EXFO IQS-12004B DWDM Passive Component Test System for IQS-500 - Manual (Page 425)

Definitions and Calculation Methods
DWDM Passive Component Test System 413
Notch Filters
.
Notch Filters
Central Wavelength X-dB center of the notch (X is the BW1 dB level) (see Central
Wavelength (nm) on page 410).
When PDL is available, this is calculated using the average
attenuation.
Difference The difference between the defined center and the measured
central wavelength.
IL Maximum attenuation value in the transmission portion (see
Transmission Portion of Notch on page 414).
When PDL is available, this is calculated using the average
attenuation.
PDL (BW1 Range) Max PDL over the range defined by BW1.
PDL (CW)
PDL at operating wavelength (measured center for Generic).
PDL (CW ±x nm) Max PDL over the range.
PDL (x to y nm)
Max PDL over the range.
BW1, BW2, BW3 At dB level from maximum attenuation (see Bandwidth (nm) on
page 408).
When PDL is available, this is calculated using the average
attenuation.
Flatness Delta attenuation across complete transmission portion (see
Flatness/Ripple (dB) on page 411).
When PDL is available, this is calculated using the average
attenuation.
ORL ORL value at central wavelength.
Rejection Maximum attenuation in the notch region.