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1. 3 1 Basic Menu 555 555555591 25 3 3 Magnifying Long Range Echoes echo stretch 28 29 30 32 33 3 2 Selecting the Presentation 3 5 Suppressing Radar Interference 3 6 Selecting mmn 3 7 Guard Alarm e nh hh hehehe 3 8 Watchman s eee nnne hehehe 3 9 Display Navigation 3 10 OTHER MENU Description 3 11 Function Keys 3 12 Suppressing Noise 3 13 Adjusting Brilliance of n 3 14 Outputting Target Position 4 1 Multiple eno senses one 4 2 Side lobe HIIS 4 3 Indirect m m cee cee cee 4 4 Blind and Shadow n n see eee 20 21 23 23 25 25 27 34 35 36 36 36 37 37 37 38 39 5 MAINTENANCE amp TROUBLESHOOTING 5 1 Preventative Maintenance st eect eee eee nnne nnn 5 2 Replacing the Fuse s stem Hen 5 3 Troubleshooting ss 5 4 Self Test 60606
2. KR 1338 1668 KR 1338 1668 OPERATOR S MANUAL 10 4 TFT LCD COLOR MARINE RADAR SAFETY INSTRUCTIONS DANGER WARNING and CAUTION notices throughout this manual It is the responsibility of the operator and the installer of the equipment to read understand and follows these notices If you have any questions regarding these safety instructions please contact a ONWA agent or dealer WARNING Do not open the equipment Hazardous voltage which can cause electrical shock burn or serious injury exists inside the equipment Only qualified personnel should work inside the equipment Wear a safety belt and hard hat when working on the antenna unit Serious injury or death can result if someone falls from the radar antenna mast Stay away from transmitting antenna The radar antenna emits microwave radiation which can be harmful to the human body particularly the eyes Never look directly into the antenna radiator from a distance of less than 1 when the radar is in operation Turn off the radar power switch before servicing the antenna unit Post a warning sign near the switch indicating it should not be turned on while the antenna unit is being serviced Prevent the potential risk of someone begin struck by the rotating antenna and exposure to the RF radiation hazard Do not disassemble or modify the equipment Fire electrical shock or serious injury can result Turn off the power im
3. 1 I 3 RST 3 MHDRIXIS I 1 GND 5 P56 57 52 I ana 2 I I 1 4 251 r 5 gt 388 91115 45 1 6 I EM Rm I o gis L e TO SCANNER UNIT TO EXT ALARM TO SCANNER UNIT DRAWN DRW NO MARTIN s DISPLAY UNIT E SCANNER UNIT INTERCONNECTION SCHEMATIC DIAGRAM RRA MASS ORGANIZATION BR EXPRESS COMMUNICATION 4 NAVIGATION COMPANY LTD T eerie TRESS A RAS RI 2009 12 15 75 SCANNER UNIT 050 DR NSSS L TRANSCEIVER MODULE ws 7 orig ww aab S ERO TINTA rau am MARTIN KRA 2002 SRE KH 1668 1908 mer ag SCANNER UNIT ore A cavere WUR hp 3 D 76 NAV HEADING DEPTH DATA 12 24 32 SHIP S MAINS SHIP S MAINS 1 NMEA0183 NMEA OUT1 GND GND HEAD
4. SCHEMATIC DIAGRAM AAU POR sif RE ASS 78
5. ennt 5 5 Life Expectancy of 6 INSTALLATION 6 1 Antenna Unit Installation Sitting handling considerations 6 2 Display Unit Installation Mounting considerations 6 3 Exchange of Fuse for 24 32V Power 4 6 4 Checking the Installation tettette temm 6 5 Adjustments nnn nnn 41 41 41 41 cd 44 44 MENU TREE IIIA 60 FOREWORD Thank you for your choice of ONWA MODEL KR 1338 1668 Marine Radar The radar is designed and constructed to meet the rigorous demands of the marine en vironment However no machine can perform its intended function unless properfly installed and maintained Please carefully read and follow the recommended proc edures for installation operation and maintenance While this unit can be installed by the purchaser any purchaser who has doubts about his or her technical abilities may wish to have the unit installed by a ONWA representative or other qualified techician The importance of a through installation can not be overemphasized We would appreciate hearing form you the end user about whether user about user about whether we are achieving our purposes Thank you for considering and purchasing ONWA equipment Features Your radar has a large variety of functions all contained in a remarkably small cabinet The main features of the MODEL KR 1338 are Traditional ONWA reliab
6. thread length washer Spring Platform Washer Hex bolt Apply silicone sealant 1328 MODE NAME KRA 1002 SCANNER UNIT KR 1338 1668 INTERCONNECTION 1250 rare ST RADIATOR S 1 25 RA12 KR 1668 FORWARO M12 BOLT SEAL WASHER CW10530X PLATFORM CENTER OF ROTSTION 4 213 FIXING HOLES 4 4 10 2550 CABLE ENTRY CLAM PLATE a MOUNTING DIMEENSIONS RUBBER PACKING 2002 KR 1668 NAME SCANNER UNIT 73 I I 1 1 1 16803 12V 12V GND 2 Dx 127 3 1 4 4 CMG Current DISPLAY UNIT TX TRIG 6 6 GND PILA B 6 9 I J803 M801 I 1802 BEARING 7 TO DISPLAY UNIT MOTOR 3 ENGODER HEADING 2 _HEADING 1 4 MOTORG 3 MDD UNIT 5 80M 7VVV 40 01 01 4805 5801 _ 5 101 3 Frane 12V 3127 GND 10801 YELLOW Migs SIG 10802 4 GREEN 1421 or MSF1421 IF 0711 TO ANTENNA HY801 7 NJT1668 KR 1688 ONLY 1611 _____ IF UNIT 1 1 1 1 1 1 1 1 1 1 1 1 1 V801 I 1 1 1 1 1 1 1 1 1 1 1 1 I 3 1338 ONLY i TUNE 4 MIBS L gt 5V 6 TO DISPLAY UNIT GND 8 9 MODEL DRW NO
7. ER 1338 KR 1668 Antenna cable KRC 003 10 15 20 10 1520m Display UNIT NMEA le gt 6 Pin MM 2 gt 8 Pin 3M 10 5 to 40VDC 1 PRINCIPLE OF OPERATION 1 1 What is Radar The term RADAR is an acronym meaning RAdio Detection And Ranging Although the basic principles of radar were developed during World War II echoes as an aid to navigation is not a new development 1 2 How Ships Determined Position Before Radar Before the invention of radar when running in fog near a rugged shoreline ships would sound a short blast on their whistles fire a shot or strike a bell The time between the origination of the sound and the returning of the echo indicated how far the ship was from the cliffs or theshore The direction from which the echo was heard indicated the relative bearing of the shore 1 3 How Radar Determines Range Radar determines the distance to the target by calculating the time difference between the transmission of a radar signal and the reception of the reflected echo It is a known fact that radar waves travel at a nearly constant speed of 162 000 nautical miles per second Therefore the time required for a transmitted signal to travel to the target and return as an echo to the source is a measure of the distance to the target Note that the echo makes a complete round tri
8. MARTIN 5 CONNECT TUNING 1338 1668 NAME SCANNER UNIT INTERCONNECTION I AERE pin SCHEMATIC DIAGRAM 5 i 5 ORGANIZATION EI EXPRESS COMMUNICATION amp NAVIGATION COMPANY LTD e p 74 SHIP S MAINS SHIP S MAINS I gt 1 I 1 I I 1 I 1 FILTER BOARD I 1 I I name I I 1 I 0912 MAIN 0804 415141 GPS DC r iE I PWR 2 00 DC 3 GND ajajaja 1 NMEA OUTI 5V 2 HEADING 6 5 5 5 3127 8 3 GND 1 12V s BEARING CEN 1 TO SLAVE 1 s e Hem AC RAIN 1 OP VIDEO I I3 GND T 11301 8 V 0 GYRO IN gt I NMEA 0072 3 GND 2 1 2 4 3 MAIN UNIT 1 m E ECONOMY MOTOR I 8 L 868077 B P51 C _ 5 PNL DIM 3 ECHO IN 3 1 GND POWER BOARD 3 2 VDD33V gt I 4 7 SND T WARNING 8 1 I HP M I 10 10 1 I KEYPAD UNIT 1 I 3
9. particularly to your eyes Never look directly into the antenna from a distance of less than two feet when the radar is in operation as you could injure the cornea of your eyes Always make sure the radar is set to stand by or is turned off before starting work on the antenna unit Period Item Check point Remarks 3 to 6 Exposed Check for corroded or loosened Sealing compound may be used months nuts and nuts and bolts If necessary clean instead of paint Apply small bolts on and repaint them thickly Replace amount of grease between nuts antenna unit them if heavily corroded and bolts for easy removal in future Radome cover Check for wear Permanent damage If crack is found it should be KR 1338 to the antenna s internal circuitry temporarily repaired by using a will result if water leaks into the samll amount of sealing compound radome or adhesive You should then contact your dealer for service 6 months Display unit Check for tight connection and If corroded contact your dealer to 1 year connectors corrosion for replacement 40 Table 5 1 Recommended maintenance program 5 1 Preventative Maintenance Regular maintenance is important for good performance Always keep the equipment as free as possible from dirt dust and water splashes Make sure all screws securing the components are properly tightened A maintenance program should be established and should at least include the items listed
10. 15 Watchman Turn watchman on set rest period or off 16 STBY Disp Select the display on stand by display STBY or navigation data or go into the economy mode 17 Guard Mode Select condition which triggers guard alarm in or out 18 Cursor Posi Display the cursor position in range bearing or at long 19 Alm sense LV Select minimau echo strength which triggers guard alarm 20 Dead Sector Select On to display the dead sector 22 Color setting Set background color amp Echo color 23 Self Test Test keys ROM and RAM check antenna rotation speed and display program number 4 Installation Setup Go to the installation setup menu 34 3 11 Function Keys The function keys F1 and F2 work like the auto dialing feature of teleph one automatically executing the function assigned to them The function can be turned off by pressing appropriate function key again Default settings F1 Background Color F2 Echo Color How to register menu items 1 Press the MENU key 2 Press A C SEA F1 or A C RAIN F2 to open the function menu 3 Select function desired 4 Press the ACQ ENTER key 5 Press the MENU key to close the menu SETTING FOR F1 Sel by omnipad amp press Press MENU key to escape SHIFT EBL RINGS PU INT NOISE PULSE ECHO ROSE TRAIL TRAIL TUNE GUARD ALARM DEAD WATCH IN OUT LEVEL SECTOR
11. 2 2 Display Indication and Markes mmm 2 3Turning the Radar On and Off MIRI 2 4 5555555555555555 65665116 cee nnn 2 5 5555555 555555555555 156666666 2 6 Selecting the 2 7 Adjusting Picture sts 28 display color 2 9 Adjusting Receiver Sensitivity 2 10 Adjusting the A C SEA Control reducing sea clutter 2 11 Apply the A C RAIN reducing rain 55555555 555557 2 12 Erasing the Heading Line North 2 13 Measuring the III gt gt 00000 Ee c d 9 dw a 2 14 Measuring the Bearing eessiesss nes kh sss HER A GER eneses 2 15 Using the Offset EBL 2 16 Shifting off centering the n nn n nn 68688 2 17 MENU OPERATION
12. MAN PANEL MARK CHARA OTHER DIMMER BRILL CTERS MENU EBL VRM WPT UNIT CVVM ESNI ESSR me HIS COLLI AUTO B GR ICM 439 Figure 3 12 Function menu Note In function 2 setup menu item is ECHO COLOR 35 3 12 Suppressing Noise Electrical noise can be suppressed by turning on 8 NOISE REJ on the OTHERS menu 3 13 Adjusting Brilliance of Markers 2 Mark brill on the OTHER menu adjusts the brilliance of markers such as the cursor 3 14 Outputting Target Position Target position data can be output to the navaid in IEC 1162 format Press and hold down the TLL key to output the data This function requires position data and heading signal 36 4 FALSE ECHOES Occasionally false echoes appear on the screen at positions where there is no target In some cases the effects can be reduced or eliminated The operator should familiarize himself or herself with the appearance and effects of these false echoes so as not to confuse them with echoes from legitimate contacts 4 1 Multiple Echoes Multiple echoes occur when a short range strong echo is received from a ship bridge or breakwater A second a third or more echoes may be observed on the display at double triple or other multiples of the actual range of the target as shown in Figure 4 1 Multiple reflection echoes can be reduced and often removed by decreasing t
13. Trail Tone 6 Int Reject 7 Pulselength 8 Noise Reject 9 Traim Time 2 3 BEES 2 3 2 3 2 3 Multi nm 2 On 305 15M M 3M 10 11 Disp Data 12 WPT Mark 13 EBL Ref 14 VRM Unit 15 Watchman 16 STBY Disp 17 Guard Mode Out 18 Cursor Posi L L 19 Alm sense LV Mid Hig 20 Dead Sector off On 21 Range Nu g 2H4 8 16 36 22 Color setting 23 Self Test 24 Installation Setup aBEB BB sB SISSE km sm 5M 10M Econo Nav Ey 1112 3 7 3 6 Selecting Pulsewidth Pulsewidth is the transmission time of a Single radar pulse The longer the pulse width the greater the direction range capability however range accuracy and range resolution are reduced 29 30 3 7 Guard Alarm The guard alarm allows the operator to set the desired range and bearing for a guard zone When ships islands landmasses etc Violate the guard zone an audible alarm sounds and the offending target brinks to call the operator s attention Selection of guard zone type The guard alarm can be set to sound when a target either enters or exits the guard zone You can select which type of guard alarm you want through the menu In alarm The alarm sounds on targets entering the guard zone G IN appears at the top right hand corner when the In alarm is selected Out alarm The alarm sounds on targets exiting the guard zone G OUT appear
14. a closer look at an area of interst 1 Select location with the cursor 2 Press and hold down the F1 A C SEA control about two seconds if its fu nction is set for Zoom default setting or select ZOOM on the menu Zoom appears at the top right corner when the ZOOM function is 23 Cursor Place cursor Press ZOOM Where desired key to zoom Figure 2 13 Zoom Function Notel Zoom is cancelled when range or presentation mode is changed Cancelling Zoom Press the F1 A C SEA control again 24 3 MENU OPERATION 3 1 Basic Menu Operation The menu mostly contains less often used functions which once preset do not require regular adjustment To open or close the menu press the MENU key You can select items on the menu with the omnipad The complete menu app ears on page 1 1 Press the MENU key to display the main menu Sel by omnipad amp press RINGS EBL SHIFT ZOOM OFFSET DISP ECHO ECHO DATA TRAIL STRTCH Change brill from 3 to max OTHER Figure 3 1 menu 2 Press the omnipad to select the item For example select RINGS A message appears at the bottom of the menu window 3 Press the ACQ ENTER key to select setting Each time this key is pressed the message changes For the RINGS menu the message sequence is as shown below Change brill from Off to 1 Change brill from 1 to 2 Change brill from 2 to 3 Change brill
15. clutter suppressed Figure 2 5 Effect of A C RAIN Note In addition to reducing clutter the A C RAIN control can be used in fine weather to clarify the picture when navigating in confined waters However with the circuit activated the receiver is less sensitive Therefore turn off the circuit when its function is not required Automatic adjustments of A C SEA and A C RAIN Push the A C Auto key A C Auto appearstat the bottom left hand corner of the display when the A C AUTO circuit is on You can fine tune by adjusting the A C SEA A C RAIN and GAIN controls 2 12 Erasing the Heading Line North Mark The heading line or north mark available with gyrocompass connection may oc casionally mask a target To view the target you can temporarily erase the heading line and north mark by pressing and holding down the GAIN HM OFF control Release the control to re display the marks 18 Heading Line North mark Figure 2 6 Heading line and north mark 2 13 Measuring the Range You can measure the range to a target three ways by the range rings by the cursor and by the VRM Variable Range Marker By range ring Count the number of rings between the center of the display and the target Check the range ring interval and judge the distance of the echo from the echo from the inner edge of the nearest ring By cursor Operate the omnipad to place the cursor intersection on the inside edge of the garget echo The range t
16. from to max Change brill from max to Off Figure 3 2 Messages for RINGS menu 4 Press the MENU key to close the menu 3 2 Selecting the presentation mode This radar provides four presentation modes Head up course up north up and true motion 1 Press the MENU key 25 2 Operate the omnipad to select MODE 3 Press the ACQ ENTER key With heading sensor connection the display and the display and the display mode indication at the top lefthand corner of the display change in the sequence of HU heading up CU course up NU north up and TM true motion when the ACQ ENTER key is pressed If there is no heading sensor connection the disp lay mode is always HU 4 Press the MENU key to close the menu Note The radar begins operation with last selected display mode except course up whenever the unit is turned on Note however that head up is selected when course up was the last used mode Head up The picture is oriented so the heading line is at the top of the display This mode is useful for navigation in congested waters Course up The course up mode shows Ship s heading by the heading line at the top of the display To get heading desired steer vessel in direction desired and the show CU at the top lefthand corner of the display North up North is at the top of the display and the heading line moves with Ship s heading This mode is useful for determining ship s position and as a navigation mon
17. in table 5 1 5 2 Replacing the Fuse The fuse in the power cable protects the equipment against reverse polarity or ship s mains over current and equipment fault If the fuse blows find the cause before replacing it Never use an incorrect fuse serious damage to equipment may result and void the warranty 12 10 A fuse 24 32 V 5 A fuse 5 3 Troubleshooting Table 5 2 contains simple troubleshooting procedures which you can follow to try to restore normal operation If you cannot restae normal operation do not attempt to check inside any unit of the radar system Any repair work is best left to a qualified technician 5 4 Self Test The self test facility checks the keyboard ROM and RAM for proper operation 1 Press the MENU key 2 Select OTHER MENU 3 Select 23 Self Test and press the ACQ ENTER key The following di splay appears Self Test Key test Press each key and check on screen indication I COURSE NAV 0 0KT TRIGGER NG Program NO ROM RAM OK Hours in use 000006 9H Tx hours 0000001 1H lt Press MENU for OTHERS menu gt Figure 5 1 Self test screen 41 If But Then you pressed the POWER key to turn on the radar the radar has warmed up and you pressed the ST BY TX key to transmit the control panel does not light try adjusting the control panel backlightin
18. menu OND tn BW 63 ARPA MENU Select item by omnipad and press ENTER key Display Off All Cancel Vector Ref Ref Vector Length 30s 1M 3M 6M 15M History 15s 30s 1M 2M 3M 6 CPA Set Off 0 5 1 2nm 5nm Set 1M 2M 3 4M 5M 6 12 Auto ACQ On Figure AP 1 ARP Menu Target under auto tracking but not selected for cursor data reading 2 AUTO TARGET ep Target Full Target selected for data reading Auto Acquisition Area Lost Target Threatening target VRM 0 048NM 0 100NM 0 142HM Own SHIP CURSOR WAYP OINT 34 56 12N 34 29 38N 0 09 NM 135 34 56E 136 35 77E 50 0 M SPD 35 TTG 01 00 TTG 00 20 Figure AP 2 ARPA Display 64 Deactivation the Auto Plotter To deactivate the Auto Plotter 1 Open the ARPA MENU 2 Operate the omnipad to select the 1 Display 3 Operate the omnipad to select Off 4 Press the ACQ ENTER key 5 Press the MENU key to close the menu Acquiring targets Manual Acquisition Follow the steps below to manually acquire a target Up to 10 target can be man ually acquired 1 Place the cursor on a target of interest by operating the omnipad 2 Press the ACQ ENTER key The plot symbol changes its shape according to the status as below A vector app ears in about one minute after acquisition indicating the target
19. rarely possible to place the antenna unit where a completely clear view in all direction is available Thus you should determine the angular width and relative bearing of any shadow sectors for their influence on the radar at the first opportunity after fitting The method of determining blind and shadow sectors appears later in this chapter If you have a radio direction finder on your boat local its antenna clear of the antenna unit to prevent interference to the direction finder A separation of more than two meters is recommended To lessen the chance of picking up electrical interference avoid where possible routing the signal cable near other onboard electrical equipment Also avoid running the cable in parallel with power cables The compass safe distance should be observed to prevent deviation of the magnetic compass Model Standard compass Steering compass KR 1338 0 9m 0 7m 44 Do not paint the radome Model 1338 or to ensure proper emission of the radar waves When this radar is to be installed on larger vessels consider the following points 1 The signal cable run between the antenna and the display comes in lengths of 10 m 15 m 20 m and 30 m Whatever length is used it must be unbroken namely no splicing allowed 2 Deposits and fumes from a funnel or other exhaust vent can adversely affect the aerial performance and hot gases may distort the radiator portion The ant
20. s motion trend If the target is consistently detected for three minutes the plot symbol changes to a solid mark If acquisition fails the target symbol blinks ans disappears shortly One minute after acquisition Vector still unreliable CIRCLE Soild with a vector 3 minutes after acquisition Plot symbol changes to a solid circel indicating the stable tracking condition E LARGE CIRCLE The plot symbol of a target under tracking becomes twice as large as the nor mal symbol when the target is selected for data reading Note 1 The target to be acquired should be within 0 2 to 16 nm from own ship and not obscured by sea or rain clutter for successful acquisition Note 2 When you want to acquire 11th target cancel tracking of less im portant target 65 66 Note 3 When auto acquisition mode Auto is on up to 5 target can be quired For detail see next section titled Automatic Acquisition A WARNING When a tracked target nears another tracked target the targets may be swapped When two target come close to each other one of the two can become a lost targets Should this happen reacquisition of the lost target is required after the two targets have separated Automatic Acquisition The Auto plotter APRA can acquire up to 5 targets automatically by setting the Auto Ac quisition area predefined in the system If Auto is selected after more than 5 targets have be
21. the navigation input includes destination data waypoint position is denoted on the radar display by a dashed ring To turn navigation data on or off Press the MENU key Select the DISP Press the ACQ ENTER key Prss the ACQ ENTER key to set Press the MENU key to close the menu Nn BW TRAIL 779 0 100 OWN SHIP CURSOR WAYPOINT 34 56 12N 34 29 38N 0 09 NM 135 34 56E 136 35 77E 50 0 M SPD 35 TTG 01 00 TTG 00 20 Press the ACQ ENTER key to select the message for Navigation display Waypoint Mark Navigation Data Figure 3 11 Typical navigation data display 33 3 10 OTHER MENU Description Table 3 2 OTHER MENU Description Description WENN brilliance of VRM EBL cursor guard zone and WP marks 4 Characters Select brilliance of characters Select pulselength for 1 5 and 3 mile ranges 5 Nosie Reject elect On to reject nosie Select the trail time 10 Tune Select automatic or manual tuning To tune manually 1 Select Menu by the omnipad 2 Press the ENTER key to enable manual tuning 3 While pressing and holding down the GAIN control operate the omnipad 4 Press the ENTER key MANUAL appears at the top right hand corner when manual tuning is in effect Select On to display the waypoint mark Select EBL reference for relative or true 14 Unit Select On to display the waypoint mark
22. the radar is available for use at anytime but no radar waves are being transmitted Press the ST BY TX key to transmit When transmitting any echoes from targets appear on the display This radar displays echoes in eight tones of green according to echo strength 2 5 Stand by When you won t be using the radar for an extended period but you want to keep it in a state of readiness place it in stand by by pressing the ST BY TX key The display shows STAND BY navigtion data or goes into the economy mode depending on menu setting More on menu operation later Economy mode The CRT can be set to automatically turn itself off when in stand by to reduce power consumption This feature is called the economy mode Power consu mption in the economy mode is 28W When economy mode is no the lamp ne xt to the POWER key lights Navigation data display during stand by If a navigation aid inputs navigation data to this radar navigation data can be displayed during stand by You can turn the navigation data display on off thr ough the menu Figure 2 3 shows a typical navigation data display during stan dby Note 1 Availability of a particular display item depends on incoming data Note 2 When Range to Waypoint reaches 0 1nm the WPT mark jumps to dead ahead even though a difference may exist between heading and BRG to WPT Note 3 When cross track error exceeds 1 nm on either side the XTE mark st arts blinking 13 5 T
23. 0 C Display unit 10 C to 50C 13 Humidity Relative humidity 93 or less at 40 C 14 Power supply amp power consumption 12V 24V or 32VDC 10 5V to 40 VDC 60W 15 Compass safe distance ONIN Standard Compass Steering Compass Display unit 0 75m 0 6m Antenna unit 3 1m 1 75m KR 1668 SPECIFICATION ANTENNA UNIT Radiator Slotted waveguide array Radiator length 120 cm Horizontal beamwidth 1 9 Vertical beamwidth 22 Sidelobe Within 20 off mainlobe less than 24 dB Outside 20 off mainlobe less than 30 dB 6 Polarization Horizontal aA BW 7 Antenna rotation speed 24 rpm 8 Wind resistance Relative wing speed 100 knots 51 5 m s TRANSCEIVER MODULE contained in antenna 1 Transmitting tube MAF1421 or MSF1421 2 Peak output power 4kW nominal 3 Pulselength amp pulse repetition rate 0 08 u S 2100 Hz 0 125 0 25 0 5 0 75 1 5nm 0 3 u S 1200 Hz 1 5 2 3nm 0 81 S 600 Hz 3 4 6 8 12 16 24 36 48 64011 4 Bandwidth Tx pulselength 0 34 S and 0 081 S 25MHz Tx pulselength 0 80 S 5 MHz 5 Other See KR 1338 DISPLAY UNIT 1 Range scale nm Range Range interval and no of Rings 0 123 0 0625 2 0 25 0 125 4 0 75 0 25 3 1 0 25 4 1 5 0 5 3 2 0 5 4 3 1 3 4 1 4 6 2 3 8 2 4 12 3 4 16 4 4 24 6 4 36 12 3 48 12 4 64 16 4 2 Compass safe distance Standard Compa
24. 2 transmission Figure 6 21 Blank areas where transmission is suspended 58 This area can be turned on off on the OTHER MENU For detail see the descrip tion on page 18 Note This setting should be done after other adjustment are finished Magnetron heater voltage Magnetron heater voltage is formed at the MOD Board of the antenna unit and pre adjusted at the factory for use with any length of signal cable Therefore no adju stment is required However verify heater voltage by following the procedure below 1 Turn on the radar if it is not already on and set it in stand by 2 Open the antenna housing radome cover Connect a multitester set to 10 DC range Model Check point Rating Adjustment Point KR 1338 Tp803 4 6 7 4 7 6V VR801 on MD Borad KR 1668 Tp803 4 6 7 4 7 6V VR801 on MD Borad 3 Close the antenna housing cover and tighten the fixing bolts 59 RINGS Off 1 2 3 max EBL OFFSET On SHIFT On ZOOM Off On MODE HU CU NU TM DISP DATA ECHO TRAIL Off On ECHO STRTCH Off ES1 ES2 ARPA MENU OTHER MENU 60 1 Display 2 AllCancel 3 Vectpr ref 1 Dimmer 1 2 3 4 4 Vector Length 2 Mark Brill 1 2 3 4 5 History 3 HD Mark 1 2 3 4 6 CPASET 4 Characters 1 2 3 4 7 SET 8 AUTO ACQ 5 Trail Tone Single Multi 6 Int Reject Off 1 2 3 7 Pulselen
25. EBL VRM CONTROL key 5 Press the onmipad to bisect target B with EBL1 Check the EBL1 readout to find the bearing between target A and target 6 Press the EBL VRM SELECT key to choose readout Press the omnip ad to place the outside edge of VRMI on the inside edge of target B Check the VRM readout to find the range between target A and target B 7 To cancel select EBL OFFSET on the menu and press the ACQ ENTER key EBL1 VRM EBL1 70 0 R 4 5 NM VRM1 Bearing Range Figure 2 11 Measuring the range and bearing between two targets by using the offset EBL 22 2 16 Shifting centering the Picture Your vessel s position can be shifted up to 75 not available on 48nm range of the range in use to view the situation around your vessd without changing the range or size of targets 1 Press the omnipad to set cursor where desired 2 Press the FI A C SEA control if its function is set for SHIFT default se tting or select SHIFT on the menu OFFCENTER appears at the top right co rner of the display when the picture is shifted Cursor Cursor Place cursor Press OFF CENTER Where desired key to off center display Figure 2 12 Shifting the picture Cancelling shifted picture Press the 1 SEA control again 2 17 Zoom The zoom feature allows you to double the size of the area between your vessel and any location within the current range to take
26. ING DEPTH DATA 0183 SLAVE DISPLAY TO EXT BUZZER 06106002 ANVdINOO NOLIVDIAVN X M0IIMV IM IMM0 4 e zi E NANI 4 NOLLVZINVO3O WN SEET AA IWY ON L00 86CL MVX5VI0 OLLVINSHOS NOLLOSNNOOH LNI NMEA OUT3 OP VIDEO 1 2 4 5 6 NMEA 2 ECHO amp GYRO 200L 09V LINN AV IdSIG KRC 003 10 15 20 TX TRIG PILA BEARING MOTOR HEADING MOTOR C TUNING IND GND VIDEO TUNING LINN VNNS INV 2001 VSM 17 2 ORANGE WHITEBLUE TEISSER SHIELD BROWN MBSL ORANGE _____ CONT XILLOW 01 clo ________ XII LCM OVEN 3 9 XM ILD IND MI WHITE RED GND XIDRO 8 12 297 IND 3 960 MM BROWN S DRAWN MODEL MARTIN 1338 1668 BAMI T 004 SIGNAL CARLE Wik 33 20 ORGANIZATION d SCALE Dulin 2407 12 15 Jat lofl
27. RIPS 5 9 10 5 TEMPERATURE Depth 125 m 17 3 C lt Trip distance since power on To Waypoint bearing heading Heading Course CRS 180 0 TTG 01 08 gt BRG 450 M RNG 12 0NM Time to go to TO Waypoint OWN SHIP Ship s position in latitude and longitude LAT 30 00 00N LON 135 00 00E Cross Track Error Mark shows direction and amount Figure 2 3 Typical navigation data display during stand by 2 6 Selecting the Range The range selected automatically determines the range ring interval the number of range rings pulselecgth and pulse repetition rate for optimal detection capability in short to long ranges You can select which ranges and pulselength for 1 mile range to use through the menu The range range ring interval and pulselength appear at the botton left hand corner of the display To select a range When navigating in or around crowded harbors select a short range to watch for possible collision situations If you select a lower range while on open water increase the range occasionally to watch for vessels that may be heading your way 2 7 Adjusting Picture Brilliance The BRILL key adjusts the brilliance of the radar picture in eight levels Press the BRILL key to set the brilliance level The current level momentarily appears on the scree
28. aighten Target and press ENTER key Correction 0 000 nm lt Press MENU for inst setup gt Figure 6 19 Sweep timing adjustment message 4 Operate the omnipad to straighten the target selected at step 2 and then press the ACQ ENTER key 57 Adjusting MBS Ban Suppression Adjustment 0 00 0 25 Main bang black hole which appears at the display center on short ranges can be suppressed as follows 1 Transmit on long range about 10 minutes 2 Adjust the gain to show a small amount of noise on the display 3 Change to the 0 125 nautical mile range and adjust the A C SEA control 4 Select 11 MBS adjustment on the installation setup menu 5 Press the ACQ ENTER key The following message appears MBS Adjustment 1 Set value by omnipad and press ENTER key Correction 000 lt Press MENU for inst setup gt Figure 6 20 MBS Adjustment message 6 Operate the omnipad to suppress main bang Left low right between 0 and 25 7 Press the ACQ ENTER key Setting a blanking area When the antenna is installed at a close distance in front of the wheelhouse the radar should be set not to transmit within that area No echoes appear in the bla nking areas Select 7 Dead Sector Press the ENTER key Operate the omnipad to enter staring point of area in figures Press the ENTER key Operate the omnipad to enter ending point of area in figures Press the ENTER key Nn gt C
29. alculates motion trends range bearing course speed CPA and TCPA of all targets under tracking at the ARP Data area To turn ARP data on 1 Press the MENU key 2 Select the DISP DATA 3 Press the ACQ ENTER key to select the message for ARP NAV and ARP 4 Press the ACQ ENTER key to set 5 Press the MENU key to close the menu CAUTION At the speed under 5 kts the target data is displayed with a delay because of the filtration Place the cursor on a wanted target and press the SELECT CANCEL key Data on the selected target is displayed at the bottom of the screen The symbol of the selected target gets twice as large as the normal circle The data includes the follows RNG RBG Range Bearing Range and bearing from own ship to the last plotted or selected target position with suffix T Ture or M Magnetic For ture bearings suffix T is used in case of gyrocompass input and suffix M is used in case of magnetic compass input 67 COURSE SPEED Course Speed Course and speed are displayed for the lastplotted or selected target with suffix Ture M Magnetic For true bearings suffix T is used in case of gyrocompass input and suffix M is used in case of magnetic compass input CPA Closest Point of Approach is the closest range a target will approach to own ship Do not mix it with the operator preset CPA alarm limit TCPA is the time to CPA measured with present speeds of own ship a
30. ased on what radar targets are selected the radar must always be optimally tuned for use with it to ensure that required targets will not be lost or unwanted targets such as sea returns and noise will not be acquired and tracked A target echo does not always mean a landmass reef ships or other surface objects but can imply returns from sea surface or precipitation As the level of these returns varies with environment the operator is required to properly adjust the STC ant clutter sea FTC anti clutter rain and GAIN controls to ensure that target echoes within the affected area are not eliminated from the radar screen The optimum settings of these controls may slightly differ between the normal radar operation and plotting and it is recommended to readjust them in accordance with the operating mode selected The installation must be done by a ONWA representative or suitably qualified radar technician Authorities require this Keep magnets and magnetic fields away from the equipment Magnetic fields will distort the picture and can cause equipment malfunction Be sure the unit is well away from equipment which gives off magnetic fields speaker power transformer etc The following items affect calculation accurary e echo intensity e radar transmission pulsewidth e radar bearing error e gyrocompass error e own vessel or other vessel course change Data for CPA TCPA ect Are approximations only Always use data
31. ayed Heading line Targets Range and bearing of a target relative to own ship are readable on the PPI Own ship Own ship radar in center A Bird s eye view of situation B Radar picture of A Figure 1 1 How radar works 10 2 BASIC OPERATION 2 1 Control Description I Omnipad Shifts cursor VRM and EBL select items and options on gt 1 Acquires the target selected gt with the ominipad A 2 Registers selection on menus Brief press Displays the data of target selected with the cursor Long press Terminates plotting of the target selected with the cursor fsELECT 1 ACQ Opens closes menus CANCEL 2 2 d I Sets guard zone area 27 ff MENU GUARD SSS S Selects RANGE Sets radar range EBL1 EBL2 VRM1 VRM2 EBL VRM _ Enableserasss CONTROL EBL1 EBL2 EBL3 EBL4 Control 21 sensitivity TLL _ Outputs target position data SN Temporarily erases heading line and north mark if displayed 7 uw Control 222 AC AUTO Automatically reduces sea _ in clutters Reduces sea clutter ANS 4 Switch 5 Long pres
32. close the menu Nm BW 69 The flashing of the triangle plot symbol and vector remain on the screen until the dangerous situation is no longer present or you intentionally terminate tracking of the target by using the SELECT CANCEL key Lost Target Alarm When the system detects a loss of a tracked target the target symbol becomes a flashing diamond 70 130 5 p 276 8 27 5 CJ d Cj _ J 2 B 2 14 lt gt 276 8 CI lt I I I III 6 9 56 310 KRD 1003 KR 1338 KR 1668 NAME DISPLAY UNIT 71 72 CABLE ENTRY 4 M10 Antenna base plate Packing Effective Radome
33. e 1 30 minutes Modulator FET switching method LF 60MHz Tuning Automatic or manual Receiver front end MIC Microwave IC 10 Bandwidth Tx pulselength 0 3 u S and 0 08 u S 25MHz Tx pulselength 0 8 u S 3MHz 11 Duplexer Circulator with diode limiter DISPLAY UNIT 1 Indication system LCD digital display 2 Display 10 4 LED backlight 32 bit TFT Color LCD Display 3 Range scale nm Range Range interval and no of Rings 0 125 0 0625 2 0 25 0 125 4 0 75 0 25 3 1 0 25 4 1 5 0 5 3 2 0 5 4 3 1 3 4 1 4 6 2 3 8 2 4 12 3 4 16 4 4 24 6 4 36 12 3 Bearing resolution 4 Bearing accuracy Within 1 Range discrimination Better than 30 m Range ring accuracy 0 9 or range in use or 8 m whichever is larger Minimum range Better than 25 m Markers Heading line Bearing scale Range ring VRM EBL Tuning indicator Cursor Alarm zone North mark heading sensor input required 10 Alphanumeric indication Range Range ring interval Pulselength Interference rejection IR VRM EBL Stand by ST BY Radar alarm Echo stretch ES Range to cursor Bearing to cursor Echo trailing TRAIL Trail time Trail elapsed time Navigation data navigation input required heading HDG heading sensor input required 11 Vibration Vibration Total amplitude 1 to 12 5 Hz 1 6mm 12 5 to 25 Hz 0 38mm 25 to 30 Hz 0 10mm 12 Temperature Antenna unit 25 C to 7
34. ect echoes may be recognized as follows they usually occur in a shadow sector they appear on the bearing of the obstruction but at the range of the legitimate contact when plotted their movements are usually abnormal and their shapes may indicate they are not direct echoes 4 4 Blind and Shadow Sectors Funnels stacks masts or derricks in the path of antenna may reduce the intensity of the radar beam If the angle subtended at the antenna is more than a few degrees a blind sector may be produced Within the blind sector small targets at close range may not be detected while larger targets at much greater ranges may be detected See Figure 4 4 Vessel taller than wharf Mast etc In path of radar beam Wharf Wharf 1 Blind sector gt Size of blind sector depends on target size and range Figure 4 4 Blind and shadow sectors 39 5 MAINTENANCE amp TROUBLESHOOTING This chapter tells you how to keep your radar in good working order Before reviewing this chapter please read the safety information which follows DANGER Turn off the power before performing any maintenance or troubleshooting procedure Hazardous voltages can shock burn or cause death Only qualified personnel totally famillier with electrical circuits should work inside the units RF RADIATION HAZARD The radar antenna emits high frequency radio radiation which can be harmful
35. eight above the waterine Low 3 m Mid 3 6m or High 6 10 m 3 Press the ACQ ENTER key Aligning heading Adjustment sector 0 359 90 You have mounted the antenna unit facing straight ahead in the direction of the how Therefore a small but conspicuous target dead ahead visually should appear on the heading line zero degrees In practice you will probably observe some small error on the display because of the difficulty in achieving accurate initial positioning of the antenna unit The foll owing adjustment will compensate for this error 1 Identify a suitable target for example ship or buoy at a range between 0 125 to 0 25 nautical miles preferably near the heading mark To lessen error keep ec hoes in the outer half of the picture by changing the range Aiso be sure the zoom and off center functions are off 2 Select 9 Heading Alignment on the installation setup menu and press the ACQ ENTER key The following message appears on the display Heading alignment Set EBL1 to center of target dead ahead and press ENTER Correction 0 0 Press MENU for inst setup Figure 6 17 Heading alignment message 3 Operate the omnipad to bisect target selected at step 1 with the heading line 4 Press the key 5 As a final test move the boat towards a small buoy and confirm that the buoy shows up dead ahead on the radar when it is visually dead ahead Adjusting sweep timing Adjustme
36. en manually acquired only the remaining capacity of targets can be automatically acquired Example when 7 targets acquired manually then the Auto ACQ is switched on only 3 targets can be acquire automatically When five targets have been automatically acquired AUTO TARGET FULL message appears at top left corner on the display Setting Auto Acquisition Area Auto acquisition area 1s predefined between 2 0 and 2 5 nm in range and 45 on either side of the heading line in bearing If a target come into this area it is acq uired automatically Figure AP 3 Auto acquisition area Follow the steps shown below to activate the auto acquisition area 1 Open the ARPA MENU 2 Select 8 Auto ACQ by operating the omnipad 3 Operate the omnipad to select On 4 Press the ACQ ENTER key 5 Press the MENU key to close the menu Terminating Tracking of Targets When the Auto Plotter has acquired 10 targets no more acquisition occurs unless targets are lost Should this happen cancel tracking of individual target or all tar gets by the procedure described below Individual Targets Place the cursor on a target which you do not want to be tracked any longer by operating the omnipad and press andgold down the SELECT CANCEL key All Targets All targets can be canceled from ARPA MENU at a time 1 Open the ARPA MENU 2 Select 2 Cancel 3 Press the ACQ ENTER key Displaying Target Data The Auto Plotter c
37. enna unit must not be mounted where the temperature is more than 70 C Mounting KR 1338 Figure 6 1 Typical antenna unit location Unpacking the antenna unit 1 Open the antenna unit packing box carefully 2 Unbolt the four bolts at the base of the radome to remove the radome cover Radome cover ONWA Figure 6 2 Antenna unit 45 Mounting platform Holes for antenna unit The mounting surface must be parallel with the waterline and provided with four holes whose dimensions are shown in the outline drawing attached at the end of this manual The unit is adjusted so a target echo returned from the bow direction will be shown on the zero degree heading line position on the screen When drilling holes be sure they are parallel with the fore and aft line 3 Prepare a platform of 5 to 10 millimeters in thickness for the antenna unit 46 Find the cable entry on the radome base Next position the radome base so the cable entry faces the stern direction This alignment must be as accurate as possible Fasten the radome base to the mounting platform with four each of M10 x 30 hex bolts flat washers and spring washers SHIP S BOW 4 0 12 HOLES FLAT WASHER SPRING WASHER EIE HEX BOLT a Antenna base plate Packing Effective thread length 25mm MEN JH e washer Spring Platform washer Hex bolt Apply silicone sealant Figure 6 3 How to fasten
38. g on the OTHERS menu battery may have discharged check fuse in power cable nothing appears on the display or display contrast is poor characters are distorted the antenna does not rotate try adjusting the brilliance request service the problem may be in antenna unit Request service Characters and indications are abnormal have a qualified technician check the set you have adjusted the gain with A C RAIN and A C SEA off neither noise nor targets appear indications and markers do check signal cable for damage neither indications nor markers appear noise and targets do have a qualified technician check the set the sweep radial line sweeping around the display is not synchronized with antenna rotation the problem may be in the antenna unit Request service there is no change in sensitivity request service a key is pressed nothing happens key may be faulty Request service Table 5 2 Troubleshooting table 4 The ROM and are automatically checked If NG Good appears to the right of ROM or RAM indication contact your dealer for advice ARP 10 TEST results appear only when optional ARP 10 board is mounted 5 To check the keyboard press any key except the omnipad ACQ and power keys except the omnipad ACQ and power keys Its corresponding location on the disp lay lights in black if the key is o
39. gth Short Long 8 Noise Reject Off On 9 Trail Time 15S 30S 1M 3M 6M 15M 30M Cont 10 Tone Auto Manu 11 Disp Data Off Nav ARP 12 WPT Mark Off On 13 EBL Ref Rel True 14 VRM Unit nm km sm 15 Watchman Off 5M 10M 20M 16 STBY DISP Norm Econo Nav 17 Guard Mode In Out 18 Cursor Posi B R L L 19 Alm Sense LV Low Mid High 20 Dead Sector Off On 36 1016 21 Range 36 48 1048 1 8 1 4 1 2 3 4 1 1 5 2 3 4 6 8 12 16 24 36 48 64 1064 22 Color Setting 23 Self Test 24 Installation Setup 1 Nav Talker GPS 2 Depth unit m fa ft 3 Temp Unit C F 4 Hdg Sensor Magnet Gyro 5 Key Beep Off On 6 Scan Stop Rotate Stop 7 Dead Sector 8 Tune Video Adjustment 9 Heading Alignment 10 Sweep Timing Adjustment 11 MBS Adjustment 12 Ant Height Low Mid High 13 STC Curve Sharp std 14 Mode Master Slave 15 Hours in Use 16 TX Hours A WARNING This auto plotter is not designed to replace the human eye make decisions for navig ator It is intended for use as an aid to navigation Always maintain a watch while underway Data obtained from this auto plotter should always be double checked against other sources to verify the reliability of the data This auto Plotter automatically tracks a acquired radar target and calculates its course and speed Indicating it by a vector Since the data generated by this unit are b
40. h in IEC 1162 NMEA 0183 data fo rmat depth can be displayed on the radar screen NMEA 1 connector 1 3 3V 2 Input 1 3NMEA Output 1 AGND 5 GND 6 SPARE NMEA 2 connector 1 3 3 2 NMEA Input 2 3 NMEA Output 2 4 GND 5 Input 3 6 NMEA Output 3 7 GND 8 GND 4 Upgrade interface for radar software upgrades CAUTION Replace the fuses to 5 A for 24 32 VDC set GND x Option Power GND Fuse Holder Upgrade NMEA 1 Connector NMEA 2 Connector CAUTION Ground the equipment Ungrounded equipment can give off or receive electro magnetic interference or give electrical shock Figure 6 14 Connections on the display unit 53 6 3 Exchange of Fuse for 24 32V Power Supply The power cable comes with a 10A fuse in the fuse holder This fuse is for use with a 12V DC power supply For 24V 32V DC power supply replace
41. he display 2 15 Using the Offset EBL The offset EBL provides two functions predict collision course of radar target and measure the range and the bearing between two targets Predicting collision course 1 Press the omnipad to place the cursor on the center of the target 2 Press the EBL VRM SELECT key to choose EBLI readout and then press the EBL VRM CONTROL key 3 Select EBL OFFSET on the menu and press the ACQ ENTER key 4 Press the EBL VRM CONTROL key 5 Operate EBL1 so it passes through the center of the target If the target tracks along the EBL towards the center of the display you vessel s Position the target may be on a collision course To cancel select OFFSET and press the key 21 origin Initial position of target VRM1 Target moved Here Offset EBL EBL1 EBL VRM1 EBL1 gt 70 0 6 0 VRM1 bearing range Figure 2 10 Predicting collision course by using the offset EBL Measuring range and bearing between two targets The procedure which follows shows how to measure the range and bearing betw een target A and target B in Figure 2 11 1 Press the omnipad to place EBL I s origin cursor on the center of target A 2 Press the EBL VRM SELECT key to choose readout and then press the EBL VRM CONTROL key 3 Select EBL OFFSET on the menu and press the ACQ ENTER key EBLI s origin shifts to cursor 4 Press the
42. he sensitivity or properly adjusting the A C SEA True Echo Own ship Multiple echo Figure 4 1 Multiple echoes 4 2 Side lobe Echoes Every time the antenna rotates some radiation escapes on each side of the beamcalled side lobes If a target exists where it can be detected by the side lobes as well as the main lobe the side lobe echoes may be represented on both sides of the true echo at the same range as shown in Figure 4 2 Side lobes show usually only at short ranges and from strong targets They can be reduced through careful reduction of the sensitivity or proper adjustment of the A C SEA 37 Main l be True echo Sprious target Antenna Figure 4 2 Side lobe echoes 4 3 Indirect Echoes Direct Heading path Target Indirect path Obstruction Antenna mast funnel etc Target True Indirect Indirect echo path Direct echo Heading line shi True echo Indirect Indirect echo echo Figure 4 3 Indirect echoes 38 Indirect echoes may be returned from either passing ship or returned a reflecting surface on your own ship for example a stack In both cases the echo will return from a legitimate contact to the antenna by the same indirect path The echo will appear on the same bearing of the reflected surface but at the same range as the direct echo Figure 4 3 illustrates the effect of an indirect echo Indir
43. ility and quality in a compact lightweight and low cost radar Durable brushless antenna motor On screen alphanumeric readout of all operational information e Standard features include EBL Electronic Bearing Line VRM Variable Range Marker Guard Alarm Display Off Center and Echo Trail e Watchman feature periodically transmits the radar to check for radar targets which may be entering the alarm zone Ship s position in latitude and longitude and range and bearing to waypoint and ship s speed heading course can be shown in the ottom text area Requires a navigation aid which can output such data in IEC 1162 format Zoom feature provided KR 1338 SPECIFICATION ANTENNA UNIT aA BW Radiator Slotted waveguide array Radiator length 55 cm Horizontal beamwidth 4 Vertical beamwidth 25 Sidelobe Within 20 off mainlobe less than 18 dB Outside 20 off mainlobe less than 23 dB Polarization Horizontal Antenna rotation speed 24 rpm 2 Wind resistance Relative wing speed 100 knots 51 5 m s TRANSCEIVER MODULE contained in radome 1 NO WANN Transmitting tube MSF1421B or MAF1421B 2 Frequency 9410 MHz 30MHz 3 4 Pulselength amp pulse repetition rate Peak output power 4kW nominal 0 08 S 2100 Hz 0 125 0 25 0 5 0 75 1 5nm 0 3 L S 1200 Hz 1 5 2 3nm 0 8 S 600 Hz 3 4 6 8 12 16 24 36nm Warm up tim
44. ith the scanner housing surface Radiator bracket E gt Ship s J bow i H MI stern direction Qo 7 Slotted pin Figure 6 11 How to insert slot pins 50 3 Now is the time to the radiator to the radiator bracket Apply anticorrosive sealant silicone sealant to hatched areas to prevent corrosion See the figure below Apply silicone sealant into threaded holes on the scanner radiator Remove the cap on the radiator bracket and orient the radiator bracket as shown in Figure 6 12 Apply grease to the O ring and set it to the center of the radiator bracket Coat the radiator fixing bolts with silicone sealant Fasten the radiator to the radiator bracket with the ONWA logo on the radiator facing ship s bow Scanner radiator N Apply silicone sealant into threaded holes __ O ring Radiator bracket Flat washer Spring washer Hex head bolt M8 x 30 Coat bolts with Silicone sealant 7 Note Apply anticorrosive sealant to hached areas antenna bracket for RA12 type radiator Figure 6 12 Fastening the radiator to the radiator bracket 4 Open the antenna housing cover and fix the stay as shown in Figure 6 13 5 One end of the cable with 15 9 and 7 way plugs has already been connected to CON 0906 inside the scanner housing Mate the 15 and 9 way plugs with jacks J812 and J811 on the transceiver module respectively C
45. itor on a nautical chart The picture is stabilized against yaw of vessel thereby reducing of target echoes True motion True motion displays own ship and moving objects in their true motion 33 Magnifying long range echoes echo stretch Normally the reflected echoes from long range target appear on the display as weaker and smaller blips even though they are compensated by the radar s internal circuitry The echo stretch function magnifies these small blips in all ranges Two types of echo stretch are available ES1 which stretches echoes in bearing direction and ES2 which stretches them in both range and bearing directions To turn the echo stretch on or off 1 Press the MENU key to open the menu 2 Select ES 3 Each press the ACQ ENTER key changes the echo stretch function in the seq uence of ES1 ES2 and OFF 651 or ES2 appears at the top right hand corner of the display when echo stretch is on 26 Bearing Bearing direction direction gt Range direction Echo stretch 1 Echo stretch 2 Figure 3 3 Echo stretch Note This function magnifies not only targets but also sea clutter and radar inter ference For this reason be sure the controls for adjustment of sea clutter and rad ar interference are properly adjusted before activating the echo stretch Note ESI is not available on Short Range 3 4 Echo Trail You can show the movement of all radar targets relative to you
46. learance both to get to the connectors behind the unit and to allow you to get your hands in on both sides to loosen or tighten the mounting knobs Make sure you leave at least a foot or so of service loop of cables behind the unit so it can be pulled forward for servicing or easy removal of the connectors The compass safe distance of 0 8 meters standard compass and 0 6 meters steering compass should be observed to prevent deviation of the magnetic compass Mounting The display unit is designed to be mounted on a tabletop or bulkhead 1 Using the hangar as a template mark screw locations in the mounting location 2 Fix the hanger to the mounting location with four M6 tapping screws supplied 3 Fit the knob bolts to the display unit Install the display unit in the hunger Tighten the knob bolts securely 52 Connections 1 Connect the power cable to the power cable connector on the rear of the display unit 2 Connect the signal cable to connector on the rear of the display unit 3 Run a ground wire local supply between the ground terminal on the rear of the display unit and the ship s superstructure Navigation aid video sounder connection If your navigation aid can output data in IEC1162 NMEA 0183 data format your vessel s position in latitude and longitude the range and bearing to waypoint spe ed and course may be input to this radar and be seen on the screen Further if your video sounder can output dept
47. mediately if water leaks into the equipment or the equipment is emitting smoke or fire Continued use of the equipment can cause fire or electrical shock Do not place liquid filled containers on the top of the equipment Fire or electrical shock can result if a liquid spills into the equipment A CAUTION Use of a wrong fuse can result in fire or permanent equipment damage Use the proper fuse Do not use the equipment for other than its intended purpose Personal injury can result if the equipment is used as a chair or stepping stool for example Do not objects on the top of the equipment The equipment can overheat or personal injury can result if the object falls I TABLE OF CONTENTS FOREWORD Features Model 1338 SPECIFICATION 1 1 What is Radar ett 1 2 How Ships Determined Position Before 1 3 Determines Range 1 4 Determines Bearing trees rd dia POR EU ER Ys 1 5 Radar Wave Speed and Antenna Rotation 1 6 The Radar Display 2 BASIC 2 1 Control Description e
48. n 14 2 8 Setup display color In order to adapt to the different environments the radar echo display the back ground color and echo color can be set by users themselves there are five kinds of background colors and three kinds of echo colors available Setting methods are as follows 1 menu 1 Press MENU key open main menu 2 Select OTHER MENU and press ACQ ENTER key 3 Press A Jor IV key select 22 Color setting amp press ACQ ENTER key open the color setup menu Color setting 1 Background setting Black green Black red Blut white DK blue white White green 2 Echo Color Yellow Green Multi Color Press MENU key to escape gt 4 Press A or select Background Color or Echo Color use 4 or gt select color desired and press ACQ ENTER key 5 Press MENU key to close the menu 2 Using the function key The function keys F1 function default setting for Background Color F2 key default setting for Echo Color Directly on the keyboard you can press these two keys select the desired color setting 15 2 9 Adjusting Receiver Sensitivity The GAIN control adjusts the sensitivity of the receiver It works in precisely the same manner as the volume control of a broadcast receiver amplifying the signals received The proper setting is such that the background noise is just visible on the screen If you set up for too little sensitivity weak echoes may be mi
49. nd the targets Both CPA and TCPA are automatically calculated When a target ship has passed clear of own shop the CPA is displayed and the TCPA appears as TCPA is counted up to 99 9 min And beyond this it is indicated as TCPA gt 99 9 min Mode and length of Vectors Ture or Relative Vector Target vectors are displayed in relative or true mode Own shop does not have a vector in relative mode Vector Length From the ARPA MENU Vector Length can be set to 30 seconds 1 3 6 15 or 30 minutes and the selected vector time is indicated on the screen The vector tip shows an estimated position of the target after the selected vector time elapses It can be valuable to extend the vector length to evaluate the risk of collision with any target Past position Display The Auto Plotter displays equally time spaced dots maximum 5 dots marking the past positions of any targets being tracked If a target changes its speed the spacing will be uneven If it changes the course its plotted course will not be a straight line in TM mode Operational Warnings There are two main situations which cause the Auto plotter to trigger visual and audible alarms CPA TCPA alarm e Lost target alarm 68 Alarm Visual and audible alarm generated when the predicted CPA of target become less than their preset limits The audible alarm continues for 10 se conds The Auto plotter ARPA continuously monit
50. ne drawing 2 Detach the antenna housing cover from the antenna housing by loosening four fixing blots The antenna housing cover fitted with the transceiver module can be stored in a convenient place until the wiring to the antenna unit is done 3 Place the antenna bousing on the mounting platform and orient it as shown in Figure 6 6 bow bow Figure 6 6 How to orient the antenna unit 4 Insert four M12 x 60 hex head bolts with the seal washers from inside the ante nna housing to prevent the bolts from contacting the transceiver module Install the seal washer with the larger diameter next to the head of the bolt Coat flat and spring washers and nuts and then use them to fasten the antenna housing to the mounting platform Finally coat exposed parts of nuts bolts and flat and spring washers as shown in Figure 6 7 48 Note Tighten the bolts by their nuts to prevent damage to the seal washer Do not turn the bolts to secure the antenna housing Hex head bolt 12 60 Seal washer lt 28 7 27 O Silicone Flat washer sealant 2 Spring washer pring Hex head nut Figure 6 7 How to mount the antenna housing Connections Only the signal cable runs from the display unit to the antenna unit Make the hole for passing the cable through the bulkhead or deck at least 20 millimeters diameter In order to minimize the chance of picking u
51. nt range 0 000 4 266nm This adjustment ensures proper radar performance especially on short ranges The radar measures the time required for a transmitted echo appears on the display based on this time Thus at the instant the transmitter is fired the sweep should start from the center of the display sometimes called sweep origin A trigger pulse generated in the display unit goes to the antenna unit through the signal cable to trigger the transmitter magnetron The time taken by the signal to travel up to the antenna unit varies depending largely on the length of signal cable During this period the display unit should wait before starting the sweep When the display unit is not adjusted correctly the echoes from a straight local object for example a harbor wall or straight pier will not appear with straight edges namely they will be seen as pushed out or pulled in near the picture center The range of objects will also be incorrectly shown 1 Correct 2 Target pushed 3 Target pushed inward outward Figure 6 18 Examples of improper and correct sweep timing 1 Transmit on the shortest range and confirm that the GAIN and STC controls are properly adjusted 2 Visually select a target which forms straight line harbor wall straight pier 3 Select 10 Sweep Timing Adjustment on the installation setup menu and press the ACQ ENTER key The message appears Sweep Timing Adjustment Use omnipad to st
52. o the target as well as the bearing appears at the bottom right hand corner of the display By VRM 1 Press the EBL VRM SELECT key to circumscribe a VRM readout at the bottom center Each press of the key selects the readout of EBLI EBL2 VRMI or VRM2 in that order Zu EBL VRM 345 6 R 5 3 NM 23 0 R 12 5 NM Figure 2 7 Display bottom showing location of EBL and VRM readouts 2 Press the EBL VRM CONTROL key enable control of the VRM by the omnipad 3 Operate the omnipad to place the outside edge of the VRM on the inside edge of the target 4 Check the VRM readout at the bottom right hand corner of the display to find the range to the target 5 To erase the press and hold down the EBL VRM CONTROL key 19 20 To erase press and hold down the EBL VRM CONTROL key about two seconds Range 7796 0 NM Range ring 352 0 Interval Cursor range 40 30 2 Figure 2 8 Measuring range by the cursor range rings and VRM Note You can display the range readout of the VRM and cursor in nautical miles statute miles or kilometers For details see the next chapter 2 14 Measuring the Bearing There are two ways to measure the bearing to a target by the cursor and by the EBL Electronic Bearing Line By cursor Operate the omnipad to bisect the target with the cursor intersection The bearing to the target appears at the bottom of the di
53. obtained prudently 61 Operation of ARPA General The Auto Plotter permits manual or automatic acquisition and automatic tracking of up to 10 radar targets An internal microprocessor calculates target data such as speeds and courses and display the results in alphanumeric and by vectors To en sure the reliability of the displayed target data the radar must be properly adjust ed for minimum sea returns and noise Principal Specifications Acquisition and tracking e Acquisition of up to 10 targets between 0 2 and 16 nm e Automatic tracking of up to 10 acquired targets between 0 1 and 16 nm Vectors Vector length 30s 1 3 6 15 30 min Orientation True velocity or relative velocity Past positions 5 past positions at intervals of 15 30s 1 2 3 6 min Alarm Visual and audible alarms against targets violating CPA TCPA limits Visual alarm against lost targets Target discrimination A target measuring about 800 m or more in the radial or circumferential direction is regarded as a landmass and not acquired or tracked Echoes smaller than about 800 m are regarded as true targets Key Used Auto Plotter The Auto plotter utilizes the following touchpad keys Given below is a brief des cription of these keys MENU Display Eraese the main menu SELECT CANCEL Long press Terminates plotting of the target selected with the cursor Brief press Displays the data of target selected with the cursor ACQ ENTER Acquires the targe
54. onnect the 7 way plug to jack J801 on the MOD Board Secure the cable between CON 0906 and J801 with the cable tie as shown in Figure 6 13 MP Board Cable tie Fasten ground 2812 4811 Stay Figure 6 13 Antenna unit cover opened 51 6 Fasten the ground wire black of the signal cable to the chassis as shown in Figure 6 13 7 Loosely fasten the antenna housing cover You will tighten the fixing bolts after confirming magnetron heater voltage 6 2 Display Unit Installation Mounting considerations When selecting a mounting location for the display unit keep in mind the following points Even though the display unit is waterproof it is recommended that the display unit must be mounted inside an enchosed cabinet Provide adequate space behind and around the unit to permit circulation of air and to provide convenient access to the rear connectors Even though the picture is quite legible even in bright sunlight keep the display unit out of direct sunlight or at least shaded because of heat that can build up inside the cabinet Locate the display unit in a position where you can view and operate it conveniently but where there is no danger of salt or fresh water spray or immersion The orientation of the display unit should be so the radar screen is viewed while the operator is facing in the direction of the bow This makes determination of your position much easier Make sure you allow enough c
55. ors the predicted range at the Closest Point of Approach CPA and predicted time to CPA TCPA of each tracked target to own ship When the predicted CPA of any target becomes smaller than a preset CPA alarm range and its predicted TCPA less than a preset TCPA alarm limit the ARPA releases an audible alarm In addition the target plot symbol changes to a triangle and flashes together with its vector Provided that this feature is used correctly it will help prevent the risk of collision by alerting you to threatening targets It is important that GAIN A C SEA A C RAIN and other radar controls are properly adjusted and the Auto Plotter is set up so that it can track targets effectively CPA TCPA alarm ranges must be set up properly taking into consideration the size tonnage speed turning performance and other characteristics of own ship A WARNING The CPA TCPA alarm feature should never be relied upon as a sole means for detecting the risk of collision The navigator is not relieved of the responsibility to keep visual lookout for avoiding collisions whether or not the radar or other plotting aid is in use Follow the steps shown below to set the CPA TCPA alarm ranges Open the ARPA MENU On the CPA Set line select a CPA limit desired Off 0 5 1 2 3 5 6nm Press the ACQ ENTER key On TCPA Set line select TCPA limit desired 30s 1 2 3 4 5 6 12M Press the ACQ ENTER key Press the MENU key to
56. p but only half the time of travel is needed to determine the one way distance to the target This radar automatically takes this into account it making the range calculation 1 4 How Radar Determines Bearing The bearing to a target found by the radar is determined by the direction in which the radar scanner antenna is pointing when it emits an electronic pulse and then eceives a returning echo Each time the scanner rotates pulses are transmitted in the full 360 degree circle each pulse at a slightly differentbearing from the previous one Therefore if one knows the direction in whichthe signal is sent out one knows the direction from which the echo must return 1 5 Radar Wave Speed and Antenna Rotation Speed Note that the speed of the radar waves out to the target and back again as echoes is extremely fast compared to the speed of totation of the antenna By the time radar echoes have returned to the scanner the amount of scanner rotation after initial transmitting of the radar pulse is extremely small 1 6 The Radar Display The range and bearing of a target is displayed on what is called a Plan Position Indicator PPI This display is essentially a polar diagram with the transmitting ship s position at the center Images of target echoes are received and displayed at their relative bearings and at their distance from the PPI center With a continuous display of the images of targets the motion of the transmitting ship is also displ
57. p electrical interference avoid where possible routing the signal cable near other onboard electrical equipment Also avoid running the cable in parallel with power cables Pass the cable through the hole and apply sealing compound around the hole for waterproofing The procedure for connecting the signal cable to the antenna unit is as following 1 Through a pipe or waterproof cable grand fitted on the wheelhouse top or bulk head 2 Unfasten four screws at bottom of the scanner base to remove the cable gland assembly 3 Pass the signal cable through the antenna base and the cable gland assembly removed in step 2 4 4 10 CLAM PLATE RUBBER PACKING Figure 6 8 Passing the signal cable through the antenna housing 49 4 Fasten the cable gland assembly 5 Connect the lead wires to CON 0906 in the antenna housing by referring to the Interconnection Diagram Fasten the ground washer at the bottom of the antenna housing as shown in Figure 6 9 GROUND WIRE Fasten shield here CON 0906 Figure 6 9 Connection in the antenna housing Final preparation 1 Place the antenna housing cover on the housing Loosely fasten the four fixing bolts on the cover Scanner housing cover Figure 6 10 Fastening the antenna housing cover 2 Apply grease to the two slot pins Using a wooden hammer to prevent damage to paint insert slotted pins into the pinning holes until the pin head is flush w
58. perating properly 6 Press the ACQ key to check the display circuit The following pattern should ges 5 Figure 5 2 Test pattern 7 Press the MENU key to back to the selftest menu 8 To escape from the test Press the MENU key 5 5 Life Expectancy of Magnetron The following table shows the life expectancy of the magnetron Life expectancy MSF1421B 1338 000 MAF1421B V801 o KR 1668 14218 Table 5 3 Life expectancy of magnetron 43 6 INSTALLATION This chapter provides the procedures necessary for installation Installation mainly consists of the following sitting and mounting the display unit and antenna unit connection of the signal cable and the power cable establishing the ground checking the installation and adjustments 6 1 Antenna Unit Installation Sitting handling considerations The antenna unit is generally installed either on top of the wheelhouse or on the radar mast on a suitable platform Locate the antenna unit where there is a good all round view rigging intercepting the scanning beam Any obstruction will cause shadow and blind sectors A mast for instance with a diameter considerably less than the width of the radiator will cause only a small blind sector but a horizontal spreader or crosstrees in the same horizontal plane as the antenna unit would be a much more serious obstruction you would need to place the antenna unit well above or below it It is
59. pressing the GUARD key When this is done G ACKN replaces G This means the alarm is acknowledgrd Press the key again to reactivate the alarm Cancelling the guard zone and guard alarm Press and hold down the GUARD key until the guard zone disappears Notes on the guard alarm e The alarm is useful anti collision aid but does not relieve the operator of the responsibility to also keep a visual lookout for possible collision situations e When the radar range is less than one half of the guard zone range the guard zone disappears and G IN or OUT appears in inverse video If this happens raise to re display the guard zone A target echo does not always mean a landmass reef ships or surface objects but can imply returns from sea surface or precipitation As the level of these retu rns varies with environment the operator should properly adjust the A C SEA A C RAIN and GAIN to be sure the alarm system does not overlook target echoes 31 32 3 8 Watchman The watchman function periodically transmits the radar for minute to check for targets in a guard zone If it finds change in the zone from the previous transmis sion it sounds the radar continuously This feature is useful when you do not need the radar s function continuously but want to be alerted to radar targets in a speci fic area TX St by TX St by 5 10 or 20 A 1min 5 10 or 20 1 min min Watchman starts Figure 3 10 How watchman wo
60. r GPS LC 2 Depth Unit fa ft 3 Temp Unit F 4 Hdg Sensor Gyro 5 Key Beep Off 6 Ant on Tx Stop 7 Dead Sector 180 180 8 Tuned Video Auto Adjustment 9 Heading Alignment 10 Sweep Timing Adjustment 11 MBS Adjustment 12 Ant Height Low Hig 13 STC Curve Std 14 Slave 15 Hours in Use 000001 5H 16 Tx Hours 000000 0H Figure 6 15 Installation setup ment Adjusting tune video Do the following to adjust tune and video amplifier level input 1 Press the ST BY TX key to transmit A WARNING Before transmitting the radar make sure no one is near the antenna unit to prevent the potential risk of being struck by the rotation antenna and exposure to Therefore radiation hazard 2 On the Installation setup menu select 8 Tune Video Adjustment and press the ACQ ENTER key 3 The unit automatically adjusts displaying the following message Tune Video Auto Adjustment Now under correction Return to installation setup menu after the correction Figure 6 16 Auto Adjustment messages 4 When adjustment is completed the messages disappears 55 56 Entering antenna height The STC curve changes with respect to antenna height above the waterline Enter antenna height above the waterline to optimize the STC curve 1 Select 12 Antenna Height on the installation setup menu and press the ACQ ENTER key 2 Operate the omnipad to select antenna h
61. r vessel in afterglow vessel in afterglow This function is useful for alerting you to possible collision situations Starting echo trail 1 Press the MENU key to open the menu 2 Select ECHO TRAIL by the omnipad 3 Select ACTIVATE by pressing the ACQ ENTER key Figure 3 4 How the echo trail feature work TRAIL the echo trail time selected on OTHER MENU and elapsed time appear at the top right hand corner of the display Then afterglow starts extending from all target Note Trails are restarted when range or mode is changed or zoom or shift is turn ed on 27 Fixed time trail 1 When the elapsed time clock counts up to the trail time selected the elapsed time display freezes 2 The oldest portions of trails are erased so only the latest trail equal in length to the trail time selected is shown 3 Trail continues For example the one minute trail time is selected When the elapsed time clock counts up to 60 seconds the elapsed time clock counts up to 60 seconds the ela psed time display freezes at 60 but the latest one minute of trail are erased and then trail continuous Continuous trail The maximum continuous trail time is 99 minutes and 59 seconds When the ela psed time clock counts up to that time the elapsed time display is reset to zero and trail begins again Display is reset to zero and trail begins again Cancelling echo trail Select OFF deactivate at ECHO TRAIL on the menu Changing
62. rks How watchman works When the time selected for the watchman restperiod has elapsed the radar autom atically transmits for one minute to check the condition inside the guard zone If there is no change the radar goes into stand by WHTCHMAN appears during stand ny If there is change the radar sounds the audible alarm cancels the watc hman function and transmits continuously Turning on watchman Create a guard zone usually 360 degrees with the guard alarm function Press the MENU key Select OTHER MENU Press the ACQ ENTER key Select 15 Watchman Press the omnipad to select watchman rest period 5 minutes 10 minutes or 20 minutes 9 at the top of the screen the radar transmits for one mi nute to check for targets inside the guard zone And the the CRT shuts off and the radar goes into stand by Cancelling watchman Go into the OTHERS menu and set 15 Watchman for off Note 1 Watchman can be used without a guard zone Note 2 The alarm sounds just before the radar starts and stops transmitting 3 9 Displaying Navigation Data Navigation data can be displayed at the screen bottom if this radar receives navi gation input in IEC 1162 format Navigation data include position in latitude and longitude or Loran C time difference range bearing and time to go to both waypoint selected on the navigator and the cursor speed IL
63. s Shifts your vessel s 27 m BRILL Adjusts display brilliance Brief press Doubles size of a d 4 area between your vessel location selected by cursor N 51 Sets radar in stand by IX J transmits radar pulse Control Reduces rain clutter _ _ Switch _ Displaces the EBL origin rums power on off Lights when the economy mode is on Default switch function Figure 2 1 Control panel 11 2 2 Display Indication and Markers Echo trail elapsed time Heading requires heading data Tuning indicator Heading line Echo trail time Guard zone Zoom Range Echo Stretch Range ring interval Pulselength Display mode Off center Cursor EBL2 Guard zone EBL1 Range ring VRM1 VRM2 North mark A C AUTO EBL1 bearing EBL2 bearing 0 0 142 NM Interference rejector VRM1 range VRM2 range Cursor bearing Cursor range Figure 2 2 Display indications 12 2 3 Turning the Radar On Off Press the POWER key to turn the radar on or off The control panel lights and a timer displays the time remaining for warm up of the magnetron the device which produces radar pulses counting down from 1 30 to 0 01 2 4 Transmitting After the power is turned on and the magnetron has warmed up STAND BY appears at the screen center This means the radar is now fully operational In stand by
64. s at the top right hand corner when the Out alarm is selected Dashed line EONS I NS I E IN ALARM OUT ALARM Figure 3 8 In and Out alarm Setting a guard zone Preparation 1 Press the MENU key and the select OTHER MENU and pressing the ACQ ENTER key 2 Select 17 Guard Mode and In alarm on target entering zone or Out alarm on target exiting zone by operating the omnipad 3 Press the ACQ ENTER key 4 Press the MENU key to close the menu To set a guard zone 1 Mentally create the guard zone you want to set 2 Operate the onipad to set the cursor on point A or B Press the GUARD key G IN with asterisk blinking appears at the top right hand corner of the display See Figure 3 9 2 The asterisk indicates the guard zone is partially set 3 Operate the omnipad to set the cursor on point C or D See Figure 3 9 3 4 Press the GUARD key The asterisk disappears See Figure 3 9 4 Asterisk blinking Guard zone to set G CIN Drag cursor here 1 Mentally create the 2 Drag cursor to top left corner of guard zone to set zone and press GUARD 4 Guard zone completed 9 Drag cursor to bottom right corner of zone and press GUARD Figure 3 9 How to set the guard zone Silencing the audible alarm Any radar targets violating the guard zone will trigger the audible alarm You can silence the audible alarm by
65. splay By EBL 1 Press the ERL VRM LECT key to circumscribe an EBL readout at the b ottom left hand corner Eash press of the key selects the readout of EBL1 EBL2 VRMI in that order 2 Press the EBL VRM CONTROL key to enable control of the omnipad 3 Operate the omnipad to bisect the target with the EBL 4 Check the EBL readout at the bottom left hand corner of the display to find the hearing to the target 5 To anchor the EBL press the EBL VRM CONTROL key To erase the EBL and its readout press and hold down the EBL VRM CON TROL key about two seconds Bearing EBL EBL1 bearing 40 0 RJ EBL1 bearing 135 0 R 4007 R 4 0 NM Figure 2 9 How to measure bearing by EBL and cursor Note The bearing readout for the EBL and the cursor can be display in relative or true bearing true bearing requires heading sensor input For north up and c urse up display modes the bearing reference is always true For details see the next chapter Tips for measuring bearing Bearing measurements of smaller targets are more accurate the center of larger target pips is not as easily identified Bearings of stationary or slower moving targets are more accurate than Bearings of faster moving targets e To minimize bearing errors keep echoes in the outer half of the picture by changing the range scale angular difference becomes difficult to resolve as a target approaches the center of t
66. ss Steering Compass Display unit 0 75m 0 6m Antenna unit 1 0m 0 74m 3 Power supply amp power consumption 12V 24V 32VDC 10 5V to 40VDC 60W INTERFACE IEC 1162 0183 Input Own ship s position GGA gt RMA gt RMC gt GLL Speed RMA gt RMC gt VIG gt VHW Heading True HDT gt HDG gt HDT gt VHW gt VHW Course True RMA gt RMC gt VTG Course Magnetic VTG gt RMA gt RMC Waypoint Range Bearing RMB gt BWC gt BWR Loran time difference RMA gt GLC gt gt GTD Water depth DPT gt DBT Water temperature MDA gt MTW XTE RMB gt XTE gt APB Calculated value based Magnetic variation Output TLL On using TLL Key RSD An interval of four seconds TTM ARPA ARPA FUNCTION Require Heading Data Input 1 Acquisition Instant selection of auto or manual acquisition in 0 2 16nm relative speed 100KT 2 Tracking Automatic tracking of up to 10 acquired targets betwen 0 1 to 16 nm 3 Prediction of target motion True or relative vectors time scaled 4 Past position 10 past positions of tracked targets 5 Alarm Lost target CPA TCPA 6 Automatic tracking range 0 1 16nm 7 Target information one target selected e Distance and bearing from own ship to target e Moving direction and speed e CPA estimated Closest Time to CPA 8 Vector length 30 sec 30 min 9 Plotting interval 15 sec 6 min CONFIGERATION KR 1338 1668 ANTENNA UNIT 4 5 I dA
67. ssed On the other hand excessive sensitivity yields too much background noise strong targets may be missed because of the poor contrast between desired echoes and the background noise on the display To adjust receiver sensitivity transmit on long range and adjust the GAIN control so background noise is just visible on the screen 2 10 Adjusting the A C SEA Control reducing sea clutter Echoes from waves can be troublesome covering the central part of the display with random signals known as sea clutter The higher the waves and the higher the scanner above the water the further the clutter will extend Sea clutter appears on the display as many small echoes which might affect radar performance See the Figure 2 3 When sea clutter masks the picture adjust the A C SEA control to reduce the clutter How the A C SEA control works The A C SEA control reduces the amplification of echoes at short ranges where clutter is the greatest and progressively increases amplification will be normal at those ranges where there is no sea clutter 16 Adjusting the A C SEA control The proper setting of the A C SEA should be such that the clutter is broken up into small dots and small targets become distinguishable If the control is set Too low targets will be hidden in the clutter while if it is set too high both sea clutter and targets will disappear from the display In most cases adjust the con Rol until clutter has disappeared to lee
68. t selected with the cursor 62 The ARPA MENU operation includes the followings Display Turns on off the plot symbols past positions and target data All Cancel Cancels the tracking of all targets Vector Ref Selects relative vector or true vectors To select your choice open the ARPA menu and the legend Rel and True appear on the 3 Vector Ref line Operate the omnipad When your selection is in the reverse video press the ACQ ENTER key Vector Length Selects vector time History Selects past position plot interval CPA Set Selects CPA alarm limit When a target is predicted to come within this limit an aural alarm sounds and at the same time the corresponding target symbol changes to a blinking triangle Note If the preset CPA limit is set at OFF a target which is on collision course will not produce an alarm TCPA Set Selects TCPA alarm limit Auto ACQ Turns on off Auto Acquisition Area Activating the Auto plotter To activate the Auto Plotter follow the steps shown below Adjust the GAIN A C SEA and A C RAIN controls for proper radar picture Press the MENU key to open the main menu Operate the omnipad to select ARP 10 MENU Press the ACQ ENTER key The menu shown in Figure AP 1 appears Operate the omnipad to select the menu item 1 Display Operate the omnipad to select On Press the ACQ ENTER key Press the MENU key to close the
69. the fuse with the 5A fuse supplied to fuse holder 6 4 Checking the Installation After completing the installation it is a good idea to recheck it to be sure all steps were correctly done Use the table 6 1 to check the installation Tick box Table 6 1 The signal cable is securely retained against the mast or mounting platform and is free of interference from running rigging L The cable gland or entry on the deck if provided is waterproofed 0 The power connections to the battery are of correct polarity 0 The plugs at the rear of the display unit are tightly fastened LI The fuse in the power cable is 10A 12V or 5A 24V 32V DC 6 5 Adjustments This section covers adjustment of the radar after installation You will need to adjust tune video amplifier level input enter antenna height adjust tuning level adjust sweep timing adjust main bang suppression setting a blanking area and confirm magnetron heater voltage These adjustment are done through the radar install menus Preparation 1 Turn off the radar While pressing and holding down the GAIN control at least three seconds press the POWER key 2 Press the MENU key and select OTHERS by using the omnipad and pressing ACQ ENTER key 3 Select 24 Installation setup 4 Press the ACQ ENTER key to open the installation setup menu 54 Installation Setup Select item by omnipad and ress ENTER key II Nav Talke
70. the radome base to the mounting platform Wiring and final preparation 4 Drill a hole of at least 20 millimeters diameter through the deck or bulkhead to run the signal cable between the antenna unit and display unit To prevent electrical interference avoid running the signal cable near other electrical equipment and in parallel with power cables Pass the cable through the hole Then seal the hole with sealing compound for waterproofing Remove the shield cover in the radome Remove the cable clamping plate by unfastening four screws and removing a gasket Pass the cable through the hole at the bottom of the radome base Secure the cable with the cable clamping plate and gasket Ground the shield and vinyl wire by one of the screws of the cable clamping plate and one of the screws of the IF amplifier chassis respectively c c C Motor 10711 Connect the wire to the RF unit 1 9 pin connector to J801 2 4 pin connector to J802 3 13 pin connector to J611 Figure 6 4 Location of J801 J802 J611 47 11 Fix the shield cover Do not pinch the cable 12 Loosely fasten the radome fixing bolts You will tighten them after confirming magnetron heater voltage Mounting KR 1668 Figure 6 5 Typical antenna unit mounting locations 1 Drill four fixing bolt holes 13 millimeters dia One cable entry hole approx 50 millimeters dia In the mounting platform See the outli
71. trail attributes Trail gradation and trail time can be selected on the OTHERS menu Trails canbe shown in single or multiple gradations Multiple paints trails getting thinner with Trail Tone time just like the afterglow an analog PPI radar Single Multiple Trail time can be set for 15 sec Trail Time 30 1 min 3 min 6min 15min 30 min or continuous Table 3 5 Trailing attributes 3 5 Suppressing Radar Interference Radar interference may occur when near another shipborne radar operating in the same frequency hand as you radar Its on sereen appearance is many bright dots either scattered at random or in the form of dotted lines extending from the center to the edge of the display Figure 3 6 illustrates interference in the from of curved spokes Interference effects are distinguishable from normal echoes because they do not appear in the same place on successive rotations of the antenna 28 Figure 3 6 Radar interference Four levels of interference are available including off IRI1 IR2 IR3 and OFF IR3 provides the highest level of rejection 1 Press the MENU key 2 Select OTHER MENU and press the ACQ ENTER key 3 Select 6 Int Reject 4 Select level desired by operation the omnipad 5 Press the ACQ ENTER key 6 Press the MENU key to close the menu OTHERS select item by omnipad and press ENTER key BW Panel Dimmer 2 Mark brill 3 HD Mark 4 Characters 5
72. ward but a little is still visible windward 1 Confirm that the sensitivity is properly adjusted and then transmit on short range 2 Adjust the A C SEA control so small targets are distinguishable but some clutter remains on the display Sea clutter at A C SEA control adjusted display center sea clutter suppressed Figure 2 4 How to adjust the STC control Tip for adjusting the A C SEA A common mistake is to over adjust the circuit so all the clutter is removed As an example set up for maximum STC You will see how the center of the display becomes dark This dark zone can be dangerous targets may be missed especially if the sensitivity 18 not properly adjusted Always leave a little clutter visible on the display to be sure weak echoes will not be suppressed If there is no clutter visible on the display turn off the circuit 17 2 11 Apply the A C RAIN reducing rain clutter The vertical beamwidth of the antenna is designed to see surface targets even when the ship is rolling However by this design the unit will also detect rain clutter rain snow hail etc in the same manner as normal targets Figure 2 4 Shows the appearance of rain clutter on the Display Adjusting A C RAIN When rain clutter masks echoes adjust the A C RAIN Control This control spl its up these unwanted echoes into a speckled pattem making recognition of soild targets easier Appearance of rain clutter A C RAIN control adjusted rain

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