Keysight Technologies N77 Series Manuale utente

User’s Guide

Keysight N77xx Series

N7751A 1-Channel Optical Attenuator and Power Meter

N7752A 2-Channel Optical Attenuator and Power Meter

N7761A 1-Channel Optical Attenuator

N7762A 2-Channel Optical Attenuator

N7764A 4-Channel Optical Attenuator

N7766A 2-Channel Multimode Optical Attenuator

N7768A 4-Channel Multimode Optical Attenuator

Notices

©Keysight Technologies, Inc. 2015

No part of this manual may be

reproduced in any form or by any

means (including electronic storage

and retrieval or translation into a

foreign language) without prior

agreement and written consent from

Keysight Technologies, Inc. as

governed by United States and

international copyright laws.

Manual Part Number

N7751-90B01

Edition

Edition 7.0,January 2015

Keysight Technologies,

Deutschland GmbH

Herrenberger Str. 130

71034 Böblingen, Germany

For Assistance and Support

http://www.keysight.com/find/assist

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. Keysight

Technologies specifically disclaims

the implied warranties of

Merchantability and Fitness for a

Particular Purpose.

Warranty

THE MATERIAL CONTAINED IN THIS

DOCUMENT IS PROVIDED “AS IS,”

AND IS SUBJECT TO BEING

CHANGED, WITHOUT NOTICE, IN

FUTURE EDITIONS. FURTHER, TO

THE MAXIMUM EXTENT PERMITTED

BY APPLICABLE LAW, KEYSIGHT

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 PARTICULAR PURPOSE.

KEYSIGHT SHALL NOT BE LIABLE

FOR ERRORS OR FOR INCIDENTAL

OR CONSEQUENTIAL DAMAGES IN

CONNECTION WITH THE

FURNISHING, USE, OR

PERFORMANCE OF THIS DOCUMENT

OR OF ANY INFORMATION

CONTAINED HEREIN. SHOULD

KEYSIGHT AND THE USER HAVE A

SEPARATE WRITTEN AGREEMENT

WITH WARRANTY TERMS COVERING

THE MATERIAL IN THIS DOCUMENT

THAT CONFLICT WITH THESE

TERMS, THE WARRANTY TERMS IN

THE SEPARATE AGREEMENT SHALL

CONTROL.

Technology Licenses

The hardware and/or software

described in this document are

furnished under a license and may be

used or copied only in accordance

with the terms of such license.

Restricted Rights Legend

If software is for use in the

performance of a U.S. Government

prime contract or subcontract,

Software is delivered and licensed as

“Commercial computer software” as

defined in DFAR 252.227-7014 (June

1995), or as a “commercial item” as

defined in FAR 2.101(a) or as

“Restricted computer software” as

defined in FAR 52.227-19 (June 1987)

or any equivalent agency regulation

or contract clause. Use, duplication or

disclosure of Software is subject to

Keysight Technologies’ standard

commercial license terms, and non-

DOD Departments and Agencies of

the U.S. Government will receive no

greater than Restricted Rights as

defined in FAR 52.227-19(c)(1-2)

(June 1987). U.S. Government users

will receive no greater than Limited

Rights as defined in FAR 52.227-14

(June 1987) or DFAR 252.227-7015

(b)(2) (November 1995), as applicable

in any technical data.

Safety Notices

CAUTION

notice denotes a

hazard. It calls attention to an

operating procedure, practice,

or the like that, if not correctly

performed or adhered to, could

result in damage to the product

or loss of important data. Do not

proceed beyond a

CAUTION

notice until the indicated

conditions are fully understood

and met.

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice,

or the like that, if not correctly

performed or adhered to, could

result in personal injury or

death. Do not proceed beyond a

WARNING notice until the

indicated conditions are fully

understood and met.

CAUTION

WARNING

Contents

1 Getting Started

Overview 9

Keysight N775xA Optical Attenuator and Power Meter and N776xA Optical

Attenuator 10

Initial Inspection 12

Safety Considerations 13

Safety Considerations - Overview 13

Safety Symbols 13

General 14

Operating Environment 15

Line Power Requirements 15

Input/Output Signals 16

Line Power Connectors 16

Instrument Markings 17

AC Line Power Supply Requirements 18

AC Line Power Supply Requirements - Overview 18

Line Power Requirements 18

Line Power Cable 18

Changing the Fuse 20

Operating and Storage Environment 20

Operating and Storage Environment - Overview 20

Temperature 20

Humidity 21

Altitude 21

Pollution Protection 21

Instrument Cooling 21

Contents

Keysight N77xx Series

Input and Output Connectors 22

Input and Output Connectors - Overview 22

Front Panels - Optical Attenuators 23

Rear Panel 25

Making Optical Connections 26

Electrical Connectors 28

LAN Interface 29

Selecting a LAN Network 29

Private LAN Considerations 30

Security 30

Performance 30

Reliability 31

IP Address Availability 31

Site LAN Considerations 31

Connecting the LAN Cable 31

GPIB Interface 34

Cables and Adapters 34

Connector 34

GPIB Logic Levels 35

USB Interface 35

Powering Up the Instrument 36

Front Panel Indicators 36

Connecting to the Instrument 37

Connecting to the Instrument - Overview 37

Connecting over USB 37

Finding the IP Address of an instrument 38

Connecting over LAN 40

Claims and Repackaging 43

Return Shipments to Keysight Technologies 43

Contents

Keysight N77xx Series

N77xx Viewer Common User Interface Functions 44

Connecting to an Instrument 44

Viewing Measurements 46

Saving and Recalling Configurations 47

Controlling the Instrument Refresh 48

2 Attenuation

Attenuation 49

Controlling the Optical Attenuator 49

Setting Attenuation 51

Setting the Number of Digits displayed 51

Selecting the Power Units 51

Setting the Attenuation 52

How to Remove Electrical Offsets (Zero) 53

Enabling and Disabling the Output 55

How to Set a Power Level 55

How to Set the Wavelength 56

How to Set the Averaging Time 56

Compensating for Wavelength Dependencies in your test setup 56

Applying an Offset Table 56

3 Specifications and Regulations Compliance

Definition of Terms 59

Literature 71

Technical Specifications - Optical Variable Attenuator and Power Meter 72

Optical Attenuator 72

Optical Power Meter 74

General Characteristics 75

Declarations of Conformity - Optical Multiport Attenuator and Power Meter 76

Regulations Information 77

EMC Canada 77

Acoustic Noise Information Germany 77

Remove all doubt 77

Keysight E-mail Updates 77

Keysight Direct 78

Keysight Open 78

LXI 78

www.keysight.com 78

Contents

Keysight N77xx Series

4 Accessories

Accessories - Overview 79

Instrument and Options - Keysight N7751A, N7752A, N7761A, N7762A,

N7764A, N7766A, N7768A 80

Cables 81

5 Maintenance and Troubleshooting

Maintenance and Troubleshooting - Overview 83

Cleaning Instructions 83

Cleaning Instructions for this Instrument 84

Safety Precautions 84

Why is it important to clean optical devices? 84

What do I need for proper cleaning? 85

Preserving Connectors 90

Cleaning Instrument Housings 90

Which Cleaning Procedure should I use? 91

How to clean connectors 91

How to clean connector adapters 93

How to clean bare fiber adapters 93

How to clean optical glass plates 94

Additional Cleaning Information 94

Other Cleaning Hints 95

Firmware Upgrades 95

Error Messages 96

SYST:ERR? 96

Data Sanitation 96

Memory Inventory 96

Clearing User Data 96

Index

Contents

Keysight N77xx Series

Contents

Keysight N77xx Series

Getting Started

Overview

This chapter helps you start using your N77-Series instrument.

•“Keysight N775xA Optical Attenuator and Power Meter and

N776xA Optical Attenuator” on page 10

•“Initial Inspection” on page 12

•“Safety Considerations - Overview” on page 13

•“AC Line Power Supply Requirements - Overview ” on page 18

•“Operating and Storage Environment - Overview ” on page 20

•“Input and Output Connectors - Overview” on page 22

•“Making Optical Connections” on page 26

•“Electrical Connectors” on page 29

•“LAN Interface” on page 29

•“GPIB Interface” on page 34

•“USB Interface” on page 35

•“Powering Up the Instrument” on page 36

•“Connecting to the Instrument - Overview” on page 37

•“Claims and Repackaging” on page 43

Keysight N77xx

Series User's Guide

Keysight N775xA Optical Attenuator and Power Meter and N776xA

Optical Attenuator

The Keysight N775xA and N776xA are compact multichannel

attenuators and power meters. They are a new class of remote-

controlled fiber optic instruments. All attenuators feature power

control functionality to set the output power level of the attenuator.

The Keysight N7751A and Keysight N7752A are optical attenuators for

single mode fiber with one and two single-mode fiber attenuator

channels respectively and two extra optical power meter channels, for

convenient power measurements and setup calibration. The Keysight

N7761A, Keysight N7762A and Keysight N7764A are single-mode fiber

optical attenuators for single mode fiber, with one, two and four

attenuator channels respectively.

All N775xA and N776xA attenuators address productivity challenges by

increasing throughput and operational efficiency.

1 Getting Started

Keysight N77xx Series

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