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Field strengths from fixed transmitters, such as base station for radio (cellular/cordless) telephones and land mobile radios,
a
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 Pulse Oximeter (53497) should be observed to verify normal operation.
If abnormal performance is observed, additional measurements may be necessary, such as reorienting of the relocating the
Pulse Oximeter (53497).
Over the frequency range 150 kHz to 80 MHz, fields strengths should be less than 3 V/m
b
portable and mobile RF communications equipment and Pulse Oximeter (53497)
The Pulse Oximeter (53497) is intended for use in electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the Pulse Oximeter (53497) can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the Pulse
Oximeter (53497) as recommended below, according to the maximum output power of the communications equipment.
Rated maximum output
power of transmitter (W)
0
0 .
1
0
1 .
1
1
0
1
0
0
For transmitters rated at a maximum output power not listed above, the recommended separation distanced 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.
16
cs@grahamfield.com
Recommended separation distances between
Separation distance according to frequency of transmitter (m)
80 MHz to 800 MHz
. 0
1 1
6
7
0
3 .
6
8
9
1
1 .
6
6
7
3
6 .
8
9
3
1 1
6 .
6
6
7
800 MHz to 2.5 GHz
0
2 .
3
3
4
0
7 .
3
7
8
2
3 .
3
3
4
7
3 .
7
8
6
2
3
3 .
3
3
4
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