Theory of Operation

Your Humminbird LCR works on the basic principal of sonar. An electronic signal is generated within the control head of the unit. When coupled to the transducer, this signal is converted to an ultrasonic signal and is transmitted toward the bottom. The speed of the ultrasonic signal traveling through the water is approximately 4800 feet per second.

The signal travels through the water until it strikes an object or the bottom. At this instant it is reflected back, picked up by the transducer, reconverted to an electronic signal and is recorded on the display of the LCR.

The reading at the far right postion of the screen shows what is being passed over at that time. As new information is received, the old information is shifted to the left and the new information is added. The information is retained until it disappears from the left side of the screen. Figure 1 illustrates a typical display.

One of the unique features of your LCR is the Split Screen Zoom with Total Screen Update. Figure 1 shows a Split Screen Zoom display with the full depth range information on the right and the expanded view on the left. The Total Screen Update feature is explained in detail later, but basically with Zoom the Total Screen Update allows you to zoom in on an area even after you have passed by it. The display resolution on the expanded portion of the screen is as good as 3 inches per dot, giving you exact detail while still viewing the full depth range information on the right.

The display used on the LCR is a Liquid Crystal Display. The material in the display is a liquid that can be aligned such that it either "blocks" light or it lets light pass through. This "blocking" of light is what makes the black dots on the screen.

Since the LCR's display depends on light passing through it to make the images, increasing the light source will make it easier to see. This is why your LCR can be seen so well in direct sunlight. You will also notice that the display can be seen better at certain angles. The LCR mounting has been designed for tilting and pivoting so that you can easily maintain a good angle for viewing. Another characteristic of an LCD display is that you may find that some polarized glasses might effect the view by causing a rainbow prism to appear. This condition can possibly be improved by a slight adjustment in tilt.

SPLIT SCREEN OPERATION

The LCR 8000's split screen feature will allow you to make sideby-side comparisons. You will be able to split the screen and compare the actual, full depth scale information with three functions

(1) zoom, (2) bottom lock or (3) screen memory.

Use of the split screen capabilty is very easy. Whenever any of the three functions is activated the screen automatically splits, with the right half of the screen showing the current full depth scale information and the left half showing zoom, bottom lock, or screen memory. (See Figure 14). NOTE: If zoom or bottom lock is on when recalling a memory screen, then the memory screen will be on the right so that it can be compared to zoom or bottom lock.

LCR 8000D, LCR 8000 specifications

The Humminbird LCR 8000 and LCR 8000D are advanced fish finders designed for avid anglers who seek precision and reliability on the water. These devices are known for their high-performance features that enhance the fishing experience, making it easier to locate fish and understand underwater structures.

One of the standout characteristics of the LCR 8000 series is its large display, which typically measures 8 inches. The screen is designed to offer exceptional clarity and visibility, even in bright sunlight. With a resolution of 640 x 480 pixels, users can expect sharp images and detailed sonar readings. The LCR 8000D version takes this a step further with additional features such as a split-screen display, allowing users to monitor multiple functions simultaneously.

These models integrate advanced sonar technology, including dual-beam sonar capabilities. The LCR 8000 and 8000D can operate on both narrow and wide beam frequencies, enabling anglers to cover more water and get a more comprehensive view of underwater environments. The fish symbol identification feature provides an intuitive way for users to discern between fish and other objects, enhancing their chances of a successful catch.

Another notable feature is the AutoZoom capability, which automatically adjusts the viewing area to focus on the depth range where fish are most likely to be present. This real-time information helps users make quick decisions about where to cast their lines.

Additionally, the LCR 8000D offers an integrated temperature sensor, providing real-time water temperature readings that can be crucial for understanding fish behavior. The ability to record sonar logs is another innovative aspect, allowing users to review their fishing trips and analyze data for future outings.

Both models boast rugged construction suitable for various weather conditions, ensuring durability on the water. The user-friendly interface and straightforward controls make it accessible for both seasoned professionals and recreational anglers alike.

In conclusion, the Humminbird LCR 8000 and LCR 8000D represent a significant advancement in fish finding technology, combining powerful sonar capabilities, user-friendly design, and robust construction. These devices are designed to elevate the fishing experience, enabling users to optimize their time on the water and increase their chances of success.