Instructions for use MONSOON 5.6e
20/09/2010
56/61
Recommended safety distances between portable and mobile
HF communication devices and the device "MONSOON"
"MONSOON" is intended to be operated in an electromagnetic environment with controlled HF interferences. The operator of the
"MONSOON" can help avoid electromagnetic interference by maintaining the minimum distance between portable and mobile HF
telecommunication devices (transmitters) and the device "MONSOON" – depending on the output rating of the communication de-
vice, as listed below.
Maximum transmitter
power output W
Safety distance depending on frequency
m
150 kHz to 80 MHz
outside
ISM bands
150 kHz to 80 MHz
within
ISM bands
80 MHz to 800 MHz 800 MHz to 2.5 GHz
d = 0.35•P d = 1.2•P d = 1.2•P d = 2.3•P
0.01 0.04 0.12 0.12 0.23
0.1 0.13 0.38 0.38 0.73
1 0.40 1.2 1.2 2.3
10 1.3 3.8 3.8 7.3
100 4.0 12 12 23
For transmitters with a maximum power output not listed in the above table the recommended safety distance
d
in metres (m) can be
determined using the equation from the corresponding column, with
P
being the transmitter’s maximum power output Watts (W) per
the transmitter’s manufacturer specifications.
REMARK 1 At 80 MHz and 800 MHz the safety distance of the higher frequency applies.
ANMERKUNG 2 The ISM bands (industrial, scientific and medical) between 150 kHz and 80 MHz are 6.765 MHz to 6.795 MHz;
13.553 MHz to 13.567 MHz; 26.957 MHz to 27.283 MHz; and 40.66 MHz to 40.7 MHz.
REMARK 3 An additional factor of 10/3 is used when calculating the recommended safety distance for transmitters within the ISM
frequency between 150KHz and 80 MHz and between 80MHz and 2.5GHz to reduce the probability of mobile/portable transmitters
causing interference if accidentally brought into the vicinity of the patient.
REMARK 4 These guidelines may not apply to all case. The propagation of electromagnetic quantities is influenced by absorption
and reflexion of buildings, objects and people.
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