How To Adjust Beam Width - Furuno FSV-85 Operator's Manual

2. HORIZONTAL MODE
Sidelobe suppression B
For greater sidelobe suppression,
use [Sidelobe Sup. B]. The setting
range is 1 to 5. The larger the setting
value, the more the sidelobe is sup-
pressed; however, the width of the
beam increases thus resolution is
lower. The negative value setting (-5
to -1) is effective for reducing the ef-
fects of screw noise.
The area in which to suppress side-
lobes with [Sidelobe Sup. B] can be
set with [Sidelobe Dir1] and [Sidelobe Dir2]. The setting range is 0°≤ [Sidelobe Dir1]
≤ [Sidelobe Dir2] ≤180°, symmetrical in port-starboard directions. An area can be set
when [Sidelobe Sup. B] is 0 - 5. In this case the settings of Dir1 and Dir2 are gray.
2.10

How to Adjust Beam Width

The width of the horizontal beam can be adjusted from the [Beam Width] 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 [H1] or [H2] tab.
4. Select [Beam Width] then push the left-click button.
5. Select the item to adjust then push the left-click button.
2-20
Area in which SIDELOBE
SUP. B works (port-
starboard symmetrical)
Sidelobe bearing 1
Sidelobe bearing 2
Echo from screw
noise