Integra Codman CERTAS Plus Mode D'emploi page 18

EN – ENGLISH
a Field strengths from fixed transmitters, such as base stations for radio
(cellular/cordless) telephones and land mobile radios, amateur radio,
AM and FM radio broadcast and TV broadcast cannot be predicted
theoretically with accuracy. To assess the electromagnetic environment
due to fixed RF transmitters, an electromagnetic site survey should be
considered. If the measured field strength in the location in which the
Locator device is used exceeds the applicable RF compliance level above,
the Locator devices should be observed to verify normal operation.
If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or relocating the Tool Kit.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be
less than 3 V/m.
Recommended separation distances between portable and
mobile RF communications equipment and the Tool Kit
Rated
Separation distance according to frequency of transmitter m
maximum
output
power of
150 kHz to 80 MHz
transmitter
W
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the
recommended separation distance d in meters (m) can be estimated using
the equation applicable to the frequency of the transmitter, where P is the
maximum output power rating of the transmitter in watts (W) according to
the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for the higher
frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic
propagation is affected by absorption and reflection from structures,
objects and people.
Table 4
80 MHz to 800 MHz
d = 1.2 √ P
0.12
0.38
1.2
3.8
12
d = 1.2 √ P
0.12
0.38
1.2
3.8
12
18
800 MHz to 2.5 GHz
d = 2.3 √ P
0.23
0.73
2.3
7.3
23