Immunity Test
IEC 60601
Test level
Compliance level Electromagnetic
environment –
guidance
a. Field strengths from fixed transmitters, such as base stations
for radio (cellular/cordless) telephones and land mobile radios, amateur ra-
dio, AM and FM radio broadcast and TV broadcast cannot be predicted the-
oretically 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 DREAM™ series
hearing aid is used exceeds the applicable RF compliance level above, the
DREAM™ series hearing aid should be observed to verify normal operation.
If abnormal performance is observed, additional measures may be necessa-
ry, such as re-orienting or re-locating the DREAM™ series hearing aid.
b. Over the frequency range 150 kHz to 80 MHz, field strengths should be
less than 3 V/m.
Recommended separation distances
Recommended separation distances between portable and mobile RF com-
munication equipment and the DREAM™ series hearing aids.
The DREAM™ series hearing aids are intended for use in the electromagnetic
environment in which RF disturbances are controlled. The customer or the
user of the DREAM™ series hearing aid can help prevent electromagnetic in-
terference by maintaining a minimum distance between portable and mo-
bile RF communications equipment (transmitters) and the DREAM™ hearing
aids as recommended below, according to the maximum output power of
the communications equipment.
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Summary of Contents for D-m CB
Page 1: ...USER INSTRUCTIONS THE WIDEX DREAM FAMILY D m CB model Behind the ear...
Page 5: ...EC directives 47 FCC and IC statements 47 SYMBOLS 51 5...
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