Operating instructions

Page 29 of 34
7.5.4 Recommended Separation Distances
Recommended Separation Distances
Between Portable And Mobile RF Communications Equipment
And The Sentry1250/ST-1200/1400
The Sentry/ST System is intended for use in an electromagnetic environment in which radiated
RF disturbances are controlled. The customer or the user of the Sentry/ST System can help
prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the Sentry/ST System 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
80 MHz to 800 MHz
800 MHz to 2,5 GHz
Pd 2.1
Pd 2.1
Pd 3.2
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 metres (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.