Exfo IQS-12004B DWDM Passive Component Test System for Manuel d'utilisateur Page 426

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Definitions and Calculation Methods
414 IQS-12004B
Transmission Portion of Notch
The attenuation data is divided into three regions:
³ transmission left (T
left
)
³ transmission right (T
right
)
³ notch
The transmission portion is the total range of T
left
and T
right
.
The wavelengths that segregate these regions are determined in a function
that will find the nominal attenuation for each of the left and right
shoulders. This is a statistical calculation and can be different for the right
and left shoulders.
T
left
T
right
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