iHerz iCare - Page 28

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NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propa-
gation is a󰀨ected by absorption and reection 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
broadcast and TV broadcast cannot be predicted theoretically with accuracy. To
assess the electromagnetic environment due to xed RF transmitters, an electro-
magnetic 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 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 radi-
ated 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.
Rated maxi-
mum output
power of trans-
mitter (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
For transmitters rated at a maximum output power not listed above, the recom-
mended 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 pow-
er 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 fre-
quency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propa-
gation is a󰀨ected by absorption and reection from structures, objects and people.