Separation Distances Between Rf Communications Equipment And Naída Ci Q90 - ab Naida CI Q90 User Manual

These guidelines may not apply in all situations. Electromagnetic propagation
NOTE:
is affected by absorption and reflection from structures, objects and people.
a Essential performance of the Naída CI Q90 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 Q90 is used exceeds the applicable RF compliance level above, the Naída CI Q90 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 Q90
Recommended separation distances between portable and mobile
The Naída CI Q90 is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the Naída CI Q90 can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the Naída CI Q90 as recommended below, according
to the maximum output power of the communications equipment.
Rated Maximum Output
Power of Transmitter
(w)
0.01
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.
These guidelines may not apply in all situations. Electromagnetic propagation
NOTE:
is affected by absorption and reflection from structures, objects and people.
RF communications equipment and the Naída CI Q90
0.1
1
10
Separation distance according to frequency of transmitter
d
= 1.2√P < 800 MHz
0.12
0.38
1.2
3.8
12
Naída CI Q90 Sound Processor User Guide
(m)
d
= 2.3√P ≥ 800 MHz
0.23
0.73
2.3
7.3
23
61