User Manual

Technical Description
Chapter 5 61
Recommended separation distances between portable and mobile RF
communications equipment and the DataRecorder 3
The DataRecorder 3 is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the DataRecorder 3 can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the DataRecorder 3 as recommended below, according to
the maximum output power of the communications equipment.
Rated maximum
output power of
transmitter [W]
Separation distance according to frequency of transmitter [m]
150 kHz to 80 MHz
d = 1.2 P
80 MHz to 800 MHz
d = 1.2 P
800 MHz to 2,5 GHz
d = 2.3 P
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
For transmitters rated at a maximum output power not listed above, the recommended separation distance
d in meters (m) can be determined using the equation applicable to the frequency of the transmitter, where
P is the maximum output power rating of the transmitter in watts (W) according to the transmitter
manufacturer.
NOTE 1: At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
NOTE 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.