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4.10.7
Echo average
When using the Auto Train function, [Auto Train Afterglow] on the [Picture Setting]
menu ([S] tab) adjusts echo afterglow - the amount of time an echo signal remains on
the screen.
When not using the Auto Train function, [Echo Average] on the [Picture Setting] menu
([S]tab) adjusts echo afterglow.
This feature can be useful for watching echo movement. The setting range is 0-7.
Setting between 1 and 3: Echoes are gradually displayed and afterglow remains on
the screen longer as the setting is increased.
Setting between 4 and 7: Echoes are quickly displayed and afterglow remains on the
screen longer as the setting is increased.
4.10.8
How to suppress sidelobes
False echoes produced by sidelobes may appear on the display depending on the dis-
tribution pattern of a school of fish and the positional relationship between it and a ma-
rine object (reef, etc.) and wake reverberation. To reduce these sidelobes, use
[Sidelobe Sup.] on the [TX/RX Setting] menu ([S] tab).
For normal suppression, use [Sidelobe Sup.A]. The setting range is -3 to 4 and 0 is
the default setting. The higher the value the greater the suppression. A minus value (-
3 to -1) provides increased suppression.
Note: When the setting for [Sidelobe Sup.A] is a negative value, [TX/RX Mode] is auto-
matically selected to [Alternative]. See "Display Setting Menu" on page 7-3 for details.
For greater sidelobe suppression, use [Sidelobe Sup.B]. For details see page 2-19.
4.11
How to Adjust Beam Width
The width of the horizontal beam on the S-display can be adjusted from the [Beam
Width] menu.
1. Press the MENU/ESC key to show he 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 [Beam Width] then push the left-click
button.
5. Select an item then push the left-click button.
Adjust the item as appropriate, referring to the description on the following page.
4. SLANT MODE
4-15
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