Site Survey Form Generic Format - Coastal Environmental Systems

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SITE SURVEY REPORT – location nameResistance Test (Acceptable) To be performed if Decibel Loss Test cannot be performed.Measure the resistance of each pair, from the location where the equipment (FDCU, RLIM, orWorkstation) is to be located, while a short is placed across the pair at the location where the DPUwill reside.Report the test results in the format shown below. Verify that the loss does not exceed themaximum indicated.Resistance Test Results(Table based on maximum distances converted to ohms.)Revise Table as requiredTest PointsDiscontinuity FDCU 14L toDPUDiscontinuity FDCU 32R toDPURLIM Bldg. xxxx to DPUWireSizeMax Resistance(See MaximumResistance Table)ActualResistancePass/FailMaximum Resistance(Maximum distances converted to ohms)19 AWG 22 AWG 24 AWG 26 AWGFDCU or RLIM 700 Ω 1360 Ω 1550 Ω 1760 ΩWorkstation 1120 Ω 1185 Ω 1550 Ω 1760 ΩNote: If for any line the overall ohms reading exceeds the value in the above table, the AWOSwill not have viable communications for that line. An alternative solution must then be sought.Fiber Optic Line DriversComplete circuit testing (versus segment testing) needs to be performed to ensure that theinstalled fiber optic cable routing will allow the AWOS to function as designed. The Decibel LossTest is the preferred methodTest results falling in the acceptable range will provide a high degree of confidence that thecommunications lines will support a successful installation of the system.All tests on the physical communication lines must be carried out from end-to-end (DPUdemarcation to FDCU, RLIM, or Workstation demarcation).Optical transmission distance is limited to optical loss of the fiber and any additional lossintroduced by connectors, splices and patch panels.Distance can also be limited by fiber bandwidth.Site Survey Form Generic Format 6-25-13.docPage 19© 2013 Coastal Environmental Systems, Inc.
SITE SURVEY REPORT – location nameTherefore, the optic signal level loss has to be determined at the END POINTS of the fiber opticlink.The signal loss for IFS D1000 line drivers should be less or equal to the values listed in the belowtable:Fiber Optic CableTypeMulti-mode *62.4/125 µmMulti-mode *62.5/125 µmSingle-mode9/125 µmFiber OpticLine DriverModelD1010D1020D1030DescriptionRS-232Transceiver 850 nmRS-232Transceiver 1310 nmRS-232Transceiver 1310 nmMaximal SignalLoss11 dB10 dB17dB* For 50/125 µm fiber subtract 4 dB from the Maximal Signal Loss.Decibel Loss Test ResultsRevise Table as requiredTest PointsPrimary FDCU to DPUDiscontinuity FDCU to DPURLIM to DPUMax dBLoss17 db17 db17 dbActual dBLossPass/FailSite Survey Form Generic Format 6-25-13.docPage 20© 2013 Coastal Environmental Systems, Inc.
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Site Survey Form Generic Format - Coastal Environmental Systems

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