Citizen CH-617 Mode D'emploi page 27

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 device is used exceeds the applicable
RF compliance level above, the deivce should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be
necessary, such as reorienting or relocating the device.
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 device
The device is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the device can help prevent
electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the deivce 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
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
d = 1,2
0,12
0,38
1,2
3,8
12
m
80 MHz to 800 MHz
d = 1,2
0,12
0,38
1,2
3,8
12
23
800 MHz to 2,5 GHz
d = 2,3
0,23
0,73
2,3
7,3
23