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Electromagnetic Compatibility
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 consid-
ered. 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 opera-
tion. If abnormal performance is observed, additional measures may be necessary, such as re-
orienting or relocating 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 dis-
turbances are controlled. The customer or the user of the device can help prevent electro-
magnetic interference by maintaining a minimum distance between portable and mobile RF
communications 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 bis 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
applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects, and people.
26


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