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Фрагмент инструкции
Increasing the sensitivity (+1 through +5) enables the unit to display the information from progressively smaller sonar returns. By decreasing the sensitivity (-1 through -5), the unit effectively filters small sonar returns. In murky or muddy water, it is often helpful to reduce the sensitivity. This prevents the display from being cluttered with sonar returns from debris or suspended particles. In very clear or very deep water, it may be helpful to increase the sensitivity since even the smallest sonar return may be of interest to the user. USING MENU FUNCTIONS High Sensitivity Sensitivity at “0” To adjust Sensitivity, press MENU repeatedly until the Sensitivity heading is displayed. When the Sensitivity menu appears, use the UP ARROW to increase the sensitivity, or the DOWN ARROW to reduce sensitivity. To sequence through the available settings, press and hold either ARROW button. Release the button at the setting you want to select. After an adjustment is made, the menu disappears and the new setting is in affect. If additional time is needed to study a menu, press and hold the MENU button and the menu will remain on-screen indefinitely. If you need to make an additional adjustment, press the UP ARROW or DOWN ARROW button. Depth Range. The Depth Range function controls the vertical distance displayed on the graphic area of the display. There are nine 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', 0–120', 0–180', 0–240', 0–360', 0–480', Low Sensitivity and 0–600' are available. In the metric selection , ranges of 0–5, 0–10, 0–20, 0–40, 0–60, 0–80, 0–110, 0–150, and 0–185 metres are available. The range that positions the bottom depiction closest to the bottom of the screen, will best utilize the available display resolution. The 450TX automatically adjusts the depth range depending on the depth of the water. The unit tries to maintain the bottom depiction about ... down the total range (for example, in 6m (20') of water, the 0-10m (0-30') range would be selected). This provides the best display resolution and therefore the best target separation possible. USING MENU FUNCTIONS The Depth Range can be adjusted Press MENU repeatedly until the Depth Range menu is visible. Two options are available: Auto and Manual. The manual setting enables you to adjust current depth range setting. 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 Using manual Depth Range control, you can view sonar information from the area near the surface in great detail. To return to automatic Depth Range control, press the MENU button until the Depth Range menu appears on-screen and use the UP ARROW to select AUTO. Zoom. The 450TX uses a greatly enhanced Zoom capability called “TruZoom” which offers expanded information on a select area of sonar information. Zoom is similar to Depth Range because it controls the range of information displayed on screen. Zoom, however, allows selection of ranges beneath the surface so any area of water between the surface and the bottom can be enlarged to provide more detailed information. By using the full display to show a small area of coverage, the effective display resolution is increased, and the unit’s ability to separate close targets is enhanced. The Zoom ranges available are dependent on the current depth range. In the 5m (15') depth range, TruZoom displays a range equal to one half the current depth range. In the 10m (30'), 20m (60'), 40m (120'), 60m (180'), 80m (240'), 110m (360'), 150m (480') and 185m (600') Depth Range USING MENU FUNCTIONS depth ranges, TruZoom displays a range equal one fourth the current depth range. The box at the right side of the screen outlines the area to be zoomed. The 450TX shows Zoom range in conjunction the full depth range. The Zoom range is shown the left side of the screen and full range information is shown on the right side of the display. The area which is being enlarged by Zoom is indicated by the box. Zoom can either operate automatically, in which the Zoom range is constantly adjusted to show the bottom, or manually, in which the user controls the location of the Zoom range. “Automatic” Zoom is especially helpful when looking for structure or bottom detail. The Upper Zoom Limit “Automatic” Zoom keeps the bottom in view even in quickly changing terrain. “Manual” Zoom provides detailed information of any area from the surface to the bottom. In “Manual” Zoom, the Zoom range does not move as the terrain changes. To operate Zoom, press MENU repeatedly until the Zoom menu is on- Lower Zoom Limit screen. Three options are available: “Off” (Factory Setting), “Auto” (Automatic bottom tracking Zoom), and “Manual” (User controlled Zoom range). Press the DOWN ARROW once to highlight Auto or twice to highlight Man...