Eagle Electronics FISHEASY 2T - Manual (Page 46)

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If you are at anchor, ice fishing or fishing from a dock, experiment with
a chart speed of 20 percent. If you are drifting slowly, try a chart speed
of 40 percent. When you are stationary and a fish swims through the
sonar signal cone, the image appears on the screen as a long line in-
stead of a fish arch. Reducing the chart speed may result in a shorter
line that more closely resembles a regular fish return.
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.