31
EN
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 accu-
racy. 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 device is used exceeds the applicable
RF compliance level above, the device should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or relocating the device.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less
than 3V/m.
Table 4
Recommended separation distances between portable and mobile RF
communications equipment and the device.
The device is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the de-
vice can help prevent electromagnetic interference by maintaining a minimum
distance between portable and mobile RF communications equipment (trans-
mittters) and the device 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)
150 kHz to 80
MHz
d = 3.5
P
80 MHz to 800
MHz
d = 1.2
P
800 MHz to
2.7 GHz
d = 2.3
P
0.01
0.12
0.12
0.23
0.1
0.37
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
