Furuno FCV-582L 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 [▲] and [▼] keys together until the display shown below appears.

WHITE MARKER

▲: UP

▼: DOWN

Figure 1-31 White marker display

2.Press the [▲] or [▼] key to select color to display in white. As you press the [▲] or [▼] key, the arrow next to the color bar shifts and selected echo color is dis- played in white.

← Arrow points to

color currently displayed in white.

1.19Fine Adjustment of Gain in Dual-Frequency Operation

The gain of the 50 kHz and 200 kHz trans- ducers can be adjusted individually on the User menu as follows:

1.Select MENU with the MODE control.

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

3.Press the [+] or [–] key to adjust gain.

Figure 1-32 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 2 of the above procedure.

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