Electromagnetic Compatibility Product Specifications
9 - 30 046-003777-00 A5/A3™ Operating Instructions
RECOMMENDED SEPARATION DISTANCES BETWEEN PORTABLE AND MOBILE RF
COMMUNICATIONS EQUIPMENT AND THE A5/A3
The A5/A3 is suitable for use in an electromagnetic environment in which radiated RF disturbance are
controlled. The customer or the user of the A5/A3 can help prevent electromagnetic interference by
maintaining a minimum distance between portable/mobile RF communications equipment
(transmitters) and the A5/A3 as recommended below, according to the maximum output power of the
communications equipment.
RATED
MAXIMUM
OUTPUT POWER
OF
TRANSMITTER
(W)
SEPARATION DISTANCE (M) ACCORDING TO FREQUENCY OF TRANSMITTER
150 kHz to
80 MHz
outside ISM
bands
d = 1.2 x
150 kHz to
80 MHz
in ISM bands
d = 1.2 x
80 MHz to
800 MHz
d = 1.2 x
800 MHz to
2.5 GHz
d = 2.3 x
0.01 0.12 0.12 0.12 0.23
0.1 0.38 0.38 0.38 0.73
1 1.20 1.20 1.20 2.30
10 3.80 3.80 3.80 7.30
100 12.00 12.00 12.00 23.00
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d in meters (m) can be determined 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: At 80 MHz to 800 MHz, the separation distance for the higher
frequency range applies.
NOTE: 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.
NOTE: An additional factor of 10/3 is used in calculating the recommended
separation distance for transmitters in the ISM frequency bands
between 150 kHz and 80 MHz and in the frequency range 80 MHz to
2,5 GHz to decrease the likelihood that mobile/portable
communications equipment could cause interference if it is
inadvertently brought into patient areas.
NOTE: These guidelines may not apply in all situations. Electromagnetic
propagation is affected by absorption and reflection from
structures, objects and people.
TABLE 9-38 Recommended separation distances between portable and mobile RF
communications equipment and the A5/A3
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