GarrettCom manual Power Budget Calculations for ES42 Series, Fiber Media

ES42 Series Edge Switches Installation and User Guide (05/05)

3.8.5Power Budget Calculations for ES42 Series, Fiber Media

Receiver Sensitivity and Transmitter Power are the parameters necessary to compute the power budget. To calculate the power budget of different fiber media installations using Magnum products, the following equations should be used:

OPB (Optical Power Budget) = PT(min) - PR(min)

where PT = Transmitter Output Power, and PR = Receiver Sensitivity

Worst case OPB = OPB - 1dB(for LED aging) - 1dB(for insertion loss) Worst case distance = {Worst case OPB, in dB} / [Cable Loss, in dB/Km]

where the “Cable Loss” for 62.5/125 and 50/125∝m (m.m.) is 2.8 dB/km, and the “Cable Loss” for 100/140 (Multi-mode) is 3.3 dB/km, and the “Cable Loss” for 9/125 (Single-mode) is 0.5 dB/km

and the “Cable Loss” for 9/125 (Single-mode) is 0.25 dB/km (SSCX)

The following data has been collected from component manufacturer’s (Agilent’s, JDS- Uniphase, stratus, Lucents’) web sites and catalogs to provide guidance to network integrators and installers-

www . GarrettCom. com

53