P is the maximum output
power rating of the
transmitter in watts.
d is the recommended se
paration distance in meter
s.
Field strength from fixed
RF transmitters, as deter
mined by an
electromagnetic site
survey, should be less tha
n the compliance level in
each
frequency range. b
Interference may occur in
the vicinity of equipment
marked with the following
symbol.
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 accurately. If
you wish to use the equipment in the vicinity of fixed RF transmitters and you are uncertain about the
electromagnetic environment, please consider obtaining an electromagnetic site survey. If the measured field
strength in the location where the equipment is being used exceeds the applicable RF compliance level above, it
is the user’s responsibility to verify that the equipment is operating normally. If abnormal performance is observed,
additional measures, such as re-orienting or relocating the equipment, may be necessary.
b Over the frequency range 150 kHz to 80MHz, field strengths should be less than 3 V/m.
TABLE 3: Recommended Separation Distances (IEC 60601-1-2:2007)
This equipment is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. Observing the recommended separation distances between this equipment and other portable and
mobile RF communications equipment (transmitters) can reduce the likelihood of electromagnetic interference.
Rated Maximum
Output Power of
Transmitter (W)
Separation Distance (m) Based on Frequency of Transmitter
150 kHz – 80 MHz
d= 1.2#
80 MHz – 800 MHz
d =1.24P
800 MHz – 2.5GHz
d = 2.3,./P
0.01 0.12 0.12 0.23
0.1 0.37 0.37 0.74
1 1. 1. 2.
10 4. 4. 7.
100 12 12 23
For transmitters rated at a maximum output power not listed above, the recommendation 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
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