User manual

AP User Manual January 2004
Software Release 4.1
Tx
power
T
x antenna
loss
Tx
cable
loss
Rx antenna
gain
Rx
cable
loss
Rx
signal
level
Transmitter
or Amplifier
receiver
or amplifier
distance
free space signal
transmitter
or amplifier
Figure 17: Determinants in Rx signal level
Rx signal level is calculated as follows:
Rx signal level dB =
Tx power − Tx cable loss + Tx antenna gain − free space path loss
+
Rx antenna gain − Rx cable loss
NOTE: This Rx signal level calculation presumes that a clear line of sight is established
between the transmitter and receiver and that no objects encroach in the Fresnel zone.
The Canopy System Calculator page
PathLossCalcPage.xls automatically calculates free space
path loss. Figure 18 displays an image of this page.
Issue 5 Page 46 of 102