Use Instructions

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 M90

Recommended Separation Distances between Portable and Mobile RF Communications Equipment and

the Naída CI M90

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

1.2

2.3

3.8

7.3

100

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

transmitter, where P is the maximum output power rating of the transmitter in watts (W) according to

the transmitter manufacturer.