Eagle 640c 用户指南
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Sonar Page with Overlay Data turned on. This example shows Depth,
Water Temperature and Water Speed.
NOTE:
Some data types can be displayed in only one font size. If that is the
case, the Data Size box will not be displayed for that data type.
case, the Data Size box will not be displayed for that data type.
Ping Speed & HyperScroll
Ping Speed controls the rate at which the transmitter and transducer
broadcast sonar sound waves — pings — into the water. The unit has a
default ping speed of 50 percent. At normal boating speeds, this auto-
matically provides enough return echoes to refresh the screen and scroll
the chart at maximum chart speed.
broadcast sonar sound waves — pings — into the water. The unit has a
default ping speed of 50 percent. At normal boating speeds, this auto-
matically provides enough return echoes to refresh the screen and scroll
the chart at maximum chart speed.
However, when you are running at high speeds, or just want the fastest
possible screen update, you may want to use the HyperScroll
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.
cent, the unit automatically enters HyperScroll mode.
The faster ping rate allows you to maintain a high-detail picture on the
screen. The screen refresh rate and chart scroll speed can keep pace
with the boat as it moves quickly over the bottom terrain.
screen. The screen refresh rate and chart scroll speed can keep pace
with the boat as it moves quickly over the bottom terrain.