Measuring Signal Performance
Tsunami
®
MultiPoint 10200 Series - Antenna Installation Guide
26
:
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
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
Tsunami
®
MultiPoint 10200 Series
-
Hardware Installation Guide
.
The figure below illustrates the calculation of range through Proxim Link (MP 10xxx) Calculator, available at
http://support.proxim.com
, that dynamically adapts the transmit power and receive sensitivity values for a selected product to
follow the local EIRP rule. Click
Path Profile
tab of the Link calculator to get the path profile information with link elevation.
Figure 2-5 Proxim Link Calculator
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
