User guide

RLX-IH ♦ 802.11b Reference
Industrial Hotspot
Page 84 of 99 ProSoft Technology, Inc.
April 10, 2007
NOTE: In Mexico, the user is responsible for ensuring that the selected
frequency channels comply with Mexican regulatory standards. At the time of
this printing, only channels 9 through 11 can be used outdoors (1 through 8
cannot); however, channels 1 through 11 can all be used indoors.
Approved antennas with power amp
When the radio is used in conjunction with the amplifier, the antennas are limited
to antennas listed in the following table:
Type Pattern Gain Connector Size (cm)
Min. distance from
Body
1/2 Wave Omni 2 dB SMA-RP 7H x 1.5 20 cm
1/2 Wave art. Omni 2 dB SMA-RP 10H x 1.0 20 cm
Collinear Array Omni 3 dB SMA-RP 6H x 3.0 20 cm
Collinear Array, art. Omni 5 dB SMA-RP 19H x 1.0 20 cm
Collinear Array Omni 5 dB SMA-RP 19H x 1.0 20 cm
Collinear Array Omni 8 dB N-RP 43H x 1.6 20 cm
Collinear Array Omni 9 dB N-RP 43H x 1.6 20 cm
Collinear Array* Omni 12 dB N-RP 106H x 4.0 25 cm
Patch Directional 8 dB SMA-RP 15.0H x 15.0 20 cm
Patch* Directional 11 dB SMA-RP 22H x 12.7 20 cm
Patch* Directional 13 dB N-RP 22H x 22 28 cm
Yagi* Directional 14 dB N-RP 81L x 9.0 28 cm
* Only allowed in a point-to-point network.
6.4.6 Antenna location, spacing, and mounting
Consider the following points regarding antenna location, spacing, and mounting:
 When placing antennas, ensure a clear line of sight between the master
radio's antenna and all of the other radio antennas, if at all possible.
 If the site base contains obstructing terrain or structures, mount the antenna
on a tower or rooftop to provide a line-of-sight path. The line-of-sight
consideration becomes more important as the transmission path becomes
longer. It is most important as the transmission path approaches the 20-mile
maximum.
 Mount the antennas as high off the ground as is practical. The higher an
antenna is above the ground, the greater its range.
 Mount the antennas away from massive structures. Radio signals bounce off
metal walls, for example, which can compromise a clear signal.
 Mount antennas to minimize the amount of nearby metal structures in the
antenna pattern.
 Mount the antennas and install radios away from sources of RF interference.
 Use the shortest possible antenna cable length. Signals lose power over the
cable's distance.
 Choose antennas that are appropriate for the network's intended function.