3M Littmann 3100 Gebrauchsanweisung Handbuch - Seite 18
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Recommended Separation Distances Between Portable and Mobile RF Communications Equipment and the 3M™
Littmann® Electronic Stethoscope Model 3100
The Model 3100 is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the Model 3100 can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment (transmitters) and the Model 3100 as
recommended below, according to the maximum output of the communications equipment.
Rated maximum output
power of transmitter, P [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 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, 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
refl ection from structures, objects and people.
Separation distance according to frequency of transmitters, d [m]
150 kHz to 80 MHz
0.12
0.38
1.2
3.8
12
19
80 Mz to 800 MHz
d = 1,2
P
0.12
0.38
1.2
3.8
12
800 MHz to 2,5 GHz
d = 2,3
P
0.23
0.73
2.3
7.3
23