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-CL016 is used exceeds
the applicable RF compliance level above, the TT-CL016 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-CL016.
d. Over the frequency range 150 kHz to 80 MHz, field strengths should be less
than 3 V/m.
a. The ISM (industrial, scientific and medical) bands between 0,15 MHz and 80
MHz are 6,765 MHz to 6,795 MHz; 13,553 MHz to 13,567 MHz; 26,957 MHz to
27,283 MHz; and 40,66 MHz to 40,70 MHz. The amateur radio bands between
0,15 MHz and 80 MHz are 1,8 MHz to 2,0 MHz, 3,5 MHz to 4,0 MHz, 5,3 MHz
to 5,4 MHz, 7 MHz to 7,3 MHz, 10,1 MHz to 10,15 MHz, 14 MHz to 14,2 MHz,
18,07 MHz to 18,17 MHz, 21,0 MHz to 21,4 MHz, 24,89 MHz to 24,99 MHz, 28,0
MHz to 29,7 MHz and 50,0 MHz to 54,0 MHz.
b. The compliance levels in the ISM frequency bands between 150 kHz and 80
MHz and in the frequency range 80 MHz to 2,7 GHz are intended to decrease the
likelihood that mobile/portable communications equipment could cause
interference if it is inadvertently brought into patient areas. For this reason, an
additional factor of 10/3 has been incorporated into the formulae used in
calculating the recommended separation distance for transmitters in these
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-CL016
80 MHz to 800 MHz
Separation distance according to frequency of
transmitter
m
150 kHz to 80 MHz
Rated maximum
output of
transmitter
W
800 MHz to 2.7 GHz
The Model TT-CL016 is intended for use in an electromagnetic environment in
which radiated RF disturbances are controlled. The customer or the user of the
Model TT-CL016 can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment
(transmitters) and the Model TT-CL016 as recommended below, according to the
maximum output power of the communications equipment.
P
V
d
]
5
.
3
[
1
=
P
E
d
]
5
.
3
[
1
=
P
E
d
]
7
[
1
=
0.01
0.1
1
10
100
0.12
0.38
1.2
3.8
12
0.23
0.73
2.3
7.3
23
0.12
0.38
1.2
3.8
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
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.
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EN
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