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Definition of Terms
Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition
Attenuation range
Attenuation range that can be set at the attenuator and for which the specifications apply (if
not differently stated).
Attenuation setting mode
Operating mode where the user sets the desired attenuation. The power control function (if
available) is deactivated in this mode (see also power setting mode).
NOTE
This operating mode is applicable to attenuators with power control only.
Attenuation uncertainty
The maximum possible difference (in dB) between the displayed Attenuation and actual
Attenuation.
Conditions: Attenuator set to the wavelength of the source. Input polarization, temperature
range, maximum power and input mode (multimode attenuators only) as specified. Other
conditions as specified.
Measurement: With Fabry-Pérot laser source of applicable wavelength, polarization
scrambler (if applicable), and optical power meter.
NOTE
When using a polarized source, the attenuation uncertainty increases by ± half the
specified polarization dependent loss of the attenuator
(if specified).
Constant operating conditions
This generally includes constant values of temperature, humidity, wavelength, input power
level, polarization state and mode distribution (for multimode attenuators), if the quantity is
not explicitly subject to variation.
Specifications
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