27
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reection from structures, objects and people.
a Field strengths from xed transmitters, such as base stations for radio (cellular / cordless)
telephones and land mobile radios, amateur radio, AM and FM radio broad-cast and TV
broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic
environment due to xed RF
transmitters, an electromagnetic site survey should be considered. If the measured eld
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, eld strengths should be less than 3V/m.
Table 6 Recommended separation distances between portable and mobile RF communications
equipment and the ME EQUIPMENT or ME SYSTEM – for ME EQUIPMENT and ME SYSTEMS
that are not LIFE-SUPPORTING
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 device can help prevent
electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmittters) and the device as recommended
below, according to the maximum output power of the communications equipment.
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in metres (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 80MHz and 800MHz, 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 reection from structures, objects and people.
Separation distance according to frequency of transmitter (m)Rated maximum output
power of transmitter
(W)
150 kHz to 80 MHz
0.01 0.117 0.117
0.233
1
10
100
0.1
80 MHz to 800 MHz 800 MHz to 2.5 GHz
0.369 0.369
0.739
1.167
1.167
2.333
3.690
3.690
7.378
11.67
11.67
23.33
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