App-20
IM AQ6376-01EN
Related to SNR Analysis
Parameter
Default
Setting Range Unit
Description
NOISE ALGO
AUTO-FIX
AUTO-FIX
MANUAL-FIX
AUTO-CTR
MANUAL-CTR
PIT
-
Selection of algorithms for noise level
measurement.
NOISE AREA
0.40nm
0.01 to 10.00nm nm
A range of waveform data for use in noise
level analysis is specified as a range
centering on channel wavelengths.
When N_ALGO is:
• AUTO-FIX
"AUTO"
• MANUAL-FIX
**.**
• AUTO-CTR
"Between Ch"
• MANUAL-CTR "Between Ch"
• PIT
"-"
MASK AREA
0.20nm
0.01 to 10.00nm nm
Specify the signal optical spectrum range
to be masked within the waveform data,
while using the channel wavelength as its
center.
When N_ALGO is:
• AUTO-FIX
"-"
• MANUAL-FIX
When F_ALGO is LINEAR: "-"
Other cases:
input of parameter
values
• AUTOL-CTR
"-"
• MANUAL-CTR
When F_ALGO is LINEAR: "-"
Other cases:
input of parameter
values
Limiter is applied during input to ensure
NOISE AREA is MASK AREA or more.
• PIT
"-"
FITTING ALGO
LINEAR
LINEAR
GAUSS
LORENZ
3RD POLY
4TH POLY
5TH POLY
-
Selection of a fitting algorithm for obtaining
noise levels.
NOISE BW
0.10nm
0.01 to 1.00nm
nm Setting of noise bandwidth.
DUAL TRACE
OFF
ON/OFF
-
OFF: Active trace is handled as the target
for analysis.
ON:
Wavelengths and levels are
calculated from TRACE A. Noise
levels are calculated from TRACE B.
Appendix 4 Detailed Explanations of WDM Analysis Function