Intermec WA21 System Manual page 61

MobileLAN access WA2X System Manual
Note these important points:
• Position omni antennas for the radios at least 0.61 m (2 ft) apart.
• Position directional antennas so they point in the same direction.
• Position the antennas so that both antennas are within range of the
radios they need to communicate with.
• Do not position the two antennas around a corner or so that a wall is
between them.
• 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.
Instead of physical separating omni antennas, you can mount them along a
single axis to minimize the antenna-to-antenna coupling.
Access Point
Using Stacked Antenna Positioning for Omni Antennas:
Note that antenna diversity works differently for 802.11g, 802.11b, and
802.11a radios.
Chapter 2 — Installing the Access Points
Primary antenna
for Radio 1
Secondary antenna
for Radio 1
All four antennas
are mounted along
a single axis.
Secondary antenna
for Radio 2
Primary antenna
for Radio 2
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