About Ce; Installation Notes - Icom IC-7200 Instruction Manual

17

ABOUT CE

INSTALLATION NOTES

For amateur base station installations it is recom-
mended that the forward clearance in front of the an-
tenna array is calculated relative to the EIRP (Effec-
tive Isotropic Radiated Power). The clearance height
below the antenna array can be determined in most
cases from the RF power at the antenna input termi-
nals.
As different exposure limits have been recommended
for different frequencies, a relative table shows a
guideline for installation considerations.
Below 30 MHz, the recommended limits are specified
in terms of V/m or A/m fields as they are likely to fall
within the near-field region. Similarly, the antennas
may be physically short in terms of electrical length
and that the installation will require some antenna
matching device which can create local, high intensity
magnetic fields. Analysis of such MF installations is
best considered in association with published guid-
ance notes such as the FCC OET Bulletin 65 Edition
97-01 and its annexes relative to amateur transmitter
installations.
The EC recommended limits are almost identical to
the FCC specified 'uncontrolled' limits and tables 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 ra-
diation 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.
The figures assume the worst case emission of a
constant carrier.
For the bands 10 MHz and higher the following power
density limits have been recommended:
10–50 MHz 2 W/sq m
Vertical clearance by EIRP output
1 Watts
10 Watts
25 Watts
100 Watts
1000 Watts
Forward clearance by EIRP output
100 Watts
1000 Watts
10,000 Watts
100,000 Watts
95
2.1 m
2.8 m
3.4 m
5 m
12 m
2 m
6.5 m
20 m
65 m
In all cases any possible risk depends on the trans-
mitter being activated for long periods. (actual recom-
mendation limits are specified as an average during 6
minutes) Normally the transmitter is not active for long
periods of time. Some radio licenses will require that a
timer circuit automatically cuts off the transmitter after
1–2 minutes etc.
Similarly some modes of transmission, SSB, CW, AM
etc. have a lower 'average' output power and the as-
sessed risk is even lower.
Versions of the IC-7200 which display the
"CE" symbol on the serial number seal,
comply with the essential requirements of
the European Radio and Telecommunica-
tion Terminal Directive 1999/5/EC.
This warning symbol indicates that this
equipment operates in non-harmonised
frequency bands and/or may be subject to
licensing conditions in the country of use.
Be sure to check that you have the correct
version of this radio or the correct pro-
gramming of this radio, to comply with na-
tional licensing requirement.
• List of Country codes (ISO 3166-1)
Country Codes
1 Austria AT
2 Belgium BE
3 Bulgaria BG
4 Croatia HR
5 Czech Republic CZ
6 Cyprus CY
7 Denmark DK
8 Estonia EE
9 Finland FI
10 France FR
11 Germany DE
12 Greece GR
13 Hungary HU
14 Iceland IS
15 Ireland IE
16 Italy IT
17 Latvia LV
Country Codes
18 Liechtenstein LI
19 Lithuania LT
20 Luxembourg LU
21 Malta MT
22 Netherlands NL
23 Norway NO
24 Poland PL
25 Portugal PT
26 Romania RO
27 Slovakia SK
28 Slovenia SI
29 Spain ES
30 Sweden SE
31 Switzerland CH
32 Turkey TR
33 United Kingdom GB