Table of Contents
Advertisement
Specifications
70
The NPB-40 is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or user of the NPB-40 can
help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and
the NPB-40 as recommended below, according to the maximum output of the
communications equipment.
Recommended Separation Distances between Portable and Mobile RF
Communications Equipment and the NPB-40 (IEC 60601
Frequency of
150 kHz to
Transmitter
80 MHz
Equation
Rated Maximum
Separation
Output Power of
Distance in
Transmitter in
Meters
Watts
0.01
0.12
0.1
0.38
1
1.2
10
3.8
100
12
For transmitters rated at a maximum output power not listed above, the
separation distance can be estimated using the equation in the
corresponding column, where P is the maximum output [power rating of the
transmitter in watts (W)] according to the transmitter manufacturer.
Note: At 80 MHz to 800 MHz, the separation distance for the
higher frequency range applies.
Note: These guidelines may not apply in all situations.
Electromagnetic propagation is affected by absorption and
reflection from structures, objects, and people.
80 MHz to
800 MHz
3.5
3.5
------ -
------ -
d
P
d
=
=
V 1
E 1
Separation
Distance in
Meters
0.12
0.38
1.2
3.8
12
-
-
1
2)
800 MHz to
2.5 GHz
7
------ -
P
d
P
=
V 1
Separation
Distance in
Meters
0.23
0.73
2.3
7.3
23
Advertisement
Table of Contents
Troubleshooting
