Filter
Top Products
AT-WA7500 and AT-WA7501 Installation and User’s Guide
61
Allied Telesyn recommends that you use two antennas for each radio to
achieve optimal performance (antenna diversity) of the radios.
Positioning
Antennas for
Dual Radio
Access Points
In addition to the earlier antenna guidelines, if you have a dual radio
access point, you need to also follow these recommendations:
Cable the antennas at least 3.05 m (10 ft) from the access point.
If the access point has two of the same type of radio, position the
antennas for one of the radios at least 3.05 m (10 ft) from the antennas
for the other radio.
If the access point has two radios that are in the same frequency
range, position the antennas for one of the radios at least 3.05 m (10 ft)
from the antennas for the other radio.
Positioning
Antennas for
Antenna
Diversity
Antenna diversity lets you attach two antennas to one radio to increase the
odds of receiving a better signal on either of the antennas. In addition to
the earlier antenna guidelines, if you are connecting two antennas to a
radio, you need to also follow these recommendation:
* The recommendations in this table apply to omni antennas; if you are
using directional antennas, increase the recommended separation
between the antennas.
If you are using antenna diversity, where you place each antenna is critical
because each antenna has a particular function. Antennas placed too
close together may cause interference with each other. Antennas placed
too far apart may not be able to establish two-way communications with
other radios. Note these important points:
Position omni antennas for the 802.11b radio 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.
Table 12. Recommended Antenna Separation for Antenna Diversity
Location Recommended Antenna Separation *
Highly reflective
warehouse environment
0.33 m (13 in) or 0.64 m (25 in)
Moderately reflective
warehouse environment
0.64 m (25 in), 1.22 m (4 ft), or 1.83 m (6
ft)
Open/Office environment 1.22 m (4 ft) to 3.05 m (10 ft)