Installation and Operating Manual

User Manual
040003A010 Rev A Page 23 of 25
a. The antenna should be mounted outside the site building on a roof, tower, or other
support structure such that its location is inaccessible to personnel within the
Minimum Permissible Exposure radius (see below).
b. The licensee must undertake the responsibility to manage the site in accordance
with the applicable regulatory requirements. This may include, but is not limited
to, providing advisory notices to all personnel who may be exposed to RF energy
in the vicinity of the antenna, restricting access to areas adjacent to the antenna,
or ceasing use of the power amplifier when RF energy exposure safety cannot be
guaranteed.
2. When the power amplifier is operating, a front panel LED will be illuminated. The power
amplifier will be generating measurable RF energy exposure when transmitting.
3. The maximum permissible exposure (MPE) radius is unique to each base site installation
and is based on several factors such as the transmitter power output level, antenna gain,
feed line loss, etc. It is the responsibility of the licensee to determine the MPE for the base
site installation.
a. For frequencies of operation between 300 and 1500MHz, the maximum exposure
limit is f/1500 mw/cm
2
, where f = frequency in MHz
b. An example calculation of the MPE radius for a 250 Watt 406 MHz transmitter
installation having a 5 dBi gain antenna and 1dB of feedline loss is provided below:
14.1feet
12
inches
feet
169.2inches
2.54
R
inches
compliancefor required (cm) distance 429.7R
S4π
Gn)(Po
R
(numeric)gain 2.512Gn
10Gn
CL-G1G
losscoax dB 1.0 CL
1.1310 CFR 47 See dBi 5G1
cm
mW
0.27067
1500
f
S dBiin gain 2.15 dBd G1
dBdin gain antenna 2.85 dBd
MHz 406 f mWatts 250000 Po
10
G
2
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