Installation Instruction

Antenna Installation Instructions: FCC RF Exposure Limits
The WJ SX1115 U-NII transceiver, used in conjunction with 18 - 40
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 U-NII transceivers 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/cm
2
, 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 Gain Power 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 reflec
t
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
40 dBi 8ft dish 7.8 dBm 150 TCB exclusion
*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.