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Recommended separation distances between portable and mobile
RF communications equipment and the Tracker Freedom System
The Tracker Freedom System is intended for use in an electromagnetic environment in
which radiated RF disturbances are controlled . The customer or the user of the Tracker
Freedom System can help prevent electromagnetic interference by maintaining a minimum
distance between portable and mobile RF communications equipment (transmitters) and
the Tracker Freedom System as recommended below, according to the maximum output
power of the communications equipment .
Rated maximum output
power of transmitter
W
0 .01
0 .1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended
separation distance d in meters (m) can be estimated 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 .
Separation distance according to frequency of transmitter
150 kHz to 80
MHz
d=1.2√P
0 .12
0 .38
1 .2
3 .8
12
Transmitter and Receiver Specifications
Bandwidth
902-928 MHz (US)
868-869 .3 MHz (EU)
Modulation
Digital (FSK)
ERP
0 dBm
m
80 MHz to 800
800 MHz to 2 .5 GHz
MHz
d=1.2√P
0 .12
0 .38
1 .2
3 .8
12
d=2.3√P
0 .23
0 .73
2 .3
7 .3
23
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