32
Radiat-
ed RF
IEC
61000-
4-3
10V/m
& table
9
10V/m
&
table 9
Portable and mobile RF communications
equipment should be used not closer
to any part of the Blood Pressure
Monitor, including cables, than the
recommended separation distance
calculated from the equation applicable
to the frequency of the transmitter.
Recommended separation distance:
=
1.167
=
2.333
80 MHz to 800 MHz
800 MHz to 2.5 GHz
Where P is the maximum output
power rating of the transmitter in
watts (W) according to the transmitter
manufacturer and 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 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
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 Blood
Pressure Monitor is used exceeds the applicable RF compliance
level above, the Blood Pressure Monitor 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.
b
Over the frequency range 150 kHz to 80 MHz, field strengths
should be less than [Vi] V/m.