21
IMMUNITY TEST
AND STANDARD
IEC 60601 TEST
LEVEL
COMPLIANCE LEVEL
ELECTROMAGNETIC ENVIRONMENT - GUIDANCE
Conducted RF
IEC 61000-4-6
3 Vrms
0,15 – 80 MHz
6 V in ISM bands be-
tween 0 .15 MHz and
80 MHz
80 % AM at 1 kHz
3 Vrms
Portable and mobile RF communications equipment
should be used no closer to any part of the
MRIaudio Sound System, including cables, than the
recommended separation distance calculated from
the equation applicable to the frequency of the
transmitter .
Recommended separation distance:
- 80MHz to 800 MHz
- 800MHz to 2 .7 GHz
Where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter
manufacturer and d is the recommended separation
distance in meters (m). Field strengths from fixed RF
transmitters, as determined by an electromagnetic
site survey*, should be less than the compliance level
in each frequency range .**
Interference may occur in the vicinity of equipment
marked with the following symbol:
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz – 2 .7 GHz
80 % AM at 1 kHz
3 V/m
NOTE: At 80 MHz and 800 MHz, 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 .
*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
MRIaudio Sound system is used exceeds the applicable RF compliance level above, the 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 MRIaudio Sound system.
**Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between portable and mobile RF communications equipment and the MRIaudio Sound System.
The MRIaudio Sound system is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled .
The customer or the user of the MRIaudio Sound system can help prevent electromagnetic interference by maintaining a minimum
distance between portable and mobile RF communications equipment (transmitters) and the MRIaudio Sound System as recommended
below, according to the maximum output power of the communications equipment .
EMC INFORMATION
IM-1505 Rev. D
