T-IM114b P57/62
T20
Series
OPERATION TABLE
Table 206 - Recommended separation distances between portable and mobile RF communications
equipment and the T20 Series of operation table - for EQUIPMENT and SYSTEMS that are not
LIFE-SUPPORTING.
Recommended separation distances between portable and mobile RF
communications equipment and the T20 Series of operation table
The T20 Series of operation table are intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the T20 operation table can help prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and the T20 operation table as recommended below, according to the maximum output power of
the communications equipment.
Separation distance according to frequency of transmitter
Rated maximum output m
power of transmitter 150 kHz to 80 Mhz 80 MHz to 800 MHz 800 MHz to 2.5 Ghz
W
0.01 0.12 0.12 0.23
0.1 0.37 0.37 0.74
1 1.2 1.2 2.3
10 3.7 3.7 7.4
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.
d
= [——]
3,5
V
1
√
P
d
= [——]
3,5
E
1
√
P
d
= [——]
7
E
1
√
P
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