About Ce - Icom IC-7300 Basic Manual

INSTALLATION NOTES
For amateur base station installations it is recommended
that the forward clearance in front of the antenna array is
calculated relative to the EIRP (Effective Isotropic Radiated
Power). The clearance height below the antenna array can
be determined in most cases from the RF power at the
antenna input terminals.
As different exposure limits have been recommended for
different frequencies, a relative table shows a guideline for
installation considerations.
short in terms of electrical length and that the installation will
require some antenna matching device which can create
installations is best considered in association with published
guidance notes such as the FCC OET Bulletin 65 Edition
7-01 and its annexes relative to amateur transmitter
installations. The EC recommended limits are almost
exist that show pre-calculated safe distances for different
antenna types for different frequency bands. Further
information can be found at http www.arrl.org .
• Typical amateur radio installation
Exposure distance assumes that the predominant radiation
pattern is forward and that radiation vertically downwards
is at unity gain (sidelobe suppression is equal to main lobe
gain). This is true of almost every gain antenna today.
Exposed persons are assumed to be beneath the antenna
array and have a typical height of 1.8 m.
carrier.
For the bands 10 MH and higher the following power
density limits have been recommended
10 50 MH 2 W sq m
Vertical clearance by EIRP output
1 Watts 2.1 m
10 Watts 2.8 m
25 Watts 3.4 m
100 Watts 5 m
1000 Watts 12 m
For ard clearance by EIRP output
100 Watts 2 m
1000 Watts 6.5 m
10,000 Watts 20 m
100,000 Watts 65 m
In all cases any possible risk depends on the transmitter
being activated for long periods. (actual recommendation
Normally the transmitter is not active for long periods of
time. Some radio licenses will require that a timer circuit
automatically cuts the transmitter after 1 2 minutes etc.
Similarly some types of emission, i.e., SSB, CW, AM etc.
is even lower.
• List of Country codes (ISO 3166-1)
Country Codes

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