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Service Manual
10
VNUS Radio Frequency Generator
Guidance and manufacturer’s declaration - electromagnetic immunity
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz to 80 MHz
3 V/m
80 MHz to 2 .5 GHz
3 Vrms
3 V/m
Portable and mobile RF
communications equipment should
be used no closer to any part of the
RFG2, including cables, than the
recommended separation distance
calculated from the equation
applicable to the frequency of the
transmitter .
Recommended separation distance
d=1 .2 √P
d=1 .2 √P 80 MHz to 800 MHz
d=2 .3 √P 800 MHz to 2 .5 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 metres (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
Interference may occur in the vicinity of
equipment marked with the following
symbol:
NOTE U
T
is the a .c . mains voltage prior to application of the test level .
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 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 RF Generator is used exceeds
the applicable RF compliance level above, the RF Generator should be observed to verify normal operation . If
abnormal performance is observed, additional measures may be necessary, such as re-orienting or relocating the RF
Generator .
b) Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m .
Table 6: Separation Distances
Recommended separation distances between portable and mobile
RF communications equipment and the RF Generator
The RF Generator is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled . The customer or the user of the RF Generator can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the RF Generator as recommended below, according
to the maximum output power of the communications equipment .
Rated maximum
output power of
transmitter
W
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
d=1 .2
S
P
80 MHz to 800 MHz
d=1 .2
S
P
800 MHz to 2 .5 GHz
d=2 .3
S
P
0 .01
0 .1
0 .1
0 .2
.1
0 .4
0 .4
0 .7
1
1 .2
1 .2
2 .3
10
3 .8
3 .8
7 .3
100
12
12
23
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d in metres (m) can be estimated using the equation applicable to the frequency of the
transmitter, where P is the maximum output 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 .
