Lowrance HDS-9 Gen3 Operators Manual US - Page 67

Stop sonar, Advanced Sonar options, Noise rejection, Surface clarity, Scroll speed

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Adjusting Sensitivity and Colorline Select the Sensitivity or Colorline menu options in the Sonar menu and adjust them by dragging the bar vertically or by using the Cursor keys. Ú Note: Minor adjustments can be made by tapping above or below the slider bar or pressing the Cursor keys. Ú Note: When the Sensitivity or Colorline slider bar is displayed, it is automatically selected and adjustments can be made up/down with the Cursor keys. Stop sonar Select the Stop sonar menu option to stop the sonar from pinging. Use the stop sonar option anytime you want to disable the sonar but not power off the unit. Advanced Sonar options The Advanced option is only available when cursor is not active. Noise rejection Signal interference from bilge pumps, engine vibration and air bubbles can clutter the image. The noise rejection option filters the signal interference and reduces the on-screen clutter. Surface clarity Wave action, boat wakes, and temperature inversion can cause onscreen clutter near the surface. The surface clarity option reduces surface clutter by decreasing the sensitivity of the receiver near the surface. Scroll speed You can select the scrolling speed of the Sonar image on the screen. A high scroll speed updates the image fast, while a low scroll speed presents a longer history. Ú Note: In certain conditions it may be necessary to adjust the scroll speed to get a more useful image. Such as Sonar | HDS Gen3 Operator Manual 67

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Adjusting Sensitivity and Colorline
Select the Sensitivity or Colorline menu options in the Sonar menu
and adjust them by dragging the bar vertically or by using the
Cursor
keys.
Ú
Note:
Minor adjustments can be made by tapping above or
below the slider bar or pressing the
Cursor
keys.
Ú
Note:
When the Sensitivity or Colorline slider bar is
displayed, it is automatically selected and adjustments can
be made up/down with the
Cursor
keys.
Stop sonar
Select the
Stop sonar
menu option to stop the sonar from pinging.
Use the stop sonar option anytime you want to disable the sonar
but not power off the unit.
Advanced Sonar options
The Advanced option is only available when cursor is not active.
Noise rejection
Signal interference from bilge pumps, engine vibration and air
bubbles can clutter the image.
The noise rejection option filters the signal interference and reduces
the on-screen clutter.
Surface clarity
Wave action, boat wakes, and temperature inversion can cause
onscreen clutter near the surface. The surface clarity option reduces
surface clutter by decreasing the sensitivity of the receiver near the
surface.
Scroll speed
You can select the scrolling speed of the Sonar image on the screen.
A high scroll speed updates the image fast, while a low scroll speed
presents a longer history.
Ú
Note:
In certain conditions it may be necessary to adjust
the scroll speed to get a more useful image. Such as
Sonar
| HDS Gen3 Operator Manual
67