ETEKCITY B22 User Manual page 35

Guidance and manufacture's declaration – electromagnetic immunity
10 V/m
Radiated RF
80 MHz to 2.7 GHz
IEC 61000-4-3
80% AM at 1kHz
Note 1: At 80 MHz and 800 MHz, the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures,
objects and people.
A. Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur radio,
AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic environment
due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which
the "Digital Blood Pressure Monitor B22" is used exceeds the applicable RF compliance level above, the "Digital Blood Pressure Monitor
B22" should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the "Digital Blood Pressure Monitor B22".
B. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than [V1] V/m.
80MHz to 800MHz:
d=1.2√p
800MHzto 2.7GHz:
d=2.3√p
10 V/m Where, P is the maximum output power rating
of the transmitter in watts (W) according to
80 MHz to 2.7 GHz the transmitter manufacturer and d is the
recommended separation distance.
80% AM at 1kHz
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site survey,
should be less than the compliance level in
each frequency range. Interference may occur
in the vicinity of equipment marked with the
following symbol:
EN
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