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multipiezo
11.5
Specifications of the Tests for the Immunity of the
Accessible Parts of the Casing to the Wireless RF
Communications Device
multipiezo is designed to operate in an electromagnetic environment in which radiated RF
disturbances are under control. The purchaser or operator of multipiezo can help prevent
electromagnetic interferences by guaranteeing a minimum distance between the mobile and
portable RF communication devices (transmitters) and multipiezo, as recommended below, in
relation to the maximum output power of the radio communication devices.
Test
Band
a)
Freq.
(MHz)
(MHz)
385
380 - 390
450
430 - 470
710
745
704 - 787
780
810
870
800 - 960
930
1720
1845
1700 - 1990
1970
2450
2400 - 2570
5240
5500
5100 - 5800
5785
a) For some services, only the uplink frequencies are
included.
b) The carrier shall be modulated using a 50% duty cycle
square wave signal.
64
Service
Modulation
a)
Pulse
TETRA 400
modulation
18 Hz
FM
GMRS 460
± 5 kHz
FRS 460
deviation
1 kHz sine
Pulse
LTE band 13,
modulation
17
217 Hz
GSM 800/900
TETRA 800
Pulse
iDEN 820
modulation
CDMA 850
18 Hz
Band LTE 5
GSM 1800
CDMA 1900
GSM 1900
Pulse
DECT
modulation
LTE Band 1, 3,
217 Hz
4, 25
UMTS
Bluetooth
WLAN
Pulse
802.11 b/g/n
modulation
RFID 2450
217 Hz
Band LTE 7
Pulse
WLAN
modulation
802.11 a/n
217 Hz
Max
Distance
power
b)
(W)
1.8
b)
c)
2
0.2
b)
2
b)
2
b)
2
b)
0.2
b)
c)
As an alternative to FM modulation, the carrier may
be pulse modulateci using a 50% duty cycle square
wave signal at 18 Hz. While it does noi represent actual
modulation, it would be worst case.
Immunity
test level
(m)
(V/m)
0.3
27
0.3
28
0.3
9
0.3
28
0.3
28
0.3
28
0.3
9
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