PERFORMANCE TESTING OF OPTICAL FIBRE LINKS

PERFORMANCE TESTING OF OPTICAL FIBRE LINKSFOR COMPLIANCE TO ISO/IEC 11801Using the test methods set out in ISO/IEC 14763-3 - Testing of optical fibre cablingMain changes from previous Version 6; Item 8 3-Test Cord Method for Reference Setting is default method Item 10 Field Calibration Cord, Launch & Tail Cords shall all have Reference Connectors Item 11 Method of Removal of Field Calibration Cord Adaptors for Link Testing Item 14 Insertion Loss for Reference and Non-Reference Connectors Item 15 Example of Loss Budget Calculation Updated for Reference Connectors Item 16 Links of 1/10GBE or any Channel to be Tested in 2...
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PERFORMANCE TESTING OF OPTICAL FIBRE LINKS PERFORMANCE TESTING OF OPTICAL FIBRE LINKS FOR COMPLIANCE TO ISO/IEC 11801 Using the test methods set out in ISO/IEC 14763-3 - Testing of optical fibre cabling Main changes from previous Version 6; Item 8 3-Test Cord Method for Reference Setting is default method Item 10 Field Calibration Cord, Launch & Tail Cords shall all have Reference Connectors Item 11 Method of Removal of Field Calibration Cord Adaptors for Link Testing Item 14 Insertion Loss for Reference and Non-Reference Connectors Item 15 Example of Loss Budget Calculation Updated for Reference Connectors Item 16 Links of 1/10GBE or any Channel to be Tested in 2 x Dir. at 2 x Wavelengths Item 16 Links of Known Connectors for non-1/10GBE runs can be Tested in 1 x Dir. Item 17 Qualification of Launch Cords Item 17 Use adaptors at power meter to suit the Launch Cord & Tail Cord as necessary. Item 18 Qualification of Tail & Field Calibration Cords Item 19 The 3-Test Cord Reference Setting Method Item 21 Reference Setting on LSPM Using the 1-Test Cord Method Item 22 Qualification of Tail Cord for 1-Test Cord Method Item 23 The 1-Test Cord Reference Setting Method for Non-1/10GBE Installations Item 24 Effects of Different Zeroing Methods on Loss Budget Appendix A Set Up for Fluke DSP Series with Fibre Test Head as an LSPM Tester Appendix B TIA 568-C.3 draft requirements added for American projects 3-Test Cord Method Reference Setting Is Default MethodThe 3-Test Cord Method produces more accurate test results with better consistency. Version 7_1&3T Draft 2 ADC KRONE (Asia Pacific)OF Testing ADC KRONE Requirements V7_1&3T Dr2Page 1 of 12OPTICAL FIBRE TESTING FOR COMPLIANCE TO ISO/IEC 118011 All Optical Fibres, including Per-Terminated Optical Fibres shall be CLEANED after installation and tested as a LINK for: 0 Visual inspection of all ends Recommended 1 Continuity and Maintenance of Polarity Required 2 Length Required 3 Propagation Delay Required 4 Optical Attenuation of Link: 2 x wavelengths Required (See Item 16)[LINK testing includes the 2 x end connectors. CHANNEL testing does not include the 2 x end connectors.]2 Visual inspection is not mandatory but if done, use a minimum x100 magnification for MMF, x200 for SMF, both conducted to protect the viewer’s eyes. The core is a ”PASS” if it is round, clear & featureless. The inner 1/2 of cladding is a ”PASS” if it is free of chips & cracks but it may have some polishing marks. The outer 1/2 of cladding may contain some polishing marks and chips but any chips must be less than 25% of the cladding circumference.3 Continuity and Maintenance of Polarity of each optical fibre termination is checked ensuring that “A” at the Near-End is “B” at the Far-End, and visa-versa. This can be done by; 1. visible light (eg a red light source) and inspecting opposite ends at the same time, or 2. using an LSPM that has been connected to the fibre at the far end, or 3. using an OTDR with a ‘tail cord’ connected to the correct fibre at the far end.4 Length is verified by recording the cable length markings at each end and subtracting one from the other, or by reading the length off a tester.5 Propagation Delay PD is a calculation based on; PD = 5.0 nano-seconds/metre. PD (in nS) = 5 x length (m). Some testers are capable of measuring and recording PD; otherwise it must be calculated and written on the Test Result Sheet for each fibre cable.6 Optical Attenuation (Power Loss or Insertion Loss) tests must be done at both wavelengths and in both directions for 1/10GBE applications (See Item 16). This will check for any connector or splice defects, any cracked connectors, any accidental splicing or connecting of 50 μm and 62.5 μm fibres.7 Power Loss (or Insertion Loss or Optical Attenuation) tests can be done using either, Light Source & Power Meter (LSPM), or Optical Time Domain Reflectometer (OTDR) See Item 16. If conflict exists, correct testing using LSPM shall be taken as correct. Where LSPM results exceed the Power Loss Budget, the link should be investigated with an OTDR to determine the faulty component.8 Reference Setting (Zeroing) Methods for LSPM Testers on MMF and SMF Are the connectors on the LSPM tester the same as the connectors on the Link to be tested? Is the test set-up for Simplex only testing? NO – Use the 3-Test Cord Method of Reference Setting (Eg. SC on Tester and LC on Link) YES – Use either 3-Test Cord Method or 1-Test Cord Method of Reference Setting (Eg. SC on tester and SC on both ends of Link)OF Testing ADC KRONE Requirements V7_1&3T Dr2Page 2 of 129 Use of Mandrels or Coils (for both 3 & 1-Test Cord Methods) For MMF, the LSPM Tester must have the correct Coupling Power Ratio for the cable under test. Alternatively, this can be achieved b ...