BpTRU BPM100, Руководство пользователя, Страница: 75 / 93

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a. Field strengths from fixed transmitters, such as base stations or 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 enviro-
nment due to fixed RF transmitters, an electromagnetic site survey
should be considered. If the measured field strength in the location in
which the BpTRU monitor is used exceeds the applicable RF compli-
ance level above, the BpTRU monitor should be observed to verify
normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the
BpTRU monitor.
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 communications
equipment and the BpTRU monitor
The BpTRU monitor is intended for use in an electromagnetic environment is which
radiated RF disturbances are controlled. The customer or user of the BpTRU monitor
can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and the
BpTRU monitor as recommended below, according to the maximum output power of
the communications equipment.
Rated maximum
output power of
transmitter
(W)
Separation distance according to
frequency of transmitter
(m)
150 kHz to
80 MHz
d 1.2 P =
80 MHz to
800 MHz
d 1.2 P =
800 MHz to
2.5 GHz
d 2.3 P =
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 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 80 MHz and 800 MHz, separation distance for the higher frequency applies.
Note 2 These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.