Furuno FSV-85, Operator'S Manual

Page: 99 / 184

4. SLANT MODE
4-11
3. Press the H/V/S key to select the [S] tab.
4. Select [TX Pulse Length] then push the left-click button.
5. Select
S or T then push the left-click button to adjust the setting. The setting
range is 0-9. The higher the setting, the longer the pulse length.
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.
4.9 How to Suppress Bottom and Sea Surface Re-
flections in Shallow Waters
In shallow fishing grounds with hard or rocky bottom, bottom reflections often interfere
with wanted fish echoes and they can not be eliminated sufficiently with the aforemen-
tioned TVG and AGC functions, especially when the TILT is set to a larger angle in
order to track schools of fish approaching within 400 m. In such cases try to reduce
the output power by adjusting the Tx output instead of turning down the gain. The pic-
ture becomes clearer when output power is reduced rather than when the GAIN is de-
creased as illustrated below.
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.
Fish echo
Fish echo
weakened
Fish echo
INCORRECT
METHOD
CORRECT
METHOD
Reduce TX POWER
with GAIN kept
constant
TVG and AGC
adjusted with
TX POWER kept high