Loading ...
Loading ...
Loading ...
Table 5
Guidance and manufacturer’s declaration - electromagnetic immunity
Test
Frequency
(MHz)
385
0.3 27
The device is intended for use in the electromagnetic environment specified below. The customer or the
user of the device, should assure that it is used in such an environment.
NOTE If necessary to achieve the IMMUNITY TEST LEVEL, the distance between the transmitting antenna
and the ME EQUIPMENT or ME SYSTEM may be reduced to 1 m. The 1 m test distance is permitted by
IEC 61000-4-3.
Radiated RF
IEC61000-4-3
(Test
specifications
for
ENCLOSURE
PORT
IMMUNITY to
RF wireless
communicatio
ns equipment)
Band a)
(MHz)
Service a) Modulation b) Modulation b)
(W)
Distance (m)
IMMUNITY
TEST
LEVEL
(V/m)
380-390 TETRA
400
Pulse
modulation b)
18Hz
1.8
450 380-390
GMRS 460，
FRS 460
FM c) ± 5kHz
deviation 1kHz
sine
2 0.3 28
710 704-787
745
780
LTE Band
13,
17
Pulse
modulation b)
217Hz
0.2 0.3 9
810
870
930
800-960
GSM
800/900,
TETRA 800,
iDEN 820,
CDMA 850,
LTE Band 5
Pulse
modulation b)
18Hz
2
0.3 28
1720
1845
1970
1700-
1990
GSM 1800;
CDMA 1900;
GSM 1900;
DECT;
LTE Band 1,
3,
4,25; UMTS
Pulse
modulation b)
217Hz
2
0.3 28
2
0.3 282450 2400-
2570
Bluetooth,
WLAN,
802.11
b/g/n, RFID
2450, LTE
Band 7
Pulse
modulation b)
217 Hz
5240
5240
5785
5100-
5800
WLAN
802.11
a/n
Pulse
modulation b)
217 Hz
0.2
0.3 9
a) For some services, only the uplink frequencies are included.
b) The carrier shall be modulated using a 50% duty cycle square wave signal.
c) As an alternative to FM modulation, 50% pulse modulation at 18 Hz may be used because while it does
not represent actual modulation, it would be worst case.
The MANUFACTURER should consider reducing the minimum separation distance, based on RISK
MANAGEMENT, and using higher IMMUNITY TEST LEVELS that are appropriate for the reduced
minimum separation distance. Minimum separation distances for higher IMMUNITY TEST LEVELS shall be
calculated using the following equation:
E=
Where P is the maximum power in W, d is the minimum separation distance in m, and E is the IMMUNITY
TEST LEVEL in V/m.
150 kHz to 80 MHz 80 MHz to 800 MHz
Table 4
Recommended separation distances between portable and mobile RF communications
equipment and the device.
Rated maximum output
power of transmitter
(W)
Separation distance according to frequency of transmitter (m)
0.01
0.1
1
10
100
0.12 0.12
0.38
1.2
3.8
12
=d
=d 1.2
0.37
1.2
3.8
12
3.5
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
(transmittters) and the device 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 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.
P
P
32
EMC GUIDANCE
33
EMC GUIDANCE