Data record `std.tia-526-7-a.method.three-cord`

Verified 2026-10-25 Confidence: High

Annex B of ANSI/TIA-526-7-A (2015) sets the three-cord reference with launch, substitution and receive cords in series and then swaps the cabling in for the substitution cord, so the two connections used in referencing are subtracted and the result approximately excludes the end connections.

Provenance. Where this record comes from and where it is used: the cited source, the record itself and the entry that cites it.

Provenance: the chain from source to entry.
Step	Item	Detail
Source	ANSI/TIA-526-7-A	Licensed standard, clause Annex B
Data record	std.tia-526-7-a.method.three-cord	Verified 2026-10-25
Entry	ANSI/TIA-526-7-A	No revisions

Subject: ANSI/TIA-526-7-A (Standards)
Kind: Method fact
Source: ANSI/TIA-526-7-A, 2015 edition, clause Annex B, page 32, Measurement of Optical Power Loss of Installed Single-Mode Fiber Cable Plant, Adoption of IEC 61280-4-2 edition 2: Fibre-Optic Communications Subsystem Test Procedures, Part 4-2: Installed Cable Plant, Single-Mode Attenuation and Optical Return Loss Measurement, TIA.

History

Every recorded change to this data record, oldest first.
Date	Change
2026-10-25	created
2026-10-25	review_status unreviewed -> software_reviewed

Cite this page

Cite the governing standard for the fact itself; cite this page as the finding aid.

"Data record std.tia-526-7-a.method.three-cord." Fiber Optic Reference. 2026-10-25. https://www.fiberopticreference.com/data/std.tia-526-7-a.method.three-cord/.

Fiber Optic Reference, Data record std.tia-526-7-a.method.three-cord (Oct. 25, 2026), https://www.fiberopticreference.com/data/std.tia-526-7-a.method.three-cord/.

@misc{etr-data-std-tia-526-7-a-method-three-cord,
  title = {Data record std.tia-526-7-a.method.three-cord},
  howpublished = {\url{https://www.fiberopticreference.com/data/std.tia-526-7-a.method.three-cord/}},
  organization = {Fiber Optic Reference},
  publisher = {Fiber Optic Reference},
  year = {2026},
  note = {last substantive change 2026-10-25}
}

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