Motorola Canopy Backhaul Module Betriebsanweisung PDF herunterladen (Seite 19)

45 Mbps Backhaul User Guide

Issue 3, December 2004 Page 18 of 113

4.1.3 Path Loss Considerations

The path loss is the amount of attenuation the radio signal undergoes between the two ends of the link. The path

loss is the sum of the attenuation of the path if there were no obstacles in the way (Free Space Path Loss), the

attenuation caused by obstacles (Excess Path Loss) and a margin to allow for possible fading of the radio signal

(Fade Margin).

capabilityseasonfadeexcessspacefree

LLLLL <+++

Where

spacefree

Free Space Path Loss (dB)

excess

Excess Path Loss (dB)

fade

Fade Margin Required (dB)

seasonal

Seasonal Fading (dB)

capability

Equipment Capability (dB)

Equation 1 Path Loss

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Motorola Canopy Backhaul Module Betriebsanweisung Seite 19