Agilent Technologies 8494A Service-Handbuch

Agilent Technologies

Agilent 8494/95/96A/B

Attenuators

Operating and Service

Manual

2 Agilent 8494/95/96A/B Attenuators Operating and Service Manual

Notices

No part of this manual may be reproduced in

any form or by any means (including elec-

tronic storage and retrieval or translation

into a foreign language) without prior agree-

ment and written consent from Agilent

Technologies, Inc. as governed by United

States and international copyright laws.

Manual Part Number

08494-90008

Edition

Third Edition, January 2011

Printed in Malaysia

Agilent Technologies, Inc.

Phase 3 Bayan Lepas Free Industrial Zone

Bayan Lepas, Penang 11900 Malaysia

Warranty

The material contained in this docu-

ment is provided “as is,” and is sub-

ject to being changed, without notice,

in future editions. Further, to the max-

imum extent permitted by applicable

law, Agilent disclaims all warranties,

either express or implied, with regard

to this manual and any information

contained herein, including but not

limited to the implied warranties of

merchantability and fitness for a par-

ticular purpose. Agilent shall not be

liable for errors or for incidental or

consequential damages in connec-

tion with the furnishing, use, or per-

formance of this document or of any

information contained herein. Should

Agilent and the user have a separate

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document that conflict with these

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arate agreement shall control.

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Safety Notices

CAUTION

A CAUTION notice denotes a haz-

ard. It calls attention to an operat-

ing procedure, practice, or the likes

of that, if not correctly performed

or adhered to, could result in dam-

age to the product or loss of impor-

tant data. Do not proceed beyond a

CAUTION notice until the indicated

conditions are fully understood and

met.

WARNING

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the likes of that, if not correctly

performed or adhered to, could

result in personal injury or death.

Do not proceed beyond a WARN-

ING notice until the indicated

conditions are fully understood

and met.

Agilent 8494/95/96A/B Attenuators Operating and Service Manual 3

Certification

Agilent Technologies certifies that this product met its published

specifications at the time of shipment from the factory. Agilent

Technologies further certifies that its calibration measurements are

traceable to the United States National Institute of Standards and

Technology (NIST, formerly NBS), to the extend allowed by the

Institute’s calibration facility, and to the calibration facilities of the

other International Standards Organization members.

WEEE Compliance

This product complies with the WEEE Directive (2002/96/EC)

marking requirements. The affixed label indicates that you must

not discard this electrical/electronic product in domestic household

waste.

Product Category: With reference to the equipment types in the

WEEE Directive Annex I, this product is classed as a "Monitoring

and Control Instrumentation" product.

Do not dispose in domestic household waste.

To return unwanted products, contact your local Agilent office, or

see www.agilent.com for more information.

4 Agilent 8494/95/96A/B Attenuators Operating and Service Manual

Regulatory Markings

The CE mark is a registered trademark of the European Community. If it is

accompanied by a year, it indicates the year the design was proven.

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

This text indicates that this ISM device complies with Canadian ICES-001.

Cet appareill ISM est conforme a la norme NMB-001 du Canada.

This text indicates that the instrument is an Industrial Scientific and Medical

Group 1 Class A product (CISPER 11, Clause 4).

This symbol indicates the time period during which no hazardous or toxic

substance elements are expected to leak or deteriorate during normal use. Forty

years is the expected useful life of the product.

Agilent 8494/95/96A/B Attenuators Operating and Service Manual 5

Contacting Agilent

For more information, please contact your nearest Agilent office.

Or, go to www.agilent.com/find/assist for more information.

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6 Agilent 8494/95/96A/B Attenuators Operating and Service Manual

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Agilent 8494/95/96A/B Attenuators Operating and Service Manual 7

Contents

1 Introduction 9

Product Overview 10

Instrument Options 11

Specifications 12

Frequency Range and Attenuation 12

Attenuation Accuracy 12

Maximum SWR 13

Maximum Residual Attenuation 13

Attenuation Repeatability 13

RF Power Handling Capability 14

Operating Life 14

2 Environmental Specifications & Physical Dimensions 15

Environmental Specifications 16

Physical Dimensions 17

3OperatingGuides19

Installation 20

Initial Inspection 20

Mating Connectors 21

Installation Instructions 21

Operating Instructions 22

Operator’s Check 23

Performance Tests 25

Service Instructions 25

8 Agilent 8494/95/96A/B Attenuators Operating and Service Manual

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Agilent 8494/95/96A/B Attenuators

Operating and Service Manual

Agilent Technologies

Introduction

Product Overview 10

Instrument Options 11

Specifications 12

Frequency Range and Attenuation 12

Attenuation Accuracy 12

Maximum SWR 13

Maximum Residual Attenuation 13

Attenuation Repeatability 13

RF Power Handling Capability 14

Operating Life 14

This manual contains operating instructions for the Agilent

8494/95/96A/B Attenuators. Included in the manual is

information required to install and test these attenuators.

10 Agilent 8494/95/96A/B Attenuators Operating and Service Manual

1 Introduction

Product Overview

Agilent 8494A/B, 8495A/B, and 8496A/B are 50- ohm coaxial

step attenuators.

For the 8494A/B, the attenuation can be varied in 1 dB steps, or

10 dB steps for the 8495A/B and 8496A/B. The attenuation shown

on the control knob is the additional attenuation added in the

signal path over the insertion loss of the attenuator in the 0 dB

position.

•Agilent 8494A/B instruments are four- section attenuators with a

range of 0 dB to 11 dB in 1 dB steps.

•The 8495A/B is a three- section attenuator with a range of 0 dB

to 70 dB in 10 dB steps.

•The 8496A/B is a four- section attenuator with a range of 0 dB

to 110 dB in 10 dB steps.

The attenuator sections are connected in cascade. Each section

consists of a precision, thin- film attenuator card, a lossless

thru- line and a ganged pair of edge line transmission lines. The

edge lines are flexed to make contact with either the attenuator

card or the thru- line. The edge line contacts are gold- plated leaf

springs which ensure long life and high repeatability. Low- torque

cams flex the edge lines. Table 8, “Attenuator Switching Order,” on

page 22 shows the switching arrangements.

CAUTION

Do not exceed the RF power rating of 1 W average or 100 W peak with a

maximum pulse width of 10 µs. Do not connect an attenuator RF input or

output connector to greater than ±7 Vdc. If the attenuator must be connected

to a device with a potential greater than ±7 Vdc, use a blocking capacitor.

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