Recommendation; Operating Theory; Operating Notes - Icom iC-R30 Basic Manual

■ Recommendation

CLEAN THE RECEIVER THOROUGHLY
IN A BOWL OF FRESH WATER after
exposure to saltwater, and dry it before
operating. Otherwise, the receiver's keys,
switches, and controllers may become
unusable, due to salt crystallization, and/or
the charging terminals of the battery pack
may corrode.
NOTE: If the receiver's waterproof
protection appears defective, carefully
clean it with a soft, damp (fresh water)
cloth, then dry it before operating.
The receiver may lose its waterproof
protection if the case, jack cap, or
connector cover is cracked or broken, or
the receiver has been dropped.
Contact your Icom distributor or your
dealer for advice.
vii

■ Operating theory

Electromagnetic radiation, which has
frequencies of 20,000 Hz (20 kHz*) and
above, is called radio frequency (RF)
energy because, it is useful in radio
transmissions. The IC-R30 receives RF
energy from 0.100 MHz* to 3304.99999
MHz and converts it into audio frequency
(AF) energy which in turn actuates a
loudspeaker to create sound waves.
AF energy is in the range of 20 to 20,000 Hz.
* kHz is an abbreviation of kilohertz or 1000
hertz, MHz is abbreviation of megahertz
or 1,000,000 hertz, where hertz is a unit
of frequency.

■ Operating notes

The IC-R30 may receive its own oscillated
frequency, resulting in no reception or only
noise reception, on some frequencies.
The IC-R30 may receive interference
from extremely strong signals on different
frequencies or when using an external
high-gain antenna.