Viavi OLA-54 User manual

OLA-54, OLA-55, OLA-55M
Optical Light Attenuators
Operating Manual
Bedienungsanleitung
BN 2280/98.11
2016.01
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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.
© Copyright 2016 Viavi Solutions Inc. All rights reserverd.
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
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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
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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
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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
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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
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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.
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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
Follow the instructions carefully to
avoid damage to the device.
WARNING
Follow the instructions carefully to
avoid damage to the device or injury
to the person.
DANGER
Follow the instructions carefully to
avoid damage to the device or severe
injury to the person.
High Voltage
Follow the instructions carefully to
avoid damage to the device or severe
injury to the person.
This safety instruction is given if the
danger is due to high voltage.
Laser
Follow the instructions carefully to
avoid damage to the device or severe
injury to the person.
This safety instruction is given if the
danger is due to laser radiation.
Information specifying the laser class
is also given.
!Very important instruction
Follow this instruction carefully; e.g.
!Make sure you protect yourself and
others from exposure to laser light.
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Requirement
This requirement must be met first;
e.g.
The system is switched on

1.
2.
Instruction
Follow the instructions given (the
numbers indicate the order in which
the instructions should be followed);
e.g.
Select mode.
Italics Result
Indicates the result of following an
instruction; e.g.
The page opens.
Bold type
face Pages, controls, and display
elements
Screen pages, controls, and display
elements are indicated in bold type.
Text in blue Cross references
Cross references are indicated in blue
type. When using the PDF version,
just click on the blue text to skip to the
cross reference.
[Store] Instrument keys
Instrument keys are indicated within
square brackets.
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6 OLA-54/-55/-55M Viavi
2SAFETY INFORMATION
2SAFETY
INFORMATION
Warning symbols on the unit
Proper usage
This instrument is intended for measurements on optical
fiber devices and systems.
Please make sure the device is not operated outside
the permitted ambient conditions.
Observe the specified measurement range.
Always make sure that the device is in proper working
order before switching it on.
Warning symbols indicating a
potential hazard
!In all cases where the unit is labeled with
a warning symbol, the operating manual
must be consulted to learn more about
the nature of the potential hazard and
any action that must be taken.
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2SAFETY INFORMATION
Laser safety
WARNING
Dangerous laser radiation
Laser radiation can cause irreparable
damage to the eye and skin.
The maximum permitted power for the OLA-54/-55/-55M
means that the optical input signals can reach Hazard
Level 3B, depending on the device type.
Bear this in mind when using the OLA-54/-55/-55M.
!Always be aware of the hazard level of the device to
be connected.
!Fiber optic systems assigned to a specific laser safety
class or to a specific hazard level must not be
reassigned to a lower laser safety class or a lower
hazard level as a result of the attenuation of the
OLA-54/-55/-55M.
!Connect all optical fibers before switching on the
radiation source.
!Switch off the laser source before disconnecting the
optical fibers.
!The attenuation of the OLA-54/-55 does not depend
on whether the device is switched on or off.
!The attenuation of the OLA-55M is undefined if the
device is switched off.
!Never look directly into the output of a laser source or
into an optical fiber connected to it.
!Always cover unused ports.
!Heed the normal precautions for working with laser
radiation and consider local regulations.
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8 OLA-54/-55/-55M Viavi
2SAFETY INFORMATION
Battery operation
The input signal of the OLA-55M is on the left , and
the port for the controlled output signal is on the
right . The power control function attenuation will be
undefined if the signal direction is the wrong way round.
!Do not confuse the input and output signal ports.
!You must assume that the OLA-55M is set to the
lowest attenuation value if the test ports are open or if
the signal direction is the wrong way round.
WARNING
Explosion danger
Short-circuiting the batteries can result
in overheating, explosion or ignition of
the batteries and their surroundings.
!Never short-circuit the battery contacts by touching
both contacts simultaneously with an electrical
conducting object.
!Only use AA size dry batteries or rechargeable
batteries.
!Make sure the batteries are inserted with the correct
polarity.
WARNING
Explosion danger
Dry batteries must not be recharged. An
incorrect setting will charge dry
batteries which may then explode.
!Set the device to the correct battery type after you
have changed the batteries and switched on the
device.
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Viavi OLA-54/-55/-55M 9
2SAFETY INFORMATION
Ventilation
SNT-121A AC Adapter/Charger
Safety class
The SNT-121A AC Adapter/Charger Unit is protectively
isolated to conform with IEC 60950.
Environmental conditions
CAUTION
Insufficient ventilation
Insufficient ventilation can damage the
device or adversely affect its function
and safety.
!Ensure adequate ventilation when operating the
device.
CAUTION
Ambient temperature too high/low
Temperatures outside the operating
range of 0 to +40 °C can damage the
SNT-121A Adapter/Charger or
adversely affect its function and safety.
!Only operate the SNT-121A Adapter/Charger indoors.
!The SNT-121A Adapter/Charger must only be operated
at ambient temperatures between 0 and +40 °C.
CAUTION
Insufficient ventilation
Insufficient ventilation can damage the
SNT-121A Adapter/Charger or
adversely affect its function and safety.
!Ensure adequate ventilation when operating the
SNT-121A Adapter/Charger.
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10 OLA-54/-55/-55M Viavi
2SAFETY INFORMATION
CAUTION
Condensation
Operation in the presence of
condensation can damage the
SNT-121A Adapter/Charger or
adversely affect its function and safety.
!Do not operate the SNT-121A Adapter/Charger if
condensation has formed.
!If condensation cannot be avoided, such as when the
SNT-121A Adapter/Charger is cold and is moved to a
warm room, wait until the SNT-121A Adapter/Charger
Unit is dry before plugging it into the AC power line.
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Viavi OLA-54/-55/-55M 11
3GETTING STARTED
Unpacking the device
Packing material
We suggest that you keep the original packing material.
It is designed for reuse (unless it is damaged during
shipping). Using the original packing material ensures
that the device is properly protected during shipping.
Checking the package contents
Your device is shipped with the following accessories:
• 2 adapters (BN 2150/00.xx)
• 4 dry batteries AA
• Belt bag MT-1S
• Operating manual
Checking for shipping damage
After you unpack the device, check to see if it has been
damaged during shipping. This is particularly likely if the
packaging is visibly damaged. If there is damage, do not
attempt to operate the device. Doing so can cause
further damage. In case of damage, please contact your
local Viavi Sales Company. Addresses can be found at
www.viavisolutions.com.
Recovery following storage/shipping
Condensation can occur if a device that is stored or
shipped at a low temperature is brought into a warm
room. To prevent damage, wait until no more
condensation is visible on the surface of the device
before powering it up. Do not operate the device until it
has reached its specified temperature range and wait
until it has cooled down if the device was stored at a high
temperature (see „Ambient temperature”, page 60).
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12 OLA-54/-55/-55M Viavi
3GETTING STARTED
Device overview
Fig. 1 Front and side view (figure shows OLA-54/55)
1
8
2
4
5
6
7
3
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3GETTING STARTED
1Test head cover
2Connector panel (see page 14 for details)
3Device label
4Display
5Stand (on rear of the device)
6External power supply connector, USB control
interface
7Battery compartment (on rear of the device)
8Key pad
Press to select a wavelength.
Press to switch the backlight on/off.
PREV Press to go back one menu level
(without making any changes).
MENU
ENTER
Press to:
• open menu and select menu item
• store settings
OLA-54/55 Rotate wheel to adjust attenuation
level.
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3GETTING STARTED
Connector panel
Fig. 2 OLA-54/55/55M connector panel
OLA-55M LEVEL CONTR ON/OFF: switch the
“Level Controller” mode on and off.
dB/dBr: toggle between absolute
mode in dB and relative mode in dBr.
[/]: recall the stored values for
attenuation or output power level.
Press to switch the device on and off.
Press to:
• scroll up/down in the menus
• change values in the menus
1Optical connector (JAE adapter):
– OLA-54/55: connector 1
– OLA-55M: input
2Optical connector (JAE adapter):
– OLA-54/55: connector 2
– OLA-55M: output
dB/dBr
LEVEL CONTR
ON / OFF
1
2
3
4
12
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