4. SLANT MODE
4-14
5. Select S or T then push the left-click button to adjust the setting. The setting
range is 0-3. (Strong: 3→1→2 :Weak)
6. Select [Quit] on the setting box then push the left-click button to close the box.
7. Long-press the MENU/ESC key to close all menus.
4.10.4 Shift TX frequency
If the interference can not be suppressed by the interference rejector or change in TX
interval, shift the Tx frequency with the [Frequency] menu.
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 [Frequency] then push the left-click button.
5. Select [Freq Shift1] then push the left-click button.
6. Select S or T then push the left-click button to adjust the setting from the dialog
box. The setting range is -65 to 65.
7. Select [Quit] on the setting box then push the left-click button to close the box.
8. Long-press the MENU/ESC key to close all menus.
Note 1: In some cases the frequency can not be changed because of operating band-
width. In this case the frequency setting is grayed.
Note 2: The setting for [Freq Shift2] is valid when [Sidelobe Sup.A] is set between -3
and -1. Set [Freq Shift1] well apart from [Freq Shift2] to better suppress sidelobes.
4.10.5 Noise limiter
Weak, unwanted reflections, colored light-blue or green, appear when the water is
dirty, plankton layers exists, or due to ship noise. The noise limiter can reduce the ef-
fects of these unwanted reflections. Raising the setting causes unwanted reflections
to be displayed in colors of blue to background color.
1. Press the MENU/ESC key to show the main menu.
2. Select [Display Setting] then push the left-click button.
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