User manual

AP User Manual January 2004
Software Release 4.1
Canopy™ System
Calculator
Automatically calculate
Free Space Path Loss
from known
Distance from Transmitter to Receiver
Frequency
Distance from transmitter to receiver (kilometers)
Distance from transmitter to receiver (miles)
Frequency (GHz)
Free space path loss from metric input (dB)
Free space path loss from English standard input (dB)
Determinants
Results
Enter Values
Read Values
Figure 18: Canopy System Calculator page for path loss
5.2.6 Loss Due to Foliage
The foliage of trees and plants causes additional signal loss. Seasonal density, moisture content of
the foliage, and other factors such as wind may change the amount of loss. Caution should be
exercised when a link is used to transmit though this type of environment.
5.2.7 Carrier-to-Interference Ratio
The C/I (Carrier-to-Interference) ratio defines how much signal advantage must be engineered into
the radio link to tolerate an interfering transmission.
Note: The C/I ratio is typically a design feature of the radio.
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