Humminbird LCR 4000 Operation Manual page 22

USING THE LCR 4000
OPERATIONAL INSTRUCTIONS
Note: You will find the manual sensitivity control more 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 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's 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 and the digital
bottom depth is not displayed. To once again activate the automatic mode, depress the
Sensitivity Auto "On/Off" switch.
5. Display: Stop/Resume: Anytime during the operation 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" function will not change any original
settings when once again activated. The sensitivity and display speed cannot be
changed while the display is stopped.
If they are pressed, a chirping sound will indicate that these functions cannot be
changed while the display is stopped. All other functions, such as Zoom, Depth Scales,
Reverse and Forward, are active with the display stopped. When the "Stop/Resume"
button is pressed again the unit will resume reading at the immediate point at which the
boat is sitting on the water.
6. Display Reverse: Information that has gone off the display can be reversed back
onto the screen by using the Display Reverses feature. By pressing the Reverse button
information that had gone off the left side of the display can be seen again, that is, the
display will begin to shift to the right. When the Reverse button is pressed once, the
display will move one division to the right. If the button is held down the display will
move to the right as long as the button is held down.
Up to three full screens may be put back onto the display. Once three screens have
been reversed, a chirping sound will indicate that the limit has been reached.
7. Display Forward: This button moves or shifts the display to the left. This means that
the Forward button shifts the information in the opposite direction than does the
Reverse button.
Therefore, the Reverse button shifts the display to the right, and the Forward button
shifts the display to the left.