Humminbird 4000 User Guide
USING THE LCR 4000
OPERATIONAL INSTRUCTIONS
You may also manually change the depth scale by pressing the depth set button. Each
time this button is depressed, the range is decreased by one setting. For example, if
you are on the 0-30 ft scale, pressing the depth set button once will change the scale to
0-15 ft. Pressing it again will change the scale to 0-120 ft.
Note: Should you attempt to change a depth scale which is less than the actual bottom
depth, the computer will automatically change the depth scale back to the proper
position. For example, if you are in 40 feet of water and you change the depth scale to
30 feet, the computer will automatically change back to the 60 foot scale.
Remember, in the manual mode (see paragraph 4 below) the automatic range changer
is not active.
The depth range is always displayed at the bottom of the LCR display.
The LCR4000 has four depth ranges, 0-15’, 0-30’, 0-60’, and 0-120’. The graduated
depth scales down the left and right of the display will identify the proper depth based
upon the range you are on at the time. On the 0-15’ scale, each line represents a one
foot increment. On the 0-30’ scale a two foot increment, on the 0-60’ scale, a five foot
increment, and on the 0-120’ scale, a ten foot increment.
Remember that because of the LCR4000’s Total Screen Update feature, information is
automatically being put into memory in smaller increments (pieces) than is being
displayed on the normal depth scales (see explanation of Total Screen Update earlier in
manual). This means, for example, that even though you are in the 0 to 120 ft scale,
when you change to the 0 to 15 ft scale the information is displayed just as if you had
been on the 0 to 15 ft scale all along. No information or resolution is lost.
3. Light: Depress the light “On/Off” switch to activate the display light for night or low
light conditions. The light is turned off by again depressing the ''On/Off'' switch. When
using the night light you will notice that the viewing
automatically being put into memory in smaller increments (pieces) than is being
displayed on the normal depth scales (see explanation of Total Screen Update earlier in
manual). This means, for example, that even though you are in the 0 to 120 ft scale,
when you change to the 0 to 15 ft scale the information is displayed just as if you had
been on the 0 to 15 ft scale all along. No information or resolution is lost.
3. Light: Depress the light “On/Off” switch to activate the display light for night or low
light conditions. The light is turned off by again depressing the ''On/Off'' switch. When
using the night light you will notice that the viewing
angle, or best viewing position is
different than during daylight operation. Tilt the unit back until you find the best angle for
night viewing.
4. Sensitivity
Automatic Mode- Each time the unit is turned on, the automatic feature is on. In the
automatic mode the sensitivity is adjusted automatically to give a good return and the
correct depth range is selected. The word Auto will appear in the upper right hand
corner of the display any time the unit is in the automatic mode. The sensitivity bar at
the top of the screen will increase or decrease automatically indicating the amount of
sensitivity being used. In deeper water or soft bottom conditions this bar will increase,
night viewing.
4. Sensitivity
Automatic Mode- Each time the unit is turned on, the automatic feature is on. In the
automatic mode the sensitivity is adjusted automatically to give a good return and the
correct depth range is selected. The word Auto will appear in the upper right hand
corner of the display any time the unit is in the automatic mode. The sensitivity bar at
the top of the screen will increase or decrease automatically indicating the amount of
sensitivity being used. In deeper water or soft bottom conditions this bar will increase,