Furuno 1761 MARK-3 Operator's Manual
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Furuno 1761 MARK-3 Operator's Manual

Furuno 1761 MARK-3 Operator's Manual

Furuno marine radar operator's manual model 1761 mark-3
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Summary of Contents for Furuno 1761 MARK-3

  • Page 2 9 - 5 2 , A s h i h a r a - c h o , N i s h i n o m i y a , J a p a n T e l e p h o n e : 0 7 9 8 - 6 5 - 2 1 1 1 T e l e f a x : 0 7 9 8 - 6 5 - 4 2 0 0...

  • Page 3: Safety Instructions

    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.
  • Page 4 Two warning labels are attached to the display unit and scanner unit. Do not remove these labels. If labels are peeling off or are illegible, contact a FURUNO agent or dealer. <Display Unit> Name: Warning Label (1) To avoid electrical shock, do not remove cover.

  • Page 5: Foreword

    Congratulations on your choice of the FURUNO MODEL 1761 MARK-3 Marine Ra- dar. We are confident you will see why the FURUNO name has become synonymous with quality and reliability. For over 50 years FURUNO Electric Com- pany has enjoyed an enviable reputation for innovative and dependable marine electron- ics equipment.

  • Page 6: Table Of Contents

    FOREWORD ... iii MENU TREE ... v TABLE OF CONTENTS BY INDICATION, MARKER ... vi SYSTEM CONFIGURATION... vii 1. PRINCIPLE OF OPERATION 1.1 What is Radar? ... 1-1 1.2 How Ships Determined Position Before Radar ... 1-1 1.3 How Radar Determines Range ... 1-1 1.4 How Radar Determines Bearing ...

  • Page 7: Menu Tree

    MENU TREE MENU KEY 1. ECHO STRETCH (ON, OFF) 2. I. REJECT (OFF, ON) 3. PANEL DIMMER (0, 1, 2, 3, 4) 4. PLOT INTVL (CONT, 30S, 1M, 3M, 6M) 5. PLOT BRILL (LOW, HIGH) 6. RANGE (NM) set with (RING) (1/4, 1/2, 3/4, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48) 7.

  • Page 8: Table Of Contents By Indication, Marker

    MAG (or GYRO) BEARING (option) Heading marker (P.2-4) Range (P.2-2) Range ring interval (P.2-2) SHIFT Shift (or Zoom) (P.2-6) Watchman (P.2-10) Guard zone (P.2-9) Cursor (P.2-5, 6) EBL1 bearing (P.2-6) 45.6 R TABLE OF CONTENTS BY INDICATION, MARKER Plotting (P.2-11) MAG 115.0 ¡...

  • Page 9: Scanner Unit

    Navigation IEC 61162* (In/Out) device Gyro- Gyro Converter compass AD-100 Intergrated Heading Sensor PG-1000 *Equivalent to NMEA 0183 Option SYSTEM CONFIGURATION Scanner Unit Display Unit RDP-099 12 VDC: 24/32 VDC: 5A 12/24/32 VDC XN10A-RSB-0070-065 External Alarm Buzzer OP03-21 Rectifier RU-3423 115/230 VAC...

  • Page 10: Principle Of Operation

    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 dur- ing World War II, echoes as an aid to naviga- tion is not a new development. 1.2 How Ships Determined Position Before Radar Before the invention of radar, when running...
  • Page 11 Own ship (radar) (A) Bird's eye view of situation Targets (B) Radar picture of (A) Figure 1-1 How radar works Heading marker Range and bearing of a target, relative to own ship, are readable on the PPI. Own ship in center...

  • Page 12: Operation

    2.1 Control Description Turns power on. Press together with [STBY/TX] key to turn power off. Alternates between stand-by and transmit. Lights (in green) to show the radar is in the "echonomy (stand-by)" mode. Adjusts the brightness of the screen. Selects radar range. The "+"...

  • Page 13: Turning The Radar On/Off

    2.2 Turning the Radar On/Off After confirming there are no crew near the scanner unit, press the [POWER] key to turn on the power. The front panel will light up. The magnetron takes about two minutes and thirty seconds to warm up before the radar can be oper- ated.

  • Page 14: Adjusting The A/C Sea Control (Reducing Sea Clutter)

    echoes and the background noise on the dis- play. To adjust receiver sensitivity, transmit on long range, and adjust the [GAIN] control so back- ground noise is just visible on the screen. Tips on adjusting GAIN • In certain circumstances it may be useful to reduce the gain slightly to improve range resolution, clear up the picture, or reduce clutter caused by rain or snow.

  • Page 15: Adjusting The A/C Rain Control (Reducing Rain Clutter)

    2.9 Adjusting the A/C RAIN Control (reducing rain clutter) The vertical beamwidth of the antenna is de- signed 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 tar- gets.

  • Page 16: Select The Cursor Data Display

    2.13 Select the Cursor Data Display When connecting with NAV (IEC61162 for- mat) and gyro converter (IEC61162 or AD- 10 format), this radar can show the cursor position by Latitude/longitude at bottom of screen. Each time pressing [HM OFF] key, the data will change from Range/Bearing to Latitude/ longitude and vice versa.

  • Page 17: Shifting And Zooming The Display

    2. Position the EBL so it bisects the target by operating the trackball. 3. Press the [EBL] key again to fix the EBL to the position. 4. Check the bearing readout to find the bearing of the target. To erase the EBL, press and hold down the [EBL] key for about three seconds.

  • Page 18: Menu Operation

    2. Press the [SHIFT/ZOOM] key. The indi- cation “ZOOM” appears and brinks. 3. To turn off the zoom, press the [SHIFT/ ZOOM] key again, or change the range. (Normal display) Place cursor where desired. Cursor Press the [SHIFT/ZOOM] key. SHIFT Press the [SHIFT/ZOOM] key.

  • Page 19: Echo Stretch

    2.19 Echo Stretch Normally, the reflected echoes from long dis- tance targets appear on the screen as weaker and smaller blips even through they are com- pensated by the radar’s internal circuitry. The Echo Stretch function magnifies these small blips. 1.

  • Page 20: Selecting Ranges

    2.22 Selecting Ranges This radar has 14 ranges, some which you may not require. You can select or deselect ranges as follows. 1. Press the [MENU] key to open the menu. 2. Operate the trackball to select “6. RANGE”. 3. Press the [RANGE] key to place the un- derline under the range you want to se- lect or deselect.

  • Page 21: Watchman

    Note 2: A target echo does not always mean a landmass, reef, ships or surface objects but can imply returns from sea surface or pre- cipitation. As the level of these returns varies with environment, the operator should (prop- erly) adjust the A/C SEA, A/C RAIN, FTC and GAIN to be sure target echoes within the guard zone are not overlooked by the alarm system.

  • Page 22: Plotting

    Loran-C, NNSS (satellite naviga- tor) or GPS navigator whose output formats is IEC 61162 or FURUNO CIF. Data displayable include own ship’s position in lati- tude and longitude (or Loran-C time differ- ences (TDs)), bearing and range to a waypoint selected on the nav aid, own ship’s...
  • Page 23 If the output format is FURUNO CIF a jumper wire must be connected to “JUP1” on the SPU Board in the display unit. Note that for CIF format the bearing measurement method (Magnetic or True) does not appear for bear- ing to waypoint data.

  • Page 24: 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.

  • Page 25: Indirect Echoes

    3.3 Indirect Echoes Indirect echoes may be returned from either a passing ship or returned from a reflecting surface on your own ship, for example, a stack. In both cases, the echo will return from a legitimate contact to the scanner by the same indirect path.

  • Page 26: Sart (Search And Rescue Transponder)

    3.5 SART (Search and Rescue Transponder) A Search and Rescue Transponder (SART) may be triggered by any X-Band (3 cm) ra- dar within a range of approximately 8 n.miles. Each radar pulse received causes it to trans- mit a response which is swept repetitively across the complete radar frequency band.

  • Page 27: Maintenance And Troubleshooting

    4. MAINTENANCE & TROUBLESHOOTING This chapter tells you how to keep your ra- dar in good working order. Before reviewing this chapter please read the safety informa- tion which follows. DANGER Turn off the power before performing any maintenance or troubleshooting procedure.

  • Page 28: Troubleshooting

    4.3 Troubleshooting Table 4-2 contains simple troubleshooting procedures which you can follow to try to re- store normal operation. If you cannot restore normal operation, do not attempt to check inside any unit of the radar system. Any re- pair work is best left to a qualified technician. .

  • Page 29: Life Expectancy Of Magnetron

    4.4 Life Expectancy of Magnetron The following table shows the life expectancy of the magnetrons. Table 4-3 Life expectancy of magnetrons...

  • Page 30: Specifications

    3.4. Modulator 3.5. Intermediate Frequency 60 MHz 3.6. Tuning 3.7. Receiver Front End 3.8. Bandwidth 3.9. Duplexer MODEL 1761 MARK-3 PPI Daylight display, raster scan, 8 tones in monochrome Range (nautical miles) 0.75 1.5 0.08 µs 0.3 µs 41 m 2.9º...

  • Page 31: Display Unit

    4. DISPLAY UNIT 4.1. Indication System 4.2. Picture Tube 4.3. Range, Range Interval, Number of Rings Range (NM) 0.25 Ring Interval (NM) 0.125 0.125 0.25 0.25 0.5 0.5 1 1 2 2 3 4 6 12 Number of Rings 4.1. Markers 4.2.

  • Page 32: Coating Color

    7. COATING COLOR 7.1. Display Unit 7.2. Antenna Unit 8. COMPASS SAFE DISTANCE 8.1. Display Unit 8.2. Antenna Unit Panel: N3.0, Chassis: 2.5GY5/1.5 N9.5 Standard: 0.50 m Steering: 0.40 m Standard: 1.00 m Steering: 0.75 m SP - 3 E3481S01B...

  • Page 33: Index

    A/C RAIN control ... 2-4 A/C SEA control ... 2-3 Bearing measurement ... 2-5 Blind sectors ... 3-2 Brilliance ... 2-2, 2-8 BRILL key ... 2-2 EBL ... 2-5 Echo stretch ... 2-8 Economy mode ... 2-2 Fuse ... 4-1 Gain control ...

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