Gebrauchsanweisung Untersuchungseinheit cubeONE,
directions for use, refraction unit cubeONE
36
Wagner & Guder Medical GmbH
issue September 2020
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
calculated 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.
