recommended separation distance in
meters (m).
Field
strengths
from
fixed
RF
transmitters, as determined by an
electromagnetic site survey,
a
should
be less than the compliance level in
each frequency range.
b
Interference may occur in the vicinity
of equipment
marked with the following symbol:
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 [KD-551] is used
exceeds the applicable RF compliance level above, the [KD-551] should be observed to verify
normal operation. If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or relocating the [KD-551].
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3V/m.
Table 4
For ME EQUIPMENT and ME SYSTEMS that are not LIFE-SUPPORTING
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
P
d
2
.
1
P
d
2
.
1
P
d
2.3
80 MHz to 800 MHz
800 MHz to 2,5 GHz
0,01
0.12
0.12
0.23
0,1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
The [KD-551] is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the [KD-551] can help prevent electro-
magnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the [KD-551] as recommended below, according
to the maximum output power of the communications equipment.
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d in meters (m) can be determined 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.
Rated maximum
output
power of transmit-
ter
W
Recommended separation distances between
portable and mobile RF communications equipment and the [KD-551]
27
26
