User Manual for Vital Signs Monitor
65
a) For some services, only the uplink frequencies are included
b) The carrier shall be modulated using a 50 % duty cycle square wave signal.
c) As an alternative to FM modulation, 50 % pulse modulation at 18 Hz may be used because while
it does not represent actual modulation, it would be worst case.
Table 5
Recommended separation distances between portable and mobile RF communication
the equipment
The Vital Signs Monitor is intended for use in an electromagnetic environment in
which radiated RF disturbances are controlled. The customer or the user of The Vital
Signs Monitor can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment
(transmitters) and the Vital Signs Monitor as recommended below, according to the
maximum output power of the communications equipment.
Rated
maximum
output
power
of
transmitter
W(Watts)
Separation distance according to frequency of transmitter
M(Meters)
150kHz to 80MHz
d=1.2
P
80MHz to 800MHz
d=1.2
P
80MHz to 2,5GHz
d=2.3
P
0,01
N/A
0.12
0.23
0,1
N/A
0.38
0.73
1
N/A
1.2
2.3
10
N/A
3.8
7.3
100
N/A
12
23
For transmitters rated at a maximum output power not listed above, the recommended
separation distance in metres (m) can be determined using the equation applicable to
the frequency of the transmitter, where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1 : At 80 MHz and 800 MHz, the separation distance for 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.