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3. VERTICAL MODE
3-8
V-SCAN SETTING
TX PULSE LENGTH
TVG-NEAR
: 7
: 0
TVG-MEDIUM
TVG-FAR
NOISE LIMITER
AGC
ECHO AVERAGE
: 0
: 0
: 2
: 0
MENU QUIT
INT REJECT
: 0
: 0
QUIT
OTHERS...
REVERBERATION : 0
FREQ SHIFT : 0
2ND AGC : 0
NEAR AGC : 0
BOTTOM SUPPRESS : 0
SIDELOBE SUPPRESS : 0
V-SCAN SETTING menu
3. Select TVG-NEAR with the trackball and press the [MENU] key.
QUIT
CANCEL
TVG setting dialog box
4. Use the trackball to select S (raise setting) or T (lower setting) and press
the [MENU] key. The setting range is –5 to 5. The higher the setting the
further the TVG works.
5. Select QUIT and press the [MENU] key.
6. Repeat steps 3 and 4 to set TVG-MEDIUM and TVG-FAR.
When sea surface reflections or plankton layers disturb the picture, decrease
appropriate TVG option by one or two steps.
7. Select QUIT at the top of the menu screen and press the [MENU] key to
close all menus.