29
12.6. RECOMMENDED SEPARATION DISTANCES BETWEEN PORTABLE AND MOBILE RF
COMMUNICATIONS EQUIPMENT AND DA-20
DA-20 has passed test according to the standard YY 0505-2012 and standard IEC 60601-1-2：2004, but it cannot
guarantee in any way that it is not affected by electromagnetic interference. DA-20 should be avoided using in high
electromagnetic environments.
RECOMMENDED SEPARATION DISTANCES BETWEEN PORTABLE AND MOBILE RF
COMMUNICATIONS EQUIPMENT AND DA-20
DA-20 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of
DA-20 can help prevent electromagnetic interferences by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and DA-20 as recommended below, according to the maximum output power of the communications equipment.
Rated maximum output
power of transmitter W
Separation distance according to frequency of transmitter M
150 kHz～80 MHz
p
V
d
1
5
.
3
80 MHz～800 MHz
p
E
d
1
5
.
3
800 MHz～2.5 GHz
p
E
d
1
7
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
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 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 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.
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