marsden M-620 User Manual page 14

Radiated RF
IEC 61000-4-3
NOTE1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE2 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 scale is used exceeds
the application RF compliance level above, the scale should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be necessary,
such as re-orienting or relocating the scale.
B) Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distance between portable and mobile RF communications equipment and the M-610/M-620.
This scale is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
customer or the user of the scale can help prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the scale 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
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 rating of the
transmitter in watts (w) according to the transmitter manufacturer.
NOTE1) At 80 MHz and 800 MHz, the separation distance for the high frequency range applies.
NOTE2) These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection
from structures, objects and people.
3 V/m 80 MHz to 2,5 GHz
Separation distance according to frequency of transmitter m
150 kHz to 80 MHz
d = 1,2√P
0.12
0.38
1.2
3.8
12
Recommended separation distance:
d = 1,2 √P
d = 1,2 √P 80MHz to 800 MHz
d = 2,3 √P 800MHz 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 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
3 V/m equipment marked with the following
symbol:
80 MHz to 800 MHz
d = 1,2√P
800 MHz to 2,5
d = 2,3√P
0.12
0.38
1.2
3.8
12
GHz
0.23
0.73
2.3
7.3
23
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