Cabletron Systems 9033073 manual Link speed versus Range, Determine Line-of-SightClearance

Calculating Range & Clearance

The Dynamic Range Budget

Link speed versus Range

NOTE

For the values referenced in Table D-2 on page D-4, each 7-dBi antenna is connected to the RoamAbout PC Card with a black-background label.

For the values referenced in Table D-2, each 14-dBi antenna is connected to the RoamAbout PC Card with a white-background label.

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The values printed in italics use a black-background RoamAbout PC Card at each end of the wireless link.

All other values use a white-background RoamAbout PC Card at one or both ends of the antenna link.

The listed Dynamic Range Budget values include the loss of the mandatory RoamAbout Lightning Protector.

Communications at lower data speeds may travel longer distances. In situations where range is more critical to your network than data speed, you may wish to limit the data speed to 1Mbit/s to increase the range of your wireless point-to-point link.

We have included the Dynamic Range Budgets for both 2 Mbit/s and 1 Mbit/s links with each table to help you determine which data speed is appropriate for your situation.

Determine Line-of-Sight Clearance

Use Table D-3 on page D-6 to determine the minimum clearance of the signal path clearance required to achieve the maximum possible range with the type of antennas and cable lengths you selected.

Outdoor Antenna Installation Guide D-5