Radiated RF
IEC 61000-4-3
3V/m
150 kHzto 80 MHz
3V/m
80MHz to 2.5 GHz
3V/m
Portableand mobile RF communications equip-
ment should be used no closer to any part of
MADSEN Astera²,including cables, than the recom-
mended separation distance calculated from the
equation applicable to the frequency of the trans-
mitter.
Recommended separation distance:
d = 1.2
d = 1.2
for 80MHz to 800 MHz
d = 2.3
for 80MHz to 2.5 GHz,
where
P
is the maximum output power rating of
the transmitter in watts (W) according to the trans-
mitter manufacturer and d is the recommended
separation distance in metres (m).
Field strengthsfrom fixed RF transmitters, as
determined by an electromagnetic site survey,
a
should beless than the compliance level in each
frequency range.
b
Interference may occur in the vicinity of equip-
ment marked with this symbol:
Note 1
:At 80 MHzand 800 MHz the separation distancefor the higher frequency range applies.
Note 2
:These guidelinesmay not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects and
people.
a. The ISM(industrial, scientific and medical) bands between 150 kHz and 80 MHzare 6.765 MHzto 6.795 MHz; 13.553 MHz to 13.567 MHz; 26.957 MHzto 27.283
MHz; and 40.66 MHzto 40,70 MHz.
b. The compliance levels in the ISMfrequency bands between 150 kHz and 80 MHzand in the frequency range 80MHz to 2.5 GHzare intended to decrease the
likelihood that mobile/portable communications equipment could cause interference if it isinadvertently brought into patient areas. For this reason, an
additional factor of 10/3 is used in calculating the recommended separation distance for transmitters in these frequency ranges.
Field strengthsfrom fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios,amateur radio, AM and FMradio
broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an elec-
tromagnetic site survey should be considered. If the measured field strength in the location in which MADSEN Astera² is used exceeds the applicable RF com-
pliancelevel above, the MADSEN Astera² should be observed to verify normal operation. If abnormal performance isobserved, additional measuresmight be
necessary, such as reorienting or relocating MADSEN Astera².
Over the frequency range 150 kHzto 80MHz, field strengths should beless than 3 V/m.
Recommended separation distances between portable and mobile RF communications equipment and MADSEN Astera²
The MADSEN Astera² is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the
MADSEN Astera² can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equip-
ment (transmitters) and the MADSEN Astera²as recommended below, according to the maximum output power of the communications equipment.
32
Otometrics - MADSEN Astera²
16 Technical Specifications
