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8

DRIFT MEASUREMENT

The Nano-OSA modules provide a Drift measurement

application to perform multiple measurements and dis-
play the recorded results in a graphical format (trace)
over the time.

This can be used to monitor the drift of power and
wavelength of optical systems or components. This is

important to measure the drift of non temperature sta-
bilized transmitter in CWDM networks.

Note:

A Drift measurement can only be done at predefined
wavelengths or frequencies, for this reason a reference

Grid needs to be defined and the Channel Detection
parameter is set to Grid.

The following parameters need to be set for Drift mea-

surements:

Sweep

Set to Drift.

Monitoring time

Set the timeframe for monitoring

Interval

Defines the time between the measurements.

Note:

Wait period specifies the time between start of one mea-

surement and start of the next measurement and includes
the instrument measurement time.

All channels defined by the channel Grid can be mon-

itored simultaneously with the drift application. To
show the monitored measurement parameter use the

Trace/Channel/Drift

softkey on second page in the

result screen. This button has a toggle function with the
following selections:

Freq.

Frequency monitoring

Power

Power monitoring

OSNR

OSNR monitoring

44

Summary of Contents for OCV-4100

Page 1: ...OSA 4100 OCV 4100 User manual BN 2332 91 11 2021 04 English ...

Page 2: ...tute 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 Viav...

Page 3: ... 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...

Page 4: ...7 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 ...

Page 5: ...on 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...

Page 6: ... 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 6 59 Nano OSA user manual ...

Page 7: ...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 ...

Page 8: ...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 ...

Page 9: ...s 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 ...

Page 10: ...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...

Page 11: ...o 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 t...

Page 12: ...tenance 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 per...

Page 13: ...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 ...

Page 14: ...re 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...

Page 15: ...s 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 ...

Page 16: ...ring 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 me...

Page 17: ...guration 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 ...

Page 18: ...R 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 m...

Page 19: ... a detection reference it must therefore be ITU DWDM ITU CWDM Regular Manual Thechoiceofgridtakespriorityoverthechoice 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 measure...

Page 20: ...th 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 20 59 N...

Page 21: ...Hz by increments of 50GHz N A Channel spacing auto manual Number of channels from 1 99 by increments of 1 from 1 256 N A Channels order N A Channel settings Sub menu accessible to display the wave lengths of each channel name the band and name each channel N A Note The maximum real number of channels for ITU grids depends on the value selected for the first channel and the spacing between the chan...

Page 22: ...eft Right both slopes of channel are investigated to find the noise floor Left only left slope of channel is investigated to find the noise floor Right only right slope of channel is investigated to find the noise floor Worst Case the worst of both slopes of channel is used to find the noise floor S N Distance dB or Noise Acq BW 0 1 nm Standard Noise Acquisition Bandwidth 22 59 Nano OSA user manua...

Page 23: ...nted information on the screen Auto Zoom On Display is zooming automatically depending on measurement range Off auto zooming is disabled Unit of x axis nm wavelenght in nanometer THz frequency in terahertz Table Content Standard OSNR Alarms None Active Nano OSA user manual 23 59 ...

Page 24: ...y measurement results that exceed these thresholds are displayed in red in the table and the icon appears at the top right of the screen If all the results are within the thresholds no result is in red the icon becomes a green checkmark To activate the alarm system go to the Alarms line and select Active Figure 4 2 Alarm parameters 24 59 Nano OSA user manual ...

Page 25: ...x channel offset 1 Yes No Min channel power 2 Yes No Max channel power 3 Yes No Min OSNR Yes No channel number From 001 to the max number of channels channel value Display of the wavelength of the channel number selected Delta Offset 4 From 0 to 10nm P Min 5 From 55 dBm to P Max P Max 6 From P Min to 10 dBm 1 Wavelength drift Selection of the alarm on the basis of the value of Delta Offset 2 The val...

Page 26: ...onfiguration Link Discription Define the parameters in the Link Description menu and add a comment Figure 4 3 Link Discription parameters Figure 4 4 Change Fiber Number choices 26 59 Nano OSA user manual ...

Page 27: ...Configuration File Configuration In the File Configuration menu the memory management is set Figure 4 5 File parameters Figure 4 6 Change File Auto store choices Nano OSA user manual 27 59 ...

Page 28: ...the SFP Small Form factor Pluggable laser module Figure 4 7 SFP parameters and information State to turn the SFP on set state to ON laser indicator LED of SFP is lit Channel Frequency if a tunable SFP is used the frequency can be set ITU_T Ch information on the ITU T channel 28 59 Nano OSA user manual ...

Page 29: ...sult will be displayed in graphical and tabular format During a measurement the Nano OSA has a status LED at the connector side of the module indicating activity with RED color The Fiber Optic applica tion has a small green dot on the OSA tab in the left lower corner when the OSA is measuring Figure 5 1 1 indicator LED in the OSA tab 29 ...

Page 30: ... the screen can be customized by grabbing touching the pink thin line between the graph and table section This separation line can be moved to get the desired size of the graph and or table Figure 5 2 pink separtion line between table and graph Figure 5 3 custom layout for table and graph 30 59 Nano OSA user manual ...

Page 31: ...4 Trace results associated with cursors A and B A B Wavelengths and power at cursors A and B position A B Wavelength and power difference between cursors A and B 5 link direction 6 Alarm result see Alarms on page 24 7 Table of results see Table display on page 40 8 Splitter setting 9 Channel number mark in display 10 Channel number 31 ...

Page 32: ... softkeys enable access to following functions and menus Fast report display and table results can be stored as PDF report or trace data Overlay to compare different measurements or verify changes in the spectrum 2 or more traces can be plotted together in the overlay mode Total Power A B with the usage of the cursors a individual intervall can be defined where the optical power is calculated 32 59 ...

Page 33: ...nd total power between two points zooming and shifting the trace according to the cursor positions Figure 6 2 using the cursor on the display 1 lock cursor distance 2 a colored dot indicates the actual used cursor 3 a colored solid line indicates the position of the cursor 4 in order to place the cursor on the desired position use the zoom options Nano OSA user manual 33 59 ...

Page 34: ... If the cursors distance is locked both cursors will be moved in parallel To jump from one channel to the next 1 Select a channel in the table 2 Press the direction keys and to to jump one channel backward or forward The zoom function Both x and y axis can be zoomed When zooming the x axis the area to be zoomed is defined by the selected cursor and its position If only one cursor is selected the cu...

Page 35: ...e trace 1 Select the graph by touchscreen 2 To shift the trace left or right press the direction keys and 3 To shift the trace up or down press the direction keys and The measurement function By setting both cursors two values can be measured Difference Power A B the difference power between the two cursor positions Total Power the total power between the two cursor positions Delta Power slope and ...

Page 36: ...ure the Total Power 1 Set the cursors to the desired positions 2 Press the softkeys Total Power A B The space between the trace and the two cursors is greyed out and the power is displayed 3 Pressing the key Total Power A B a second time removes the result of the total power measure ment Figure 6 3 measuring the total power between cursor positions 36 59 Nano OSA user manual ...

Page 37: ... of a grid The graph window can include a grid to facilitate verifi cation of the position of the channels Several grids are possible see the chapter Grid on page 21 Multiple traces Overlay The Overlay functions allows you to display multiple traces in one view and to compare them Note The Overlay function is not available in Drift mode To add a new trace 1 Navigate to page 2 of the softkeys on the...

Page 38: ...Trace softkey Adjusting the y axis To compare curves the y axis of the curves can be adjusted by the Y Reset Y Shift Y Exact softkey Press the softkex to select one of he following settings Y Reset All traces are on the the same level at the intersection with the active cursor Y Shift Each trace is shifted 5 dB from the other Y Exact The traces displayed are on the same position according to their...

Page 39: ...e Load or Select the two curves 2 Press the Overlay softkey and then 2 Curves Diff The difference curve is displayed as a new trace in the diagramm Figure 6 5 Overlay of two measurments traces 1 traace number of the generated difference curve 2 new difference trace in graph window Nano OSA user manual 39 59 ...

Page 40: ...the Trace Table key Overview Figure 7 1 Example of results display 1 trace number 2 Resolution of aquisition 3 Number of aquisition 4 OSNR method 5 threshold for channel detection 6 Channel information Table contents For further details see following sections Table contents on page 42 and Table statistics on page 42 40 ...

Page 41: ...l are as following Dect Number of detected channel ITU Ch The ITU number of the channel Power dBm the measured power within the channel bandwidth Wavelength the frequency or the wavelength of the selected channel in THz or in nm Grid the frequency or the wavelength of the selected grid in THz or in nm Offset the frequency or the wavelength offset to the channel center in THz or in nm Spacing The spe...

Page 42: ...le Select the Table Content key in Display menu to either see statics for OSNR or Power Wavelength measurements Result colors When Channel Selection is positioned on Grid and the alarm system is activated measurement results that exceed the defined thresholds are displayed in red results within the thresholds are displayed in green Figure 7 2 Example of alarm indicator 42 59 Nano OSA user manual ...

Page 43: ...hresholds 2 Alarm Icon indicator Additionally the icon indicates that at least one result exceeds the threshold and if all results are within the thresholds no result is in red the icon becomes See see Alarm results on page 24 Nano OSA user manual 43 59 ...

Page 44: ... Channel Detection parameter is set to Grid The following parameters need to be set for Drift mea surements Sweep Set to Drift Monitoring time Set the timeframe for monitoring Interval Defines the time between the measurements Note Wait period specifies the time between start of one mea surement and start of the next measurement and includes the instrument measurement time All channels defined by the...

Page 45: ...n brackets depend on selected choice in display menu nm or THz Wavelength Power OSNR Description Channel Channel Channel Number of channel Frequency Frequency Frequency Wavelength or Frequency of the displayed channel F Ref Power dBm OSNR dB value of last measurement F Avg P Avg dBm SNR Avg dB average of all measurements F Min P Min dBm SNR Min dB minimum of all measurements F Max P Max dBm SNR Ma...

Page 46: ...ch measured data point The Start value as well as the actual cursor position including the time information is shown in the gray area above the table Note If the channel power drifts to a power level below the channel detection threshold the measurement will indi cate No Signal in the bar above the table 46 59 Nano OSA user manual ...

Page 47: ... Fast report Fast Report generates a report which is stored in file system Figure 9 1 Example of Fast Report Change the Fast Report parameters to your needs and then press the save button icon in the title bar 47 ...

Page 48: ...le system report To view the reports on the file system select the File button Select the corresponding PDF File to which your report was stored Figure 9 2 PDF Report loaded from file system 48 59 Nano OSA user manual ...

Page 49: ... create your own folder 3 Click on Store The trace is saved with the extension OSA Recalling OSA files Once an OSA file has been stored recall it using the Explorer 1 Click on File Icon 2 Using directions keys select the directory and then the file to open 3 Click on Load 4 Click on View Trace s or Load Trace Config The selected file is opened For further informations on file management please see th...

Page 50: ...disconnected from all optical radiation sources be fore maintenance or cleaning Cleaning the instrument If the instrument gets dirty through use you can clean it using a soft cloth moistened with a mild solution of detergent NOTICE Water and cleaning fluids The device may be damaged or destroyed if water or cleaning fluids get inside the housing Make sure that water or cleaning fluids do not get in...

Page 51: ...cleaned before it is connected to the instrument The optical connectors on the instrument should also be cleaned regularly To clean the optical connectors 1 Remove the test adapters 2 Dab the end surfaces of the plug pins with cleaning tape and blow out the test adapter using com pressed air Note Always fit protective caps to optical connectors that are not in use Nano OSA user manual 51 59 ...

Page 52: ... 18 75GHz Wavelength reference internal Readout resolution 0 01 nm Resolution bandwidth FWHM 0 12 nm 15 GHz Channel spacing 37 5 200 GHz CWDM Number of channels max 256 Power Measurement Ranges Dynamic range 55 to 23 dBm per channel Noise floor RMS 60 dBm Absolute accuracy 0 8 dB Readout resolution 0 01 dB Scanning time full band 5s full band Optical Port Input Port SM APC and SM PC Switchable opti...

Page 53: ... 128 x 134 x 40 mm 5 04 x 5 28 x 1 57 in Environment Operation 5 to 40 C 41 to 104 F Relative Humidity up to 31 C 15 to 85 Absolute Humidity 31 C 1 to 29 g m3 Storage 20 to 60 C 4 to 140 F Altitude 2000 m max 6500 ft max Pollution Degree 2 Supply Voltage Power Consumption Supply Voltage 12 V DC Power Consumption 6 W max Nano OSA user manual 53 59 ...

Page 54: ...r When ordered with mainframe OCV Drift SW Option for OCV 4100 41DRIFT OCV OSNR SW Option for OCV 4100 41OSNR SFP SW Option 41SFP When ordered as an upgrade without mainframe OCV Drift SW Option for OCV 4100 41DRIFT UPG OCV OSNR SW Option for OCV 4100 41OSNR UPG SFP SW Option 41SFP UPG Accessories Adapters Part Number Switchable ST adapter 2155 00 32 Switchable FC adapter 2155 00 05 Switchable SC ...

Page 55: ...ronmental restrictions and requirements are taken into account during planning and manufacture of Viavi products This attention ranges from the raw materials and finished components selected for use and the manufacturing processes employed through to the use of energy in the factory and right on up to the final stages in the life of a product including dismantling Hazardous materials Viavi avoids ...

Page 56: ...apped If facilities in your country exist for collecting waste or for recycling please make use of them rather than throwing the accumulator in the normal trash You will often be able to return used batteries to the place where you purchase new ones Any rechargeable accumultors that you purchased from Viavi can be returned to one of our Service Centers for disposal Further instructions for returni...

Page 57: ...licable CE marking directives Please see EU Declaration of Con formity for details California Proposition 65 California Proposition 65 officially known as the Safe Drinking Water and Toxic Enforcement Act of 1986 was enacted in November 1986 with the aim of protecting individuals in the state of California and the state s drinking water and environment from excessive exposure to chemicals known to t...

Page 58: ...Compliance RoHS 58 59 Nano OSA user manual ...

Page 59: ...ica 1 844 468 4284 Viavi product specifications and descriptions in Latin America 1 954 688 5660 this document are subject to change without China 86 21 6859 5260 notice Germany 49 7121 86 0 2021 Nano OSA user manual 59 59 ...

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