Lowrance electronic X105C DF, X100C manual ASP Advanced Signal Processing, To change the ASP level

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Section 4: Sonar Options & Other Features

Material in this section is arranged in alphabetical order.

ASP(Advanced Signal Processing)

The ASP feature is a noise rejection system built into the sonar unit that constantly evaluates the effects of boat speed, water conditions and interference. This automatic feature gives you the best display pos- sible under most conditions.

The ASP feature is an effective tool in combating noise. In sonar terms, noise is any undesired signal. It is caused by electrical and mechanical sources such as bilge pumps, engine ignition systems and wiring, air bubbles passing over the face of the transducer, even vibration from the engine. In all cases, noise can produce unwanted marks on the display.

The ASP feature has four settings — Off, Low, Medium and High. If you have high noise levels, try using the "High" ASP setting. However, if you are having trouble with noise, we suggest that you take steps to find the interference source and fix it, rather than continually using the unit with the high ASP setting.

There are times when you may want to turn the ASP feature off. This allows you to view all incoming echoes before they are processed by the ASP feature.

At left, Sonar Menu with Sonar Features selected. In the Sonar

Features menu, Noise Rejection is selected with ASP in the default low setting (center, dual-frequency menu; at right, single-frequency menu).

To change the ASP level:

1. From the Sonar Page, press MENU↓ to SONAR FEATURESENT.

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Contents X100C X105C DF Lowrance Electronics Inc 12000 E. Skelly Dr Tulsa, OK USA Table of Contents Page Read Me First Page How Sonar Works Keyboard How to use this manual typographical conventionsMenu Commands Arrow KeysPreparations Transducer InstallationShoot-through hull installations Single-frequency transom installationsDual-frequency transom installations Single-frequency trolling motor installationsGood location Poor location Location Poor angle How low should you go?Deadrise less than Strakes Pad Transom Transducer centerline Hull bottom Shoot-thru-hull vs. Transom MountingDot Assembling the bracketTransducerTransducer bracket Ratchet Aligning the transducer on the transomRatchets Drilling mounting holes Assembling the transducerTransom Attaching transducer to transomBottom Hull Flat-bottom hull Deep-vee hull TMB-S bracket Internal tooth washer Bolt Nut Flat washer Trolling Motor Bracket Installation single-frequency onlyTransducer aimed Hulls With Floatation MaterialsPartial fish arches Transducer location High speed Trolling speed Testing Determines Best LocationTrue bottom Second bottom Manual range setting Spread epoxy here Sand this surface Shoot-thru-hull InstallationOptional Speed Sensor Installation Optional Temperature SensorTransom Bottom of hull Good locationPowering a Nmea 2000 Buss Nmea 2000 Power cable Power ConnectionsPowering Your Unit Power Supply cable red and black wires Power connections for the units in this series To Nmea To sonar Network port Units Network Socket Connecting to a Nmea 2000 NetworkNmea 2000 Cable Connections Nmea 0183 Cable ConnectionsMounting the Unit Bracket, In-Dash or Portable Front Bracket Installation173.9 77.1 27.6 137.9 Millimeter 56.9 Inch Portable Installation Other AccessoriesIn-Dash Installation Face Cover Keyboard Basic Sonar OperationMain Menu Power/lights on and offMain Menu Pages Page Sonar Page, showing full sonar chart mode Basic Sonar Quick Reference Sonar Operations To adjust sensitivity To Restore Factory Settings Fish Symbols vs. Full Sonar ChartOther Free Training Aids Page To change the ASP level ASP Advanced Signal ProcessingDepth Alarms AlarmsZone Alarm Fish Alarm Calibrate Speed Chart SpeedColorLine Thin or no ColorLine Wider ColorLine Depth CursorCursor line Depth box Depth Range AutomaticTo turn Auto Depth Range on again To switch to Manual Depth RangeDepth Range Manual Depth Range Upper and Lower LimitsFish arches Area zoomed To change the upper and lower limitsTo turn off upper and lower limits Fish I.D. Fish Symbols & DepthsFasTrack To turn on FishTrack To turn the Fish I.D. feature onFishTrack Frequency Change Transducer Frequency X105C DF only Symbols with FishTrack depthsNoise Rejection To change the frequency setting to 50 kHzTo change the frequency setting to 200 kHz HyperScrollTo turn off displayed data To change displayed data font size Ping Speed & HyperScrollTo change Ping Speed To turn off HyperScroll Reset OptionsReset Water Distance Set Keel Offset Automatic Sensitivity Sensitivity & Auto SensitivityTo turn Auto Sensitivity back on To adjust sensitivity in auto modeTo adjust sensitivity in manual mode Full Sonar Chart Sonar Color ModeSonar Page & Sonar Chart Display Options To change the chart mode color schemeDigital Data/Chart Split Zoom Sonar ChartCustomizing the Digital Data/Chart Screen FlashGraf Flasher Sonar SimulatorSurface Clarity Stop ChartTo adjust the Surface Clarity level Zoom & Zoom Bar Upper and Lower LimitsZoom Pan Page Unit freezes, locks up, or operates erratically Unit wont turn onNoise No fish arches when the Fish I.D. feature is offPage Page Supplemental Material Index Page Page Page Lowrance Electronics Full ONE-YEAR Warranty Not toll-free How to Obtain Service…Accessory Ordering Information for all countries Visit our web site