Welch Allyn Solarc Light Source - User Manual - Manual (Page 27)

Directions for Use Chapter 4 Specifications 25
Recommended Separation Distances Between Portable and Mobile RF Communications
Equipment and the Welch Allyn Light Source
The Welch Allyn Light Source is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or user of the Welch Allyn Light Source can
help prevent electromagnetic interference by maintaining a minimum distance between portable
and mobile RF communications equipment (transmitters) and the Welch Allyn Light Source as
recommended below, according to the maximum output power of the communications equipment.
Rated max.
output power
of transmitter
(W)
Separation distance according to frequency of transmitter (m)
150 kHz to 80 MHz
d = (1.17)
80 MHz to 800 MHz
d = (1.17)
800 MHz to 2.5 GHz
d = (2.33)
0.01 0.117 0.117 0.233
0.1 0.37 0.37 0.74
1 1.17 1.17 2.33
10 3.70 3.70 7.37
100 11.70 11.70 23.30
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d in meters (m) can be estimated 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.
P P P