Furuno FSV-84 manual Adjusting the Gain

1. OPERATIONAL OVERVIEW

1.7Adjusting the Gain

The [GAIN] control adjusts receiver gain (sensitivity) for the horizontal, slant vertical modes. Adjust it so fish echoes are clearly displayed with minimal noise on the screen. Too high a gain setting not only displays excess noise and makes it difficult to discriminate wanted echoes but also causes bottom echoes to be painted in strong colors, resulting in echoes being masked by bottom reflections. Normally, set the control somewhere between positions 3 and 7.

1.If the horizontal and vertical modes are active, press the [HSV] key to show the range and gain indications of the mode you wish to adjust in yellow. Pressing the [HSV] key changes the range and gain indication in yellow between horizontal1 and horizontal2, or horizontal and vertical, alternately.

2.Adjust the [GAIN] control.

New gain setting is momentarily displayed in large characters at the top of each display. Gain is always displayed at the top right-hand corner of the horizontal display and bottom on the vertical 1 display.

Gain too low Gain proper Gain too high

Example of proper and improper gain settings on the horizontal display

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