Furuno FCV-600L manual White Marker, Fine Adjustment of Gain in Dual-Frequency Operation

1.18 White Marker

The white marker functions to display a par- ticular echo color in white. For example, you may want to display the bottom echo (red- dish-brown) in white to discriminate fish ech- oes near the bottom. Note that the bottom must be displayed in reddish-brown for the white marker to function.

1.Press the MENU ESC Key.

2.Press ▲ or ▼ to select MARKER.

3.Press s to select WHITE MAKER

4.Press the MENU ESC Key.

5.Press ▲ or ▼ to select color to display in white. As you press ▲ or ▼ the arrow next to the color bar shifts and selected echo color is displayed in white.

WHITE MARKER

▲: UP

▼: DOWN

Figure 1-32 White marker display

←Arrow points to

color currently displayed in white.

1.19Fine Adjustment of Gain in Dual-Frequency Operation

The gain of both the 50 kHz and 200 kHz transducers can be adjusted individually on the User menu as follows:

1.Press the MENU ESC key.

2.Select GAIN ADJ 200kHz or GAIN ADJ 50kHz.

3.Press t or s to adjust gain.

4.Press the MENU ESC key.

Figure 1-33 Color bar when white

marker display is on

To turn the white marker function off, set the arrow below the weakest color in the color bar in step 5 of the above procedure.

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