Furuno CH-250 manual Adjusting the Gain, Basic Menu Operation

1.7Adjusting 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

1.8Basic 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.)

MENU	COM1		COM2	HORZ VERT ES PRESET SYS
DELETING TRACK		NO
WHITE MARKER		OFF
SIG LEVEL		OFF
COLOR		16
BKGD COLOR		2

: SELECT : CHANGE MENU: END

Figure 1-6 COM2 menu

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