User's Manual

Document No.:
35 of 90
Radio-frequency
transmission
GB/T 17626.6
Radio-frequency
radiation
GB/T 17626.3
3V (effective value)
150KHz～80MHz
3V/m
80MHz～2.5GHz
3V (effective
value)
3V/m
The portable and mobile radio-
frequency communication equipment shall
not be closer than the recommended iso-
lation distance to any use part of the M5
portable bladder scanner including ca-
bles. And the calculation of that distance
shall use a formula corresponding to the
frequency of the transmitter.
Recommended distance
d=1.2
d=1.2 80MHz～800MHz
d=2.3 800MHz～2.5GHz
Wherein:
P— The maximum output power of
the transmitter supplied by transmitter
manufacturer, in watt (W);
d— Recommended isolation dis-
tance, in meter (m).
Field strength of fixed radio-
frequency transmitter shall be determined
by electromagnetic site survey, and it
shall be less than the compliance level in
each frequency range.
Interference may occur in the vicinity of
equipment marked with the following
symbols.
Note 1: At the frequency point of 80 MHz and 800 MHz, the formula of higher frequency band shall
be applied.
Note 2: These guidelines may not apply to all situations. Electromagnetic transmission is affected
by the absorption and reflection of buildings, objects and human bodies.
* Fixed transmitters, such as: base stations of wireless (cellular/cordless) telephones and ground
mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast, their field strength cannot
be predicted theoretically and accurately. To assess the electromagnetic environment of fixed radio fre-
quency transmitter, the electromagnetic site survey shall be considered. If it is measured that the field
strength of the place where M5 portable bladder scanner locates is higher than the above RF compli-
ance level, observe M5 portable bladder scanner to verify that it can operate normally. If abnormal per-
formance is observed, additional measures may be necessary, such as readjustment of the direction or
position of the M5 portable bladder scanner.
* Over the frequency range of 150 kHz to 80 MHz, field strength shall be less than 3 V/m.