Measuring Signal Performance
Edge
TM
Multipoint and Quickbridge - Hardware Installation Guide 64
: The Distance (m) is calculated by assuming the 60% of the 1st Fresnal to be clear.
Effective Isotropic Radiated Power (EIRP)
In countries like USA and Canada, radio can be installed with any directional antennas gain, as there is no Effective Isotropic
Radiated Power (EIRP) limit for the application of these systems for fixed point-to-point applications in the 5.8 GHz frequency
band. In other bands and in other countries, EIRP limits may apply. In the case of EIRP limits, use the lower values of either
(P
out
- L
1
+ G
1
) or the EIRP limit, within the Link Budget equation. You should check this calculation in both the directions to
assure legal application. An EIRP limit is the maximum RF energy that can be transmitted as measured at the transmitting
antenna and is usually deterwmined by government regulations. For details, we recommend you to refer the Max EIRP values
listed under the Wireless Interface properties, in the Edge
TM
- Hardware Installation Guide.
The figure below shows the Proxim Link Calculator, available at http://support.proxim.com. Refer to Link Calculator - User
Guide to understand:
• How to install the Link calculator
• How to use the Link Calculator
Figure 9-5 Proxim Link Calculator
82 54 0.8 112 1697 4.8 142 53.7 26.8
83 60 0.9 113 1904 5.0 143 60.2 28.4
84 68 1.0 114 2136 5.3 144 67.6 30.1
85 76 1.0 115 2397 5.7 145 75.8 31.9
86 85 1.1 116 2689 6.0 146 85.0 33.7
87 95 1.1 117 3018 6.4 147 95.4 35.7
88 107 1.2 118 3386 6.7 148 107.1 37.9
89 120 1.3 119 3799 7.1 149 120.1 40.1
90 135 1.3 120 4263 7.6 150 134.8 42.5
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