Humminbird 343c Operation Manual page 69

Transducer: The transducer mounts on the boat and is in contact with the water. It
converts the electrical energy from the transmitter into sound energy, forming the
sonar beam. Internally, the transducer consists of one or more piezo electric disks
that expand by very minute amounts to create the sound wave. This element also
works in reverse, converting the returned sound energy back into an electrical signal
that the receiver interprets. Transducers are available for many specific mounting
applications for the boat, such as a transom mount, trolling motor mount, etc.
Humminbird® offers many sophisticated transducers, often with multiple piezo
electric elements designed to form specifically-shaped sonar beams, providing the
angler with superior tools for finding and catching fish. See Transmitter and SONAR.
Transmitter: The transmitter and receiver are matched parts of the sonar system
that send (transmit) and listen to (receive) the sonar signals, and work in
conjunction with the transducer. Humminbird® transmitters have an extremely fast
cycling design that can send signals up to 60 times per second, as well as produce
the varying levels of power output needed for different depths and conditions.
Additionally, the transmitter has the capability to create very precise sonar pulses
needed for a high degree of target separation. Humminbird® receivers are
extremely sensitive, but within a narrow "bandwidth" to discriminate against noise
from external sources. Additionally, the receiver offers a wide "dynamic range"
which provides the ability to receive very strong signals alternating with very weak
signals, without the strong signal overwhelming the weak signal. See Transducer
and Noise.
TripLog: TripLog is a Humminbird® feature that provides an on-screen counter for
Elapsed Time, Average Speed and Total Distance traveled, and requires a speed input
to activate the feature. TripLog appears on the Big Digits View, and can be reset to
zero through the TripLog menu.
TrueArch®: TrueArch® is a Humminbird® feature that provides true fish arches, as
opposed to artificial arches or symbols. Humminbird® units are capable of
producing fish arches due to the extremely sensitive DualBeam PLUS™ sonar
receiver with its wide 60° sonar beam. See Fish Arch.
Viewing Angle: Viewing Angle is an attribute of an LCD that characterizes visibility
of the display when viewing from off the central axis, such as when standing to the
side of the fishfinder. Wider viewing angles are better because the information
remains visible even when viewing from the side.
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