HP EPM-441A, EPM E4418A User Manual

A

Document Part Number 5971-2669
Printed in the UK September 2004

Errata

This manual may contain references to HP or Hewlett-Packard. Please note that Hewlett-Packard's former test and
measurement, semiconductor products and chemical analysis businesses are now part of Agilent Technologies. To
reduce potential confusion, the only change to product numbers and names has been in the company name prefix: where
a product number/name was HP XXXX the current name/number is now Agilent XXXX. For example, model number
HP8648 is now model number Agilent 8648.

Ce manuel peut contenir des références à <<HP>> ou <<Hewlett-Packard.>> Veuillez noter que les produits de test et
mesure, de semi-conducteur et d'analyse chimique qui avaient fait partie de la société Hewlett-Packard sont maintenent
une partie de la société Agilent Technologies. Pour reduire la confusion potentielle, le seul changement aux noms de
reference a été dans le préfixe de nom de société : là où un nom de référence était HP XXXX, le nouveau nom de
référence est maintenant Agilent XXXX. Par example, le HP 8648 s'appelle maintenent Agilent 8648.

Diese Gebrauchsanweiseung kann Bezug nehmen auf die Namen HP oder Hewlett-Packard. Bitte beachten Sie, dass
ehemalige Betriebsbereiche von Hewlett-Packard wie HP-Halbleiterprodukte, HP-chemische Analysen oder HP-Test­und Messwesen nun zu der Firma Agilent Technology gehören. Um Verwirrung zu vermeiden wurde lediglich bei
Produktname und - Nummer der vo laufende Firmenname geändert: Produkte mit dem Namen/Nummer HP XXXX
lauten nun mehr Agilent XXXX. Z.B, das Modell HP 8648 heißt nun Agilent 8648.

Questo manuale potrebbe contenere riferimenti ad HP o Hewlett-Packard. Si noti che le attività precedentemente gestite
da Hewlett-Packard nel campo di Test & Misura, Semiconduttori, ed Analisi Chimica sono ora diventate parte di
Agilent Technologies. Al fine di ridurre il rischio di confusione, l'unica modifica effettuata sui numeri di prodotto e sui
nomi ha riguardato il prefisso con il nome dell'azienda : dove precedentemente compariva "HP XXXX" compare ora
"Agilent XXXX". Ad esempio: il modello HP8648 è ora indicato come Agilent 8648.

Este manual puede hacer referencias a HP o Hewlett Packard. Las organizaciones de Prueba y Medición (Test and
Measurement), Semiconductores (Semiconductor Products) y Análisis Químico (Chemical Analysis) que pertenecían a
Hewlett Packard, ahora forman parte de Agilent Technologies. Para reducir una potencial confusión, el único cambio en
el número de producto y nombre, es el prefijo de la compañía: Si el producto solía ser HP XXXX, ahora pasa a ser
Agilent XXXX. Por ejemplo, el modelo HP8648 es ahora Agilent 8648.

Advanced Test Equipment Rentals

www.atecorp.com 800-404-ATEC (2832)

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マニュアル・チェンジ

変更

本文中の「HP（YHP）」、または「(横河)ヒューレット・パッカード株式会社」という語句を、「Agilent」、

または「アジレント・テクノロジー株式会社」と変更してください。

ヒューレット・パッカード社の電子計測、半導体製品、化学分析ビジネス部門は分離独立し、アジ

レント・テクノロジー社となりました。

社名変更に伴うお客様の混乱を避けるため、製品番号の接頭部のみ変更しております。

（例: 旧製品名 HP 4294A は、現在 Agilent 4294A として販売いたしております。）

HP4402.book : title.fm i Tue Apr 22 15:20:23 1997

User’s Guide

HP EPM E4418A (EPM-441A)

Power Meter

HP Part no. E4418-90000

April 22, 1997

HP4402.book : title.fm ii Tue Apr 22 15:20:23 1997

© Copyright Hewlett-Packard Company
All rights reserved. Reproduction, adaptation, or translation without prior

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

Printed in the UK.

ii HP EPM-441A User’s Guide

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Legal Information

Notice

Information contained in this document is subject to change without
notice. Hewlett-Packard makes no warranty of any kind with regard to
this material, including, but not limited to, the implied warranties of
merchantability and fitness for a particular purpose. Hewlett-Packard
shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishings, performance,
or use of this material. No part of this document may be photocopied,
reproduced, or translated to another language without the prior written
consent of HP.

Legal Information

Certification

Hewlett-Packard Company certifies that this product met its published
specifications at the time of shipment from the factory. Hewlett-Packard
further certifies that its calibration measurements are traceable to the
United States National Institute of Standards and Technology, to the
extent allowed by the Institute’s calibration facility, and to the calibration
facilities of other International Standards Organization members.

Warranty

This Hewlett-Packard instrument product is w arranted against defects in
material and workmanship for a period of one year from date of shipment.
During the warranty period, Hewlett-Packard Company will at its option,
either repair or replace products which prove to be defective. F or w arranty
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, duties, and taxes for products returned to HP
from another country. HP warrants that its software and firmware
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, or firmware
will be uninterrupted or error free.

HP EPM-441A User’s Guide iii

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Legal Information

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 modification or misuse, operation outside of the
environmental specifications for the product, or improper site preparation
or maintenance. NO OTHER WARRANTY IS EXPRESSED OR IMPLIED .
HP SPECIFICALLY 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. HP SHALL NOT BE LIABLE FOR ANY
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY
OTHER LEGAL THEORY.

iv HP EPM-441A User’s Guide

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Equipment Operation

Warnings and Cautions

This guide uses warnings and cautions to denote hazards.

WARNING A warning calls attention to a procedure, practice or the

like, which, if not correctly performed or adhered to, could
result in injury or the loss of life. Do not proceed beyond a
warning until the indicated conditions are fully
understood and met.

Equipment Operation

Caution A caution calls attention to a procedure, practice or the like which,

if not correctly performed or adhered to, could result in damage to
or the destruction of part or all of the equipment. Do not proceed
beyond a caution until the indicated conditions are fully
understood and met.

Personal Safety Considerations

WARNING This is a Safety Class I product (provided with a protective

earthing ground incorporated in the power cord). The
mains plug shall only be inserted in a socket outlet
provided with a protective earth contact. Any interruption
of the protective conductor, inside or outside the
instrument, is likely to make the instrument dangerous.
Intentional interruption is prohibited.
If this instrument is not used as specified, the protection
provided by the equipment could be impaired. This
instrument must be used in a normal condition (in which
all means of protection are intact) only.
No operator serviceable parts inside. Refer servicing to
qualified personnel. To prevent electrical shock, do not
remove covers.
For continued protection against fire hazard, replace the
line fuse(s) only with fuses of the same type and rating (for
example, normal blow, time delay, etc.). The use of other
fuses or material is prohibited.

HP EPM-441A User’s Guide v

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General Safety Considerations

General Safety Considerations

WARNING Before this instrument is switched on, make sure it has

been properly grounded through the protective conductor
of the ac power cable to a socket outlet provided with
protective earth contact.
Any interruption of the protective (grounding) conductor,
inside or outside the instrument, or disconnection of the
protective earth terminal can result in personal injury.

Caution Any adjustments or service procedures that require operation of

the instrument with protective covers removed should be
performed only by trained service personnel.

Markings

ISM

GROUP 1

CLASS A

The CE mark shows that the product complies with
all the relevant European legal Directives (if
accompanied by a year, it signifies when the design
was proven.

This is the symbol of an Industrial Scientific and
Medical Group 1 Class A product.

The CSA mark is a registered trademark of the
Canadian Standards Association.

External Protective Earth Terminal.

While this is a Class I product, provided with a
protective earthing conductor in a power cord, an
external protective earthing terminal has also been
provided. This terminal is for use where the earthing
cannot be assured. At least an 18AWG earthing
conductor should be used in such an instance, to
ground the instrument to an assured earth terminal.

vi HP EPM-441A User’s Guide

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IEC 1010-1 Compliance

This instrument has been designed and tested in accordance with IEC
Publication 1010-1 +A1:1992 Safety Requirements for Electrical
Equipment for Measurement, Control and Laboratory Use and has been
supplied in a safe condition. The instruction documentation contains
information and warnings which must be followed by the user to ensure
safe operation and to maintain the instrument in a safe condition.

General Safety Considerations

HP EPM-441A User’s Guide vii

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Regulatory Information

Regulatory Information

Sound Emission

Herstellerbescheinigung

Diese Information steht im Zusammenhang mit den Anforderungen der
Maschinenlarminformationsverordnung vom 18 Januar 1991.

• Sound Pressure LpA < 70 dB.

• Am Arbeitsplatz.

• Normaler Betrieb.

• Nach DIN 45635 T. 19 (Typprufung).

Manufacturers Declaration

This statement is provided to comply with the requirements of the
German Sound DIN 45635 T. 19 (Typprufung).

• Sound Pressure LpA < 70 dB.

• At operator position.

• Normal operation.

• According to ISO 7779 (Type Test).

Australian EMC Regulations

The C-Tick mark is a registered trademark of the Spectrum Management
Agency of Australia. This signifies compliance with the Australian EMC
Framework Regulations under the terms of the Radiocommunications Act
of 1992.

viii HP EPM-441A User’s Guide

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Declaration of Conformity

DECLARATION OF CONFORMITY

according to ISO/IEC Guide 22 and EN45014

Manufacturer’s Name: Hewlett-Packard Limited.

Manufacturer’s Address: Queensferry Microwave Division

South Queensferry,
West Lothian, EH30 9TG.
Scotland, United Kingdom.

Declares that the product:
Product Name: Power Meter
Model Number(s): HP EPM-441A and HP EPM-442A
Product Option(s): All

Declaration of Conformity

Conforms to the following Product Specifications:
Safety : EN61010-1:1993/IEC 1010-1:1990+A1/CSA C22.2

No. 1010-1:1993
EN60825-1:1994/IEC 825-1:1993 Class 1

EMC : EN 55011:1991/CISPR11:1990, Group 1-Class A

EN 50082-1:1992

Supplementary Information:

The product herewith complies with the requirements of the Low Voltage Directive 72/23/EEC and
the EMC Directive 89/336/EEC and carries the CE-marking accordingly.

South Queensferry, Scotland December 1 1996

Location Date R.M. Evans/Quality Manager

European Contact:

Your local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Department ZQ / Standards
Europe, Herrenberger Strasse 130, D-7030 Boeblingen, Germany (FAX [phone])

HP EPM-441A User’s Guide ix

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List of Related Publications

List of Related Publications

The HP EPM-441A User’s Guide is also available in the following
languages:

• English Language User’s Guide - Standard

• German Language User’s Guide - Option ABD

• Spanish Language User’s Guide - Option ABE

• French Language User’s Guide - Option ABF

• Italian Language User’s Guide - Option ABZ

• Japanese Language User’s Guide - Option ABJ

HP EPM-441A/442A Programming Guide is shipped as standard.
HP EPM-441A/442A Service Guide is available by ordering Option 915.
HP EPM-441A/442A CLIPs (Component Location and Information Pack)

is available by ordering E4418-90007.
Useful information on SCPI (Standard Commands for Programmable

Instruments) can be found in:

• A Beginner’s Guide to SCPI, which is available by ordering
HP Part Number 5010-7166.

• The SCPI reference manuals which are available from:
SCPI Consortium,
8380 Hercules Drive, Suite P3,
La Mesa, CA 91942, USA.
Telephone: [phone]
Fax: [phone]

x HP EPM-441A User’s Guide

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HP EPM-441A Options

The HP EPM-441A power meters have the following options available:

• Option 002, supplies parallel rear panel sensor input(s). The
power reference oscillator output is on the front panel.

• Option 003, supplies parallel rear panel sensor input(s). The
power reference oscillator output is also on the rear panel.

• Option 004, deletes the HP 11730A sensor cable(s) provided.

• Option 0BO, deletes manual set.

• Option 908, provides rackmount kit for one instrument.

• Option 909, provides rackmount kit for two instruments.

• Option 915, provides the HP EPM-441A/442A Service Guide.

• Option 916, provides an additional HP EPM-441A User’s Guide
and HP EPM-441A/442A Programming Guide.

• Option 1BN, provides MIL-STD 45662A, ANSI/NCSL Z540-1-1994
Certificate of Calibration.

• Option 1BP, provides MIL-STD-45662A, ANSI/NCSL Z540-1-1994
Certificate of Calibration and data.

HP EPM-441A Options

Available Accessories

• HP 34161A Accessory Pouch

• The following HP power sensor cables are available:

■ HP 11730A 1.5 m (7.5 ft)

■ HP 11730B 3 m (10 ft)

■ HP 11730C 6.1 m (20 ft)

■ HP 11730D 15.2 m (50 ft)

■ HP 11730E 30.5 m (100 ft)

■ HP 11730F 61 m (200 ft)

HP EPM-441A User’s Guide xi

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About this Guide

About this Guide

Chapter 1: Getting Started

This chapter prepares the power meter for use and helps you to get
familiar with a few of the front panel features.

Chapter 2: Power Meter Operation

This chapter gives a detailed description of the capabilities and operation
of the power meter. You will find this chapter useful when you are
operating the power meter from the front panel.

Chapter 3: Menu Map Reference

This chapter details diagrammatically the menu maps for the power
meter. It also gives a description of all the power meter’s keys.

Chapter 4: Error Messages

This chapter lists the error messages that may appear as you are working
with the power meter. Each description contains information to help you
diagnose and solve the problem.

Chapter 5: Specifications

This chapter lists the power meter’s specifications and describes how to
interpret these specifications.

xii HP EPM-441A User’s Guide

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Table of Contents

Legal Information ........................................................................iii

Equipment Operation................................................................... v

Personal Safety Considerations............................................. v

General Safety Considerations.................................................... vi

Markings................................................................................vi

IEC 1010-1 Compliance........................................................ vii

Regulatory Information.............................................................viii

Sound Emission...................................................................viii

Australian EMC Regulations..............................................viii

Declaration of Conformity........................................................... ix

List of Related Publications ......................................................... x

HP EPM-441A Options................................................................xi

Available Accessories ............................................................xi

About this Guide.........................................................................xii

Page

Getting Started.................................................................................... 1-1

Introduction................................................................................... 1-2

Turning On the Power Meter....................................................... 1-3

The Front Panel at a Glance ........................................................ 1-4

The Display Layout....................................................................... 1-7

Selecting Your Display Layout.............................................. 1-9

Window Symbols...........................................................................1-12

Warning Symbol..................................................................... 1-12

Confirmation Window ............................................................ 1-12

Wait Symbol............................................................................ 1-12

1 of N Entry Window.............................................................. 1-13

Numeric or Alphanumeric Entry Window............................ 1-13

The Rear Panel at a Glance................................................... 1-14

Adjusting the Carrying Handle............................................. 1-15

Rack Mounting the Power Meter........................................... 1-16

Power Meter Operation.....................................................................2-1

Introduction................................................................................... 2-2

Zeroing the Power Meter.............................................................. 2-3

Calibrating the Power Meter........................................................ 2-4

HP EPM-441A User’s Guide Contents-1

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Calibration Procedure Using HP E-Series

Power Sensors......................................................................... 2-5

Calibration Procedure using HP 8480 Series

Power Sensors......................................................................... 2-5

Making Measurements with the HP E-Series

Power Sensors............................................................................... 2-8

Procedure................................................................................ 2-8

Making Measurements with the HP 8480 Series

Power Sensors............................................................................... 2-10

Procedure................................................................................ 2-10

Making Measurements using Sensor Calibration Tables........... 2-12

Selecting a Sensor Calibration Table.................................... 2-12

Making the Measurement...................................................... 2-13

Editing Sensor Calibration Tables........................................ 2-14

Setting the Units of Measurement............................................... 2-20

Selecting Units of Measurement from the Softkeys ................... 2-21

Making Relative Measurements.................................................. 2-22

Procedure................................................................................ 2-22

Setting the Resolution.................................................................. 2-23

Setting Offsets............................................................................... 2-24

Setting Channel Offsets.........................................................2-24

Setting Display Offsets .......................................................... 2-24

Setting Averaging......................................................................... 2-26

Measuring Pulsed Signals............................................................ 2-28

Setting Measurement Limits ....................................................... 2-30

Checking for Limit Failures................................................... 2-31

Selecting a Digital or Analog Display.......................................... 2-33

Setting the Range ......................................................................... 2-36

Configuring the Remote Interface................................................ 2-37

HP-IB Address........................................................................ 2-37

Programming Language Selection ........................................ 2-38

Recorder Output............................................................................ 2-39

Leveling a Source Output ...................................................... 2-40

Saving and Recalling Power Meter Configurations....................2-41

How Measurements are Calculated............................................. 2-43

Presetting the Power Meter ......................................................... 2-44

Preset Conditions ................................................................... 2-44

................................................................................................. 2-45

Self Test......................................................................................... 2-46

Power On Self Test................................................................. 2-46

Front Panel Selection of Self Tests........................................ 2-47

HP-IB Testing......................................................................... 2-49

Test Descriptions.................................................................... 2-50

Contents-2 HP EPM-441A User’s Guide

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Operator Maintenance.................................................................. 2-52

Replacing the Power Line Fuse............................................. 2-52

Contacting Hewlett-Packard........................................................ 2-53

Before calling Hewlett-Packard............................................. 2-53

Check the Basics..................................................................... 2-54

Instrument serial numbers.................................................... 2-54

Sales and Service Offices ....................................................... 2-56

Returning Your Power Meter for Service.............................. 2-59

Menu Reference................................................................................... 3-1

Introduction................................................................................... 3-2

The Front Panel Menu Maps ....................................................... 3-3

dBm/W Menu..........................................................................3-3

Frequency/Cal Fac Menu....................................................... 3-4

Meas Setup Menu................................................................... 3-4

Rel/Offset Menu...................................................................... 3-5

Save/Recall Menu................................................................... 3-5

System Inputs Menu.............................................................. 3-6

System Inputs Menu Continued............................................ 3-7

Zero/Cal Menu ........................................................................ 3-8

Front Panel Menu Reference........................................................ 3-9

Diagrammatical Hardkeys..................................................... 3-24

Error Messages .................................................................................... 4-1

Introduction................................................................................... 4-2

Error Messages ............................................................................. 4-4

Specifications....................................................................................... 5-1

Introduction................................................................................... 5-2

Power Meter Specifications.......................................................... 5-3

Meter.......................................................................................5-3

Accuracy.................................................................................. 5-4

Power Reference ..................................................................... 5-5

Power Meter Supplemental Characteristics................................ 5-6

Power Reference ..................................................................... 5-6

Measurement Speed...............................................................5-6

Zero Drift of Sensors............................................................... 5-7

Measurement Noise................................................................ 5-7

Settling Time.......................................................................... 5-9

Power Sensor Specifications .................................................. 5-12

General Characteristics................................................................ 5-13

Rear Panel Connectors........................................................... 5-13

Environmental Characteristics.................................................... 5-14

General Conditions................................................................. 5-14

HP EPM-441A User’s Guide Contents-3

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Operating Environment.........................................................5-14

Storage Conditions................................................................. 5-14

General.......................................................................................... 5-15

Dimensions ............................................................................. 5-15

Weight.....................................................................................5-15

Safety ...................................................................................... 5-15

Remote Programming ............................................................ 5-15

Non-Volatile Memory............................................................. 5-16

Contents-4 HP EPM-441A User’s Guide

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List of Figures

2-1 “Sensor Tbls” Screen.................................................................. 2-13

2-2 “Edit Cal” Screen ....................................................................... 2-14

2-3 Effect of Offsets on a Channel Measurement........................... 2-25

2-4 Averaged Readings.................................................................... 2-27

2-5 Pulsed Signal ............................................................................. 2-28

2-6 Limits Checking Application..................................................... 2-30

2-7 Limits Checking Results ........................................................... 2-31

2-8 Pass/Fail Limit Indicators......................................................... 2-32

2-9 Digital Display...........................................................................2-33

2-10 Analog Display........................................................................... 2-33

2-11 Digital and Analog Display....................................................... 2-33

2-12 Test Setup for Recording Swept Measurements...................... 2-39

2-13 “Save/Recall” Screen..................................................................2-42

2-14 How Measurements are Calculated.......................................... 2-43

2-15 Replacing the Fuse .................................................................... 2-52

4-1 Error Annunciator Position....................................................... 4-2

Page

HP EPM-441A User’s Guide Contents-5

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Contents-6 HP EPM-441A User’s Guide

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List of Tables

2-1 Connecting the HP 8480 Series Power Sensors

During Calibration .................................................................... 2-7

2-2 Measurement Units................................................................... 2-20

3-1 .................................................................................................... 3-10

5-1 Zero Set Specifications .............................................................. 5-4

5-2 Noise Multiplier.........................................................................5-7

5-3 Power Sensor Specifications...................................................... 5-8

5-4 Settling Time ............................................................................. 5-9

5-5 Settling Time ............................................................................. 5-10

Page

HP EPM-441A User’s Guide Contents-7

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Contents-8 HP EPM-441A User’s Guide

HP4402.book : chapter1.fm 1 Tue Apr 22 15:20:23 1997

1

Getting Started

HP4402.book : chapter1.fm 2 Tue Apr 22 15:20:23 1997

Getting Started

Introduction

Introduction

One of the first things you will want to do with your power meter is to
switch it on and become acquainted with its front panel. The sections in
this chapter prepare the power meter for use and help you get familiar
with some of the front panel operations.

The front panel consists of both hardkeys and softkeys which allow you to
select various functions and operations. When some hardkeys are selected
the corresponding softkey labels are displayed on the power meter display.

If you are using the power meter remotely refer to the
HP EPM-441A/442A Programming Guide for remote operating details.

1-2 HP EPM-441A User’s Guide

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Turning On the Power Meter

The following steps show you how to turn on the power meter and verify
that it is operating correctly.

1. Connect the power cord and turn on the power meter.

The front panel display and the green power LED light up when

the power meter is switched on. The power meter performs it’s

power on self test. If the self test is not successful the error

annunciator turns on. If this occurs contact your Hewlett-Packard

Sales and Service office for instructions on returning the power

meter to Hewlett-Packard for service.

Getting Started

Turning On the Power Meter

Caution This instrument is designed for use in Installation Category II and

Pollution Degree 2 per IEC 1010 and 664 respectively.

Caution This instrument has an autoranging line voltage input, be sure

the supply voltage is within the range of 85 to 264 Vac.

Note If the power meter has been stored at extremely low temperatures

outwith the operating range of the power meter, the display may
take a few minutes to operate.

2. Set the display contrast if required.

The display contrast is adjusted by pressing and . If

these softkeys are not displayed press repeatedly until they

Prev

appear.

3. Connect a power sensor.

Connect one end of the sensor cable to the power meter’s channel

input and the other end to the power sensor.

4. Making a measurement.

A minimum warm up time of 30 minutes is recommended before

accurate measurements can be made.

HP EPM-441A User’s Guide 1-3

Prior to making your first measurement you must zero and

calibrate the sensor and meter combination. Refer to Chapter 2 for

further information if you are not familiar with zeroing,

calibrating or making measurements with a power meter.

HP4402.book : chapter1.fm 4 Tue Apr 22 15:20:23 1997

Getting Started

The Front Panel at a Glance

The Front Panel at a Glance

101112

9

1

2

3

1.

4

Preset
Local

5

6

7

8

This hardkey allows you to preset the power meter if you are
currently working in local mode (that is, front panel operation). In
local mode a confirmation pop up window is displayed prior to a
preset being carried out. However, if you are in remote mode (that
is, HP-IB operation), then pressing this hardkey places the power
meter in local mode provided local lock out (LLO) is not enabled.

2. Hardkeys relating to the display layout.

measurement window on the power meter’s display. The window
which is selected is highlighted by a shadowed box. Any
measurement setup you create is implemented in the selected
window.

window display.

1-4 HP EPM-441A User’s Guide

This hardkey allows you to select the upper or lower

This hardkey allows you to choose either a one or a two

HP4402.book : chapter1.fm 5 Tue Apr 22 15:20:23 1997

3.

This hardkey switches the power meter between on and standby.

When the power meter is switched to standby (that is, when this

hardkey has not been selected but the line power is connected to

the instrument) the red LED is lit. When the power meter is

switched on the green LED is lit.

4. “System/Inputs” hardkey with softkey menu.

System

The hardkey allows access to softkey menus which affect

Inputs

the general power meter system setup, (for example the HP-IB

address) and also to softkey menus which effect the setup of the

channel inputs. Refer to Chapter 3 for further information about

this hardkey and it’s softkey menu.

Save

5.

Recall

Getting Started

The Front Panel at a Glance

This hardkey is the only one that is completely dedicated to the

control of the power meter as a system. The only other hardkey

which affects system parameters is the hardkey. Refer to

System
Inputs

Chapter 3 for further information about this hardkey and it’s

softkey menu.

6. Dedicated “Window” hardkeys with softkey menus.

Meas
Setup

Rel

,,

Offset

dBm/W

These hardkeys allow access to softkey menus which affect the

setup of the measurement windows. Refer to Chapter 3 for further

information about these hardkeys and their softkey menus.

7. Dedicated “Channel” hardkeys with softkey menus.

Frequency
Cal Fac

Zero

,

Cal

These hardkeys allow access to softkey menus which affect the

measurement channel. Refer to Chapter 3 for further information

about these hardkeys and their softkey menus.

8. Channel Input.

The HP EPM-441A has one sensor input. Power meters configured

with options 002 or 003 have the sensor inputs on the rear panel

and the front panel.

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Getting Started

The Front Panel at a Glance

9. POWER REF Output.

The power reference output is a 50 Ω type N connector. The output
signal of 1 mW at 50 MHz is used for calibrating the sensor and
meter combination. Power meters configured with option 003 have
the power reference on the rear panel.

10. Arrow hardkeys.

, , and hardkeys allow you to move the
position of the cursor, select fields for editing, and edit
alphanumeric characters. Refer to Chapter 3 for further
information.

11. Menu related hardkeys.

More

This hardkey allows you to move through all pages of a
menu. The bottom right of the power meter display indicates the
number of pages in the menu. For example, if “1 of 2” is
displayed, pressing moves you to “2 of 2”. Pressing

More More

again moves you back to “1 of 2”.

Prev

This hardkey allows you to move back one level in the

softkey menu. Repeatedly pressing accesses a menu which

Prev

allows you to increase and decrease the display contrast.

12. Softkeys.

These four keys are used to make a selection from the menus.

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The Display Layout

The following figure details the display layout when two measurement
windows are displayed, one analog and one digital. However it is possible
using the key to display just one measurement window.

Getting Started

The Display Layout

14

1

2

3
4

5

1. The status reporting line displays five fields, three associated with
the HP-IB status and two associated with error and warning
conditions. The first field displays either “RMT” (remote, HP-IB
operation) or “LCL” (local, front panel operation). The second field
displays “TLK” if the power meter is addressed to talk or “LSN” if it
is addressed to listen. The third field indicates an “SRQ” (service
request). The fourth field indicates “ERR” for any error conditions.
The last field is used to report error and warning messages.

2. The measurement data is displayed in either one or two
rectangular windows depending on the setting of . Pressing

allows you to toggle between a one or two window display.
When two windows are displayed and this hardkey is pressed the
single window then displayed is the one which was previously
highlighted with the shadowed box. On the two window display
the measurement setup menus work on the window which is
shadowed.

3. This is the measurement result field.

4. This field displays the units of measurement, either dBm, dB,
Watts or %.

910111213

8

7

6

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Getting Started

The Display Layout

5. This window is configured to show an analog meter which displays
the measurement result and the meter scaling.

6. This field displays the number of pages in the current softkey
menu. For example , “1 of 2” indicates that there are two pages of
softkeys and you are on the first page. Pressing moves you
to page “2 of 2”.

7. Any softkeys available are displayed in these four fields.

8. This field displays the title of the menu. For example, when the
power meter is initially switched on the “Contrast” menu is
displayed, and, if you press “Zero/Cal” is displayed.

9. This field indicates if the measurement result is outwith the upper
or lower limits set. If the measurement is within the limits this
field is empty. If the measurement result is less than the minimum
limit set, “Undr Lmt” is displayed. If the measurement result is
more than the maximum limit set, “Over Lmt” is displayed. Refer
to “Setting Measurement Limits”, on page 2-30 for further
information.

10. This field displays “Rel” if relative mode is on. Refer to “Making
Relative Measurements”, on page 2-22 for further information.

11. This field displays “Ofs” if an offset is set. Refer to “Setting
Offsets”, on page 2-24 for further information.

12. This field displays “Rng Hld” if a range is selected. Refer to
“Setting the Range”, on page 2-36 for further information.

13. This field displays “Dty Cyc” if a duty cycle is set. This allows you
to measure the power of a pulsed signal. Refer to “Measuring
Pulsed Signals”, on page 2-28 for further information.

14. This field displays the currently selected frequency or calibration
factor.

More

Zero
Cal

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