Viavi 8100 V2 Series User Manual page 332

Chapter 8 Optical Spectrum Measurement
WDM-Expert Software option
P / Pcomp
Power Peak rel
Power Integr. rel
Noise & OSNR
Noise
NOTE
The noise level depends on the noise acquisition bandwidth so the noise
level may be different to the result in the graphical trace.
NOTE
For OSA-500R, OSA-500RS and OSA-110R, in I-OSNR measure-ment
mode, the noise level is calculated based on the polarization nulling method
indicating the noise level at the channel transmission wavelength (in-band
noise measurement).
OSNR
NOTE
For OSA-500R, OSA-500RS and OSA-110R, with I-OSNR setting, this
parameter indicates the "true" I-OSNR (in-band OSNR) measured with the
polarization nulling method.
Noise Dist [THz/nm] distance between the center of the channel and the point of
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the percentage of the power of a channel signal to the sum of all
powers of the channel signal
the difference between the peak power and the peak power of
the reference channel
the difference between the integrated power and the integrated
power of the reference channel
the noise level in dBm.
Indicates the noise level measured left and right of the peak of
the optical channel (out-of-band noise measurement). The noise
level is normalized to the selected noise acquisition bandwidth
(see noise acq. Bandwidth setting).
The optical signal to noise ratio for the channel in dB.
In WDM mode this parameter indicates the out of band SNR
result based on the out-of-band noise measurement.
reference for the noise (only valid for Acquisition Mode
User Manual 78000010220 Rev. 024