ANSI SCTE 240-2017 pdf free download – SCTE Test Procedures for Testing CWDM Systems in Cable Telecommunications Access Networks.
This document describes procedures to support the measurement and characterization of the systemoptical (loss) performance through the passive points and segments of a Coarse Wavelength DivisionMultiplexing (cWDM) based Multi-point Optical Access Network (CWDM-MOAN) fiber cable plant.The procedures contained herein are designed to be used in conjunction with the relevant industry testprocedures for testing outside plant optical systems.
The term “optical fiber cable plant” , may consist of optical fiber cables, connectors,mounting panels,jumper cables, and other passive components, but may not include active components. For example, thecable plant can be a portion of a commercial services FTTX network, including optical switches or
couplers.but would exclude gain elements in the optical path.
1.2. Benefits
Current industry standard optical fiber plant test methods are intended for point-to-point optical links, andare not optimized for point-to-multi-point CWDM systems with remote outside plant wavelength-specificfilter devices. When used in conjunction with other relevant industry standardized test procedures, thisdocument provides preferred measurement principles and practices to support valid and comprehensiveevaluation of a CWDM-MOAN with remote outside plant CWDM filters in a point-to-multipoint
configuration, which is critical to accurate testing and characterization of such systems.
This document does not cover all aspects of system testing and qualification and is not intended for thefollowing purposes:
Component testing or point to point links between elements of an optical system which can beaccomplished via standard single-mode system testing.This includes systems with remote WDMfilters co-located with end-electronics.
Active components performance and qualification.
Point-to-multipoint lengths with in-line optical power splitters
Designing, specifying, ordering, installing, or maintaining CWDM-MOAN.cWDM-MOAN passive product specifications and qualifications.
Detailed test equipment operation, including referencing procedures
2. Normative References
The following documents contain provisions,which, through reference in this text, constitute provisionsof this document. At the time of Subcommittee approval, the editions indicated were valid. All documentsare subject to revision; and while parties to any agreement based on this document are encouraged to
investigate the possibility of applying the most recent editions of the documents listed below, they arereminded that newer editions of those documents might not be compatible with the referenced version.
2.1.SCTE References
• No normative references are applicable.
2.2. Standards from Other Organizations
• ANSI/TIA/-526-7 (February 2002) – OFSTP-7 – Measurement of Optical Power Loss of Installed Single-Mode Fiber Cable Plant (2003)
2.3. Published Materials
• No normative references are applicable.
5. OPTICAL TEST EQUIPMENT FOR CWDM-MOAN The basic types of test equipment suitable for testing CWDM-MOAN are the OTDR, and power meter (and source). OTDR testing is generally considered the most useful for real-time testing and troubleshooting optical networks during installation. Although it is not a direct measurement of optical loss, OTDRs are able to detect and locate discrete anomalous attenuation events. Conversely, power through testing is primarily only used as a direct measurement of the passive link loss to ensure attenuation budgets are met, or that received power levels are adequate. The ability to perform any of these types of tests on a CWDM-MOAN depends on a number of factors. These factors are discussed in detail in the section on test considerations.ANSI SCTE 240 pdf download.