Viavi OSA-4100 User manual

OSA-4100 / OCV-4100
User manual
BN 2332/91.11
2021.04
English

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-certification
Copyrights
This product or parts of this product are based on recommendations and/or
standards from the standardization section of the International Telecommuni-
cation Union – ITU-T and/or the European Telecommunications Standards
Institute – ETSI.
These recommendations and standards are subject to the proprietary rights of
these organizations.
It is not permitted to copy ITU-T recommendations or ETSI standards fully
or in part and/or to pass them on to third parties without prior written
permission from ITU-T and/or ETSI.
Copyright
©Copyright 2021 Viavi Solutions Inc. All rights reserved.
Viavi and the Viavi logo are trademarks of Viavi Solutions Inc.
All other trademarks and registered trademarks are the property of their
respective owners.
Viavi Solutions Deutschland GmbH
Arbachtalstraße 5, D-72800 Eningen u. A.
Order number: BN 2332/91.11
Issue: 2021.04
Previous issue: -.-
Notes
Changes may be made to specifications, designations and delivery information.

Contents
1 Introduction 5
Nano-OSA module ............................ 5
Symbols used in this user manual .................... 7
2 Safety Information 8
Intended and proper use ......................... 8
General laser safety ............................ 9
Specific laser safety ............................ 10
General warning symbol ......................... 11
Ventilation ................................ 12
Maintenance ............................... 12
3 Getting started 13
Starting the OSA application ...................... 13
4 Configuration 14
Auto-set mode .............................. 14
Manual configuration ........................... 15
Measurement parameters ........................ 16
Splitter Compensation .......................... 20
Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
OSNR ................................... 22
Display .................................. 23
Alarms ................................... 24
Link Discription ............................. 26
File Configuration ............................ 27
SFP Settings ............................... 28
5 Measurement 29
6 Result display 31
Overview ................................. 31
Using the cursor ............................. 33
The zoom function ............................ 34
The shift function ............................ 35
The measurement function ....................... 35
Multiple traces (Overlay) ........................ 37
3

Adjusting the y axis .......................... 38
Displaying the difference of two curves ................ 39
7 Table display 40
Overview ................................. 40
Table contents .............................. 41
Table statistics .............................. 42
Result colors ............................... 42
8 Drift measurement 44
9 Reports 47
Fast report ................................ 47
PDF File system report ......................... 48
10 File Management 49
Storing OSA measurements ....................... 49
Recalling OSA files ............................ 49
11 Maintenance 50
Cleaning the instrument ......................... 50
Optical surfaces .............................. 51
12 Specifications 52
13 Ordering Information 54
14 Product Regulatory Compliance 55
Viavi Environmental Management Program ................ 55
EU WEEE and Battery Directives ................... 56
EU REACH ................................ 57
California Proposition 65 ........................ 57
RoHS ................................... 58

Introduction
1INTRODUCTION
This user manual is an addition to the MTS / 5800 Base
Unit user manual. For all questions not covered in this
user manual – particularly concerning safety – please
refer to the Base Unit user manual.
Nano-OSA module
Figure 1.1: Nano-OSA module
The Nano-OSA is Viavi’s new generation of DWDM
analyzer modules. It scans the full C-band wavelength
range between 1260 and 1650 nm for commissioning,
upgrade, and trouble shooting of DWDM networks. The
Nano-OSA offers the functionality and speed of an optical
spectrum analyzer in a handheld form at a fraction of the
price of an conventional OSA. The measurement result
is displayed in a graphical (trace) and numerical (table)
format providing detailed information of the power level
and the wavelength of DWDM channels.
Nano-OSA user manual 5/59

Introduction
SFP Slots
The Nano-OSA offers 1 integrated SFP slot for mounting
one SFP transceiver module or tunable laser (to be
ordered separately). These SFP+ modules can be used
as a DWDM stimulus to check DWDM networks together
with the DWDM analyzer.
An activated transceiver module connected to the SFP+
slot emits optical radiation at the output “TX”. The
input “RX” of the transceiver module has no function.
The optical laser radiation is indicated by LEDs assigned
to the SFP slots. The SFP modules are hot pluggable
and can be changed during operation of the Nano-OSA.
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Introduction
Symbols used in this user manual
The following character formats are used in this user
manual:
X
Requirement
This requirement must be met first; e.g.
XThe device is switched on.
◮
1.
2.
Instruction
Follow the instructions given (the numbers indicate
the order in which the instructions should be fol-
lowed); 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.
[ MODE] Device keys
Device keys are indicated within square brackets.
Nano-OSA user manual 7/59

Laser safety
2SAFETY INFORMATION
Intended and proper use
The Nano-OSA devices are meant for professional use
only.
User must meet the the user requirements to operate the
device.(see next section)
Intended use also includes reading and following all user
information available for the devices. In particular, the
safety instructions in this book and in the user manual
of the device.
This instrument is intended for measurements on optical
fiber devices and systems.
◮The instrument is intended for indoor usage only.
◮
Please make sure the instrument is not operated
outside the permitted ambient conditions.
◮Observe the specified measurement range.
◮ Always make sure that the instrument is in proper
working order before switching it on.
◮ The module shall only be operated in VIAVI ap-
proved mainframes.
User requirements
OSA devices must be operated by skilled and trained
people only.
Skilled and trained people are those, who successfully
completed an appropriate training for handling laser
products or have been instructed in detail in handling
these products.
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Laser safety
General laser safety
Laser radiation can cause irreparable damage to
the eyes and skin.
The Nano-OSA SFP-Bay laser sources are Class 1 laser
products according to DIN EN IEC 60825-1:2014 or 60825-
1:2007. Class 1 lasers are safe under reasonably foreseeable
operating conditions, including the use of optical aids.
◮
Nevertheless, heed the normal precautions for working
with laser radiation and consider local regulations.
The laser class to be observed depends on the laser source
connected to the OSA module. This can reach up to laser
Class 4 for the high power versions. The beam as well as
reflections of a Class 4 laser can be dangerous for eyes and
skin, even without an optical instrument (magnifying glass,
microscope, binoculars) in front of the eye).
◮Always be aware of the hazard level of the device
to be connected!
To find out the appropriate laser
classification, associated wavelengths and optical power
levels, see the specifications in the operating manual of
the connected laser and follow the instructions given
there.
◮
Connect all optical fibers before switching on the radia-
tion source.
◮ Switch off the laser source before disconnecting the opti-
cal fibers.
◮ Never look directly into the output of a laser source or
into an optical fiber connected to it.
◮Do note expose skin to the beam.
◮Always cover unused ports.
◮
Heed the normal precautions for working with laser
radiation and consider local regulations.
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Laser safety
Specific laser safety
Laser classification of the SFP module
SFP laser classification
Laser radiation can cause irreparable damage to
eyes and skin.
Always be aware of the laser classification of the device to be
connected! To find out the appropriate laser classification,
associated wavelengths and optical power levels, see: – the
label on the SFP module – the “Specifications” chapter in
the user manual of the SFP
◮Use only class 1 laser products in the SFP slots.
◮ However, the user is free to use any other SFP
transceiver compatible with the SFP Multi Source
Agreement (MSA).
◮ In this case you must observe the laser classifica-
tion of the inserted SFP transceiver and its safety
instructions!
Safety instructions for class 1
laser products
Invisible laser radiation
Class 1 laser products are defined as safe in normal
operation mode
◮
Although the laser radiation from a class 1 laser prod-
uct will not harm eyes or skin, follow the general
laser safety instructions (see General laser safety in-
structions) to ensure maximum safety when working
with laser sources.
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Laser safety
Safety instructions for class 1M laser
products
Visible & Invisible laser radiation
Viewing the laser output of a class 1M laser prod-
uct with cer- tain optical instruments (for ex ample
eye loupes, magnifiers, microscopes) within a dis-
tance of 100 mm may pose an eye hazard.
◮
Do not expose eyes to the beam within a distance
of 100 mm.
◮ Do not view the laser output with optical instru-
ments.
◮Follow the general laser safety instructions.
General warning symbol
A warning symbol on the device indicates a potential
hazard. In all cases where a warning symbol is shown
on the display or labeled on the device, the operating
manual must be consulted to learn more about the nature
of the potential hazard and any actions that have to be
taken.
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Laser safety
Environmental conditions
The Nano-OSA device must not be operated outside
the specified environmental conditions. The specified
environmental conditions can be found in the technical
specifications of the user guide delivered with your device.
Ventilation
Insufficient ventilation can damage the device
or adversely affect its function and safety.
◮
Ensure adequate ventilation when operating the in-
strument.
Maintenance
Invisible laser radiation
Maintenance or cleaning of the instrument while
it is connected or operating may damage the in-
strument or injure you.
◮
Make sure that the instrument is switched off and dis-
connected from all power sources and optical radiation
sources before maintenance or cleaning.
◮
Do not open the instrument for maintenance or service.
Service shall be performed by Viavi trained personnel
only.
Water and cleaning fluids
The instrument may be damaged or destroyed
if water or cleaning fluids penetrate it.
◮
Make sure that water or cleaning fluids do not get
inside the instrument.
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start
3GETTING STARTED
Starting the OSA application
The fiber to be tested is connected to the optical connec-
tor.
1. Select the Home button.
2.
To start the OSA application, click on the OSA
Icon.
Figure 3.1: Home screen with Nano-OSA Application
Nano-OSA user manual 13/59

Configuration
4CONFIGURATION
After connecting the fiber to be tested to the optical
connector, you must select the Nano-OSA module (see
the Base Unit user manual).
To configure the Base Unit in preparation for an OSA test
on a fiber, press the
SETUP button. Two configuration
procedures are available:
•“Auto-set mode”
In this case the parameters are selected automatically.
•“Manual configuration”
In this case you may define your own configuration.
Auto-set mode
◮Press the Auto-set softkey.
Following configuration will automatically be set.
Parameter Setting
Acquisition settings
Sweep Single
Measurements setting
Channel detection All
Signal threshold Auto
Splitter compensation No
Results screen settings
Grid conventional
Channel Width Auto
Alarms No
Unit of x-axis last setting used (THz or nm)
In case of any parameter setting the Test Auto WDM
softkey appears.
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Configuration
Figure 4.1: Auto-set softkey (1)
Manual configuration
Instead of selecting the Auto-set mode, the configuration
parameters can be set manually.
The parameter to be modified must be selected by means
of the direction keys
➤
,
➤
,
➤
and ➤.
The possible options then appear on the screen: make
your choice and confirm by using the Enter key .
Alternatively, change the parameters via the touchscreen.
The various parameters proposed are defined below.
Nano-OSA user manual 15/59

Configuration
Measurement parameters
Sweep
Single There will be one single measurement and the display of its results.
Continue There will be a measurement with refreshment of the trace and
real time display of results.
Statistics In this mode, the number of samples concerned by statistics must
be entered (next parameter).
Drift For measuring power and wavelength over time. The number of
sweeps and the latency between the sweeps need to be set.
Note: For Drift measurements a Grid needs to be defined and
the Channel Detection parameter is set to Grid.
Number of sweeps
• In Statistics mode: between 2 and 1000
• In Drift mode: between 2 and 10000
Statistics mode
Wait Period
The Wait Period parameter allows to enter a wait period
prior to the measurement start.
Up to .. Increments of ...
1 minute 5 seconds
10 minute 1 minute
60 minute 5 minutes
24 hours 1 hour
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Configuration
Drift mode
Monitoring Time
The Monitoring Time parameter sets the time frame for
completing all measurements
Intervall
The Interval sets the timedelay between measurements
Nano-OSA user manual 17/59

Configuration
OO-OSNR method
The OO-OSNR
∗
mode is used to measure the channel
OSNR in a two step process. When selecting the OO-
OSNR in the Setup Measurement menu, a new button
on the second result-screen is presented.
Table 4.1: OO-OSNR measurement softkey
the first measurement is used as reference scan with the
channel signal being switched on.
• Select the Ref.Acq checkbox
• hit start to begin acquisition
the second scan will measure the noise-floor within this
channel, while the signal has to be switched off by the
user.
• switch off the signal of the desired channels
• select Noise Acq checkbox
• hit start to begin acquisition
∗On-Off OSNR methode
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Configuration
Signal Threshold
Threshold for detection of channels.
Auto • The threshold is determined automatically.
Manual • Editable from -54.9 to +10 dBm
• To modify values: use direction keys or Edit Number
Note: Modification of the parameters Channel settings and
Signal threshold will only modify the results if the
Nano-OSA module in use is the one that was used for
the acquisition
Channel detection
Grid The grid serves as a detection reference: it must therefore be :
• ITU DWDM
• ITU CWDM
• Regular
• Manual
The choice of grid takes priority over the choice Channel detection .
For example, it is not possible to choose Channel detection = Grid,
if the option selected for the grid is «None» or «Conventional».
All Automatic detection of the channel on each acquisition. In this
mode the channels are always detected without making a reference
measurement.
Note: At the end of an acquisition in All mode, it is possible to create a
grid on the basis of the channels detected. To do this, press the
softkey Adopt Grid in the menu header of Measurement.
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Configuration
Channel Width
Parameter for preset the spectral width of channels. Used
to determine whether channels are seperated from each
other or should be interpreted as a combined channel
Auto Channels spectral width is smaller than 50 Ghz = 0.4 nm
Manual editable from 12.5 to 2500 GHz
Splitter Compensation
When the measurement is accessed by a splitter, it is
possible to compensate for the loss introduced by this
element and to display the value measured before or after
it. Go to the Splitter compensation line to display a
sub-menu proposing the following options:
Value Amount of compensation
Unit dB or %
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