AmpliVox PC850 - Page 42

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D-0116493-B (OM015) – PC850 Operating Manual
Recommended separation distances between portable and mobile RF communications equipment and
the PC850 Audiometer
The PC850 Audiometer is intended for use in an electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of the PC850 Audiometer can help prevent electromagnetic interference
by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters)
and the PC850 Audiometer 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√P
80 MHz to 800 MHz
d = 1.2√P
800 MHz to 2.5 GHz
d = 2.3√P
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
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 80MHz and 800MHz, 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.
NOTE 3 WARNING: Portable RF communications equipment (including peripherals such as antenna cables
and external antennas) should be used no closer than 30cm (12 inches) to any part of the PC850 audiometer
including cables specified by the manufacturer. Otherwise degradation of the performance of this equipment
could result.