the maximum or minimum setting is achieved, the unit will make a
“Chirping” sound indication a limit has been reached.
In the manual mode everything below the bottom is no longer
blacked out, therefore a second return or double echo can be displayed
if desired. (See Figure 13). Also, the hardness of the bottom can be
determined by the thickness of the bottom return. For example, a hard
or rock bottom will give a wider bottom return as compared to a soft or
muddy bottom. (See Figure 14).
Note: You will find the manual sensitivity control most useful when looking for
smaller targets such as smaller fish. In the automatic mode the computer might not be
using enough sensitivity to show smaller targets. At higher sensitivity settings more
targets will be seen. Therefore, you might want to use the automatic mode while
running and then use the manual mode for charting and finding fish.
You should also note that it is possible to have the sensitivity set too high such
that reflection off of suspended matter or air bubbles will begin to black out the display.
In the manual mode the depth scale does not change automatically (See
paragraph 2 under
Manual Mode).
To once again activate the automatic mode,
depress the Sensitivity Auto “On/Off” switch.
6. Display: Stop/Resume: Anytime during the operations of the LCR, the
operator may “freeze” the display by simply pushing the display
“Stop/Resume” button. This feature will aid in the learning and interpretation
of the signal on your LCR display by giving you time to study the display.
The “Stop/Resume” will not change any original settings when once again
activated. Then sensitivity and display speed
cannot be changed while the
display is stopped.
