tailieunhanh - Performance testing of optical fibre links

Tài liệu tham khảo về Performance testing of optical fibre links | KRONE PERFORMANCE TESTING OF OPTICAL FIBRE LINKS FOR COMPLIANCE TO AS NZS 3080 Main Changes from Version 4 Item 2 MMOF 300m can have some microscopic marks on core cladding Item 9 The 4 x Acceptance Criteria for Standards Conformance are listed Item 13 LSPM testing is at Both Wavelengths Both Directions report highest Item 13 OTDR Testing is at Both Wavelengths Both Directions report average Item 17 OTDR Testing using Launch Tail cords added Item 18 OTDR Traces of Good results added Item 18 Reading OTDR Results for Length and Loss added Item 19 OTDR Trace of Bad Ghosting result added Item 20 Return Loss on OF cabling is not an ADC KRONE Warranty requirement Version Released Version ADC KRONE Australia OF Testing Requirements ADC KRONE V4_1 050320-docPage 1 of 7 KRONE OPTICAL FIBRE TESTING FOR COMPLIANCE TO AS NZS 3080 1 All links made from Optical Fibres shall be tested after terminations for 1 Continuity and Maintenance of Polarity Required 2 Length Required 3 Propagation Delay Required 4 Optical Attenuation 2 x wavelengths 2 x direction. Required 2 Visual inspection is not mandatory but if done uses a minimum x 200 magnification for MMOF x 400 for SMOF and is conducted to protect the viewer s eyes. For multimode fibre runs of less than 300m the central core and cladding can have some marks visible as long as they are less than 10 of the surface in the core area. For multimode greater than 300m and for singlemode the central core should be free of marks and be fully visible. The core and inner 1 3 of cladding is a PASS if it is round clear featureless. The outer 2 3 of cladding may contain some marks but they 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 usually a red light source and inspecting opposite ends at the same time or 2. using of a LSPM that