Stop Sonar; Noise Rejection; Advanced Sonar Options; Surface Clarity - Lowrance HDS Gen3 Operator's Manual

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 the 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.
Note:
Ú In certain conditions it may be necessary to adjust
the scroll speed to get a more useful image. Such as
adjusting the image to a faster speed when vertically
fishing without moving.

Ping speed

Ping speed controls the rate the transducer transmits the Sonar
signal into the water. By default, the ping speed is set to max. It may
be necessary to adjust the ping speed to limit interference or to
adjust for specific fishing conditions.
Sonar | HDS Gen3 Operator Manual
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