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Calculating Range & Clearance
The Dynamic Range Budget
D-8 Outdoor Antenna Installation Guide
Determine Typical Range 4
After looking at the minimum clearance requirements in Table D-3
on 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.