Calculating Range & Clearance
The Dynamic Range Budget
Determine Typical Range
After looking at the minimum clearance requirements in Table D-3on page D-6, you may realize that local regulations, local building codes, or other restrictions could prohibit the installation of an antenna which meets the desired criteria.
In these situations, it may not be possible to achieve full line-of- sight clearance. However, this may not be required since the distance that your wireless outdoor installation needs to cover is less than the maximum range listed in Table D-3.
Table D-4 on page D-9 will help you determine how to meet the requirements in these situations. This table identifies typical ranges that can be achieved in conditions where the minimum clearance requirements may only be partially met.
To read Table D-4 correctly:
Use the Dynamic Range Budget value that you read from either Table D-1 or Table D-2.
Select the Line-of-Sight clearance available at your site. The value you select should be based on the same principles listed in the Note on page D-7.
Read the shaded columns in Table D-4 to determine minimum clearance as required for the maximum range identified in Table D-3.
—Values marked with an asterisk (*) in Table D-4 correspond to Dynamic Range Budgets for 1-Mbit/s link-speed connections.
—All other values correspond to Dynamic Range Budgets for 2-Mbit/s link-speed connections.
—Values in Bold apply only to FCC regulated countries.
D-8 | Outdoor Antenna Installation Guide |
