Anritsu MS9740B - Measuring WDM (Wavelength Division Multiplexed) Signals

5.5 Measuring WDM (Wavelength Division Multiplexed) Signals
5-17
5
Measurement Functions
5.5 Measuring WDM (Wavelength Division Multiplexed)
Signals
Wavelength Division Multiplexing (WDM) is a method for increasing the
communication capacity of an optical fiber by using multiple wavelengths
in one fiber. The WDM light is composed of multiple optical signals. At
WDM measurement, the following items are measured simultaneously for
the multiple optical signals.
Table 5.5-1 WDM Measurement Items
Measurement Item Screen Display Description
Signal
Gain Vari
Level difference maximum and
minimum signal levels
Level (dBm)
Level
Lvl-Ref (dB)
Ratio of level difference to
reference signal
No
Number of signal (sequential
number added from short
wavelength)
Peak Count
Signal count
Signal Wl (nm)
/Wl (nm)
Wavelength
Spacing Frq
(GHz)
Frequency difference between
signals
Spacing (nm)
Spacing Wl (nm)
Wavelength difference between
signals
Wl-Ref (nm)
Ratio of wavelength difference to
reference signal
SNR
SNR
Signal Noise Ratio
SNR (/*.*nm)
Signal noise ratio for the noise
level per noise BW
Noise
L/R or Blank
SNR Noise detection direction
(L = left, R = right A = mean.)
No display when Noise Detection
Type set to Area