1550

at

0to

:

850

for

30 dB

nm,

nm,

dB

6

(optical) at

dB

1

in

dB

1

in

attenuation.

of

in

0dB

.

steps

dB

1

Description

Query Response

OUTPUT

OPTATN

The

70810B

HP

passes

through

photodiode

the average

the RF

output port.

@Lws;"OPTATN

command

lightwave

a

This attenuator

.

controls

section.

variable

optical power

6DB;"

the

The

attenuator

is used

meter and

optical

optical

before

increase

to

to control

input

input

being

attenuator

HP

the

of

applied

dynamic

the

signal

RF

the

the

in

70810B

the

to

range

level

PIN

of

at

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-21

OPTCOR

Syntax

Example

Optical frequency response corrections

Restrictions:

OUTPUT

@Lws;"OPTCOR 1?;"

:

for

sk

A

arameters

P

::

::

::

::

:

:

:

:

:

:

:

:

:

:

points

ENTER

@Lws;Npts

ALLOCATE

ENTER

@Lws;Optcor(*)

Optcor(1:Npts,1:2)

Get number

Allocate

ead

R

Returns amplitude

corrections for the

HP 70810B.

are

4

and

3

rmware

with

lightwave

section

.

to

pairs

of

hold

array

frequency/amplitude

all

to

not

dated

correction

follow

rest

available

880808.

.

data.

of

pairs

.

Description

are

There

(optical

or RF

section.

frequency

factory-stored

input

The data

value

is

returned

RF

to

stored

the

values

for

the

output)

in

(in

of

frequency-amplitude

a correction

Hz),

overall

70810B

HP

frequency

pairs

in electrical

response

lightwave

or

F

.

dB to

each

the

responsivity of the lightwave section is given.

Since the values returned by

OPTCOR

are corrections, they should be

added to signal measurements, or subtracted from the responsivity.

For example,if

OPTCOR

the

is

GHz

3.6

value

dB

6

RSPSVTY?

3.6

for

below

800,

returns a value of 800 (volts per watt), and

GHz

or

is

400

6

,then

dB

volts per

the

watt.

actual

responsivity

Parameter Data Returned

OPTCOR 1?

returns HP 70810B lightwave path (lightwave input to

RF output) correction data.

OPTCOR 2?

returns lightwave path correction data for the

calibrated system option. This data applies to the

combination of an HP 70810B with a specic RF or

microwave input lightwave section.

OPTCOR

3?

returns

RF

to

correction

output)

in

the

data

HP

the

for

70810B

bypass

.

path (RF

input

at

Programming Commands

8-22

HP

70810B

Lightwa

e

v

Section

User's

Guide

OPTCOR

Note

Query Response

OPTCOR 4?

Data received is not valid if correction data is requested for the

calibrated system option (parameter values of 2 or 4) from a lightwave

section without that option.

returns bypass path correction data for the calibrated

system option.

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-23

OPTPWR

Syntax

Optical power

Returns a measured value of optical power.

Example

Description

Related commands:

display

and

Read

OUTPUT

ENTER

OPTPWR

The

power

70810B

HP

measurement

trigger

@Lws;"OPTPWR?;"

@Lws;Optpwr

command

Optical

.

lightwave section,

to

commands

power

::::: ::::::::: ::::::: ::::

optical

power

returns

a

measurements

and

be completed

have no

after

eect on

from the

for

sk

A

reply

ead

R

measured

are

command

this

receipt

the

CAL OPTPWR,CAL PRESET

HP 70810B

optical

from

value

made

of

of

rate

.

70810B

HP

average

reading.

power

of

continuously

returns

the

the

request.

the

optical

.

optical

by

rst

HP-IB

power

measurement.

the

300

If

make an

to

dBm

is returned.

Power

is returned

signal-to-noise

accurate

measurement,

in current

ratio

at

photodiode

the

then

AUNITS

power

a

(watts

insucient

is

level

or

of

dBm).

0

This can often be remedied by decreasing the optical attenuation

(

OPTATN

), which will result in more light at the photodiode.

If the optical power meter is overranged (too much light input),

an inaccurate reading will result. The overrange bit in the status

condition.

to

.

cause

This

this

RQS

an

situation

on HP-IB

be

can

STB?

(

byte

request

service

whenever

remedied

indicate

serial

or

,

mask (

power meter

the

poll

RQS

on

)

HP-IB)

can

goes

will

be

also

overrange

set

by increasing the optical attenuation.

the

The

Programming Commands

8-24

Note

Be sure

to select the correct operating wavelength with

before making any optical power measurement.

70810B

HP

Lightwa

CALPRESET

Section

e

v

User's

Guide

REV

REV

Syntax

Example

Description

Firmware revision

Use the

lightwave

REV

OUTPUT

command to nd out the rmware version of the

section.

@Lws;"REV?;"

ENTER @Lws;N

command

REV

The

rmware

(ROM).

year|month|day

The

.

Returns the lightwave section rmware date

code.

rmware version

computer

to

value

70810B

HP

the

of

date:

by

returns

revision

the

eturn

R

Assign

revision

number

lightwave

rmware

date

coded

is

to comput

variable

.

Query

Response

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-25

RQS

Syntax

Request service conditions

:

:

:

:

:

:

:

:

:

:

:

::

::

Range:

Related

::

:

commands:

::

::

:

Denes conditions that cause service

requests.

Integers

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

::

::

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

to 255

0

,

STB

,

SRQ

:

:

:

:

Example

Description

programming

or

F

RQS

allowed

be

bit

4.

command

mask

whether

6

Chapter

The

request

will

indicates

such,

\Monitoring

examples

determines

to

service

the

in

System

species

which

generate

a

not

or

request

Operation"

refer

,

service

the

service

a

service

in

\Monitoring

to

in

bits

request.

request

mask has

Chapter

request

status

the

Bit

being

is

no signicance

for

4

System

mask

byte

6in

Operation"

The

.

of the

the status

generated and,

. Refer

information

more

service

analyzer

in

byte

as

to

(including a discussion on condition bits and event bits). The service

request mask is cleared (set to 0) when the lightwave section is turned

on, and also when the lightwave section receives a \device clear"

(HP BASIC CLEAR statement) on HP-IB.Table 8-4 describes the bit

assignments within the service request mask.

Programming Commands

8-26

HP

70810B

Lightwa

e

v

Section

User's

Guide

Table 8-4. Lightwave Section Status Byte

RQS

Bit

Number

Decimal

Equivalent

Analyzer State Description Bit

7 128 OUT OF RANGE Optical power is out of range for

optical average power meter (too low

or too high).

6 64 RQS Set when service request is being

generated.

5 32 ERROR-PRESENT Set when error register contains an

error.

4 16 COMMAND-COMPLETE Set at completion of command

execution.

3 8 ZEROING Optical power meter is executing its

zeroing function.

2 4 Not used

1 2 MESSA

0 1 Not

used

GE

when

Set

display

messages

message

appear

area.

in

the

Type

event

|

condition

event

condition

condition

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-27

RSPSVTY

Syntax

Responsivity

Returns the overall responsivity of the HP 70810B.

Example

Description

Restrictions:

OUTPUT

ENTER

command

This

70810B's

responsivity values

The

RF output

the

aect

@Lws;"RSPSVTY?;"

@Lws;Rsp

overall responsivity

responsivity.

:::::: :::

used

is

the

of

Available only in lightwave mode (

lightwave

in

mode

LTWAVE

(

.

the

optical

from

attenuator

indicate

HP

70810B

conversion

The

.

ON

to

)

optical

LTWAVE ON

query

input

setting

the

will

)

HP

to

Programming Commands

8-28

HP

70810B

Lightwa

e

v

Section

User's

Guide

SER

SER

Syntax

Serial number

Stores and returns the instrument serial number.

Example

Description

Query Response

characters

21

Range:

Maximum

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

:

:

:

:

:

:

:

:

:

of

DIM SER$[21]

OUTPUT @Lws;"SER$Your

#1 Analyzer$;"

OUTPUT @Lws;"SER?;"

ENTER @Lws;Ser$

The

SER

command stores the serial number of the lightwave section

in memory. SER may be used to return the stored number to the

computer. This is originally the ten-character serial number assigned

to the lightwave section by Hewlett-Packard. This serial number may

be loaded with whatever data is convenient.

the HP

If

used

70810B

determine

to

is

if

part

valid

a

of

system

calibrated

calibration

system,

is

serial

this

available

number

.

is

70810B Lightwa

HP

e

v

Section

User's

Guide

Programming

Commands

8-29

SRQ

Syntax

Description

Service request

:

:

:

:

:

:

Range:

The

status byte

:

command simulates

SRQ

.Use

containing service

subroutine

a

branched

detected.

section

to

Instead

errors

execute

,

Sets bit(s) in the status byte to simulate a service

request.

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

::

::

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

::

::

::

bits

of

program

your

error

lightwave

condition.

programs

SRQ

the

requests.

testing

of

service

command

F

whenever

the

32

SRQ

example

or

program

simulate

to

requests

test

to

,

lightwave

a

by

operation

the

suppose

initiating

by

error

an

setting

section

:

in

:

:

was

to 255

0

the

descriptions

the

See

\Monitoring

System

RQS

the

for

Operation"

and

Chapter

in

commands

STB

4.

See also

.

Programming Commands

8-30

HP

70810B

Lightwa

e

v

Section

User's

Guide