Yuwell YH-550, User Manual, Page: 18 / 20

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Test specifications for ENCLOSURE PORT IMMUNITY to RF wireless communications equipment
Test
frequency
(MHz)
Band
a)
(MHz)
Service
a)
Modulation
b)
Maximum
power
(W)
Distance
(m)
IMMUNITY
TESTL EVEL
(V/m)
385 380-390 TETRA 400
Pulse
modulation
b)
18Hz
1,8 0,3 27
450 430-470
GMRS 460
FRS 460
FM
c)
±5kHz
deviation 1 kHz
sine
2 0,3 28
710
704-787 LTE Band 13,17
Pulse
modulation
b)
217Hz
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)
18Hz
2 0,3 28 870
930
1 720
1 700-1 990
GSM 1800; CDMA
1900; GSM 1900;
DECT; LTE Band
1,3,4,25;UMTS
Pulse
modulation
b)
217Hz
2 0,3 28 1 845
1 970
2 450 2 400-2 570
Bluetooth, WLAN,
802.11 b/g/n, RFID
2450, LTE Band 7
Pulse
modulation
b)
217Hz
2 0,3 28
5 240
5 100-5 800 WLAN 802.11 a/n
Pulse
modulation
b)
217Hz
0,2 0,3 9 5 500
5 785
NOTE
If it's 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.
f
21.3 Precautions
According to IEC60601-1-2:2014, BreathCare PAP（Auto CPAP）complies with all applicable
electromagnetic compatibility requirements (EMC) .It may have harmful interference with other
devices if you do not follow the instructions. However, there is not certain it has not interference with
other devices if you follow the instructions. If it does have interference with other device, you can
amend interference by the following methods.
y Enlarge the distance between this device and other device.
y Connect the two devices with different power socket.
y Ask YUWELL engineer for help.
Essential performance and basic safety testing should be done every two years. If your device needs
to be done, please contact your provider or YUWELL. This device only can be tested by the provider
who has been authorized.