Technical Details
27
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 broad-
cast cannot be predicted theoretically with accuracy. To assess the electromagnetic environ-
ment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the
measured field strength in the location in which the device is used exceeds the applicable RF
compliance level above, the device should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-orienting or relo-
cating the device.
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 pa-on Parometer IEC 60601-2
The device is intended for use in an electromagnetic environment in which radiated RF disturb-
ances are controlled. The customer or the user of the device can help prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communica-
tions equipment (transmitters) and the pa-on Parometer as recommended below, according to
the maximum output power of the communications equipment.
Rated maximum
output power of
transmitter
W
Separation distance according to frequency of transmitter m
150 kHz to 80 MHz in
ISM bands
80 MHz bis
800 MHz
800 MHz to 2,5 GHz
d = 1,17 √P
d= 1,17 √P
d= 2,3 √P
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
For transmitters rated at a maximum output power not listed above, the separation distance can
be estimated using the equation in the corresponding column, 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 ap-
plies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affect-
ed by absorption and reflection from structures, objects, and people.
