Furuno CSH-5L/CSH-8L manual Adjusting the gain, Retracting the transducer, turning off the power

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1. OPERATIONAL OVERVIEW

1.3.7Adjusting the gain

The [GAIN] control adjusts receiver sensitivity. It should be adjusted to see fish echoes clearly with minimal noise on the screen. Too high a setting not only causes excessive noise on the screen and makes it difficult to discriminate wanted fish echoes but also causes bottom echoes to be painted in strong colors, resulting that the echoes from bottom fish are masked by bottom reflections. A setting between 3 and 7 is usually suitable. Each time the control is operated the newly selected range appears in large characters for five seconds at the top of the sonar display. The current range is always displayed at the top right corner of the sonar display.

Gain too low

Gain proper

Gain too high

Examples of proper and improper gain

1.3.8Retracting the transducer, turning off the power

1.Set speed under 16 knots and then press the [↑] switch to retract the transducer. The lamp above the switch blinks while the transducer is being retracted. Transmission is stopped automatically. If you press the [↑] switch when the speed is over 16 knots and the speed warning is turned on in the SYSTEM menu, the message “Max allowable speed for extended transducer is 16 kt. Max allowable speed during raising lowering transducer is 16 kt.” and the audio alarm sounds. Press the [R/B key to silence the audio alarm.

2.When the lamp above the [↑] switch lights, meaning the transducer is completely retracted, press the [POWER] switch on the control unit to turn off the power.

3.Turn off the monitor.

Note 1: The transducer is automatically retracted into the tank whenever the power switch is turned off. However, for safety purposes, make it a habit to retract the transducer before turning off the power.

Note 2: The equipment can be set to automatically retract the transducer when the ship exceeds the operator-set speed. (Speed data required.) The transducer may be retracted at a different speed than set if the speed data is different from actual speed. In all cases, reduce the speed below 16 knots and then retract the transducer.

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Contents Color Scanning Sonar 00080940402 Safety Instructions Turn off the hull unit before using the hand crank Table of Contents Marks and Data Index Foreword FeaturesWord to the Owner of the CSH-5L/CSH-8L System configuration of CSH-5L System ConfigurationVii Viii System configuration of CSH-8LControl Unit Operational OverviewControl unit Remote controller Remote Controller optionTurning on the power Basic Operating ProcedureLowering the transducer Sonar menu TransmittingSystem menu Adjusting backlighting of control unitCOMBI-1 Choosing a display modeMode description Description Display NormCOMBI-1 display sonar display + audio display Normal mode display sonar displaySonar display COMBI-1 display sonar display + audio displayDetection range Choosing the display rangeCOMBI-2 display sonar display + echosounder display COMBI-2 display sonar display + echosounder displayRetracting the transducer, turning off the power Adjusting the gainExamples of proper and improper gain Automatic tilt on/off Setting the Tilt AngleTilt range Range m ±2-10 ±4-14 ±6-20 ±10-26 Range and tilt angleAuto tilt concept Case 2 Tilt angle 10 to 20 degrees How to discriminate fish echoes from the bottomBottom and tilt angle Case 1 Tilt angle 30 to 40 degreesTilt angle for surface fish Points to considerTilt angle and surface fish example CSH-5L Location of trackball data Finding Range and Bearing to a TargetSuitable tilt angle Depth, detection range and tilt angleSonar Menu Overview Operating procedureDescription of sonar menu Sonar menu descriptionDescription Ref. Description of sonar menu con’t from previous This page intentionally left blank Eliminating Unwanted Echoes Fine Tuning the Sonar PictureHow TVG works Suppressing Bottom Tail Displaying Surface Fish Clearly1 AGC 3 2ND AGC Pulse lengthHow to adjust TX output Rejecting noise with the noise limiter Rejecting Sonar Interference and NoiseIdentifying noise source Rejecting noise with the interference rejectorInterference rings Rejecting interference with TX cycleHorizontal beamwidth Choosing BeamwidthDeleting Weak Echoes Echo AveragingThis page intentionally left blank Tracking a Fish School target lock Advanced Sonar OperationTarget lock mark and target lock data Target lock and tilt angle Detecting Fish Schools Aurally Fish alarm zone Fish AlarmFish alarm zones Entering a fish mark Measuring Fish School SpeedFish mark and fish mark data Relocating Fish School for Easy Observation How to use the off-center functionDeleting individual fish marks Entering an event mark How to use the event markEvent Mark, Own Ship Position Mark Event markDeleting an event mark Entering an own ship position markEvent marks Track Collectively Deleting MarksShip Erase Marks dialog box Function Keys F1-F4Operating the function keys Programming for fishing ground or target fishBeamwidth Color Curve Response Programming specific functionUseful programs main items only TX Output Pulse Length TX Cycle TVG Near TVG FAR HORFunction key assignment confirmation screen Confirming function key programHow the stabilizer works Suppressing Effects of Pitching and Rolling StabilizerStabilizer mark Advanced Sonar Operation Choosing the Range Echosounder ModeDisplay range and shift concept Sounder menu Adjusting the GainMeasuring Depth Picture Advance SpeedMeasuring depth Clutter Suppressing InterferenceSuppressing Low Level Noise InterferenceWeak echoes Erasing Weak EchoesDraft Other Items on the Sounder MenuSounder menu description CurveMarks and Data on the Normal Display Marks and DataMarks and data on the normal display Points to North Heading Mark Description of marks and data on the normal displayMarks and Data Press the R/B key. Own ship position and trackball mark are Marks and data on the echosounder and audio displays Marks and Data on the Echosounder and Audio DisplaysOn the System menu Bottom Echo Interpreting the DisplayBottom echoes Fish echoes Fish SchoolWake Sea Surface ReflectionsWake Sea surface reflectionsNoise and interference False Echo by SidelobeNoise and Interference Sidelobe echoMarks Menu Marks and System MenusMarks menu Marks menu description Disp Select System MenuSystem menu Description of System menu DimmerDescription of System menu con’t from previous General Maintenance MAINTENANCE, TroubleshootingCleaning the Equipment Hull unit maintenance points Hull Unit MaintenanceLubrication points, zinc plate Hull unit Manually raising the transducerHand crank Type Code No Fuse ReplacementFan Replacement Unit Fuse Type Code NoSymptom Check, Remedy TroubleshootingHigh speed Error MessagesMessage Meaning, Remedy Overvoltage Transducer not retractedChoosing a diagnostic test Diagnostic TestsSingle test, Continuous test Description of diagnostic testsContinuous test example CSH-5L, 55 kHz transducer Panel test Panel testPattern test Color testWhite RED Green Blue Color testSIO test SIO testEcho tests Echo testsSpecifications of Color Scanning Sonar CSH-5L/8L Hull Unit Interface This page is intentionally left blank AP-1 Menu TreeSonar menu Sounder menuSystem menu Marks menuAP-2 IN-1 Index

CSH-5L/CSH-8L specifications

Furuno CSH-5L and CSH-8L are advanced marine radar systems known for their cutting-edge technology and user-friendly interfaces. Designed primarily for maritime applications, these radar units cater to a wide range of vessels, from commercial ships to fishing boats. The primary distinguishing feature of the CSH-5L and CSH-8L radar systems lies in their ability to provide high-resolution images and precise detection of targets, ensuring navigational safety and operational efficiency on the water.

One of the standout technologies incorporated into both models is the pulse compression technique. This feature significantly enhances target resolution and minimizes blind spots, allowing the radar to detect smaller objects at greater distances. With the CSH-5L and CSH-8L's powerful signal processing capabilities, users can expect exceptional performance even in challenging weather conditions, ensuring reliable operation during storms or fog.

The CSH-5L model operates at a frequency range of 5 GHz, while the CSH-8L uses an 8 GHz frequency. Both radars are equipped with a rotating antenna that provides a wide coverage range, allowing for efficient monitoring of the surrounding marine environment. Their high sensitivity and low noise levels enhance target detection, making them particularly useful for locating small fishing vessels or buoys.

Another important characteristic of the Furuno CSH-5L and CSH-8L is their user-friendly interfaces. Both models feature intuitive controls, allowing operators to adjust settings easily and access critical information quickly. The displays are designed for clarity, enabling users to distinguish between targets and navigate effectively.

Additionally, the radar systems include advanced features such as automatic target tracking and target acquisition capabilities. This functionality allows users to monitor multiple targets simultaneously, providing essential situational awareness for safe navigation. The CSH-5L and CSH-8L also support integration with other onboard systems, including ECDIS (Electronic Chart Display and Information System), which enhances the overall effectiveness of maritime navigation.

In summary, the Furuno CSH-5L and CSH-8L radar systems represent the forefront of marine radar technology, offering exceptional detection capabilities, user-friendly controls, and robust integration options. Their advanced features ensure that mariners can navigate confidently, making them a vital asset for anyone operating in the marine environment.
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