12 EMC
138
Operating Manual ARC 400
900-400_IFU_V1.0.0.6.17.9_20140-S2-20130604-EN
Recommended protective distances between portable and mobile HF telecommunication
devices and the ARC 400 (IEC 60601-1-2, Table 206)
The ARC 400 is designed for operation in an electromagnetic environment in which HF interference is monitored.
The customer or user of the ARC 400 can help to prevent electromagnetic interference by complying with the
minimum distance between portable and mobile HF telecommunication devices (transmitters) and the ARC 400.
This distance depends on the output power of the communication device, as specified below.
Rated transmitter
power (W)
Protective distance (m) at various transmission frequencies
150 kHz to 80 MHz
d = 0.35 × √P
80 MHz to 800 GHz
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 rated power is not specified in the table above, the recommended protective
distance d in meters (m) can be determined using the equation in the corresponding column, where P is the
maximum rated output power of the transmitter in watts (W) as specified by the transmitter manufacturer.
Note 1
The higher frequency range applies in case of 80 MHz and 800 MHz.
Note 2
These guidelines may not be applicable in all cases. The propagation of
electromagnetic waves is influenced by absorption and reflection by buildings, objects
and people.
