Table of Contents
Advertisement
Guidance and manufacturer's declaration; electromagnetic immunity (continued)
The product is intended for use in the electromagnetic environment specified below. The customer or the user of the
product should assure that it is used in such an environment.
Immunity test IEC 60601 test level Compliance level Electromagnetic environment - guidance
Conducted RF 3 Vrms
IEC 61000-4-6
150 kHz to 80 MHz
Radiated RF
3 V/m
IEC 61000-4-3
80 MHz to 2.5 GHz
NOTE 1: At 80 MHz and 800 MHz, 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.
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
considered. If the measured field strength in the location in which the product is used exceeds the applicable RF
compliance level above, the product should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as re-orienting or relocating the product.
b. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended Separation Distances
Recommended separation distances between portable and mobile RF communications equipment and the product
The product is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled.
The customer or the user of the product can help prevent electromagnetic interference by maintaining a minimum
distance between portable and mobile RF communications equipment (transmitters) and the product as recommended
below, according to the maximum output power of the communications equipment.
Rated maximum output
power (W) of transmitter
0.01
0.10
1.00
10.00
100.00
For transmitters rated at a maximum output power not listed above, the recommended separation distance
(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 and
reflection from structures, objects and people.
Portable and mobile RF communications equipment should be
used no closer to any part of the product, including cables, than
the recommended separation distance calculated from the
equation applicable to the frequency of the transmitter.
Recommended separation distance
3 Vrms
d
=
3 V/m
d
=
d
=
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
level in each frequency range
Separation distance, in meters according to frequency of transmitter
150 kHz to 80 MHz
0.12
0.38
1.20
3.80
12.00
1 2 P
,
1 2 P
,
80 MHz to 800 MHz
2 3 P
,
800 MHz to 2,5 GHz
a
should be less than the compliance
b
.
Interference may occur in the vicinity of equipment
marked with this symbol.
80 MHz to 800 MHz
0.12
0.38
1.20
3.80
12.00
Electromagnetic Compatibility Tables | 17
800 MHz to 2.5 GHz
0.23
0.73
2.30
7.30
23.00
d
in meters
Advertisement
Table of Contents
