Welby FTM394 Manual Del Usuario página 25

Electromagnetic compatibility USA
situations. Electromagnetism is affected by
absorption and reflection from structures,
objects and people.
a. Field strengths from fixed transmitters,
such as base stations for radio (cellular/cord-
less) telephones and land mobile radios, ama-
teur 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 con-
sidered. If the measured field strength in the
location in which the model FTM394 is used
exceeds the applicable RF compliance level
above, the model FTM394 should be observed
to verify normal operation. If abnormal per-
formance is observed, additional measures
may be necessary, such as reorienting or relo-
cating the model FTM394 .
b. Over the frequency range 150 kHz to 80 MHz,
field strengths should be less than 3V/m.
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