Micro Direct MicroLoop Operating Manual page 34

Immunity
Test
Radiated RF
IEC61000-4-3
NOTE 1 At 80 MHz and 800 MHz, 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.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular /
cordless) telephones and land mobile radios, amateur radios, 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 MicroLoop is used exceeds the applicable RF compliance
level above, the MicroLoop should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as
re-orientating or relocating the MicroLoop
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3
V / m
IEC 60601 Compliance
Test Level
3 V/m 80 3 V/m
Mhz to 2.5
Ghz
Electromagnetic Environment -
Level Guidance
d = 1.2√ P
d = 2.3√ P
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).
Fields 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:
31
80 MHz to 800 MHz
800 MHz to 2.5 GHz
a
b