Viavi OLA-54 User manual

OLA-54, OLA-55, OLA-55M

Optical Light Attenuators

Operating Manual

Bedienungsanleitung

BN 2280/98.11

2016.01

OLA-54_55_55M_en_Innentitel.fm Seite 1 Donnerstag, 21. Januar 2016 5:06 17

OLA-54_55_55M_en.book Seite 3 Donnerstag, 21. Januar 2016 4:31 16

OLA-54, OLA-55, OLA-55M

Optical Attenuators

BN 2280/01

BN 2280/21

BN 2280/02

BN 2280/22

BN 2280/31

BN 2280/41

launaMgnitarepO

Please direct all enquiries to your local Viavi

sales company.

The addresses can be found at:

www.viavisolutions.com/en-us/contact-

sales-expert

The description of additional features of the

device can be found at:

www.viavisolutions.com/en-us/products/

network-test-and-certication

Copyrights

This product or parts of this product are based on the

Recommendations and/or Standards issued by the

Standardization Sector of the International

Telecommunications Union-ITU-T and/or the European

Telecommunications Standards Institute-ETSI. These

Recommendations and Standards are copyright to these

organizations. ITU-T Recommendations or ETSI Standards

may not be copied and/or made available to third parties in

whole or in part without the written agreement of ITU-T

and/or ETSI.

Viavi and the Viavi logo are registered trademarks of Viavi

Solutions Inc.

All other trademarks and registered trademarks are the

properties of their respective owners.

Viavi Solutions Deutschland GmbH

Arbachtalstraße 5, 72800 Eningen u. A.

Note: Changes may be made to specications,

descriptions and delivery information.

Printed in Germany

Order no.: BN 2280/98.11

Version: 2016.01

Previous version: 2014.01

OLA-54_55_55M_en.book Seite 4 Donnerstag, 21. Januar 2016 4:31 16

Viavi OLA-54/-55/-55M i

CONTENTS

1 Introduction 1

OLA-54/-55/-55M

Optical Attenuators........................ 1

Operating manual update................... 3

Symbols used in this operating manual ........ 4

2 Safety Information 6

Warning symbols on the unit ................ 6

Proper usage ............................ 6

Laser safety ............................. 7

Battery operation ......................... 8

Ventilation .............................. 9

SNT-121A AC Adapter/Charger.............. 9

3 Getting Started 11

Power supply ........................... 15

Connecting optical cables ................. 19

4 Basic Operation 23

Switching the device on/off ................ 23

Switching the backlight on/off............... 24

Display elements ........................ 24

Navigating in the menus................... 25

Configuring the device .................... 25

5 OLA-54/-55 Operation 31

The MAIN menu ......................... 31

Selecting a wavelength ................... 32

Setting the attenuation .................... 32

Selecting absolute or relative attenuation mode 33

Setting a reference level .................. 34

OLA-54_55_55M_en.book Seite i Donnerstag, 21. Januar 2016 4:31 16

ii OLA-54/-55/-55M Viavi

CONTENTS

6 The OLA-55M as Attenuator 35

The ATT MAIN menu ..................... 35

Selecting the operating mode............... 36

Setting the attenuation .................... 37

Selecting absolute or relative mode .......... 40

Setting a reference level................... 40

7 The OLA-55M as Level Controller 41

The ALC MAIN menu ..................... 41

Selecting the operating mode............... 42

Setting the output level.................... 44

8 Maintenance 47

Cleaning the test port ..................... 47

Cleaning the instrument ................... 48

9 Remote Control 49

Communication interface .................. 49

Key................................... 49

Commands ............................. 50

10 Specifications 58

Technical data .......................... 58

General specifications .................... 59

SNT-121A Adapter/Charger ................ 60

11 Ordering Information 61

Accessories ............................ 61

Index 63

OLA-54_55_55M_en.book Seite ii Donnerstag, 21. Januar 2016 4:31 16

Viavi OLA-54/-55/-55M 1

1INTRODUCTION

OLA-54/-55/-55M

Optical Attenuators

About the attenuators

The OLA-54/-55/-55M Optical Attenuators provide

continuously variable attenuation of optical signals. The

OLA-55M additionally provides a power control function.

Since the attenuators were designed primarily for in-

service testing of laser systems, these devices are

suitable for applications involving communications

equipment for the digital hierarchies (PDH, SDH) as well

as for systems using analog modulation (CATV).

Battery operation from four AA batteries and the robust,

shock-proof design provide long operating time in the

field even under tough conditions. AC line operation via

a separate AC adapter and the USB interface for remote

control also ensure ease of use in the laboratory or

production environment.

Differences between the models

OLA-54 OLA-55 OLA-55M

Function Attenuator Attenuator Attenuator

Power

controller

Attenuation

setting

Manual Manual Motor

powered

Mode Multimode Single

mode

Single

mode

OLA-54_55_55M_en.book Seite 1 Donnerstag, 21. Januar 2016 4:31 16

2 OLA-54/-55/-55M Viavi

1INTRODUCTION

Functional characteristics

The optical signal is attenuated using a neutral density

filter which is shifted into the path of radiation between

the input and output fiber connections (attenuator

module).

By adjusting the position of the filter using the rotary

control on the front panel of the devices OLA-54 and

OLA-55, the attenuation can be varied manually in the

range from 2 to 60 dB (attenuation is not dependent on

any electrical function).

The filter position is adjusted in the OLA-55M using a

motor. The OLA-55M can be used as a power controller

to ensure a constant output power level when the

attenuator is used in combination with the internal power

meter.

Please note that the insertion loss displayed by the

devices already includes the connector loss according to

Method 6, IEC 60874-1. The effective attenuation is

displayed with a resolution of 0.01 dB (OLA-54/-55:

0.05 dB) on the LC display. Favorable, low-reflection

operating conditions are ensured by the connectors as

well as by the anti-reflection coating applied to the

components in the attenuator module.

Wavelengths and test adapters

Excellent linearity is achieved across the entire

attenuation range through individual calibration of each

device based on the attenuation filter characteristics.

Range 750 –

1350 nm

1260 –

1650 nm

1260 –

1650 nm

Fiber type 50/125 9/125 9/125

Connector

type

PC PC or APC PC or APC

OLA-54 OLA-55 OLA-55M

OLA-54_55_55M_en.book Seite 2 Donnerstag, 21. Januar 2016 4:31 16

Viavi OLA-54/-55/-55M 3

1INTRODUCTION

The OLA-55 and OLA-55M are calibrated in the factory

at wavelengths of 1310, 1550, and 1625 nm, and the

OLS-55 at 850 and 1200 nm.

The attenuators are looped into the test configuration

using test adapters which are available for all common

connector systems (e.g. DIN, FC, ST).

Operating manual update

Continuing enhancement and further development of the

SmartClass family may mean that this operating manual

does not cover all the latest functions of your device.

If the operating instructions about features provided by

your device are missing, please visit the Viavi web site to

check if additional information is available.

To download the latest operating instructions:

1. Visit the Viavi web site at www.viavisolutions.com/en-

us/products/network-test-and-certification.

2. Select your model from the product line.

3. Open the download area and download the operating

instructions if available.

OLA-54_55_55M_en.book Seite 3 Donnerstag, 21. Januar 2016 4:31 16

4 OLA-54/-55/-55M Viavi

1INTRODUCTION

Symbols used in this operating

manual

The following symbols, warnings and character formats

are used in this operating manual:

CAUTION