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Guidance and manufacturer's declaration - electromagnetic immunity
The KOWA FM-600 is intended for use in the electromagnetic environment specified below. The customer or the user of the KOWA FM-
600 should assure that it is used in such an environment.
Immunity test IEC 60601 test level Compliance level Electromagnetic environment - guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 V
3 V/m
Portable and mobile RF communications equipment
should be used no closer to any part of the KOWA FM-
600, including cables, than the recommended separa-
tion distance calculated from the equation applicable to
the frequency of the transmitter.
Recommended separation distance
d=1.2 P
d=1.2 P 80 MHz to 800 MHz
d=2.3 P 800 MHz to 2.5 GHz
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 dis-
tance in meters (m).
Field strengths from fixed RF transmitters, as determined by
an electromagnetic site survey
a
, should be less than the
compliance level in each frequency range
b
.
Interference may occur in the vicinity of equipment
marked with the following symbol:
3 Vrms
150 kHz to 80 MHz
3 V/m
80 MHz to 2.5 GHz
NOTE 1 At 80MHz and 800MHz, 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 KOWA FM-600 is used exceeds the applicable RF compliance level above, the KOWA
FM-600 should be observed to verify normal operation. If abnormal performance is observed, additional measures may be neces-
sary, such as reorienting or relocating the KOWA FM-600.
b Over the frequency range 150kHz to 80MHz, field strengths should be less than 3 V/m.
For transmitters rated at a maximum output power not listed above, the recommended 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 80MHz and 800MHz, 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.
Recommended separation distances between portable and mobile RF communications equipment
and the KOWA FM-600
The KOWA FM-600 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
customer or the user of the KOWA FM-600 can help prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the KOWA FM-600 as recommended below, according to the
maximum output power of the communications equipment.
Rated maximum output power
of transmitter
W
0.01
0.1
1
10
100
Separation distance according to frequency of transmitter
m
800 MHz to 2.5 GHz
d=2.3 P
0.23
0.74
2.3
7.4
23
150 kHz to 80 MHz
D=1.2 P
0.12
0.37
1.2
3.7
12
80 MHz to 800 MHz
d=1.2 P
0.12
0.37
1.2
3.7
12
13.Electromagnetic Compatibility