Keysight Technologies 86120B, Руководство пользователя

Страница: 236 / 273

234
Specifications and Regulatory Information
Definition of Terms
Flatness refers to the maximum amplitude error in a measurement between two
lines that are separated in wavelength by no more than the specified amount.
Linearity indicates the maximum power error in measuring the change in power of
one laser line.
Polarization Dependence indicates the maximum displayed power variation as the
polarization of the input signal is varied.
Display Resolution indicates the minimum incremental change in displayed power.
Sensitivity Sensitivity is defined as the minimum power level of a single laser-line input to mea-
sure wavelength and power accurately. A laser line with less than the minimum
power may be measured but with reduced wavelength and power accuracy. For mul-
tiple laser-lines input, sensitivity may be limited by total input power.
Selectivity Selectivity indicates the ability to measure the wavelength and power of a weak laser
line in the proximity of a specified stronger laser line and separated by the specified
amount.
Input Power Maximum displayed level indicates the maximum total input power (total of all laser
lines present) to accurately measure wavelength and power.
Maximum safe input power indicates the maximum total input power (total of all
laser lines present) to avoid permanent optical damage to the instrument.
Maximum Number
of Lines Input Maximum number of lines input is the maximum number of displayed lines. If more
than 100 lines are input, only the 100 longest wavelength lines are displayed.
Input Return Loss Input Return Loss indicates the optical power reflected back to the user’s fiber cable
relative to the input power. It is limited by the return loss of the front-panel connec-
tor, and assumes the user’s connector is good.
Measurement Cycle
Time Measurement cycle time refers to the cycle time when measuring wavelength and
power of laser lines. Specific advanced applications may require longer cycle times.