SONAR User Manual

2-14
To adjust TVG:
1. Press the [MENU] key to open the menu.
2. Press
to select MENU and then press to select 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 SYSCOM2 HORZ
LOCK MODE AUTO
AUTO TILT OFF
Figure 2-15 HORZ menu
3. Press
or to select TVG DISTANCE and press . The following dialog box appears.
4.0
200
TVG DISTANCE
Hi
Lo
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
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
Hiro 2 5 10 20 40 60 80 100 130 170 210 . . . . 660