Determining Range & Clearance
The Fresnel Zone
As shown in Figure
•
•
The distance between the antennas (1)
The minimum clearance required for optimal performance (2).
Figure 3-1 Fresnel Zone
Refer to the following table to determine the minimum clearance required for your installation as defined by the distance between the antennas. For more information, refer to Appendix D - Calculating Range & Clearance.
Distance Between Antennas (1) | Minimum Clearance Required (2) | ||
|
|
|
|
kilometers | (miles) | meters | (feet) |
|
|
|
|
2.1 | (1.3) | 5.8 | (19.1) |
|
|
|
|
3.5 | (2.2) | 7.8 | (25.7) |
|
|
|
|
6.5 | (4.0) | 11.1 | (36.5) |
|
|
|
|
9.6 | (6.0) | 14.4 | (47.4) |
|
|
|
|
Outdoor Antenna Installation Guide |