Furuno CH-270 - Manual (Page 35)

2. HORIZONTAL MODE
2-15
To adjust TVG:
1. Press the [MENU] key to open the menu.
2. Press ▲ to choose MENU and then press ◄ or ► to choose HORZ.
TVG LEVEL 4.0
TVG DISTANCE 4.0
GAIN ADJUST 0
RES. COLOR LOG
CLUTTER 0
TARGET KEY REVERSE
: SELECT : CHANGE MENU: END
MENU COM1 VERT ES PRESET SYS COM2 HORZ
LOCK MODE AUTO
AUTO TILT OFF
HORZ menu
3. Press ▲ or ▼ to choose TVG DISTANCE and then press ►. The following dialog box
appears.
4.0
200 m
TVG DISTANCE
Hi
Lo
GAIN
4. Press ◄ or ► to set TVG distance between 3.0 and 5.0 (130-320 m) to decrease
amplification of echoes on short range. 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 change a TVG setting
(DISTANCE or LEVEL), the TVG line changes from solid to dashed; the solid line
denotes current TVG setting.
TVG Distance
Setting
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 . . . . 10.0
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
Fathoms 5 10 20 40 60 80 100 110 140 170 550