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At right, Scroll Speed menu at default 60 percent setting. At left, Scroll
Speed menu, with unit set to HyperScroll mode.
If you are running fast, try a HyperScroll setting of 80 to 100 percent.
When using HyperScroll, you may also need to manually decrease the
sensitivity for best performance. Depending on water conditions, Hy-
perScroll may cause a second bottom echo and large amounts of clutter
to appear on the screen. If this occurs, just decrease the sensitivity to a
level that eliminates the clutter. When you turn HyperScroll off, you
can return to your original sensitivity level.
Adjust scroll speed by pressing
MENU
until
S
CROLL
S
PEED
appears. Press
UP ARROW
to increase it and press
DOWN ARROW
to decrease it. Press
PWR
to clear the menu.
To return to the original setting, repeat the above steps, but use the
arrow keys to set the speed at 60 percent before clearing the menu.
NOISE REJECT and ASP (Advanced Signal Processing)
The ASP (Advanced Signal Processing) feature is a noise rejection
system built into the sonar unit. It constantly evaluates the effects of
boat speed, water conditions and electrical interference and automati-
cally gives you the best display possible under most conditions.
ASP is an effective tool in combating noise. In sonar terms, noise is any
undesired signal. It is caused by electrical and mechanical sources such
as bilge pumps, engine ignition systems and wiring, air bubbles passing
over the face of the transducer, even vibration from the engine. In all
cases, noise can produce unwanted marks on the display.
44


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