Citizen CH-453 - Page 31

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Guidance and manufacturer’s declaration - electromagnetic immunity
The [CH-453-AC] is intended for use in the electromagnetic environment specied below. The
customer or the user of the [CH-453-AC] should assure that it is used in such an environment.
Immunity
to proximity
elds from
RF wireless
communications
equipment IEC
61000-4-3
Test
Frequncy
(MHz)
Band a)
(MHz)
Service a) Modulation
b)
Maximum
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
deviation
1 kHz sine
2 0.3 28
710 704-787 L
TE Band
13, 17
Pulse
modulation
b) 217 Hz
0.2 0.3 9
745
780
810 800-960 GSM 800/900,
TETRA
800,
iDEN 820,
CDMA 850,
LTE Band 5
Pulse
modulation
b) 18 Hz
2 0.3 28
870
930
1720 1700-
1900
GSM 1800;
CDMA
1900;
GSM 1900;
DECT;
LTE Band
1, 3, 4, 25;
UMTS
Pulse
modulation
b) 217 Hz
2 0.3 28
1845
1970
2450 2400-
2570
Bluetooth,
WLAN,
802.11 b/g/n,
RFID 2450,
L
TE Band 7
Pulse
modulation
b) 217 Hz
2 0.3 28
5240 5100-
5800
WLAN 802.1
1
a/n
Pulse
modulation
b) 217 Hz
0.2 0.3 9
5500
5785
NOTE If necessary to achieve the IMMUNITY TEST LEVEL, the distance between the
transmitting antenna and the [CH-453-AC] 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.
CH-4531901.indb31 2019/05/3113:45