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L E C T R O M A G N E T I C
Frequency Separation Distances
Note:
This equipment is intended for use in an electromagnetic
environment in which radiated RF disturbances are controlled.
The customer or user of this equipment can help prevent
electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment
(transmitters) and this equipment. Minimum distances, according
to the maximum output power of the communications
equipment, are listed in the table below.
Recommended Separation Distances Between Portable and Mobile RF Communications
Equipment and the Monitor (Always evaluate electronic equipment on site before use)
Immunity Test
IEC 60601
Test Level
Compliance
Level
Electromagnetic Environment
Conducted RF
IEC 61000-4-6
150 kHz to
80 MHz
3 V r.m.s.
N/A
Portable and mobile RF communications equipment
should be used no closer to any part of the monitoring
device, including cables, than the recommended
separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance:
Where
P
is the maximum output power rating of the
transmitter in watts (W), according to the transmitter
manufacturer, and
d
is the recommended separation
distance in meters (m).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site survey,* should
be less than the compliance level in each frequency
range.**
Interference may occur in the vicinity of
equipment marked with the following symbol.
IEC 60417-5140: Non-ionizing electromagnetic
radiation
Radiated RF
IEC 61000-4-3
80 MHz to
2.5 GHz
3 V/m
80 MHz to
2.5 GHz
3 V/m
1 kHz sine
80% AM
80 MHz to
2.5 GHz
3 V/m
2 Hz sine
80% AM
* 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 monitoring device
are used exceeds the applicable RF compliance level above, the monitoring device should be observed to
verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the monitoring device.
** Over the frequency range of 150 kHz to 80 MHz, field strengths should be less than [ V
1
] V/m.
d =
[
3.5
V
1
]
P
150 kHz to 80 MHz
d =
[
3.5
E
1
]
P
80 MHz to 800 MHz
d =
[
7
E
1
]
P
800 MHz to 2.5 GHz