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Recommended separation distances between portable and mobile HF communication devices
The BTL-4000 Smart/Premium device is intended for use in an electromagnetic environment in which radiated
HF disturbance is controlled. The customer or the user of the BTL-4000 Smart/Premium can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile HF
communication equipment (transmitters) and the BTL-4000 Smart/Premium as recommended below, according
to the maximum output power of the communication equipment.
Rated maximum output
power of the transmitter [W]
0.01
0.1
1
10
100
For transmitters at a maximum output power not listed above, the recommended separation distance d in
meters (m) can be estimated using the equation applicable for 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: In case of a frequency of 80 MHz or 800 MHz, the formula for higher frequency range is applicable.
NOTE 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
BTL-4000 SMART/PREMIUM – MODE D'EMPLOI I PAGE 56 DE 57
and the BTL-4000 Smart/Premium
Separation distance according to the frequency of the transmitter [m]
150 kHz – 80 MHz
]√P
d = [3.5/V
1
0.12
0.38
1.2
3.8
12
T
e
x
JFB MEDICAL
46 route des bancs de pierre
69690 Bessenay
T 04 74 70 89 08
Email jfb@jfb.fr
Site www.jfb.fr
80 MHz – 800 MHz
]√P
d = [3.5/E
1
0.12
0.38
1.2
3.8
12
800 MHz – 2.5 GHz
]√P
d = [7/E
1
0.23
0.73
2.3
7.3
23
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