g.tec medical engineering GmbH
g.USBamp, USB Biosignal Amplifier: Instruction for use
____________________________________________________________________________________________________________________
V2.16.09
Page 32
Recommended separation distances between portable and mobile RF communications
equipment and the g.USBamp
The g.USBamp is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the g.USBamp can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the g.USBamp 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
P
V
d
1
5
,
3
80 MHz to 800 MHz
P
E
d
1
5
,
3
800 MHz to 2.5 GHz
P
E
d
1
7
0,01
0,35
0,35
0,70
0,1
1,11
1,11
2,21
1
3,50
3,50
7,00
10
11,07
11,07
22,14
100
35,00
35,00
70,00
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d in metres (m) can be determined 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 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.