Danmeter CSM 2 User Manual page 37

Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless)
(a)
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 CSM Is used exceeds the applicable
RF compliance level above, the CSM should be observed to verify normal operation, If abnormal
performance is observed, additional measures may be necessary, such as reorienting or
relocating the CSM.
(b) Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between portable and mobile RF communications equipment and the
CSM
The CSM is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the CSM can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters)
and the CSM as recommended below, according to the maximum output power of the communications
Rated maximum Separation distance according to frequency of transmitter
output power
m
of transmitter
150 kHz to 80 MHz
W
d
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 meters (m) can be estimated using the equation applicable to the frequency of the transmitter, where
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.
Cerebral State Monitor - CSM DFU
80 MHz to 800 MHz
= =
1 2 , P d 1
0,12
0,38
1,2
3,8
12
800 MHz to 2,5 GHz
=
2 , P d 2 3 ,
0,23
0,73
2,3
7,3
23
P
P
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