6-25
IM AQ6376-01EN
Analysis
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App
Index
MASK AREA
This parameter is used to set the range of signal light to be masked when determining
the ASE level through interpolation.
This parameter is only set when “FITTING ALGO” is not set to LINEAR.
POINT DISPLAY
This parameter is used to display the range of data used in interpolation for determining
the noise level.
Data used for fitting (blue)
Fitting curve (red)
MASK AREA
ASE AREA (between X - X)
ASE measurement point
NF computation related parameters
RES BW
Set the method for calculating the measurement resolution RBi of each channel used in
computing the NF value.
The default is MEASURED.
If the measuring resolution varies greatly from channel to channel, or in other such
cases, set to CAL DATA.
• MEASURED: Determine the value of the THRESH 3dB width for each channel
from the TRACE B waveform and set to RBi.
• CAL DATA: Set the actual resolution value stored in the instrument to RBi.
SHOT NOISE
Sets whether the Shot Noise component is included in computation of the NF value.
The default is ON.
• ON: Shot Noise component included in computation of the NF value.
• OFF: Shot Noise component not included in computation of the NF value.
6.8 Optical Amp Gain and NF Measurement (Except Wavenumber Mode)