6-16
IM AQ6376-01EN
FITTING ALGO
This parameter is used to select the interpolation algorithm for determining the noise
level.
This parameter is only set when NOISE ALGO is set to MANUAL-FIX or MANUAL-CTR.
Interpolation algorithms
Fitting Algorithm
Description
LINER
Linear
interpolation
GAUSS
Normal distribution curve
LORENZ
Lorenz
curve
3RD POLY
3rd polynomial
4TH POLY
4th polynomial
5TH POLY
5th polynomial
Note
If NOISE ALGO is AUTO-FIX or AUTO-CTR, then FITTING ALGO is automatically set to
LINEAR and does not need to be set manually.
NOISE AREA
This parameter is used to set the range of waveform data to be used in determining the
noise level through interpolation.
This parameter is only set when NOISE ALGO is set to MANUAL-FIX.
MASK AREA
This parameter is used to set the range of signal light to be masked when determining
the noise level through interpolation.
This parameter is only set when FITTING ALGO is not set to LINEAR.
NOISE BW
This parameter is used to set the noise bandwidth.
DUAL TRACE
This parameter is used to turn the dual trace function ON/OFF.
When the dual trace function is used, the signal level and noise level during SNR
measurement can each be determined from different traces.
6.7 WDM Transmission Signal Analysis (Except Wavenumber Mode)