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Sensitivity Time Control (STC). Electrical interference is screened out to an automatic digital noise
reject feature.
The uppermost readout of the display is the sensitivity bar. (See Figure 11) You will notice this bar
increasing or decreasing based upon the amount of sensitivity being used. It is possible to use this
feature to interpret bottom texture. A harder bottom will require less sensitivity thus a narrower series of
sensitivity bars displayed. A softer bottom displays an increased number of bars due to the increased
sensitivity needed to give an adequate return.
To turn the unit off, simply depress the Power "Off" button.
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.
Depth: Since the LCR 1000 is fully automatic, the proper depth range is found as soon as the unit is
turned on. As you move into deeper water and the bottom goes off screen, the next deeper depth range
will automatically be activated. In order to return to a shallower depth range, you must manually
depress the depth "set" button. Each time this button is depressed, the range is decreased by one
setting. Thus, this control will work in the opposite direction from the automatic depth advance.
Note: Should you attempt to change to 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.
The depth range is always displayed at the bottom of the LCR display. The LCR 1000 has four depth
ranges, 0-15 feet, 0-30 feet, 0-60 feet, and 0-120 feet. The graduated depth scales down the left and
right side of the display will identify the proper depth based upon the range you are on at the time. On
the 0-15 foot scale, each line represents a one foot increment. On the 0-30 foot range a two foot
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