4. SLANT MODE
4-13
4.10.2 Change TX interval
When other sonars nearby are oper-
ating the same transmission interval
as that of own ship's sonar, rings of
interference appears on the display.
To remove the rings from the screen,
do the following:
1. Press the MENU/ESC key to
show the main menu.
2. Select [TX/RX Setting] then push
the left-click button.
3. Press the H/V/S key to select the
[S] tab.
4. Select [TX Interval] then push the left-click button.
5. Select S or T then push the left-click button to change the setting. The setting
range is 0-9. The higher the setting, the longer the TX interval. [EXT KP] is for ex-
ternal KP synchronization; however, adjustment on the System menu is required.
See the installation manual.
6. Select [Quit] for the setting box then push the left-click button to close the box.
7. Long-press the MENU/ESC key to close all menus.
Note: When you operate the sonar with the following settings in shallow water, the sea
clutter from the previous transmission may appear in near range. To suppress the clut-
ter, reduce [TX Interval] by 2 or 3.
• Range: 60 to 200 m
• TX Pulse setting: 9
4.10.3 Interference rejector
This control is similar to the interference rejector on echo sounders and radars. It is
effective for rejecting random noise and sea surface reflections in rough sea condi-
tions. Set it so that noise is just eliminated. Do not use an unnecessarily high setting
since it may also reject small, wanted echoes.
1. Press the MENU/ESC key to show the main menu.
2. Select [Picture Setting] then push the left-click button.
3. Press the H/V/S key to select the [S] tab.
4. Select [Int Reject] then push the left-click button.
Interference
Tx interval high Tx interval lowered
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