# OSNR

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> Markdown URL: https://mediated.wiki/source/OSNR.md
> Source: https://en.wikipedia.org/wiki/OSNR
> Source revision: 1334458134
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

**OSNR**, a four-letter acronym or abbreviation, may refer to:

- [Optical signal-to-noise ratio](/source/Optical_signal-to-noise_ratio)
- [Optical spectrum analyzer](/source/Optical_spectrum_analyzer)
- [Optical performance monitoring](/source/Optical_performance_monitoring)
- Other / Signature Not Required - a delivery classification used by some shippers.

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Adapted from the Wikipedia article [OSNR](https://en.wikipedia.org/wiki/OSNR) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/OSNR?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.