This product is now discontinued
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83 / 200 kHz Sounder, 250 W Output
The A-Scope function displays the strength and depth of the echoes returned from each ultrasonic pulse. This screen can also be used for manually setting the gain and adjusting the signal strength for the white line or grayscale display on the Fish History and Zoom screens.Also, the FISH 4432 and 4433 offers an alternate view of the A-Scope data. History data (scrolling from right to left) is plotted against signal strength (vertical axis) to offer an isometric interpretation of bottom structure and fish targets.