Furuno CH-270 Operator's Manual page 35

To adjust TVG:
1. Press the [MENU] key to open the menu.
2. Press ▲ to choose MENU and then press ◄ or ► to choose HORZ.
MENU
TVG LEVEL
TVG DISTANCE
GAIN ADJUST
RES. COLOR
CLUTTER
TARGET KEY
LOCK MODE
AUTO TILT
: SELECT
3. Press ▲ or ▼ to choose TVG DISTANCE and then press ►. The following dialog box
appears.
TVG DISTANCE
GAIN
Hi
Lo
200 m
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
0
Setting
Meters 3
Feet 10
Passi/braza 2
Fathoms
２
COM1 COM2 HORZ
4.0
4.0
0
LOG
0
REVERSE
AUTO
OFF
: CHANGE MENU: END
HORZ menu
4.0
0.5 1.0 1.5 2.0
8 20 40 60
30 70 130 210
5 10 20 40
5 10 20 40
VERT ES PRESET
2.5 3.0 3.5 4.0
100 130 160 200
330 410 520 660
60 80 100 120
60 80 100 110
2. HORIZONTAL MODE
SYS
4.5 5.0 . . . . 10.0
250 320 . . . . 1000
820 1040 3280
150 180 600
140 170 550
2-15