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39
a
Field strengths from fixed 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 fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which the
SBM 42 is used exceeds the applicable RF compliance level above, the SBM 42 should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-orienting or relocating the SBM 42.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Table 4
For ME EQUIPMENT and ME SYSTEMS that are not LIFE-SUPPORTING
Recommended separation distances between portable and mobile RF communications equipment and the BM 58
The SBM 42 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of
the SBM 42 can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the SBM 42 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
not applicable
80 MHz to 800 MHz
Pd 2.1
800 MHz to 2,5 GHz
Pd 3.2
0,01 - 0,12 0,23
0,1 - 0,38 0,73
1 - 1,2 2,3
10 - 3,8 7,3
100 - 12 23
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