Eko CORE Benutzerhandbuch Seite 16

Declaration - Electromagnetic Immunity (continued)
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones
a
and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be
predicted theoretically with accuracy. To address 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 Eko Electronic Stethoscope System is used exceeds the applicable RF compliance
level above, the Eko Electronic Stethoscope System should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as re-orienting or
relocating the Eko Electronic Stethoscope System.
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
b
Recommended Separation Distances Between Portable and
Mobile RF Communications Equipment and the Eko Electronic
The Eko Electronic Stethoscope System is intended for use in the electromagnetic environment in which
radiated RF disturbances are controlled. The user of the Eko Electronic Stethoscope System can help
prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the Eko Electronic Stethoscope System as
recommended below, according to the maximum output power of the communications equipment.
Rated Maximum
Output Power of
Transmitter (W)
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d is meters (m) can be estimated using the equation applicable to the frequency of the
transmitter, where P is the maximum 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.
16
Guidance and Manufacturer's
Stethoscope System
Separation Distance According to Frequency of Transmitter (m)
150 kHz to 80 MHz
d = 1.2 √P
0.12
0.37
1.2
3.7
12
80 MHz to 800 MHz
d = 1.2 √P
0.12
0.37
1.2
3.7
12
800 MHz to 2.5 GHz
d = 2.3 √P
0.23
0.74
2.3
7.4
23