Furuno FR-7041R-MARK-2 Operator'S Manual Download

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MARINE RADAR

FR-7041R-MARK-2

Summary of Contents for FR-7041R-MARK-2

Page 1: ...MARINE RADAR FR 7041R MARK 2 ...

Page 2: ... har a c ho Ni s hi nom i y a J apan Telephone 0798 65 2111 Telefax 0798 65 4200 Your Local Agent Dealer All rights reserved PUB No OME 34920 FR 7041R MARK 2 YOSH FIRST EDITION SEP 2000 B NOV 7 2000 Printed in Japan ...

Page 3: ...exist are given in the table below Note If the antenna unit is installed at a close distance in front of the wheel house your administration may require halt of transmission within a certain sector of antenna revolution This is possible Ask your FURUNO representative or dealer to provide this feature Radiator type Distance to 100 W m2 point Distance to 10 W m2 point XN 12A 4 Nil FR 7041R MARK 2 X ...

Page 4: ... or electrical shock WARNING Use the proper fuse Fuse rating is shown on the equipment Use of a wrong fuse can result in equipment damage Keep heater away from equipment Heat can alter equipment shape and melt the power cord which 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 equi...

Page 5: ...ative bearing 1 18 1 19 Collision Assessment by the Offset EBL 1 19 1 20 Measuring Range and Bearing Between Two Targets 1 20 1 21 Shifting the Picture 1 21 1 22 Zoom 1 22 1 23 Guard Alarm 1 23 1 23 1 Selection of guard zone type 1 23 1 23 2 Setting the guard zone 1 24 1 23 3 Silencing the aural alarm 1 24 1 23 4 Canceling the guard zone and guard alarm 1 25 1 23 5 Guard alarm sensitivity 1 25 1 2...

Page 6: ...2 3 2 2 3 Virtual image 2 4 2 2 4 Shadow sectors 2 4 2 3 SART Search and Rescue Transponder 2 5 2 3 1 General procedure for detecting SART response 2 6 2 3 2 General remarks on receiving SART 2 6 2 4 Racon Radar Beacon 2 8 3 MAINTENANCE TROUBLESHOOTING 3 1 Maintenance Program 3 2 3 2 Replacing the Fuse 3 2 3 3 Troubleshooting 3 3 3 3 1 Easy troubleshooting 3 3 3 3 2 Advanced troubleshooting 3 4 3 ...

Page 7: ...ation and maintenance procedures set forth in this manual We would appreciate feedback from you the end user about whether we are achieving our purposes Thank you for considering and purchasing FURUNO Features The FR 7041R MARK 2 has a large variety of functions all contained in a rugged case All controls respond immediately to the operator s command and each time a key is pressed the correspondin...

Page 8: ...r control of range transmission standby and off centering Target latitude and longitude position can be output to external equipment Transmission can be prevented in a specific area Ask you serviceman about this feature Conforms to IEC 60936 Shipborne radar performance requirements IEC 61162 1 Marine navigation and radiocommunication equipment and systems Digital interfaces Part 1 Single talker an...

Page 9: ...nit RDP 136 RU 3423 100 110 115 220 230 VAC 1φ 50 60 Hz 12 24 32 VDC Broken lines denote optional equipment Rectifier Heading Sensor Navigator Echo Sounder External Buzzer OP03 173 Remote Controller RCU 009 Remote Display FMD 811 Heading Sensor Navigator Echo Sounder ...

Page 10: ...and bearing between two targets predicts collision course Opens closes menu Displays target movement in afterglow TLL VRM 2 EBL 2 Turns respective EBL on off Selects presentation mode Turns respective VRM on off Trackball 1 Shifts cursor EBL and VRM 2 Sets guard zone 3 Selects items and options from menus Registers selection on menus Switches unit of measurement for VRM and cursor Outputs cursor p...

Page 11: ... The remote controller provides control of offcenter standby transmit and range functions OFF CENTER RANGE ST BY TX Sweep center moves to stern direction 30 offcenter Toggles standby transmit Selects radar range Figure 1 2 Remote controller ...

Page 12: ...and 30 second standby If the power switch has been turned off by mistake and you want to restart the radar promptly do the following 1 Press the POWER switch not later than five seconds after power off 2 After ST BY appears press the STBY TX key The radar is restored to full operation 1 3 Transmitting After the power is turned on and the magnetron has warmed up ST BY Stand By appears at the screen...

Page 13: ...rference rejector VRM2 range VRM1 range Cursor range Cursor bearing EBL2 bearing EBL1 bearing VRM1 EBL1 Guard zone area Cursor Presentation mode Range ring interval Range Echo trail elapsed time Heading requires heading data Heading marker Noise rejector Second trace echo rejector Parallel Index lines Tuning bar FTC Automatic rain clutter suppressor Pulselength Figure 1 3 Indications and markers 1...

Page 14: ...selength 7 Noise Reject 8 Trail Time 9 Tune 10 WPT Mark 11 EBL Ref 12 VRM Unit 13 Watchman 14 STBY Disp 15 Guard Mode 16 Own Position 17 Cursor Posi 18 Alm Sense LV 19 Dead Sector 20 Range 21 2nd Echo Rej 22 Test 23 Installation Setup 4 4 4 4 20min 1 1 1 1 Single Short Off 15sec Auto Off Rel nm Off Norm In L L R B Low Off 1 8 1 4 Off 2 2 2 2 Multi Long On 30sec Manual On True km 5min Econo Out TD ...

Page 15: ...ss the MENU key to display the main menu 2 Use the trackball to select OTHER MENU and press the ENTER key 3 Use the trackball to select the item 9 Tune 4 Select the option Manual followed by the ENTER key 5 While pressing and holding down the GAIN control operate the trackball to show the longest tuning bar possible 6 Press the MENU key to close the menu 1 8 Selecting a Range The range selected au...

Page 16: ... 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 Adjust the sensitivity on the highest range the background noise is clearer on that range If you set up for too little sensitivity weak echoes may be missed On the other hand excessive sensitivity yields...

Page 17: ...ittle 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 display center A C SEA control adjusted sea clutter suppressed Figure 1 7 Sea clutter Tip for adjustment the A C SEA A common mistake is to over adjust the circui...

Page 18: ... the FTC circuit This circuit splits up unwanted echoes into a speckled pattern to distinguish solid targets from the clutter FTC appears at the bottom left corner of the screen when the FTC circuit is active Turn off the FTC when its use is not required so that weak echoes will not be missed Appearance of rain clutter A C RAIN control adjusted rain clutter suppressed Figure 1 8 Rain clutter 1 13 ...

Page 19: ...isappear and the HDG readout to show xxx x After restoring the heading signal press the MODE key to display the heading Heading marker North marker North up Mode NUP RM In the north up mode target pips are painted at their measured distances and in their true heading sensor directions from own ship north being maintained up of the screen The heading marker changes its direction according to the sh...

Page 20: ... in accord ance with their true courses and speeds In ground stablized TM all fixed targets such as landmasses appear as stationary echoes In the sea stablized TM without set and drift input the landmass can move on the screen When own ship reaches a point corresponding to 75 of the radius of the display the own ship is automatically reset to a point of 50 radius opposite to the extension of the h...

Page 21: ...NGS Item currently selected is highlighted Figure 1 10 Main menu 2 Use the trackball to select item desired For example select RINGS 3 Press the ENTER key to display option message desired Each pressing of the ENTER key changes the message at the bottom of the menu window The message sequence for RINGS is as below Change brill from Off to 1 Change brill from 1 to 2 Change brill from 2 to 3 Change ...

Page 22: ...press the ENTER key OTHERS Select item by T ball and press ENTER key 1 Panel Dimmer 2 Mark Brill 3 HD Mark 4 Characters 5 Trail Tone 6 Pulselength 7 Noise Reject 8 Trail Time 9 Tune 10 WPT Mark 11 EBL Ref 12 VRM Unit 13 Watchman 14 STBY Disp 15 Guard Mode 16 Own Position 17 Cursor Posi 18 Alm Sense LV 19 Dead Sector 20 Range 21 2nd Echo Rej 22 Test 23 Installation Setup 4 4 4 4 20min 1 1 1 1 Singl...

Page 23: ... Selects unit of range measurement for VRM nm km and sm 13 Watchman Selects watchman standby period 14 STBY Disp Selects function to use in standby display STBY go into economy mode or display nav data 15 Guard Mode Chooses how the guard alarm is triggered by targets entering In or exiting Out the guard zone 16 Own Position Chooses how to display own ship position L L or Loran TD Connected navigat...

Page 24: ...key to display the menu 2 Use the trackball to select INT REJECT 3 Press the ENTER key to choose level of suppression desired The inter ference rejection level indication at the bottom right corner of the display changes cyclically in the sequence of OFF IR1 IR2 and IR3 IR3 provides the highest level of interference rejection 4 Press the MENU key to close the menu 1 16 Erasing the Heading Marker T...

Page 25: ...gs between the center of the display and the target Check the range ring interval and judge the distance of the echo from the inner edge of the nearest ring 1 17 2 Measuring range by cursor To measure the range by the cursor rotate the trackball to place the cursor intersection on the inside edge of the target The range to the cursor intersection appears at the bottom of the display 1 17 3 Measuri...

Page 26: ...ring scale rough estimate by the cursor and by the EBL Electronic Bearing Line 1 18 1 Measuring bearing by the cursor Rotate the trackball to set the cursor intersection on the center of the target The bearing to the cursor intersection appears at the bottom of the display 1 18 2 Measuring bearing by the EBL Use the EBLs for accurate measurement of the range to a target There are two EBLs EBL1 and...

Page 27: ...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 the display 1 18 3 Displaying true or relative bearing The bearing readout for the EBL can be referenced to ship s heading relative or North true with 11 EBL Ref on the OTHERS menu R for Relative or T or M for True appears to the right of the bear...

Page 28: ...rn on EBL1 3 Press the EBL OFFSET key EBL1 s origin shifts to cursor location 4 After several minutes press the EBL 1 key again 5 Operate the trackball to pass EBL1 s origin through the center of the display If the target tracks along EBL1 towards the center of the display your vessel s position it may be on a collision course with own vessel Offset EBL EBL1 6 0 KM 2 0 EBL1 origin initial position...

Page 29: ... the EBL 1 key again 5 Operate the trackball to bisect target B with EBL1 Check the EBL1 readout to find the bearing between target A and target B 6 Press the VRM 1 key Operate the trackball to place the outside edge of VRM1 on the inside edge of target B Check the VRM1 readout to find the range between target A and target B EBL1 90 0 R 0 37KM VRM 0 50KM VRM1 A B Range from target A to B Range bet...

Page 30: ... release action OFFCENTER appears at the top right corner of the display when the picture is shifted Cursor Place cursor where desired Press SHIFT ZOOM key with a touch and release action OFFCENTER Effective radius Figure 1 19 Shifting the picture Canceling shifted picture Press the OFF CENTER key again to erase the indication OFFCENTER Note The offcenter control on the remote controller shifts th...

Page 31: ...area of interest without changing the range 1 Select location with the cursor within effective radius 2 Press and hold down the SHIFT ZOOM key to show ZOOM blinking at the top right corner of the screen Cursor Cursor Place cursor where desired Press SHIFT ZOOM key to zoom ZOOM Figure 1 20 Zoom function Canceling zoom Press the SHIFT ZOOM key again to erase the indication ZOOM ...

Page 32: ...of guard zone type The guard alarm can sound against a target either entering or exiting the guard zone 1 Press the MENU key to display the main menu 2 Select OTHER MENU and press the ENTER key 3 Use the trackball to select 15 Guard Mode followed by desired alarm type In or Out 4 Press the ENTER key followed by the MENU key to conclude your selection and close the menu Inward alarm The alarm sound...

Page 33: ...D ALARM key The asterisk disappears See Figure 1 22 4 Guard zone to set G IN 2 Drag cursor to top left corner of zone and press GUARD ALARM Asterisk blinking Drag cursor here 1 Mentally create the guard zone to set G IN 3 Drag cursor to bottom right corner of zone and press GUARD ALARM 4 Guard zone completed G IN Guard zone Drag cursor here Figure 1 22 How to set the guard zone 1 23 3 Silencing th...

Page 34: ...ty to also keep a visual lookout for possible collision situations The alarm should not be relied upon as the sole means for detecting possible collision situations When the radar range is less than one half of the guard zone range the guard zone disappears and G IN or G OUT appears in reverse video If this happens raise the range to re display the guard zone A target echo does not always mean a l...

Page 35: ...ts extending from all targets When the elapsed time clock counts up to the trail time selected the elapsed time display freezes Then the oldest portions of trails are erased so only the latest trail equal in length to the trail time selected is shown This continues until echo trail is cancelled For example the one minute trail time is selected When the elapsed time clock counts up to 60 seconds th...

Page 36: ...are compensated by the radar s internal circuitry The echo stretch function magnifies these small blips in all ranges to make them easier to see Two types of echo stretch are available ES1 which stretches echoes in bearing direction and ES2 which stretches them in range and bearing directions Press the A C SEA ES PUSH control to select desired echo stretch Each press changes the echo stretch funct...

Page 37: ... watchman works 1 27 1 Turning on watchman 1 Create a guard zone usually 360 degrees with the guard alarm function 2 Press the MENU key 3 Select OTHER MENU and press the ENTER key 4 Use the trackball to select 13 Watchman followed by watchman standby period among 5 min 10 min and 20 min 5 Press the ENTER key 6 Press the MENU key to close the menu WATCHMAN appears at the top of the screen The radar...

Page 38: ...1 or F2 key whichever you want to program The following display appears SETTING FOR F1 KEY u Sel by T Ball press ENT u DISP DATA NOISE REJECT PULSE LENGTH TUNE A M INDEX LINE WATCH MAN EBL REF GUARD IN OUT WPT MARK DEAD SECTOR OTHER MENU RINGS NO FNCTN TRAIL TIME ALARM LEVEL PANEL DIMMER VRM UNIT INT REJECT Press MENU key to escape TRAIL TONE MARK BRILL CHARA CTERS OWN POSITN CURSOR POSITN STBY DI...

Page 39: ...1 Turning navigation data on off 1 Press the MENU key to show the main menu 2 Select DISP DATA with the trackball 3 Press the ENTER key to turn nav data on or off as appropriate HDG 234 5 SP HU 125KM 0625 G OUT VRM 0 048KM 0 100KM 13 5 R 0 142KM EBL 345 6 R 23 0 R Waypoint mark Navigation Data OWN SHIP 34 56 12N 135 34 56E SPD 35 0KT WAYPOINT 0 09 NM 50 0 M TTG 00 20 CURSOR 34 29 98N 136 35 77E TT...

Page 40: ...H TEMPERATURE 10 5 kt 125 m ST BY 000 3 nm 17 3 C HDG 092 5 WPT TTG 01 08 BRG RNG 45 0 M 12 0NM OWN SHIP LAT 30 00 00N LON 135 00 00E XTE R 0 3NM E S W L R XTE XTE Standby or Timer Trip distance since power on Speed Depth TO Waypoint bearing Course Heading Time to go to TO Waypoint Range to TO Waypoint Ship s position in latitude and longitude and Loran TDs Cross Track Error shows direction and am...

Page 41: ...p and a coastline or partner ship They can be rotated by EBL2 and their width changed by VRM2 The number of lines shown depends on the range in use and width between parallel index lines EBL PI XXX X R 220 0 R VRM X XXXKM 0 025KM Figure 1 30 Parallel index lines 1 32 Economy Mode The CRT can be set to automatically turn itself off when in standby to reduce power consumption This feature is called ...

Page 42: ...e transmission cycle later namely after a next radar pulse has been transmitted You can suppress this type of echo as follows 1 Press the MENU key to show the main menu 2 Select OTHER MENU and press the ENTER key 3 Choose 21 2nd Echo Rej followed by On or Off as appropriate and press the ENTER key 2nd ECHO appears at the top of the display when turned on 4 Press the MENU key to close the menu Seco...

Page 43: ...ct OTHER MENU and press the ENTER key 3 Choose 20 Range and press the ENTER key The underline cursor appears beneath 1 8 Active ranges are highlighted 4 Select ranges to use or deselect and press the ENTER key 5 Press the MENU key to close the menu Note Ranges smaller than 1 km are shown as fractions in the OTHER menu and in decimal format on the radar display Menu Display 1 8 1 4 1 2 3 4 Radar Pi...

Page 44: ... is Off 1 Press the MENU key to show the main menu 2 Select OTHER MENU and press the ENTER key 3 Choose 19 Dead Sector and On or Off as appropriate 4 Press the ENTER key followed by the MENU key to close the menu 5 Press the MENU key to close the menu Dead sector Figure 1 32 Dead sector Note Instructions for how to set a dead sector are contained in the installation manual ...

Page 45: ... the radar Rmax varies considerably depending on several factors such as the height of the antenna above the waterline the height of the target above the sea the size shape and material of the target and the atmospheric conditions Under normal atmospheric conditions the maximum range is equal to the radar horizon or a little shorter The radar horizon is longer than the optical one by about 6 becau...

Page 46: ...ulselength only Practically a 0 08 microsecond pulse offers the discrimination better than 35 m as do so with all FURUNO radars Test targets for determining the range and bearing resolution are radar reflectors having an echoing area of 10 m2 2 1 3 Bearing accuracy One of the most important features of the radar is how accurately the bearing of a target can be measured The accuracy of bearing meas...

Page 47: ...t as shown below Multiple reflection echoes can be reduced and often removed by decreasing the gain sensitivity or properly adjusting the A C SEA control Own ship Target True echo Multiple echo Figure 2 2 Multiple echoes 2 2 2 Sidelobe echoes Every time the radar pulse is transmitted some radiation escapes on each side of the beam called sidelobes If a target exists where it can be detected by the...

Page 48: ...ure below If your ship comes close to a large metal bridge for example such a false echo may temporarily be seen on the screen True echo False echo Own ship Target ship Mirror image of target ship Figure 2 4 Virtual image 2 2 4 Shadow sectors Funnels stacks masts or derricks in the path of the antenna block the radar beam If the angle subtended at the antenna is more than a few degrees a non detec...

Page 49: ...within the pass band of the radar receiver If the SART is within range the frequency match during each of the 12 slow sweeps will produce a response on the radar display thus a line of 12 dots equally spaced by about 0 64 nautical miles will be shown When the range to the SART is reduced to about 1 nm the radar display may show also the 12 responses generated during the fast sweeps These additiona...

Page 50: ... normally matched to the radar pulselength and is usually switched with the range scale and the associated pulselength Narrow bandwidths of 3 5 MHz are used with long pulses on long range and wide bandwidths of 10 25 MHz with short pulses on short ranges Any radar bandwidth of less than 5 MHz will attenuate the SART signal slightly so it is preferable to use a medium bandwidth to ensure optimum de...

Page 51: ...own ship Some sets have automatic manual anti clutter sea control facilities in which case the operator should switch to manual A C RAIN control This should be used normally to break up areas of rain when trying to detect a SART response which being a series of dots is not affected by the action of the anti clutter rain circuitry Note that Racon responses which are often in the form of a long flas...

Page 52: ...itted on the same frequency as that of the triggering radar in which case it is superimposed on the ship s radar display automatically The racon signal appears on the PPI as a radial line originating at a point just beyond the position of the radar beacon or as a Morse code signal see figure below displayed radially from just beyond the beacon Racon Figure 2 9 Appearance of racon signal on the rad...

Page 53: ...ent Only qualified personnel should work inside the equipment Turn off the radar power switch before servicing the antenna unit Post a warn ing sign near the switch indicating it should not be turned on while the antenna unit is being serviced Prevent the potential risk of being struck by the rotating antenna and exposure to RF radiation hazard Wear a safety belt and hard hat when working on the a...

Page 54: ... If a crack is found apply a slight amount of sealing compound or adhesive as a temporary remedy then call for repair Do not use solvents such as benzine and acetone for cleaning If you need to remove ice from the antenna unit use a wooden hammer or rubber mallet Crack on the antenna unit may allow water to leak inside causing serious damage to circuitry 3 to 6 months CRT The CRT will in time accu...

Page 55: ... on the OTHER menu battery may have discharged check fuse you pressed the POWER key to turn on the radar nothing appears on the display try adjusting the brilliance with the BRILL control the antenna does not rotate the problem may be in the antenna unit Request service the radar has warmed up and you pressed the STBY TX key to transmit characters and indications are abnormal have a qualified tech...

Page 56: ...and 2 terminals of J1301 on the POWER board 12 V set 10 2 to 20 3 V 24 32 V set 20 4 to 41 6 V nothing appears on the display Brilliance setting CRT CRT voltage CRT board Check CRT heater If lit CRT is normal On the CRT board adjust CONTRAST pot VR101 and BRIGHTNESS pot VR204 WARNING A residual charge remains in capacitors and other devices several minutes after turning off the power Therefore wai...

Page 57: ...trigger line of signal cable Measure magnetron heater voltage Modulator circuit How to measure magnetron heater voltage 1 Turn on the radar and leave it in stand by 2 Open the antenna cover 3 Unfasten screws to remove the RTB cover 4 Connect a multimeter set to 10 VDC range between test point J825 4 and J825 6 GND on the RTB Board 03P9249 5 Confirm the meter reads 7 6 V 0 1V 6 Close the RTB cover ...

Page 58: ...Tx hours 0359167 0xx OK OK 000006 9H 000001 1H Press MENU for OTHER menu ROM RAM check OK or NG No Good Hours radar powered transmitted Program version no xx version no Rectangle fills when corresponding key is operated Figure 3 1 Test display 4 The rectangles at the right side of the screen are for checking the keys Operate a key and its corresponding rectangle fills if the key is normal 5 At the...

Page 59: ...enu Figure 3 2 Test pattern 7 To quit the test press the MENU key 3 5 Replacement of Magnetron When the magnetron has deteriorated the number of targets displayed decreases If you feel long range performance has decreased contact a FURUNO agent or dealer about replacement of the magnetron Table 3 4 Magnetron ordering information Magnetron Code no MG5248 000 116 121 E3571A E3571 000 143 883 ...

Page 60: ...L Ref Rel True VRM Unit nm km sm Watchman Off 5min 10min 20min STBY Disp Norm Econo Nav Guard Mode In Out Own Position L L TD Cursor Posi R B L L Alm Sense LV Low Med High Dead Sector Off On Range 1 8 1 4 1 2 3 4 1 1 5 2 3 4 6 8 12 16 24 32 2nd Echo Rej Off On Test Diagnostics Installation Setup For the installer RINGS Off 1 2 3 max INDEX LINE Off On DISP DATA Off On INT REJECT Off 1 2 3 OTHERS ME...

Page 61: ...30 MHz 3 Peak output power 4 kW nominal 4 Pulselength and pulse repetition rate 0 06 µs 2100 Hz 0 125 0 25 0 5 0 75 1 1 5 2 3 km 0 3 µs 1200 Hz 3 4 6 km 0 8 µs 600 Hz 6 8 12 16 24 32 km 5 Warm up time 1 30 6 Modulator switching method FET 7 IF Amplifier 60 MHz 8 Tuning Automatic or manual 9 Receiver front end MIC Microwave IC 10 Bandwidth 25 MHz TX pulselength 0 3 µs and 0 08 µs 3 MHz TX pulseleng...

Page 62: ... Radar alarm G IN G OUT G ACKN Echo stretch ES1 ES2 Range and Bearing to Cursor Echo trailing TRAIL Trail time Trial elapsed time Navigation data navigation input requires Heading HDG heading sensor input required 11 Vibration Vibration freq Hz Total amplitude mm 5 to 12 5 1 6 12 to 25 0 35 25 to 50 0 10 4 INTERFACE IEC 61162 1 NMEA0183 1 Input Own ship s Position GGA RMA RMC GLL Speed RMA RMC VTG...

Page 63: ...e controller IPX4 6 POWER SUPPLY CONSUMPTION 1 Power supply consumption 12 32 VDC 6 7 2 5 A 80 W approx 2 Protection features Protection against reverse polarity over voltage over current 7 COATING COLOR NO CHANGED 1 Antenna unit Munsell N9 5 2 Display unit Panel Munsell N3 0 Chassis Munsell 2 5GY5 1 5 8 COMPASS SAFE DISTANCE 1 Display Unit 1 10 m Standard 0 80 m Steering 2 Antenna Unit 1 00 m Sta...

Page 64: ...e 1 32 F F1 F2 keys 1 29 FTC control 1 9 Function keys F1 F2 1 29 Fuse replacement 3 2 G GAIN control 1 7 Guard alarm sensitivity 1 25 setting 1 24 silencing 1 24 type 1 23 GUARD ALARM key 1 24 H Heading marker 1 15 I Indications 1 4 Interference rejector 1 15 M Magnetron replacement 3 7 Main menu 1 12 Maintenance fuse replacement 3 2 maintenance program 3 2 Markers 1 4 MENU key 1 12 Menu overview...

Page 65: ...M cursor 1 17 RANGE key 1 6 Range rings 1 16 Remote controller 1 2 S SART 2 5 Second trace echoes 1 33 Shadow sectors 2 4 SHIFT ZOOM key 1 21 1 22 Sidelobe echoes 2 3 STBY TX key 1 3 System configuration vii T TLL key 1 25 Troubleshooting advanced 3 4 easy 3 3 Tuning 1 6 V Virtual image 2 4 VRM 1 VRM 2 keys 1 16 W Watchman 1 28 Waypoint mark 1 31 Z Zoom 1 22 ...

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