Use Instructions

survey,
b
should be less
than the compliance
level in each frequency
range.
c
Interference
may occur in the vicinity
of equipment marked
with the following
symbol:
Note 1: These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects, and people.
a. Essential performance of the Naída CI per IEC 60601 requirements is defined as auditory stimulation
within safe amplitudes.
b. Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones
and land mobile radios, amateur radio, AM and FM radio broadcast, 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 the Naída CI is used exceeds the applicable RF compliance level above, the Naída CI
should be observed to verify normal operation.
c. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Separation Distances between RF Communications Equipment and Naída CI M30
Recommended Separation Distances between Portable and Mobile RF Communications Equipment and
the Naída CI M30
The Naída CI is intended for use in an electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of the Naída CI can help prevent electromagnetic interference
by maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and the Naída CI 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)
d = 1.2√P < 800 MHz
d = 2.3√P ≥ 800 MHz
0.01
0.12
0.23
0.1
0.38
0.73
1
1.2
2.3
10
3.8
7.3
100
12
23