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each frequency range." Interference may occur
in the vicinity of equipment marked with the
following symbol:
NOTE 1: At 80 MHz 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.
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 access the electromagnetic environment due to fixed RF transmitters, and electromagnetic site
survey should be considered. If the measured filed strength in the location in which the EQUIPMENT is used
exceeds the applicable RF compliance level above, the EQUIPMENT should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be necessary, such as re-orienting or
relocationing the EQUIPMENT.
Over the frequency range 150kHz to 80MHz, field strengths should be less than 3 V/m.
1.3.3 Recommended Minimum Distance Between Device and Mobile RF Equipment
The equipment is intended for use in an electromagnetic environment in which radiated RF disturbance
are controlled. The customer or the user of the equipment can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters)
and the equipment as recommended below, according to the maximum output power of the communications
equipment.
Separation distance according to frequency of transmitter
(m)
Rated Maximum
Output Power
of
Transmitter
(W)
150 kHz to 80 MHz
80 MHz to 800 MHz
800 MHz to 2.5 GHz
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
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: 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 re
fl
ection from structures, objects and people.