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2016:nsrc-tein-lernet:cabling_systems_specifications

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2016:nsrc-tein-lernet:cabling_systems_specifications [2016/02/29 07:58]
philip [Fiber Optic System]
2016:nsrc-tein-lernet:cabling_systems_specifications [2016/02/29 07:59] (current)
philip [Testing]
Line 279: Line 279:
 All fiber shall be certified by the installer. ​ Certification shall consist of loss testing in both directions on each fiber at two wavelengths specified below. ​ Loss tests shall be recorded for each direction on each fiber for each wavelength. ​ These values shall be used to perform acceptance calculations described below. All fiber shall be certified by the installer. ​ Certification shall consist of loss testing in both directions on each fiber at two wavelengths specified below. ​ Loss tests shall be recorded for each direction on each fiber for each wavelength. ​ These values shall be used to perform acceptance calculations described below.
  
-  - Multi Mode fiber wavelength testing shall be at 850nm and 1310nm. +  -  Multi Mode fiber wavelength testing shall be at 850nm and 1310nm. 
-  - Single Mode fiber wavelength testing shall be at 1310nm and 1550nm.+  -  Single Mode fiber wavelength testing shall be at 1310nm and 1550nm.
  
 Contractor shall perform span loss calculations to compute the maximum allowed loss for each span at each wavelength. ​ These span loss calculations shall be compared to measured performance. ​ Span loss shall be calculated based on manufacturer guaranteed performance at the measured wavelength adjusted by the length of the cable. ​ To that figure, span loss shall add .5dB for each mated connector and .2dB for each fusion splice. ​ This figure is the maximum loss at that wavelength that is allowed for the cable span.  For example, if the manufacturer warrants that a cable has .4dB loss per km at a specific wavelength and the installed cable is 1.5km and that cable has one fusion splice, the maximum allowed loss would be the sum of: Contractor shall perform span loss calculations to compute the maximum allowed loss for each span at each wavelength. ​ These span loss calculations shall be compared to measured performance. ​ Span loss shall be calculated based on manufacturer guaranteed performance at the measured wavelength adjusted by the length of the cable. ​ To that figure, span loss shall add .5dB for each mated connector and .2dB for each fusion splice. ​ This figure is the maximum loss at that wavelength that is allowed for the cable span.  For example, if the manufacturer warrants that a cable has .4dB loss per km at a specific wavelength and the installed cable is 1.5km and that cable has one fusion splice, the maximum allowed loss would be the sum of:
2016/nsrc-tein-lernet/cabling_systems_specifications.txt · Last modified: 2016/02/29 07:59 by philip