Please note that Encircled Flux requirements will effect compliance of NATA reports generated by VTI Services as of 1st July 2014.
All Multi-mode test results used to establish conformance dated 1/7/2014 and beyond including LSPM and OTDR will need to establish encircled flux compliance at the output of the (light) source.
This can be achieved by:
- A tester manufacturers claim in writing which states encircled flux requirements have been met by design and detailing any associated conditions to achieve encircled flux requirements. These requirements may include specific cords and/or attachments.
- Compliant Encircled Flux mode conditioner attached to the (light) source- The Arden ModCon mode controller is an example of a compliant Encircled Flux mode conditioner that may be used on various sources.
VTI Services stance on test data before 1/7/2014 was to:
- assess all LSPM that had established encircled flux launch condition had been met were assessed against AS/NZS ISO/IEC 14763-3:2012.
- assess all LSPM where encircled flux launch condition had not been established to AS/NZS ISO/IEC 14763-3 2007, this in part was to address the date when contracts were entered into.
VTI Services can still assess LSPM to AS/NZS ISO/IEC 14763-3 2007 however the request would need to be provided in writing at time of assessment. The written request would form part of the report and the report will identify that conformance of the report was based on the requirements of a superseded standard
This means that any test data received for Multi-mode that does not address Encircled Flux requirements will be deemed Non-Compliant.
- Variation in mode conditions at launch can produce variation in the stated results that could enable a noncompliant link or channel to pass and a compliant link or channel to fail
- ISO/IEC 14763-3:2014 has retained encircled flux requirements