Keysight Technologies N77 Series User Manual page 60

3 Specifications and Regulations
Compliance
N O T E
60
Attenuation setting mode
Operating mode where the user sets the desired attenuation. The power
control function is deactivated in this mode (see also
mode" on page 66).
Attenuation accuracy (uncertainty)
The maximum possible difference (in dB) between the displayed
"Attenuation" (see, "Attenuation" on page
"Attenuation" (see, "Attenuation" on page
Figure 41 Attenuation accuracy (uncertainty)
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.
When using a polarized source, the attenuation uncertainty increases by ± half the
specified polarization dependent loss of the attenuator (if specified).
Averaging time
Specifies the period during which the power meter or monitor power
meter takes readings from the photodetector. The displayed power
result is the (arithmetical) average of these readings.
"Power setting
59) and actual
59).
Keysight N77xx Series