displayed on the normal 0 to 30, 0 to 60, 0 to 120, 0 to 240, or 0 to 480 foot scales. For example, on
the 0 to 60 foot scale each dot is equal to one foot of depth, but the computer is putting information into
memory such that each dot equals 3 inches.
If after reading this, you don’t understand all about how the LCR3000’s Total Screen Update
works, don’t worry. This important thing is that you understand how to use Total Screen Update. Read
on…
How to use Total Screen Update
This is the easiest part. Since the LCR’s computer is doing all the work, you will find the
LCR3000’s Total Screen Update very easy to use. There are two ways you will use Total Screen
Update:
1. When changing a depth scale, the LCR’s computer will automatically change or update the
entire screen to the new depth scale.
In Figure 12 the depth scale is being changed from the 0 to 30 foot
scale to the 0 to 60 foot scale.
Note that the display was changed to show the entire screen on the 0 to 60
foot scale.
Note that the display was change to show the entire screen on the 0 to 60
foot scale.
This Total Screen Update feature works when changing to shallower
scales, too. For example, suppose you are in the 0-480 foot scale but the
bottom depth is only 10 feet. When you change to the 3 to 30 foot scale, the
entire screen will look just as if you had gone over the area on the 3 to 30 foot
scale.
2. The other way that you will use the Total Screen Update is in operating the
LCR3000’s Zoom. Since the computer has stored in memory information for
0 to 480 feet in very small increments, you will be able to recall this
information from memory to get an expanded view of areas which you have
already passed over.
For example, if you go over some interesting structure or fish, you will be
able to zoom in for a closer look without going back over the area. Simply
activate the zoom and the information that is stored in memory will be
recalled and displayed on the screen.
The operation of the zoom function is explained in a later section.
OPERATIONAL INSTRUCTION FOR LCR3000
The hummingbird LCR3000 will operate fully automatic or manual at the discretion of the
operator. At the heart of the LCR3000 is a microcomputer which is making thousands of decisions
every second. With the LCR3000’s automatic features you will quickly and easily learn the basics of
operating your unit and after a couple of the trips on the water you’ll be operation the LCR3000 like an
expert. It is suggested that you familiarize yourself with each of the features and controls prior to
operating your LCR3000.
1. Power: To activate the unit, depress the Power “On” switch. The LCR3000 always comes
on in the automatic mode. In the automatic mode, the unit will find the bottom by varying
the sensitivity and selecting the proper depth range for a satisfactory return. Also, the
display below the bottom is blacked out to make the display easier to read.
To turn the unit off, depress the Power “off” switch.
2. Depth: In the automatic mode, the proper depth ranged is found as soon as the unit is turn
on. As you move into deeper water and the bottom goes off the screen, the next deeper
depth range will automatically be activated. Also, as water becomes shallower (when
bottom is about 10 dots from the top of screen) the depth range will automatically change to
