24
Wagner & Guder Medical GmbH
issue May 2021
Direction for use, cubeLITE
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 broad-cast 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 this product is used exceeds the applicable RF compliance level
above, this product should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-
orienting or relocating this product.
b.
c.
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 10 V/m.
Possible shorter distances outside the ISM bands do not contribute to improved application in
this table.
Recommended safe distances between portable and mobile HF communication
devices and this device.
This product is designed to be operated in an electromagnetic environment in which
radiated HF interference is controlled. The customer or user of this product can help to
prevent electromagnetic interference by maintaining minimum distances between
portable and mobile HF communication systems (transmitters) and this product, as
recommended below in accordance with the maximum output of the communication
system.
Nominal output
of the transmitter
(W)
Safe distance according to transmission frequency (m)
150kHz - 80MHz
d=0,35
P
80MHz - 800MHz
d=0,7
P
800MHz - 2,7GHz
d=1,4
P
0,01
0,035
0,07
0,14
0,1
0,11
0,2
0,44
1
0,35
0,7
1,4
10
1,11
2,2
4,4
100
3,5
7
14
For transmitters with a nominal output not listed in the table above, the distance
D
can be calcu-
lated in meters
(m)
using the equation for the respective column, in which
P
is the nominal output
of the transmitter in watts
(W)
according to the specification of the transmitter manufacturer.
NOTE 1:
At 80 MHz and 800 MHz the higher frequency applies.
NOTE 2:
To calculate the recommended safe distance of transmitters in the frequency range of
80 MHz to 2.7 GHz an additional factor of 10/3 was used to reduce the probability of a
mobile/portable communication device causing interference if inadvertently brought
into the patient area.
NOTE 3:
These guidelines may not apply in all situations. Electromagnetic wave propagation is
influenced by absorption and reflection of buildings, objects and people.
