Agilent Technologies 81680A Guía de usuario descargar pdf (Pagina 28)

Specifications Definition of Terms

28 Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition

Return loss

The ratio of the incident power to the reflected power expressed in dB.

Symbol: RL.

Conditions: the return loss excludes any reflections from the fiber end

used as radiation source.

Spectral width of optical source

Full width at half maximum. The 3 dB width of the optical spectrum,

expressed in nm. Symbol: FWHM.

Tot al uncertainty

The uncertainty for a specified set of operating conditions, including noise

and drift.

Conditions: power level, beam diameter or fiber type, numerical aperture,

wavelength, spectral width, ambient temperature, re-calibration period as

specified. →Noise and drift observed over a specified observation time,

with a temperature change of not more than ±∆T.

Uncertainty at reference conditions

The uncertainty for the specified set of reference conditions, including all

uncertainties in the calibration chain from the national laboratory to the

test meter.

RL 10

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Agilent Technologies 81680A Guía de usuario Pagina 28