21
ENG
The
fi
eld density in the propaga on of radio waves from sta onary radio transmi ers, such as base sta ons of radio telephone networks (cellular / wire-
less), and surface-mobile radios, amateur radio sta ons, AM and FM broadcast transmi ers, television transmi ers can not be determined by calcula on
with su
ffi
cient accuracy. This requires prac cal measurements of
fi
eld density. If the measured values at the loca on of the device exceed the applicable
levels of compliance, the opera on of the device should be monitored to verify their normal func oning. If a devia on from normal func oning is detected
during the observa on process, then it may be necessary to take addi onal measures, such as reorien ng or moving the device.
Field density should be less than 3 V/m out of band from 150 kHz to 80 MHz.
Notes:
1. A greater value of the
fi
eld density is applied at frequencies of 80 and 800 MHz.
2. The expressions are not applicable in all the cases. The propaga on of electromagne c waves is a
ff
ected by absorp on or re
fl
ec on from structures, objects and people.
a)
b)
Table 4
Recommended values for separation distance between portable and mobile radio frequency communication means and the device
The device is intended for use in an electromagnetic environment in which the levels of radiated interference are monitored. The purchaser or the user of the device
can avoid the effects of electromagnetic interference providing a minimum separation distance between portable and mobile radio frequency communication
devices (transmitters) and the device, as recommended below, taking into account the maximum output power of transmission equipment
Nominal maximum power
output of the transmitter,
P, W
Separation distance d, m, depending on the frequency of the transmitter
d = 1,2 P in-band from 150 kHz to 80 MHz
d = 1,2 P in-band from 80 to 800 MHz
d = 2,3 P in-band from 800 MHz to 2.5 GHz
0,01
0,12
0,12
0,23
0,1
0,38
0,38
0,73
1
1,2
1,2
2,3
10
3,8
3,8
7,3
100
12
12
23
Notes:
1. A greater value of the
fi
eld density is applied at frequencies of 80 and 800 MHz.
2. The reduced expressions are applicable in all the cases. The propaga on of electromagne c waves is a
ff
ected by absorp on or re
fl
ec on from structures,
objects and people.
3. At determining recommended values of separa on distance d for transmi ers with nominal maximum power output, which is not men oned in the table,
the nominal maximum output power P in Wa s speci
fi
ed in the transmi er manufacturer’s documenta on is subs tuted into reduced expressions.
