Widex TV-DEX, User Instructions, Page: 57 / 76

a . 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 TV-DEX is used exceeds the applicable RF compliance level
above, the TV-DEX should be observed to verify normal operation . If abnormal
performance is observed, additional measures may be necessary, such as re-
orienting or re-locating the TV-DEX .
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
communication equipment and the TV-DEX.
The TV-DEX is intended for use in the electromagnetic environment in which
RF disturbances are controlled. The customer or the user of the TV-DEX can
help prevent electromagnetic interference by maintaining a minimum dis-
tance between portable and mobile RF communications equipment
(transmitters) and the TV-DEX as recommended below, according to the
maximum output power of the communications equipment.
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