Advanced Options - Lowrance HDS PRO Operator's Manual

Advanced options

The Advanced menu 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 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 adjusting the
image to a faster speed when vertically fishing without moving.
Ping speed
Ping speed controls the rate the transducer transmits the 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.
Manual mode
Manual mode is an advanced user mode that restricts digital depth
capability, so the unit only processes sonar signals in the selected
range. This allows the display to continue smooth scrolling if the
bottom depth is out of transducer range. When the unit is in
manual mode, you might not receive any depth readings, or you
might receive incorrect depth information.
Sonar | HDS Pro Operator Manual
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