Agilent 8153A Programming Manual

Errata

8153A Lightwave Multimeter Operating and Programming Manual

08153-90011

September 1, 1999

Title & Document Type:

Manual Part Number:

Revision Date:

HP References in this Manual

This manual may contain references to HP or Hewlett-Packard. Please note that Hewlett­Packard's former test and measurement, semiconductor products and chemical analysis
businesses are now part of Agilent Technologies. We have made no changes to this
manual copy. The HP XXXX referred to in this document is now the Agilent XXXX.
For example, model number HP8648A is now model number Agilent 8648A.

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Operating and Programming Manual

HP 8153A Lightwave Multimeter

SERIAL NUMBERS

This manual applies to all instruments with Serial No. 2946G00476 and higher.

ABCDE

HP Part No. 08153-90011

Printed in Germany

Third Edition

E0199

This document contains proprietary

information which is protected by

copyright. All rights are reserved.

No part of this document may be

photocopied, reproduced, or

translated to another language

without the prior written consent of

Hewlett-Packard GmbH.

c



Copyright 1999 by:

Hewlett-Packard GmbH

Herrenberger Str. 130

7030 Boeblingen

Germany

Subject Matter

The information in this document is

subject to change without notice.

Hewlett-Packard makes no warranty

of any kind with regard to this

printed 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.

Printing History

New editions are complete revisions

of the manual. Update packages,

contain additional and replacement

information to be incorporated into

the manual by the customer. The

date on the title page only changes

when a new manual is published.

When an edition is reprinted, all the

prior updates to the edition are

incorporated.

Notices

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, HP 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 HP. Buyer shall

prepay shipping charges to HP and

HP shall pay shipping charges to

return the product to Buyer.

However, Buyer shall pay all shipping

charges, duties, and taxes for

products returned to HP from

another country.

HP warrants that its software and

rmware designated by HP for use

with an instrument will execute its

programming instructions when

properly installed on that instrument.

HP does not warrant that the

operation of the instrument,

software, or rmware will be

uninterrupted or error free.

Limitation of Warranty

The foregoing warranty shall not

apply to defects resulting from

improper or inadequate maintenance

by Buyer, Buyer-supplied software or

interfacing, unauthorized

modication or misuse, operation

outside of the environmental

specications for the product, or

improper site preparation or

maintenance.

No other warranty is expressed or

implied. Hewlett-Packard specically

disclaims the implied warranties of

Merchantability and Fitness for a

Particular Purpose.

Exclusive Remedies

The remedies provided herein are

Buyer's sole and exclusive remedies.

Hewlett-Packard shall not be liable

for any direct, indirect, special,

incidental, or consequential

damages whether based on contract,

tort, or any other legal theory.

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.Addresses are provided at

the back of this manual.

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, NIST (formerly the

United States National Bureau of

Standards, NBS) to the extent

allowed by the Institutes's

calibration facility, and to the

calibration facilities of other

International Standards Organization

members.

Control Serial Number

First Edition applies directly to all

instruments.

First Edition : E0590

Second Edition : E1191, E0492,

E1192, E1293

Third Edition : E1094, E0796, E0199

Safety Considerations

The Model HP 8153A is a Class 1 instrument (that is

, an instrument with an

exposed metal chassis directly connected to earth via the power supply cable).

The symbol used to show a protective earth terminal in the instrument is

.

Before operation, you should review the instrument and manual, including the

red safety page, for safety markings and instructions.You must follow these to

ensure safe operation and to maintain the instrument in safe condition.

Some HP 8153A circuits are powered whenever the instrument is connected to

the AC power source.To disconnect from the line power, disconnect the power

cord either at the rear power-inlet or at the AC line-power source (receptacle).

One of these must always be accessible. If the instrument is in a cabinet, it must

be disconnected from the line power by the system's line-power switch.

Warning

To avoid hazardous electrical shock, do not perform

electrical tests when there are signs of shipping damage to

any portion of the outer enclosure (covers, panels, etc.).

Line Power Requirements

The HP 8153A can operate from any single-phase A

C power source that supplies

between 100V and 240V at a frequency in the range from 40 to 60Hz. The

maximum power consumption is 55VA with all options installed.

The fuse used by this instrument is T1A / 250V (slow) (HP Part No. 2110-0007).

Changing the fuse should be carried out only by a qualied electrician or by HP

service personnel as it is necessary to open the instrument.

Line Power Cable

In accordance with international safety standards, this instrument has

a three-wire power cable. When connected to an appropriate AC power

receptacle, this cable earths the instrument cabinet. The type of power cable

shipped with each instrument depends on the country of destination. Refer to

Figure 0-1 for the part numbers of the power cables available.

iii

Figure 0-1. Line Power Cables - Plug Identication

Warning

To avoid the possibility of injury or death, you must

observe the following precautions before switching on the

instrument.

If this instrument is to be energized via an

autotransformer for voltage reduction, ensure that the

Common terminal connects to the earthed pole of the

power source.

Insert the power cable plug only into a socket outlet

provided with a protective earth contact. Do not negate

this protective action by the using an extension cord

without a protective conductor.

Before switching on the instrument, the protective

earth terminal of the instrument must be connected to a

protective conductor.You can do this by using the power

cord supplied with the instrument.

It is prohibited to interrupt the protective earth

connection intentionally.

iv

The following work should be carried out by a qualied electrician, and all local

electrical codes must be strictly observed. If the plug on the cable does not t

the power outlet, or if the cable is to be attached to a terminal block, cut the

cable at the plug end and rewire it.

The color coding used in the cable depends on the cable supplied. If you are

connecting a new plug, it should meet the local safety requirements and include

the following features:

Adequate load-carrying capacity (see table of specications).

Ground connection.

Cable clamp.

Operating Environment

Warning

Input/Output Signals

Caution

The HP 8153A is not designed for outdoor use.To prevent

potential re or shock hazard, do not expose the HP 8153A

to rain or other excessive moisture.

A maximum of 15V can be applied as an external voltage to any

of the BNC connectors.

v

Initial Safety Information for Laser Source Modules

The Specications for these modules are as follows:

HP 81551MM HP 81552SM HP 81553SM HP 81554SM

Laser Type

FP-Laser FP-Laser FP-Laser Dual FP-Laser

InGaAsP InGaAsP InGaAsP InGaAsP

Laser Class

According to IEC 825 3A 3A 3A 3A

(Europe)

According to 21 CFR 1040.10 1 1 1 1

(Canada, Japan, USA)

Output Power

Beam Diameter

Numerical Aperture

Wavelength

>

-2dBm

>

0dBm

>

0dBm

>

-1dBm

50m 9m 9m 9m

0.2 0.1 0.1 0.1

850610nm 1310620nm 1550620nm 1310/1550620nm

Note

Note

vi

Canada, Japan, USA

The laser safety warning labels are xed on the laser module.

Europe

A sheet of laser safety warning labels are included with the

laser module.You

MUST

stick the labels in the local language

onto the outside of the mainframe, in a position where they are

clearly visible to anyone using the instrument.

You

MUST

Center for repair and calibration.

The laser module has built in safety circuitry that will disable the optical output

in the case of a fault condition.

return instruments with malfunctioning laser boxes to a HP Service

Warning

Warning

Warning

Warning

Use of controls or adjustments or performance of

procedures other than those specied for the laser source

may result in hazardous radiation exposure.

Refer Servicing only to qualied and authorized personnel.

Do not enable the laser when there is no ber attached to

the optical output connector.

The optical output connector is at the bottom, on the laser

module front panel.

The laser is enabled by pressing the grey button above the

optical output connector on the front panel. The laser is

enabled when the green LED on the front panel of the laser

module is lit.

Under no circumstances look into the end of an optical

cable attached to the optical output when the device is

operational.

The laser radiation is not visible to the human eye, but it

can seriously damage your eyesight.

vii

Sicherheitsinformation fur Laser Quellen

Die Spezikationen f ur die Lasereinsch ube sind wie folgt:

HP 81551MM HP 81552SM HP 81553SM HP 81554SM

Laser Typ

FP-Laser FP-Laser FP-Laser Dual FP-Laser

InGaAsP InGaAsP InGaAsP InGaAsP

Laser Klasse

Entsprechend IEC 825 3A 3A 3A 3A

(Europa)

Ausgangsleistung

Strahldurchmesser

Numerische Apertur



Wellenl

ange

>

-2dBm

>

0dBm

>

0dBm

>

-1dBm

50m 9m 9m 9m

0.2 0.1 0.1 0.1

850610nm 1310620nm 1550620nm 1310/1550620nm

Hinweis

Europa

Ein Blatt mit Laser Warnaufklebern ist jedem Lasereinschub

beigef ugt. Die Aufkleber m ussen in der Landessprache,fur den

Anwender gut sichtbar, an der Aussenseite des Grundger ates

angebracht werden.

Defekte Lasereinsch ube m ussen zur Reparatur oder zur Kalibration an ein HP

Service B uro geschickt werden.

Der Lasereinschub hat eine eingebaute Sicherheitsschaltung die den

Laserausgang im Falle einer St orung abschaltet.

viii

Warnung

Bedienung, Abgleicharbeiten oder die Durchfuhrung von

Tests, die nicht im Handbuch angegeben sind, konnen zum

Austritt gefahrlicher Strahlung fuhren.

Warnung

Warnung

Warnung

Reparaturarbeiten durfen nur von qualiziertem und

bevollmachtigtem Personal durchgefuhrt werden.

Laser nicht ohne angeschlossenen Glasfaserkabel

einschalten.

Der optische Ausgang bendet sich am unteren Teil der

Einschubfrontplatte. Mit dem daruberliegenden grauen

Druckschalter wird der Laser ein- bzw. ausgeschaltet. Bei

eingeschaltetem Laser leuchtet eine grune Anzeige an der

Frontplatte des Einschubes.

Wenn der Laser eingeschaltet ist, darf unter keinen

Umstanden in das Ende des optischen Kabels oder in den

Laserausgang am Gerat geschaut werden.

Der Laserstrahl ist fur das menschliche Auge unsichtbar,

kann aber das Sehvermogen ernsthaft verletzen.

ix

Informations et Consignes de Securite Relativesa l'Utilisation

des Lasers.

Les Sp ecications des Modules Laser sont les Suivantes:

HP 81551MM HP 81552SM HP 81553SM HP 81554SM

Type de Laser

FP-Laser FP-Laser FP-Laser Dual FP-Laser

InGaAsP InGaAsP InGaAsP InGaAsP

Classe du Laser

Conforme au STD IEC 825 3A 3A 3A 3A

(Europe)

Conforme au STD CFR 1040.10 1 1 1 1

(Canada, Japan, USA)

Puissance de Sortie

Diam^etre du Faisceau

Ouverture Numerique

Longueur d'Onde

>

-2dBm

>

0dBm

>

0dBm

>

-1dBm

50m 9m 9m 9m

0.2 0.1 0.1 0.1

850610nm 1310620nm 1550620nm 1310/1550620nm

Remarque

Remarque

x

Canada, Japan, USA

Les etiquettes de s ecurit e sont ach ees sur le module laser.

Europe

Les etiquettes de s ecurit e sont incluses dans le module laser.

Il est obligatoire de coller une etiquette en langage local a

l' exterieur de l'appareil de telle sorte qu'elle soit parfaitement

visible par l'utilisateur.

Il est obligatoire de retourner tout appareil pr 

de fonctionnement du laser uniquement 

esentant un d efaut

a un centre de r eparation

Hewlett-Packard.

Le module laser comporte un syst eme de s ecurit e mettant hors service la sortie

optique en cas de malfonctionnement du laser.

Attention

L'utilisation du laser en dehors de ses limites de

performances et des procedures denies par HP peut

conduirea une exposition dangereuse de l'utilisateur aux

radiations.

Attention

Seul le personnel autorise par HP est qualie pour

intervenir sur le laser.

Attention

Ne pas mettre le laser sous tension sans s'^etre assure

qu'une bre optique est bien xee sur le connecteur.

Le connecteur de sortie optique est situe au bas de la face

avant du module laser.

La mise en service du laser s'eectue par la pression du

bouton gris situe au dessus de la sortie optique en face

avant du module. L'illumination de la LED verte indique que

le laser est en activite.

Attention

En aucun cas ne tenter de regarder l'extremite de la bre

optique attachee au connecteur lorsque le laser est en

activite.

Bien que la lumiereemise par le laser ne soit pas visible elle

peut cependant^etre dangereuse pour la vue.

xi

Lasersakerhet

Till HP 8153A optiska m atsystem kan man installera en lasermodul. P adetta

vis kan HP 8153A optiska m atsystem ocks a vara en laserapparat, som d a

klassiceras till laserklass 3A.

I Finland har apparatens lasers akerhet inspekterats av Institutet f or

Arbetshygien och typgodk ants av Arbetsskydstyrelsen. Vid inspektionen har

apparaten klassicerats enligt de best ammelser som anges i statsr adets beslut Nr.

472/1985 och standard SFS-IEC 825.

Om man till HP 8153A m atsystem har anlagt en lasermodul eller om man senare

installerar en lasermodul, m aste till apparaten bifogas varningsskyltar enligt

standard SFS-IEC 825:

Bruksanvisningar

Varning

Vid anv andingen av apparaten b or f oljande varningsanvisningar efterf oljas, som

pa detta s att garanterar s akerhet.

Aktivera ej lasern, om inte den optiska kapeln ar kopplad till str al oppningen.

Laserstr alen aktiveras genom att trycka p a den gr aa knoppen ovanf or

str al oppningen. D arefter informerar den gr ona indikationslampan om att

lasern ar i funktion.

xii

Om apparaten anvands pa annat sattan vad i

bruksanvisningar specicerats, kan anvandaren utsattas for

osynlig laserstralning av laserklass 3A.

Titta aldrig in i den till str al oppningen kopplade optiska kabeln eller berns

losa del, n ar lasern ar i funktion.

Underhall

I apparaten nns ej s adana delar, som anv andaren kan underh alla. N ar man

uppt acker att fel i apparaten har uppst att eller att apparaten ej fungerar

felfritt, b or apparaten s andas till HP:s verkstad f or reparering och service.

I lasermodulen nns en inbyggd s akerhetskrets, som s atter laserstr alningen ur

funktion n ar fel uppst ar i apparaten.

xiii

Laserturvallisuus

HP 8153A optiseen yleismittariin voidaan asentaa pistoyksikk on a laserl ahde.

Tall oin HP 8153A optinen yleismittari toimii laserlaitteena joka kuuluu

turvalisuusluokkaan 3A.

Laitteen on tarkastanut Suomessa laserturvallisuuden osalta Ty oterveyslaitos ja

tyypihyv aksynyt Ty osuojeluhallitus.Tarkastuksessa laitteen turvallisuusluokka

on m aaritetty valtioneuvoston p aat oksen N:o 472/1985 ja standardin SFS-IEC

825 mukaisesti.

Mik ali HP 8153A mittauslaitteeseenne on asennettu laserl ahde tai siihen

my ohemmin asennetaan em. laserl ahde, laite on varustettava laserl ahteen

mukana toimitettavilla, standardin SFS-IEC 825 mukaisilla varoitusmerkinn oill a:

Kaytto

Varoitus

Kaytt aess asi laitetta noudata seuraavia varo-ohjeita, jotka takaavat laitteen

turvallisen k ayt on:

al a aktivoi lasers adett a, ellei optinen kaapeli ole kytkettyn asateen

ulostuloliittimeen. Lasers ade aktivoidaan painamalla ulostuloliittimen

yl apuolelle sijoitettua harmaata kytkint a. T all oin vihre a merkkivalo ilmaisee

lasers ateen toimivan.

xiv

Laitteen kayttaminen muulla kuin kayttoohjeesa mainitulla

tavalla saattaa altistaa kayttajan luokan 3A nakymattomalle

lasersateilylle.

al a koskaan katso ulostuloliittimeen kytketyn optisen kaapelin tai kuidun

sis aan sen vapaana olevasta p aast a, kun laite on toiminnassa.

Huolto

Laitteessa ei ole k aytt aj an huollettavissa olevia kohteita. Laite tulee l ahett aa

korjattavaksi ja huollettavaksi HP:n huoltokorjaamoon, mik ali laite vikaantuu

tai sen havaitaan toimivan virheellisesti.

Laserl ahteess aonmyos sis aanrakennettu turvapiiri, joka est aa lasers ateen

toiminnan laitteen vikaantuessa.

xv

Introduction

This manual is arranged into four categories:

Getting Started

Descriptions of operating principles, to make you familiar with the

instrument. Chapter 1.

Quick Reference Guide

Local control and remote control programming information. Chapters 2, 3, 4,

5, 6, 7, 8, and 9.

Reference Data

Supporting information of a non-operational nature. Appendix A, B,C,D,E,

F, G, H, and I.

Customer Assistance

Sales and Service information. Appendix J.

xvi

Contents

1. Getting Started

The HP 8153A System ..................... 1-1

A Quick Overview . . . . . . . . . . . . . . . . . . . . . . . 1-2

The Keyboard . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Measure Mode . . . . . . . . . . . . . . . . . . . . . . . 1-2

Menu Mode ...... ...... ....... ..... 1-3

The Display . . . . . . . . . . . . . . . . . . . . . . . . .

A Sample Session ...... ...... ........ ... 1-8

Hardware Setup . . . . . . . . . . . . . . . . . . . . . . .

Switching On and Recalling the Standard Setting ....... 1-8

Making A Power Measurement ................ 1-9

Logging Data .. ...... ........ ...... .. 1-11

Examining the Data .. ...... ........ ..... 1-12

Plotting Data ........................ 1-13

2. Measure Mode

The Chan Key . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

The Mode Key . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

The Param Key ...... ...... ...... ...... 2-2

Entry Status . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Default Values . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Parameter List . . . . . . . . . . . . . . . . . . . . . . . . 2-2



...... ...... ........ ..... .... 2-2

CAL ........ ...... ....... ...... 2-3

T............................. 2-3

REF............................ 2-5

ATT...... ...... ....... ...... ... 2-6

AUX ........................... 2-7

The Disp!RefKey....................... 2-7

ThedBKey .. ........ ...... ..... ..... 2-8

Using

4dB5

with a Two Sensor Instrument ........... 2-8

Using

4dB5

with a One Sensor Instrument ...... ..... 2-9

1-6

1-8

Contents-1

The dBm/W Key . . . . . . . . . . . . . . . . . . . . . . . . 2-9

The Zero Key ......................... 2-9

TheNDigKey......................... 2-11

The Range Keys . . . . . . . . . . . . . . . . . . . . . . . . 2-11

The AutoKey ........................ 2-13

TheUpKey......................... 2-13

The Down Key ....................... 2-13

The Analog Output ..................... 2-13

The Modify Keys . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Editing Discrete Valued Parameters . . . . . . . . . . . . . . 2-14

Editing Continuous Valued Parameters ............ 2-14

Editing Units ...... ...... ....... .... 2-14

3. Menu Mode

The Chan Key . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

The Mode Key . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

The System Key . . . . . . . . . . . . . . . . . . . . . . . . 3-2

The Modify Keys . . . . . . . . . . . . . . . . . . . . . . . . 3-2

The Loss Key ......................... 3-2

Preparation ...... ...... ........ ..... 3-2

Running the Loss Application . . . . . . . . . . . . . . . . . 3-3

The Record Key . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Preparation ...... ...... ........ .....

The Stability Application . . . . . . . . . . . . . . . . . . . .

T TOTAL .......... ...... ...... .... 3-8

AUTODUMP . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Running the Stability Application . . . . . . . . . . . . . . . 3-9

The Logging Application ...... ...... ........ 3-10

SAMPLES . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

AUTODUMP . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

START .. ...... ...... ..... ........ 3-12

THRESHLD ......................... 3-12

Running the Logging Application . . . . . . . . . . . . . . . 3-13

The Manual Logging Application ................ 3-13

Running the Manual Logging Application .... ...... . 3-13

The Plot Application . . . . . . . . . . . . . . . . . . . . . . 3-14

AUTOSCAL ......................... 3-15

Y MIN ........................... 3-15

YMAX ........................... 3-15

COMMENT ...... ...... ........ ..... 3-16

Running the Plot Application . . . . . . . . . . . . . . . . . 3-16

3-6

3-7

Contents-2

Reading the Plot . . . . . . . . . . . . . . . . . . . . . . . 3-16

The Print Application ..................... 3-19

AUTOSCAL .. ...... ...... ........ ... 3-20

Y MIN ........................... 3-20

YMAX ...... ...... ....... ...... .. 3-21

COMMENT ...... ...... ........ ..... 3-21

Running the Print Application .......... ...... 3-22

Reading the Printout . . . . . . . . . . . . . . . . . . . . . 3-22

The MinMax Applications ................... 3-25

MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

SAMPLES . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

Running the MinMax Application . . . . . . . . . . . . . . . 3-27

The More Key . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

The Show Application .... ...... ........ ... 3-28

MAXIMUM ...... ...... ........ ..... 3-28

MINIMUM . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

DIFF ...... ...... ........ ..... ... 3-29

AVERAGE.......................... 3-29

#1 ...... ........ ...... ...... ... 3-29

The Alignment Application . . . . . . . . . . . . . . . . . . . 3-29

Preparation . . . . . . . . . . . . . . . . . . . . . . . . . 3-29

TYPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30

DELTA ...........................

MAXPOWER ........................

3-31

3-31

Running the Alignment Application . . . . . . . . . . . . . . 3-31

4. System Mode

The Mode Key . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

The Modify Keys . . . . . . . . . . . . . . . . . . . . . . . . 4-1

The System Key . . . . . . . . . . . . . . . . . . . . . . . . 4-2

RECALL .......................... 4-2

The Module Type ..................... 4-3

The Location ....................... 4-3

The Channel . . . . . . . . . . . . . . . . . . . . . . . . 4-3

STORE ........ ...... ........ ..... 4-4

The Module Type ..................... 4-5

The Channel . . . . . . . . . . . . . . . . . . . . . . . . 4-5

The Location ....................... 4-5

HPIB ............................ 4-5

ADDRESS . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Contents-3

LANGUAGE.... ........ ..... ...... . 4-6

DISPLAY ...... ...... ...... ...... .. 4-7

BRIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

DATETIME ...... ...... ...... ...... . 4-7

MM/DD/YY ........................ 4-8

HH:MM:SS . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

5. Programming the HP 8153A

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

The HP 8153A HP-IB Capabilities . . . . . . . . . . . . . . . . 5-2

HP-IB Display Indicators . . . . . . . . . . . . . . . . . . . . 5-2

The Parser .......................... 5-3

Parser Type . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Synchronization . . . . . . . . . . . . . . . . . . . . . . . 5-3

Clearing the Input Queue . . . . . . . . . . . . . . . . . . . 5-4

Accepted Characters . . . . . . . . . . . . . . . . . . . . . 5-4

HP-IB Bus Commands .................... 5-4

HP-IB Priority . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

TMSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Setting the HP-IB Address ........ ...... ..... 5-8

Syntax Diagram Conventions . . . . . . . . . . . . . . . . . . 5-9

6. Common Commands

Common Status Information .................. 6-1

SRQ, The Service Request .................. 6-3

Input Queue . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Output Queue . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Error Queue . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

*CLS .......... ...... ........ .... 6-4

*ESE ............................ 6-5

*ESE? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

*ESR? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

*IDN? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

*OPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

*OPC? ........................... 6-9

*OPT? .... ...... ....... ...... .... 6-9

*RST .......... ...... ........ .... 6-10

*SRE ...... ...... ........ ...... .. 6-11

*SRE? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

*STB? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

*TRG . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

Contents-4

*TST? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

*WAI ............................ 6-14

7. HP-IB Status Commands

The Status Registers . . . . . . . . . . . . . . . . . . . . . . 7-1

The Condition Registers ................... 7-2

The Transition Filters .................... 7-2

The Event Registers .. ...... ........ ..... 7-2

The Enable Registers . . . . . . . . . . . . . . . . . . . . . 7-2

The Status Commands ...... ...... ........ . 7-3

STATus:PRESet ....................... 7-3

STATus:<node>:CONDition? ................. 7-4

STATus:<node>:ENABle . . . . . . . . . . . . . . . . . . . 7-5

STATus:<node>:ENABle? .................. 7-5

STATus:<node>[:EVENt]? .................. 7-5

STATus:<node>:NTRansition . . . . . . . . . . . . . . . . . 7-6

STATus:<node>:NTRansition? ................ 7-6

STATus:<node>:PTRansition . . . . . . . . . . . . . . . . . 7-6

STATus:<node>:PTRansition? ................ 7-7

The Operation Status . . . . . . . . . . . . . . . . . . . . . . 7-7

The Operation Status Commands ............... 7-9

The OPERation node . . . . . . . . . . . . . . . . . . . . . . 7-10

The OPERation:SETTling Node . . . . . . . . . . . . . . . .

The OPERation:SETTling:LPELTier Node .......... 7-11

The OPERation:SETTling:HPELTier Node ........ .. 7-11

The OPERation:MEASuring Node . . . . . . . . . . . . . . . 7-11

The OPERation:MEASuring:POWer Node .... ...... 7-11

The OPERation:TRIGger Node .. ...... ........ 7-12

The OPERation:TRIGger:POWer Node . . . . . . . . . . . . 7-12

The OPERation:CORRecting Node . . . . . . . . . . . . . . . 7-12

The OPERation:CORRecting:ZERO Node . . . . . . . . . . . 7-12

The OPERation:AVERaging Node ............... 7-12

The OPERation:AVERaging:POWer Node . . . . . . . . . . . 7-12

The OPERation:PROGram Node . . . . . . . . . . . . . . . . 7-13

The OPERation:PROGram:<application>Node . . . . . . . . 7-13

The Questionable Status .................... 7-13

The Questionable Status Commands . . . . . . . . . . . . . . 7-15

The QUEStionable node .................... 7-16

The QUEStionable:POWer Node . . . . . . . . . . . . . . . . 7-17

The QUEStionable:POWer:OVERRange Node . . . . . . . . . 7-17

The QUEStionable:POWer:LCURRent Node .. ...... . 7-17

7-11

Contents-5

The QUEStionable:POWer:HCURRent Node ......... 7-18

The QUEStionable:POWer:LMONitor Node . . . . . . . . . . 7-18

The QUEStionable:POWer:HMONitor Node . . . . . . . . . . 7-18

The QUEStionable:POWer:ENVTemp Node . . . . . . . . . . 7-18

The QUEStionable:ISUMmary Node . . . . . . . . . . . . . . 7-19

The QUEStionable:ISUMmary:INSTrument[1j2] Node . . . . . 7-19

The QUEStionable:ISUMmary:INSTrument[1j2]:POWer Node 7-19

The Source Status ...... ...... ........ ... 7-20

The Source Status Commands The following are the source status 7-20

The SOURce node ...... ...... ........ ... 7-21

8. HP-IB Commands

ABORt Commands . . . . . . . . . . . . . . . . . . . . . . . 8-1

Specifying the Channel . . . . . . . . . . . . . . . . . . . . 8-1

ABORt ........................... 8-1

DISPlay Commands ...................... 8-2

DISPlay:BRIGhtness .... ...... ........ ... 8-2

DISPlay:BRIGhtness? . . . . . . . . . . . . . . . . . . . . . 8-2

DISPlay:STATe... ...... ...... ..... .... 8-3

DISPlay:STATe? ...... ...... ..... ...... 8-3

FETCh Commands . . . . . . . . . . . . . . . . . . . . . . . 8-4

Specifying the Channel . . . . . . . . . . . . . . . . . . . . 8-4

FETCh[:SCALar]:POWer[:DC] . . . . . . . . . . . . . . . . .

INITiate Commands ......................

Specifying the Channel . . . . . . . . . . . . . . . . . . . . 8-7

INITiate:CONTinuous ...... ........ ...... 8-7

INITiate:CONTinuous? .... ........ ...... .. 8-7

INITiate[:IMMediate] . . . . . . . . . . . . . . . . . . . . . 8-8

READ Commands ....................... 8-8

Specifying the Channel . . . . . . . . . . . . . . . . . . . . 8-8

READ[:SCALar]:POWer[:DC] ................. 8-8

SENSe Commands . . . . . . . . . . . . . . . . . . . . . . . 8-9

Specifying the Channel . . . . . . . . . . . . . . . . . . . . 8-11

SENSe:CORRection:COLLect:ZERO ........ ...... 8-11

SENSe:CORRection:COLLect:ZERO? . . . . . . . . . . . . . . 8-11

SENSe:CORRection[:LOSS[:INPut[:MAGNitude]]] . . . . . . . . 8-11

SENSe:CORRection[:LOSS[:INPut[:MAGNitude]]]? ...... . 8-12

SENSe:POWer:ATIME .................... 8-12

SENSe:POWer:ATIME? . . . . . . . . . . . . . . . . . . . . 8-13

SENSe:POWer:RANGe:AUTO ................. 8-13

SENSe:POWer:RANGe:AUTO? ...... ...... .... 8-13

8-4

8-7

Contents-6

SENSe:POWer:RANGe[:UPPER] . . . . . . . . . . . . . . . . 8-14

SENSe:POWer:RANGe[:UPPER]? ............... 8-16

SENSe:POWer:REFerence .................. 8-16

SENSe:POWer:REFerence? .................. 8-17

SENSe:POWer:REFerence:DISPlay .......... .... 8-18

SENSe:POWer:REFerence:STATe ............... 8-19

SENSe:POWer:REFerence:STATe? ............... 8-19

SENSe:POWer:REFerence:STATe:RATIo ............ 8-20

SENSe:POWer:REFerence:STATe:RATIo? . . . . . . . . . . . . 8-20

SENSe:POWer:UNIT .......... ...... ..... 8-21

SENSe:POWer:UNIT? . . . . . . . . . . . . . . . . . . . . . 8-21

SENSe:POWer:WAVElength . . . . . . . . . . . . . . . . . . 8-21

SENSe:POWer:WAVElength? ................. 8-22

SOURce Commands ...................... 8-22

Specifying the Channel . . . . . . . . . . . . . . . . . . . . 8-23

SOURce:AM[:INTernal]:FREQuency . . . . . . . . . . . . . . 8-23

SOURce:AM[:INTernal]:FREQuency? ............. 8-23

SOURce:POWer:ATTenuation ................. 8-24

SOURce:POWer:ATTenuation? . . . . . . . . . . . . . . . . . 8-24

SOURce:POWer:STATe .......... ...... .... 8-24

SOURce:POWer:STATe?.. ...... ...... ...... 8-25

SOURce:POWer:WAVElength .......... ...... . 8-25

SOURce:POWer:WAVElength? . . . . . . . . . . . . . . . . .

8-26

SYSTem Commands .... ...... ...... ...... 8-26

SYSTem:DATE........................ 8-27

SYSTem:DATE? .... ...... ...... ..... .. 8-27

SYSTem:ERRor? .... ...... ..... ........ 8-27

SYSTem:TIME . . . . . . . . . . . . . . . . . . . . . . . . 8-28

SYSTem:TIME? ...... ...... ..... ...... 8-29

9. HP-IB Application Commands

Program Commands ...................... 9-1

PROGram[:SELected]:EXECute . . . . . . . . . . . . . . . . 9-2

PROGram[:SELected]:NAME ................. 9-2

PROGram[:SELected]:NAME? . . . . . . . . . . . . . . . . . 9-3

PROGram[:SELected]:NUMBer ................ 9-3

PROGram[:SELected]:NUMBer? . . . . . . . . . . . . . . . . 9-3

PROGram[:SELected]:STATe .. ...... ...... ... 9-4

PROGram[:SELected]:STATe? ...... ...... ..... 9-4

Mainframe Applications .................... 9-5

The Logging Application .... ...... ........ .. 9-5

Contents-7

The Stability Application . . . . . . . . . . . . . . . . . . . . 9-6

10. HP-IB Programming Examples

Example 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

Example 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Example 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5

Example 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7

Example 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10

Example 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13

Example 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15

A. Installation

Safety Considerations ..................... A-1

Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . A-2

Line Power Requirements ................... A-2

Line Power Cable ...................... A-2

Operating Environment .................... A-4

Temperature . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Humidity .......................... A-5

Instrument Cooling ..................... A-5

Input/Output Signals . . . . . . . . . . . . . . . . . . . . . A-5

HP-IB Interface ........................

Cables and Adapters . . . . . . . . . . . . . . . . . . . . .

Connector . . . . . . . . . . . . . . . . . . . . . . . . . .

HP-IB Logic Levels . . . . . . . . . . . . . . . . . . . . . . A-7

Removing and Fitting Modules .......... ...... . A-7

How to Remove a Module .. ...... ...... .... A-7

How to Fit a Module . . . . . . . . . . . . . . . . . . . . . A-8

Storage and Shipment .......... ..... ...... A-9

Claims and Repackaging .................... A-10

Return Shipments to HP ................... A-10

A-5

A-6

A-6

B. Accessories

Mainframe .......................... B-1

Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Connector Interfaces and Other Accessories . . . . . . . . . . . B-3

Contents-8

C. Specications

Mainframe Specications . . . . . . . . . . . . . . . . . . . . C-1

Declaration of Conformity ................... C-3

Supplementary Information: ................ C-4

Acoustic Noise Emission ................... C-5

D. Function Tests

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

Equipment Required . . . . . . . . . . . . . . . . . . . . . . D-1

Test Record .......................... D-2

Test Failure .......................... D-2

Instruments Specications ........ ..... ...... D-2

IA. Function Test Using the HP 81533A . . . . . . . . . . . . . D-3

Display Function and Module Interface Tests ......... D-3

Display Function Tests . . . . . . . . . . . . . . . . . . . D-3

Module Interface Tests . . . . . . . . . . . . . . . . . . . D-4

ANALOG INPUT (8152A IN) ................. D-6

P.CTRL ...... ...... ...... ...... ... D-6

IB. Function Test using a HP 81530/31/32 or HP 81536A ..... D-6

HP-IB Interface Test (Optional) . . . . . . . . . . . . . . . . . D-7

E. Cleaning Procedures

Cleaning Materials . . . . . . . . . . . . . . . . . . . . . . .

Cleaning Fiber/Front-Panel Connectors .. ...... ..... E-2

Cleaning Connector Interfaces .. ...... ....... .. E-2

Cleaning Connector Bushings . . . . . . . . . . . . . . . . . . E-3

Cleaning Detector Windows .................. E-3

Cleaning Lens Adapters .... ...... ...... .... E-3

Cleaning Detector Lens Interfaces ........ ...... . E-4

E-1

F. Local Control Summary

Measure Mode . . . . . . . . . . . . . . . . . . . . . . . . . F-1

Menu Mode ...... ...... ........ ..... . F-2

System Mode .... ...... ........ ...... . F-3

Contents-9

G. HP 8153A HP-IB Command Summary

The Logging Application ...... ...... ........ G-4

The Stability Application . . . . . . . . . . . . . . . . . . . . G-5

H. HP 8152A HP-IB Command Summary

Dierences .......................... H-1

Using the FETCh Command - An Example . . . . . . . . . . . . H-3

Setting the Filter .......... ..... ........ H-4

Listener Function ....................... H-5

Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . H-5

Standard Parameter Set ................... H-7

Talker Function ........................ H-8

Interrogating Settings .................... H-8

Status/Error Reporting . . . . . . . . . . . . . . . . . . . . H-10

Universal Commands . . . . . . . . . . . . . . . . . . . . . . H-10

I. Error Codes

Local Operation Error Codes .................. I-1

Module Related Errors . . . . . . . . . . . . . . . . . . . . I-1

Specic Error Identiers . . . . . . . . . . . . . . . . . . . I-2

Store and Recall Errors . . . . . . . . . . . . . . . . . . . . I-2

Plot, Print, Show, and Manual Logging Errors ......... I-2

Loss Errors .... ...... ........ ...... .

HP-IB Errors ........................

HP-IB Error Codes . . . . . . . . . . . . . . . . . . . . . . . I-3

No Error .. ...... ........ ..... ..... I-3

Instrument Specic Errors .................. I-3

Command Errors . . . . . . . . . . . . . . . . . . . . . . . I-4

Execution Errors ........ ...... ........ I-6

Device Dependant Errors . . . . . . . . . . . . . . . . . . . I-7

Query Errors ........................ I-8

I-2

I-3

J. Sales and Service Oces

K. Backdating

Instruments with Serial Numbers 2946G00475 and Earlier .... K-1

Instruments with Serial Numbers 2946G00225 and Earlier .... K-2

The Print Application ........ ...... ...... K-2

SAMPLES . . . . . . . . . . . . . . . . . . . . . . . . . K-2

COMMENT ........................ K-2

Contents-10

Index

Contents-11

Figures

0-1. Line Power Cables - Plug Identication ............ iv

1-1. The HP 8153A System .................... 1-1

1-2. The HP 8153A Keyboard . . . . . . . . . . . . . . . . . . . 1-2

1-3. The HP 8153A Display . . . . . . . . . . . . . . . . . . . . 1-6

1-4. Hardware Set Up for the Sample Session .. ...... ... 1-8

1-5. The Display at the Start of the Sample Session . . . . . . . . .

1-6. Editing the Sensor Wavelength .... ...... ...... 1-10

1-7. Reading the Power Output by the Source ........... 1-11

1-8. Going into Menu Mode . . . . . . . . . . . . . . . . . . . .

1-9. A Plotter Connected to the HP 8153A . . . . . . . . . . . . .



2-1. Measurements with T

Average

1 second . . . . . . . . . . . . 2-4

2-2. Editing the Averaging Time Parameter .. ...... .... 2-4

2-3. The Display while Channel A is Being Zeroed ...... ... 2-10

3-1. Measuring the Reference for the Loss Application ...... . 3-3

3-2. Measuring the Loss of a Device Under Test (DUT) .... ... 3-4

3-3. The Loss Result ....................... 3-5

3-4. Setup for a Record Application . . . . . . . . . . . . . . . . 3-6

3-5. Selecting an Application : Stability . . . . . . . . . . . . . . 3-7

3-6. Editing an Application Parameter : Samples . . . . . . . . . . 3-11

3-7. Stability Plot ........................ 3-18

3-8. Logging Printout . . . . . . . . . . . . . . . . . . . . . . . 3-23

3-9. The Window and Refresh Modes ............... 3-26

3-10. Setup for an Alignment Application . . . . . . . . . . . . . . 3-30

3-11. The Display during the Alignment Application . . . . . . . . . 3-32

4-1. Making a Selection in System Mode : the Recall Function .. . 4-2

4-2. Editing a Parameter in System Mode ............. 4-4

4-3. Setting the Brightness of the Display ............. 4-7

6-1. Common Status Registers . . . . . . . . . . . . . . . . . . . 6-2

7-1. The Registers and Filters in a Node . . . . . . . . . . . . . . 7-1

7-2. The Operation Registers ................... 7-8

7-3. The Questionable Registers . . . . . . . . . . . . . . . . . . 7-14

7-4. The Source Register ........ ...... ..... .. 7-20

1-9

1-11

1-13

Contents-12

8-1. Measurements with T

8-2. Measurements with T

8-3. Measurements with T

A-1. Line Power Cables - Plug Identication ............ A-4

A-2. HP-IB Connector . . . . . . . . . . . . . . . . . . . . . . . A-6

A-3. How to Remove a Module .................. A-8

A-4. Fitting a Module . . . . . . . . . . . . . . . . . . . . . . . A-9

Average

Average

Average



1 second . . . . . . . . . . . . 8-5

>

1 second, continuous triggering. . 8-5

>

1 second, immediate triggering. . 8-6

Contents-13

Tables

1-1. Description of the Display .......... ...... .. 1-6

2-1. ............................... 2-6

2-2. Power Ranges . . . . . . . . . . . . . . . . . . . . . . . . 2-12

5-1. HP-IB Capabilities .. ...... ...... ...... .. 5-2

5-2. Accepted Characters . . . . . . . . . . . . . . . . . . . . . 5-4

5-3. HP-IB Bus Commands .................... 5-5

6-1. Common Command Summary . . . . . . . . . . . . . . . . . 6-4

6-2. The Standard Event Status Enable Register .......... 6-5

6-3. The Standard Event Status Register . . . . . . . . . . . . . .

6-4. Reset State (Standard Setting) .. ...... ...... .. 6-11

6-5. The Service Request Enable Register .. ...... ..... 6-12

6-6. The Status Byte Register . . . . . . . . . . . . . . . . . . .

7-1.

7-2.

7-3.

STATus

STATus

STATus

Command Summary ........ ...... ... 7-9

Command Summary ........ ...... ... 7-15

Command Summary ........ ...... ... 7-21

8-1. ABORt Command Summary ................. 8-1

8-2.

DISPlay

Command Summary . . . . . . . . . . . . . . . . . 8-2

8-3. FETCh Command Summary ................. 8-4

8-4. INITiate Command Summary . . . . . . . . . . . . . . . . . 8-7

8-5. READ Command Summary . . . . . . . . . . . . . . . . . . 8-8

8-6.

SENSe

Command Summary . . . . . . . . . . . . . . . . . . 8-10

8-7. ............................... 8-15

8-8.

8-9.

9-1.

G-1.

G-2.

SOURce

SYSTem

PROGram

STATus

STATus

Command Summary ........ ...... ... 8-22

Command Summary ........ ...... ... 8-26

Command Summary . . . . . . . . . . . . . . . . . 9-2

Command Summary ........ ...... ... G-8

Command Summary ........ ...... ... G-9

6-7

6-13

Contents-14

Getting Started

This chapter introduces the features of the HP 8153A and gives you an

opportunity to familiarize yourself with the way you operate the instrument.

The HP 8153A System

The central element of the system is the HP 8153A mainframe.You customize

the instrument using plug-in modules and a changeable ber-connector

interfaces.

1

1

Figure 1-1. The HP 8153A System

Getting Started 1-1

1

A Quick Overview

The Keyboard

Most of the keys have two functions

, depending on the selected mode. Dierent

colors, or whether the legend is on the key or above it, show these dierent

functions.

Figure 1-2. The HP 8153A Keyboard

The

4

5

Chan

key, the

4

Mode

5

key, and the modify keys always have the same

function.

4

Chan

5

Select the channel. The other keys act only on the selected

channel. Channel A corresponds to the module in the left slot.

Channel B corresponds to the module in the right slot.

4

5

Mode

Modify

Keys

Switch between Measure and Menu Mode.

4(5,4)5

5

4+5,4

*

Select the digit or character to edit.

Edit the selected digit or character, or the parameter.

Measure Mode

Measure mode is the mode selected automatically when you switch on the

instrument. In this mode you can set up and make simple measurements.In

measure mode, the black writing on the key shows its function.

4

Param

5

Select the measurement-parameter that you want to view or edit.

1-2 Getting Started

4

Disp!Ref

5

Measure and record the input power-level for use as a reference.

1

4dB5

4

dBm/W

4

Zero

5

5

Display the input power-level relative to a reference.

Switch between dBm and Watt units.

Measure the electrical noise in the instrument, and compensate for

it.

4

5

N Dig

Range Keys

Select the number of decimal places shown in the result.

4

Auto

4Up5

4

Down

5

5

Start or stop automatic ranging.

Select the next higher measuring range.

Select the next lower measuring range.

Menu Mode

In this mode there are pre-programmed routines to perform some common, but

more complicated, measurements. In menu mode, the blue writing above the

key shows the function of the key.

There are some keys whose operation is common to all of the tasks you do in

menu mode.

4

5

gives you access to the parameters for editing.

Edit

5

4

Prev

5

and

step through the items in a menu. For example, these can be

4

Next

dierent types of Record applications, or the dierent parameters for the

system conguration.

4

5

to execute an application, or to nish editing a change of a system

Exec

parameter.

4

5

to pause the running application or to continue a paused application.

Pause

4

System

4

Loss

5

Select system-parameters. This allows you to view or edit the

conguration of the instrument.

5

Select the Loss application. A loss measurement tells you how

much of your optical signal you lose by passing it through a device.

Loss is calculated by the following formula:

P

Loss

=10

To measure loss you need both quantities,P

log

out

(

)

dB

P

in

in

and P

out

. The

application records Pinwhen you start the application. The

instrument expresses all the following results relative to this.

These results are loss results.

Getting Started 1-3

1

4

Record

5

Select from the Stability, Logging, Manual Logging, Plot or Print

applications.

Stability takes samples at evenly spaced intervals for a specied

period.

The parameters for this application are

T_TOTAL

Which sets the total time over which the

measurements are to be made.

AUTODUMP

Which sets whether the results are output to a

printer or plotter when the application nishes.

Logging takes a specied number of samples one immediately

after the other. That is, as soon as the rst sample has ended,

the second starts.

The parameters for this application are

SAMPLES

AUTODUMP

Which sets the number of samples to be taken.

Which sets whether the results are output to a

printer or plotter when the application nishes.

START

Which sets whether the application starts

immediately, or only after the power goes above,or

below, a specied threshold level.

THRESHLD

Which sets the threshold level to be passed before

the application begins.

Manual Logging takes a sample each time the user presses the

4

5

key.

Exec

In addition, the plot and print applications allow you to make

a graphics plot, or a printout from the samples of your record

application.

The parameters for the plot and print applications are

AUTOSCAL

Y_MIN

Y_MAX

COMMENT

4

More

5

Select from the other applications. As standard, the instrument has

Show and Alignment applications.

1-4 Getting Started

Which sets whether the axes are scaled automatically

or not.

Which sets the minimum value for the y-axis.

Which sets the maximum value for the y-axis.

Which allows you to add your own text to the

printout or plot.

The Show application lets you look at the sample values from the

most recent Stability, Logging, or Manual Logging application.

Some simple statistics for the results are also given.

The Alignment application gives you visual, and audible

feedback of the input power, to help you align two components

for the maximum transfer of optical power.

The parameters for this application are

1

TYPE

DELTA

MAXPOWER

The

4

Pause

Which sets whether the maximum transferred

power is determined automatically by the

instrument, or set manually by the user.

Which sets the size of the change in transferred

power indicated on the display, or by the tone.

Which sets expected, or required, maximum

transferred power.

5

key switches on and o the tone.

Getting Started 1-5

1

The Display

The display shows the status and the readings.

Figure 1-3. The HP 8153A Display

Table 1-1. Description of the Display

NNNNNNNN

1

Ch

annel Indicator

Description

Shows the selected channel.

NNNNNNNNNNNNNN

2

Mode

Indicator

Shows the operating mode.

3

Communications

Indicator

NNNNNNNNNNNNNNNNNNNNNNNNNN

TLK ONLY

NNNNNNNNNNNNNNNNNNNNNNNNNN

4

Low Batt

Indicator

1-6 Getting Started

NNNNNNNNNNN

RMT

NNNNNNNNNNN

SRQ

ery

Shows the state of the HP-IB communications.

Remote communications are taking place.

Talk-only selected for the HP-IB.

A service request is pending.

Indicates that the internal battery voltage is

low.

Table 1-1. Description of the Display (continued)

5

Result Field

6

Reference Indicator

A/REF

or

B/REF

A/BorB/A

7

Bar Graph

8

Operation Indicator

AUTO

APPL

EDIT

RUN

PAUSE

eter Indicator

9

NNNNNNNNNNNNNNNNN

Param

CAL

REF

ATT

AUX

10

Character Field

1

Description

This is where the results of tests or

applications are shown.

Shows the reference used for a dB result.

Results relative to a reference.

Results relative to the other channel.

Gives a linear graphical representation of the

result.

Shows the operation type.

The range is being selected automatically.

An application has been selected.

An application parameter is being edited.

An application is running.

An application has been temporarily halted.

shows the type of parameter in the character

eld.



Character eld shows wavelength.

Character eld shows the calibration factor.

T

Character eld shows the averaging time.

Character eld shows the reference level.

Character eld shows the attenuation of the

source.

Auxiliary Parameters.

Used for parameters, and error messages.

Getting Started 1-7

1

A Sample Session

In this sample session you recall the standard setting, take a power

measurement, and then do some data logging.

Hardware Setup

Figure 1-4. Hardware Set Up for the Sample Session

This session assumes that you have a multimeter congured with one source and

one sensor module. The source module is in channel B and the sensor module is

in channel A. Attach the source to the sensor with a piece of optic ber. At the

start of the session, make sure that the instrument is o.

Switching On and Recalling the Standard Setting

1. Set up the instrument as described above.

2. Switch on the instrument. All the display lights, and then the message

SELFTEST

the default power on conditions.

The current channel is channel A.

The instrument is in measure mode.

The source is inactive.

The sensor is reading the optical power at its input. Autoranging is

enabled.

1-8 Getting Started

shows in the character eld in both channels. The following are

Figure 1-5. The Display at the Start of the Sample Session

1

3. Press

4

5

. The instrument goes to menu mode. It shows the

Mode

indicator at the top of the display and the word

at the bottom of the display.

4. Press

4

System

5

. The instrument goes into system mode, it shows the

mode indicator. The character eld shows the message

the display is o.

5. Press

6. Press

4

5

Edit

the message

5

4

Exec

. The instrument shows the

RECALL 0!A

shows in the character eld.

MENU SYS EDIT

to recall the standard setting for channel A. The

indicator shows while the setting is being recalled.

5

7. Press

. The instrument shows the message

4

*

character eld.

5

8. Press

9. Press

to recall the standard setting for channel B.

4

Exec

4

5

to return the instrument to measure mode.

Mode

Making A Power Measurement

Note

Normally, the instrument is left for 20 minutes to warm up.

Maximum accuracy is only possible if the instrument is allowed

to warm up.For this sample session we do not need this

accuracy, so you can go to the next step immediately.

MENU

in the character eld

RECALL

mode indicator and

RUN

RECALL 0!B

MENU

mode

MENU SYS

. The rest of

operation

in the

Getting Started 1-9

1

5

10. Press

4

Param

until theparameter indicator for channel A lights. The

character eld on the left hand side now shows the wavelength for the

sensor. The wavelength of the source shows in the result eld on the right

side. Set the wavelength of the sensor to the wavelength of the source.

5

Use

4*5

4

(

and

5

and

4+5

to select a modiable digit. The modiable digit blinks. Use

4

)

to alter the value of this digit.

Figure 1-6. Editing the Sensor Wavelength

11. Press

4

Zero

ZEROING

5

to remove any electrical osets in the circuitry. The message

is shown in the character eld and

----

shows blinking in the

result eld.

12. Enable the source by pressing the button on its front panel. The green LED

lights to show that the source is now active.

13. The instrument shows the power of the source in the result eld of channel

A, in Watts.

1-10 Getting Started

Figure 1-7. Reading the Power Output by the Source

Logging Data

You will now set up the instrument to record 250 consecutive power readings.

The instrument starts this part with the settings used after the section \Making

aPower Measurement".

1

5

14. Press

MENU.MENU

to change to menu mode. The mode indicator changes to show

4

Menu

is displayed in the character eld.

Figure 1-8. Going into Menu Mode

15. Press

4

Record

5

to choose a record application. The

switches on. The character eld shows

that the character eld shows

LOGGING

STABILTY

.

APPL

operation indicator

. Press

4

Record

Getting Started 1-11

5

again, so

1

5

, the

EDIT

16. Press

the left shows

4

Edit

SAMPLES

operation indicator lights and the character eld on

. The other character eld shows the setting for the

number of samples to be taken.

Use the Modify keys to set the number of samples to 250.

17. Press

18. Press

4

5

Next

it is not, use

4

5

Next

to

IMMEDIAT

, the character eld shows

4*5or4+5

to switch it

. The character eld shows

AUTODUMP

OFF

.

START

. Make sure that it is

Use

4*5or4+5

to set the state

. This means that the logging starts immediately when you

OFF

execute it.

19. Press

4

5

again to get back to the display with

Edit

LOGGING

in the character

eld.

You have now set the parameters for the application. The application takes

a just under a minute to record the values

. While it is running try moving

and twisting the ber to change the power received at the sensor.

20. Press

to start the application. The instrument shows the

4

Exec

RUN

operation

5

indicator. While the application is running, the character eld shows the

number of the sample that is being taken. When the application nishes,

the

RUN

indicator goes out.

Examining the Data

After you have run the Logging application, you can look at the data that has

been recorded. You do this using the Show application.

21. Press

22. Press

. The character eld shows the word

4

More

4

5

. The character eld now shows

Edit

SHOW

MAXIMUM

.

and the value of the

5

highest reading taken during the logging.

.If

23. Press

4

5

. The character eld now shows

Next

lowest reading taken during the logging.

5

24. Press

. The character eld shows

4

Next

highest and lowest readings.

25. Press

4

5

. The character eld shows

Next

readings.

26. Press

4

5

. The character eld shows

Next

To examine all the readings, use the

1-12 Getting Started

DIFF

AVERAGE

#1

4*5

and

MINIMUM

and the value of the

and the dierence between the

and the average of the

and the value of the rst reading.

4+5

.

1

27. When you have nished examining the readings

the display with

SHOW

in the character eld.

, press

5

to get back to

4

Edit

Plotting Data

Now that you have recorded the data, you can plot it on a plotter using the

Hewlett-Packard|Interface Bus (HP-IB).

28. Attach the instrument to a graphics-plotter that has HP-GL capabilities.

Attach the plotter to the HP-IB connector. Do not attach any other device

to this connector at the same time as the plotter. Make sure that the plotter

is congured at address 5.

29. Make sure that the instrument is in T

is in Talk Only mode, the

NNNNNNNNNNNNNNNNNNNNNNNNNN

TLK ONLY

alk Only mode. When the instrument

shows at the top of the display. If the

instrument is not in Talk Only mode use the following procedure to put it

into Talk Only mode

a. Press

b. Press

4

5

System

4

Edit

repeatedly until

5

. The character eld shows the message

HPIB

shows in the character eld.

ADDRESS

and the

HP-IB address of the HP 8153A.

c. Press

d. Use the modify keys to set the HP-IB state to

4

Next

TLK LSTN

5

. The character eld shows the message

is blinking.

TLK ONLY

MODE

.

. The word

e. Press

4

5

to return to the display with

Edit

HPIB

in the character eld.

Figure 1-9. A Plotter Connected to the HP 8153A

Getting Started 1-13

1

30. Press

4

Record

repeatedly, until the message

PLOT

shows in the character

5

eld.

31. Press

4

5

. The character eld shows

Edit

AUTOSCAL

. Use the modify keys to set

this parameter toON. This means that the instrument automatically scales

the plot.

32. Press

4

5

. The character eld shows

Next

COMMENT

. The comment is a message

that prints on the plot. Use the modify keys to enter a comment. Use

and

4)5

to select a character position in your comment. Use

letter and

33. Press

34. Press

The

RUN

4+5

to select a number for your comment.

4

5

to get back to the display with

Edit

4

5

to plot the readings.

Exec

Mode indicator shows while the graph of the results plots

plot has nished the

RUN

indicator switches o.

PLOT

in the character eld.

4*5

. When the

This ends the sample session.

4(5

to select a

1-14 Getting Started

Measure Mode

The default mode at switch-on is Measure Mode. When the instrument is in

measure mode, the mode-indicator shows

MEAS

. In measure mode, the function

of key is shown by the black legend on the key.

The Chan Key

4

5

selects the channel. This can be A or B. The channel- indicator, at the top

Chan

of the display, shows the selected channel.

2

2

Note

When the instrument is under remote operation, this key acts as

Functions in Measure mode apply only to the selected channel.

5

. That is,

4

Local

it returns the instrument to local operation (unless Local Lockout is active).

The Mode Key

4

5

changes the operating mode. If you press this key in measure mode,it

Mode

changes the instrument into menu mode (the next chapter gives a description of

menu mode).

Note

The commands described in this chapter can only be used when

the instrument is in Measure mode.

Local Control - Measure Mode 2-1

2

The Param Key

Use

4

5

to select a measurement-parameters for editing. The parameter-

Param

indicator shows the selected parameter, the character eld shows the value of

the parameter.You can select the next parameter by pressing

4

Param

5

again.

When the hardware does not use a particular parameter, you cannot select it.

When you have selected a parameter, you can edit it using the Modify keys

(described later in this chapter). Some parameters are set by the instrument,

these cannot be edited.

The Applications in Menu mode also use the parameters set in Measure mode.

Entry Status

When you select a parameter, the editable part blinks. The editable part can be

one digit or character, or the whole parameter.You can only edit a parameter,or

a part of a parameter, while it is blinking.

If you do not press any more keys within 10 seconds, the blinking stops and you

are prevented from editing the value.You can enable editing again if you press

any of the Modify keys.

Note

The instrument holds the parameter information in memory

until you edit it. Switching the instrument o does not aect

the parameters.

Default Values

5

If you hold down

4

for 2 seconds or longer, the parameter is set to its

Param

default value.

Parameter List

The parameters and their specications are as follows:



This is the wavelength value. Sometimes, you can set the wavelength to any

value within limits set by the module (for example, for a power sensor). For

other modules, you can choose one wavelength from two possibilities (for

2-2 Local Control - Measure Mode

example, multi-wavelength sources). In other cases, the module sets this value

and you can display the value but you cannot edit it.

2

Display Format

nnnn.n

nm

Limits Depends on the module used.

Resolution 0.1nm

Default Depends on the module used.

CAL

This is a calibration oset that you can enter to compensate for external optical

circuitry. This value is automatically subtracted from the input signal.

P

measured

(

dBm)=P

input

(

dBm)0

CAL(dB

)

Where,

P

measured

P

is the adjusted value of the signal read,

is the input signal level, and

input

CAL is the calibration oset.

Display Format6nnn.nnn

dB

Limits -200.000dBnnn.nnn+200.000dB

Resolution .001dB

Default 0.000dB

When the calibration factor is not set to zero, the

CAL

parameter- indicator stays

on at half brightness.

T

This is the length of time over which a signal is averaged. Longer averaging

times increase the accuracy and improve the noise rejection of the

measurement. Longer averaging times also decrease sensitivity and increase the

length of time between updates of the results on the display.

For averaging times of 1 second or less, a new measurement is shown on the

display at the end of each averaging time. This is drawn in Figure 2-1. A new

measurement is shown on the display at each x.

Local Control - Measure Mode 2-3

2



Figure 2-1. Measurements with T

Average

1 second

For averaging times of more than 1 second, the x value is given by the formula

x

new

=



10T

x

old

T

sample

avg



+

Sample



T

sample

T



avg

Where

x

x

new

old

is the new, displayed result,

is the previously displayed result,

Sample is the value read by the hardware,

T

avg

T

sample

is the averaging time (as set by the user), and

is the time taken, by the hardware, to make a reading.

If the measurement conditions are changed (for example, by a range change in

autoranging) x

is reset, and the averaging starts again. This is why the display

old

update seems faster in autoranging.

Display Format

nnnms,s,

min

Values 20, 50, 100, 200, 500ms, 1, 2, 5, 10, 20, 30s, 1, 2, 5, 10, 15, 20,

30, 60min

Default 200ms

Figure 2-2. Editing the Averaging Time Parameter

2-4 Local Control - Measure Mode

REF

dB results are shown relative to a reference-level. This parameter sets the

reference-level. You can choose the units for the reference using

4

dBm W

5

.

Setting, or changing, the reference only aects results that are displayed in dB.

2

P

display

(dB)=

P

measured

0

REF

Where,

P

display

P

measured

is the displayed, relative power,

is the absolute power-level (see \CAL"), and

REF is the reference.

Logarithmic Units

Display Format6nnn.nnn

dBm

Limits -200.000dBmnnn.nnn+200.000dBm

Resolution 0.001dBm

Default 0.000dBm

Linear Units

Display Format 5 digits pW,nW,W,mW.

Limits 0.001pWn9999.9mW

Resolution see Table 2-1

Default 1000.0W

Local Control - Measure Mode 2-5

2

Range Upper Limit

Table 2-1.

Linear Power

Resolution

@T100ms

+30dBm 1999.9mW 100W

+20dBm 199.99mW 10W

+10dBm 19.999mW 1W

0dBm 1999.9W 100nW

-10dBm 199.99W 10nW

-20dBm 19.999W 1nW

-30dBm 1999.9nW 100pW

-40dBm 199.99nW 10pW

-50dBm 19.999nW 1pW

-60dBm 1999.9pW 0.1pW

-70dBm 199.99pW 0.01pW

-80dBm 19.999pW 0.001pW

ATT

The amount of power that is output from a source can be controlled. This

parameter sets the attenuation of an output.

P

output

=

P

source

0

AT T(dB

)

Where,

P

P

is the power-level at the output of the module,

output

is the power-level at the output of the source, and

source

ATT is the attenuation parameter.

Display Format6n.n

dB

Limits 0.0dBn.n6.0dB

Resolution 0.1dB

Default 0.0dB

2-6 Local Control - Measure Mode

AUX

The output amplitude of a source can be modulated by a square wave. This

parameter sets the frequency of the modulation. The modulation can be one of

CW (continuous wave, that is no modulation), 270Hz, 1kHz, or 2kHz.

Values CW, 270Hz, 1, 2kHz

Default CW

The Disp!Ref Key

2

Pressing this key takes the input power-level and stores it as the reference

.

Setting, or changing, the reference in this way only aects results displayed in

dB.

If the display is in dBm or Watts, the measured power-level is stored as the

reference, that is

REF=P

measured

Where,

REF is the reference, and

P

measured

is the absolute power-level (see \CAL").

If the display is in dB, this value is converted to dBm or Watts before being

stored as a reference, that is

REF

new

=

P

display

(dB)+

REF

old

Where,

REF

P

display

REF

is the reference after the key press,

new

is the displayed, relative power, and

is the reference before the key press.

old

Local Control - Measure Mode 2-7

2

The dB Key

This key switches the display to show results in dB

given with respect to another power-level. This can be a stored reference

. Results in dB are always

,orit

can be a second power-level.

Using

4dB5

with a Two Sensor Instrument

For an instrument with two sensors, the dB result can be with respect to the

reference stored for the channel, or it can be with respect to the power-level of

the other channel.

If the result is in dB with respect to the power-level of the other channel,

4dB5

changes the result to dB with respect to the stored reference. The

reference-indicator shows

set the reference you use

A/REForB/REF

5or4

4

Param

P

display

Disp!Ref

(dB)=

.To see the reference , use

5

.

0

P

measured

REF

4

Param

5

.To

Where,

P

display

P

measured

is the displayed, relative power,

is the absolute power-level (see \CAL"), and

REF is the reference.

If the result is in dB with respect to the reference,

4dB5

changes the result to dB

with respect to the power-level in the other channel. The reference-indicator

shows

A/BorB/A

. When the result is with respect to the power-level in the

other channel, the stored reference is also used in the calculation of the

displayed result.

P

display

(dB)=

P

measured

Where,

P

display

P

measured

is the displayed, relative power,

is the absolute power-level (see \CAL"), and

REF is the reference.

If the result is in dBm or Watts,

2-8 Local Control - Measure Mode

0

P

1stChan

5

changes the result to dB.

4

dB

measured

2ndChan

0

REF

Using

4dB5

the stored reference. The reference-indicator shows

reference, use

4dB5

with a One Sensor Instrument

changes the display to show the result as a relative value with respect to

A/REForB/REF

4

5

.To set the reference, use

Param

4

Param

5or4

Disp!Ref

5

.

2

.To see the

P

display

(dB)=

P

measured

0

REF

Where,

P

display

P

measured

is the displayed, relative power,

is the absolute power-level (see \CAL"), and

REF is the reference.

The dBm/W Key

This key changes the display to show results in dBm or in W

5

If the results are in dB,

4

dBm W

changes the display to showing the result as

dBm or Watts.

5

If the results are in dBm,

4

dBm W

changes the display to showing the results in

Watts.

5

If the results are in Watts,

4

dBm W

changes the display to showing the result in

dBm.

The Zero Key

atts.

The

4

5

works with sensor modules. The function of

Zero

4

5

is to remove any

Zero

electrical oset in the sensor circuitry.

The instrument measures by converting optical power to electrical power, and

then measuring the electrical power. An electrical oset is power that is always

present, even if there is no light at the input. If this oset is not removed, it

will aect the results.

4

5

measures the electrical power when there is no light at the input. The

Zero

instrument uses this value to remove the oset from all further incoming

signals.

Local Control - Measure Mode 2-9

2

Note

The environmental conditions and the temperature of the

instrument aect the electrical oset. For the best results you

must:

Allow the instrument time to acclimatize (c

Allow the instrument time to warm up (c

Make sure that the optical input is not receiving any light. If

you are using multi-mode cable you must disconnect the cable

and cover the input to the sensor to perform a zero

It is a good practice to zero the instrument before making any

important measurements.

The zero operation is performed just for the selected channel. The instrument

automatically repeats the zero operation for each measurement range.

.24 hours).

.20 minutes).

.

Figure 2-3. The Display while Channel A is Being Zeroed

If there is light at the sensor input during a zero operation, the instrument

shows the message

to use the instrument, you can abort the zero operation by pressing any key.

2-10 Local Control - Measure Mode

ZERO ERR

. If you cannot remove the light, but you still want

The N Dig Key

This key selects the number of digits shown after the decimal point in the

5

result. When you use

the number of digits has been reduced to 1,

digits shown. The maximum number of digits after the decimal point is 3.

The Range Keys

The range keys select the range of the units for the result. The table below

gives the possible ranges for results. The available ranges depend on the module

used.

4

rst, it reduces the number of digits shown. After

N Dig

5

4

increases the number of

N Dig

2

Local Control - Measure Mode 2-11

2

Table 2-2. Power Ranges

Range Upper Linear

Power Limit

+30dBm 1999.9mW

+20dBm 199.99mW

+10dBm 19.999mW

0dBm 1999.9W

-10dBm 199.99W

-20dBm 19.999W

-30dBm 1999.9nW

-40dBm 199.99nW

-50dBm 19.999nW

-60dBm 1999.9pW

-70dBm 199.99pW

-80dBm 19.999pW

-90dBm 1.999pW

-100dBm 0.199pW

-110dBm 0.019pW

The range the instrument is using shows on the display while you press a range

keys. But, note that pressing a Range key alters the range used. Pressing

stops or starts the automatic ranging. Pressing

4Up5or4

5

selects the next

Down

4

Auto

range before showing it.

The bar graph below the result shows the result graphically. The left end of the

bar is 0% of the selected range, the right end of the bar is 100% of the selected

range.

2-12 Local Control - Measure Mode

5

The Auto Key

4

5

enables or disables automatic ranging for the result. Automatic ranging

Auto

ensures that the result has a displayed value between 9% and 100% of full

scale. While you have automatic ranging enabled, the operation-indicator shows

AUTO

in the middle of the display. The default state is for automatic ranging to

be enabled.

The Up Key

This key selects the next higher range. If automatic ranging was in operation,

this key disables it.

2

Example

If the instrument is currently in the range 2.000 to 19.999

5

pressing

takes it to the 20.00 to 199.99W range.

4

Up



W,

The Down Key

This key selects the next lower range. If automatic ranging was in operation,

this key disables it.

Example

If the instrument is currently in the -20dBm range

4

5

takes it to the -30dBm range.

Down

, pressing

The Analog Output

The analog output is the BNC connector on the front of the sensor module.It

outputs a voltage directly proportional to the strength of the optical signal at

the optical input, in the current range.

The analog signal is always in the range 0 to 2V, 2V corresponding to a full

power input signal

in the current range

, 0V corresponding to no input signal.

If the range changes, for example, during autoranging, the level to which 2V

corresponds changes. Therefore it is recommended, if you want to use the

analog output, disable autoranging and select the best range for the application

5

with

4Up5or4

Down

.

Possible applications for the analog output, would be to close the feedback

loop controlling the current supplied to a laser; or to monitor optical power on

an oscilloscope (the analog signal reacts instantaneously to the input signal,

whereas the power shown on the display is subject to averaging).

Local Control - Measure Mode 2-13

2

The Modify Keys

You use these keys to edit parameters

.For the purposes of editing, there are

two types of parameter. One type is the parameter that can have one of several,

separate values, these are discrete valued parameters

parameter that can have any value between certain limits

. The second type is the

, these are continuous

valued parameters.

Editing Discrete Valued Parameters

When selecting one of several discrete values, the

value and the

Example

4+5

selects the next lowest value.

The averaging time can have only particular values. If you are

editing this parameter and it is currently 200ms, pressing

4*5

selects the next highest

5

4

*

changes the value to 500ms. If you are editing this parameter

5

and it is currently 200ms, pressing

changes the value to

4

+

100ms.

4)5

and

4(5

have no eect in the editing of discrete valued parameters.

Editing Continuous Valued Parameters

Where a value is being set from between certain limits, you can edit each

character individually.

The

5

changes the editable character to the next one on the left. The

4

(

5

4

)

changes the editable character to the next one on the right. The editable

characters include each digit of numeric parameters, the decimal point (see

below), and characters in messages. When a character is selected for editing it

blinks.

Pressing

4+5

decrements the editable character. The

4*5

increments the editable

character.

Editing Units

To edit the magnitude of Watt values, select the decimal point as the editable

5

character. Use the

5

to move the decimal point to the left, use

4

+

to move the

4

*

decimal point to the right.

When the decimal point reaches its rightmost or leftmost position, pressing the

key again changes the multiplier of the units.

2-14 Local Control - Measure Mode

Example

If you are editing a reference, and the value is 234.5W, with

the eld of edit at the decimal point, pressing

4+5

changes the

value to 2.345nW.

Similarly, if you are editing a reference, and the value is

2.345W, with the eld of edit at the decimal point, pressing

changes the value to 234.5mW.

2

4*5

Local Control - Measure Mode 2-15

3

Menu Mode

In menu mode the instrument oers several advanced test applications. When

the instrument is in this mode, the mode-indicator shows

MENU

. In this mode the

blue legends, above the keys, show the commands available to the user.

The Chan Key

4

5

selects the channel. This can be A or B. The channel- indicator, at the top

Chan

of the display, shows the selected channel.

Note

When the instrument is under remote control, this key acts as

Functions in the Menu mode apply only to the selected channel.

4

5

. That is,it

Local

returns the instrument to local control (unless Local Lockout is active).

3

The Mode Key

4

5

changes the operating mode. If you press this key in menu mode,it

Mode

changes the instrument into measure mode (the previous chapter gives a

description of measure mode).

Note

The commands described in this chapter can only be used when

the instrument is in Menu mode.

Local Control - Menu Mode 3-1

The System Key

4

5

System

changes the instrument to system mode (the next chapter gives a

description of system mode).

3

The Modify Keys

The section \The Modify Keys" in Chapter 2, gives a description of how to use

the Modify keys.

The Loss Key

4

5

starts the loss application. You need both a source and a sensor module to

Loss

run this application.

A loss measurement tells you how much of your optical signal you lose by

passing it through a device.You calculate loss by the following formula:

P

out

)

Loss

=10

log

To measure loss you need both quantities,P

(

P

in

in

dB

and P

. The application

out

measures Pinwhen you start it running. Once you have taken a reference, the

instrument expresses all the following results relative to this. These results are

loss results.

Preparation

You need both a source and a sensor module for the Loss application.

Before you start the Loss application, make sure that you have set all the

measurement-parameters that you use. It is most important to make sure that

you have setTfor the sensor andfor the source. If you are already in Menu

mode, you have to return to Measure mode to set these parameters.

3-2 Local Control - Menu Mode

Running the Loss Application

After pressing

4

5

, the instrument checks to see if both a source and sensor

Loss

module are present. If one or both are missing the character eld shows the

message

CONFIG ?

. The instrument does not enter the loss application.

If both modules are present:

The sensor wavelength is automatically set to the wavelength of the source.

(When you stop the application running, the parameters for the sensor are

automatically reset to the values in use before you started the application.)

The operation-indicator shows

APPL

, this stays lit while the instrument is in

the loss application.

The instrument shows

LOSS

in the character eld.

The instrument reads the reference level when you start the application

running. To read the input signal and use it as the reference

, do the following:

1. Make sure that the device under test is not in the system.

2. Make sure that the source is not active. The sourceisactive whenever the

green LED on its front panel lights.

3. Connect the source to the input of the system without the device under test.

4. Connect the output of the system to the sensor.

3

Figure 3-1. Measuring the Reference for the Loss Application

5. Press

4

Exec

5

.

The instrument takes the reference and then runs the application. While the

application is running, the

RUN

operation-indicator lights.

Local Control - Menu Mode 3-3

Warning

Do not look into the end of an optical cable attached to a

laser output when the device is operational.

3

Note

Once you have taken the reference, you can place the device under test into the

system.

Figure 3-2. Measuring the Loss of a Device Under Test (DUT)

Do not stop and restart the application as you insert and change devices

under test. Every time you start the application, the instrument takes a

new reference.You can switch the source o and on without disturbing the

reference value. Do this to avoid exposure to laser radiation when you are

changing the device under test.

Do not disconnect the ber from the source when making a loss

measurement. A small change in the coupling at the source can

introduce large errors into your measurement.

While the application is running, the result eld shows the loss,indB, and the

character eld shows the reference, in dBm. 1 indicates the result eld and 2

indicates the character eld in Figure 3-3. If you are using both wavelengths

of a dual wavelength source, the loss and reference for both wavelengths are

displayed. The loss and reference for the lower wavelength is shown on the

left. The loss and reference for the higher wavelength is shown on the right.

3-4 Local Control - Menu Mode

Figure 3-3. The Loss Result

4

5

stops the application running.

Exec

The Record Key

4

5

Record

number of samples in succession. There are three types of record application.

starts the record applications. Record applications allow you to take a

Stability takes samples at evenly spaced intervals over a specied period.

Logging takes a specied number of samples one immediately after the other.

That is, as soon as the rst sample has ended, the second starts.

3

Manual Logging takes a sample each time the user presses the

In addition, there are plot and print applications that allow you to make a

graphics plot, or a printout of the samples of your record application.

The nal application on the Record key is the MinMax application, which

displays minimum measured value and the dierence between this minimum

and the maximum measured value, for a changing power level.

Local Control - Menu Mode 3-5

4

Exec

5

key.

Preparation

You need a sensor module to perform any of the record applications.For the

stability, or either of the logging applications

is to have the device under test connected to the sensor.

3

Figure 3-4. Setup for a Record Application

To make a plot of the samples you need a HPGL plotter.To get a printout of

the samples you need a Thinkjet printer. If you are using a plotter or a printer,

it must be attached as the only device to the HP-IB connector on the back of

the instrument. The device address of the plotter must be set to 5. The device

address of the printer must be set to 1. To output to a printer or plotter, the

instrument HPIB State must be set to Talk Only (for instructions on how to do

this see \MODE" in Chapter 4).

, the only hardware setup you need

With Firmware revisions 1.7 and greater, to output to a printer or plotter, the

instrument HPIB State must be set to Talk Listen (the default condition). For

information on setting the HPIB Status, see \MODE" in Chapter 4.

Note

Before you start a record application, make sure that you have set all the

measurement-parameters that you use. It is most important to make sure that

3-6 Local Control - Menu Mode

To nd the rmware revision, switch o the instrument, and

then hold any key while the instrument is powering up. The

rmware revision is shown at the bottom right of the display.

Switch o the instrument and power it up again for normal

operation.

you have setTandfor the sensor. If you are already in Menu mode, you have

to return to Measure mode to set these parameters.

After pressing

4

5

Record

and

4

5

, you choose an application using

Record

4

5

choose the next of the record applications.

Next

4

Record

5,4

4

Prev

Next

5or4

Prev

5

chooses the

5

.

previous of the record applications. While you are in the record applications the

APPL

operation-indicator lights. The application is displayed in the character

eld of the selected channel.

The Stability Application

In the Stability application the instrument makes a number of evenly spaced

samples over a period specied by the user. The application rst takes

consecutive samples of the power from the device under test (that is, the next

sample begins as soon as the previous one has nished). Some of this data is

then discarded so that the samples are evenly spaced over the whole of the

specied period. The maximum number of samples is 500.

Example

is set to 1s (T

T

avg

isTset in Measure mode).

avg

The user sets the total time for the stability application to 8

minutes and 22 seconds. This is a total time of 502 seconds.

The instrument takes 502 samples, but discards every second

sample so that at the end, there are 251 evenly spaced samples.

When you select the Stability application the character eld shows

STABILTY

.

3

Figure 3-5. Selecting an Application : Stability

Local Control - Menu Mode 3-7

This application has two parameters.

application.

AUTODUMP

enables or disables the automatic plotting or printing

T_TOTAL

sets the total time for Stability

of the samples when the application nishes. All the other parameters

(Wavelength, T

Press

4

5

to look at, or edit the parameters. After pressing

Edit

parameters using

3

operation-indicator lights.

, etc.) use the values given to them in measure mode.

avg

4

Edit

4

5

and

4

5

Next

. While you are editing a parameter, the

Prev

5

, you can select

EDIT

T TOTAL

When you select this parameter, the left side character eld shows the message

T_TOTAL

. The right side character eld shows the value for the total time

.

You edit the time using the Modify keys. The lower limit for the time is 1

second. The higher limit for the total time is 99 hours

, 59 minutes and 59

seconds. The displayed value is always the setting for the total time. Due to

the way the measurements are taken, you may nd that the application runs

for a little longer than

T_TOTAL

depends on a number of factors including the system conguration.

T_TOTAL

. The dierence of the actual total time from

The worst case timing dierence is 30s/h.

You can press

4

5

if you have nished editing, or you can press

Edit

4

Next

5or4

Prev

to edit the other parameter.

AUTODUMP

When you select this parameter, the left side character eld shows the message

AUTODUMP

. The right side character eld shows whether the automatic dump

has been enabled. The dump can be a plot of the samples or a printout of the

samples. If the automatic dump is enabled the dump is made after the Stability

application has taken the last sample.

Note

Other applications also use the same

AUTODUMP

parameter.

Changing this parameter in the Logging application aects the

Stability application.

The Plot application sets the parameters for an automatic

plot. The Print application sets the parameters for an

automatic print. These applications are described later in this

chapter.

You should not enable automatic dumping to a printer or

plotter if there is a logging or stability application running in

the other channel. The automatic dump is given priority, and

3-8 Local Control - Menu Mode

5

the application in the other channel will be stopped for the

duration of the print or plot.

In the case of a logging application, the linearity of the timing

information is aected. In the case of a stability application,

no new data is recorded while the dump is being made.

You edit the dump enable using the Modify keys. It can have the value

to disable both the automatic plot and the automatic print,

the plot, or

PRINTER

, to enable the print. The displayed value is always the

PLOTTER

OFF

,

to enable

setting for the dump.

You can press

4

5

if you have nished editing, or you can press

Edit

4

Next

5or4

Prev

to edit the other parameter.

Running the Stability Application

5

To run the application, press

you are editing parameters. While the application is running, the

.You cannot run the application if

4

Exec

RUN

operation-indicator lights.

While the application is running, the result eld shows the sample, and the

character eld shows the time remaining until the application nishes. After all

the samples have been taken, the

4

5

suspends the running of the application. You can restart it by pressing

Pause

4

5

a second time. When you have pressed pause, you can look at the

Pause

RUN

operation-indicator switches o.

parameters set for the application in the Measure mode.You select parameters

with

4

5

and

4

5

Next

4

5

stops the application running.

Exec

Prev

.

3

5

Local Control - Menu Mode 3-9

The Logging Application

In the Logging application the instrument makes a number of consecutive

samples. The user species the number of samples

. Consecutive samples are

samples where one begins as soon as the previous one has nished.

3

When you select the Logging application the character eld shows

This application has several parameters.

that are to be taken.

AUTODUMP

enables or disables the automatic plotting or

printing of the samples when the application nishes.

SAMPLES

sets the number of samples

START

LOGGING

determines the

.

conditions that have to be met before the application starts taking samples.

THRESHLD

starts taking samples. All the other parameters (Wavelength, T

sets the threshold power that must be crossed before the application

, etc.) use the

avg

values given to them in measure mode.

5

5

Press

to look at, or edit the parameters. After pressing

4

Edit

parameters using

4

Next

5

and

5

. While you are editing a parameter, the

4

Prev

, you can select

4

Edit

EDIT

operation-indicator lights.

The total time for the logging application consists of the averaging time and the

time to process the sample. That is, a sample is only taken after the previous

sample has been taken and processed.

The processing time depends on a number of factors including the system

conguration. If any applications or measurements are running in the other

channel, the processing time between samples may vary.

On printer or plotter outputs, the total time given for the logging application

includes both the averaging and the processing time.

SAMPLES

When you select this parameter, the left side character eld shows the message

SAMPLES

. The right side character eld shows the number of samples to be

taken.

3-10 Local Control - Menu Mode

Figure 3-6. Editing an Application Parameter : Samples

You edit the number of samples using the Modify keys. The lower limit is 2.

The higher limit is 500. The displayed value is always the setting for the

number of samples.

3

You can press

4

5

if you have nished editing, or you can press

Edit

4

Next

5or4

Prev

to edit the other parameters.

AUTODUMP

When you select this parameter, the left side character eld shows the message

AUTODUMP

. The right side character eld shows whether the automatic dump

has been enabled. The dump can be a graphic plot of the samples or a printout

of the samples. If the automatic dump is enabled the dump is made after the

Stability application has taken the last sample.

Note

Other applications also use the

AUTODUMP

parameter. Changing

this parameter in the Logging application aects the Stability

application.

The Plot application sets the parameters for an automatic

plot. The Print application sets parameters for an automatic

print. These applications are described later in this chapter.

You should not enable automatic dumping to a printer or

plotter if there is a logging or stability application running in

the other channel. The automatic dump is given priority, and

the application in the other channel will be stopped for the

duration of the print or plot.

5

Local Control - Menu Mode 3-11

In the case of a logging application, the linearity of the timing

information is aected. In the case of a stability application,

no new data is recorded while the dump is being made.

You edit the dump enable using the Modify keys. It can have the values

3

the plot, or

PRINTER

, to enable the print. The displayed value is always the

to disable both the automatic plot and the automatic print,

PLOTTER

OFF

to enable

,

setting for the dump.

You can press

5

if you have nished editing, or you can press

4

Edit

4

Next

5or4

Prev

5

to edit the other parameter.

START

When you select this parameter, the left side character eld shows the message

START

. The right side character eld shows which of the start conditions has

5

been enabled. The application can be started immediately when you press

4

Exec

,

or it can be started when the input power-level is above or below a certain

threshold.

You edit the start condition using the Modify keys. It can have the values

IMMEDIAT

, to start the application when you press

4

Exec

5,ABOVE

to start the

application when the input power-level is above a certain threshold, or

BELOW

, to start the application when the input power-level is below a certain

threshold. The displayed value is always the setting for the start condition.

You can press

4

5

if you have nished editing, or you can press

Edit

4

Next

5or4

Prev

5

to edit the other parameter.

THRESHLD

You can only select this parameter when

START

is set to

ABOVEorBELOW

. When

you select this parameter, the left side character eld shows the message

THRESHLD

. The right side character eld shows the threshold that has to be

crossed before the application starts taking samples.

You edit the threshold using the Modify keys. The lower limit is -400.00dBm.

The higher limit is 400.00dBm. The displayed value is always the setting for

the threshold.

You can press

4

5

if you have nished editing, or you can press

Edit

4

Next

5or4

to edit the other parameters.

3-12 Local Control - Menu Mode

Prev

5

Running the Logging Application

To run the application, press

you are editing parameters. While the application is running, the

4

5

.You cannot run the application if

Exec

RUN

operation-indicator lights.

While the application is running, the result eld shows the sample, and the

character eld shows the number of samples that have been taken. After all the

samples have been taken, the

4

5

suspends the running of the application. You can restart it by pressing

Pause

5

4

a second time. When you have pressed pause, you can look at the

Pause

RUN

operation- indicator switches o.

parameters set for the application in the Measure mode.You select parameters

5

4

Prev

.

5

with

4

Exec

5

and

4

Next

stops the application running.

The Manual Logging Application

In the Manual Logging application the instrument takes a sample every time the

5

user presses

When you select the Logging application the character eld shows

Press

4

5

to look at the existing samples, or to take a sample again. After

Edit

pressing

4

Edit

editing samples, the

5

press

, the input power-level replaces the power-level logged for the

4

Exec

.

4

Exec

MAN LOGG

5

you can select a sample using the Modify keys. While you are

EDIT

operation- indicator lights.To take a sample again,

.

chosen sample.

3

5

Press

if you have nished editing.

4

Edit

Running the Manual Logging Application

While the application is running, the result eld shows the input power-level,

and the character eld shows the number of samples taken.

5

To take a sample, press

5

. When you press

4

Exec

the result is stored as the

4

Exec

next sample.

Example

The user is not currently editing samples. The character eld

shows

#61

, that is, 61 samples have been taken. On pressing

Local Control - Menu Mode 3-13

4

5

, the input power-level is read and stored as sample

Exec

number 62.

#62

is shown in the character eld.

While a sample is being taken, the

RUN

operation-indicator lights.

3

The Plot Application

In the Plot application the instrument takes the samples from a Stability or

Logging application and generates a plot of the samples.You can only plot

the samples from the most recent StabilityorLoggingorManual Logging

application.

To make a plot of the samples you need a HPGL plotter

. The plotter must

be attached as the only device to the HP-IB connector on the back of the

instrument. The device address of the plotter must be set to 5. T

plotter the instrument HPIB State must be set to T

alk Only (for instructions on

o output to a

how to do this see \MODE" in Chapter 4).

With Firmware revisions 1.7 and greater, to output to a printer or plotter, the

instrument HPIB State must be set to Talk Listen (the default condition). For

information on setting the HPIB Status, see \MODE" in Chapter 4.

Note

To nd the rmware revision, switch o the instrument, and

then hold any key while the instrument is powering up. The

rmware revision is shown at the bottom right of the display.

Switch o the instrument and power it up again for normal

operation.

When you select the Plot application the character eld shows

application has several parameters.

scaling of the plot.

Y_MAX

sets the maximum value on the y-axis of the plot.

Y_MIN

sets the minimum value on the y-axis of the plot.

AUTOSCAL

enables or disables automatic

COMMENT

character message printed on the plot for identication.

Press

4

5

to look at, or edit the parameters. After pressing

Edit

parameters using

4

Next

5

and

4

5

. While you are editing a parameter, the

Prev

operation-indicator lights.

3-14 Local Control - Menu Mode

PLOT

. This

is an eight

4

5

, you can select

Edit

EDIT

AUTOSCAL

When you select this parameter, the left side character eld shows the message

AUTOSCAL

. The right side character eld shows whether automatic scaling has

been enabled. If automatic scaling is enabled the instrument decides the best

limits for the y-axis by examining the samples.

You edit the automatic scaling enable using the Modify keys. It can have

the value

OFF

, to disable both automatic scaling, orON, to enable automatic

scaling. The displayed value is always the setting for the scaling.

3

You can press

4

5

if you have nished editing, or you can press

Edit

4

Next

5or4

Prev

to edit the other parameters.

The maximum and minimum values you choose for the graph, when autoscaling

is o, are subject to rounding. The nal scaling is calculated to give eleven

divisions of the y-axis with standard spacings (that is

, spacings that are multiples

of 1, 2 or 5).

Y MIN

You can only select this parameter when

select this parameter, the left side character eld shows the message

AUTOSCAL

is set to

OFF

. When you

Y_MIN

. The

right side character eld shows the minimum value for the y-axis of the plot.

You edit the y-axis minimum value using the Modify keys

. The lower limit is

-800.00dBm. The higher limit is 800.00dBm. The displayed value is always

the setting for the minimum.

You can press

4

5

if you have nished editing, or you can press

Edit

4

Next

5or4

Prev

to edit the other parameters.

Y MAX

You can only select this parameter when

select this parameter, the left side character eld shows the message

AUTOSCAL

is set to

OFF

. When you

Y_MAX

. The

right side character eld shows the maximum value for the y-axis of the plot.

5

5

You edit the y-axis maximum value using the Modify keys. The lower limit is

-800.00dBm. The higher limit is 800.00dBm. The displayed value is always

the setting for the maximum.

You can press

4

5

if you have nished editing, or you can press

Edit

4

Next

5or4

Prev

to edit the other parameters.

Local Control - Menu Mode 3-15

5

COMMENT

When you select this parameter the left side character eld shows the message

COMMENT

. The right side character eld shows the comment string. The comment

string is included so that you can identify the plot.

3

Note

Other applications in the same channel share the

COMMENT

parameter. Changing this parameter in the Plot application

aects the Print application.

You edit the comment using the Modify keys. There are eight characters in

the comment and each of these can be a number (0to9), a math symbol (-,

+

), a space, a letter (AtoZ), or punctuation symbols (!,?,.,,,:,;,&,|,@,

#,$,%,*,[,],

,or!). The displayed characters are always the setting for

the comment.

You can press

5

if you have nished editing, or you can press

4

Edit

4

Next

5or4

Prev

5

to edit the other parameters.

Running the Plot Application

To run the application, press

you are editing parameters. While the application is running, the

4

5

.You cannot run the application if

Exec

RUN

operation-indicator lights.

If you try to run the plot without samples or with invalid samples, the message

NO DATA

After the plot has nished, the

4

Exec

,or

DATA ?

5

stops the application running. The message

, shows in the character eld. The application does not run.

RUN

operation-indicator switches o.

ABORTED

shows in the

character eld.

Reading the Plot

Figure 3-7 shows a sample plot. The areas on this gure are:

The HP logo and the instrument number.

The type of record application that produce the samples. This is one of

STABILITY,LOGGING

,or

MAN LOGG

.

The comment. The message set up in the Plot application is included here on

the plot.

3-16 Local Control - Menu Mode

The rst column of data contains the parameters set in Measure mode. These

are

T avg

, the averaging time,

wavelength, and

included when the samples were taken as absolute values.

The second column of data contains the parameters set in Menu mode for

the application. These are

was taking samples, and

column is the data and time at which the record application was run.

The total time for the logging application consists of the averaging time

and the time to process the sample. That is, a sample is only taken after

the previous sample has been taken and processed. On the plot, the total

time given for the logging application includes both the averaging and the

processing time.

Reference

Cal Fact

, the reference power-level. The reference is not

T total

Samples

, the number of samples taken. Also in this

the calibration factor,

, the period for which the application

Wvl

, the

3

Local Control - Menu Mode 3-17

3

Figure 3-7. Stability Plot

The third column of data contains statistics based on the samples taken.

These are

power-level sampled,

maximum power-levels sampled, and

Max

, the maximum power-level sampled,

Diff

, the dierence between the minimum and

Avg

, the mean average of the samples.

Min

the minimum

Note

The quantity on the y-axis of the plot is always power. The units can be dBm,

dB,orWatts.

3-18 Local Control - Menu Mode

If the samples are taken in dB or dBm,

of these logarithmic values. If the samples are taken in Watts,

Avg

is the mean average of the linear values.

Avg

is the mean average

The quantity on the x-axis of the plot is time for the plot of samples from a

Stability or a Logging application, or the number of samples for the plot from

a Manual Logging application. The units of time can be seconds, minutes or

hours.

The plot is of the power as a function of time for the Stability or Logging

applications. The plot is of power as a function of the number of samples

taken for the Manual Logging application.

Horizontal dotted lines are drawn on the plot at the maximum, minimum and

average power-levels sampled. A vertical dotted line marks the nal sample.

The Print Application

In the Print application the instrument takes the samples from a Stability or

Logging application and generates a graphic printout of the samples.You can

only printout the samples from the most recent StabilityorLoggingorManual

Logging application, in the selected channel.

To make a printout of the samples you need a Thinkjet printer. The printer

must be attached as the only device to the HP-IB connector on the back of the

instrument. The device address of the printer must be set to 1. To output to a

printer the instrument HPIB State must be set to Talk Only (for instructions on

how to do this see \MODE" in Chapter 4).

3

With Firmware revisions 1.7 and greater, to output to a printer or plotter, the

instrument HPIB State must be set to Talk Listen (the default condition). For

information on setting the HPIB Status, see \MODE" in Chapter 4.

Note

To nd the rmware revision, switch o the instrument, and

then hold any key while the instrument is powering up. The

rmware revision is shown at the bottom right of the display.

Switch o the instrument and power it up again for normal

operation.

When you select the Print application the character eld shows

application has several parameters.

scaling of the plot.

Y_MAX

sets the maximum value on the y-axis of the plot.

Y_MIN

sets the minimum value on the y-axis of the plot.

AUTOSCAL

enables or disables automatic

COMMENT

PRINT

is an eight

. This

character message printed on the plot for identication.

Local Control - Menu Mode 3-19

Press

4

5

to look at, or edit the parameters. After pressing

Edit

parameters using

4

Next

5

and

operation- indicator lights.

AUTOSCAL

4

4

5

. While you are editing a parameter, the

Prev

5

, you can select

Edit

EDIT

3

When you select this parameter, the left side character eld shows the message

AUTOSCAL

. The right side character eld shows whether automatic scaling has

been enabled. If automatic scaling is enabled the instrument decides the best

limits for the y-axis by examining the samples.

Note

Other applications in the same channel share the

AUTOSCAL

parameter. Changing this parameter in the Print application

aects the Plot application.

You edit the automatic scaling enable using the Modify keys. It can have

the value

OFF

, to disable both automatic scaling, orON, to enable automatic

scaling. The displayed value is always the setting for the scaling.

You can press

4

5

if you have nished editing, or you can press

Edit

4

Next

5or4

Prev

5

to edit the other parameters.

The maximum and minimum values you choose for the graph, when autoscaling

is o, are subject to rounding. The nal scaling is calculated to give eleven

divisions of the y-axis with standard spacings (that is, spacings that are multiples

of 1, 2 or 5).

Y MIN

You can only select this parameter when

select this parameter, the left side character eld shows the message

AUTOSCAL

is set to

OFF

. When you

Y_MIN

. The

right side character eld shows the minimum value for the y-axis of the plot.

Note

Other applications in the same channel share the

Y_MIN

parameter. Changing this parameter in the Print application

aects the Plot application.

You edit the y-axis minimum value using the Modify keys. The lower limit is

-800.00dBm. The higher limit is 800.00dBm. The displayed value is always

the setting for the minimum.

3-20 Local Control - Menu Mode

You can press

4

5

if you have nished editing, or you can press

Edit

to edit the other parameters.

Y MAX

4

Next

5or4

Prev

5

You can only select this parameter when

select this parameter, the left side character eld shows the message

AUTOSCAL

is set to

OFF

. When you

Y_MAX

. The

right side character eld shows the maximum value for the y-axis of the plot.

Note

Other applications in the same channel share the

Y_MAX

parameter. Changing this parameter in the Print application

aects the Plot application.

You edit the y-axis maximum value using the Modify keys

. The lower limit is

-800.00dBm. The higher limit is 800.00dBm. The displayed value is always

the setting for the maximum.

You can press

5

if you have nished editing, or you can press

4

Edit

4

Next

5or4

Prev

to edit the other parameters.

COMMENT

When you select this parameter the left side character eld shows the message

COMMENT

. The right side character eld shows the comment string. The comment

string is included so that you can identify the plot.

Note

Other applications in the same channel share the

COMMENT

parameter. Changing this parameter in the Print application

aects the Plot application.

3

5

You edit the comment using the Modify keys. There are eight characters in

the comment and each of these can be a number (0to9), a math symbol (-,

+

), a space, a letter (AtoZ), or punctuation symbols (!,?,.,,,:,;,&,|,@,

#,$,%,*,[,],

,or!). The displayed characters are always the setting for

the comment.

You can press

5

if you have nished editing, or you can press

4

Edit

4

Next

5or4

to edit the other parameters.

Local Control - Menu Mode 3-21

Prev

5

Running the Print Application

To run the application, press

you are editing parameters. While the application is running, the

operation-indicator lights.

3

If you try to run the print without samples or with invalid samples, the message

NO DATA

After the print has nished, the

4

Exec

character eld.

Reading the Printout

The following gure shows a sample of the printout.

,or

DATA ?

5

stops the application running. The message

, shows in the character eld. The application does not run.

4

5

.You cannot run the application if

Exec

RUN

operation-indicator switches o.

ABORTED

RUN

shows in the

3-22 Local Control - Menu Mode

3

Figure 3-8. Logging Printout

The areas on the gure are:

The header contains the instrument number. Also in the printout header is

the data and time at which the record application was run.

The application parameters are given in three blocks. In the rst block is the

type of application that took the samples. This is one of

or

MANUAL LOGGING

.

STABILITY,LOGGING

Local Control - Menu Mode 3-23

,

Also in the rst block is the Measurement type, this describes the channel

used, and how the readings were made, for example,

absolute readings were made in channel A, or

B / REF

Ch. A (Absolute)

when

when relative readings

were made in channel B.

The last element in the rst block is the comment. The message set up in the

3

Plot application is here on the printout.

The second block of data contains the parameters set in Measure mode.

These are

wavelength, and

T avg

, the averaging time,

Reference

Cal Fact

the calibration factor,

Wvl

, the

, the reference power-level. The reference is not

included when the samples were taken as absolute values.

The third block of data contains the parameters set in Menu mode for the

application. These are

taking samples, and

T total

Samples

, the period for which the application was

, the number of samples taken.

The total time for the logging application consists of the averaging time and

the time to process the sample. That is, a sample is only taken after the

previous sample has been taken and processed. On the printout, the total

time given for the logging application includes both the averaging and the

processing time.

The nal block of data contains statistics based on the samples taken. These

are

Max

, the maximum power-level sampled,

sampled,

Diff

, the dierence between the minimum and maximum

power-levels sampled, and

Avg

, the mean average of the samples.

Min

the minimum power-level

Note

If the samples are taken in dB or dBm,

Avg

is the mean average

of these logarithmic values. If the samples are taken in Watts,

Avg

is the mean average of the linear values.

The printer now outputs a graph with the same format as the plot (see

Figure 3-7). That is,

The quantity on the y-axis of the graph is power. The units can be dBm, dB,

or Watts.

The quantity on the x-axis of the graph is time for the graph of samples from

a Stability or a Logging application, or the number of samples for the graph

from a Manual Logging application. The units of time can be seconds, minutes

or hours.

3-24 Local Control - Menu Mode

The graph is of the power as a function of time for the Stability or Logging

applications. The graph is of power as a function of the number of samples

taken for the Manual Logging application.

Horizontal dotted lines are drawn on the graph at the maximum, minimum

and average power-levels sampled.

The MinMax Applications

MinMax is only supplied with software versions 2.1 and later.

3

Note

To nd the rmware revision, switch o the instrument, and

then hold any key while the instrument is powering up. The

rmware revision is shown at the bottom right of the display.

Switch o the instrument and power it up again for normal

operation.

The MinMax applications are intended principally for polarization dependent

measurements, but can be used for other types of measurement.

MinMax measures the incoming power, and displays the minimum value

measured (at the bottom of the display), and the dierence between this

minimum and the maximum value measured (at the top of the display).

There are three modes of operation.

Continuous mode, which compares each new measured value with the

maximum and minimum values so far, and replaces them as necessary.

This mode is useful for measuring the Polarization Dependent Loss (PDL) of a

component. Run the application while sweeping the polarization of the source

applied to the component.

Window mode, which compares each new measured value with the maximum

and minimum values for the lastNsamples (N, the number of samples is set

by the user).

Refresh mode, which compares each new measured value with the maximum

and minimum values for the currentNsamples (N, the number of samples is

set by the user). The minimum and maximum are calculated and displayed for

one set of samples at a time, after the full set of samples have been measured.

Local Control - Menu Mode 3-25

The Window and Refresh modes are for use, for example, when you are

searching for or setting the position of minimum PDL.

Note

The length of the window

, or the refresh period must be shorter

than the rate at which you are changing the polarization, in this

case.

3

Figure 3-9. The Window and Refresh Modes

3-26 Local Control - Menu Mode

MODE

This is the parameter which chooses the mode,

CONT

selects the continuous mode,

WINDOW

REFRESH

selects the Window mode, and

selects the Refresh mode.

SAMPLES

This is the parameter which sets the length of the Window or Refresh mode.

It is possible to use up to 500 samples in the Window mode.

It is possible to use up to 10000 samples in the Refresh mode.

The length of the window or the refresh period is set by the number of samples,

and the averaging time. The averaging time is set in Measure mode.

Running the MinMax Application

5

To run the application, press

editing parameters (press

4

Edit

application is running, the

RUN

.You cannot run the application if you are

4

Exec

5

again, to nish editing parameters). While the

operation-indicator lights.

While the application is running, the result eld shows the dierence between

minimum and maximum measurements, and the character eld shows the

minimum measurement.

4

5

suspends the running of the application. While the application is paused,

Pause

the power level is shown in the result eld. You can restart the MinMax

5

application by pressing

4

a second time.

Pause

3

4

5

stops the application running.

Exec

Local Control - Menu Mode 3-27

The More Key

4

5

gets you into the other applications. The full list of these applications

More

depends on the modules that you have installed. There are two that are

standard, these come with the mainframe. They are the show and the alignment

applications.

3

After pressing

4

5

, you choose an application using

More

acts in the same way as

4

5,4

Next

4

5

. The application is displayed in the character eld

Next

More

5or4

Prev

5.4

More

5

of the selected channel.

The Show Application

In the Show application you can look at the samples from a Stability or Logging

application. You can only look at the samples from the most recent Stability

or

LoggingorManual Logging application.

When you select the Show application the character eld shows

application has no parameters that can be modied.

Press

4

5

to look at the stored values. While you are looking at the stored

Edit

values, the

you use

4

Prev

EDIT

operation-indicator lights.To move from one value to another

5

and

4

5

.

Next

MAXIMUM

When

MAXIMUM

shows in the left side character eld, the value in the right side

character eld is the maximum power-level sampled.

MINIMUM

When

MINIMUM

shows in the left side character eld, the value in the right side

character eld is the minimum power-level sampled.

SHOW

. This

3-28 Local Control - Menu Mode

DIFF

When

DIFF

shows in the left side character eld, the value in the right

side character eld is the dierence between the minimum and maximum

power-levels sampled.

AVERAGE

When

AVERAGE

shows in the left side character eld, the value in the right side

character eld is the mean average of the samples.

Note

If the samples are taken in dB or dBm,

Avg

is the mean average

of these logarithmic values. If the samples are taken in Watts,

Avg

is the mean average of the linear values.

#1

When

#1

shows in the left side character eld, the value in the right side

character eld is the rst of the samples taken. To examine the rest of the

samples, use the Modify keys. In this case the Modify keys operate on the value

in the left side character eld.

The Alignment Application

The Alignment application simplies the alignment of two optical components to

get the best transfer of power from one to the other.

3

Preparation

You need a sensor module to perform the Alignment application. The only

hardware setup you need is to have the device under test connected to the

sensor.

Local Control - Menu Mode 3-29

3

Figure 3-10. Setup for an Alignment Application

Before you start the Alignment application, make sure that you have set all the

measurement-parameters that you use. It is most important to make sure that

you have setTandfor the sensor. If you are already in Menu mode, you have

to return to Measure mode to set these parameters.

When you select the Alignment application the character eld shows

This application has several parameters.

TYPE

sets whether the instrument

ALIGNMNT

automatically records the maximum power-level, or the user sets the

maximum power-level.

bar.

MAXPOWER

(Wavelength, T

Press

4

Edit

sets the maximum power- level. All the other parameters

avg

5

to look at, or edit the parameters. After pressing

parameters using

DELTA

sets the range of power shown by the graphic

, etc.) use the values given to them in measure mode.

5

, you can select

4

Edit

5

4

Next

5

and

. While you are editing a parameter, the

4

Prev

EDIT

operation-indicator lights.

TYPE

When you select this parameter, the left side character eld shows the message

TYPE

. The right side character eld shows whether the automatic recording of

the maximum power-level has been enabled.

You edit the mode using the Modify keys. It can have the values

enable the automatic recording of the maximum power- level, or

AUTO

,to

MANUAL

,

where the user sets the maximum power-level. The displayed value is always

the setting for the mode.

3-30 Local Control - Menu Mode

.

You can press

4

5

if you have nished editing, or you can press

Edit

to edit the other parameters.

DELTA

4

Next

5or4

Prev

5

When you select this parameter

DELTA

. The right side character eld shows the value for the delta.

You edit the delta using the Modify keys

, the left side character eld shows the message

. The lower limit is 0.01dB. The

higher limit is 13.00dB. The displayed value is always the setting for the delta.

You can press

4

5

if you have nished editing, or you can press

Edit

4

Next

5or4

to edit the other parameters.

MAXPOWER

You can only select this parameter when

this parameter, the left side character eld shows the message

TYPE

is set to

MANUAL

. When you select

MAXPOWER

. The

right side character eld shows the setting for the maximum power.

You edit the maximum power using the Modify keys. The lower limit is

-400.00dBm. The higher limit is 400.00dBm. The displayed value is always

the setting for the maximum.

You can press

5

if you have nished editing, or you can press

4

Edit

4

Next

5or4

to edit the other parameters.

Running the Alignment Application

To run the application, press

you are editing parameters. While the application is running, the

4

5

.You cannot run the application if

Exec

RUN

operation-indicator lights.

Prev

Prev

3

5

5

While the application is running, the left side result eld shows the maximum

power-level. If

input power-level read since the application started. If

the maximum power-level is set by

TYPE

is set to

AUTO

, the maximum power-level is the maximum

TYPE

is set to

MAXPOWER

. The right side result eld shows

MANUAL

the input power-level, in dB, relative to the maximum power-level.

Local Control - Menu Mode 3-31

,

3

Figure 3-11. The Display during the Alignment Application

The character eld shows the input power-level graphically. The right end

of the character eld always represents the maximum power-level. The left

end of the character eld represents P

power-level, and 1P is determined by

When the the graph is seven dots high, 1P is equal to

1P is now equal to half the value of

high. If you press

4*5

a second time, 1P is equal to a quarter the value of

max

DELTA

DELTA

0

1P, where P

. Pressing

DELTA

is the maximum

max

4*5

and

4+5

. If you press

changes 1P.

and the graph is shown ve dots

4*5

,

DELTA

and the graph is shown three dots high.

Example

DELTA

is set to 1.00dB.

MAXPOWER

is set to 1.00dBm.

The right end of the graph represents 1.00dBm. At the start of

the application The left end of the graph represents 0.00dBm.

4*5

is pressed twice.

The left end of the graph represents 0.75dBm. The graph is

three dots high.

4+5

is pressed once.

The left end of the graph represents 0.50dBm. The graph is ve

dots high.

If only the last column of dots on the left is lit, the power-level is outside the

limits set by P

5

enables and disables the tone. The frequency of the tone increases with

4

Pause

max

0

1P and P

max

input power-level. The lowest frequency corresponds to the left side of the

power graph in the character eld. The highest frequency corresponds to the

right side of the power graph in the character eld. If the power-level is outside

the limits set by P

max

0

1P and P

, no tone sounds.

max

3-32 Local Control - Menu Mode

4

5

stops the application running.

Exec

3

Local Control - Menu Mode 3-33

4

System Mode

System mode is where you set the congurations that aect the instrument as a

whole. When you activate system mode, the mode- indicator shows

the top of the display.

The Mode Key

4

5

selects the operating mode. Pressing this key when in the system mode

Mode

transfers operation to Measure mode.

MENU SYS

at

4

Note

The Modify Keys

See \The Modify Keys" in Chapter 2 for details on how to use the modify keys.

The commands described in this chapter can only be used when

the instrument is in System mode.

Local Control - System Mode 4-1

The System Key

4

5

System

using

selects the parameter-set for modication. You choose a parameter-set

4

Next

5,4

System

5or4

Prev

5.4

System

5

acts in the same way as

4

5

. The current

Next

application is displayed in the character eld of the current channel.

Note

The conguration information is held in memory until the next

time you specically modify it. It is not aected by the power

to the instrument being switched o.

4

RECALL

The recall function sets a channel conguration according to data that has been

stored in memory. When you select the recall function, the left side character

eld shows the message

RECALL

.

Figure 4-1. Making a Selection in System Mode : the Recall Function

There are three parameters for this function. The module type that the

conguration was saved for, the location where the conguration was saved,

and the channel to set with the conguration.

5

Press

to look at or edit the parameters. All of the parameters are displayed

4

Edit

at the same time in the right side character eld. You can select between the

location and the channel using

While you are editing parameters, the mode-indicator shows

Press

4

5

to make a recall of the selected data.

EXEC

4(5

and

4)5

.You cannot edit the module type.

MENU SYS EDIT

4-2 Local Control - System Mode

.

The Module Type

The module type is indicated by the last two numeric digits of the product

number. Not all locations have a module type. That is, the standard setting,

and locations that have not been used to store conguration data do not have a

module type parameter.You must have the correct module type in the selected

channel to make a recall. If you do not, the message

MISMATCH

will be shown

when you try to make a recall.

The Location

The location where the conguration data is stored is a number between 0 and

9. This number is displayed to the left of the arrow.

You edit the location using the Modify keys. The location used for the recall is

the displayed value.

Location 0 always contains the standard setting. The standard setting is:

Parameter Setting

Sensor

4



Module dependent.

CAL 0.000dB.

T 200ms (500ms for Head Interface Module).

REF 1000.0W.

Auto Ranging Enabled.

Units Watts

Display Full Resolution

Source



Module dependent, lower wavelength for dual wavelength

source.

ATT 0.0dB.

AUX CW.

Output Disabled.

The Channel

This is either the letterAor the letterB. It is displayed to the right of the arrow.

You must have the correct module type in the selected channel to make a recall.

Local Control - System Mode 4-3

If you do not, the message

MISMATCH

will be shown when you try to make a

recall.

You edit the channel using the Modify keys. The channel that will be set by the

data is the displayed value.

Example

The character eld shows the message

You press

4

Exec

5

.

RECALL '54 3!A

.

If there is an HP 81554SM in channel A, channel A will be

congured according to the data in location 3.

STORE

4

The store function stores the instrument conguration in memory

. When you

select the store function, the left side character eld shows the message

STORE

.

There are three parameters for this function. The module type for which the

last save to this location was made, the channel for which the information is to

be saved, and the location where the data is to be saved.

5

Press

to look at or edit the parameters. All of the parameters are displayed

4

Edit

at the same time in the right side character eld. You can select between the

location and the channel using

While you are editing parameters, the mode-indicator shows

4(5

and

4)5

.You cannot edit the module type.

MENU SYS EDIT

.

Figure 4-2. Editing a Parameter in System Mode

Press

4

5

to make a store with the selected parameters.

EXEC

4-4 Local Control - System Mode

The Module Type

The module type is shown for the last data that was stored in the selected

location. If no data has been stored in a location, this information is blank. The

module type is indicated by the last two numeric digits of the product number.

The Channel

This is either the letterAor the letterB. It is displayed to the left of the arrow.

You edit the channel using the Modify keys. The channel data that will be saved

is the displayed value.

The Location

The location where the conguration data will be stored is a number between 1

and 9. This number is displayed to the right of the arrow.

You edit the location using the Modify keys. The location used for the recall is

the displayed value.

Example

The character eld shows the message

You press

4

Exec

5

.

STORE '54 3!A

.

If there is an HP 81554SM in channel A, channel A will be

congured according to the data in location 3.

HPIB

The HP-IB conguration sets the parameters aecting how the instrument is

remotely controlled. When you select the HP-IB conguration, the left side

character eld shows the message

There are three parameters for this conguration. These are

the HP-IB address of the instrument,

talk-only operation, and

LANGUAGE

HPIB

.

ADDRESS

MODE

, to set the instrument to control or

, to set

, to set the type of commands that are used

by the instrument.

5

5

Press

to look at or edit the parameters. After pressing

4

Edit

select parameters using

mode-indicator shows

5

and

4

Next

4

Prev

MENU SYS EDIT

5

. While you are editing a parameter, the

.

4

Edit

, you can

4

ADDRESS

When you select this parameter, the left side character eld shows the message

ADDRESS

. The right side character eld shows the setting for the device address

of the instrument.

Local Control - System Mode 4-5