CALIBRATION SYSTEM IQS-12002B R&D AND MANUFACTURING USER GUIDE
Copyright © 2006– EXFO Electro-Optical Engineering Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form, be it electronically, mechanically, or by any other means such as photocopying, recording or otherwise, without the prior written permission of EXFO Electro-Optical Engineering Inc. (EXFO). Information provided by EXFO is believed to be accurate and reliable.
Contents Contents 1 Introducing the IQS-12002B Calibration System ........................................ 1 Calibration and Verification: Assessing Conformity .................................................................3 System Overview ....................................................................................................................9 Conventions ..........................................................................................................................
Contents A Calibration Methods ...................................................................................57 Power Meter .........................................................................................................................57 FTB-7000D and FTB-7000B-B OTDR Modules ........................................................................68 B Configuring the FTB-7000D OTDR on the IQS-12002B ...............................79 Creating the GP-121311: 4.
1 Introducing the IQS-12002B Calibration System The IQS-12002B Calibration System has been designed to calibrate, verify, and adjust several types of devices. Some concept pertaining to the system are described here: ³ Calibration is a set of operations that establish, under specified conditions, the relationship between values of quantities indicated by a measuring instrument (DUT) and the corresponding values realized by standards.
Introducing the IQS-12002B Calibration System Some units (DUT) cannot be adjusted using the IQS-12002B. Depending on the DUT model, adjustment will or will not be possible. When adjustment is not possible, you can only perform calibration and verification of the unit. If adjustment is possible, you will be asked to perform calibration and verification of the DUT before and after adjustment.
Introducing the IQS-12002B Calibration System Calibration and Verification: Assessing Conformity Calibration and Verification: Assessing Conformity The latest international standards require that calibration uncertainties be evaluated and taken into account when a declaration of conformity is given for a specification.
Introducing the IQS-12002B Calibration System Calibration and Verification: Assessing Conformity Calibration Uncertainties Calibration uncertainties are expressed in the certificate.
Introducing the IQS-12002B Calibration System Calibration and Verification: Assessing Conformity The Concepts behind the IQS-12002B Calibration System The IQS-12002B Calibration System is used to verify and/or adjust a DUT (device under test) of a certain type (e.g., FPM-300) and of a certain model (e.g., FPM-302X). The application keeps a history of each tested device. To test a device, the system needs various instruments such as sources, power meters, fiber spools, etc.
Introducing the IQS-12002B Calibration System Calibration and Verification: Assessing Conformity Conformance Assessment of the Unit Status for a Certificate Compliant with ISO 17025 The conformance assessment of the power unit status, upon reception, requires a judgement on the compliance or non-compliance with specifications. The result of this judgement depends on the allowed deviation and on the gray zone introduced by calibration uncertainties.
Introducing the IQS-12002B Calibration System Calibration and Verification: Assessing Conformity ³ Outside specifications When some results are outside specification limits. Nevertheless, non compliance cannot be established because of measurement uncertainties. Results are bound by the following limits: spec < deviation ≤ spec + 0.
Introducing the IQS-12002B Calibration System Calibration and Verification: Assessing Conformity ³ Outside specifications* 5 % < deviation ≤ 7.5 % Outside specifications |deviation| > 9 % deviation > 7.5 % IMPORTANT For a pass/fail certificate (not compliant with ISO 17025), uncertainties are not taken into account for conformance assessment, therefore, there are only two zones: pass or fail.
Introducing the IQS-12002B Calibration System System Overview System Overview The system includes: ³ a computer, on which the application and database are located ³ an IQS-500 controller unit that contains the instruments requiring a warmup period ³ one or several IQS-500 expansion units that could contain both instruments that do not require a warmup period and DUTs.
Introducing the IQS-12002B Calibration System Conventions Conventions Before using the product described in this manual, you should understand the following conventions: WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Do not proceed unless you understand and meet the required conditions. CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
2 Getting Started with Your Calibration System Inserting and Removing Test Modules CAUTION Never insert or remove a module while the controller unit and its expansion units are turned on. This will result in immediate and irreparable damage to both the module and unit. To insert a module into the controller or expansion unit: 1. Exit IQS Manager and turn off all your units. 2. Remove the protective cover from the desired unused module slot. 2a.
Getting Started with Your Calibration System Inserting and Removing Test Modules 4. Insert the protruding edges of the module into the grooves of the unit’s module slot. Protruding edges (right side of module) 5 Retaining screw knob Retaining screw 5. Push the module all the way to the back of the slot, until the retaining screw makes contact with the unit casing. 6.
Getting Started with Your Calibration System Inserting and Removing Test Modules When you turn on the controller unit, the startup sequence will automatically detect your module. Note: You can insert IQ modules into your controller or expansion unit; the IQS Manager software will recognize them. However, the IQS-500 locking mechanism (retaining screw) will not work for IQ modules. To remove a module from your controller or expansion unit: 1.
Getting Started with Your Calibration System Inserting and Removing Test Modules 2. Place your fingers underneath the module or hold it by the retaining screw knob (NOT by the connector) and pull it out. Connector NO YES Retaining screw knob CAUTION Pulling out a module by a connector could seriously damage both the module and connector. Always pull out a module by the retaining screw knob. 3. Cover empty slots with the supplied protective covers.
Getting Started with Your Calibration System Installing Hardware Components Installing Hardware Components Both instruments and DUTs can be inserted in the same IQS-500 expansion unit (in specific areas). You may find useful to insert only instruments that do not require a warmup period in an expansion unit that also houses DUTs. This way, turning off the expansion unit to insert your DUTs, will not affect the instruments warmup.
Getting Started with Your Calibration System Starting and Exiting the Calibration System Application Starting and Exiting the Calibration System Application To start the Calibration System application: 1. Turn on the IQS-500 controller and expansion units. IMPORTANT Wait until the LED push button of all the modules (except the polarization or mode scrambler) light up before starting the application. Otherwise, the application will not be able to link to the hardware. 2.
Getting Started with Your Calibration System Starting and Exiting the Calibration System Application The main window (shown below) contains all the commands required to control your system. To exit the Calibration System application: 1. From the File menu, click Exit. 2. Turn off the controller and expansion units.
Getting Started with Your Calibration System Reinstalling or Upgrading the IQS-12002B Calibration System Application Reinstalling or Upgrading the IQS-12002B Calibration System Application Please be careful before uninstalling the application. When processed, all data saved in the database will be lost. This include the DUT results, DUT creation, standards creation, standard traceability, DUT traceability, certificates, all users modifications, etc.
3 Setting Up Your Calibration System Configuring Areas Specific for Instruments Since the system can house instruments and DUTs in the same expansion unit, you must specify which area is dedicated to the instruments. The application will then be able to identify which modules must be considered as instruments and which as DUTs. To configure the area for instruments: 1. From the Tools menu, select System > Configure IQS Platform. 2.
Setting Up Your Calibration System Configuring Access Levels and Passwords Configuring Access Levels and Passwords To comply with standard ISO 17025, you must be able to identify who (which user) verified and/or adjusted a particular DUT. There are three types of users: ³ Operator: verifies and adjusts DUTs, and generates certificates. ³ Manager: has the same rights as the operator and can also configure the system.
Setting Up Your Calibration System Configuring Access Levels and Passwords To create a user profile: 1. From the Tools menu, select System > User Management. 2. Click Add to create a user. 3. In the Add User box, fill in the information and click OK to confirm. Clicking Cancel takes you back to the main window. To modify a user profile: 1. From the Tools menu, select System > User Management. 2. From the Name list, select the user profile you want to modify. 3. Click Modify. 4.
Setting Up Your Calibration System Configuring the Due-for-Calibration Reminder Configuring the Due-for-Calibration Reminder Since the system relies on the accuracy of standards, the application will warn you before a standard is due for recalibration (by default, 2 months ahead). You can set the number of months before the application reminds you that a recalibration will be necessary.
Setting Up Your Calibration System Activating or Deactivating the Warmup Confirmation Activating or Deactivating the Warmup Confirmation By default, the application prompts you to select the instruments and DUT for which a warmup is wanted. You can deactivate the warmup confirmation. It is always possible to perform a warmup manually afterwards (see Launching a Manual Warmup on page 28). IMPORTANT To ensure accurate results, EXFO recommends to always perform warmup.
Setting Up Your Calibration System Configuring Main Window Appearance Configuring Main Window Appearance By default, the main window is maximized. However, you can configure its size and position. To configure main window appearance: 1. From the Tools menu, select System > Configure Main Window. 2. From the Window state list, select the desired appearance. If you select Normal, you can also specify the size and position.
4 Operating Your Calibration System Installing the EXFO Universal Interface (EUI) The EUI fixed baseplate is available for connectors with angled (APC) or non-angled (UPC) polishing. A green border around the baseplate indicates that it is for APC-type connectors, as shown below: Green border indicates APC option Bare metal (or blue border) indicates UPC option To install an EUI connector adapter onto the EUI baseplate: 1. Hold the EUI connector adapter so the dust cap opens downwards. 3 2 4 2.
Operating Your Calibration System Cleaning and Connecting Optical Fibers Cleaning and Connecting Optical Fibers IMPORTANT To ensure maximum power and to avoid erroneous readings: ³ Always clean fiber ends as explained below before inserting them into the port. EXFO is not responsible for damage or errors caused by bad fiber cleaning or handling. ³ Ensure that your patchcord has appropriate connectors. Joining mismatched connectors will damage the ferrules.
Operating Your Calibration System Viewing the Required Instruments Viewing the Required Instruments Before launching a test sequence, you can view the instruments that are required. This way, you will not have to turn off the controller or expansion units to insert the instruments and wait for the warmup period. To view the required instruments: 1. From the Configuration menu, click Scenario. 2. Select the desired DUT type and model, and click Search. 3. From the Scenarios box, select a test scenario. 4.
Operating Your Calibration System Launching a Manual Warmup Launching a Manual Warmup By default, the application prompts you at startup to select the instruments for which a warmup is wanted. If you have deactivated the warmup confirmation or if you have cancelled the warmup at the application startup, you can still launch it manually. To launch a manual warmup: From the Tools menu, select System > Start Warmup. Note: If the Warmup window does not appear, the warmup has already been completed.
Operating Your Calibration System Performing a Test Performing a Test The test sequence you have built can be used immediately or saved it for future use. Once a test is underway, you can stop it and resume it later from the point it was stopped. The application will guide you through the necessary steps from DUT creation to printing results. You can generate reports that are ISO/IEC 17025 compliant. They can take into account measurement uncertainties or not (i.e.
Operating Your Calibration System Performing a Test To launch a test sequence: 1. From the Operations menu, click Create Sequence. 2. Select Search an existing DUT and enter the DUT serial number. If the DUT already exists in the database, the application will retrieve it. If it does not exist, the application will create it. If necessary, confirm the creation of the DUT. Note: If you click Next without entering a serial number, the application displays the list of created DUTs.
Operating Your Calibration System Performing a Test 3. Enter the information in the appropriate boxes. Mandatory information is indicated by a “*”. To visualize DUTs and their serial numbers To create a customer in the database 4. Click OK to confirm. 5. The application displays DUT information; click Next. 6. Prepare your DUT as shown on screen and click Next.
Operating Your Calibration System Performing a Test 7. Under Work type, select the operation you want to perform. The available choices depend on the type of device you are testing and on available instruments. To indicate if the test is performed by your company or on behalf of EXFO. To add the selected comments to your report. 8. Under Additional info, enter the information that will appear in the report. 9. Click Next. 10.
Operating Your Calibration System Performing a Test 12. From the Measurement and Adjustment Procedure Selection box, select the scenarios you want to include in your test sequence. Note: Some scenarios cannot be cleared from the list. These are mandatory scenarios and must be performed for the selected DUT. 13. To create custom specifications for a scenario, proceed as follows: 13a.Select the scenario you want to customize and click Create. 13b.
Operating Your Calibration System Performing a Test 14. Back in the Measurement and Adjustment Procedure Selection box, make sure Custom Specifications appears in the Specification revision list. 15. Click Next and click Complete to close the wizard. The application will prompt you to confirm if you want to perform the acquisition now or later. 16. If the required standards have not been added to the database yet, the application will prompt you to add them; proceed as follows: 16a.Click OK. 16b.
Operating Your Calibration System Performing a Test 17. When the application prompts you, select the instruments that must have a warmup period and click OK. 18. Follow the instructions appearing on screen. At the end of a scenario, the application displays the results. Note: Before printing the report, you can still modify the information it contains, but you cannot modify the measures.
Operating Your Calibration System Performing a Test 19. The application displays a preview of the report. It will also be possible to print or export results afterwards (see Printing or Exporting Results on page 37). Note: To let the application consider the test sequence completed, you must perform a print or export of the report. As long as this is not done, the sequence will remains in the Open Sequence dialog windows and the results will not be accessible in the DUT history or traceability reports.
Operating Your Calibration System Printing or Exporting Results Printing or Exporting Results You can print or export results of the DUTs for previous test sequences. To print or export results: 1. From the Configuration menu, select DUT > Search. 2. Enter criteria to retrieve the DUT information and click Search. IMPORTANT If you leave the Serial number box empty, the system will retrieve all DUTs matching the information entered in the other boxes and lists. 3. Click History.
Operating Your Calibration System Printing or Exporting Results 4. From the DUT History box, select the row indicating that the report has been printed and click Certificate. Note: Upon clicking Certificate, the systems offers you the possibility to make modifications before printing the report. If you choose to do so, a box opens to let you make the changes and a note is automatically added in the “As found” and “As left” fields of the report. 5.
Operating Your Calibration System Printing Reports Printing Reports You can view or print traceability results of the DUTs or Standards you have tested or used in previous test sequences. To view or print Forward Traceability results: 1. From the Report menu, click Forward Traceability. 2. In the Serial number box, type the DUT serial number (leave the box empty to get all tested DUTs) and click Search. 3. Select the desired DUT in the list. 4. Click History.
Operating Your Calibration System Printing Reports 5. From the DUT History box, select the event for which you want to view the traceability information. Note: The information depends on the date of the selected event. On the Forward Traceability Report, the information starts with the date the DUT was added and ends with the date of the selected event. To see all the information, you must select the event with the most recent date. 6.
Operating Your Calibration System Printing Reports 3. Select the desired Standard in the list. 4. Click History. 5. From the Standard History box, select the event for which you want to view the traceability information. Note: The information depends on the date of the selected event. On the Reverse Traceability Report, the information starts with the date of the last calibration and ends with the current date. To see all the information, you must select the event with the most recent date.
5 Troubleshooting This chapter presents a list of common problems and their solution, the technical support offered on the web and at EXFO facilities, and product shipping information. Solving Common Problems Problem Communication loss between PC and IQS system Possible cause You have logged yourself out. Solution Logging out closes the communication port. Make sure that all operations of the IQS system are completed before you log out.
Troubleshooting Finding Information on the EXFO Web Site Problem Possible cause Solution Error message Incorrect connections Disconnect the unit, close all applications, and restart the system. “Catastrophic failure” for the FOT-10A or Make sure the connection procedure is FOT-10A unit. properly done. Calibration has a Fail in Distance result. The automatic positioning of events for an FTB-7000B-B OTDR is incorrect. Positioning must be done manually.
Troubleshooting Contacting the Technical Support Group Contacting the Technical Support Group To obtain after-sales service or technical support for this product, contact EXFO at one of the following numbers. The Technical Support Group is available to take your calls from Monday to Friday, 7:30 a.m. to 8:00 p.m. (Eastern Time in North America). Technical Support Group 400 Godin Avenue Quebec (Quebec) G1M 2K2 CANADA 1 866 683-0155 (USA and Canada) Tel.: 1 418 683-5498 Fax: 1 418 683-9224 support@exfo.
Troubleshooting Transportation Transportation Maintain a temperature range within specifications when transporting the unit. Transportation damage can occur from improper handling. The following steps are recommended to minimize the possibility of damage: 46 ³ Pack the unit in its original packing material when shipping. ³ Avoid high humidity or large temperature fluctuations. ³ Keep the unit out of direct sunlight. ³ Avoid unnecessary shock and vibration.
6 Maintenance To help ensure long, trouble-free operation: ³ Always clean fiber-optic connectors before using them. ³ Keep the unit free of dust. ³ Clean the unit casing and front panel with a cloth slightly dampened with water. ³ Store unit at room temperature in a clean and dry area. Keep the unit out of direct sunlight. ³ Avoid high humidity or significant temperature fluctuations. ³ Avoid unnecessary shocks and vibrations.
Maintenance Cleaning EUI Connectors Cleaning EUI Connectors Regular cleaning of EUI connectors will help maintain optimum performance. There is no need to disassemble the unit. IMPORTANT If any damage occurs to internal connectors, the module casing will have to be opened and a new calibration will be required. To clean EUI connectors: 1. Remove the EUI from the instrument to expose the connector baseplate and ferrule. Turn Pull Push 2. Moisten a 2.
Maintenance Cleaning EUI Connectors 4. Gently turn the cleaning tip one full turn, then continue to turn as you withdraw it. 5. Repeat steps 3 to 4 with a dry cleaning tip. Note: Make sure you don’t touch the soft end of the cleaning tip. 6. Clean the ferrule in the connector port as follows: 6a. Deposit one drop of isopropyl alcohol on a lint-free wiping cloth. IMPORTANT Isopropyl alcohol may leave residues if used abundantly or left to evaporate (about 10 seconds).
Maintenance Cleaning Fixed Connectors Cleaning Fixed Connectors Regular cleaning of connectors will help maintain optimum performance. Do not try to disassemble the unit. Doing so would break the connector. To clean fixed connectors: 1. Fold a lint-free wiping cloth in four to form a square. 2. Moisten the center of the lint-free wiping cloth with only one drop of isopropyl alcohol. IMPORTANT Alcohol may leave traces if used abundantly.
Maintenance Cleaning Fixed Connectors IMPORTANT Alcohol may leave traces if used abundantly. Avoid contact between the tip of the bottle and the cleaning tip, and do not use bottles that distribute too much alcohol at a time. 7. Slowly insert the cleaning tip into the connector until it reaches the ferrule inside (a slow clockwise rotating movement may help). 8 7 9 8. Gently turn the cleaning tip one full turn. 9. Continue to turn as you withdraw the cleaning tip. 10.
Maintenance Cleaning Detector Ports Cleaning Detector Ports Regular cleaning of detectors will help maintain measurement accuracy. IMPORTANT Always cover detectors with protective caps when unit is not in use. To clean detector ports: 1. Remove the protective cap and adapter (FOA) from the detector. 2. If the detector is dusty, blow dry with compressed air. 3. Being careful not to touch the soft end of the swab, moisten a cleaning tip with only one drop of isopropyl alcohol.
Maintenance Cleaning the FOA Connector Adapter Cleaning the FOA Connector Adapter Make sure that the FOA connector adapter is properly cleaned to assure its accuracy during calibration. To clean your FOA connector adapter: 1. Remove the FOA from the instrument. 2. Slowly insert and gently rotate a cleaning tip that has been dipped in isopropyl alcohol into the FOA. 3. Insert a dry cleaning tip to dry. 4. Blow away any remaining lint with clean compressed air. 5.
Maintenance Using a Standard after Recalibration Using a Standard after Recalibration When a standard is back from recalibration, you must add its calibration information and certificate to the application’s database. Otherwise, you will not be able to use the module. To use a standard after recalibration: 1. From the Configuration menu, click Calibration Instruments> Standards. 2. Select the appropriate standard from the list. 3. Click History.
Maintenance Using a Standard after Recalibration 4. Click Add Calibration Event. 5. The authority name and calibration date are automatically set. Click and add the calibration certificate file. 6. When you have finished, click OK. Close all windows to return to the main window. The newly calibrated standard is now available.
A Calibration Methods This chapter presents the methods, on which are based the procedures of the IQS-12002B Calibration System., for the calibration of power meters and OTDRs. Power Meter The calibration of a power meter includes the calibration of its absolute power and, for a high-end unit (e.g., IQS power meter), the calibration of its linearity. Absolute Power Calibration Power meter calibration is performed by comparing it with an IQS-1502 Calibration Power Meter (working standard).
Calibration Methods Power Meter At all wavelengths, the output power of the laser sources is measured several times alternating between the calibration power meter and the power meter under test (DUT). A minimum of five responsivity constants are calculated for the DUT and are statistically analyzed to ensure that they are within appropriate limits (e.g. the calculated values must all be inside a certain range of values).
Calibration Methods Power Meter Calibration System 59
Calibration Methods Power Meter Power meter calibration at 1310 nm and 1550 nm @ 23 °C ± 1 °C influence i 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 uncertainty Unit probability distribution divisor standard uncertainty sensitivity coefficient u (xi ) ci ui (y ) (dB) rectangular normal rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular re
Calibration Methods Power Meter Power meter calibration at 1625 nm @ 23 °C ± 1 °C influence i 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 uncertainty Unit probability distribution divisor standard uncertainty sensitivity coefficient u (xi ) ci ui (y ) (dB) rectangular normal rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular rectangular r
Calibration Methods Power Meter Linearity Calibration The nonlinearity of the power meter should be calibrated to ensure accurate measurements at power levels different from the calibration level and for relative measurements such as loss and gain measurements.
Calibration Methods Power Meter However, before performing the linearity calibration, both branch of the coupler have to be balanced (i.e. have the same output power). Balancing the linearity setup is the basis of this method. It requires a subscript coupler to split the power in two and a shutter on both branches in order to block light or let it through. Power is then recombined using a second coupler before sending the light to the power meter under test.
Calibration Methods Power Meter To measure nonlinearity: 1. Set the attenuators in the two paths so that the power measured on the meter is the same whether the light is coming from branch a or from branch b. 2. Open both shutters and measure the total power from both branches simultaneously: Ptotal,i. 3. Close the shutter on branch b and measure the power on branch a: Pa,i. 4. Close the shutter on branch a, open the shutter on branch b, and measure the power on branch b: Pb,i. 5.
Calibration Methods Power Meter 8. At the end, the global nonlinearity is the sum of all the local nonlinearities expressed in decibels (dB), starting calculations from the reference power level where the nonlinearity is zero (higher order terms are negligible). The equations to use are as follows: For n < 0 n +1 NLglobal ( Pn ) = −∑ NLi i =0 For n = 0 NLglobal ( P0 ) = 0 For n > 0 n NLglobal ( Pn ) = + ∑ NLi i =1 where: n < 0 indicates power levels lower than the reference power.
Calibration Methods Power Meter To cover a bigger area of the power meter range, once the test done by decreasing the power is completed, shift the first attenuator by 1.5 dB and then start the test at increasing power levels. Typical uncertainties of this method include: 66 ³ All possible power fluctuations while measuring Pa, Pb, and Ptotal such as fluctuations of the source due to drifts. ³ Improper balancing of the output powers of each coupler branch (Pa and Pb).
Calibration Methods Power Meter The errors for each step are cumulative and will add to the errors of the preceding steps. The system uses an expanded uncertainty (U) value that is included in the report. The following table presents the method used to establish the uncertainty for the linearity calibration.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules FTB-7000D and FTB-7000B-B OTDR Modules Calibration of the FTB-7000D OTDR includes the event and attenuation dead zones, dynamic range, injection levels, linearity, front connector position, and distance. Calibration of the FTB-7000B-B family, includes test or verification of event and attenuation dead zones, dynamic range, injection level, and distance.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules Dynamic Range Test The dynamic range is verified using various combinations of pulse duration and distance range with the averaging time set at 45 s. Only one pulse duration is included in the calibration report, usually 10 μs for singlemode and 1 μs for multimode. The dynamic range is the difference (in dB) between the launch level (backscatter trace extrapolated at distance zero) and the noise floor.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules Linearity Test Linearity is verified by looking at variations in loss measurements made over a same portion of fiber at different levels of attenuation (a variable optical attenuator (VOA) is included in the IQS-12002B Calibration System). This is performed at the shortest wavelength present in the unit both each multimode and singlemode ports. The pulse used for multimode wavelengths is 1 μs and, for singlemode wavelengths, it is 10 μs.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules The fiber section chosen for the loss measurement must be as far as possible from the VOA to reduce errors due to recovery on the OTDR. Usually, the fiber section is chosen to roughly emulate a 0.5-dB loss. The initial measurement, performed at the minimum attenuation of the VOA, is considered as the reference loss (Aref). Following measurements are done at higher attenuation.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules Distance Calibration An OTDR calculates the length of a fiber section by measuring the time of flight of a light pulse between its launch point and the detection of a fraction of its reflection. Using the time of flight, the speed of light, and the index of refraction of the fiber, one can calculate the length of a fiber link.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules Distance Calibration Method Distance is calibrated with the use of a reference fiber that is traceable to a national metrology institute (e.g. METAS, NPL, NIST, NRC). The following diagram shows the setup used by EXFO for distance calibration.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules Distance Measurement Specification Distance specification depends on the location offset, distance scale deviation, and sampling resolution. S = ± ( location offset + scale deviation × distance + sampling resolution ) For example, for an OTDR of the FTB-7000D family, the distance specification is: S = ± ( 0.75 + 0.0025 % × distance + 0,04 ) m Note: For FTB-7000B-B, displayed resolution is 1 m for a distance between markers greater than 1 km.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules EXFO determines the true central wavelength and distribution for the type of lasers used in an OTDR family (e.g., FTB-7000D, AXS-100). The reference distance used in the OTDR calibration takes into account the true central wavelength of the OTDR family. The following table is an example for an OTDR of the FTB-7000D family.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules Uncertainties The uncertainties for distance calibration are as follows: ³ Reference fiber (as per the calibration certificate issued by the national laboratory where the fiber was calibrated). ³ Environment temperatures. ³ Chromatic dispersion. ³ Wavelength differences: calibration wavelength for the reference fiber versus OTDR wavelength, and OTDR wavelength uncertainties. ³ OTDR resolution.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules Dead Zone Calibration The dead zone depends on the intensity of the reflectance. Compliance to the specification must be done for a reflectance of –35 dB in multimode and –45 dB in singlemode. Note: There is no uncertainty value associated with this calibration. Attenuation Dead Zone The attenuation dead zone is the distance between markers A and B on the OTDR trace presented below.
Calibration Methods FTB-7000D and FTB-7000B-B OTDR Modules Event Dead Zone The event dead zone is the distance between markers A and B on the OTDR trace presented below. Dead zone Markers are positioned on both side of the peak, 1.5 dB below the maximum peak value.
B Configuring the FTB-7000D OTDR on the IQS-12002B Test equipment is configured at the factory before shipping. The procedures presented in this document address the case when the IQS-12002B detects a new instrument or when a particular instrument has not been configured. Note: The given instructions are for the singlemode FTB-7000D OTDR; however, you can use the same procedures for the multimode model (lengths, tolerances, and uncertainties can differ).
Configuring the FTB-7000D OTDR on the IQS-12002B When you create a test sequence for an FTB-7000D, you may receive the following message: Click OK to proceed with the creation of a calibration instrument.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121311: 4.4-km Fiber Spool as a Calibration Instrument Creating the GP-121311: 4.4-km Fiber Spool as a Calibration Instrument This section presents the procedure to create the 4.4-km fiber spool as a calibration instrument. To create the calibration instrument: 1. From the Add a standard window, enter the relevant information: 1a.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121311: 4.4-km Fiber Spool as a Calibration Instrument 1c. Enter the inventory number and comments if necessary. Note: When the basic model of the calibration instrument is configured to appear in the Calibration Certificate produced by the IQS-12002B, the information that you enter in the Inventory number text box will appear in the Calibration Certificate in the section entitled Standards used to establish traceability. 1d.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121317: 17.6-km Fiber Spool as a Calibration Instrument Creating the GP-121317: 17.6-km Fiber Spool as a Calibration Instrument This section presents the procedure to create the 17.6-km fiber spool as a calibration instrument. To create the calibration instrument: 1. From the Add a standard window, enter the relevant information: 1a.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the IQS-3100BW Variable Attenuator as a Calibration Instrument Creating the IQS-3100BW Variable Attenuator as a Calibration Instrument This section presents the procedure to create the IQS-3100BW Variable Attenuator as a calibration instrument. To create the calibration instrument: 1. From the Add a standard window, enter the relevant information: 1a.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the IQS-3100BW Variable Attenuator as a Calibration Instrument 1c. Enter the inventory number and comments if necessary. Note: When the basic model of the calibration instrument is configured to appear in the Calibration Certificate produced by the IQS-12002B, the information that you enter in the Inventory number text box will appear in the section entitled Standards used to establish traceability. 1d.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121723: 50-m Launch Fiber as a Calibration Instrument Creating the GP-121723: 50-m Launch Fiber as a Calibration Instrument This section presents the procedure to create the 50-m launch fiber as a calibration instrument. To create the calibration instrument: 1. From the Add a standard window, enter the relevant information: 1a.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121723: 50-m Launch Fiber as a Calibration Instrument 1c. Enter the inventory number and comments if necessary. Note: When the basic model of the calibration instrument is configured to appear in the Calibration Certificate produced by the IQS-12002B, the information that you enter in the Inventory number text box will appear in the Calibration Certificate in the section entitled Standards used to establish traceability. 1d.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121723: 50-m Launch Fiber as a Calibration Instrument 4. From the View Standard Parameters window, click Edit to enter the length of the reference standard given on the acceptance test plan for all requested wavelengths (e.g., 56.1 m). IMPORTANT Ensure that the Length Tolerance parameter is set to 5 m. 5. Click Close.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121392: Distance Reference Standard Creating the GP-121392: Distance Reference Standard This section presents the procedure to create a distance reference standard. To create the reference standard: 1. From the Add a standard window, enter the relevant information: 1a. Match the calibration instrument appearing in the Calibration Instrument list to the instrument you intend to create.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121392: Distance Reference Standard 2. Click OK. 3. From the Add a Calibration Event window, enter the date as written on the instrument calibration certificate, and click OK.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121392: Distance Reference Standard 4. From the View Standard Parameters window, click Edit to enter the length of the reference standard given on the acceptance test plan for each wavelength (Optical length at central wavelength (m)) along with its uncertainty (Uncertainty (m)). Note: If the IQS-12002B requests information on a wavelength not given in the acceptance test plan (e.g.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121310: Calibration Instrument for Singlemode, Front-Connector Position Creating the GP-121310: Calibration Instrument for Singlemode, Front-Connector Position (UPC Connectors) This section presents the procedure to create the calibration instrument for the singlemode, front-connector position for UPC connectors. To create the calibration instrument: 1. From the Add a standard window, enter the relevant information: 1a.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121310: Calibration Instrument for Singlemode, Front-Connector Position 1c. Enter the inventory number and comments if necessary. Note: When the basic model of the calibration instrument is configured to appear in the Calibration Certificate produced by the IQS-12002B, the information that you enter in the Inventory number text box will appear in the section entitled Standards used to establish traceability. 1d.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121310: Calibration Instrument for Singlemode, Front-Connector Position 4. From the View Standard Parameters window, click Edit to enter the length given on the acceptance test plan for all requested wavelengths. IMPORTANT Do not change the Length_Tolerance parameter. 5. Click Close. IMPORTANT Now that you have created a calibration instrument for UPC connectors, you must manually create a calibration instrument for APC connectors.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-120963: Singlemode Dead-Zone Calibration Instrument Creating the GP-120963: Singlemode Dead-Zone Calibration Instrument This section presents the procedure to create the dead-zone calibration instrument. This calibration instrument is created using the length given on the acceptance test plan. To create the calibration instrument: 1. From the Add a standard window, enter the relevant information: 1a.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-120963: Singlemode Dead-Zone Calibration Instrument 1c. Enter the inventory number and comments if necessary. Note: When the basic model of the calibration instrument is configured to appear in the Calibration Certificate produced by the IQS-12002B, the information that you enter in the Inventory number text box will appear in the section entitled Standards used to establish traceability. 1d. Select Calibrated (no recalibration required). 2.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-120963: Singlemode Dead-Zone Calibration Instrument 5. From the View Standard Parameters window, click Edit to enter the resulting length for all requested wavelengths. IMPORTANT Do not change the Length_Tolerance parameter. 6. Click Close.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121310: Calibration Instrument for Singlemode, Front-Connector Position Creating the GP-121310: Calibration Instrument for Singlemode, Front-Connector Position (APC Connectors) This section presents the procedure to create the calibration instrument for the singlemode, front-connector position for APC connectors. To create the calibration instrument: 1. From the Configuration menu, select Calibration Instruments > Standards and click Add. 2.
Configuring the FTB-7000D OTDR on the IQS-12002B Creating the GP-121310: Calibration Instrument for Singlemode, Front-Connector Position Note: When the basic model of the calibration instrument is configured to appear in the Calibration Certificate produced by the IQS-12002B, the information you enter in the Inventory number box will appear in the Calibration Certificate in the section entitled “Standards used to establish traceability”. 2d. Select Calibrated (no recalibration required) and click OK. 3.
Index Index A access levels, configuring ............................ 20 activating warmup confirmation ................. 23 after-sales service ........................................ 45 application, starting and exiting.................. 16 B beginning test ............................................. 29 C caution of personal hazard................................. 10 of product hazard.................................. 10 cleaning detector ports........................................
Index M S main window appearance........................... 24 maintenance detector ports........................................ 52 EUI connectors....................................... 48 fixed connectors .................................... 50 front panel ............................................ 47 general information............................... 47 manual warmup, performing ...................... 28 modifying main window ........................................ 24 user profiles.................
Index W warmup confirmation, activate or deactivate ...... 23 window, show or hide........................... 23 warmup, manual.........................................
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