Anritsu MS9740B - Measuring WDM Filter

Chapter 5 Measurement Functions
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5.9 Measuring WDM Filter
The WDM filter is an optical filter that passes light having a wavelength
defined in ITU-T. The WDM filter function is used to measure the
following items:
● CH Wl (nm): Reference wavelength of signal*
1
● Spacing (nm): Wavelength difference between signals
● PK Wl (nm): Peak wavelength of signal
● CH Lvl (dB): Filter loss at the reference wavelength of each
signal*
2
● CH Lvl (dBm): Signal level at the reference wavelength*
3
●
x dB BW (nm): Signal bandwidth at a level difference of x dB*
4
● PK Lvl (dB): Minimum filter loss in signal*
2
● PK Lvl (dBm): Peak signal level*
3
● Ripple (dB): Difference between maximum and minimum
levels in the specified wavelength range
●
n dB Wl (nm): Signal wavelength using n dB Threshold method
● Total Power (dBm): Integrated power of displayed waveform*
3
● Peak Count: Signal count
*1: The wavelength detected by the method selected at Channel –
Detection Type in Figure 5.9.3-1 is displayed.
*2: This item is measured only when the active trace type is
“Calculate”.
*3: This item is measured only when the active trace type is other than
“Calculate”.
*4: The bandwidth detected by the method selected at Analysis Type
in Figure 5.9.3-1 is displayed.