Beurer BM 47 Instruction Manual page 59

Field strength from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur
a
radio, AM and FM radios broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagne-
tic environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the
location in which BM47 is used exceeds the applicable RF compliance level above, BM47 should be observed to verify normal opera-
tion. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating BM47.
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
b
Table 4
For all me equipment and me systems that are not life-supporting
Recommended separation distances between portable and mobile RF communications equipment and BM47
Recommended separation distances between portable and mobile RF communications equipment and BM60
BM47 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of
BM47 can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and BM47 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
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can be esti-
mated 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.
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
d = 1,2
0,12
0,38
1,2
3,8
12
59
(m)
80 MHz to 800 MHz
d = 1,2
0,12
0,38
1,2
3,8
12
800 MHz to 2,5 GHz
d = 2,3
0,23
0,73
2,3
7,3
23