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 reorienting or relocating the device.
d 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 communications equipment and this device
This device is intended for use in an electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of this device can help prevent electromagnetic interference
by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and this
device 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
P
d
2
.
1
=
80 MHz to 800 MHz
P
d
2
.
1
=
800 MHz to 2,5 GHz
P
d
3
.
2
=
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 reflection from structures, objects, and people.
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