Table of Contents
Advertisement
4. SLANT MODE
4. Select [TX/RX Power] then push the left-click button.
5. Select or then push the left-click button to adjust the setting. The setting
range is 0-9. The higher the setting, the greater the TX power.
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
How to Reject Sonar Interference and Noise
While observing the sonar picture, you may encounter occasional or intermittent noise
and interference. These are mostly caused by on-board electronic equipment, engine
or propeller noise, or electrical noise from other sonars being operated nearby.
4.10.1
How to identify the noise source
To eliminate noise effectively, you should first identify the noise source as follows:
1) Stop transmission on the [Test] menu; turn on [TX]. Turn on the power of all on-
board equipment one by one while observing the picture. If noise appears on the
sonar display, that equipment is emitting noise. Check the offending equipment's
ground and installation.
2) Run the boat at various speeds to check if the noise is speed dependent.
If neither of the above two steps has effect on the picture, adjust one of the following:
4.10.2
Change TX interval
When other sonars nearby are operat-
ing the same transmission interval as
that of own ship's sonar, rings of inter-
ference 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 or 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.
4-12
Interference
Tx interval high
Tx interval lowered
Advertisement
Table of Contents
