Sanitas SIH 21 Mode D'emploi page 47

NOTE 1 At 80 MHz and 800 MHz, 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.
a
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 SIH21 is used
exceeds the applicable RF compliance level above, the SIH21 should be observed to verify normal opera-
tion. If abnormal performance is observed, additional measures may be necessary, such as re-orienting or
relocating the SIH21.
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 SIH21
The SIH21 is intended for use in an electromagnetic environment in which radiated RF disturbances are con-
trolled. The customer or the user of the SIH21 can help prevent electromagnetic interference by maintaining
a minimum distance between portable and mobile RF communications equipment (transmitters) and the
SIH21 as recommended below, according to the maximum output power of the communications equipment.
Rated maximum output
power of transmitter
W
0.01
0.1
1
10
100
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.
All manuals and user guides at all-guides.com
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
d = 1,2 P
0.12
0.38
1.2
3.8
12
m
80 MHz to 800 MHz
d = 1,2 P
0.12
0.38
1.2
3.8
12
47
800 MHz to 2.5 GHz
d = 2,3 P
0.23
0.73
2.3
7.3
23