Furuno CH-250 manual To adjust TVG

To adjust TVG:
1. Press the [MENU] key to open the menu.
2. Press to select MENU and then press			to select HORZ.
	MENU	COM1 COM2	HORZ	VERT ES PRESET SYS
	TVG LEVEL	4.0
	TVG DISTANCE	4.0
	GAIN ADJUST	0
	RES. COLOR	LOG
	CLUTTER	0
	TARGET KEY	REVERSE
	LOCK MODE	AUTO
	AUTO TILT	OFF
	: SELECT	: CHANGE	MENU: END

Figure 2-15 HORZ menu

3. Press or to select TVG DISTANCE and press . The following dialog box appears.

TVG DISTANCE

4.0

Hi

Lo

200

4.Press or to adjust TVG distance between 3.0 and 5.0 (130-320 m). As a general rule, use a higher setting for low frequency transducer; a lower setting for high frequency transducer. The larger the figure the greater the distance at which TVG works. When you open the TVG dialog box the TVG line changes from solid to dashed and a solid line denotes current TVG setting.

TVG												. . . .	10.0
Distance	0	0.5	1.0	1.5	2.0	2.5	3.0	3.5	4.0	4.5	5.0
Setting
Meters	3	8	20	40	60	100	130	160	200	250	320	. . . .	1000
Feet	10	30	70	130	210	330	410	520	660	820	1040		3280
Passi/braza	2	5	10	20	40	60	80	100	120	150	180		600
Hiro	2	5	10	20	40	60	80	100	130	170	210	. . . .	660

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