38
Notes on EMC
Recommended separations between portable and mobile RF
Communications equipment and the ATMOS® Cam 21 / 31
The ATMOS® Cam 21 / 31 is intended for use in electromagnetic environment in which
radiated disturbances are controlled. The customer or user of the ATMOS® Cam 21 /
31 can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF Communications equipment and the ATMOS® Cam
21 / 31 as recommended below, according to the maximum output power of the
communications equipment.
Safety distance, depending on transmit-frequency m
Nominal output of
the transmitter
W
150 kHz to 80 MHz
d = (3.5/V1) *sqrt(P)
80 MHz to 800 MHz
d = (3.5/E1) *sqrt(P)
800 MHz to 2.5 GHz
d = (7/E1) *sqrt(P)
0.01
0.12
0.12
0.23
0.1
0.37
0.37
0.74
1
1.17
1.17
2.33
10
3.69
3.69
7.38
100
11.67
11.67
23.33
For transmitters for which the maximum nominal output is not indicated in the above table,
the recommended safety distance d in meters (m) can be determined using the equation
belonging to the respective column whereas P is the maximum nominal output of the
transmitter in watts (W) acc. to manufacturer´s specification.
NOTE 1 By 80 MHz and 800 MHz the higher frequency range applies.
NOTE 2 These guidelines might not be applicable in any case. The emanation of
electromagnetic waves is affected by absorption and reflection of buildings, objects and
people.
