GSi ALLEGRO - Page 62

GSI Allegro Tympanometer User Manual
D-0120695 Rev D 2022-06 Page 49
Recommended Separation Distances between Portable and Mobile RF
Communications Equipment and the GSI Allegro
The GSI Allegro is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the GSI Allegro can help prevent electromagnetic interferences by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters)
and the Allegro 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
Outside ISM bands
d = [3.5/V
1
]
√

150 kHz to 80
MHz (ISM bands)
d=[12/V
2
]
√

80 MHz to 800
MHz
d = [12/E
1
]
√

800 MHz to 2.7
GHz
d = [23/E
1
]
√

0.01
0.12
0.20
0.12
0.23
0.1
0.37
0.63
0.38
0.73
1
1.17
2.00
1.20
2.30
10
3.69
6.32
3.79
7.27
100
11.67
20.00
12.00
23.00
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in
meters (m) can be estimated using the equation applicable to the frequency of the transmitters, 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 to all situations. Electromagnetic propagation is affected by absorption
and reflection from structures, objects and people.