Seagull HL888HA, Руководство пользователя

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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 propagation
is affected by absorption and re fl ection from structures, objects and people.
a). Field strengths from fi 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 fi xed RF
transmitters, an electromagnetic site survey should be considered. If the
measured fi eld strength in the location in which the device is used exceeds
the applicable RF compliance level above, the deivce should be observed
to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the device.
b). Over the frequency range 150 kHz to 80 MHz, fi eld strengths should be less
than 3 V/m.
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 (transmitters) and the deivce 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
150 kHz to 80 MHz
d
= 1,2
P
0,12
0,38
1,2
3,8
12
80 MHz to 800 MHz
d
= 1,2
0,12
0,38
1,2
3,8
12
Separation distance according to frequency of transmitter
m
800 MHz to 2,5 GHz
d
= 2,3
0,23
0,73
2,3
7,3
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