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frequency ranges.
c. Field strengths from fixed transmitters, such as base stations for radio
(cellular/cordless) telephones and land mobile radios, amateur radio, AM and
FM radio broadcast and TV broadcast cannot be predicted theoretically with
accuracy. To assess the electromagnetic environment due to fixed RF
transmitters, an electromagnetic site survey should be considered. If the
measured field strength in the location in which the TT-CL012 is used exceeds
the applicable RF compliance level above, the TT-CL012 should be observed to
verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as re-orienting or relocating the TT-CL012.
d. Over the frequency range 150 kHz to 80 MHz, field strengths should be less
than 3 V/m.
19
Recommended separation distances between
portable and mobileRF communications
equipment and the EQUIPMENT or SYSTEM
Recommended separation distances betweenportable
and mobile RF communications equipment and the model TT-CL012
The Model TT-CL012 is intended for use in an electromagnetic environment in
which radiated RF disturbances are controlled. The customer or the user of the
Model TT-CL012 can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment
(transmitters) and the Model TT-CL012 as recommended below, according to the
maximum output power of the communications equipment.
Separation distance according to frequency of
transmitter
m
Rated maximum
output of
150 kHz to 80
80 MHz to 800 MHz
transmitter
MHz
3
5 .
d
[
]
P
=
W
V
1
0.01
0.12
0.1
0.38
1
1.2
10
3.8
100
12
For transmitters rated at a maximum output power not listed above the
recommended separation distance d in metres (m) can be estimated using the
800 MHz to 2.7 GHz
3
5 .
7
d
=
[
]
P
d
=
[
]
P
E
E
1
1
0.12
0.23
0.38
0.73
1.2
2.3
3.8
7.3
12
23
EN
20
