zebris JMAOptic - Page 47

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Recommended protective distances between portable and mobile RF communications equipment
and the JMA-Optic system
The JMA-Optic system is intended for operation in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the JMA-Optic system can help prevent electromagnetic interference by maintaining
the minimum separation between portable and mobile RF communication devices (transmitters) and the JMA-Optic system,
depending on the output power of the communication device.
Rated power of
the transmitter (W)
0.01
0.1
1
10
100
150 kHz bis 80 MHz
d =1,2
√
P
0.12
0.38
1.2
3.8
12
Protective distance, depending on the transmitting frequency (m)
80 MHz bis 800 MHz
d =1,2
√
P
0.12
0.38
1.2
3.8
12
800 MHz bis 2.5 GHz
d=2,3
√
P
0.23
0.73
2.3
7.3
23
For transmitters whose maximum power rating is not specified in the above table, the recommended guard
distance d in meters (m) can be determined using the equation associated with the respective column,
where P is the transmitter‘s rated power in watts (W) as specified by the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not be applicable in all cases.The propagation of electromagnetic
quantities is affected by absorption and reflection from buildings, objects and people.