User's Manual

User Manual
Page 7 of 8
2) 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.
• When the power amplifier is operating, a front panel LED will be illuminated. The power
amplifier will be generating measureable RF energy exposure when transmitting.
• 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.
1) For operation below 300 MHz, the maximum exposure limit is 0.2 mw/cm
2
.
2) An example calculation of the MPE radius for a 350 Watt VHF transmitter installation
having a 5 dBi gain antenna and 1dB of feedline loss is provided below:
19.4feet
12
inches
feet
232.9inches
2.54
R
inches
compliancefor required (cm) distance 591.5R
S4π
Gn)(Po
R
(numeric)gain 2.512Gn
10Gn
(dB)gain antenna effective CL-G1G
losscoax dB 1.0 CL
dBi 5G1
cm
mW
0.2 S dBiin gain 2.15 dBd G1
dBdin gain antenna 2.85 dBd
MHz 174-150 f mWatts 350000 Po
10
G
2
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