Allied Telesis AT-WA7501 - Manual (Page 63)

AT-WA7500 and AT-WA7501 Installation and User’s Guide
63
To achieve optimum placement for the two antennas, you must place the
transmit/receive antenna so that it is within range of all the radios that the
receive-only antenna can hear. Note these important points:
ˆ Use external antennas to achieve the recommended antenna
separation for placement of either omni or directional antennas.
ˆ Position omni antennas for the 802.11b radio at least 0.61 m (2 ft)
apart.
ˆ Position directional antennas so they point in the same direction.
ˆ Position the antennas so that both antennas are within range of the
radios they need to communicate with.
ˆ Do not position the two antennas around a corner or so that a wall is
between them.
ˆ Follow the recommended antenna separation precisely when using the
closest distances. Movement of as little as 3.05 cm (1.2 in) may
strongly affect performance. You should choose the greatest distance
possible within the constraints of your environment.
Antenna Diversity for 802.11a
The 802.11a radio diversity operation is enabled by the AP Configuration
Menu. When antenna diversity is enabled, the second port can both
transmit and receive. This feature can be used to provide redundant
coverage of the same area covered by the primary antenna or can be
configured to cover a separate area. This allows directional antennas to be
pointed toward different areas or for the second antenna to be placed on
the other side of the wall.