Teleflex TFX128, Руководство по эксплуатации

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USING THE 128 SERIES
HOW SONAR WORKS
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HOW SONAR WORKS
Your Teleflex unit uses sonar to
locate and define underwater
objects, define the bottom terrain, as
well as determine distance.
Sonar technology is based on sound
waves. Your Teleflex unit sends out a
sound wave signal. With this signal it
determines distance by measuring
the time between the transmission of
the sound wave and when the sound
wave is reflected off an object. Your
Teleflex uses the reflected signal to
interpret location, size and
composition of an object.
Sonar is very fast. A sound wave can travel from the surface to a depth
of 600' (185m) and back again in less than
¹⁄₄
of a second. It is unlikely
that your boat can "outrun" this sonar signal.
The 128 is a single frequency, single beam unit, and generates a 20°
symmetrical cone of sonar coverage at 200kHz. The 20° coverage shows
excellent bottom detail with a greater depth capability than wider beams.
The sonar return shows the most current information at the right of the
screen and draws a history of the information as it scrolls across to the left.
Actual depth capability depends on factors such as bottom hardness,
water conditions, and transducer installation. Units will typically read to
deeper depths in fresh water than in salt water