Eagle Electronics SeaFinder 480DF - Manual (Page 69)

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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.
To change Ping Speed:
1. From the Sonar Page, press
MENU |
↓ to
P
ING
S
PEED
| ENT .
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
EXIT .
To adjust Sensitivity:
1. From the Sonar Page, press
MENU | ENT .
2. The Sensitivity Control Bar appears. Press
↓ to decrease sensitivity;
press
↑ to increase sensitivity. When it's set at the desired level, press
EXIT . (When you reach the maximum or minimum limit, a tone sounds.)
To turn off HyperScroll:
1. From the Sonar Page, press
MENU |
↓ to
P ING S PEED
| ENT .
2. The Ping Speed Control Bar appears. Press
↓ to decrease ping speed
to 50 percent. When it's set at the desired level, press EXIT .
When you boost ping speed and switch into HyperScroll, the width of
the FasTrack bar graph display doubles in width at the right side of the
screen. The allows you to better see the virtually instantaneous sonar
returns, just as you would on a flasher sonar unit. For more
information on FasTrack, see it's entry in this section.