a. Field strengths from fixed transmitters, such as base stations for radio (cellu-
lar/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 elec-
tromagnetic 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 reori-
enting or relocating the device.
b. Over the frequency range 150 kHz to 80 MHz, field strengths should be less
than 3 V/m.
Recommended separation distances between portable and mobile RF commu-
nications equipment and the device – for device that is not LIFE SUPPORTING
Recommended separation distances between portable and mobile RF communica-
tions 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 (transmitters) and the device 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 recom-
mended 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 manu-
facturer.
EN
Separation distance according to frequency of transmitter (m)
150 kHz to 80 MHz
80 MHz to 800 MHz
d = 1,2
d = 1,2
0,12
0,12
0,38
0,38
1,2
1,2
3,8
3,8
12
12
800 MHz to 2,5
GHz
d = 2,3
0,23
0,73
2,3
7,3
23
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