page 23
Recommended safety distances between portable and
mobile RF telecommunication equipment and the U-3003
The U-3003 is intended for operation in an electromagnetic environment, in which the RF
interference variables are verified. The customer or user of the U-3003 can help to prevent
electromagnetic interference by complying with the minimum distance between portable and mobile
RF telecommunication equipment (transmitters) and the U-3003 – depending on the power output
of the communication equipment as stated below.
Safe clearance in metres depending on the transmission frequency
Rated power of the
transmitter in
watts
150 KHz – 80 MHz
80 MHz – 800 MHz
800 MHz – 2,5 GHz
0.01 0.12 0.12 0.24
0.1 0.38 0.38 0.76
1 1.2 1.2 2.4
10 3.8 3.8 7.6
100 12 12 24
For transmitters whose maximum power rating is not stated in the above table, the recommended
safety distance d in metres can be determined using the equation belonging to the relevant column, in
which P is the maximum rated power of the transmitter in watts (W) according to the transmitter
manufacturer’s data.
Note 1: In the case of 80 MHz and 800 MHz, the higher frequency range applies
Note 2: These instructions may not apply in all cases. The propagation of electromagnetic interference
is influenced by absorptions and reflections of buildings, objects and persons.
Test distance for interference resistance of the U-3003 to wireless RF communication devices
Test
frequency
(MHz)
Frequency
band a)
(MHz)
Service a)
Modulation b)
Max.
power
(W)
Distance
(m)
Immunity test level
(V/m)
385
380 - 390
TETRA 400
Pulse modulation
b) 18 Hz
1,8 0,3
27
450
430 - 470
GMRS 460,
FRS 460
FM c) ± 5 kHz
1 kHz Sinus
2 0,3
28
710
745
780
704 –
787
LTE Band 13, 17
Pulse
modulation
b)
217 Hz
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)
18 Hz
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)
217 Hz
2 0,3
28
2450
2400 –
2570
Bluetooth, WLAN
802.11 b/g/n, RFID
2450,
LTE Band 7
Pulse
modulation
b)
217 Hz
2 0,3
28
5240
5500
5785
5100 –
5800
WLAN 802.11 a/n
Pulse
modulation
b)
217 Hz
0,2 0,3
9
Note: If necessary, to achieve immunity test levels, the distance between the transmitting antenna and the
ME device or the ME system can be reduced to 1 metre. The 1 m test distance is permitted according to
IEC 61000-4-3.
a) For some radio services, only the frequencies for the radio circuit from the mobile communication
device to the base station (uplink) have been included in the table.
b) The carrier must be modulated with a Square wave signal with 50% duty cycle
c) Alternatively to the frequency modulation (FM), a pulse modulation with 50% duty cycle at 18 Hz can
be used, as this, although not the actual modulation, would represent the worst case scenario.
Summary of Contents for U-3003-E
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Page 3: ...Ultraschallvernebler Modell U 3003 E Gebrauchsanweisung D ...
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