Where P is the maximum output
power rating of the transmitter in
watts (W) according to the
transmitter manufacturer and d is
the recommended separation
distance in meters (m).
Field strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey
a
should be less than the
compliance level in each
frequency range
b
Interference
may occur in the vicinity of
equipment marked with
following symbol:
⚫ 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
heoretically 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 MD-ID0400 is used
exceeds the applicable RF compliance level above, the MD-ID0400 should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the MD-ID0400.
b) When the frequency range exceeds 150 kHz – 80 MHz, the electric field strength should be not higher
than 3 V/m.
c) The ISM (Industrial, Scientific and Medical) bands between 150 kHz and 80 MHz are 6.765 MHz
to6.795MHz; 13.553 MHz to 13.567 MHz; 26.957 MHz to 27.283 MHz; and 40.66 MHz to 40.70 MHz
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