Lowrance LCX-18C Operation Instructions Manual page 80

However, when you are running at high speeds, or just want the fastest
possible screen update, you may want to use the HyperScroll feature.
When you change the Ping Speed to any setting greater than 50 per-
cent, the unit automatically enters HyperScroll mode.
These faster ping rates allow you to maintain a high-detail picture on
the screen, and the screen refresh rate and chart scroll speed can keep
pace with the boat as it moves quickly over the bottom terrain.
When using HyperScroll, you may also need to manually decrease the
sensitivity for optimum performance. Depending on water depth and
other conditions, HyperScroll may cause a second bottom echo to return
to the transducer during the next ping cycle, or sounding. This can result
in a large amount of clutter appearing 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.
At left, Sonar Menu with Ping Speed command selected.
Ping Speed Control Bar, right, at default setting.
To change Ping Speed:
1. From the Sonar Page, press
2. The Ping Speed Control Bar appears. Press ↑ to increase ping speed;
press ↓ to decrease ping speed. When it's set at the desired level, press
To adjust Sensitivity:
1. From the Sonar Page, press
2. The Sensitivity Control Bar appears. Press ↓ to decrease sensitivity;
press ↑ to increase sensitivity. When it's set at the desired level, press
. (When you reach the maximum or minimum limit, a tone sounds.)
EXIT
To turn off HyperScroll:
1. From the Sonar Page, press
2. The Ping Speed Control Bar appears. Press↓ to decrease ping speed
to 50 percent. When it's set at the desired level, press
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MENU P
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MENU ENT
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MENU P
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S ENT
PEED
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PEED
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EXIT
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EXIT