Page 3 - SAFETY INSTRUCTIONS; ELECTRICAL SHOCK HAZARD; Do not open the equipment.; WARNING; Keep heater away from equipment.; CAUTION; WARNING LABEL
i SAFETY INSTRUCTIONS WARNING ELECTRICAL SHOCK HAZARD Do not open the equipment. Only qualified personnelshould work inside theequipment. Turn off the radar powerswitch before servicing the antenna unit. Post a warn-ing sign near the switchindicating it should not beturned on while the antennaunit i...
Page 4 - ii; TABLE OF CONTENTS; Declaration of Conformity
ii TABLE OF CONTENTS INTRODUCTION .......................................................................................iii SYSTEM CONFIGURATION ..................................................................... iv PRINCIPLE OF OPERATION .............................................................
Page 5 - iii; INTRODUCTION; Features; The main features of the MODEL 1622 are
iii INTRODUCTION A Word to FURUNO Model 1622Owners FURUNO Electric Company thanks you forpurchasing the MODEL 1622 Marine Radar. Weare confident you will discover why theFURUNO name has become synonymous withquality and reliability. For over 50 years FURUNO Electric Companyhas enjoyed an enviable re...
Page 6 - iv; SYSTEM CONFIGURATION
iv SYSTEM CONFIGURATION SIGNAL CABLE (Select one.)MJ-A10SPF0003-050 (5 m)MJ-A10SPF0003-100 (10 m)MJ-A10SPF0003-150 (15 m)MJ-A10SPF0003-200 (20 m)03S9175 (30 m, option for 24 VDC only) ANTENNA UNITRSB-0060 DISPLAY UNIT RDP-125 NMEA 0183 CableMJ-A6SPF0012-050 (5 m)MJ-A6SPF0012-100 (10 m) NAVIGATOR(NME...
Page 7 - PRINCIPLE OF OPERATION; How Radar Determ i nes Range
v PRINCIPLE OF OPERATION What is Radar? The term RADAR is an acronym meaning RAdioDetection and Ranging. It is a device whichmeasures the time it takes for a pulsed signal tobe reflected back from an object. How Ships Determ i nedPositi on Before Radar The use of echoes to determine position did not...
Page 9 - Contro l Descr i p t i on
1 1. OPERATION 1.1 Contro l Descr i p t i on MENU GUARD HM OFF EBL VRM RING RANGE GAIN STC FTC SHIFT TRAIL ZOOM TONE TX POWER TrackDisk Shifts cursor, EBL, VRM; selects items on menus. Increases the range. Suppresses sea clutter. Opens/closes the menu. Decreases the range. Adjusts receiver sensitivi...
Page 10 - Indications and Markers; Figure 1-2 Indications and markers
2 1.2 Indications and Markers 3M TRAIL G (IN) FTC ES IR EBL VRM 45. 0 ˚ 1.25 NM 291.5˚ 0.73 NM 1.5 NM 0.5ZOOMWATCHMAN Range Range ring interval Zoom (flashing) Target trails settingGuard alarm (IN or OUT)Rain clutter suppressor Echo stretch Interference rejector Guardzone Cursor EBL Range rings Rang...
Page 11 - Quick Start; LCD Tone and Brilliance; Figure 1-3 Dialogue for adjustment of; or; Selecting the Range; Figure 1-4 Location of range and range
3 1.3 Turning the Radar On/Off The [POWER] key turns the radar on/off. Whenturning on the power, the control panel lights andthe timer displays the time remaining for warmup of the magnetron (device which transmitsradar pulses), counting down from 1:00 to 0:00. Provided that the radar was once in us...
Page 12 - Receiver Sensitivity; Automatic adjustment of sensitivity; Figure 1-5 Dialogue for automatic; Manual adjustment of sensitivity; Figure 1-6 Dialogue for manual; Suppressing Sea Clutter; Figure 1-7 Appearance of sea clutter
4 1.7 Receiver Sensitivity The [GAIN] key adjusts the sensitivity of thereceiver. It works in precisely the same manneras the volume control of a broadcast receiver,amplifying the signals received. You can adjust the sensitivity manually, or let theunit do it automatically. In either case, the prope...
Page 13 - Automatic sea clutter control; to set level desired. 61 levels
5 Automatic sea clutter control 1. Press the [STC] key once or twice to show the dialogue shown in Figure 1-8. AUTO STC MODLOW HIGH 1 2 3 Figure 1-8 Dialogue for automatic adjustment of STC 2. Press or to set level desired: 1, Low; 2, Normal; 3, High. Manual adjustment of sea cluttercontrol 1. Press...
Page 14 - Basic menu operation
6 1.12 Heading Marker The heading marker indicates the ship’s heading and it is the solid line which appears at zero degrees on the bearing scale. To temporarily erase the heading marker to look at targets existing dead ahead of own ship, press the [MENU] and [GUARD] keys together. Release the keys ...
Page 15 - Table 1-1 Menu description; Control Panel Brilliance; Measuring range by the range rings; Figure 1-13 How to measure range by
7 Table 1-1 Menu description Menu Item Description 1 ECHO STRETCH Stretches echoes in the range direction. 2 INT. REJECT Suppresses radar interference. 3 NAV DATA Turns navigation data on/off. 4 VIDEO Displays echoes in black or white. 5 W ATCHMAN Selects transmitting interval. 6 DIMMER Adjusts cont...
Page 16 - Measuring the Bearing; Measuring bearing by the EBL; Figure 1-14 Measuring bearing by the; Shifting the Display; Figure 1-15 Shifting the display; Figure 1-16 Zoom function
8 1.16 Measuring the Bearing The bearing to a target can be measured by using the cursor or the EBL. Measuring bearing by the EBL 1. Press the [EBL] key to turn on the EBL. 2. Within 10 seconds after turning on the EBL; that is, while "EBL" is highlighted, press ! or " to bisect the targ...
Page 17 - Figure 1-17 Target trails; Starting target trail; Guard Alarm Zone; How guard zone type is determined; When there are targets in the guard; Figure 1-18 Inward and outward alarms
9 1.19 Target Trails Target trails are simulated afterglow of targetechoes that represent their movements relativeto own ship. 3M TRAIL Trail time (3 min),echo trail ON (TRAIL) Figure 1-17 Target trails Starting target trail Press the [TRAIL] key to start the echo trailfunction. "TRAIL" and ...
Page 18 - Setting a guar d zone; Operate the TrackDisk to place the cursor at; Figure 1-19 How to set a guard zone; When the radar range is less than one; Silencing the audible alarm; Interference Rejector; Figure 1-20 Radar interference
10 Setting a guar d zone 1. Operate the TrackDisk to place the cursor at the top left corner of the zone and press the[GUARD] key. 2. Operate the TrackDisk to place the cursor at the bottom right corner of the zone andpress the [GUARD] key. Guardzoneto set * GUARD 1) Drag cursor to top left corner o...
Page 19 - Figure 1-21 Echo stretch; Echo stretch magnifies not only small; Tx; Figure 1-22 How watchman works; Turning watchman o n/off; watchman off as appropriate.; Canceling watchman
11 1.22 Echo Stretch On long ranges target echoes tend to shrink inthe range direction, making them difficult to see.On short and medium ranges such as 1.5, 3 and6 nm range scales, the same sized targets getsmaller on screen as they approach own ship.This is due to the inherent property of theradiat...
Page 20 - Figure 1-23 Sample navigation; Figure 1-24 Sample navigation data; Nav data can be accepted from two
12 1.24 Navigation Data With navigation data input in NMEA 0183 format,navigation data can be displayed at the screenbottom. Navigation data includes position, course,speed, and range and bearing to destinationwaypoint (if set on navaid). Waypoint is shown on the screen by a “lollipopmark,” a dashed...
Page 21 - Echoes in Black or White
13 Note 1: External sensor must be capable of outputting such data to select it on this radar. Note 2: A location is blank when there is no corresponding data. Note 3: To receive data from multiple equipment, all data must be combined into one data line with a data-mixing device. 1.26 Echoes in Blac...
Page 23 - Minim um and maxim u m ranges; Minimum range; is; Maximum range; Figure 2-1 Radar horizon; Radar resolution; Bearing resolution; Bearing accuracy
15 2. RADAR OBSERVATION 2.1 General Minim um and maxim u m ranges Minimum range The minimum range is defined by the shortestdistance at which, using a scale of 1.5 or 0.75nm, a target having an echoing area of 10 m 2 is still shown separate from the point representingthe antenna position. It is main...
Page 24 - Figure 2-2 Multiple echoes; Sidelobe echoes; Figure 2-3 Sidelobe echoes; Virtual image; Figure 2-4 Virtual image
16 Range measuremen t Measurement of the range to a target is also avery important function of the radar. Generally,there are two means of measuring range: thefixed range rings and the variable range marker(VRM). The fixed range rings appear on thescreen with a predetermined interval andprovide a ro...
Page 25 - Shadow sectors; Figure 2-5 Shadow sectors; The SART information below is excerpted; Figure 2-6 Appearance of SART signal; Use the range scale of 6 or 12 nm as the; General remarks on receiving SART; SART range errors
17 Shadow sectors Funnels, stacks, masts, or derricks in the path ofthe antenna block the radar beam. If the anglesubtended at the antenna is more than a fewdegrees, a non-detecting sector may beproduced. W ithin this sector targets can not bedetected. Radarantenna Radarmast Shadow sector Figure 2-5...
Page 27 - Figure 2-7 Appearance of Racon signal
19 Any radar bandwidth of less than 5 MHz willattenuate the SART signal slightly, so it ispreferable to use a medium bandwidth to ensureoptimum detection of the SART. Radar side lobes As the SART is approached, sidelobes from theradar antenna may show the SART responsesas a series of arcs or concent...
Page 29 - Table 3-1 Maintenance program; Period; LCD; Replacing the Fuse
21 3. MAINTENANCE, TROUBL ESHOOTING 3.1 Maintenance Regular maintenance is important for good performance. A maintenance program should beestablished and should at least include the items listed in Table 3-1. Table 3-1 Maintenance program Period Item Check point Action Fixing bolts forantenna unit C...
Page 31 - SPECIFICATIONS OF MARINE RADAR; TRANSCEIVER MODULE
SP - 1 SPECIFICATIONS OF MARINE RADAR MODEL 1622 1. GENERAL (1) Indication System PPI Daylight display, raster scan, 4 tones in monochrome (2) Range, Pulselength (PL) & Pulse Repetition Rate (PRR) Range (nm) 0.125, 0.25, 0.5, 0.75 1, 1.5, 2 3, 4, 6, 8, 12, 16 Pulse Length 0.12 µ s (short) 0.3 µ ...
Page 32 - ENVIRONMENTAL CONDITION
SP - 2 4. DISPLAY UNIT (1) Picture Tube 6 inch rectangular monochrome LCD (2) Display Pixels 240(H) x 320(V) dots, Effective radar display area: 240 x 240 dots (3) Range, Range Interval, Number of Rings Range (NM) 0.125 0.25 0.5 0.75 1 1.5 2 3 4 6 8 12 16 Ring Interval (NM) 0.0625 0.125 0.125 0.25 0...
Page 34 - INDEX
Index-1 INDEX B Bearing measurement ......................................8 C Control description ...........................................1Cursor ..............................................................5 D Depth unit ......................................................12DIMMER key ..........
