Furuno CSH-5L/CSH-8L Choosing Beamwidth, Deleting Weak Echoes, Echo Averaging, Vertical beamwidth

2. FINE TUNING THE SONAR PICTURE

2.6Choosing Beamwidth

2.6.1Horizontal beamwidth

If you wish to have better bearing discrimination (ability to distinguish two closely located targets at the same range and different bearings) for fish schools and also wish to examine the contour of bottom, set HOR BEAMWIDTH to NARROW, on the SONAR menu.

2.6.2Vertical beamwidth

For better bearing discrimination in the vertical direction, set VER BEAMWIDTH to NARROW, on the SONAR menu.

2.7Deleting Weak Echoes

You can remove weak echoes to clear the picture. Echoes are deleted by strength so this feature is useful for observing only large fish schools or suppressing interference.

1.Press the [MENU] key to open the menu.

2.Use the [RANGE] control to choose [MENU MODE] at the top of the screen.

3.Use the [GAIN] control to choose SONAR.

4.Use the [RANGE] control to choose DELETE COLOR.

5.Use the [GAIN] control to choose setting. The setting range is 0-10 and the higher the number the stronger the echo that will be erased.

6.Press the [MENU] key to close the menu.

2.8Echo Averaging

You may adjust echo afterglow to follow echo movement. The higher the setting the longer the afterglow remains on the screen.

1.Press the [MENU] key to open the menu.

2.Use the [RANGE] control to choose [MENU MODE] at the top of the screen.

3.Use the [GAIN] control to choose SONAR.

4.Use the [RANGE] control to choose ECHO AVERAGE.

5.Use the [GAIN] control to choose setting. The setting range is 0 (OFF) to 3 and the higher the setting the longer echoes remain on the screen.

6.Press the [MENU] key to close the menu.

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