Furuno CH-250 Manuel d'utilisateur télécharger pdf (Page 17)

1-7

1.7 Adjusting the Gain

The [GAIN] control adjusts the sensitivity of the receiver. Normally, the control is adjusted so

that the bottom echo is displayed in reddish-brown mixed with red. Initially set the gain between

“4” and “6” and then fine tune depending on fishing ground, etc.

Too Low Proper

Too High

Figure 1-5 How to adjust the gain

1.8 Basic Menu Operation

The menu, consisting of six menus, mostly contains items which once preset do not require

frequent adjustment. Below is the procedure for basic menu operation.

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

Note: Either PRESET (default setting) or SHORT-CUT appears between ES and SYS at

the top of the screen depending on the setting of CUSTOM KEY on the SYSTEM

SETTING 1 menu, and they set the function of the custom keys [1], [2], [3]. For

further details see pages 5-3 through 5-7.)

DELETING TRACK NO

WHITE MARKER OFF

SIG LEVEL OFF

COLOR 16

BKGD COLOR 2

: SELECT

: CHANGE MENU: END

COM1 HORZ VERT ES PRESET SYSCOM2

Figure 1-6 COM2 menu

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 117 118

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Furuno CH-250 Manuel d'utilisateur Page 17