Bowa ARC 300, Operating Manual

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13 EMC
900-350_IFU_V2.6_10296-S13-20100111-EN ARC 300 / ARC 350 Operating manual
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Recommended protective working clearances between portable and mobile HF
telecommunications devices and the ARC 300 and/or ARC 350 (DIN EN 60601-1-2, Table 206)
The ARC 300 and ARC 350 are designed for operation in an electromagnetic environment in which HF interference
is monitored. The customer or user of the ARC 300 and ARC 350 can help to prevent electromagnetic interference
by complying with the minimum clearance between portable and mobile HF telecommunication devices
(transmitters) and the ARC 300 and ARC 350. These clearances may vary depending on the output power of the
relevant communication device as specified below.
Protective working clearance depending on the transmission frequency (m)
Nominal transmitter
output (W)
150 kHz to 80 MHz
d = 0.35 × √ P
80 MHz to 800 MHz
d = 0.35 × √ P
800 MHz to 2.5 GHz
d = 0.7 × √ P
0.01 0.035 0.035 0.07
0.1 0.11 0.11 0.22
1 0.35 0.35 0.70
10 1.1 1.1 2.2
100 3.5 3.5 7.0
For transmitters whose maximum nominal output is not specified in the table above, the recommended protective
working clearance d in meters (m) can be determined using the equation in the corresponding column, where P is
the maximum nominal output of the transmitter in watts (W) specified by the transmitter manufacturer.
Note 1 The higher frequency range applies to 80 MHz and 800 MHz.
Note 2 These guidelines may not be applicable in all cases. The propagation of
electromagnetic waves is influenced by their absorption and reflection by buildings,
objects and people.
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