23
Guide and manufacturer's statement - electromagnetic immunity
This product is expected to be used in the electromagnetic environment
specified below, and the purchaser or user shall ensure that it is used in such
electromagnetic environment
Immunity test
YY0505 Test electrical
Level Guide
Electrical
level of
compliance
Electromagnetic
Environment -
Guide
electrical level.
Table 3
Guide and manufacturer's statement - electromagnetic immunity
This product is expected to be used in the electromagnetic environment
specified below, and the purchaser or user shall ensure that it is used in such
electromagnetic environment
Immunit
y test
YY0505
Test
electrical
Level
Electrical
level of
compliance
Electromagnetic Environment —— Guide
RF
conducti
onGB/T
17626.6
Radio-
frequenc
yGB/T
17626.3
3V(effectiv
e value)
150 kHz ～
80 MHz
3 V/m
80 MHz ～
2.5 GHz
Not
applicable
3 V/m
80 MHz ～
2.5 GHz
Portable and mobile RF communication
equipment shall not be closer to any part
of this product than the recommended
isolation distance, including cables, which
shall be calculated using a formula
corresponding
to
the
transmitter
frequency.
Recommended isolation distance
d=1.2
P
80 MHz～800 MHz
d=2.3
P
800 MHz～2.5 GHz
Formula：
P——Transmitter maximum output rated
power in watts (w) provided by the
transmitter
manufacturer;d
—
—
Recommended isolation
distance
in
meters (m) units.
The field strength of the fixed RF
transmitter is determined by
surveying
the electromagnetic field a, and each
frequency range should b be lower than
the conformance electrical level.
Interference may occur near the device
that marks the following symbols
.
Remark 1：The formula of higher frequency band should be used in 80mHz and
800mHz frequency.
Remark 2 ： These guidelines may not be suitable for all situations.
Electromagnetic propagation is affected by the absorption and reflection of
buildings, objects and human bodies.
a. Fixed transmitters, such as wireless (Honeycomb / cordless) telephones and
mobile radio base stations on the ground, amateur radios, AMF radio broadcasts
and television broadcasts, all have fields whose strength is theoretically
unpredictable. In order to evaluate the electromagnetic environment of fixed
radio frequency transmitters, electromagnetic field survey should be considered.
If the measured field intensity of the product is higher than the above RF
coincidence level, the product should be observed to verify its normal operation.
If abnormal performance is observed, supplementary measures may be
necessary, such as reorienting or positioning the product.
