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Guidance and manufacturer's declaration - electromagnetic immunity
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.
Test
a)
Band
frequency
Service
a)
Modulation
(MHz)
(MHz)
385
380-390
TETRA 400
Pulse Modulation
18 Hz
c)
450
430-470
GMRS 460,
FM
FRS 460
±5 kHz deviation
1 kHz sine
Pulse
710
Modulation
704-787
LTE Band 13,
745
217 Hz
17
780
GSM 800/900,
Pulse
810
TETRA 800,
Modulation
800-960
870
iDEN 820,
18 Hz
CDMA 850,
930
LTE Band 5
GSM 1800;
Pulse
1720
CDMA 1900;
Modulation
GSM 1900;
217 Hz
1700-1990
1845
DECT;
1970
LTE Band 1,3
4,25;UMTS
Bluetooth,
Pulse
2450
2400-2570
WLAN
Modulation
802.11 b/g/n,
217 Hz
RFID 2450,
LTE Band 7
5240
WLAN 802.11
Pulse
a/n
Modulation
5500
5100-5800
217 Hz
5785
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.
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:
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.
Maximum
IMMUNITY
Distance
a)
power
TEST LEVEL
(m)
(w)
(V/m)
b)
1.8
0.3
27
2
0.3
28
b)
0.2
0.3
9
b)
2
0.3
28
b)
2
0.3
28
b)
2
0.3
28
b)
0.2
0.3
9
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