26
Immunity
test
IEC 60501
test level
Compliance
level
Electromagnetic environment guidance
Portable and mobile RF Communications
equipment should be used no closer to any
part of the device, including cables, than
the recommended separation distance
calculated from the equation applicable
to the frequency of the transmitter.
Recommended separation distance
Conducted
RF lEC
61000-4-6
3 Vrms
150 kHz
to 80 MHz
3 Vrms
Radiated
RF lEC
61000-4-3
3 V/m80
MHz to
2.5 GHz
3 V/m
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, a should
be less than the compliance level in each
frequency range b.
NOTE I. 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.
1. Field strengths from fixed transmitters, such as base stations for radio (cellular/
cordless) telephones and land mobile radios, amateur radio, AM and FM 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 device is used exceeds the applicable RF compliance level above, should be
observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the device.
2. Over the frequency range 150 kHz to 80 MHz, field strength should be less than
(Vi) W/m.
80 MHz
to 800 MHz
800 MHz
to 2.5 MHz
