TREND NETWORKS FiberTEK IV Guía De Referencia Rápida página 18

LOSS BUDGET CALCULATOR
Manual budget
Budgets can be manually set when the allowable loss of the cabling is
EN
known. A common use for manual loss budgets is when a network designer
supplies the maximum allowed loss to the installer or when the active
equipment to be operated on the cabling has a known loss budget.
Budget Calculator
Budget Calculator allows the loss budget to be
calculated based on the components of the link
under test.
Enter the attenuation coefficient of the fibre
cable, the number of adapters and splices plus the
attenuation of each and the system will calculate
the loss limit based on the length of cable for each
test.
For example, if the entered parameters are
Fibre attenuation coefficient = 3dB/km
3 connections at 0.75db each
2 splices at 0.3db each
For a 2km cable the loss limit is 8.85dB.
2km of fibre x 3dB = 6dB
3 connections x 0.75dB = 2.25dB
2 splices x 0.3dB = 0.6dB
The calculator settings allow single or dual
wavelength measurements to meet testing
requirements.
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