7
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 HVO-3300MT is used exceeds the applicable
RF compliance level above, the HVO-3300MT should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as reorienting or relocating the HVO-3300MT.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
c The ISM (industrial, scientific and medical) bands between 150 kHz and 80 MHz are 6.765 MHz to 6.795 MHz;
13.553 MHz to 13.567 MHz; 26.957 MHz to 27.283 MHz; and 40.66 MHz to 40.70 MHz.
Recommended separation distances between portable and mobile RF communications equipment
and the HVO-3300MT
The HVO-3300MT is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the HVO-3300MT can help prevent electromagnetic interference by maintaining
a minimum distance between portable and mobile RF communications equipment (transmitters) and the HVO-3300MT
as recommended below, according to the maximum output power of the communications equipment.
Rated maximum output
power of transmitter
W
Separation distance according to frequency of transmitter
m
IEC 60601-1-2 : 2007
IEC 60601-1-2 : 2014
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
150 kHz to
80 MHz
d
= 1.2
√
P
80 MHz to
2.7 GHz
d
= 2.0
√
P
0.01
0.12
0.12
0.23
0.12
0.20
0.1
0.38
0.38
0.73
0.38
0.63
1
1.2
1.2
2.3
1.2
2.0
10
3.8
3.8
7.3
3.8
6.3
100
12
12
23
12
20
For transmitters rated 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:
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.
Содержание HVO-3300MT
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