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82
Where P is the maximum output power rating of the transmitter in watts
(W) according to the transmitter manufacturer and d is the recommen-
ded separation distance in metres (m).
Field strengths from fixed RF transmitters, as determined by an elec-
tromagnetic site surveya should be less than the compliance level in
each frequency rangeb. Interference may occur in the vicinity of equip-
ment marked with the 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 reflec-
tion 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 con-
sidered. If the measured field strength in the location in which the Blood pressure monitor (SBM 37) is used exceeds the
applicable RF compliance level above, the Blood pressure monitor (SBM 37) should be observed to verify normal operation.
If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the Blood
pressure monitor (SBM 37).
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
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