WJ Communications SX1115 User Manual Includes multiple antenna location instructions to installer

WJ Communications, Inc. Includes multiple antenna location instructions to installer

Includes multiple antenna location instructions to installer

Page 7 of the WJ Beta Draft 2 instruction manual will be modified as follows:
BETA DRAFT2 - WJ CONFIDENTIAL
Antenna Installation Instructions: FCC RF Exposure Limits
The WJ SX11xx series of UNII transceivers, used in conjunction with 18 - 34 dBi gain antennas, are to be
employed in point -to- point applications only. Antennas used for these transmitters shall be professionally
installed on permanent structures for outdoor operations. The installer is responsible for ensuring that the
systems using high gain directional antennas are used exclusively for fixed, point-to-point operations.
The installer shall mount all transmit antennas so as to comply with the limits for human exposure to radio
frequency (RF) fields per paragraph 1.1307 of the Federal Communications Commission (FCC)
Regulations . The FCC requirements incorporate limits for Maximum Permissible Exposure (MPE) in
terms of electric field strength, magnetic field strength, and power density.
The WJ UNII transmitters are intended to be installed in restricted access areas, where access can only be
gained by service personnel through the use of a special tool, lock and key, or other means of security.
Regardless, antenna installations shall be engineered so that MPE is limited to 1 mW/cm2 , the more
stringent limit for "uncontrolled environments". Table 2 below specifies the minimum distance that must
be maintained between the antenna and any areas where persons may have access, including rooftop
walkways, sidewalks, as well as through windows and other RF-transparent areas behind which persons
may be located.
Table 2 Antenna Radiation Hazard
Antenna P max per Rules MPE distance, cm Regulatory Limit
10 dBi 27.8 dBm 21.9 max power,15.407a3
12 dBi 27.8 dBm 27.5 max power,15.407a3
14 dBi* corner reflector 27.8 dBm 34.7 max power,15.407a3
18.5 dBi* flat panel 27.8 dBm 58.2 max power, 15.407a3
20 dBi 27.8 dBm 69.2 max power,15.407a3
22 dBi* 1ft dish 27.8 dBm 87.1 max power, 15.407a3
24 dBi 26.8 dBm 97.7 max EIRP, 15.407a3
26 dBi* flat panel 24.8 dBm 97.7 max EIRP, 15.407a3
28 dBi 22.8 dBm 97.7 max EIRP, 15.407a3
30 dBi 20.8 dBm 97.7 max EIRP, 15.407a3
32 dBi 18.8 dBm 97.7 max EIRP, 15.407a3
34 dBi* 4ft dish 16.8 dBm 97.7 max EIRP, 15.407a3
*Antennas tested and qualified for FCC certification August - October 1999. Other antenna types may be used,
provided applicable requirements in FCC Rule parts 2 and 15 are met.
Antenna manufacturer-supplied installation instructions for specific models generally contain information
regarding antenna mounting, aiming, lightning protection, and other relevant factors. In addition to
meeting these requirements, the antenna system installer is responsible for installing antennas so that they
comply with FCC RF exposure requirements. The FCC RF exposure requirements at a given location are
based on the sum total of contributions from all radio sources. For WJ system antennas placed in close
proximity to other transmitters (e.g., on a shared rooftop or tower installation), installers shall take steps to
insure that MPE guidelines in 1.1307 of the Rules continue to be met with the inclusion of the contribution
from the new antenna. Further information and guidance can be found in FCC Bulletin OET 65, available
for download at .http://www.fcc.gov/oet/rfsafety/

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