Kowa VX-20, Instruction Manual, Page: 86 / 88

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11 Electromagnetic compatibility (IEC60601-1-2)
Guidance and manufacturer’s declaration - electromagnetic immunity
KOWA VX-20 is intended for use in the electromagnetic environment specified below.
The customer or the user of KOWA VX-20 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
EN 61000-4-6
Radiated RF
IEC 61000-4-3
EN 61000-4-3
3 Vrms
150 kHz to 80 MHz
3 V/m
80 MHz to 2.5 GHz
3 Vrms
3 V/m
Portable and mobile RF communications
instrument should be used no closer to any
part of KOWA VX-20, including cables, than
the recommended separation distance cal-
culated 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 rat-
ing of the transmitter in watts (W) according
to the transmitter manufacturer and d is the
recommended separation distance in metres
(m).
Field strengths from fixed RF transmitters,
as determined by an electromagnetic site
surveya, should be less than the compliance
level in each frequency rangeb.
Interference may occur in the vicinity of in-
strument marked with the following symbol:
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 elec-
tromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field
strength in the location in which KOWA VX-20 is used exceeds the applicable RF compliance level above, KOWA VX-20 should
be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as re-
configuring or relocating KOWA VX-20
b Over the frequency range 150kHz to 80MHz, field strengths should be less than 3 V/m.
Recommended separation distances between
portable and mobile RF communications instrument and KOWA VX-20
KOWA VX-20 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
customer or the user of KOWA VX-20 can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications instrument (transmitters) and KOWA VX-20 as recommended below,
according to the maximum output power of the communications instrument.
Rated maximum output
power of transmitter
W
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
d=1.2 P
80 MHz to 800 MHz
d=1.2 P
800 MHz to 2.5 GHz
d=2.3 P
0.01 0.12 0.12 0.23
0.1 0.37 0.37 0.74
1 1.2 1.2 2.3
10 3.7 3.7 7.4
100 12 12 23
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in metres (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.