Anritsu 6DXRA775UA Marine Radar RA775UA User Manual 0 TITLE

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6DXRA775UA User Manual

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RA775UAMarine RadarInstruction Manual2nd EditionCommunication Systems DivisionInformation & Communications GroupANRITSU CORPORATIONDocument : E-A775UA-2-01• Read this manual before using the equipment.• Keep this manual.

iTo prevent the risk of personal injury or damage to the equipment, Anritsu Corporationuses the following safety symbols to indicate safety-related information. Insure that youclearly understand the meanings of the symbols BEFORE using the equipment.Symbols Used in ManualThis indicates a very dangerous procedure that could resultin serious injury or death if not performed properly.This indicates a hazardous procedure that could result in se-rious injury or death if not performed properly.This indicates a hazardous procedure or danger that couldresult in light-to-severe injury, or that might damage theequipment, if proper precautions are not taken.Safety Symbols Used on EquipmentThe following safety symbols are used inside or on the equipment near operation loca-tions to provide information about safety items and operation precautions. Insure thatyou clearly understand the meanings of the symbols and take the necessary precau-tions BEFORE using the equipment.This indicates high voltages with a risk of serious electric shock if thepart is touched. NEVER touch the part with bare hands, etc.The symbol prohibits the operation shown inside the symbol. (Theexample in the left prohibits disassembly.)The symbol indicates that the operation inside the symbol ispotentially hazardous. (The example on the left indicates that the plugshould be held when disconnecting it from the AC outlet.)This indicates the ground (earth) terminal. If the equipment cannot begrounded via the power cord, connect this terminal to ground. Thereis a risk of serious electric shock if the equipment is not grounded.RA775UAMarine RadarInstruction Manual 25th Aug. 1999 (2nd Edition) 14th July. 1999 (1st Edition)Copyright © 1999, ANRITSU CORPORATION.All right reserved. No part of this manual may be reproduced without the prior written per-mission of the publisher. The contents of this manual may be changed without prior notice.Printed in JapanSafety SymbolsDANGER!WARNING!CAUTION!

ii・DO NOT OPEN THE COVER EXCEPT SERVICE PERSONNEL. YOU MAY GET AN ELECTRIC SHOCK.・SWITCH OFF SHIPS MAIN BEFORE MAINTENANCE. ROTATING ANTENNA MAY HIT YOU.・ KEEP OFF DURING TRANSMISSION. RADIATION LEVEL: 10W/m2 DISTANCE : 1.8m・ DO NOT DROP COVER. IT MAY HIT SOMEBODY.・サービスマン以外はふたを開けないでください。感電するおそれがあります。・作業前に主電源を切って下さい。回転しているアンテナでけがをするおそれがあります。・送信中に近付かないでください。放射レベル : 10W/m2 距離 : 1.8m・カバーなどを落下させないでください。下にいる人が危険です。・DO NOT PAINT THE RADOME. PERFORMANCE WILL DOWN. ・レドームにはペンキを塗らないでください。性能が落ちます。 •There is a risk of receiving electric shock if these parts are touched byaccident. Only qualified personnel should remove covers on theseparts.‚To avoid accidental antenna rotation, turn off ship’s main and pull offout the motor fuse during repair inspect, or maintenance.When repairing or inspecting the scanner unit wear a safety harnessand provide a secure platform so that there is no danger of falling evenwhen the vessel lists or when there is an unexpected incident such asan earth quake.ƒDo not approach the antenna while it is transmitting.In addition, at inspection never look into the wave guide during trans-mission.„When remove the scanner cover etc., do not drop it. It may endangerpeople below.…Do not paint the RADOME. Antenna performance will be down.For Safety！WARNING / 警告！CAUTION / 注意③④⑤①②

iii ・ SEE INSTRUCTION MANUALS BEFORE CONNECTING POWER. SAFETY INFORMATION IS WRITTEN IN. ・ EARTH CONNECTION ESSENTIAL BEFORE CONNECTING POWER. YOU MAY GET AN ELECTRIC SHOCK. ・ DO NOT OPEN THE COVER EXCEPT SERVICE PERSONNEL. HIGH VOLTAGE IS INSIDE. YOU MAY GET AN ELECTRIC SHOCK. ・電源接続する前に、必ず取扱説明書を読んでください。安全情報が記載されています。・電源接続する前に、アース接続を行ってください。感電のおそれがあります。・サービスマン以外は、ふたを開けないでください。高圧部分があり、感電のおそれがあります。•See instruction manuals before connecting power. Safety information iswritten in. ‚Earth connection essential before connecting supply.There is a risk of serious electric shock if the equipment is notgrounded.ƒThere is a risk of receiving electric shock if these parts are touched byaccident.Only qualified personnel should remove covers on these parts.！WARNING / 警告①②③

ivInstallationRadio laws dictate that this radar may only be installed by properly licensed personnel.LicensingYou must obtain a license as prescribed by the Radio Law to operate this unit.ExportingAccording to the sales agreement with your distributor, this product is for use only within yourcountry. When taking it overseas, there may be cases where you must obtain exportpermission. Contact Anritsu Corporation or one of our dealers as soon as possible if you areplanning to take the product out of your country.Equipment CertificateAnritsu Corporation certifies that this equipment was tested before shipment, to meet recog-nized standards.WarrantyAnritsu Corporation warrants this equipment to be manufactured in accordance with pub-lished specifications and free from defects in materials and/or workmanship.Anritsu Corporation will repair or exchange any parts except consumable parts proven to bemalfunctioning under normal use for a period of two (2) years. This warranty policy shall notcover any labor charge.Limitation of WarrantyAnritsu Corporation’s warranty policy does not apply to product which has been subjected toaccident, abuse, or misuse, shipping damage, alterations, corrosion, incorrect and/or unau-thorized service or modification, or product which the serial number plate has been altered orremoved.ANRITSU CORPORATION MAKES NO WARRANTIES, EITHER EXPRESSOR IMPLIED, EXCEPT AS PROVIDED HEREIN, INCLUDING WITHOUTLIMITATION PARTICULAR PURPOSE OR USE, OR AGAINST INFRINGE-MENT OF ANY PATENT. IN NO EVENT SHALL ANRITSU BE LIABLE FORANY DIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANYNATURE, OR LOSSES OR EXPENSES RESULTING FROM ANY DEFEC-TIVE PRODUCT OR THE USE OF ANY PRODUCT.Should you have queries about maintenance, please contact our distributor.To Customers* To use this equipment effectively, the operation and maintenance procedure in this manualmust be followed properly. Note that this equipment is only a navigational instrument havingno warrant for navigation safety. Non-execution of fundamental navigation requirementssuch as the ship location check or lookout is not allowed.* If some abnormality occurs in this equipment, immediately turn off the equipment POWERswitch and the radar main switch in the power distribution board and notify our maintenancesection or dealer.* This instrument uses oscillator and LCD backlight. They are easy to be broken. Do not sub-ject the instrument to excessive force or drop it.* The mercury (Hg) is used in LCD backlight. When you discard your radar, it is due to laws orregulations of your nations.

vContentsFor safetyCHAPTER 1 OVERVIEW.................................................................................11.1 Introduction.......................................................................................................11.2 Organization of This Manual............................................................................1CHAPTER 2 USING RADAR FOR THE FIRST TIME...................................22.1 What is a radar ?...............................................................................................22.2 Characteristics of Radar Wave..........................................................................32.3 Terms Specific to Radars...................................................................................6CHAPTER 3 INSTALLATION.........................................................................103.1 Checking Contents of Your Package.................................................................103.2 Checking Power Supply Voltage.......................................................................11 3.2.1 Power Supply Requirement .........................................................................11 3.2.2 Fuse Replacement ........................................................................................113.3 Determining Place of Installation.....................................................................12 3.3.1 Scanner unit.................................................................................................12 3.3.2 Display unit..................................................................................................12 3.3.3 Shifting away from obstacles .......................................................................133.4 Installing Scanner Unit ....................................................................................143.5 Installing Display Unit .....................................................................................153.6 Connecting Cables.............................................................................................17 3.6.1 Interconnecting cable...................................................................................17 3.6.2 Grounding wire ............................................................................................19 3.6.3 Power supply cable.......................................................................................203.7 Adjustment........................................................................................................213.8 Connecting External Equipment to Display Unit ............................................213.9 Countermeasure for Electromagnetic Interference..........................................223.10 When Discarding Your Radar.........................................................................23CHAPTER 4 FUNCTIONS AND NAMES....................................................... 244.1 Key layout .........................................................................................................244.2 Rear panel .........................................................................................................254.3 Radar screen (Single screen).............................................................................254.4 Radar screen (Dual screen)...............................................................................264.5 Radar screen (All PPI screen)...........................................................................264.6 Radar screen (All PPI/PPI screen)....................................................................274.7 Navigation screen..............................................................................................27CHAPTER 5 OPERATION...............................................................................28Basic operation of Radar.........................................................................................285.1 Powering On and Off.........................................................................................285.2 Adjusting contrast and brilliance of the screen, and key-backlight.................285.3 Basic Operations ...............................................................................................29 5.3.1 Powering On and Off....................................................................................29 5.3.2 Transmitting ................................................................................................29 5.3.3 Adjusting contrast and brilliance of the screen, and key-backlight............30

vi 5.3.4 Changing Distance Range (RANGE UP, RANGE DOWN)......................... 30 5.3.5 Automatic adjustment (AUTO).................................................................... 30 5.3.6 Sensitivity adjustment (GAIN).....................................................................31 5.3.7 Removing sea clutter (STC)..........................................................................31 5.3.8 Removing rain and snow clutter (FTC)........................................................32 5.3.9 Man Over Board (MOB)............................................................................... 325.4 Functions of Soft Keys...................................................................................... 33 5.4.1 Bearing measurement (EBL1)..................................................................... 33 5.4.2 Bearing measurement (EBL2)..................................................................... 33 5.4.3 Distance measurement (VRM1)................................................................... 33 5.4.4 Distance measurement (VRM2)................................................................... 34 5.4.5 Measuring the angle between two points (FL EBL2).................................. 34 5.4.6 Measuring the distance between two points (FL VRM2)............................ 34 5.4.7 Changing the group of Soft Keys(NEXT) .................................................... 35 5.4.8 Erasing heading maker temporarily (HDG OFF) ....................................... 36 5.4.9 Using parallel cursors (///CSR) .................................................................... 36 5.4.10 Establishment of the indication of the RANGE RINGS (RINGS)............. 36 5.4.11 ON/OFF of variable range function (VAR RNG)....................................... 36 5.4.12 Changing display modes (MODE).............................................................. 36 5.4.13 Guard Zone (GZ) ........................................................................................ 36 5.4.14 Off Center (OFF-C) .................................................................................... 37 5.4.15 Setting of the SLEEP function(SLEEP)..................................................... 38 5.4.16 Tuning adjustment (TUNE)....................................................................... 38 5.4.17 Echo expansion (ST)................................................................................... 39 5.4.18 Displaying locus of target (TRACK)........................................................... 39 5.4.19 Enlarging selected areas (ZOOM).............................................................. 39 5.4.20 Increasing sensitivity (S/L)........................................................................ 40 5.4.21 Switching the screen (SEL WIN)............................................................... 40 5.4.22 Reversing the screen (PICTURE).............................................................. 40 5.4.23 Change to PPI screen (PPI) ....................................................................... 41 5.4.24 Change to SEMI3D/PPI screen (SEMI3D) ................................................ 41 5.4.25 Change to PPI/PPI screen (PPI/PPI) ......................................................... 41 5.4.26 Change to PPI/NAV screen (PPI/NAV)...................................................... 42 5.4.27 Change to ALL PPI screen (ALL PPI)....................................................... 42 5.4.28 Change to ALL PPI/PPI screen (ALL PPI2).............................................. 425.5 MENU Operation.............................................................................................. 43 - List of MENU.................................................................................................... 43 5.5.1 Mark Menu .................................................................................................. 44 5.5.1.1 Bearing measurement (EBL1)................................................................. 44 5.5.1.2 Determining the distance (VRM1)........................................................... 45 5.5.1.3 Bearing measurement (EBL2)................................................................. 45 5.5.1.4 Determining the distance (VRM2)........................................................... 45 5.5.1.5 Measuring the distance or angle between two points ( FL EBL2, FL VRM2 )......................................45 5.5.1.6 Measuring the angle between two points (FL EBL2).............................. 46 5.5.1.7 Erasing heading maker temporarily (HDG OFF) ................................... 47 5.5.1.8 Using parallel cursors (///CSR) ................................................................ 47 5.5.1.9 Establishment of the indication of the RANGE RINGS (RINGS)........... 48 5.5.1.10 Variable range function ( VAR RNG ) ................................................... 48 5.5.1.11 Output the position data of Cursor (TARGET)...................................... 49 5.5.1.12 Follow the Distance and Bearing marker on the cursor (+MK LINE).. 49 5.5.2 Nav (Navigation) Menu ................................................................................ 50

vii 5.5.2.1 Changing display mode (MODE)............................................................50 5.5.2.2 Guard Zone (GZ)......................................................................................51 5.5.2.3 Shifting display in specific direction (OFF-C)..........................................52 5.5.2.4 Setting of the SLEEP function(SLEEP)...................................................525.5.3 Echo Menu......................................................................................................54 5.5.3.1 Sensibility adjustment (GAIN).................................................................54 5.5.3.2 Removing sea clutter (STC)......................................................................55 5.5.3.3 Removing rain and snow clutter (FTC)....................................................55 5.5.3.4 Adjusting receiver tuning (TUNE)...........................................................55 5.5.3.5 Echo expansion (ST).................................................................................55 5.5.3.6 Displaying locus of target (TRACK) ........................................................56 5.5.3.7 Enlarging selected areas (ZOOM) ...........................................................57 5.5.3.8 Increasing sensitivity (S/L) ......................................................................57 5.5.4 SETUP Menu...............................................................................................59 5.5.4.1 Initiating the screen display (WINDOW) ................................................59 - The limitation of the screen operation..............................................................60 - Screen modes and Operations ...........................................................................60(a) PPI Screen .............................................................................................60(b) PPI/SEMI3D Screen ..............................................................................61(c) PPI/PPI Screen.......................................................................................61(d) PPI/NAV Screen ....................................................................................62(e) ALL PPI Screen .....................................................................................62(f) ALL PPI/PPI Screen...............................................................................62(g) MOB Screen...........................................................................................63 5.5.4.2 Switching screens on PPI/PPI screen (SEL WIN) ...................................63 5.5.4.3 Reversing the screen (PICTURE) ............................................................63 5.5.4.4 Fault Diagnosis by Self Check (SYSTEM CHECK).................................64 5.5.4.5 Changing the content of the setting (CUSTOM) .....................................66 5.5.4.5.1 Changing the settings of soft keys (KEY ASSIGN) .............................67 5.5.4.5.2 Changing the content of settings 1(PRESET1)....................................69 5.5.4.5.3 Changing the content of settings 2 (PRESET2)...................................71 5.5.4.5.4 Changing the content of settings (ADJUSTMENT)..............................73(1) Adjusting distance (TIMING ADJ)......................................................73(2) Adjusting angle (HEAD ADJ)..............................................................73(3) Adjusting tuning circuit (TUNING CAL) ............................................74(4) Adjusting antenna height (ANTENNA)...............................................75(5) Setting automatic gain circuit (AUTO GAIN) .....................................76(6) Setting automatic STC circuit (AUTO STC)........................................76(7) Setting HARBOR STC circuit (HARBOR)...........................................76CHAPTER 6 MAINTENANCE AND INSPECTION.......................................77CHAPTER 7 TROUBLESHOOTING............................................................... 797.1 Fault Diagnosis by Self-check...........................................................................797.2 Inspecting Each Part.........................................................................................80CHAPTER 8 PRODUCT SPECIFICATIONS ..................................................818.1 General...............................................................................................................818.2 Scanner Unit ......................................................................................................828.3 Display Unit .......................................................................................................82

viii8.4 External Interface..............................................................................................838.5 Standard set.......................................................................................................838.6 Options...............................................................................................................848.7 External dimensions and weight.......................................................................848.8 External Interface..............................................................................................84APPENDIX1. GENERAL SYSTEM DIAGRAM 24W1609412. INTERCONNECTION DIAGRAM 24W1609393. OUTLINE DRAWING DISPLAY UNIT 23W726464. OUTLINE DRAWING SCANNER UNIT 23W687395. FLUSH MOUNT PROCEDURE6. TEMPLATE OF SCANNER MOUNTING HOLES (ACTUAL SIZE)7. INDEX

1CHAPTER 1 OVERVIEW●1.1 Introduction The RA775UA represents a compact, high-performance marine radar that delivers a peakpower output of 2 kW from the antenna and uses an 10-inch monochrome liquid crystal display.In addition to a microcomputer, it incorporates a video signal processing LSI and a newlydeveloped LSI chip exclusively designed for radars, thus providing versatile functionality andhigh performance.Features1. A thin display unit incorporating a liquid crystal display.2. Easy operation using only a few keys and menu screens.3. A position of key and its function can be set in position ( Selectable soft function key).4. Easy operation by the rotary knob. Gain, STC, FTC, EBLs, VRMs etc. can be controlled by the rotary knob.4. A short and a long range echo can be seen at a time ( Dual range radar).5. Semi-3D screen display for easy identification of targets in noise.6. Capable of continuous distance range changes (Continual variable range).7. Waterproof construction of display allows installation at any desired location.●1.2 Organization of This Manual This manual provides a wide range of information necessary to operate the RA775UA ra-dar ranging from the basic knowledge on radars to the methods of operating, installing, andmaintaining the RA775UA radar. The manual also provides rather detailed technical informa-tion on how to adjust video display to obtain clear images. Anritsu recommends you to readthis manual thoroughly from beginning to end in order to understand the various functions ofthe RA775UA radar so you can take full advantage of its advanced functions. If you are using aradar for the first time, refer to the basic data on radars in CHAPTER 2.This manual consists of the following chapters:USING RADAR FOR THE FIRST TIME ...................... CHAPTER 2INSTALLATION ...................... CHAPTER 3FUNCTIONS AND NAMES ...................... CHAPTER 4OPERATION ...................... CHAPTER 5INSPECTION AND MAINTENANCE ...................... CHAPTER 6TROUBLESHOOTING ...................... CHAPTER 7PRODUCT SPECIFICATIONS ...................... CHAPTER 8If you are an experienced user of radars, skip CHAPTER 2 and begin from CHAPTER 3.

2CHAPTER 2. USING RADAR FOR THE FIRST TIMEThis chapter describes basic information on radars and explains technical terms used in ra-dar operation for those who is using a radar for the first time.●2.1 What is a radar ? A marine radar is one of the navigation equipment installed on a ship. It emits a radio wavein very high frequency called a microwave from its antenna and receives the reflected radio wavefrom objects on the sea (e.g., other ships, buoys, and lands). The received radio wave is convertedinto an electric signal which is displayed on a display screen to indicate the presence of such ob-jects. Although it is very difficult to find other ships or the destination coast with human eyes atnight or in thick fog, a radar helps you detect objects on the sea helping you avoid danger whensailing. The antenna turns 360 degrees as it radiates waves, allowing you to grasp ambientconditions around your ship at a glance.The radio wave radiated from the antenna is called a pulse wave and the radar performstransmission and reception alternately. Several hundred to several thousand pulse waves gener-ally are transmitted while the antenna rotates one turn.AntennaThere are many types of antennas generally used for aradar. For example, these include a parabolic antenna and aslotted-array antenna. The performance of the antennadetermines that of the radar. The dominant factors are theantenna's beam width and side lobe level. The narrower thebeam width, the higher the resolution of the angle direction.The lower the side lobe level, the fewer the effect of a false echo.Side lobeA beam in one direction in which the strongest radiowave is radiated from the antenna is called the main lobeand beams in other directions are called "side lobes". Theside lobe level refers to the difference in level betweenthe largest side lobe and the main lobe.BuoyOther ship Radar waveYour ship Antenna (Rotating)Radar displayFig.2-1 What is a radar?Beam widthSide lobelevelMain beamSide lobeAntennaFig.2-2 Antenna pattern

3Beam widthA beam width is defined as the width of the main lobe at an angle where the radiatedpower is halved as measured from the position from which the strongest radio wave is radi-ated.●2.2 Characteristics of Radar Wave Radio waves from the radar propagate while bending slightly along the terrestrial surface.This characteristic varies dependent on the density of the atmospheric air. The sight distance D ofa radar generally is said to be approximately 6% longer than the optical sight distance and iscalculated using the equation below : D (NM) = 2.22 ( h1 + h2 ) where, h1= antenna height in metersh2= target height in metersFig.2-3 Radar waveTargets difficult to display on screenThe intensity of the reflected wave from a target depends on the distance, height, andsize of the target, as well as its material and shape. Targets constructed with FRP, wood, orother low-reflectance materials or those that have a small incident angle are difficult to dis-play on a screen. Therefore, FRP and wooden ships, sandy beaches, and sandy or muddyshallows all are difficult to catch and require attention when monitoring on the screen. Es-pecially, coast lines on the radar image appear to be present more apart from the ship thanthey are actually located. Therefore, it is important not to misinterpret the available data.Shadow zones of radarRadar waves are characteristic in that they propagate straight ahead. Therefore, if theship's smokestack or mast is located near the antenna or there is a tall ship or mountain atthe side of the ship, such an object generates a shadow behind it. In this case, some objectsproduce a complete shadow and some produce a partial shadow. In an extreme case, theApparent coastlineActual(invisible)coastlineInvisibleVisible31HUFig.2-4 Targets difficult to display on screenh1 h2Line of sightRadar Radio WaveEarth

4shadow of an object may extend to a position far away and cannot be displayed on the screenat all. Since these shadows can be discovered when installing an antenna, the problem canbe avoided by changing the place of antenna installation to minimize the shadow. Targets inshadow zones are difficult to display on the screen.False echoesA false echo of an actually nonexistent object may sometimes appear on the screenwhen sailing. The following explains the cause of each of such phenomena.A. Ghost echoesIt sometimes happens that one large object near the ship appears at two different bear-ings. One is the actual echo and other is a ghost echo generated as the wave is re-reflectedfrom the ship's own smokestack or mast. The former appears at the correct distance andbearing on the screen and the latter appears behind the smokestack or mast. This type offalse echo is also generated by re-reflection of waves from bridges and quay walls other thanthe ship itself.B. Multiple echoesIf there is a large vertical reflecting plane near the ship as in the case when your shippasses alongside a large ship, the wave is repeatedly reflected back and forth between yourship and the other object. For this reason, two to four images appear on the screen at equalintervals in the same bearing. A false echo that is generated by such multiple reflections iscalled multiple echoes. In this case, an image appearing at the nearest position is the realecho. Multiple echoes disappear as the ship moves away from the reflecting object or itsbearing changes. Therefore, it is not difficult to determine the correct image.TargetDirect reflectionpathSecondaryreflection pathMast etc.Real echoGhost echoDirection of ghost echo3１ HUFig.2-5 False echoes of radar (Ghost echoes)

5C. False echoes caused by side lobeThe radiant beam emitted from an antenna contains side lobes in directions other thanthat of the main beam. Since the side lobe level is low, it in no way affects distant targets.However, if there is a strong reflecting target near the ship, it sometimes appear as a circu-lar-arc false echo on the screen.When located near large targets such as land, theship's mast, etc. sometimes appears as a false echoof circular-arc shape.31HU Real echoMultipleechoesFig.2-6 False echoes of radar (Multiple echoes)3１HUAntennaMain beamSide lobesReal echoFalse sidelobeechoesFig.2-7 False echoes of radar (Caused by side lobe)CAUTION!

6D. Distant false echoes caused by duct phenomenonDepending on meteorological conditions, duct phenomenon sometimes occurs in tem-perature inverting layers of air. In such a case, the wave propagates erratically reaching alocation surprisingly far away from the ship. In this case, a target present at a distant loca-tion more than the radar's maximum distance range appears on the screen presenting afalse echo that can be misunderstood to be present nearer than the actual position. Thisphenomenon is attributed to the fact that since echo from the distant target arrives late, itgets out of the pulse repetition frequency and is displayed on the screen as an echo in thenext frequency. If the target distance changes as you switch over the distance range, youcan determine that it is a false echo.Radar interferenceIf a radar operating in the same frequency exists nearyour ship, interference noise may appear on the screen that iscaused by transmitted waves from that radar. This interfer-ence appears in various ways. In most cases, however, it ap-pears as spiral or radial patterns.The RA775UA radar has a function to eliminate interfer-ence. Use of this function helps you minimize interference.●2.3 Terms Specific to Radar HM (Heading Marker)This is a line-shaped marker used to indicatethe advancing direction of your ship.North MarkThis marker indicates the north direction. Itis a short line approximately 1/6 of the screensize.3１ HURadar inrterferenceFig.2-8 Radar interference0.750.25HUHM(Heading Marker)North MarkFig.2-9 Heading Marker and North Mark

7Display modesThis refers to a radar's display modes. There are four display modes depending on the direc-tion in which the top of the screen faces with respect to the ship.Head Up (HU)In this mode, the ship's heading always indicates the upward direction of the screen.This mode lets you know the relative positions of your ship and other ships or land.North Up (NU)In this mode, the north direction always indicates the upward direction of the screen,allowing you to compare your ship position with a marine chart as you navigate.Course Up (CU)The ship's heading in a course-up mode always indicates the upward direction of thescreen as the bearing toward the destination. In this mode, the ship can be maneuvered tosail the shortest distance to the destination by steering it in such a way that its headingmarker always directs to the upward direction of the screen. If the ship drifts due to tidalcurrent, care must be taken because the fixed targets move to other positions.True Motion (TM)In this mode, the ship is displayed as if it is moving on a marine chart while the fixedtargets such as islands and seashores are fixed in position. When the ship reaches a certainposition on the screen (approx. 2/3 of screen size), the ship is placed back to the opposite sideon the screen. (The top of the screen faces north.)Note: Navigation equipment such as a gyrocompass or magnet compass must be connectedto your radar system before it can be operated in NU, CU, and TM modes. (Refer to Section3.9 for details on how to connect your radar to navigation equipment.)Ship'sHeadingNorthScheduledcourseHMEBLNorthmarkHU NU CU TMShip's locus(not displayed on screen)NorthNorth Scheduledcourse0.75 0.75 0.75 0.25TM0.25CU0.25NU0.25HU0.75Fig.2-10 Display modes

8VRM (Variable Range Marker)This is a circular-shaped marker whose size can be changed as desired. You can use thismarker when you want to examine the distance of an echo from your ship.When measuring the distance of an echo from your ship, be sure to measure at a point closeto the center of the echo image on the screen.EBL (Electronic Bearing Line)This is a marker shaped like a straight line segment that can be changed to any directioncentering around the ship position. Use this marker to examine the advancing direction of yourship and its relative angle with an echo. When measuring the angle of an echo, position themarker at the center of the echo.VRMEcho0.750.25HUVRMFig.2-11 VRM0.750.25HU EBL EchoEBLEqual intervalsFig.2-12 EBL

9STC (Sensitivity Time Control)Since echo signals received by the radar are strong when they are coming from a short dis-tance, it is difficult to compare signal strength between each reflected signal. To overcome thisdifficulty, signal strength is adjusted in such a way that the received signal levels coming from ashort distance are lowered and those from a long distance are raised. This function should proveuseful when there are large reflected waves from sea surfaces during rough weather.FTC (Fast Time Constant)When it rains or snows, fine noise may appear over the entire screen, making it difficult toidentify echoes. In such a case, echo images on the screen can be made easily distinguishable byadjusting FTC.0.750.25HUSTC OFF STC ON0.750.25HUEcho is suppressedaround centerFig.2-13 STC0.750.25HUFTC OFF FTC ON0.750.25HUSmall noisesare reduced.Fig.2-14 FTC

10CHAPTER 3. INSTALLATIONThis chapter describes procedures for installing the RA775UA radar in your ship and precau-tions to be observed during installation. Follow the procedure below to install the radar.●3.1 Checking Contents of Your Package First, unpack your package and see if all of the following items are included.Item QTYDisplay unit 1 (RF718A)Scanner unit 1 (RB714A)Display cover 1Fuse 2Interconnecting cable 1 (10 m)Power supply cable 1 (2 m)M10 hexagonal bolt 4 setsThe package contains a 10m interconnecting cable as an accessory. Longer cable is alsoavailable as an option as listed in Tab.3-1.Checking contents of your packageChecking power supply voltageDetermining place of installationInstalling scanner unitInstalling display unitConnecting cablesAdjustmentConnecting external equipmentWhen discarding Your radar

11Tab.3-1 Optional Interconnecting CableIn addition to the above components included with your package, the following items are alsorequired. Please prepare them separately.Item QTY RemarksTapping screw or M5 bolt and nut 6 sets To install display unitGrounding wire 1Earth line for display unitGrounding wire and crimp terminal 1 set Earth line for scanner unit●3.2 Checking Power Supply Voltage 3.2.1 Power Supply RequirementsFor the RA775UA radar to be operated normally, the power supply (battery) detailed inTab.3-2 is required. Note also that if the battery is discharged, its voltage may fluctuate greatly,causing the radar to malfunction. When start up the radar system or start transmitting, an addi-tional rush current is required on the power line. Carefully check the power supply system includ-ing wiring by using a circuit tester.Tab.3-2 Power Supply Requirements*A.C. power cannot be used3.2.2 Fuse ReplacementFor the RA775UA radar to be operated safely, proper rating fuses must be used. Tab.3.3 isthe fuse rating table. Please check them and replace to the fuse in the package.Tab.3-3 Supply Voltage to Fuse TableNote: Marked * fuses are in the set as standard.Cable length Ordering Product No.15m 242J160680B20m 242J160680C30m 242J160680DSupply voltage used Maximum current Allowable range of voltageDC12V 5A 10.2-41.6VDC24V 2.5A 10.2-41.6VSupply voltage used Main Fuse Motor FuseDC12V 8A/250V or 125V *(6.3Φ x 32mm) T3.15A/250V or 125V *(5Φ x 20mm)DC24V 8A/250V or 125V(6.3Φ x 32mm) T3.15A/250V or 125V(5Φ x 20mm)

12●3.3 Determining Place of Installation 3.3.1 Scanner unitA radar's target detection capacity varies greatly depending on the fitted position of the scan-ner. An ideal fitting position is a location high above the ship's keel line where there is no obstacleall around the scanner. In an actual ship, such an ideal location is limited by various factors.Therefore, consider the following suggestions when you determine the place to install the scanner:(a) Install scanner at a position as high as possible.The higher the installation position, the longer the radio ranging distance. In-stall the scanner at a position as high as possible after considering the ship's hullstructure and radar maintainability.(b) Install scanner away from smoke-stack and mastIf the scanner is installed at the same height as the smoke-stack or mast, radarwaves may be blocked, creating shadow zones or generating false echoes. Therefore,do not install the scanner at such a position.(c) Install scanner forward away from obstacle.To avoid creating shadow zones or generating false echoes, install the scanner ata position nearer to the ship's bow away from obstacles. When installing the scanneron a mast, position it in front of the mast. (If obstacles cannot be avoided for the ship'sstructural reasons, refer to "Shifting away from obstacles" described Page 13.)(d) Do not install the scanner near hot or heat-generating items.Do not install the scanner at a position where it may be subjected to smoke or hotair from smokestacks or heat from lamps.(e) Install the scanner away from antennas of other equipment.Install the scanner as much away from the antennas of a direction finder, radiotransceiver, etc. as possible.To eliminate the interference, install the scanneraway from the antenna of radio transceivers.(f) Make the cable length as short as possible.Keep the distance from the scanner to the display unit within the standard cablelength of 10 m. If you use longer cable for unavoidable reasons, limit the cable lengthto a maximum of 30 m.3.3.2 Display unitThe display unit can be installed on desktop, wall surface, or ceiling. Determine the place toinstall the display unit that is convenient for navigation and radar operation after considering thefollowing suggestions:(a) A place where you can see the ship's bow when you raise your face from theradar screen.(b) A place where there is no direct sun-light to avoid display temperature up.(c) A place where there is good ventilation and minimum vibration.(d) A place where the display unit is apart more than the minimum safe distancefrom a magnet compass as listed in Tab.3-3 below.Tab.3-5 Minimum Safe Distance from Magnetic CompassMaster compass Steering compassScanner unit2.0m 1.4mDisplay unit2.0m 1.4m!CAUTION

133.3.3 Shifting away from obstacles• Shifting from keel lineBy shifting the scanner position from the keel line to the starboard side of theship, it is possible to move shadow zones to the port side which makes it possible tokeep clear vision in the bow direction. The distance to be shifted can be obtained bycalculation depending on the distance from the scanner to obstacles using the follow-ing equation:Ls=0.4R+D/2 [m] (when R<15m)Ls=0.025R+D/2 [m] (when R>=15m)where Ls = distance to be shifted from keel lineD = diameter of obstacle on keel lineR = distance from scanner to obstacle‚ Obtaining sufficient dip angleRaise the scanner position so that there is a sufficient dip angle θ available be-tween the line of sight from the scanner to the obstacle and the horizontal line. Byraising the dip angle above 5°, it is possible to prevent mid- and long-distance shadowzones. The radar cannot detect objects below the line of sight.LsRDScanner UnitObstacleKeel lineFig.3-1 Shifting from keel lineHorizontal lineLine of sightθFig.3-2 Obtaining sufficient dip angle

14●3.4 Installing Scanner Unit When you have decided the place of installation, install the scanner unit. If a mount base likethe one shown below is available, it may be easier to install the scanner. If such a mount base isnot available in your ship, you may install the scanner directly to the roof, etc. In such a case, payattention to the water drain tube located at the bottom of the scanner unit during installation.Note : When the radar mast or mounting bracket has a curvature of more than 2mm, repair it oruse spacers.Referring to Fig.3-4, open holes in diameter of 12 mm (0.47 in.) at five locations in the mountbase and use these holes to fix the scanner unit to the mount base with hexagonal bolts. (Use thetemplate included with this manual.) The bolts included with your radar equipment will sufficefor mount base thickness of 9 to 14 mm (0.35 to 0.55 in.). If the mount base is thicker or thinnerthan this, prepare bolts listed in Tab.3-4.Use sealing of silicon when you prevent the bolts from becoming loose. Radome may be brokenif you use locking putty.Do not use an edge that might trap water.Fig.3-3 Mount baseCenter14014012φ × 560Forward(5.51 in.)(2.36 in.)(0.47 in.)30(1.18in.)For air tube(5.51 in.)Fig.3-4 Hole positions for mounting scanner

15Tab.3-6 Bolts for Mounting Scanner Unit●3.5 Installing Display Unit After you have finished installing the scanner unit, install the display unit in the same way.Choose the proper bolt length according to the thickness of the surface on which you are going toinstall the display unit. Hole diameter is different using bolts from using tapping screw. Whenusing tapping screw, open holes in adequate holes. When using bolts and nuts, open holes in di-ameter of 6 mm (0.24 in.). When you have opened holes, install the pedestal part first and then thedisplay unit.Fix four screwsMount baseWasherSpring washerM10 Hexagonal boltRadome(bottom)ChassisIncluded Fig.3-5 Fixing Scanner UnitThickness ofmount base Bolts necessary tofix radome scanner Material Remarks1-4mm(0.04-0.16 in.) M10 × 15 (1.5mm pitch) Stainless4-9mm(0.16-0.35 in.) M10 × 20 (1.5mm pitch) Stainless9-14mm(0.35-0.55 in.) M10 × 25 (1.5mm pitch) Stainless Included with radar14-19mm(0.55-0.75 in.) M10 × 30 (1.5mm pitch) Stainless36084Fitting hole(14.17 in.)(3.31 in.)Hole diameter 6mm : Bolts and Nuts Adequate : Tapping screwsRecommended screw M5 or equivalentUnit : mm47 (1.85 in.)37 (1.46 in.)60(2.36 in.)240(9.45 in.)60(2.36 in.)ForwardFig.3-6 Hole positions for display unit

16Note : When you install the display by flush mount, refer to appendix "OUTLINE DRAWING".Slide off four triangle corner cover, and fix the display unit to the panel with screws. After fixingthe display unit, put on corner covers to the corner of the display unit. See APPENDIX.Avoid a display from operating under direct sun-light. It becomes high temperature at inside of dis-play and display may be broken.!WARNING

17●3.6 Connecting Cables Lay cables firmly in place by following the instructions below.Note1: Do not bind the cable for the radar collectively with cables of other equipment(especially power supply cable).Note2: Leave clearance near the inlet of the display so you can remove the displayunit easily. This facilitates installation and maintenance of the display unit.(Refer to Appendix 1.)Note3: Because the cable has a connector fitted on the display and scanner side, if it isnecessary to pass cable through a narrow path, fix the scanner-side connectorvertically using vinyl tape before passing cable through the path.Note4: Lay cable along the ship's hull or wall surface and attach it in place at inter-vals of about 40 cm.3.6.1 Interconnecting cable (See Fig.3-8)•Ensure that the radar is off. Connect the cable to the receptacle labeled "SCANNER" onthe rear panel of the display unit.‚Next, remove the upper part of the radome from the scanner unit. Avoid bumping itagainst the antenna by lifting vertically. (There are three fixing screws.)ƒRemove the tape fixing the antenna.„Remove the shield cover located on the astern side. (There are three fixing screws.)…Remove the cable clamping plate and rubber ring, pass cable through the introductionopening, put the rubber ring from both ends of it, and clamp the cable to the scanner unitwith screws via the fixing plate. Plug the connector fitted to the cable into the X1 connec-tor on the PCB.†Replace the aluminum cover. At this time, attach a cable shield onto a ditch with thealuminum cover. However, be careful that the cable will not be caught up between themain unit and cover.‡Replace the upper part of the radome. Be careful not to bump it against the antenna inthe same way as when removing it. Make sure that the cover is fitted in the correctdirection as shown in Fig.3-7. The upper and lower parts of the radome each have threemarkings indicating screw positions. Align the upper and lower positions as you mountthe radome.Fixing screwsShip'sheadingLogo seal onside wallFig.3-7 Fitting cover

18AntennaStern side Shield coverCable shieldRadome (bottom)Fixing plateRubber ringInterconnecting cableFix connector onPCB(X1)X1 (Connect here)Radome (bottom)PCBInner shieldFig.3-8 Fitting interconnecting cable

193.6.2 Grounding wireConnect grounding wire before connecting powersupply cable. Leakage current is too high.Connect grounding wire from the grounding terminal on the rear panel of the display unit tothe ship's hull as shown below.Connect grounding wire from one of the bolts you have attached when installing the scannerunit to the ship's hull as shown in Fig.3-11. (The crimp terminal and grounding wire are not in-cluded with the radar equipment.) SCANNER POWER OPTIONGrounding terminalGrounding wireFig.3-10 Grounding display unit to earthMount baseRadome(bottom)Chassis→ To ship's hullCrimp terminalGrounding wire!WARNINGFig.3-11 Grounding scanner unit to earth

203.6.3 Power supply cablePower is fed through a knife switch ( or circuit breaker) and protective fuses, as shown in be-low.WARNING: Do not apply over 41.6V to Radar or Radar may be broken.Fit the power supply cable (included with your radar) to the receptacle labeled "POWER" onthe rear panel of the display unit. And connect to power supply as followings. (When you do notconnect external equipment, put tape on red and green wire.)Place the Fuse and connection part where there is no water splash and dry area.When extend the power supply cable, use a suitable cable as below.Ship's Power Voltage Cable conductor Cable max. length cross section 12Vdc 3.5 mm23 m6.0 mm25 m24Vdc 2.0 mm26 m3.5 mm210 m●3.7 Adjustment Be sure to operate the following adjustment. If thisis not adjusted properly, the radar picture does notdisplay true image.WhiteBlackGrayGreenRedPower supply cableTo display unitDC+DC-GroundNMEA-NMEA+ To externalequipmentTo power supplyFig.3-12 Power supply cable!CAUTIONGenerator Switchboard Charger StorageBattery12/24VMain switch panel(Knife Switch withFuses)Radar DisplayUnitDC voltagereference points

21When you have finished installing the scanner and display units and connecting cables, turnon the power to the display and scanner units and check to see if they operate normally withoutproblem. Then make adjustments as detailed below and check to see if the units operate normallyagain. Heading direction offsets about 60 degree from scanner heading whenshipped from factory. "‚ HEADING DIRECTION" must be carried out wheninstall the radar.• TUNING Refer to Adjusting tuning circuit in 5.5.4.5.4‚ HEADING DIRECTION Refer to Adjusting angle in 5.5.4.5.4ƒ DISTANCE Refer to Adjusting distance in 5.5.4.5.4●3.8 Connecting External Equipment to Display Unit The display unit has two channels of NMEA input. One is standard in power cable. The otheris necessary to connect optional parts (Junction box with OPTION cable).OPTION connector is located at display’s rear panel for connecting external equipment suchas a GPS, LORAN, or gyro compass. You must have an Junction box with OPTION cable sepa-rately available from Anritsu. (Refer to CHAPTER 8 (4) External interface.)Note: SIN/COS and MOB signals cannot be used on Junction Box.Junction box with OPTION cable (Order No. RZ704A) SCANNER POWER OPTIONOPTION cableJunction box*note POWER cableExternal NMEA equipmentExternal NMEA equipmentGreen ：NMEA-Red ：NMEA+To power supplyOther radar,slave monitor,External buzzer,Gyro I/FOther radar,slave monitor,External buzzer,Gyro I/F,SIN/COS.MOB(NMEA out)Fig.3-13 Connecting external equipment to display unit!WARNING

22●3.9 Countermeasure for Electromagnetic Interference Anritsu radar provides shields in the units and the inter-unit connection cable. When the ra-dar, however, is closely installed to radio equipment such as VHF transceiver, UHF transceiver,etc., or the radar and/or radio equipment are not sufficiently grounded to the hull or ship's earth,the radar may happen to cause EMI trouble.Followings are general procedures for reducing EMI due to radars. When installing radars,refer to them, and also check the radio equipment EMI trouble with operating the radar and radioequipment.(1) Installation Place of RadarThe display unit, scanner unit and inter-unit connection cable should be located apartfrom the main unit, feeder, antenna coupler and antenna of radio equipment as far as possi-ble.Especially, proper installation of the feeder, antenna coupler and antenna of radio equip-ment is very important to improve EMI trouble.(2) Laying Power Supply CablesFollowing connections A and B are recommended to reduce conduction noise generatedfrom radar. Connection C should not be used.Connection A(Very Good)Connection B(Good)Connection C(Bad)(3) GroundingAll equipment should be firmly grounded at the earth nearest hull with copper plates orbraided wires.Improvement Procedure for EMI(1) Confirm grounding on the radar and radio equipment. However, some equipment, onwhich grounding is not always necessarily, have a possibility of EMI improving when tak-ing off their grounding. Try to take off grounding.(2) Confirm power supply cable connections and modify to the connection A or B above.(3) Try to shift the display unit and inter-unit connection cable of radar to be apart from radioequipment.(4) Try to shift the feeder of radio equipment to be apart from each units and the inter-unitconnection cable of radar.(5) Try to shift the antenna coupler and antenna of radio equipment to be apart from thescanner unit and inter-unit connection cable of radar.RADARRADIO EQUIPMENTSHIP'S SUPPLYSHIP'S SUPPLYRADARRADIO EQUIPMENTSHIP'S SUPPLYRADARRADIO EQUIPMENTSHIP'S SUPPLY

23●3.10 When Discarding Your Radar When discarding your RA775UA radar, consult Anritsu or its distributor to get informationon precautions to be followed. Tab.3-5 below lists the primary component materials of theRA775UA radar for your reference.Tab.3-7 Component MaterialsScanner unit Material Display unit MaterialRadomeAESFront panelABSChassisA5052PRear panelADC12BaseADC12PedestalABS+PC

24CHAPTER 4. FUNCTIONS AND NAMESFunction and name of each partThe RA775UA radar consists of a display unit to display video images on a screen and ascanner unit configured with an antenna to radiate radio waves and other components. Thedisplay unit has on its front panel eighteen(18) push-switch keys and one cursor key that letsyou move a cursor in any desired direction. A combination of these keys allows you to utilizeall functions of your radar, providing a comfortable, easy way to operate.●4.1 Key layout Key No. SET1 SET2 SET3 SET41 EBL1 EBL2 RINGS PPI2 VRM1 VRM2 TUNE PPI/3D3 VAR RNG FL EBL2 ST PPI/PPI4 TRACK FL VRM2 ZOOM PPI/NAV5 TARGET GZ SLEEP ALL PPI6 SEL WIN OFF-C PICTURE ALL PPI27 NEXT NEXT NEXT NEXTTab. 5 Function of soft key (Factory setting)*Every time Next key is pressed, soft key group switches as follows. Cursor key MENU key ENT key３１HURANGEUPRANGEDOWNBRILLAUTOGAINSTCFTCMOB 1 2 3 4 5 6 7POWERENTMENUMOTOR１：５８+POWER keySoft keys(* )ＲＡＤＡＲＯＦＦScannerMotor fuseControl knobRANGE Up keyRANGE Down keyBRILL key( ContrastBrilliance, keys backlight)AUTO keyGAIN keySTC keyFTC keyMOB keySET1 → SET2 → SET3 → SET4

25●4.2 Rear panel • Power supply connectorUse this connector to plug in the power supply cable. Standard NMEA interfaceterminal is included in this connector. Refer to Section 3.6 “ Connecting Cables “ andSection 3.8 “Connecting External Equipment to Display Unit “.‚ Grounding terminalUse this terminal to connect grounding wire. Refer to Section 3.6 (3) “Groundingwire”.ƒ Option connectorUse this connector to connect NMEA, an external monitor, external buzzer and GYROI/F. A dedicated cable or dedicated module box is required to connect these pieces ofequipment. Refer to Section 3.8 “Connecting External Equipment to Display Unit”.„ Scanner connectorUse this connector to plug in the inter-connecting cable to connect the scanner unit. Refer to 3.6 “Connecting cable “.●4.3 Radar screen（Single screen） SCANNER POWER OPTIONShip’s positionEBL2VRM2Indicate soft key３１HU Ｌ１：５８+ＲＡＤＡＲＯＦＦＥＢＬ１ＶＲＭ１ＥＢＬ２ＶＲＭ２ＦＬＥＢＬ２ＦＬＶＲＭ２ＮＥＸＴＡＨＯＬＤＺＯＯＭＯＦＦ−ＣLAT/LON35°08．42N139°02．53E2 129．8°2 12．34NM ０．２３ NMHDG １２９．０° TSPD １２．０ＫＴG５９ＳＡＴFATＳＴ１GZ ＩＮTK １５ＳWP１３４．4° １２．５ＮＭ+LAT/LON35°08．42N139°02．53E1 129．8°1 12．34NMTune meterPicture holdZoomOff-centerRangeRange ring intervalDisplay modeHeading angleCruising speedEnlarging echoGuard zoneTrackWay pointEBL1VRM1Pulse widthCourse errorGainSTCFTCCross cursorCross cursor position(LAT/LON or Distance/Bearing）Bearing scale•Power supply connector‚Grounding terminal„Scanner connector ƒOption connector

26●4.4 Radar screen （Dual screen） ex） PPI/PPI screen●4.5 Radar screen （All PPI screen） Tune meterPicture holdIndicate soft keySPD １２．８ＫＴ GZ R IN WAY P １３４．４°HDG １２９．０° GZ L IN １２．５ NM+MK ３８．４° ＳＴ１ＬＡＴ 35°08．42N 2129.8°５．２８ TK １５ＳＬＯＮ 139°02．53Ｅ23.62NM６１．０ HU Ｌ．７５．２５ＥＢＬ１ＶＲＭ１ＥＢＬ２ＶＲＭ２ＦＬＥＢＬ２ＦＬＶＲＭ２ＮＥＸＴＡＨＯＬＤ０．２３XTE ＞＞＞1 129．8°1 12．34NMＡＴ１Ｇ５９／ＡＴＳＡＴ／ＡＴＦＡＴ／ＡＴRange(Left screen) Range(Right screen) Range ring interval Range ring interval (Left screen) (Right screen)Display modePulse widthCross cursorCourse errorEBL1VRM1＋Cruising speed Guard zone(Right screen) Way pointHeading angle Guard zone(Left screen)Cross coursor position Enlarging echo Ship’s position VRM2(LAT/LON or Distance/Bearing) Track EBL2AUTO (Left/Right)Gain (Left/Right)STC (Left/Right)FTC (Left/Right)３１HU ＬGZ IN１：５８+ＲＡＤＡＲＯＦＦＯＦＦ−ＣＨＯＬＤＺＯＯＭOff-centerPicture holdZoomRangeRange ring intervalDisplay modeGuard ZonePulse widthCross cursor

27●4.6 Radar screen （All PPI /PPI screen） ●4.7 Navigation screen It is necessary that navigation equipment such as a GPS is connected to your radar, thisscreen displays the position and cruising speed of your ship, seawater temperature, and othernavigation information.Note: Heading angle will be displayed "COG" when Course Over Ground data is used.Note: Cruising speed will be displayed "SOG" when Speed Over Ground data is used. ＞ Indicates starboarding the helm (right)＜ Indicates porting the helm (left)Picture holdGurad zone(Right screen)Guard zone(Left screen)６１．０ HU Ｌ GZ IN ．７５．２５ GZ IN HOLDRange(Left screen) Range(Right screen) Range ring interval Range ring interval (Left screen) (Right screen)＋Display modePulse widthCross cursorNAV DISPLAYWP 134．4°COURSE12．5NM ＞＞＞HDG 129．0°0．23NMSPD 12．8KTLAT 35°08．42NLON 139．02．53ETEMP 20．5°CDEPTH 93．2MST’BYWay pointHeading angleCruising speedCurrent positionSea water temperatureDepth of waterCourse errorDeviation from courseIndication mark0.00 --＞＜0.02 --＞ or ＜0.04 --＞＞ or ＜＜0.08 --＞＞＞ or ＜＜＜0.16 --＞＞＞＞ or ＜＜＜＜Tab.6 Indication of deviation from course

28CHAPTER 5. OPERATIONBasic operation of radarThe RA775UA radar has several fixed-function keys on the front panel. These functions can becontrolled by simply pressing the key. Also, special functions can be customized to soft-keys byuser-setting. The followings explain the operation of each keys.5.1 Powering On and Off (1) Powering OnPress the "POWER" key. Buzzer sounds "pi" and starts the radar system.Screen contrast and brilliance is set to the level that of the radar system was power off.(2) Powering offKeep pressing the "POWER" key more than 3 seconds, then the radar system will power off.5.2 Adjusting contrast and brilliance of the screen, and key-backlight (1) Press the "BRILL" key. (Bar indicating contrast, brilliance, and key-backlight appears onthe screen.)(2) Adjust each items with the control knob. Items can be selected by up-down cursor.(3) When the adjustment is finished, press either the "BRILL" key or the "ENT" key to exit fromthe adjustment screen. (Pressing some other key after adjustment will lead to the function of thepressed key.) BRILL ―＞ Control knob (Adjustment of contrast) ――＞ BRILL or ENT└＞ Up/Down (Selection of brilliance, key-backlight) └-＞Other function key Move to otherfunctions.75.25HUBRILLIANCE 50CONTRAST 50ST’BY+KEY BACKLIGHT 4

29●5.3 Basic Operations ××× ＝ keys to press5.3.1 Powering On and OffPOWERPress "POWER"key to power on.2 minutes timer and "RADAR OFF" are displayed.Keep pressing "POWER" key to power off.Press the "BRIL" key.BRILLControl bars are indicated on the screen.contrast Up/Down Select contrast.Control knob Adjust contrast with knob.brilliance Up/Down Select brilliance.Control knob Adjust brilliance with knob.key backlight Up/Down Select key backlight.Control knob Adjust key backlight with knob.ENT Press "ENT"key to return.Radar turn into "ST'BY"mode when 2 minutes timer is finished and "ST'BY"displayed.5.3.2 TransmittingPOWERPress "POWER" key to op-erate, radar picture appearson the screen.Another press "POWER" key,radar turn to stand-by mode.Keep pressing "POWER" keymore than 3 seconds, radar turn to power off.RANG UP orPressing "RANGE UP" key produces a long-distance range,RANGE DOWN"RANGE DOWN" key a short-distance range.．７５．２５ＨＵBRILLIAMCE 50CONTRAST 50１：５８RADAR OFF+KEY BACKLIGNT 4AT．７５．２５ＨＵ+SCREENPOWER ONSTARTCHANGERANGE

305.3.3 Adjusting contrast and brilliance of the screen, and key-backlight××× ＝ keys to press(1) Press the "BRIL" key. (Bar indicating contrast, brightness, and panel appears on the screen.)(2) Select contrast, brilliance, or key backlight with the up-down cursor.(3) Adjust each item with the control knob.(4) When the adjustment is finished, press either the "BRIL" key or the "ENT" key to exit fromthe adjustment screen. (Pressing some other key after adjustment will lead to the function of thepressed key.) BRIL ――＞ Control knob (Adjustment of contrast) ――＞ BRIL or ENT└-＞ Up/Down (Adjustment of brightness, panel)└-＞ Other function key Shift to other func-tions5.3.4 Changing Distance Range (RANGE UP, RANGE DOWN)Pressing "RANGE UP" key produces a long-distance range, and "RANGE DOWN" key ashort-distance range.RANGE 0.125 0.25 0.5 0.75 1.5 3 6 12 24Number of rings 222366666Range ring interval 0.0625 0.125 0.25 0.25 0.25 0.5 1 2 45.3.5 Automatic adjustment (AUTO) AUTO adjusts the GAIN, STC and FTC automatically.If the "AUTO" key is pressed while GAIN, STC, or FTC are under manual settings, they will allbe switched to AUTO or HBR(HARBOR) mode.Pressing "AUTO" key, AT1, AT2 and HBR changes alternately. Pressing STC key, all controls returnto manual state.AT1Use when find navigation way in much echo such as port area, narrow channel, smallislands area. The control condition is similar to less STC, slightly down GAIN.AT2Use at open sea to suppress the sea clutter. The control condition is similar to highSTC, high GAIN.HBRUse at in a bay area, inlet, or a harbor. The control condition becomes manual STC byusing the value established HARBOR of ADJUST menu. Note) Refer to “Setting HARBOR STC circuit(HARBOR)” in section 5.5.4.5.4(7). Note) When you select HBR mode, FTC will be switched to MANU mode.* What happens if GAIN, STC, and FTC keys are pressed during AUTO operation?1) If GAIN key is pressed, Only GAIN enters a manual state.2) If FTC key is pressed, Only FTC enters manual state.．７５．２５ＨＵBRILLIANCE 50CONTRAST 50ＳＴ‘ＢＹ+KEY BACKLIGNT 4

313) If STC key is pressed, STC, GAIN, and FTC enter manual state.5.3.6 Sensitivity adjustment (GAIN)(1) When the "GAIN" key is pressed, the GAIN dis-play on the left side of the screen will be reversedas G 35 and the adjustable state will be entered.(2) When the control knob is turned, the figure will beshifted within a range of 0 and 99, and the sen-sitivity can be manually adjusted. When the"AUTO" key is pressed, all (GAIN, STC and FTC)will enter an AUTO state.(3) After the adjustment is finished, press the "GAIN"key to exit from the adjustment state. If someother function key is pressed, shift to that functionwill take place.(a) To make adjustments by MANUAL (When the GAIN key is pressed under AUTO operation,shift to a manual operation will take place.)GAIN ―＞ Control knob ―＞ GAIN --------------- The adjustment state is ended.｜ └＞ Other function key --- Shift to other functions└＞ AUTO └＞ AUTO ---------------- GAIN, STC, and FTC are set at AUTO and theadjustment state is ended.(b) To switch from the MANUAL stateAUTO ----------------------------------------------- Set GAIN, STC and FTC at AUTO5.3.7 Removing sea clutter (STC)(1) When the "STC" key is pressed, the STC display on the left side of the screen will be re-versed as S 35 and the adjustable state will be entered.(2) When the control knob is turned, the figure will be shifted within a range of 0 and 99, andthe STC can be manually adjusted. When the "AUTO" key is pressed, all (GAIN, STC andFTC) will enter an AUTO state.(3) After the adjustment is finished, press the "STC" key to exit from the adjustment state. Ifsome other function key is pressed, shift to that function will take place.(a) To make adjustments by MANUAL (When the STC key is pressed under AUTO operation, shiftto a manual operation will take place.)STC ―＞ Control knob ―＞ STC ----------------- The adjustment state is ended.｜ └＞ Other function key ----- Shift to other functions└＞ AUTO └＞ AUTO ----------------- STC, GAIN, and FTC are set at AUTO and theadjustment state is ended.．７５．２５ＨＵG 50ＳＴ‘Ｂ+

32NOTE) When you select MANU mode, GAIN and FTC will be switched to MANU mode, too.(b) To switch from the MANUAL stateAUTO ----------------------------------------------- Set STC, GAIN and FTC at AUTO5.3.8 Removing rain and snow clutter (FTC)(1) When the "FTC" key is pressed, the FTC displayon the left side of the screen will be reversed as F500 and the adjustable state will be entered.(2) When the control knob is turned, the figure will beshifted within a range of 0 and 99, and the sen-sitivity can be manually adjusted. When the"AUTO" key is pressed, all (GAIN, STC and FTC)will enter an AUTO state.(3) After the adjustment is finished, press the "FTC"key to exit from the adjustment state. If someother function key is pressed, shift to that functionwill take place.(a) To make adjustments by MANUAL (When the FTC key is pressed under AUTO operation, shiftto a manual operation will take place.)FTC ―＞ Control knob ―＞ FTC --------------- The adjustment state is ended.｜ └＞ Other function key --- Shift to other functions└＞ AUTO └＞ AUTO ---------------- GAIN, STC, and FTC are set at AUTO and theadjustment state is ended.(b) To switch from the MANUAL stateAUTO ----------------------------------------------- Set GAIN, STC and FTC at AUTO5.3.9 Man Over Board (MOB)Pressing the MOB key will send the own ship's position data to the external equipmentthrough NMEA port with "WPL" format. There is no change on the screen.To check the MOB position data, select "MOB" from the "WINDOW" menu in the "SETUP".The position of MOB and current position will be displayed on the screen. If press the "MOB" keywhile watching the MOB screen, MOB data will be cleared and return to previous screen. If pressother keys, MOB data will be remained and return to previous screen.．７５．２５ＨＵF 50ＳＴ‘Ｂ+

33●5.4 Functions of Soft Keys ××× ＝ keys to press･Outline of soft keysAny function can be optionally allocated to the key upon which numbers 1-7 are indicated. Amaximum of 4 groups of functions can be allocated to each soft key, and switching between thosefunctions is conducted by the "NEXT" key.5.4.1 Bearing measurement (EBL1)(a) Bearing measurement by EBL1(1) When "EBL1" key is pressed, electric bearing line (EBL1) appears and the angle from thedirection of the ship’s head which is set at 0 °will appear in a reverse display at the lower left ofthe screen(Note).(2) Use the control knob to place the direction cursor on the target, and read the angle.(3) After the settingi) If "EBL1" key is pressed, the setting is completed.ii) If "other function" key is pressed, the function will be shifted to that of the pressed key withthe setting condition still in effect. note: 1 xxx.x ° indicates EBL1.EBL1 ―＞ Control knob ―＞ EBL1 EBL1 is displayed and the process is finished.｜└＞ Other function key EBL1 is displayed and the function is shifted.└-＞ EBL1 EBL1 is turned off.(b)(b) To turn off the EBL1 When the "EBL1" key is pressed twice, EBL1 disappears. (EBL1 OFF)Note: Please refer to "5.5.1.1 Bearing measurement (EBL1)".5.4.2 Bearing measurement (EBL2)The operation is the same as EBL1, please refer to EBL1 operation. The "EBL2" will appear ina reverse display at the lower right of the screen5.4.3 Distance measurement (VRM1)(a) Distance measurement by VRM1(1) When "VRM1" key is pressed, variable range maker (VRM1) appears and the distance in areverse display appears at the lower left of the screen.(2) Place the marker on the front edge of the target with the control knob and read the distance.(3) After the settingi) If "VRM1" key is pressed, the setting is completed.ii) If "other function" key is pressed, the function will be shifted to that of the pressed key with thesetting condition still in effect. note: 1 xxx.x NM indicates VRM1.

34VRM1 ―＞ Control knob ―＞ VRM1 VRM1 is displayed and the process is finished.｜└＞ Other function key VRM1 is displayed and the function is shifted.└＞ VRM1 VRM1 is turned off.(b)(b) To turn off the VRM1 When the "VRM1" key is pressed twice, VRM1 disappears. (VRM1 OFF)Note: Please refer to "5.5.1.2 Determining the distance (VRM1)".5.4.4 Distance measurement (VRM2)The operation is the same as VRM1, please refer to VRM1 operation. The "VRM2" will appearin a reverse display at the lower right of the screen5.4.5 Measuring the angle between two points (FL EBL2)Note: VRM2 and EBL2 do not follow the OFF-C function while floating.Note: Please refer to "5.5.1.5 Measuring the distance or angle between two points ( FL EBL2,FL VRM2 )".(a) Setting a reference point for measurement of the angle.(1) Press "FL EBL2" key. “SET START POINT” is displayed and a small cross mark appears.FL EBL2 −＞ FL EBL2 is turned ON and(Select FL EBL2) the small cross mark appears.(2) Use the left-right and up-down cursor keys to place the small cross mark on one of the twoechoes whose angle will be measured, and press the "ENT" key. Up/Down &Left/Right −＞ ---- ENT Criterion of the reference point is set.(Place the cross cursor on an echo)(b). MeasuringPerform the operations in the above mentioned and "measuring the angle(EBL2)", and placethe EBL2 on another echo.EBL2 is displayed on the screen based on the placed fixed cross cursor." 2 xxx.x°" which is displayed at the lower right will be the angle between the two points.5.4.6 Measuring the distance between two points (FL VRM2)Note: Please refer to "5.5.1.5 Measuring the distance or angle between two points ( FL EBL2,FL VRM2 )".(a) Setting a reference point for measurement of the angle.(1) Press "FL VRM2" key. “SET START POINT” is displayed and a small cross mark appears.

35FL VRM2 −＞ FL VRM2 is turned ON and(Select FL VRM2) the small cross mark appears.(2) Use the left-right and up-down cursor keys to place the small cross mark on one of the twoechoes whose angle will be measured, and press the "ENT" key. Up/Down &Left/Right −＞ ---- ENT Criterion of the reference point is set.(Place the cross cursor on an echo)(b) MeasuringPerform the operations in the above mentioned and "measuring the distance(VRM2)", andplace the VRM2 on another echo.VRM2 is displayed on the screen based on the placed fixed cross cursor." 2 xx. xNM" which is displayed at the lower right will be the distance between the twopoints. 5.4.7 Changing the group of Soft Keys (NEXT)Any function can be optionally allocated to the key upon which numbers 1-7 are indicated. Amaximum of 4 groups of functions can be allocated to each soft key, and switching between thosefunctions is conducted by the "NEXT" key.The "NEXT" key switches between allocated function groups on the soft key which numbers 1-7are indicated.Every time pressing the "NEXT" key, function groups changes to another groups included pressing"NEXT" key. The function groups can also be changed at the "KEY ASSIGNMENT" function in the"CUSTOM" menu of the "SETUP" with left-right cursor key. Operation Soft Key Setting ExampleSET1 SET2 SET3 SET4The function can be changed at the "KEY ASSIGNMENT" function in the"CUSTOM" menu of the "SETUP". 7 7 7NEXT NEXT NEXT 7NEXT 1 3 4 5 2 1 3 4 5 2 1 3 4 5 2 6 6 6EBL1VAR RNGTRACKTARGETVRM1EBL2FL EBL2FLGZVRM2RINGSSTZOOMSLEEPTUNESEL WIN OFF-C PICTURE 7 7 6NEXT NEXT NEXT 1 3 4 5 2 6PPIPPI/PPIPPI/NAVALL PPIPPI/3DALL PPI2 6NEXT

365.4.8 Erasing heading maker temporarily (HDG OFF)Press the “HDG OFF” key. The heading maker is not displayed as long as you hold it down.5.4.9 Using parallel cursors (///CSR)Press the “///CSR” key. Parallel cursors will appear on the screen. As you move EBL, the parallelcursors also move.To cancel the "///CSR" function, press "///CSR" key once more.Note: Please refer to "5.5.1.8 Using parallel cursors (///CSR)".5.4.10 Establishment of the indication of the RANGE RINGS (RINGS)Press the “RINGS” key. Range Rings will appear on the screen. To cancel the "RINGS" function,press "RINGS" key once more.Note: Please refer to "5.5.1.9 Establishment of the indication of the RANGE RINGS (RINGS)".5.4.11 ON/OFF of variable range function (VAR RNG)Usually the range changes in steps as 0.5--0.75--1.5--3.0--....., but using this function will enable aconsecutive change such as 0.5--0.6--0.7--0.8--..... .Press the “VAR RNG” key. The VAR RNG function becomes valid and VAR will be displayedat the upper left of the screen (beside MODE). To cancel the "VAR RNG" function, press "VAR RNG"key once more.The range changes continuously with the up-down cursor while the VAR RNG function is on, andit changes in steps with the "RANGE UP" or "RANGE DOWN" keys.If pressing other keys, return to the normal state from continuously range change state.5.4.12 Changing display modes (MODE)(1) Select MODE from the pull-down display items using the up-down cursor keys, and press the"ENT" key.(2) When the HU/HS/NU/CU/TM sign is displayed beside the MODE item, select display mode withthe up-down cursor keys and press the "ENT" key.(3) The setting will be completed when the "ENT" key is pressed after the selection. (NOTE1,2)Press the "MODE" key, the display mode will change on every pressing to HU, HS, NU, CU, TM inorder. The mode select at the upper of the screen is indicated. However, a setting will be needed for theship’s speed if TM is selected. Also, a heading or a course information is necessary for NU, CU and TM.note: TM is valid only on PPI screen. The mode will change to NU on the other screen automatically.Note: Please refer to "5.5.2.1 Changing display mode (MODE)".5.4.13 Guard Zone (GZ)A function that sets a guard zone of any distance and any angle range, creating alarm tone wheneither echoes above a certain level exist (IN MODE) or no echoes exist(OUT MODE).

37When GZ is operated with soft keys, guard zone settings and ON/OFF settings can be conducted,but the mode (IN or OUT) is to be set in the menu.Note: Please refer to "5.5.2.2 Guard Zone (GZ)".(1) When the "GZ" key is pressed, the present mode setting will be displayed on the left side of thescreen as GZ IN. A small cross cursor for setting the guard zone will be displayed at the screencenter while "SET CENTER POINT" is displayed at the bottom, activating a guard zone settingstate.(2) Use the up-down/left-right cursor keys to move the cross cursor to the center of the warning zoneto be set, and press the "ENT" key.(3) From the cross cursor position set in (2) above as the center, expand the guard zone in thedirection of the distance with the up cursor key and in the direction of the angle with the rightcursor key, thus making the form of a fan. To make the warning zone smaller, operate the downcursor key (in the direction of the distance) and the left cursor key (in the direction of the angle).(4) After the setting the guard zone, finish by pressing the "ENT" key.Press the GZ key twice to cancel the guard zone function.GZ −＞ Up/Down &Left/Right −＞ ENT −＞ Up/Down &Left/Right −＞ ENT Setting completed｜(Setting the center of GZ) (Setting the scope of GZ)└＞ GZ ---------------------------------------------------------------------Canceling GZ・Stop the alarm tonePress the "MENU" key or "ENT" key during the alram tone sounds, alarm tone will stop.note: Set the mode (IN or OUT) at the "GZ MODE" of the "PRESET2" function in the "CUSTOM"menu of the "SETUP"Set the alarm level (IN or OUT) at the "GZ LVL" of the "PRESET2" function in the "CUSTOM"menu of the "SETUP"5.4.14 Off Center (OFF-C)Displaying the location specified by the cross cursor as the ship's locationNote: Please refer to "5.5.2.3 Shifting display in specific direction (OFF-C)".(1) When the "OFF-C" key is pressed, OFF-C is displayed at the upper right and "SET OFF CENTERPOINT" at the bottom of the screen, and setting is ready to be entered.(2) Move the cross cursor with the cursor keys to move the ship to the intended location, and pressthe "ENT" key. The ship's location will be displayed as the cursor's location. OFF-C is displayedat the upper right , which indicates that the "OFF-C" state is entered.(3) To cancel "OFF-C" function, press the "OFF-C" key.(a) To conduct the settingOFF-C −＞ Up/Down & Left/Right −＞ ENT --------Conduct Off Center to exit the adjustment state. Note: VRM2 and EBL2 do not follow the OFF-C function while floating.The function operate on PPI screen only.(b) To cancel the setting

38OFF-C -----------------------------------The "OFF-C" display at the upper right disappears and functionreturns to the ordinary state from the Off Center state.5.4.15 Setting of the SLEEP function(SLEEP)This function sends a 30-second-transmissions during pre-fixed hours. After a transmission, apower-saving mode is entered with the screen in ST'BY state (the scanner-OFF state) and the LCDbacklight turned off. This action is repeatedly executed.Usage example, set a guard zone and have the warning signal automatically confirmed everyprefixed period.Press the "SLEEP" key. Every pressing the key, "SLEEP" function will be set as 5-minutes, 10-minutes, 15-minutes, or off. When a transmission is conducted after setting a SLEEP mode, a ST'BY state is entered and thebacklight turns off after a 30-second-transmission. (Power-saving mode). Two minutes before thefixed time the backlight turns on and the 2-minute timer starts. Then, at the fixed time another 30-second-transmission begins. This series of actions are repeated. If any one key is pressed during thecourse of this action, the SLEEP function will be canceled.Note: Please refer to "5.5.2.4 Setting of the SLEEP function(SLEEP)".(1) Setting procedureSLEEP -＞(Select 5min.) → ENT →POWER -＞ 30-second-transmission every 5 min. └ transmission ONSLEEP -＞(Select 10min.) → ENT → POWER -＞ 30-second-transmission every 10 min. └ transmission ONSLEEP -＞(Select 15min.) → ENT → POWER -＞ 30-second-transmission every 15 min. └ transmission ONSLEEP -＞(Select OFF) --------------------------------------- SLEEP function is turned OFFSetting completed5.4.16 Tuning adjustment (TUNE)(1) When the "TUNE" key is pressed, the TUNE display on the upper-right side of the screenwill be reversed as 35 and the adjustable state will be entered.(2) When the control knob is turned, the figure will be shifted within a range of 0 and 99,and the receiver tuning can be manually adjusted.(3) After the adjustment is finished, press the "ENT" key to exit from the adjustment state.If some other function key is pressed, shift to that function will take place.

39TUNE ―＞ Control knob ―＞ TUNE or ENT ------- The adjustment state is ended.(tuning adjustment) └＞ Other function key --- Shift to other functionsNote: Use the "MENU" to return auto-tuning state.Note: Please refer to "5.5.3.4 Adjusting receiver tuning (TUNE)".5.4.17 Echo expansion (ST)Expanding the echo to the direction of the distance.When the "ST" key is pressed, "ST1" is displayed on the left side of the screen and the state of echoexpansion is entered. This changes the picture to display echoes expanding in the direction of thedistance. Two types of echo expansion exist, which are alternated as follows , every time this key ispressed.Note: Please refer to "5.5.3.5 Echo expansion (ST)".ST1 → ST2 → OFF （Expansion rate ST1 < ST2 ）Note: The "OFF" state is not displayed on the screen and the "ST2" display disappears.5.4.18 Displaying locus of target (TRACK)When the "TRACK" key is pressed, "TK 15SEC" is displayed on the left side of the screen and trackmode is entered. 15S indicates the length of the track, and displays a maximum of 15-second-longsailing track.Note: Please refer to "5.5.3.6 Displaying locus of target (TRACK)".Every time this key is pressed, the course length switches as follows. １５ sec → ３０ sec → １ min → ３ min → ６ min → ＣＯＮＴ → ＯＦＦNote: The "OFF" state will not displayed on the screen and the "TK xx " display will disappear.5.4.19 Enlarging selected areas (ZOOM)The video image centering around the cross cursor is doubled as it is displayed on the screen.Press the "ZOOM" key to "ZOOM" ON. A small cross cursor for setting and "SET ZOOM POINT"are displayed at the screen center and at the bottom respectively, and the magnification point is to beset. Use cursor keys to move the cross cursor to the point to be magnified, press the "ENT" key andthe setting is completed. The area around the cross cursor is displayed in 2x magnification, withblinking "ZOOM" displayed at the screen upper right, indicating that a ZOOM display is beingconducted.To cancel the ZOOM function, press the "ZOOM" key again or change the range scale.Note: Please refer to "5.5.3.7 Enlarging selected areas (ZOOM)".

40ZOOM −＞ Up/Down &Left/Right −＞ ENT ZOOM Ssetting(Move cross cursor)└＞ (Select OFF) −＞ ZOOM --------- ZOOM caceledNote1: VRM2 and EBL2 do not follow the ZOOM function during a floating state.Note2: Normal screen returns when you change the range scale.Note3: ZOOM function is unusable in 3D/PPI screen.Note4: ZOOM function is unusable in OFF-C.Note5: Center of ZOOM can be set any desired position within the set range.5.4.20 Increasing sensitivity (S/L)The pulse width is automatically changed as you change the range. However, if you want toincrease sensitivity, you can choose sensitivity from two pulse lengths. The short pulse (SHORT)gives you sharp images with high distance resolution. The long pulse (LONG) provides highsensitivity and shows targets in large size for easy identification although distance resolution isreduced.Press the "S/L" key to select the Pulse length(LONG or SHORT). The pulse length changesL(Long) and S(Short) alternately.Note: Please refer to "5.5.3.8 Increasing sensitivity (S/L)".S/L −＞ (Select SHORT) −＞ Set to short pulse └＞ or (Select LONG) −＞ Set to long pulse5.4.21 Switching the screen (SEL WIN)Switching to the desired screen for activation on a 2-screen display(PPI+PPI).When change the range, or adjust the GAIN, STC, or FTC, or control the VRM, EBL, select the desiredscreen first.ex.) To be used for switching the range on the PPI+PPI screen.When the "SEL WIN" key is pressed, the range of the selected screen will be displayed in reverse,indicating that the screen is active.Note: Please refer to "5.5.4.2 Switching screens on PPI/PPI screen ( SEL WIN )".SEL WIN −＞ (Select right screen) −＞ Right screen activated └＞ or (Select left screen) −＞ Left screen activatedIf VRM1 is controlled on the screen that is oposit from current VRM1 displayed screen, VRM1 ismoved and displayed to activated screen. The EBL1, EBL2, and VRM2 is the same manner.5.4.22 Reversing the screen (PICTURE)The LCD display is affected by weather, temperature, and day / night environment conditions. Insome cases, you may find the LCD display is easier to view when the entire screen is reversed.

41Press the "PICTURE " key, a normal display will appear if reverse display has been selected, and areverse display if normal display selected.Note: Please refer to "5.5.4.3 Reversing the screen (PICTURE)".5.4.23 Change to PPI screen ( PPI )Press the "PPI" key, the screen will change to PPIscreen.Use to change the screen from other modes to PPI.5.4.24 Change to SEMI3D/PPI screen ( SEMI3D )Press the "SEMI3D" key, the screen will change toSEMI3D/PPI screen.Use to change the screen from other modes toSEMI3D/PPI.Note: All controls, such as EBLs, VRMs effects both screen.The ZOOM, OFF-C, FL EBL2, and FL VRM2 could not be used on this mode. The "SEMI3D" screen displaysthe center as ship's heading always.5.4.25 Change to PPI/PPI screen ( PPI/PPI )Press the "PPI/PPI" key, the screen will change toPPI/PPI screen. Use to change the screen from othermodes to PPI/PPI.Note:(1) The radar picture is refreshed with two scanninginterval for each screen. Right screen picture is holdedduring refreshing left screen, left screen holded duringrefreshing right screen. When your ship navigates inhigh speed, use PPI screen to get fast refreshing picture.LEFT screen /―――/・・・・・・/―――/・・・・・・/―――/・・・・・・ｔime→RIGHT screen ・・・・・・ /―――/・・・・・・/―――/・・・・・・/―――/ (2) The ZOOM, OFF-C, FL EBL2, and FL VRM2 could not be used on this mode.(3) The range, GAIN, STC, FTC, GZ can be used independently for selected window with "SEL．７５．２５ＨＵ＋PPI screen．７５．２５ＨＵＳ＋280 320 000 040 080SEMI3D/PPI screen．７５．２５ＨＵＳ２４６＋Ｇ 55/35Ｓ 35/ATＦ 35/ATＰＰＩ／ＰＰ I screenrefreshing radar pictureholding previous picture

42WIN".Selected window is that the range displayed in reverse character. Please refer to "SEL WIN".(4) The cross cursor can be controlled on selected window.5.4.26 Change to PPI/NAV screen ( PPI/NAV )Press the "PPI/NAV" key, the screen will change toPPI/NAV screen.Use to change the screen from other modes toPPI/NAV.Note: The ZOOM, OFF-C, FL EBL2, and FL VRM2 could notbe used on this mode.5.4.27 Change to ALL PPI screen ( ALL PPI )Press the "ALL PPI" key, the screen will change to ALLPPI screen.Use to change the screen from other modes to ALL PPI.Note:(1) The range, rings interval, display mode are displayed on theupper left of the screen.(2) Return to PPI screen mode pressing a key except MENU,range UP or DOWN, or POWER key.5.4.28 Change to ALL PPI/PPI screen ( ALL PPI2 )Press the "ALL PPI2" key, the screen will change toALL PPI/PPI screen.Use to change the screen from other modes to ALLPPI/PPI.Note:(1) The range, rings interval, display mode are displayed onthe upper left of each screen.(2) Return to PPI/PPI screen mode pressing a key exceptMENU, range UP or DOWN, or POWER key.(3) The radar picture is refreshed with two scanninginterval for each screen. Right screen picture is holdedduring refreshing left screen, left screen holded during refreshing right screen. When yourship navigates in high speed, use PPI screen to get fast refreshing picture.．７５．２５ＨＵＳ＋NAV ＤＩＳＰＬＡＹWAY P １２３．４° ６．８ＮＭCOURSE ２．３８ＮＭXTE ＜＜＜HDG ２６７．３°ＴSPD １２．８ＫＴTEMP ２０．８° ＣDEPTH ５８．３ MLAT/LON ３４°０８．２２Ｎ１３８°０２．５３ＥPPI/NAV screen．７５．２５ＨＵ＋ ALL PPI screen．７５．２５ＨＵＳ．２５．１２５＋ALL PPI/PPI screen

43●5.5 MENU Operation ･List of MENUList of Main MenuMARK(MAIN-MENU)NAV(MAIN-MENU)ECHO(MAIN-MENU)SETUP(MAIN-MENU)EBL1 ON/OFF GAIN AUTO/MANVRM1 ON/OFFMODE HU/HS/NU/CU/TM（MANU/NMEA）STC AUTO/MAN/HARBOREBL2 ON/OFF GZ ON/OFF FTC AUTO/MANWINDOW PPI/SEMI3D+PPI/PPI+PPI/PPI+NAV/ALL PPI/ALL PPI+PPI/MOBVRM2 ON/OFF OFF-C ON/OFF TUNE AUTO/MAN SEL WINFL EBL2 ON/OFF ST OFF/ST1/ST2 PICTURE DAY/NIGHTFL VRM2 ON/OFF SLEEP OFF/5min/10min/15min SYSTEM CHECKHDG OFF OFF TRACK OFF/15SEC/30SEC/1MIN/3MIN/6MIN/CONT///CSR ON/OFF ZOOM ON/OFFRINGS ON/OFF SL SHORT/LONGVAR RNG ON/OFFTARGETCUSTOM KEY ASSIGNMENTPRESET1 (SUB-MENU)PRESET2 (SUB-MENU)ADJUST (SUB-MENU)+MK LINE ON/OFFList of Custom MenuPRESET1 (SUB-MENU) PRESET2 (SUB-MENU)HM FLSH ON/OFF GZ LEVEL 1∼7STERN M ON/OFF GZ MODE IN/OUTNORTH M ON/OFF HOLD ON/OFFST’BY NAVI/NOR DISPLAY RDR/MONI/NAVBUZ VOL OFF/LOW/HIGH EXT BUZ OFF / CONT / INTRM UNIT NM / KM / SM IN P/R 1080/1024/2048/4096/360DEPTH M / FT / FM OUT P/R 1080/1024/2048/4096/360TEMP °C / F DEMO ON / OFFEBL BRG REL / TRUE / MAG IR OFF / IR1 / IR2WP BRG TRUE / MAG SPD SET NMEA / MANU 0.0 KTHEAD INPUT NMEA / SIN・COS /12BIT / 10BIT LANGUAGE 15 countriesHEAD TRUE / MAG+MK MODE DIST・BRG / LAT・LONP TABLE 0 ∼ 2ADJUST (SUB-MENU)TIMING ADJHEAD ADJTUNING CAL.ANTENNA 1∼9AUTO GAIN 1∼30AUTO STC 1∼16HARBOR 1∼16+ＳＴ‘Ｂ．７５．２５ＨＵＳＴＣＦＴＣＴＵＮＥＳＴTRACKZOOMS/L▼▼▼▼▼▼▼ＭＡＲＫＮＡＶＥＣＨＯＳＥＴＵＰＥＣＨＯＧＡＩＮ▼▼ MAN AUTOMAIN-MENUSUB-MENU

445.5.1 Mark Menu××× ＝ keys to press Setting for markers and cursors･Common operations for the MARK menu (Up to the point when "MARK" menu is selected from the main menu)Press the "MENU" key and select "MARK" from the displayed 4 main menus using the left-rightcursor. (The contents of the selected MENU will appear on a pull-down display in accordance with themovement of the left-right cursor.)MENU ――＞ Left/Right (Select MARK)Further explanation about the MARK menu will be conducted on the assumption that this "commonoperation for the MARK menu" has already been completed.5.5.1.1 Bearing measurement (EBL1)(1) Select EBL1 from the pull-down display items using the up-down cursor key, and press the "ENT"key.(2) When the ON/OFF sign is displayed beside the EBL1 item, select ON with the up-down cursor keysand press the "ENT" key.(3) When the "ENT" key is pressed, electric bearing line(EBL1) appears and the angle from the direction of theship’s head which is set at 0 degree will appear in areverse display at the lower left of the screen.(4) Place the marker on the center of the target with thecontrol knob and read the bearing. Then, the displaysetting for EBL1 will be completed either (a)with theEBL1 display still on the screen if the "ENT" key ispressed, or (b)without the EBL1 display if the "MENU"key is pressed. (c)Pressing another function key willlead to the function of that key with the EBL1 displaystill on the screen.Note: 1 ×××．×°indicates EBL1.Up/Down −＞ ENT −＞ Up/Down −＞ ENT −＞ Control knob −＞ ENT (a)(Select EBL1) (Select ON) (EBL1 operation) └＞ MENU (b)└＞ Other function key (c)Note: The displayed EBL angle is relative to heading or true to north, depends on the setting of"EBL BRG" in the "SETUP" menu.ＭＡＲＫＥＢＬ１ＶＲＭ１ＥＢＬ２．７５．２５ＨＵＮＡＶＥＣＨＯＳＥＴＵＰＭＡＲＫ▼▼▼▼▼▼▼ ０．２３Ａ．７５．２５ＨＵ+1 0.0°ＯＦＦＯＮ

455.5.1.2 Determining the distance (VRM1)(1) Select VRM1 from the pull-down display items usingthe up-down cursor key, and press either the "ENT"key.(2) When the ON/OFF sign is displayed beside the VRM1item, select ON with the up-down cursor keys andpress the "ENT" key.(3) When the "ENT" key is pressed, the variable rangemarker1 (VRM1) and the distance in a reverse displayappears at the lower left of the screen (See Note), andthe display is set for VRM1.(4) Place the marker on the front edge of the target withthe control knob and read the distance. Then, thedisplay setting for VRM1 will be completed either(a)with the VRM1 display still on the screen if the"ENT" key is pressed, or (b)without the VRM1 displayif the "MENU" key is pressed. (c)Pressing anotherfunction key will lead to the function of that key withthe VRM1 display still on the screen.Up/Down −＞ ENT −＞ Up/Down −＞ ENT −＞ Control knob −＞ ENT (a)(Select VRM1) (Select ON) (VRM1 operation) └＞ MENU (b)└＞ Other function key (c)Note: 1 ××．××NM indicates VRM1.5.5.1.3 Bearing measurement (EBL2)Refer to the section “Bearing measurement (EBL1)”.The "EBL2" will appear in a reverse display at the lower right of the screen.Note: 2 ×××．×°indicates EBL2.5.5.1.4 Determining the distance (VRM2)Refer to the section “Determining the distance (VRM1)”.The "VRM2" will appear in a reverse display at the lower right of the screen.Note: 2 ××．××NM indicates VRM2.5.5.1.5 Measuring the distance or angle between two points ( FL EBL2, FL VRM2 )Determining the distance (VRM2)(a) Preparation for the measurement(1) Use the up-down cursor keys to select FL VRM2 from among the pull-down display items, andpress the "ENT" key.(2) Use the up-down cursor keys to select ON from the ON/OFF display beside the FL VRM2 items,and press the "ENT" key. “SET START POINT” is displayed and a small cross mark appears.(Once this is set, the "ON" state continues unless changes are made.)Up/Down −＞ ENT −＞ Up/Down −＞ ENT ------------------ FL VRM2 is turned ON and(Select FL VRM2) (Select ON) the small cross mark appears.．７５．２５ＨＵ+1 0.00NM

46(b) Setting a reference point for measurement of the distanceUse the left-right and up-down cursor keys to place the small cross mark on one of the two echoeswhose distance will be measured, and press the "ENT" key. Up/Down &Left/Right −＞ ENT ------------ Criterion of the reference point is set.(Place the cross cursor on an echo)(c) MeasuringPerform the operations in the above mentioned "Common operation for the MARK menu" and"measuring the distance(VRM2)", and place the VRM2 on another echo.VRM2 is displayed on the screen around the placed fixed cross cursor." 2 xx. xNM" which is displayed at the lower right will be the distance between the two points.Note: EBL2 and VRM2 are not follow to "ZOOM" and "OFF-C" function.5.5.1.6 Measuring the angle between two points (FL EBL2)(a) Preparation for the measurement(1) Use the up-down cursor keys to select FL EBL2 from among the pull-down display items, andpress the "ENT" key.(2) Use the up-down cursor keys to select ON from the ON/OFF display beside the FL EBL2 items,and press the "ENT" key. “SET START POINT” is displayed and a small cross mark appears.(Once this is set, the "ON" state continues unless changes are made.)Up/Down −＞ ENT −＞ Up/Down −＞ ENT ------------------ FL EBL2 is turned ON and(Select FL EBL2) (Select ON) the small cross mark appears.(b) Setting a reference point for measurement of the angle.Use the left-right and up-down cursor keys to place the small cross mark on one of the two echoeswhose angle will be measured, and press the "ENT" key. Up/Down &Left/Right −＞ ENT -- Criterion of the reference point is set.(Place the cross cursor on an echo)(c) MeasuringPerform the operations in the above mentioned "Common operation for the MARK menu" and"measuring the distance(EBL2)", and place the EBL2 on another echo.EBL2 is displayed on the screen based on the placed fixed cross cursor. ．７５．２５ＨＵ2 0.72NMplace the VRM2on another echocenter ofVRM2 SET START POINT．７５．２５ＨＵmeasure the distancebetween two targetssmall cross markcross markFL VRM2 indication of VRM2

47" 2 xx. xx°" which is displayed at the lower right will be the angle between the two points.Note: The displayed EBL angle is relative to heading or true to north, depends on the setting of"EBL BRG" in the "SETUP" menu.5.5.1.7 Erasing heading maker temporarily (HDG OFF)(1) Use the up-down cursor key to select HDG OFF fromamong the pulled down and displayed items.(2) Press the “ENT” key. The heading maker is notdisplayed as long as you hold it down.Up/Down −＞ ENT ---------- The heading maker is not displayed as long as you hold “ENT” key down.(Select HDG OFF)5.5.1.8 Using parallel cursors (///CSR)Normally EBL is used to measure the exact bearing from the position of your ship to a target.However, you can also use parallel cursors.(1) Use the up-down cursor key to select ///CSR from amongthe pull-down and display items, and press the “ENT”key.(ON/OFF display beside the ///CSR item)(2) Use the up-down cursor key to select ON .(3) Press the “ENT” key. Parallel cursors will appear on thescreen. As you move EBL, the parallel cursors also move. To cancel the ///CSR function, either select OFF in (2).Up/Down −＞ ENT −＞ Up/Down (Select ON) −＞ ENT -----------------Parallel cursor appears(Select ///CSR) └＞ Up/Down (Select OFF)−＞ ENT -------------Parallel cursor non-appearsNote: Interval of ///CSR same as fixed range maker.///CSR moves with EBL1. ．７５．２５ＨＵ．７５．２５ＨＵNot displayed while ENT keyis held down.2 20.３°FL EBL2 SET START POINT．７５．２５ＨＵOrigin of EBL2measure the angle between two pointsindication ofEBL2small cross markcross mark．７５．２５ＨＵEBL1Parallel cursor

485.5.1.9 Establishment of the indication of the RANGE RINGS (RINGS)(1) Use the up-down cursor key to select RINGS from among the pull-down and display items, and pressthe “ENT” key.(ON/OFF displayed beside the RINGS item)(2) Use the up-down key to select ON or OFF and press the “ENT” keySelect ON Range Rings ONSelect OFF Range rings OFFUp/Down −＞ ENT −＞ Up/Down (Select ON) −＞ ENT ------------------Range rings appears(Select RINGS) └＞ Up/Down (Select OFF)−＞ ENT -------------- Range rings non-appears･Number of range rings and range intervalRange 0.125 0.25 0.5 0.75 1.5 3 6 12 24Number of Rings 222366666Interval 0.0625 0.125 0.25 0.25 0.25 0.5 1 2 45.5.1.10 Variable range function ( VAR RNG )Usually the range changes in steps as 0.5--0.75--1.5--3.0--....., but using this function will enable aconsecutive change such as 0.5--0.6--0.7--0.8--..... .(1) Use the up-down cursor keys to select VAR RNG from among the pulled down and displayed items,and press the "ENT" key.(2) When ON is selected with the up-down cursor key from the ON/OFF display beside the VAR RNGitem, and the "ENT" key is pressed, the VAR RNG function becomes valid and VAR will bedisplayed at the upper left of the screen (beside MODE). Setting procedureUp/Down −＞ ENT −＞ Up/Down (Select ON) −＞ ENT VAR RNG function is turned ON (Select VAR RNG) └＞ Up/Down (Select OFF) −＞ ENT VAR RNG function is turned OFF(3) The range changes continuously with pressing the up-down cursor while the VAR RNG function ison, and it changes in steps with the "RANGE UP" or "RANGE DOWN" keys. Method of useUp/Down ----------------------------- Range changes continuously．７５．２５ＨＵ．７５．２５ＨＵRange rings ON Range rings OFF

49RANGE UP &RANGE DOWN ------------ Range changes in step(4) To cancel the vari-range function, press a key except "RANGE UP" and "RANGE DOWN" key.When use the function, follow from (1) again.5.5.1.11 Output the position data of Cursor ( TARGET )Place the cross cursor to the position that is to output position data with up-down and left-right key.Use the up-down cursor keys to select TARGET from among the pull-down display items, and pressthe "ENT" key. The L/L data of the position will be output to NMEA port with TLL format.Up/Down −＞ＥＮＴ･･･････････････････････ output the L/L position of the cursor(Select TARGET)Note: When activate this function, nothing happened on the screen.5.5.1.12 Follow the Distance and Bearing marker on the cursor (+MK LINE)(1) Use the up-down cursor keys to select +MK LINE from among the pulled down and displayed items,and press the "ENT" key.(2) When ON is selected with the up-down cursor key from the ON/OFF display beside the +MK LINEitem, and the "ENT" key is pressed, the +MK LINE function becomes valid, and distance/bearingmarker will be displayed at the cross cursor. Setting procedureUp/Down −＞ ENT −＞ Up/Down (Select ON) −＞ ENT +MK LINE function is turned ON (Select +MK LINE) └＞ Up/Down (Select OFF) −＞ ENT +MK LINE function is turned OFF(3) The distance/bearing marker follows to the cross cursor until +MK LINE function is turned OFF. ．７５．２５ＨＵ．７５．２５ＨＵ+MK POS 230.0° 0.47+MK POS 230.0° 0.47+MK LINE ＯＦＦ +MK LINE ＯＮThe distance/bearing marker follows to crosscursor. EBLs and VRMs can be used separately.

505.5.2 Nav (Navigation) Menuxxx = keys to pressRadar functions for navigation aid are in this menu.Common operations for the NAV menu (Up to the point when "NAV" menu is selected from the main menu)Press the "MENU" key and select "NAV" from the displayed 4 main menus using the left-right cursor.(The contents of the selected MENU will appear on a pull-down display in accordance with themovement of the left-right cursor.)MENU →Left/Right (Select NAV)Further explanation about the NAV menu will be conducted on the assumption that this "commonoperation for the NAV menu" has already been completed. 5.5.2.1 Changing display mode (MODE)(1) Select MODE from the pull-down display items using the up-down cursor key, and press eitherthe "ENT" key.(2) When the MODE sign is displayed beside the MODE item, select a mode with the up-downcursor keys and press the "ENT" key.(3) The display mode indicates upper-left on the screen.UP/DOWN --> ＥＮＴ --> UP/DOWN（Select MODE）|--> (Select HU）--> ＥＮＴ･･･････････ＨＵ（Head up）|--> (Select HS）--> ＥＮＴ･･･････････ＨＳ（Head set）|--> (Select NU）--> ＥＮＴ･･･････････ＮＵ（North up）|--> (Select CU）--> ＥＮＴ･･･････････ＣＵ（Course up） --> (Select TM）--> ＥＮＴ･･･････････ＴＭ(True motion)Note1: Navigation equipment (gyrocompass, magnet compass, or GPS) must be connected to yourradar in NU, CU and TM modes.Note2: In TM modes it is necessary to set as follow (1) or (2).(1) Input of speed information from NMEA. (2) Set your ship’s speed manually.Note3: TM works only on PPI screen, NU is used automatically for the other screens.MARK MODE >GZ >OFF-C >SLEEP >.75.25HU LNAV ECHO SETUPNAVIGATION>>> 0.23 NMATHUHSNUCUTM

51 5.5.2.2 Guard Zone (GZ)A function that sets a guard zone of any distance and any angle range, creating alarm tone wheneither echoes above a certain level exist (IN MODE) or no echoes exist(OUT MODE). Setting guard zone(1) Select GZ from the pull-down display items using the up-down cursor keys, and press the “ENT”key. ON/OFF sign is displayed beside the GZ item.Up/Down → ENT -----------------------------------------------------------------------ON/OFF sign is displayed.(2) Select “ON” by “common operation for the GZ menu”,and press the “ENT” key.(3) The present mode setting will be displayed on the leftside of the screen as GZ IN. A small cross cursor forsetting the guard zone will be displayed at the screencenter while "SET CENTER POINT" is displayed atthe bottom, activating a guard zone setting state.(4) Use the up-down and left-right cursor keys to move the cross cursor to the center of thewarning zone to be set, and press the "ENT" key.(5) From the cross cursor position set in (4) above as the center, expand the guard zone asfollows.(6) After the setting the guard zone, finish by pressing the "ENT" key. To cancel the guard zone function, select “OFF” by“common operation for the GZ menu”, and press the“ENT” key.ENT → Up/Down &Left/Right →ENT → Up/Down &Left/Right → ENT ---------------------------------------------Setting completed(Setting the center of GZ) (Setting the scope of GZ)GZ INSET CENTER POINTThe central position of the guard zone.With this point as the center, the zonecan be expanded in the directions of thedistance and the angle with the upperand right cursor keys respectively.Expand with the right cursor key in thedirection of the angle. Use the leftcursor key to make the zone smaller.Expand with the up cursor key in the directionof the distance. Use the down cursor key tomake the zone smaller.The mode (IN or OUT) is displayed when the state is ON.Nothing is displayed when it is OFF.GZ IN

52Stop the alarm toneWhen the alarm sounds, press any key to stop. But the guard zone function is still working, thealarm may sounds again. To "OFF" the guard zone function, select "OFF" from GZ menu.Note1: To switch the IN or OUT mode, refer to “Guard Zone Mode” in section 5.5.4.5.3 “Changing thecontent of settings 2 (PRESET2)”Note2: To set the guard zone level, refer to “Guard Zone LeveL” in section 5.5.4.5.3 “Changing thecontent of settings 2 (PRESET2)”5.5.2.3 Shifting display in specific direction (OFF-C)Displaying the location specified by the cross cursor as the vessel's location.(1) Select OFF-C from the pull-down display items using up-down cursor key, and press the"ENT" key.(2) When the ON/OFF sign is displayed beside the OFF-C item, select ON with the up-downcursor keys and press the "ENT" key.(3) OFF-C is displayed at the upper right and "SET OFF CENTER POINT" at the bottom of thescreen, and setting is ready to be entered. Move the cross cursor with the cursor keys tomove the ship’s to the intended location, and press the "ENT" key. The ship’s location will bedisplayed at the cursor's location. The display at the upper right will be normalized from thereverse state, which indicates that the "OFF-C" state is entered.(4) To cancel “OFF-C” function, either select OFF in (2)Up/Down → ENT → Up/Down(Select OFF-C) → (Select ON) ENT →Left/Right &Up/Down →ENT ----Set OFF-C→ (Select OFF) ENT ----------------------------------------- Cancel OFF-CNote: VRM2 and EBL2 do not follow the OFF-C function while floating.The function operates only on PPI screen.5.5.2.4 Setting of the SLEEP function(SLEEP)This function sends a 30-second-transmissions during pre-fixed hours. After a transmission, apower-saving mode is entered with the screen in ST'BY state (the scanner-OFF state) and the LCDbacklight turned off. This action is repeatedly executed.Usage example, set a guard zone and have the warning signal automatically confirmed everyprefixed period. .75 .25 HU.75.25HUSET OFF-C POINTOFF-CMove the cross cursor indicates "OFF-C" state is entered

53(1) Use the up-down cursor keys to select SLEEP from among the pull-down display items, andpress the "ENT" key.(2) When the OFF/5min/10min/15min display has appeared beside the SLEEP item, select a time tobe set with the up-down cursor keys.(3) Press the "ENT" key and the setting is completed. When the SLEEP function is to be canceled,select OFF in (2).When a transmission is conducted after setting a SLEEP mode, a ST'BY state is entered and thebacklight turns off after a 30-second-transmission. (Power-saving mode). Two minutes before thefixed time the backlight turns on and the 2-minute timer starts. Then, at the fixed time another30-second-transmission begins. This series of actions are repeated. If any one key is pressedduring the course of this action, the SLEEP function will be canceled.(a) Setting procedureUp/Down → ENT → Up/Down → (Select OFF) → ENT ----------------------------- SLEEP function is turned OFF(Select SLEEP) → (Select 5min.) → ENT → POWER --------30-second-transmission every 5 min.→ (Select 10min.) → ENT → POWER ------30-second-transmission every 10 min.→ (Select 15min.) → ENT → POWER ----- 30-second-transmission every 15 min.TransmissionSetting completed(b) Action after settingSLEEP setting（5min.）（Operation） ⇓ ⇑(Under Tx） ⇑(Under power-saving mode）⇑（2min. timer in use）⇑ (Under Tx）⇑ (Under power-saving mode）0 sec. 30 sec. 3 min. 5min. 5and a half min. （Time used）TX Start TX OFF Backlight ON Tx Start TxOFF （Action）Countdown start-- What happens if a key is pressed after a SLEEP mode setting?If a transmission is conducted and a key is pressed after setting a SLEEP mode, power-savingmode is entered 30 seconds after key is pressed.-- What happens if a key is pressed during the SLEEP mode?a) If a key is pressed during the power-saving mode, the SLEEP function is canceled and the 2-minute timer starts.b) If a key is pressed while the 2-minute timer is in use, or during transmission , the SLEEP functionis canceled.

545.5.3 Echo Menu××× ＝ keys to pressAdjustment options to be conducted on the echoes displayed on the screen・Common operations for the ECHO menu (Up to the point when "ECHO" menu is selectedfrom the main menu)Press the "MENU" key and select "ECHO" from the displayed 4 main menus using the left-rightcursor. (The contents of the selected MENU will appear on a pull-down display in accordance withthe movement of the left-right cursor.)MENU ――＞ Left/Right (Select ECHO)When the above-mentioned operations have been conducted, the items of the ECHO menu arevertically displayed.Further explanation about the ECHO menu will be conducted on the assumption that this"common operation for the ECHO menu" has already been completed.5.5.3.1 Sensibility adjustment (GAIN)(1) Use the up-down cursor keys to select GAIN from among the pull-down display items, andpress either the "ENT" key or the right cursor key.(2) Select MANU from the MANU/AUTO display beside the GAIN item using the up-down cursorkeys, and press the "ENT" key.(3) The present state of GAIN is displayed in reverse on thescreen left as G 35 and an adjustable state is entered.When the control knob are operated in this state, the figurealternates within a range of 0 and 99 and the GAIN can thusbe adjusted.(4) The adjustment is completed by pressing the "ENT" keyafter adjustment.When AUTO action is to be entered, select AUTO in (2)and press the "ENT" key to complete the setting.Ｇ５６The setting value is displayed duringMANUAL operation.AT is displayed during AUTO operation.(The same applies to STC, FTC and TUNE.)ＭＡＲＫ．７５．２５ＨＵ LＮＡＶＥＣＨＯＳＥＴＵＰＥＣＨＯ▼▼▼▼ ０．２３NMＧＡＩＮＳＴＣＦＴＣＴＵＮＥＳＴ▼▼▼▼▼ ＭＡＮＡＵＴAT

55Up/Down −＞ ENT −＞ Up/Down(Select GAIN) └＞(Select MANU) −＞ Control knob −＞ ENT --- Set to MANU mode｜(GAIN adjustment)└＞(Select AUTO) −＞ ENT ---------------------Set to AUTO mode5.5.3.2 Removing sea clutter (STC)Refer to the section, “Sensibility adjustment (GAIN)”.Up/Down −＞ ENT −＞ Up/Down(Select STC) └＞(Select MANU) −＞ ENT −＞ Control knob −＞ ENT Set to MANU mode｜(STC adjustment)└＞(Select AUTO) −＞ ENT ----------------------------Set to AUTO mode└＞(Select HARBOR)−＞ ENT --------------------------------------------Set to HARBOR modeNote: When you select MANU mode, GAIN and FTC will be switched to MANU mode, too.Note: When you select HARBOR mode, FTC will be switched to MANU mode.5.5.3.3 Removing rain and snow clutter (FTC)Refer to the section, “Sensibility adjustment (GAIN)”.Up/Down −＞ ENT −＞ Up/Down(Select FTC) └＞(Select MANU) −＞ ENT −＞ Control knob −＞ ENT Set to MANU mode｜(FTC adjustment)└＞(Select AUTO) −＞ ENT ----------------------------Set to AUTO mode5.5.3.4 Adjusting receiver tuning (TUNE)Refer to the section, “Sensibility adjustment (GAIN)”.Up/Down −＞ ENT −＞ Up/Down(Select TUNE) └＞(Select MANU) −＞ ENT −＞ Control knob −＞ ENT Set to MANU mode｜(TUNE adjustment)└＞(Select AUTO) −＞ ENT ----------------------------Set to AUTO mode35Indicated setting value on manual mode,AT on auto mode

565.5.3.5 Echo expansion (ST)Expanding the echo to the direction of the distance. Two types of echo expansion exist, select ST1 or ST2 from the menu.(1) Use the up-down cursor keys to select ST from among the pull-down display items, and pressthe "ENT" key.(2) Select ST1 or ST2 from the display beside the ST item using the up-down cursor keys, andpress the "ENT" key.Up/Down −＞ＥＮＴ −＞ Up/Down −＞（select ST1）････････････････････ −＞ＥＮＴset ST1└＞（select ST2）･････････････････････−＞ＥＮＴset ST2└＞（select OFF）･････････････････････−＞ＥＮＴST OFF( expansion rate ST1<ST2 )5.5.3.6 Displaying locus of target (TRACK)(1) Use the up-down cursor keys to select TRACK from among the pull-down display items, andpress the "ENT" key.(2) Select 15SEC, 30SEC, 1MIN, 3MIN, 6MIN, or CONT from the display beside the TRACK itemusing the up-down cursor keys, and press the "ENT" key."TRK 15S" is displayed on the left side of the screen and track mode is entered. 15S indicatesthe length of the track, and displays a maximum of 15-second-long sailing track. Note: When PPI+PPI or ALL PPI+PPI screen mode is used, TRACK function can be used only on CONT mode.．７５．２５ＨＵ+ＳＴ１．７５．２５ＨＵ+The picture to display echoes expanded in the direction of the distanceST1, or ST2 display,no display on OFF stateST function is OFFdisappear after selecting timereal echolocus of targetmoving directionthe length of the track．７５．２５ＨＵ+TK 15SEC

57up/down −＞ＥＮＴ −＞ up/down −＞（select OFF）･････････････ −＞ＥＮＴTRACK OFF└＞（select 15SEC）･･････････････････････････････････−＞ＥＮＴset 15sec. track└＞（select 30SEC）･･････････････････････････････････−＞ＥＮＴset 30sec. track└＞（select 1MIN）−＞ＥＮＴ････････････････････ set 1 min. track└＞（select 3MIN）−＞ＥＮＴ････････････････････ set 3 min. track└＞（select 6MIN）−＞ＥＮＴ････････････････････ set 6 min. track└＞（select CONT）･･･････････････････････････････････−＞ＥＮＴset continue track5.5.3.7 Enlarging selected areas (ZOOM)The video image centering around the cross cursor is doubled as it is displayed on the screen.(1) Use the up-down cursor keys to select ZOOM from among the pull-down display items, and pressthe "ENT" key.(2) Select ON the using up-down cursor keys from the ON/OFF display beside the ZOOM item, andpress the "ENT" key.(3) A small cross cursor for setting and "SET ZOOM POINT" are displayed at the screen center andat the bottom respectively, and the magnification point is to be set. Use cursor keys to move thecross cursor to the point to be magnified, press the "ENT" key and the setting is completed. Thearea around the cross cursor is displayed in 2x magnification, with blinking "ZOOM" displayed atthe screen upper right, indicating that a ZOOM display is being conducted. To cancel the ZOOM function, either select OFF in (1) or begin operation of range.Up/Down −＞ ENT −＞ Up/Down (Select ON) −＞ ENT −＞ Up/Down &Left/Right −＞ ENT ZOOM Setting(Select ZOOM) ｜(Move cross cursor)└＞ (Select OFF) −＞ ENT ----------------------------- ZOOM canceledNote 1) VRM2 and EBL2 do not follow the ZOOM function during a floating state.Note 2) Normal screen returns when you change the range scale.Note 3) ZOOM function is usable only in PPI screen.Note 4) ZOOM function is unusable in OFF-C.Note 5) Center of ZOOM can be set any desired position within the set range.blinking "ZOOM"

585.5.3.8 Increasing sensitivity (S/L)The pulse width is automatically changed as you change the range. However, if you want toincrease sensitivity, you can choose sensitivity from two pulse widths. The short pulse (SHORT) givesyou sharp images with high distance resolution. The long pulse (LONG) provides high sensitivity andshows targets in large size for easy identification although distance resolution is reduced.(1) Use the up-down cursor keys to select S/L from among the pull-down display items, and pressthe "ENT" key.(2) Select Pulse length(SHORT or LONG) using the up-down cursor keys from the SHORT/LONG display besidethe S/L item(3) The setting will be completed when the “ENT” key ispressed after the selection.Up/Down −＞ ENT −＞(Select SHORT) −＞ ENT ----------------------Set to short pulse└＞(Select LONG) −＞ ENT ------------------------Set to long pulseSET ZOOM POINT．７５．２５ＨＵＳ+indicated S or L

595.5.4 SETUP MenuTo be used for various settings and switching of the screen・Common operations for the SETUP menu (Up to the point when "SETUP" menu is selectedfrom the main menu)Press the "MENU" key and select "SETUP" from the displayed 4 main menus using the left-right cursor. (The contents of the selected MENU will appear on a pull-down display in accordancewith the movement of the left-right cursor.)MENU ――＞ Left/Right (Select SETUP)When the above-mentioned operations have been conducted, the items of the SETUP menu arevertically displayed. Further explanation about the SETUP menu will be conducted on theassumption that this "common operation for the SETUP menu" has already been completed.5.5.4.1 Initiating the screen display (WINDOW)A function to switch the display method of the screen. A selection can be made from amongthe 7 patterns of screen arrangements, from the ordinary PPI display to the 2-screen PPI display,etc.a) PPI screenb) PPI screen & SEMI3D screenc) PPI screen & PPI screen (Range can be operate in each screen.)d) PPI screen & Navigation screene) All PPI screen (PPI, all the screen display.)f) All PPI screen & All PPI screen(PPI & PPI, all the screen display.)g) MOB screen(1) Use the up-down cursor keys to select WINDOW from among the pull-down display items, andpress the "ENT" key.(2) Select a screen to be displayed with the up-down cursor keys from among the above 7 itemsthat are displayed beside the WINDOW item.(3) The setting will be completed when the "ENT" key is pressed after the selection.ＭＡＲＫＷＩＮＤＯＷＳＥＬＷＩＮＰＩＣＴＵＲＥSYSTEM CHECKＣＵＳＴＯＭ．７５．２５ＨＵＮＡＶＥＣＨＯＳＥＴＵＰSEMI3D/PPIＰＰＩ／ＰＰＩＰＰＩ／ＮＡＶＡＬＬＰＰＩＡＬＬＰＰＩ／ＰＰＩＰＰＩＳＥＴＵＰ▼▼▼▼▼▼▼ ０．２３NMＡ▼

60Up/Down ―＞ ENT ―＞ Up/Down ――＞ (Select PPI） −＞ ENT （a）（select WINDOW） └−＞ (Select PPI+SEMI3D）−＞ ENT （b）└−＞ (Select PPI+PPI） −＞ ENT （c）└−＞ (Select PPI+NAV） −＞ ENT （d）└−＞ (Select ALL PPI） −＞ ENT （e）└−＞ (Select ALL PPI+PPI） −＞ ENT （f）└−＞ (Select MOB） −＞ ENT （g）-The limitation of the operation when it was set on each screen. SCREENITEMＰＰＩ PPI/SEMI3DPPI/NAV PPI＋PPI ALL PPI ALL PPI PPI MOBRANGE 〇○◎○◎×VRM1、EBL1 ○○△×××VRM2、EBL2 〇○△×××FL VRM2･EBL2 〇×××××RINGS ON/OFF 〇○○○○×ZOOM、OFF CENT 〇×××××///CSR 〇○△○○×HDG OFF 〇○○×○×STERN M ○○○○○×NORTH M 〇○○○○×GAIN、STC、FTC 〇○◎×××TUNE ○○○×××ST 〇○○×××GZ ○○◎×××SEL WIN ××○×○×CONTRAST ○ ○ ○ ○ ○ ×TXON/OFF ○○○○○×◎ ： Independent control at time as two screen.（Switching the screen is necessary (SEL WIN)）○ ： It becomes simultaneous control at the time as two screen.△ ： It can be used only at the time of PPI screen.× ： It can’t be used.- Screen modes and Operations(a) PPI Screen All functions can be used on this screen.．７５．２５ＨＵ＋PPI Screen

61(b) PPI/SEMI3D ScreenIt becomes simultaneous control at the time astwo screen.Note1: All controls, such as EBLs, VRMs effects bothscreen.The ZOOM, OFF-C, FL EBL2, and FL VRM2 couldnot be used on this mode. The "SEMI3D" screendisplays the center as ship's heading always.(c) PPI/PPI ScreenThe radar picture is refreshed two antennascanning for each PPI screen. Un-refreshed screen picture is holded during the time.Note: The radar picture is refreshed with two scanning interval for each screen. Rightscreen picture is holded during refreshing left screen, left screen holded duringrefreshing right screen. When your ship navigates in high speed, use PPI screen to getfast refreshing picture.Note: Functions ZOOM, OFF-C, FL-EBL2, and FL-VRM2 can not be used on this screen.Note: The function RANGE, GAIN, STC, FTC, and GZ can be used for each screenindependantly. The screen selected in "SEL WIN" that the range indicator displayed inreverse can be controlled.Note: The cross cursor displayed only on selected screen.-Operationa) Changing RANGE of LEFT screen１） When the RIGHT range indicator displayed in reverse, change to LEFT screen with"SEL WIN" function.２） Press ”RANGE UP” or ”RANGE DOWN” key to change the LEFT screen RANGE.b) Adjusting GAIN of LEFT screen.１） When the RIGHT range indicator displayed in reverse, change to LEFT screen with"SEL WIN" function.２） Press the "GAIN" key, "G50" will displayed in reverse and ready for adjusting GAIN.３） Adjust GAIN with the control knob.Adjust STC and FTC in a same manner as GAIN.．７５．２５ＨＵＳ＋280 320 000 040 080PPI/SEMI3D ScreenLEFT screen /―――/・・・・・・/―――/・・・・・・/―――/・・・・・・ｔ→RIGHT screen ・・・・・・ /―――/・・・・・・/―――/・・・・・・/―――/ picture drawing(refreshed)displayed previous picture ( hold)．７５．２５ＨＵＳ２４６＋Ｇ 55/35Ｓ 35/ATＦ 35/ATLEFT screen selected．７５．２５ＨＵＳ２４６＋Ｇ 55/35Ｓ 35/ATＦ 35/ATGAIN adjustment for LEFT screenLeft GAIN indicates in reverse

62Note: During adjustment of GAIN, STC, or FTC, radar picture refreshing is fixed to theadjusting screen. Approximately 5 seconds errapsed after adjustment, radar picturerefreshing is return to normal.c) Determining the distance with VRM1 on LEFT screen.１) When the RIGHT range indicator displayed inreverse, change to LEFT screen with "SEL WIN"function.２） Press the "VRM1" key, " " will displayedin reverse and ready for adjusting VRM1.３） Determining the distance with the control knob.Note: If operate the VRM1 on the RIGHT screen, VRM1will move to the RIGHT screen.Operate VRM2, EBL1, or EBL2 in a same manner as VRM1.(d) PPI/NAV ScreenNote: The ZOOM, OFF-C, FL EBL2, and FLVRM2 can not be used on this screen.(e) ALL PPI ScreenNote1: The RANGE, RINGS interval, and Display modeare displayed on the upper-left of the screen.Note2: When press the key except "MENU", "RANGEUP/DOWN", "BRILL", and "POWER", return toPPI screen.(f) ALL PPI/PPI ScreenNote1: The RANGE, RINGS interval, and Display modeare displayed on the top of the screen.Note2: When press the key except "MENU", "RANGEUP/DOWN", "BRILL", and "POWER", return toPPI/PPI screen.Note3: The radar picture is refreshed with twoscanning interval for each screen. Right screen pictureis holded during refreshing left screen, left screenholded during refreshing right screen. When your shipnavigates in high speed, use PPI screen to get fastrefreshing picture.Ｇ 55/35Ｓ 35/ATＦ 35/AT1 0.00NMDetermining the distance with VRM1 on LEFT screen．７５．２５ＨＵＳ２４６＋．７５．２５ＨＵＳ＋NAV ＤＩＳＰＬＡＹWAY P １２３．４° ６．８ＮＭCOURSE ２．３８ＮＭXTE ＜＜＜HDG ２６７．３°ＴSPD １２．８ＫＴTEMP ２０．８° ＣDEPTH ５８．３ MLAT/LON ３４°０８．２２Ｎ１３８°０２．５３ＥPPI/NAV screen＋．７５．２５ＨＵ SALL PPI screen．７５．２５ＨＵＳ．２５．１２５＋ALL PPI PPI screen1 0.00NM

63(g) MOB ScreenThe MOB key has been pressed, the MOB position andship's position are displayed. If not, MOB position will bedisplayed with bars( --.- )Press MOB key to clear the MOB position and returnto previous screen. Press ENT key to return previousscreen with keeping the MOB position data.5.5.4.2 Switching screens on PPI/PPI screen ( SEL WIN )Switching to the desired screen for activation on a PPI/PPI screen display.The "SEL WIN" function is switches the activated screen to effect the operation such as,RANGE, GAIN, STC, FTC, VRM1/2, EBL1/2, and guard zone. The range indicator of activatedscreen is displayed in reverse.When "SEL WIN" is selected with the up-down cursor keys from among the pull- down displayitems and the "ENT" key is pressed, activated screen will be changed to the opposite screen.Up/Down ―＞ＥＮＴ･･････････････････････････････the opposite screen activated（select SEL WIN）5.5.4.3 Reversing the screen (PICTURE)Reversing to the screen for easy viewing on weather, temperature, and day / nightenvironment conditions.When "PICTURE" is selected with the up-down cursor keys from among the pull- down displayitems, select "DAY" and the "ENT" key is pressed, a normal display will appear. A reverse displaywill appear if "NIGHT" selectedUp/Down ―＞ＥＮＴ ―＞ Up/Down ――＞ (select DAY） −＞ＥＮＴ −＞ normal display（select PICTURE） └−＞ (select NIGHT） ---------------−＞ＥＮＴ−＞ reverse displayMAN OVERBOARDMOB POS 35°08．42N139°03．33ESHIP’S POS 37°12．42N142°04．33EPRESS MOB KEY TO DATA CLEARPRESS ENTER KEY TO RETURNRange display on the active screen become a reverse.75 .25 S．５．２５ .75 .25 HU S．５．２５

645.5.4.4 Fault Diagnosis by Self Check （SYSTEM CHECK)Verifying the problem point by SYSTEM CHECK when, for example, some abnormality hasoccurred.(1) Select SYSTEM CHECK from the pull-down display items using up-down cursor key, andpress the “ENT” key.(2) The system check screen will appear.While watching the screen , check the following:i) Whether all items are marked “OK”. (If any item is marked “NG”, the indicated locationmay be faulty.)ii) Press a front-panel key and see if the corresponding display on the screen is highlighted.iii) Turn the control knob and see if the lower-right indicator move to right or left.(3) Press the POWER key to return to the previous screenａ）ＲＯＭ------------------------- Indicates the ROM status.ＲＮＧＵＲＮＧＤＢＲＩＬＬＡＵＴＯＧＡＩＮＳＴＣＦＴＣ１２３４５６７ＭＯＢPOWERn) Indicates the operation status of front-panel keys.SYSTEM CHECK screenＥＮＴＭＥＮＵ Indicates the control knob status. Indicates the cursor status.ＣＯＮＴＲＯＬＫＮＯＢSYSTEM CHECKMEMORY CHECKa) ROM-------------------------- ＞ ROM OKb) RAM-------------------------- ＞ RAM OKc) Backup memory --------------- ＞ BACKUP OKSIGNAL CHECKd) Transmit trigger --------------- ＞ (1) TRIGGER OKe) Bearing pulse------------------ ＞ (2) AZIMUTH OKf) Heading pulse------------------ ＞ (3) HM OKg) +5Vvoltage（at video circuit）--- ＞ (4) +5V OK 5.2Vh) High voltage（at scanner）------ ＞ (5) H.T. AT SU OK 253.2Vi) High voltage（at display）-------- ＞ (6) H.T. AT DU OK 253.2Vj) Magnetron current ------------- ＞ (7) MAG. CUR. OK 2.1k) Tuning voltage----------------- ＞ (8) TUNE OKl) Cumulative usage time ------- ＞ HOURMETER Operation time ------------- ＞ OPERATE 12.0H Transmit time --------------- ＞ TRANSMIT 10.3Hm) ROM version--------------- ＞ ROM VERSION V1.00PRESS POWER KEY TO RETURNＤＡＹ display ＮＩＧＨＴ display．７５．２５ＨＵ．７５．２５ＨＵ

65ｂ）ＲＡＭ----------------------Indicates the RAM status.ｃ） Backup memory---------Indicates the backup memory status.ｄ） Transmit trigger--------Indicates the signal line status for the trigger signal sent from the scanner unit.e） Bearing pulse-------------Indicates the signal line status for the bearing signal sent fron the scanner unit.f） Heading pulse ------------Indicates the signal line status for the bow signal sent from the scanner unit.g） +5V voltage ---------------Indicates the reference voltage status of the video circuit and its voltage value. (at video circuit)(normally about 5 V)h） High voltage(at SU) ----Indicates the status of th high voltage supplied from the display unit to thescanner unit and its voltag value (normally about 250 V) at scanner unit.i） High voltage(at DU)-----Indicates the status of th high voltage supplied from the display unit to thescanner unit and its voltag value (normally about 250 V) at display unit.j） Magnetron current------- Indicates the status of the anode current flowing in the magnetron and itscurrent value.k） Tuning voltage------------ Indicates the status of the voltage used for tunning and its voltage value.l） Cumulative usage time-Indicates the cumulative time your radar is used.OPERATE: Duration of time during which the power supply is turned on.TRANSMIT: Duration of time transmitting.m） ROM version-------------- Indicates the ROM software version.n） Front-panel keys--------- As you press any front-panel key when the SYSTEM CHECK screen is on, thecorresponding key is highlighted on the screen by displaying it in reverse video.

665.5.4.5 Changing the content of the setting (CUSTOM)Note) Items in CUSTOM are for conducting settings and adjustments at the time of installation, whichneed not be conducted normally.-Common operations for CUSTOMUse the up-down cursor keys to select CUSTOM after ”the common operations for the SETUP” menu,and press either the "ENT" key.MENU −＞ Left/Right −＞ Up/Down −＞ ENT(Select SETUP) (Select CUSTOM)Common operation for SETUPWhen the above operations have been conducted, 4 items, namely "KEY ASSIGN", "PRESET1","PRESET2" and "ADJUST", are displayed beside the CUSTOM item.Further explanation concerning the CUSTOM menu items will be done on the assumption that theabove "common operations for CUSTOM" have already been conducted. ＣＵＳＴＯＭＭＡＲＫＷＩＮＤＯＷＳＥＬＷＩＮＰＩＣＴＵＲＥＳＹＳＴＥＭＣＨＥＣＫ．７５．２５ＨＵＳＬＮＡＶＥＣＨＯＳＥＴＵＰＳＥＴＵＰ▼▼▼▼▼▼ ０．２３NM▼ＡＫＥＹＡＳＳＩＧＮＰＲＥＳＥＴ１ＰＲＥＳＥＴ２ＡＤＪＵＳＴ▼

675.5.4.5.1 Changing the settings of soft keys (KEY ASSIGN)Conducting alterations and new settings for the functions of keys with number displays of 1-7.(1) Screen display for the settingWhen KEY ASSIGN has been selected with the up-down cursor keys from among the CUSTOM itemsand the "ENT" key is pressed, the setting screen is displayed. (See chart below)(2) Selecting functionsReverse the items to be set using the up-down cursor keys. (The items become reverse in accordancewith the moving cursor.)(3) Key settings(3)-1 Making new settings (Example 1)For allocating the selected item to a soft key, press the key to be allocated. The selected itemwill be displayed beside the key, which indicates that the setting has been conducted.(3)-2 Changing the function of a key with an preset function (Example 2)When the allocated key is pressed, its function will be altered to the one selected in (1) above andthe previous function will be canceled.The current settings for SET1-4 will be displayed below NEXT. In order to switch the settingsSET1-4, use the right-left cursor keys. (Double settings (setting 1 item for more than 1 key) arepossible.) 1 5 6 7 4 3 2ＫＥＹＡＳＳＩＧＮＭＥＮＴEBL1 EBL2 RINGS PPIVRM1 VRM2 TUNE PPI/3DVAR RNG FL EBL2 ST PPI/PPITRACK FL VRM2 ZOOM PPI/NAVTARGET GZ SLEEP ALL PPISEL WIN OFF-C PICTURE ALL PPI2NEXT NEXTNEXT NEXTSET1 SET2 SET3 SET4ＭＡＲＫ □ EBL1□ VRM1□ EBL2□ VRM2□ FL EBL2□ FL VRM2□ HDG OFF □ ///CSR□ RINGS□ VAR RNG□ TARGET□ +MK LINEＮＡＶ □ MODE□ GZ□ OFF-C□ SLEEPＥＣＨＯ □ TUNE□ ST□ TRACK□ ZOOM□ S／LＳＥＴＵＰ □ SEL WIN□ PICTURE□ PPI□ PPI/3D□ PPI/PPI□ PPI/NAV□ ALL PPI□ ALL PPI2□ NEXTKey GroupsMove with up-down cursor Move with right-left cursorMark is displayed if the function set to some key. Operation panel Keys 1 - 7Soft Key Setting Screen

68When settings are to be conducted for more than 1 key, repeat the operations (3)-1 to (3)-2. (Example 3)(4) Completing the settingAfter the setting has been finished, press the ENT key to exit from KEY ASSIGNMENT.Example of an operation(The process up to the selection of KEY ASSIGNMENT from the SETUP menu is omitted. Only theprocess after the above chart will be described.)Example 1) Altering OFF-C allocated to key 6 in setting 2 to HDG OFF.Up/Down → ６ →ENT -------------------Key 6 altered from Select HDG OFF The display beside key 6 Exit from OFF-C to HDG OFFchanges to HDG OFF KEY ASSIGNMENTExample 2) Re-allocate SEL WIN to key 1 in setting 2.Left/Right → Up/Down → １ →---------------- ENT Key 1 insetting 2select SEL WIN SEL WIN is displayed Exit from is altered to SEL WINFrom SET1 beside key 1. KEY ASSIGNMENT to SET2Example 3) Alter key 1 in setting 1 from ST to HDG OFF and then reset key 1 in setting 2 as SEL WIN.Up/Down → ６ --------- Key 6 altered fromSelect HDG OFF The display beside key 6 ST to HDG OFFchanges to HDG OFFLeft/Right →Up/Down → １ →ENT -------------KeySelect SEL WIN SEL WIN is displayed Exit from is altered to SEL WINFrom SET1 beside key 1. KEY ASSIGNMENT to SET2

695.5.4.5.2 Changing the content of settings 1(PRESET1)(1) When PRESET1 is selected from CUSTOM items and the "ENT" key is pressed, thePRESET1 screen (See chart below) appears.(2) Select items with up-down keys and contents with left-right keys.The selected items will be enclosed by square frames and the contents will appear in reverseddisplay. (a)Repeat this operation when multiple settings are to be made.(3) After the setting is completed, exit from the PRESET1 screen with the "ENT" key.Note) The contents will be displayed in (b) together with the numbers selected in P TABLE.ａ） Heading Flash Each revolution of the antenna turns the heading marker on and off.b) Stern Mark Display/non-display of the stern linec) North Mark Display/non-display of the north markｄ） ST'BY screen Setting the screen display in stand-byNAVI: Navigation Data screenNOR: Normal screene) Buzzer Volume Setting the volume of the buzzerｆ） VRM Unit Setting VRM unit NM: Nautical mile KM: Kilometer SM: Statute mileg) Water temperature Setting water temperature unit°C: CelsiusF: Fahrenheith) Depth Unit Setting Depth unitM: Metera) Heading Flashb) Stern Markc) North Markd) ST'BY screene) Buzzer Volumef) VRM Unitg) Water temperatureh) Depth Uniti) EBL Modej) WayPoint Modek) Heading Inputl) Heading Typem) Cursor positionn) TX PulseＰＲＥＳＥＴ１ＨＭＦＬＳＨＯＮＯＦＦＳＴＥＲＮＭＯＮＯＦＦＮＯＲＴＨＭＯＮＯＦＦＳＴ‘ＢＹＮＡＶＩＮＯＲＢＵＺＶＯＬＯＦＦＬＯＷＨＩＧＨＲＭＵＮＩＴＮＭＫＭＳＭTEMP °ＣＦＤＥＰＴＨＭＦＴＦＭＥＢＬＢＲＧＲＥＬＴＲＵＥＭＡＧＷＰＢＲＧＴＲＵＥＭＡＧＨＥＡＤＩＮＰＵＴＮＭＥＡＳＩＮ／ＣＯＳ１2ＢＩＴ１０ＢＩＴＨＥＡＤＴＲＵＥ MAG＋ＭＫＭＯＤＥＤＩＳＴ／ＢＲＧＬＡＴ／ＬＯＮＰＴＡＢＬＥ 0 1 ２．５．７５１．５３６ＰＴＡＢＬＥ１ＳＨＯＲＴ 000１１ＬＯＮＧ 0１１２２（ａ）（ｂ）Heading MarkerStern Marker．７５．２５ＨＵ

70FT: FeetFM: Fathomi) EBL Mode Setting Mode of EBLREL: Relative bearing from HMTRUE: True bearingMAG: Magnetic bearingj) WayPoint Mode Setting WayPoint bearing modeTRUE: True bearingMAG: Magnetic bearingk) Heading Source Setting Heading source;NMEASIN/COS: Compass Data with SIN/COS signal12BIT: Compass Data with 12bits serial signal10BIT: Compass Data with 10bits serial signall) Heading Type Heading Information Type settingMAG: Magnetic bearingTRUE: True bearingm) Cross cursor position display ModeDIST/BRG: Range and Bearing indicationLAT/LON: Latitude and Longitude indicationn) Transmitting pulse width Pulse setting for Rang (Note: )Note: P TABLE PUSLE TYPE 0.5NM 0.75NM 1.5NM 3NM 6NMP TABLE 0 SHORT 00001 LONG 00112P TABLE 1 SHORT 00011 LONG 01122P TABLE 2 SHORT 00111 LONG 11222Note1： Pulse width 0 : 0.12uS, 1 : 0.3uS, 2 : 0.8uSNote2： The pulse width for 0.125 to 0.25NM Ranges are always 0.12us.Note3： The pulse width for 12NM and 24NM Ranges are always 0.8us.

715.5.4.5.3 Changing the content of settings 2 (PRESET2) Refer to the section, “Changing the content of setting 1(PRESET1)”.a) Guard Zone Level Guard Zone Detection Level setting1: High Sensitivity, .. 7: Big Target Onlyb) Guard Zone Mode Guard Zone Detection Mode settingIN: Detect Target inOUT: Detect Target dissapearc) Hold Hold the radar picture for 30 seconds after switch to ST'BYThe EBL and VRM can be used in HOLD state.(Note1: )d) Display Unit Mode Display Unit Operation Mode settingRDR: Radar mode(normal)MONI: Monitor mode(for slave display use)NAV: Navigation mode(for DATA indicator use)e) External Buzzer External Buzzer control settingOFF: Buzzer offCONT: Continuous toneINT: Intermittent tonef) Bearing pulse/rot.(IN) Change the setting when connected to the other type of radarg) Bearing pulse/rot.(OUT) Change the setting when connected to the other type of radarh) Built-in simulator switch for Demonstrationi) Interference Rejection Reject the interference from the other radarOFF: IR OFFIR1: ON level 1IR2: ON level 2（ａ）a) Guard Zone Levelb) Guard Zone Modec) Holdd) Display Unit Modee) External Buzzerｆ） Bearing pulse/rot(IN)g) Bearing pulse/rot(OUT)h) Built-in Simulatori) Interference Rejectionj) Ship's Speedk) Indication LanguageＰＲＥＳＥＴ２ＧＺＬＶＬ１２３４５６７ＧＺＭＯＤＥＩＮＯＵＴＨＯＬＤＯＮＯＦＦＤＩＳＰＬＡＹ RDR ＭＯＮＩＮＡＶＥＸＴＢＵＺＯＦＦＣＯＮＴＩＮＴＩＮＰ／Ｒ１０８０１０２４２０４８４０９６３６０ＯＵＴＰ／Ｒ１０８０１０２４２０４８４０９６３６０ＤＥＭＯＯＮＯＦＦＩＲＯＦＦＩＲ１ＩＲ２ＳＰＤＳＥＴＮＭＥＡＭＡＮＵ０．０ＫＴＬＡＮＧＵＡＧＥＣＨＩＤＡＮＥＮＧＦＲＥＧＥＲＧＲＥＩＴＡＪＰＮＫＯＲＮＯＲＰＯＲＲＵＳＳＰＡＳＷＥＴＵＲＰＲＥＳＳＥＮＴＥＲＫＥＹＴＯＲＥＴＵＲＮ

72j) Ship's Speed Own ship's speed settingNMEA: Data input from NMEA portNAMU: Set ship's speed with manualSet the Speed with control knob.k) Indication Language Select the language for MENU and SOFT KEY( Note2: )Note1: HOLD function POWER ＝ POWER key to press HOLD is function which you want to hold the currently displayed radar screen conditions whilestandby state. After finished operation such as EBL, VRM about 30 seconds, the screen return tostandby screen.Setting HOLD POWER （Operation） ▽ ▽ （Under Tx） ------------------------------------------- △＜―――――Under HOLDmode―＞△＜―――――ST’BY DISPLAY―――Turn to transmission offEBL,VRM operation:Ｘ seconds Ｘ＋30seconds（Time used）NOTE) EBL and VRM function is usable in HOLD state.Note2: 15 languagesCHI : Chinese KOR : KoreanDAN : Danish NOR : NorwegianENG : English POR : PortugueseFRE : French RUS : RussianGER : German SPA : SpanishGRE : Greek SWE : SwedishITA : Italian TUR : TurkishJPN : JapaneseＳＴ‘ＢHOLD“HOLD” is displayed and blinkTx OFFＸ＋３０SettingHOLDEBLs and VRMs can be usedfor measuring target data.

735.5.4.5.4 Changing the content of settings (ADJUST)The items in the ADJUST menu are ones that need adjustment at the time of installation. Thesettings need not normally be altered.(1) Adjusting distance (TIMING ADJ)This adjustment is necessary to adjust the distance on the radar screen to the actual distance.(1) In preparation for adjusting the distance, the following adjustments are to be conducted.First, set the radar range to 0.25 NM, FTC to minimum, and GAIN to optimum. Then adjust STCuntil the pulse generated by your own radar appearing at the center of the screen is clearlyrecognized as a round dot.(2) Adjusting the distance.(2)-1 Select ADJUST by "common operations for CUSTOM", use up-down cursor keys to selectTIMING ADJ from among the pull-down display items and press the "ENT" key.(2)-2 As the distance adjustment screen is displayed, adjust timing until the center dot looks as(b) with the control knob. If there is a linear target such as a bridge or breakwater, adjusttiming until the target appears straight in the screen.(2)-3 When the adjustment is finished, press the "ENT" key to exit from the distanceadjustment screen.Up/Down →ENT →Control knob →ENTselect TIMIG ADJ Timing adjustment finished(2) Adjusting angle (HEAD ADJ)This adjustment is necessary to adjust the head direction on the screen to the actual direction ofthe ship.(1) In preparation for adjusting the angle, the following adjustments are to be conducted.(1)-1 Find one small target within a 0.5 to 1.5 NM range which, lying in the bow direction, can bedetected with eyes and is clearly visible in the radar screen.(1)-2 Measure the bearing of this target from the bow direction using a compass. Let it be θc.(1)-3 Measure the bearing of the above target in head up (HU) mode using EBL. Let it be θr.(1)-4 Calculate the following:θc - θr： if θc is greater than θr360 - ( θr - θc ) ： if θr is greater than θca) Too far b) Correct c) Too shrunk

74This is the azimuth error of your radar at installation. If θc and θr are equal, theadjustment described below is unnecessary.(2) Adjustment method(2)-1 Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys toselect HEAD ADJ from among the pull-down display items and press the "ENT" key.(2)-2 As the distance adjustment screen is displayed, set the value to the azimuth error youhave calculated above with the control knob.(2)-3 When the adjustment is finished, press the "ENT" key to exit from the distanceadjustment screen.Up/Down −＞ ENT −＞ Control knob −＞ ENTSelect HEAD ADJ. Set a value to .(3) Adjusting tuning circuit (TUNING CAL)Normally you do not need to make this adjustment. This adjustment may necessary to ensurethat the automatic tuning circuit operate at its best operating point. However, if sensitivity is poor orthere is any symptom suggesting improper tuning, you may need to adjust this circuit following theprocedure below.(1) Choose several stable video images in the 3 NM range or more.(2) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys to selectTUNING CAL. from among the pull-down display items and press the "ENT" key.(3) As the tuning circuit adjustment screen(TUNING CALIBRATION) is displayed, select AUTOwith up-down cursor key.(4) While watching video images, adjust until echoes are clearly visible with the control knob.(5) Select MANUAL with the down cursor key.(6) Adjust until echoes are clearly visible with the control knob. This set status is middle value ofmanual tuning.HEAD DIRECTION ADJUSTMENTADJUST WITH CONTROL KNOBPRESS ENTER KEY TO RETURN ３５８．８°HEADING Adjustment３１HU

75(7) When the adjustment is finished, press the "ENT" key to exit from the TUNINGCALIBRATION screen.Operate of (3) to (7) Up/Down −＞ Control knob −＞ Up/Down −＞ Control knob −＞ ENTSelect AUTO Adjust tuning Select MANU Adjust tuning(4) Adjusting antenna height (ANTENNA)Depending on the position at which the antenna is installed, it may be necessary to make thefollowing correction. (Consult Anritsu or an Anritsu distributor for details.)(1) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys to selectANTENNA from among the pull-down display items and press the "ENT" key.(2) As the adjustment screen is displayed, using the control knob to choose your desired value from1 to 9.(3) Press the "ENT" key to exit from the adjusting antenna height screen.Up/Down −＞ ENT −＞ Control knob −＞ ENTSelect ANTENNA Choose value CompleteAdjust with control knobSelect with up-downcursor keyEcho remain.TUNING CALIBRATIONREAD OPERATION MANUALSELECT ITEM WITH ∧∨ KEYTUNE WITH CONTROL KNOBPRESS ENTER KEY TO MEMORYAUTOMANUAL３１HUAdjust with Control knobSTC CURVE ADJUSTMENTADJUST WITH CONTROL KNOBPRESS ENTER KEY TO MEMORYSTC CURVE ５３１HUANTENNA Adjustment

76(5) Setting automatic GAIN circuit (AUTO GAIN)Here, you set the automatic and manual gain level. Normally, adjust this setting to be slight thenoise echo appears on the screen in AUTO mode.(1) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys to selectAUTO GAIN from among the pull-down display items and press the "ENT" key.(2) As the adjustment screen is displayed, using the control knob to choose your desired value from1 to 30.(3) Press the "ENT" key to exit from the adjustment screen.Up/Down −＞ ENT −＞ Control knob −＞ ENTSelect AUTO GAIN Choose value Complete(6) Setting automatic STC circuit (AUTO STC)Here, you set the automatic STC and automatic FTC level. Adjust this setting to be slight seaclutter appears on the screen, when you observe a small target (ex. Small buoy).(1) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys to selectAUTO STC from among the pull-down display items and press the "ENT" key.(2) As the adjustment screen is displayed, using the control knob to choose your desired value from1 to 16.(3) Press the "ENT" key to exit from the adjustment screen.Up/Down −＞ ENT −＞ Control knob −＞ ENTSelect AUTO GAIN Choose value Complete(7) Setting HARBOR STC circuit (HARBOR)Here, you set the HARBOR STC level. Adjust this setting to be slight sea clutter appears on thescreen, when you observe the land in a bay area at short-distance range.(1) Select ADJUST by “common operations for CUSTOM”, use the up-down cursor keys to selectHARBOR from among the pull-down display item and press the “ENT” key.(2) As the adjustment screen is displayed, using the control knob to choose your desired value from1 to 16.(3) Press the “ENT” key to exit from the adjustment screen.Up/Down −＞ ENT −＞ Control knob −＞ ENTSelect HARBOR Choose value Complete

77CHAPTER 6. MAINTENANCE AND INSPECTIONMost of maintenance of this radar should be referred to qualified personnel. If radarhas any problem, contact your dealer and tell us that problem.There are high voltage circuit inside of this radar.Do not attempt to open the rear cover of display unitor disassemble internal parts. When you open theradome, power must be off.Even power switch is OFF, this radar is still sup-plied power inside.The followings table shows the maintenance by user. Please check periodically.Tab. 6-1 Maintenance*: Use grease for plastics for RA775UA. If you use other type of grease(not for plastics), itmay break antennaConcerning ConsumableThe radar uses consumable as listed below that require periodic replacement.(1) MagnetronThis part is mounted in the scanner unit. If distant echo images have be-come less visible, the magnetron probably may have degraded. In such a case,replace it. Consult your distributor for replacement of this part.Period of the replacement : 3000hour(typ.) (500hour guarantee)(2) LCD back-lightThis part is mounted in the display unit. If the display screen is ex-tremely dark and its illumination cannot be corrected by adjusting brightness,the LCD back-light may be faulty or may have burnt out. In such a case, replaceit. Consult your distributor for replacement of this part.Period of the replacement : 15000hour(typ.) (1000hour at 0℃)Inspection Interval Inspection Item Method of Inspection and Maintenance3-6 months Rust and loosenessin scanner unit Check whether the scanner’s fitting bolts arecorroded or less.Display screen ofLCD display Clean filter and LCD screen surfaces with a softand wet cloth.6-12 months Grease* applicationto antenna drivegearApply an even coating of grease* to the entiresurface of the antenna drive gear with a spatulaor brush.Check for contact ofconnectors Check whether connectors are contacted prop-erly. If any connector is improperly contacted orstained, correct it by using a contact restoringchemical agent or by polishing or replace with anew one if necessary.!WARNING

78(3) FuseThe fuse is built inthe power supply cable. Ifthe fuse appears to beblown, check the fuse. Ifblown, replace it followingthe procedure shown inFig.6-2.PushPower supply cableWire(White)Turn counterclockwiseand pullFuseSpringPush and turn clockwiseReplace new fuseTo display unitFig. 6-2 Method for replacing fuse

79CHAPTER 7. TROUBLESHOOTINGThis chapter explains how to identify trouble locations when the radar is found faultyand how to request repair.It happens any disorder, keep pressing POWER key for 3 sec. to power off. Then waitover 10 sec., when you power on again.If you find the radar is faulty, check it the following procedure described below. If youfind as a result of inspection that the fault cannot be repaired on board, contact your dis-tributor or Anritsu for repair.For faster service, please let us know about followings when you request repair:(1) Ship's name, place of anchorage, allowable repair period or time(2) Radar type (This radar is RA775UA.)(3) Manufacturing number (indicated on the back of the display unit)(4) Fault symptoms and inspection resultsThere are high voltage circuit inside of this radar.Do not attempt to open the rear cover of display unitor disassemble internal parts. When you open theradome for installation, power must be off.Even power switch is OFF, this radar is still sup-plied power inside.This chapter explains how to identify trouble locations when the radar is found faultyand how to request repair.●7.1 Fault Diagnosis by Self-check The radar incorporates a failure diagnostic function (called "self-check") to diagnosefaults by the equipment itself. Please refer to "5.5.4.4 Fault Diagnosis by Self Check (SYSTEM CHECK)" and checkwhether there is any fault in your radar.!WARNING

80●7.2 Inspecting Each Part When you have finished self-check, inspect each part of the radar according to Tab.7-1.Tab. 7-1 TroubleshootingSymptom Cause Corrective action(1) Radar cannot be powered on. Power cable is disconnected. Connect power cable correctly.Power supply voltage is offspecified value Use Specified power supply. (SeeSection 3.2)Fuse in power cable is blown. Replace fuse. (See Chapter 6)(2) Nothing is displayed althoughradar is powered on. Brightness or contrast are im-properly adjustment. Use BRIL key to adjust. (SeeSection 5.3.)LCD is faulty. Contact your dealer.(3) Screen is dark. Brightness is improperly ad-justed. Use BRIL key to adjust. (SeeSection 5.3.Backlight is faulty. Contact your dealer.(4) Video does not appear al-though characters are displayed. Interconnecting cable is out ofplace. Connect interconnecting cablecorrectly.(5) Echo image on screen differsfrom actual image. Ship’s heading is incorrectly set. Set ship’s heading correctly. (SeeSection 5.5.4.5.4)Timing adjustment is incorrectlyset. Set timing adjustment correctly.(See Section 5.5.4.5.4)(6) Echo images are blurred. GAIN, STC, or FTC is improp-erly set. Adjust. (See Section 5.3.6 to5.3.8.)Magnetron has degraded. Contact your dealer.(7) Too much noise. Radar is not tuned correctly Adjust TUNE. (See Section5.5.3.4)Radar is not grounded to earth. Connect grounding wire. (SeeSection 3.4 to 3.6.)(8) Not responded when key ispressed. Panel keys are not contacting. Contact your dealer.Power supply circuit is faulty. Contact your dealer.

81CHAPTER 8. PRODUCT SPECIFICATIONS●8.1 General Type: RA775UAPower supply voltage and power consumptionPower supply voltage: 24Vdc (nominal)(10.2 to 41.6 Vdc)Power consumption: 55 W or lessDistance range: 0.125 to 24 NM, 9 ranges(Continual variable range also possible)Distance resolution: Within 30 mDistance accuracy: Better than 0.9% of maximumrange of the scale in use, or 8m,whichever is the greaterMinimum detecting distance: Within 30 mBearing resolution: Within 7.5°Bearing accuracy: 1° or lessWarm-up time: 2 minutesEnvironment conditionsAmbient temperature range (S/U): -25 to 55 °C (D/U): 0 to 55 °CHumidity: 93% RH at +40 °CVibration: (S/U): 3mm(300∼500rpm), 1.2mm(500∼1500rpm), 0.3mm(1500∼3000rpm)14.7m/s2(1.5G) Resonance test(D/U): 3mm(300∼500rpm)0. 75mm(500∼1500rpm)0.2mm(1500∼3000rpm)Wind resistance: 100 knots (max.)Waterproof standard: (D/U): IPX-5(S/U): CFR-46Interconnecting cable: 30 m (max.)Noise: 65 dB or less

82●8.2 Scanner Unit Type: RB714AAntenna type: ParabolicAntenna characteristics Beam width (horizontal): 6.0° ± 1.0° Beam width (vertical): 25° (typ.)Pulse width and peak power output: Pulse width(us) Peak Power(kW)0.12 ± 0.02 1.5(±50%)0.3 ± 0.05 2.0(±50%)0.8 ± 0.1 2.0(±50%)Radio wave type and frequency: P0N, 9445 ± 30 MHzAntenna revolution: 24 rpm ± 20%Transmit/receive switching: Magic T and limiter typeIntermediate frequency: 60 MHz (logarithmic amplifier)Noise figure: 6.5 dB or less●8.3 Display Unit Type: RF718AIndication system: PPI, PPI+semi-3D,Split radar rangeIndicator: 10-inch monochrome LCD640 x 480 dotsMonochrome 4 gray levelsCursor Control: Analog cursor key and rotary encoderVRM: 2 lines (One line can be offset.)Unit of distance can beselected from NM, KM, andSM.EBL: 2 lines (One line can be offset.)Display modes: HU, HS, NU, CU, and TMOff-center: Can be 100% off-centered overthe full range.

83Guard zone: Can be set at any desireddistance and angle in anydesired width. IN and OUTmodes are available.Stretch: 2 modesEcho track: 15, 30 sec, 1, 3, 6 min. andContinuous.Other functions: Interference rejection, Zoom,Sleep mode,Hold mode, Course errordisplay, Parallel cursors, Stern marker,and Navigation data display modePanel brightness: 4 levelsLanguage support: Chinese, Danish, English,French, German, Greek,Italian, Japanese, Korean,Norwegian, Portuguese,Russian, Spanish, Swedish,and Turkish●8.4 External Interface NMEA0183: 2 channels(One standard channel;Optional cable is required for2nd-channel connections)L / L GGA, GLL, RMA, RMCHeading HDT, HDG, HDM, HSC,VHW, VTGSpeed VHW, VTG, RMA, RMCWay point RMB, BEC, BWC,BWR, BER, BPIDepth DBT, DPTCourse error RMB, XTESeawater temperature MTWOthers (using optional cable):External buzzer control output, Auxiliary indicator connecting signaloutput and input, Bow direction signal input(SIN/COS signals), andcompass interface (10/12 bits serial)●8.5 Standard set Display unit 1Scanner unit 1Display cover 1

84Fuse 1 setInterconnecting cable 1 (10m)Power supply cable 1 (2m)M10 hexagonal bolt 4 sets●8.6 Options Interconnecting cable (15, 20, and 30 m)Flush-mount installation kitJunction box for external connection (with cable 1.5m)Option connector kit 249J153058●8.7 External dimensions and weight See APPENDIX ●8.8 External Interface X1 Connector for Option pin No. Name function 1NMEA2-A NMEA ch2 data input(A)19 NMEA2-B NMEA ch2 data input(B)2GND20 EXBUZ+ Output for External Buzzer3EXBUZ- Output for External Buzzercontrolled ship's power output21 VIDEO_IN Video input for Monitor operation0 to -1V negative video, Zi = 50ohm4VIDEO_OUT Video output for External Monitor0 to -1V negative video, Zo = 50ohm22 GND5TRIG_IN Trigger signal input for Monitor operation0 to 5V positive pulse, rising edge23 TRIG_OUT Trigger output for External Monitor0 to 5V positive pulse, rising edge6SHF_IN Heading signal input for Monitor operation0 to 5V negative pulse, falling edge24 SHF_OUT Heading signal output for External Monitor0 to 5V negative pulse, falling edge7AZI_IN Bearing Pulse input for Monitor operation0 to 5V positive pulse, rising edge25 AZI_OUT Bearing Pulse output for External Monitor0 to 5V positive pulse, rising edge8GND26 GYRCK+ Gyro Interface clock(+) input9GYRCK- Gyro Interface clock(-) inputapply 5V pulse between (+) and (-), isolated27 GYRDT+ Gyro Interface data(+) input10 GYRDT- Gyro Interface data(-) inputapply 5V pulse between (+) and (-), isolated28 GND

85X1 Connector for Option(continued) pin No. Name function 11 MARK_I External Marker signal input, ex) Radar Buoynegative video, 0 to -1V Zi = 50ohm29 +12V External interface power, 100mA max.12 SIN Compass Interface for SIN/COS type30 COS Compass Interface for SIN/COS type13 REF Compass Interface for SIN/COS typeSIN/COS signal: SIN = REF+/-1V, COS = REF+/-1V31 -- not used14 GND32 NMEA_OUT NMEA data output, ex) MOB data, TARGET data

24W160941ANRITSU CORP.DEPAPPLICATION REVISIONSＡＢＣＤＥ DRAWING NO. 24W160941 -00NOTEFINISHMATERIALDESCRIPTIONPART NO.QTY TITLE RA775UA GENERAL SYSTEM DIAGRAM SCALE／ APPROVED BY DRAWN BY TRACED BY CHECKED BYITEMSCANNERUNITRB714ADISPLAYUNITRF718ADC PowerSupply10.2∼41.6Vdc(Option I/F)Note 1. 点線はオプション : OptionNMEA I/FforNavigationInter-Connection Cable(10m standard)Power supply Cable7 July H.Iida7 July H.Iida7 July Y.Aso

24W160939ANRITSU CORP.DEPAPPLICATION REVISIONSＡＢＣＤＥ DRAWING NO. 24W160939 - 00NOTEFINISHMATERIALDESCRIPTIONPART NO.QTY TITLE RA775UA INTER-CONNECTION DIAGRAM SCALE／ APPROVED BY DRAWN BY TRACED BY CHECKED BYITEMSCANNERUNITDISPLAYUNITSCAN PCB (X1)1 17 VIOLET +250V4 17 YELLOW GND2 17 BLUE +24V5 RED DAT 43 ORANGE3 +12V7 BROWN BP/SHF6 Braid of RED DAT-RNo. Color FunctionPOWER PCB (X3)12345678910111213141516No. 17 VIOLET 17 BLUE 43 ORANGE Color 17 YELLOW Braid of RED RED BROWN Braid of BROWN GRAY Braid of GRAY Function +250V +24V +12V GND DAT-R DAT NC BP/SHFBP/SHF-R V/TRG NC NC NC V/TRG-R NC NC9 GRAY V/TRG8 Braid of BROWN BP/SHF-R10 Braid of GRAY V/TRG-R7 July H.Iida7 July H.Iida7 July Y.Aso

IndexAAdjustmentDistance ....................................73Angle .........................................73Tuning.......................................74Antenna height..........................75Automatic gain..........................76Automatic STC..........................76ALL PPI Screen...................................62ALL PPI/PPI Screen............................62BBearing scale.......................................25Brightness ...........................................28Brightness of Panel...................28Buzzer..................................................69CChanging setting (CUSTOM)..............66Check box ............................................67Continual variable range (VAR RNG).36,48Contrast...............................................28Course error (XTE)..............................27Cross cursor (+)...................................25DDisplay modes (MODE).......................36,50EEBL ...................................................33,44Bearing of EBL (EBL BRG).......69Echo Menu...........................................54FFalse echoes.........................................5FL VRM, FL EBL ................................34,45FTC ...................................................32,55GGain ...................................................31,54Guard zone (GZ)..................................36,51Guard zone mode (GZ MODE)..71Guard zone level (GZ LVL) .......71HHeading marker ..................................6Heading Off (HDG OFF)...........36,47Heading blink (HM FLSH)........69Heading information (HEAD)...27Hold (HOLD).......................................71LLanguage.............................................71MMark Line............................................49Menu bar.............................................43Man Over Board (MOB) ......................32MOB Screen.........................................63Monitor operation (DISPLAY).............71NNav (Navigation) Menu.......................50Navigation screen................................27North mark (NORTH M)....................6,69OOff-center (OFF-C)..............................37,52Option.................................................84PParallel cursor (///CSR).......................36,47PPI Screen...........................................60PPI/NAV Screen..................................62PPI/PPI Screen....................................61PPI/SEMI3D Screen............................61Pulse table (P TABLE)........................69RRadar interference..............................6Radar screen.......................................25Range..................................................30Range rings (RINGS)..........................36,48Range ring interval...................48Reverse screen ....................................40,63SSemi-3D ..............................................41,61Sleep (SLEEP).....................................52Speed (SPEED, SPD SET)..................71ST'BY..................................................28ST'BY NAV screen..............................69STC ..................................................31,55Stern marker (STERN M)...................69Stretch (ST).........................................39,55Switching the screen (SEL WIN)........40,63System check .....................................64TTarget (TARGET)................................49Track (TRACK)...................................39,56Tune ..................................................38,55Tune meter .........................................25VVAR RNG............................................36,48VRM ..................................................33,45Unit of VRM (RM UNIT)..........69WWay point (WAYP)..............................27Bearing of Way point (WP BRG) ... 69XXTE ..................................................27ZZoom (ZOOM) .....................................39,57

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