Note 1: 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 device is used exceeds the applicable RF
compliance level above, the device should be observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or relocating the device.
b. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
c. Calibration for current injection clamps shall be performed in a 150 Ω system.
d. If the frequency stepping skips over an ISM or amateur band, as applicable, an additional test frequency shall be used in the ISM or amateur radio band.
This applies to each ISM and amateur radio band within the specified frequency range.
e. Applicable to ME EQUIPMENT and ME SYSTEMS with RATED input current less than or equal to 16 A / phase and ME EQUIPMENT and ME SYSTEMS
with RATED input current greater than 16 A / phase.
For transmitters rated at a maximum output power not listed above, the recommended separation distance 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: The ISM (industrial, scientific and medical) bands between 0,15 MHz and 80 MHz are 6,765 MHz to 6,795 MHz; 13,553 MHz to 13,567 MHz; 26,957 MHz
to 27,283 MHz; and 40,66 MHz to 40,70 MHz. The amateur radio bands between 0,15 MHz and 80 MHz are 1,8 MHz to 2,0 MHz, 3,5 MHz to 4,0 MHz, 5,3 MHz
to 5,4 MHz, 7 MHz to 7,3 MHz, 10,1 MHz to 10,15 MHz, 14 MHz to 14,2 MHz, 18,07 MHz to 18,17
MHz,21,0 MHz to 21,4 MHz, 24,89 MHz to 24,99 MHz, 28,0 MHz to 29,7 MHz and 50,0 MHz to 54,0 MHz.
Note 3: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures,objects and people.
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:
E= 6 / d √ P
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.
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 (transmitters)
and the device as recommended below, according to the maximum output power of the communications equipment.
Recommended separation distances between portable and mobile RF communications equipment and the device
Rated
maximum output
power of transmitter
(W)
150 kHz to 80 MHz
(out ISM and amateur
radio bands)
d= 1.2 √ P
150 kHz to 80 MHz
(out ISM and amateur
radio bands)
d= 0.6 √ P
80 MHz to 800 MHz
d= 1.2 √ P
800 MHz to 2.7 GHz
d= 2.3 √ P
0,01
0,1
1
10
100
0,12
0,38
1,2
3,8
12
0,06
0,19
0,6
1,9
6
0,12
0,38
1,2
3,8
12
0,23
0,73
2,3
7,3
23
Separation distance according to frequency of transmitter(m)
Radiated RF
Test
Frequency
(MHz)
Band a)
(MHz)
Service a)
Modulation b)
Modu-
lation b)
(W)
Distance
(m)
Immunity
Test
Level(V/m)
385
450
710
745
780
810
870
930
1720
1845
1970
2450
5240
5240
5785
380-390
380-390
704-787
800-960
1700-1990
2400-2570
5100-5800
TETRA 400
GMRS 460, FRS 460
LTE BANDI 13, 17
GSM 800
/
900, TETRA 800,
İ
DEN 820, LTE Bant 5
GSM 1800, CDMA 1900,
GSM 1900,
DECT, LTE Bant1,3,4,25, UMTS
Bluetooth,WLAN 802.11b
/
g
/
n,
RFID 2450,LTE Bant 7
WLAN 802.11a
/
n
Pulse modulation b) 18 Hz
FM c) ± 5 kHz deviation 1 kHz sine
Pulse modulation b) 217 Hz
Pulse modulation b) 18 Hz
Pulse modulation b) 217 Hz
Pulse modulation b) 217 Hz
Pulse modulation b) 217 Hz
1,8
2
0,2
2
2
2
0,2
0,3
0,3
0,3
0,3
0,3
0,3
0,3
27
28
9
28
28
28
9
IEC61000-4-3
(Test
specifications
for
ENCLOSURE
PORT
IMMUNITY to
RF
wireless
communica-
tions
equipments
17
Содержание UN300 A
Страница 19: ......
