Lowrance electronic LCX-15CT, LCX-15CI Transducer Frequency, Surface Clarity, Noise Rejection

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Transducer Frequency

This unit operates from both 200 kHz and 50 kHz. The default frequency is 200 kHz. It’s best for use in shallow water. The 50 kHz frequency is best for deep water, especially saltwater. Use the arrow keys to highlight the desired frequency, then press the ENT key to select it.

Surface Clarity

The markings extending downward from the zero line on the chart are called “surface clutter”. These markings are caused by wave action, boat wakes, temperature inversion, and more.

The surface clarity control reduces or eliminates surface clutter signals from the display. It does this by changing the sensitivity of the receiver, decreasing it near the surface and gradually increasing it as the depth increases. The maximum depth that the surface clarity control can affect is 75% of the selected depth range. For example, on a 0 - 60 foot range with surface clarity control set to high, surface clutter will be reduced down to 45 feet.

There are three levels of surface clarity available: low, medium, or high. It can also be turned off. The default level is low. To change it, highlight “Surface Clarity” on the “Sonar Features” menu, then press the ENT key to select it. Use the cursor keys to highlight the desired level of surface clarity, then press the ENT key.

Noise Rejection

The automatic noise rejection system built into this unit constantly evalu- ates the effects of boat speed, water conditions, and interference from electrical and mechanical sources such as bilge pumps, engine ignition systems and wiring, even engine vibration. It then works to reduce or eliminate the negative effects on the sonar screen. This gives the best display possible under most conditions.

The Noise Rejection system is an effective tool in combating noise. In sonar terms, noise is any undesired marks on the display.

This unit has two levels of noise rejection: normal and high. It can also be turned off. The default is normal. To change it, highlight “Noise Rejection” on the “Sonar Features” menu, then press the ENT key to select it. Use the cursor keys to highlight the desired level of noise rejection, then press the ENT key.

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Contents LCX-15CI LCX-15CT Never use this product while operating a vehicle Specifications Table of Contents Introduction AccessoriesModel Transducers ModelBracket InstallationPower Connections NMEA/DGPS NMEA/DGPS WiringSpeed/Temperature Connections Accessory ConnectionsSonar Connector Temperature and Speed/Temperature Installation ExamplesMMC Keyboard Pages Full Sonar ChartSplit Zoom Sonar Chart Menus Sonar Options SensitivityAutomatic Sensitivity Range Automatic Colorline Range Upper and Lower Limits Range ManualChart Speed Stop ChartZoom Depth CursorSonar Features Chart DataTransducer Frequency Surface ClarityNoise Rejection Fish Depths Sonar Features Fish SymbolsLOG Sonar Chart Data Audio AlarmsZone Alarm Depth AlarmsFish Alarm Sonar SetupTransducer Type Reset Water Distance Keel OffsetCalibrate Speed System Setup Sonar SimulatorUnits of Measure Communications Ports Set Local TimeConfigure Dgps Configure NmeaReset Options Hide GPS features Popup HelpSoftware Information Introduction to GPS GPS OperationNever use this GPS receiver while operating a vehicle Finding Your Position Auto SearchManual Initialization Position Aquisition Require Dgps GPS Operation PagesStatus Navigation Customizing the Status ScreenMap Customizing the Navigation ScreenPage Cursor Map Orientation Cursor DistanceNORTH-UP Auto Zoom Range Rings/Grid LinesMap Data Icons Map Categories DrawnPlot Trail Navigate a Trail Edit TrailPage Trail Options New TrailDelete All Trails Saving the Cursor Position as a Waypoint WaypointsSaving a New Position Waypoint Information Average PositionWaypoint Navigation MAN Overboard Routes Cancel NavigationCreate a Route Page GPS Simulator Follow a RouteCoordinate System GPS SetupMap Fix Datum Position Pinning Important Alarm Notes Trip Calculator Timers/Alarm ClockUnit freezes, locks up, or operates erratically Unit won’t turn onNo fish arches when the Fish ID feature is off Noise Lowrance ELECTRONICS, INC Full ONE-YEAR Warranty Datums Datums Datums Lowrance Databases License Agreement Databases Limited Warranty Page Transferring GPS Data to/from a MMC How to Obtain Service How to Obtain Service U.S.A. Only
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