SI-TEX SVS-650
11
SVS-650 Introduction
How a Fish finder Works-
The
SVS-650
echo sounder consists of a transceiver display unit and a dual frequency transducer.
An electronic signal pulse is generated in the transmitter section of the display unit, and sent to the
transducer; this signal is converted into an ultrasonic pulse and is transmitted through the water until it
strikes an object or the bottom. The pulse is then reflected back, hits the transducer surface, and is
reconverted into an electronic signal by the transducer. Then it is amplified in the receiver section,
processed in the main logic section, and displayed, as an image on the LCD screen. This is exactly
the same as a medical ultrasound device that you might have seen in your Doctor’s office; the main
difference is that the SVS-650 operates at a much lower frequency then a medical ultra sound system.
When your boat travels from point A to point B (Picture 1), the system records the pulses received
back from the transducer installed on your boat as a cross-sectional view in the water.
(Picture 2) indicates a cutaway view under the water when your boat moves from A to point B.
The screen shows the latest scan data at the right side edge of the LCD Screen. After the next scan, the
previous data is moved to the left. In this way the SVS-650 assembles all of the recorded data into a
histogram of what has passed under your boat during the last minute or two.
Summary of Contents for SVS-650
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