If a setting limit is reached, the ARROW symbol attached to the menu appears to be hollow which indicates that the related button has no further function. Also, the audible "error"

consisting of multiple chirps will be heard.

After an adjustment is made, the menu disappears and the new sensitivity setting begins to affect new sonar information as it flows onscreen. If additional adjustment is needed, the UP ARROW or DOWN ARROW can be pressed without having to first press MENU.

Depth Range

The Depth Range function controls the vertical distance displayed on the graphic area of the display. There are 9 different depth ranges available. The top of the range is always 0, or the surface of the water. Ranges of 0-15', 0-30', 0-60', 0120', 0-180', 0-240', 0-360', 0-480', and 0- 600' are available. In the metric version, ranges of 0-5, 0-10, 0-20, 0-40, 0-60, 0-80, 0-110, 0-150, and 0-185 meters are available. The range which positions the bottom depiction closest to the bottom of the graphic area of the display, will best utilize the available display resolution.

The 100SX automatically adjusts the depth range depending on the depth of the water. The unit tries to maintain the bottom depiction about 2/3 down the total range (for example, in 20'

(6m) of water, the 0-30' (0103) range would be selected). This provides the best display resolution and therefore the best target separation possible.

The Depth Range can be adjusted manually. Press MENU repeatedly until the Depth Range menu is visible. The two options available are "Auto" (Factory Setting) and "Manual". Pressing the DOWN ARROW enables "Manual" depth range control and an additional menu will appear which allows the user to adjust the current depth range setting. If no further button is pressed, the current depth range is selected as the desired range and the unit returns to normal operation.

Using "Manual" Depth Range control, the user can view sonar information from the area near the surface in great detail. If a depth range other than the current range is desired, pressing the DOWN ARROW to highlight "Adjust" will allow selection of one of the 9 available ranges. Simply press and hold the UP or DOWN ARROW button to scan through the available options. If a setting limit is reached, the audible "error" or multiple chirps will be heard and no further adjustment is allowed.

When "Manual" range is used, the unit no longer adjusts the Depth Range to the most appropriate range for bottom display. Often, the bottom may not be visible on-screen. The digital depth readout always determines the depth of the bottom, even if it is not visible on-screen.

When a Depth Range is selected manually and the Depth Range menu is still active (most recently used), further

adjustment of the depth range can be achieved by simply pressing the appropriate UP or DOWN ARROW button. The button press will bring the Depth Range menu on-screen and allows immediate adjustment of the range.

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Humminbird 100SX manual
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100SX specifications

The Humminbird 100SX is a versatile and user-friendly fish finder designed for anglers seeking an efficient and reliable tool for locating fish and navigating waterways. This compact device combines advanced technology with an intuitive interface, making it an ideal choice for both novice and experienced fishermen.

One of the standout features of the Humminbird 100SX is its wide-spectrum sonar technology. Utilizing dual-beam sonar, the 100SX provides exceptional detail and clarity in underwater imaging, allowing users to detect fish and structure beneath the surface with ease. The device can operate at multiple frequencies, ensuring optimal performance in various fishing environments. This dual-beam capability enables a wider coverage area, enhancing the chances of locating schools of fish.

The 100SX comes equipped with a 4-inch grayscale display that boasts a high-resolution screen, providing crisp visuals and clear readings even in diverse lighting conditions. This easy-to-read display helps anglers monitor underwater activity and water depth, making it easier to track fish movements and identify potential hotspots.

Additionally, this fish finder includes a built-in fish alarm feature, alerting users when fish are detected within the designated depth range. This handy function allows for a more efficient fishing experience, keeping anglers focused on their catch. The 100SX also features a deep-water capability of up to 600 feet, providing ample range for both shallow and deep-water fishing expeditions.

Navigational aids are also a highlight of the Humminbird 100SX. The device is equipped with a precise and responsive GPS system, allowing users to mark waypoints and create custom routes. This feature is invaluable for returning to fishing spots or navigating unfamiliar waters, enhancing the overall fishing experience.

In terms of design, the Humminbird 100SX is built for durability and ease of use. Its robust construction ensures it can withstand the rigors of outdoor conditions while remaining lightweight and portable. Installation is straightforward, making it accessible for users of all skill levels.

Overall, the Humminbird 100SX is a reliable and effective fish finder that combines innovative sonar technology with practical features. Its ease of use, detailed imaging, and navigational capabilities make it a valuable tool for anglers looking to maximize their fishing success on the water. Whether you are a weekend warrior or a seasoned pro, the Humminbird 100SX is an excellent addition to any fishing setup.
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