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 transrnitters, an electromagnetic site survey should be
considered.
If
the measured field strength in the location in which the LMD-2735MD/2435MD is used exceeds the
applicable RF compliance level above, the LMD-2735MD/2435MD should be observed to verify normal operation.
If
abnormal perforrnance is observed, additional measures may be necessary, such as reorienting or relocating the
LMD-2735MD/2435MD.
b Over the frequency range 15 0 kHz to 80 MHz, field strengths should be less than 3 V/m.
c The ISM (industrial, scientific and medical) bands between 15 0 kHz and 80 MHz are 6.765 MHz to 6.795 MHz;
13.5 5 3 MHz to 13.5 67 MHz; 26.95 7 MHz to 27.283 MHz; and 40.66 MHz to 40.70 MHz.
Recommended separation distances between po11able and mobile RF communications equipment
and the LMD-2ir35MD/2435MD
The LMD-2735MD/2435MD is intended for use in an electromagnetic environment
in
which radiated RF disturbances
are controlled. The customer or the user of the LMD-2735MD/2435MD can help prevent electromagnetic interference
by maintaining a rnin
i
mum distance between portable and miobile RF communications equipment (transmitters) and the
LMD-2735MD/2435MD as recommended below, according to the maximum output power of the communications
equipment.
S eparation distance according to frequency of transmitter
m
Ra
t
ed maximum output
IEC 60601-1-2: 2007
IEC 60601-1-2: 2014
power of transmitter
w
15 0 kHz to
80MHz to
800MHz to
15 0
kHz
to
80MHz to
80MHz
800MHz
2.5 GHz
80MHz
2.7 GHz
d= l .2✓P
d= 1.2 ✓P
d=2.3✓P
d= 1.2 ✓P
d=2.0✓P
0.01
0.12
0.12
0.23
0.12
0.20
0.1
0.38
0.38
0.73
0.38
0.63
1
1.2
1.2
2.3
1.2
2.0
10
3.8
3.8
7.3
3.8
6.3
100
12
12
23
12
20
For transmitters rated a maximum output power not listed above, the recommended separation distance d
in
meters (m)
can be estimated using the equation applicable to the freque
1
ncy of the transmitter, where
P
is the maximum output
power rating of the transmitter
in
watts (W) according to the transmitter manufacturer.
NOTE 1:
A t 80 MHz and 800 MHz, the separation distan,;:e 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.
