EXFO IQS-12004B DWDM Passive Component Test System for IQS-500 - Manual (Page 424)

Definitions and Calculation Methods
412 IQS-12004B
Channel Crosstalk (dB)
The software calculates the worst-case crosstalk, which is the smallest
difference in IL between two intervals on the main channel curve (BW1
main
and BW1
interf
).
³
IL
max
is the highest loss on the main channel curve in the BW1
main
interval.
³
IL
min
is the lowest loss on the main channel curve in the BW1
interf
interval.
Note: Measurements are taken between all bandpass channels, not only
adjacent channels.
Interfering
channel
Main
channel
IL
max
(dB)
IL
min
(dB)
BW1
main
BW1
interf
Crosstalk (dB) from
interfering channel