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Users Manual

RA775UA

Marine Radar

Instruction Manual

2nd Edition

Communication Systems Division

Information & Communications Group

ANRITSU CORPORATION

Document : E-A775UA-2-01

• Read this manual before using the equipment.

• Keep this manual.

To prevent the risk of personal injury or damage to the equipment, Anritsu Corporation

uses the following safety symbols to indicate safety-related information. Insure that you

clearly understand the meanings of the symbols BEFORE using the equipment.

Symbols Used in Manual

This indicates a very dangerous procedure that could result

in serious injury or death if not performed properly.

This indicates a hazardous procedure that could result in se-

rious injury or death if not performed properly.

This indicates a hazardous procedure or danger that could

result in light-to-severe injury, or that might damage the

equipment, if proper precautions are not taken.

Safety Symbols Used on Equipment

The following safety symbols are used inside or on the equipment near operation loca-

tions to provide information about safety items and operation precautions. Insure that

you clearly understand the meanings of the symbols and take the necessary precau-

tions BEFORE using the equipment.

This indicates high voltages with a risk of serious electric shock if the

part is touched. NEVER touch the part with bare hands, etc.

The symbol prohibits the operation shown inside the symbol. (The

example in the left prohibits disassembly.)

The symbol indicates that the operation inside the symbol is

potentially hazardous. (The example on the left indicates that the plug

should be held when disconnecting it from the AC outlet.)

This indicates the ground (earth) terminal. If the equipment cannot be

grounded via the power cord, connect this terminal to ground. There

is a risk of serious electric shock if the equipment is not grounded.

RA775UA

Marine Radar

Instruction Manual

25th Aug. 1999 (2nd Edition)

14th July. 1999 (1st Edition)

mission of the publisher. The contents of this manual may be changed without prior notice.

Printed in Japan

Safety Symbols

DANGER

WARNING

CAUTION

・DO NOT OPEN THE COVER EXCEPT SERVICE

PERSONNEL. YOU MAY GET AN ELECTRIC SHOCK.

・SWITCH OFF SHIPS MAIN BEFORE MAINTENANCE.

ROTATING ANTENNA MAY HIT YOU.

・ KEEP OFF DURING TRANSMISSION.

RADIATION LEVEL: 10W/m2 DISTANCE : 1.8m

・ DO NOT DROP COVER.

IT MAY HIT SOMEBODY.

・サービスマン以外はふたを開けないでください。

感電するおそれがあります。

・作業前に主電源を切って下さい。

回転しているアンテナでけがをするおそれがあります。

・送信中に近付かないでください。

放射レベル : 10W/m2 距離 : 1.8m

・カバーなどを落下させないでください。

下にいる人が危険です。

・DO NOT PAINT THE RADOME.

PERFORMANCE WILL DOWN. ・レドームにはペンキを塗らないでください。

性能が落ちます。

•There is a risk of receiving electric shock if these parts are touched by

accident. Only qualified personnel should remove covers on these

parts.

‚To avoid accidental antenna rotation, turn off ship’s main and pull off

out the motor fuse during repair inspect, or maintenance.

When repairing or inspecting the scanner unit wear a safety harness

and provide a secure platform so that there is no danger of falling even

when the vessel lists or when there is an unexpected incident such as

an earth quake.

ƒDo not approach the antenna while it is transmitting.

In addition, at inspection never look into the wave guide during trans-

mission.

„When remove the scanner cover etc., do not drop it. It may endanger

people below.

…Do not paint the RADOME. Antenna performance will be down.

For Safety

！

WARNING / 警告

！

CAUTION / 注意

③

④

⑤

①

②

iii

・ SEE INSTRUCTION MANUALS BEFORE

CONNECTING POWER.

SAFETY INFORMATION IS WRITTEN IN.

・ EARTH CONNECTION ESSENTIAL

BEFORE CONNECTING POWER.

YOU MAY GET AN ELECTRIC SHOCK.

・ DO NOT OPEN THE COVER EXCEPT

SERVICE PERSONNEL.

HIGH VOLTAGE IS INSIDE.

YOU MAY GET AN ELECTRIC SHOCK.

・電源接続する前に、必ず取扱

説明書を読んでください。

安全情報が記載されています。

・電源接続する前に、アース接続

を行ってください。

感電のおそれがあります。

・サービスマン以外は、ふたを

開けないでください。

高圧部分があり、感電のおそれ

があります。

•See instruction manuals before connecting power. Safety information is

written in.

‚Earth connection essential before connecting supply.

There is a risk of serious electric shock if the equipment is not

grounded.

ƒThere is a risk of receiving electric shock if these parts are touched by

accident.

Only qualified personnel should remove covers on these parts.

！

WARNING / 警告

①

②

③

Installation

Radio laws dictate that this radar may only be installed by properly licensed personnel.

Licensing

You must obtain a license as prescribed by the Radio Law to operate this unit.

Exporting

According to the sales agreement with your distributor, this product is for use only within your

country. When taking it overseas, there may be cases where you must obtain export

permission. Contact Anritsu Corporation or one of our dealers as soon as possible if you are

planning to take the product out of your country.

Equipment Certificate

Anritsu Corporation certifies that this equipment was tested before shipment, to meet recog-

nized standards.

Warranty

Anritsu Corporation warrants this equipment to be manufactured in accordance with pub-

lished specifications and free from defects in materials and/or workmanship.

Anritsu Corporation will repair or exchange any parts except consumable parts proven to be

malfunctioning under normal use for a period of two (2) years. This warranty policy shall not

cover any labor charge.

Limitation of Warranty

Anritsu Corporation’s warranty policy does not apply to product which has been subjected to

accident, abuse, or misuse, shipping damage, alterations, corrosion, incorrect and/or unau-

thorized service or modification, or product which the serial number plate has been altered or

removed.

ANRITSU CORPORATION MAKES NO WARRANTIES, EITHER EXPRESS

OR IMPLIED, EXCEPT AS PROVIDED HEREIN, INCLUDING WITHOUT

LIMITATION PARTICULAR PURPOSE OR USE, OR AGAINST INFRINGE-

MENT OF ANY PATENT. IN NO EVENT SHALL ANRITSU BE LIABLE FOR

ANY DIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY

NATURE, OR LOSSES OR EXPENSES RESULTING FROM ANY DEFEC-

TIVE PRODUCT OR THE USE OF ANY PRODUCT.

Should you have queries about maintenance, please contact our distributor.

To Customers

* To use this equipment effectively, the operation and maintenance procedure in this manual

must be followed properly. Note that this equipment is only a navigational instrument having

no warrant for navigation safety. Non-execution of fundamental navigation requirements

such as the ship location check or lookout is not allowed.

* If some abnormality occurs in this equipment, immediately turn off the equipment POWER

switch and the radar main switch in the power distribution board and notify our maintenance

section or dealer.

* This instrument uses oscillator and LCD backlight. They are easy to be broken. Do not sub-

ject the instrument to excessive force or drop it.

* The mercury (Hg) is used in LCD backlight. When you discard your radar, it is due to laws or

regulations of your nations.

Contents

For safety

CHAPTER 1 OVERVIEW.................................................................................1

1.1 Introduction.......................................................................................................1

1.2 Organization of This Manual............................................................................1

CHAPTER 2 USING RADAR FOR THE FIRST TIME...................................2

2.1 What is a radar ?...............................................................................................2

2.2 Characteristics of Radar Wave..........................................................................3

2.3 Terms Specific to Radars...................................................................................6

CHAPTER 3 INSTALLATION.........................................................................10

3.1 Checking Contents of Your Package.................................................................10

3.2 Checking Power Supply Voltage.......................................................................11

3.2.1 Power Supply Requirement .........................................................................11

3.2.2 Fuse Replacement ........................................................................................11

3.3 Determining Place of Installation.....................................................................12

3.3.1 Scanner unit.................................................................................................12

3.3.2 Display unit..................................................................................................12

3.3.3 Shifting away from obstacles .......................................................................13

3.4 Installing Scanner Unit ....................................................................................14

3.5 Installing Display Unit .....................................................................................15

3.6 Connecting Cables.............................................................................................17

3.6.1 Interconnecting cable...................................................................................17

3.6.2 Grounding wire ............................................................................................19

3.6.3 Power supply cable.......................................................................................20

3.7 Adjustment........................................................................................................21

3.8 Connecting External Equipment to Display Unit ............................................21

3.9 Countermeasure for Electromagnetic Interference..........................................22

3.10 When Discarding Your Radar.........................................................................23

CHAPTER 4 FUNCTIONS AND NAMES....................................................... 24

4.1 Key layout .........................................................................................................24

4.2 Rear panel .........................................................................................................25

4.3 Radar screen (Single screen).............................................................................25

4.4 Radar screen (Dual screen)...............................................................................26

4.5 Radar screen (All PPI screen)...........................................................................26

4.6 Radar screen (All PPI/PPI screen)....................................................................27

4.7 Navigation screen..............................................................................................27

CHAPTER 5 OPERATION...............................................................................28

Basic operation of Radar.........................................................................................28

5.1 Powering On and Off.........................................................................................28

5.2 Adjusting contrast and brilliance of the screen, and key-backlight.................28

5.3 Basic Operations ...............................................................................................29

5.3.1 Powering On and Off....................................................................................29

5.3.2 Transmitting ................................................................................................29

5.3.3 Adjusting contrast and brilliance of the screen, and key-backlight............30

5.3.4 Changing Distance Range (RANGE UP, RANGE DOWN)......................... 30

5.3.5 Automatic adjustment (AUTO).................................................................... 30

5.3.6 Sensitivity adjustment (GAIN).....................................................................31

5.3.7 Removing sea clutter (STC)..........................................................................31

5.3.8 Removing rain and snow clutter (FTC)........................................................32

5.3.9 Man Over Board (MOB)............................................................................... 32

5.4 Functions of Soft Keys...................................................................................... 33

5.4.1 Bearing measurement (EBL1)..................................................................... 33

5.4.2 Bearing measurement (EBL2)..................................................................... 33

5.4.3 Distance measurement (VRM1)................................................................... 33

5.4.4 Distance measurement (VRM2)................................................................... 34

5.4.5 Measuring the angle between two points (FL EBL2).................................. 34

5.4.6 Measuring the distance between two points (FL VRM2)............................ 34

5.4.7 Changing the group of Soft Keys(NEXT) .................................................... 35

5.4.8 Erasing heading maker temporarily (HDG OFF) ....................................... 36

5.4.9 Using parallel cursors (///CSR) .................................................................... 36

5.4.10 Establishment of the indication of the RANGE RINGS (RINGS)............. 36

5.4.11 ON/OFF of variable range function (VAR RNG)....................................... 36

5.4.12 Changing display modes (MODE).............................................................. 36

5.4.13 Guard Zone (GZ) ........................................................................................ 36

5.4.14 Off Center (OFF-C) .................................................................................... 37

5.4.15 Setting of the SLEEP function(SLEEP)..................................................... 38

5.4.16 Tuning adjustment (TUNE)....................................................................... 38

5.4.17 Echo expansion (ST)................................................................................... 39

5.4.18 Displaying locus of target (TRACK)........................................................... 39

5.4.19 Enlarging selected areas (ZOOM).............................................................. 39

5.4.20 Increasing sensitivity (S/L)........................................................................ 40

5.4.21 Switching the screen (SEL WIN)............................................................... 40

5.4.22 Reversing the screen (PICTURE).............................................................. 40

5.4.23 Change to PPI screen (PPI) ....................................................................... 41

5.4.24 Change to SEMI3D/PPI screen (SEMI3D) ................................................ 41

5.4.25 Change to PPI/PPI screen (PPI/PPI) ......................................................... 41

5.4.26 Change to PPI/NAV screen (PPI/NAV)...................................................... 42

5.4.27 Change to ALL PPI screen (ALL PPI)....................................................... 42

5.4.28 Change to ALL PPI/PPI screen (ALL PPI2).............................................. 42

5.5 MENU Operation.............................................................................................. 43

List of MENU.................................................................................................... 43

5.5.1 Mark Menu .................................................................................................. 44

5.5.1.1 Bearing measurement (EBL1)................................................................. 44

5.5.1.2 Determining the distance (VRM1)........................................................... 45

5.5.1.3 Bearing measurement (EBL2)................................................................. 45

5.5.1.4 Determining the distance (VRM2)........................................................... 45

5.5.1.5 Measuring the distance or angle between two points ( FL EBL2, FL VRM2 )

......................................45

5.5.1.6 Measuring the angle between two points (FL EBL2).............................. 46

5.5.1.7 Erasing heading maker temporarily (HDG OFF) ................................... 47

5.5.1.8 Using parallel cursors (///CSR) ................................................................ 47

5.5.1.9 Establishment of the indication of the RANGE RINGS (RINGS)........... 48

5.5.1.10 Variable range function ( VAR RNG ) ................................................... 48

5.5.1.11 Output the position data of Cursor (TARGET)...................................... 49

5.5.1.12 Follow the Distance and Bearing marker on the cursor (+MK LINE).. 49

5.5.2 Nav (Navigation) Menu ................................................................................ 50

vii

5.5.2.1 Changing display mode (MODE)............................................................50

5.5.2.2 Guard Zone (GZ)......................................................................................51

5.5.2.3 Shifting display in specific direction (OFF-C)..........................................52

5.5.2.4 Setting of the SLEEP function(SLEEP)...................................................52

5.5.3 Echo Menu......................................................................................................54

5.5.3.1 Sensibility adjustment (GAIN).................................................................54

5.5.3.2 Removing sea clutter (STC)......................................................................55

5.5.3.3 Removing rain and snow clutter (FTC)....................................................55

5.5.3.4 Adjusting receiver tuning (TUNE)...........................................................55

5.5.3.5 Echo expansion (ST).................................................................................55

5.5.3.6 Displaying locus of target (TRACK) ........................................................56

5.5.3.7 Enlarging selected areas (ZOOM) ...........................................................57

5.5.3.8 Increasing sensitivity (S/L) ......................................................................57

5.5.4 SETUP Menu...............................................................................................59

5.5.4.1 Initiating the screen display (WINDOW) ................................................59

- The limitation of the screen operation..............................................................60

- Screen modes and Operations ...........................................................................60

(a) PPI Screen .............................................................................................60

(b) PPI/SEMI3D Screen ..............................................................................61

(d) PPI/NAV Screen ....................................................................................62

(e) ALL PPI Screen .....................................................................................62

(f) ALL PPI/PPI Screen...............................................................................62

(g) MOB Screen...........................................................................................63

5.5.4.2 Switching screens on PPI/PPI screen (SEL WIN) ...................................63

5.5.4.3 Reversing the screen (PICTURE) ............................................................63

5.5.4.4 Fault Diagnosis by Self Check (SYSTEM CHECK).................................64

5.5.4.5 Changing the content of the setting (CUSTOM) .....................................66

5.5.4.5.1 Changing the settings of soft keys (KEY ASSIGN) .............................67

5.5.4.5.2 Changing the content of settings 1(PRESET1)....................................69

5.5.4.5.3 Changing the content of settings 2 (PRESET2)...................................71

5.5.4.5.4 Changing the content of settings (ADJUSTMENT)..............................73

(1) Adjusting distance (TIMING ADJ)......................................................73

(2) Adjusting angle (HEAD ADJ)..............................................................73

(3) Adjusting tuning circuit (TUNING CAL) ............................................74

(4) Adjusting antenna height (ANTENNA)...............................................75

(5) Setting automatic gain circuit (AUTO GAIN) .....................................76

(6) Setting automatic STC circuit (AUTO STC)........................................76

(7) Setting HARBOR STC circuit (HARBOR)...........................................76

CHAPTER 6 MAINTENANCE AND INSPECTION.......................................77

CHAPTER 7 TROUBLESHOOTING............................................................... 79

7.1 Fault Diagnosis by Self-check...........................................................................79

7.2 Inspecting Each Part.........................................................................................80

CHAPTER 8 PRODUCT SPECIFICATIONS ..................................................81

8.1 General...............................................................................................................81

8.2 Scanner Unit ......................................................................................................82

8.3 Display Unit .......................................................................................................82

viii

8.4 External Interface..............................................................................................83

8.5 Standard set.......................................................................................................83

8.6 Options...............................................................................................................84

8.7 External dimensions and weight.......................................................................84

8.8 External Interface..............................................................................................84

APPENDIX

1. GENERAL SYSTEM DIAGRAM 24W160941

2. INTERCONNECTION DIAGRAM 24W160939

3. OUTLINE DRAWING DISPLAY UNIT 23W72646

4. OUTLINE DRAWING SCANNER UNIT 23W68739

5. FLUSH MOUNT PROCEDURE

6. TEMPLATE OF SCANNER MOUNTING HOLES (ACTUAL SIZE)

7. INDEX

CHAPTER 1 OVERVIEW

●1.1 Introduction

The RA775UA represents a compact, high-performance marine radar that delivers a peak

power output of 2 kW from the antenna and uses an 10-inch monochrome liquid crystal display.

In addition to a microcomputer, it incorporates a video signal processing LSI and a newly

developed LSI chip exclusively designed for radars, thus providing versatile functionality and

high performance.

Features

1. A thin display unit incorporating a liquid crystal display.

2. Easy operation using only a few keys and menu screens.

3. A position of key and its function can be set in position ( Selectable soft function key).

4. Easy operation by the rotary knob.

Gain, STC, FTC, EBLs, VRMs etc. can be controlled by the rotary knob.

4. A short and a long range echo can be seen at a time ( Dual range radar).

5. Semi-3D screen display for easy identification of targets in noise.

6. Capable of continuous distance range changes (Continual variable range).

7. Waterproof construction of display allows installation at any desired location.

●1.2 Organization of This Manual

This manual provides a wide range of information necessary to operate the RA775UA ra-

dar ranging from the basic knowledge on radars to the methods of operating, installing, and

maintaining the RA775UA radar. The manual also provides rather detailed technical informa-

tion on how to adjust video display to obtain clear images. Anritsu recommends you to read

this manual thoroughly from beginning to end in order to understand the various functions of

the RA775UA radar so you can take full advantage of its advanced functions. If you are using a

radar for the first time, refer to the basic data on radars in CHAPTER 2.

This manual consists of the following chapters:

USING RADAR FOR THE FIRST TIME ...................... CHAPTER 2

INSTALLATION ...................... CHAPTER 3

FUNCTIONS AND NAMES ...................... CHAPTER 4

OPERATION ...................... CHAPTER 5

INSPECTION AND MAINTENANCE ...................... CHAPTER 6

TROUBLESHOOTING ...................... CHAPTER 7

PRODUCT SPECIFICATIONS ...................... CHAPTER 8

If you are an experienced user of radars, skip CHAPTER 2 and begin from CHAPTER 3.

CHAPTER 2. USING RADAR FOR

THE FIRST TIME

This chapter describes basic information on radars and explains technical terms used in ra-

dar operation for those who is using a radar for the first time.

●2.1 What is a radar ?

A marine radar is one of the navigation equipment installed on a ship. It emits a radio wave

in very high frequency called a microwave from its antenna and receives the reflected radio wave

from objects on the sea (e.g., other ships, buoys, and lands). The received radio wave is converted

into an electric signal which is displayed on a display screen to indicate the presence of such ob-

jects. Although it is very difficult to find other ships or the destination coast with human eyes at

night or in thick fog, a radar helps you detect objects on the sea helping you avoid danger when

sailing. The antenna turns 360 degrees as it radiates waves, allowing you to grasp ambient

conditions around your ship at a glance.

The radio wave radiated from the antenna is called a pulse wave and the radar performs

transmission and reception alternately. Several hundred to several thousand pulse waves gener-

ally are transmitted while the antenna rotates one turn.

Antenna

There are many types of antennas generally used for a

radar. For example, these include a parabolic antenna and a

slotted-array antenna. The performance of the antenna

determines that of the radar. The dominant factors are the

antenna's beam width and side lobe level. The narrower the

beam width, the higher the resolution of the angle direction.

The lower the side lobe level, the fewer the effect of a false echo.

Side lobe

A beam in one direction in which the strongest radio

wave is radiated from the antenna is called the main lobe

and beams in other directions are called "side lobes". The

side lobe level refers to the difference in level between

the largest side lobe and the main lobe.

Buoy

Other ship Radar wave

Your ship Antenna (Rotating)

Radar display

Fig.2-1 What is a radar?

Beam width

Side lobe

level

Main beam

Side lobe

Antenna

Fig.2-2 Antenna pattern

Beam width

A beam width is defined as the width of the main lobe at an angle where the radiated

power is halved as measured from the position from which the strongest radio wave is radi-

ated.

●2.2 Characteristics of Radar Wave

Radio waves from the radar propagate while bending slightly along the terrestrial surface.

This characteristic varies dependent on the density of the atmospheric air. The sight distance D of

a radar generally is said to be approximately 6% longer than the optical sight distance and is

calculated using the equation below :

D (NM) = 2.22 ( h1 + h2 ) where, h1= antenna height in meters

h2= target height in meters

Fig.2-3 Radar wave

Targets difficult to display on screen

The intensity of the reflected wave from a target depends on the distance, height, and

size of the target, as well as its material and shape. Targets constructed with FRP, wood, or

other low-reflectance materials or those that have a small incident angle are difficult to dis-

play on a screen. Therefore, FRP and wooden ships, sandy beaches, and sandy or muddy

shallows all are difficult to catch and require attention when monitoring on the screen. Es-

pecially, coast lines on the radar image appear to be present more apart from the ship than

they are actually located. Therefore, it is important not to misinterpret the available data.

Shadow zones of radar

Radar waves are characteristic in that they propagate straight ahead. Therefore, if the

ship's smokestack or mast is located near the antenna or there is a tall ship or mountain at

the side of the ship, such an object generates a shadow behind it. In this case, some objects

produce a complete shadow and some produce a partial shadow. In an extreme case, the

Apparent coastline

Actual(invisible)

coastline

Invisible

Visible

Fig.2-4 Targets difficult to display on screen

h1 h2

Line of sight

Radar Radio

Wave

Earth

shadow of an object may extend to a position far away and cannot be displayed on the screen

at all. Since these shadows can be discovered when installing an antenna, the problem can

be avoided by changing the place of antenna installation to minimize the shadow. Targets in

shadow zones are difficult to display on the screen.

False echoes

A false echo of an actually nonexistent object may sometimes appear on the screen

when sailing. The following explains the cause of each of such phenomena.

A. Ghost echoes

It sometimes happens that one large object near the ship appears at two different bear-

ings. One is the actual echo and other is a ghost echo generated as the wave is re-reflected

from the ship's own smokestack or mast. The former appears at the correct distance and

bearing on the screen and the latter appears behind the smokestack or mast. This type of

false echo is also generated by re-reflection of waves from bridges and quay walls other than

the ship itself.

B. Multiple echoes

If there is a large vertical reflecting plane near the ship as in the case when your ship

passes alongside a large ship, the wave is repeatedly reflected back and forth between your

ship and the other object. For this reason, two to four images appear on the screen at equal

intervals in the same bearing. A false echo that is generated by such multiple reflections is

called multiple echoes. In this case, an image appearing at the nearest position is the real

echo. Multiple echoes disappear as the ship moves away from the reflecting object or its

bearing changes. Therefore, it is not difficult to determine the correct image.

Target

Direct reflection

path

Secondary

reflection path

Mast etc.

Real echo

Ghost echo

Direction of ghost echo

１

Fig.2-5 False echoes of radar (Ghost echoes)

C. False echoes caused by side lobe

The radiant beam emitted from an antenna contains side lobes in directions other than

that of the main beam. Since the side lobe level is low, it in no way affects distant targets.

However, if there is a strong reflecting target near the ship, it sometimes appear as a circu-

lar-arc false echo on the screen.

When located near large targets such as land, the

ship's mast, etc. sometimes appears as a false echo

of circular-arc shape.

HU Real echo

Multiple

echoes

Fig.2-6 False echoes of radar (Multiple echoes)

１

Antenna

Main beam

Side lobes

Real echo

False sidelobe

echoes

Fig.2-7 False echoes of radar (Caused by side lobe)

CAUTION

D. Distant false echoes caused by duct phenomenon

Depending on meteorological conditions, duct phenomenon sometimes occurs in tem-

perature inverting layers of air. In such a case, the wave propagates erratically reaching a

location surprisingly far away from the ship. In this case, a target present at a distant loca-

tion more than the radar's maximum distance range appears on the screen presenting a

false echo that can be misunderstood to be present nearer than the actual position. This

phenomenon is attributed to the fact that since echo from the distant target arrives late, it

gets out of the pulse repetition frequency and is displayed on the screen as an echo in the

next frequency. If the target distance changes as you switch over the distance range, you

can determine that it is a false echo.

Radar interference

If a radar operating in the same frequency exists near

your ship, interference noise may appear on the screen that is

caused by transmitted waves from that radar. This interfer-

ence appears in various ways. In most cases, however, it ap-

pears as spiral or radial patterns.

The RA775UA radar has a function to eliminate interfer-

ence. Use of this function helps you minimize interference.

●

2.3 Terms Specific to Radar

HM (Heading Marker)

This is a line-shaped marker used to indicate

the advancing direction of your ship.

North Mark

This marker indicates the north direction. It

is a short line approximately 1/6 of the screen

size.

１

Radar inrterference

Fig.2-8 Radar interference

0.75

0.25

HM(Heading Marker)

North Mark

Fig.2-9 Heading Marker and

North Mark

Display modes

This refers to a radar's display modes. There are four display modes depending on the direc-

tion in which the top of the screen faces with respect to the ship.

Head Up (HU)

In this mode, the ship's heading always indicates the upward direction of the screen.

This mode lets you know the relative positions of your ship and other ships or land.

North Up (NU)

In this mode, the north direction always indicates the upward direction of the screen,

allowing you to compare your ship position with a marine chart as you navigate.

Course Up (CU)

The ship's heading in a course-up mode always indicates the upward direction of the

screen as the bearing toward the destination. In this mode, the ship can be maneuvered to

sail the shortest distance to the destination by steering it in such a way that its heading

marker always directs to the upward direction of the screen. If the ship drifts due to tidal

current, care must be taken because the fixed targets move to other positions.

True Motion (TM)

In this mode, the ship is displayed as if it is moving on a marine chart while the fixed

targets such as islands and seashores are fixed in position. When the ship reaches a certain

position on the screen (approx. 2/3 of screen size), the ship is placed back to the opposite side

on the screen. (The top of the screen faces north.)

Note: Navigation equipment such as a gyrocompass or magnet compass must be connected

to your radar system before it can be operated in NU, CU, and TM modes. (Refer to Section

3.9 for details on how to connect your radar to navigation equipment.)

Ship's

Heading

North

Scheduled

course

EBL

North

mark

HU NU CU TM

Ship's locus

(not displayed on screen)

NorthNorth Scheduled

course

0.75 0.75 0.75 0.25

0.25

0.75

Fig.2-10 Display modes

VRM (Variable Range Marker)

This is a circular-shaped marker whose size can be changed as desired. You can use this

marker when you want to examine the distance of an echo from your ship.

When measuring the distance of an echo from your ship, be sure to measure at a point close

to the center of the echo image on the screen.

EBL (Electronic Bearing Line)

This is a marker shaped like a straight line segment that can be changed to any direction

centering around the ship position. Use this marker to examine the advancing direction of your

ship and its relative angle with an echo. When measuring the angle of an echo, position the

marker at the center of the echo.

VRM

Echo

0.75

0.25

VRM

Fig.2-11 VRM

0.75

0.25

HU EBL Echo

EBL

Equal intervals

Fig.2-12 EBL

STC (Sensitivity Time Control)

Since echo signals received by the radar are strong when they are coming from a short dis-

tance, it is difficult to compare signal strength between each reflected signal. To overcome this

difficulty, signal strength is adjusted in such a way that the received signal levels coming from a

short distance are lowered and those from a long distance are raised. This function should prove

useful when there are large reflected waves from sea surfaces during rough weather.

FTC (Fast Time Constant)

When it rains or snows, fine noise may appear over the entire screen, making it difficult to

identify echoes. In such a case, echo images on the screen can be made easily distinguishable by

adjusting FTC.

0.75

0.25

STC OFF STC ON

0.75

0.25

Echo is suppressed

around center

Fig.2-13 STC

0.75

0.25

FTC OFF FTC ON

0.75

0.25

Small noises

are reduced.

Fig.2-14 FTC

CHAPTER 3. INSTALLATION

This chapter describes procedures for installing the RA775UA radar in your ship and precau-

tions to be observed during installation. Follow the procedure below to install the radar.

●3.1 Checking Contents of Your Package

First, unpack your package and see if all of the following items are included.

Item QTY

Display unit 1 (RF718A)

Scanner unit 1 (RB714A)

Display cover 1

Fuse 2

Interconnecting cable 1 (10 m)

Power supply cable 1 (2 m)

M10 hexagonal bolt 4 sets

The package contains a 10m interconnecting cable as an accessory. Longer cable is also

available as an option as listed in Tab.3-1.

Checking contents of your package

Checking power supply voltage

Determining place of installation

Installing scanner unit

Installing display unit

Connecting cables

Adjustment

Connecting external equipment

When discarding Your radar

Tab.3-1 Optional Interconnecting Cable

In addition to the above components included with your package, the following items are also

required. Please prepare them separately.

Item QTY Remarks

Tapping screw or M5 bolt and nut 6 sets To install display unit

Grounding wire 1Earth line for display unit

Grounding wire and crimp terminal 1 set Earth line for scanner unit

●3.2 Checking Power Supply Voltage

3.2.1 Power Supply Requirements

For the RA775UA radar to be operated normally, the power supply (battery) detailed in

Tab.3-2 is required. Note also that if the battery is discharged, its voltage may fluctuate greatly,

causing the radar to malfunction. When start up the radar system or start transmitting, an addi-

tional rush current is required on the power line. Carefully check the power supply system includ-

ing wiring by using a circuit tester.

Tab.3-2 Power Supply Requirements

*A.C. power cannot be used

3.2.2 Fuse Replacement

For the RA775UA radar to be operated safely, proper rating fuses must be used. Tab.3.3 is

the fuse rating table. Please check them and replace to the fuse in the package.

Tab.3-3 Supply Voltage to Fuse Table

Note: Marked * fuses are in the set as standard.

Cable length Ordering Product No.

15m 242J160680B

20m 242J160680C

30m 242J160680D

Supply voltage used Maximum current Allowable range of voltage

DC12V 5A 10.2-41.6V

DC24V 2.5A 10.2-41.6V

Supply voltage used Main Fuse Motor Fuse

DC12V 8A/250V or 125V *

(6.3Φ x 32mm) T3.15A/250V or 125V *

(5Φ x 20mm)

DC24V 8A/250V or 125V

(6.3Φ x 32mm) T3.15A/250V or 125V

(5Φ x 20mm)

●3.3 Determining Place of Installation

3.3.1 Scanner unit

A radar's target detection capacity varies greatly depending on the fitted position of the scan-

ner. An ideal fitting position is a location high above the ship's keel line where there is no obstacle

all around the scanner. In an actual ship, such an ideal location is limited by various factors.

Therefore, consider the following suggestions when you determine the place to install the scanner:

(a) Install scanner at a position as high as possible.

The higher the installation position, the longer the radio ranging distance. In-

stall the scanner at a position as high as possible after considering the ship's hull

structure and radar maintainability.

(b) Install scanner away from smoke-stack and mast

If the scanner is installed at the same height as the smoke-stack or mast, radar

waves may be blocked, creating shadow zones or generating false echoes. Therefore,

do not install the scanner at such a position.

To avoid creating shadow zones or generating false echoes, install the scanner at

a position nearer to the ship's bow away from obstacles. When installing the scanner

on a mast, position it in front of the mast. (If obstacles cannot be avoided for the ship's

structural reasons, refer to "Shifting away from obstacles" described Page 13.)

(d) Do not install the scanner near hot or heat-generating items.

Do not install the scanner at a position where it may be subjected to smoke or hot

air from smokestacks or heat from lamps.

(e) Install the scanner away from antennas of other equipment.

Install the scanner as much away from the antennas of a direction finder, radio

transceiver, etc. as possible.

To eliminate the interference, install the scanner

away from the antenna of radio transceivers.

(f) Make the cable length as short as possible.

Keep the distance from the scanner to the display unit within the standard cable

length of 10 m. If you use longer cable for unavoidable reasons, limit the cable length

to a maximum of 30 m.

3.3.2 Display unit

The display unit can be installed on desktop, wall surface, or ceiling. Determine the place to

install the display unit that is convenient for navigation and radar operation after considering the

following suggestions:

(a) A place where you can see the ship's bow when you raise your face from the

radar screen.

(b) A place where there is no direct sun-light to avoid display temperature up.

(d) A place where the display unit is apart more than the minimum safe distance

from a magnet compass as listed in Tab.3-3 below.

Tab.3-5 Minimum Safe Distance from Magnetic Compass

Master compass Steering compass

Scanner unit

2.0m 1.4m

Display unit

2.0m 1.4m

!CAUTION

3.3.3 Shifting away from obstacles

•

Shifting from keel line

By shifting the scanner position from the keel line to the starboard side of the

ship, it is possible to move shadow zones to the port side which makes it possible to

keep clear vision in the bow direction. The distance to be shifted can be obtained by

calculation depending on the distance from the scanner to obstacles using the follow-

ing equation:

Ls=0.4R+D/2 [m] (when R<15m)

Ls=0.025R+D/2 [m] (when R>=15m)

where Ls = distance to be shifted from keel line

D = diameter of obstacle on keel line

R = distance from scanner to obstacle

‚

Obtaining sufficient dip angle

Raise the scanner position so that there is a sufficient dip angle θ available be-

tween the line of sight from the scanner to the obstacle and the horizontal line. By

raising the dip angle above 5°, it is possible to prevent mid- and long-distance shadow

zones. The radar cannot detect objects below the line of sight.

Scanner Unit

Obstacle

Keel line

Fig.3-1 Shifting from keel line

Horizontal line

Line of sight

Fig.3-2 Obtaining sufficient dip angle

●3.4 Installing Scanner Unit

When you have decided the place of installation, install the scanner unit. If a mount base like

the one shown below is available, it may be easier to install the scanner. If such a mount base is

not available in your ship, you may install the scanner directly to the roof, etc. In such a case, pay

attention to the water drain tube located at the bottom of the scanner unit during installation.

Note : When the radar mast or mounting bracket has a curvature of more than 2mm, repair it or

use spacers.

Referring to Fig.3-4, open holes in diameter of 12 mm (0.47 in.) at five locations in the mount

base and use these holes to fix the scanner unit to the mount base with hexagonal bolts. (Use the

template included with this manual.) The bolts included with your radar equipment will suffice

for mount base thickness of 9 to 14 mm (0.35 to 0.55 in.). If the mount base is thicker or thinner

than this, prepare bolts listed in Tab.3-4.

Use sealing of silicon when you prevent the bolts from becoming loose. Radome may be broken

if you use locking putty.

Do not use an edge that might trap water.

Fig.3-3 Mount base

Center

140

12φ × 5

Forward

(5.51 in.)

(2.36 in.)

(0.47 in.)

(1.18in.)

For air tube

(5.51 in.)

Fig.3-4 Hole positions for mounting scanner

Tab.3-6 Bolts for Mounting Scanner Unit

●3.5 Installing Display Unit

After you have finished installing the scanner unit, install the display unit in the same way.

Choose the proper bolt length according to the thickness of the surface on which you are going to

install the display unit. Hole diameter is different using bolts from using tapping screw. When

using tapping screw, open holes in adequate holes. When using bolts and nuts, open holes in di-

ameter of 6 mm (0.24 in.). When you have opened holes, install the pedestal part first and then the

display unit.

Fix four screws

Mount base

Washer

Spring washer

M10 Hexagonal bolt

Radome(bottom)

Chassis

Included

Fig.3-5 Fixing Scanner Unit

Thickness of

mount base Bolts necessary to

fix radome scanner Material Remarks

1-4mm(0.04-0.16 in.) M10 ×

15 (1.5mm pitch) Stainless

4-9mm(0.16-0.35 in.) M10

20 (1.5mm pitch) Stainless

9-14mm(0.35-0.55 in.) M10 × 25 (1.5mm pitch) Stainless Included with radar

14-19mm(0.55-0.75 in.) M10

30 (1.5mm pitch) Stainless

360

Fitting hole

(14.17 in.)

(3.31 in.)

Hole diameter

6mm : Bolts and Nuts

Adequate : Tapping screws

Recommended screw

M5 or equivalent

Unit : mm

47 (1.85 in.)

37 (1.46 in.)

(2.36 in.)

240

(9.45 in.)

(2.36 in.)

Forward

Fig.3-6 Hole positions for display unit

Note : When you install the display by flush mount, refer to appendix "OUTLINE DRAWING".

Slide off four triangle corner cover, and fix the display unit to the panel with screws. After fixing

the display unit, put on corner covers to the corner of the display unit. See APPENDIX.

Avoid a display from operating under direct sun-

light. It becomes high temperature at inside of dis-

play and display may be broken.

!WARNING

●3.6 Connecting Cables

Lay cables firmly in place by following the instructions below.

Note1: Do not bind the cable for the radar collectively with cables of other equipment

(especially power supply cable).

Note2: Leave clearance near the inlet of the display so you can remove the display

unit easily. This facilitates installation and maintenance of the display unit.

(Refer to Appendix 1.)

Note3: Because the cable has a connector fitted on the display and scanner side, if it is

necessary to pass cable through a narrow path, fix the scanner-side connector

vertically using vinyl tape before passing cable through the path.

Note4: Lay cable along the ship's hull or wall surface and attach it in place at inter-

vals of about 40 cm.

3.6.1 Interconnecting cable (See Fig.3-8)

•Ensure that the radar is off. Connect the cable to the receptacle labeled "SCANNER" on

the rear panel of the display unit.

‚Next, remove the upper part of the radome from the scanner unit. Avoid bumping it

against the antenna by lifting vertically. (There are three fixing screws.)

ƒRemove the tape fixing the antenna.

„Remove the shield cover located on the astern side. (There are three fixing screws.)

…Remove the cable clamping plate and rubber ring, pass cable through the introduction

opening, put the rubber ring from both ends of it, and clamp the cable to the scanner unit

with screws via the fixing plate. Plug the connector fitted to the cable into the X1 connec-

tor on the PCB.

†Replace the aluminum cover. At this time, attach a cable shield onto a ditch with the

aluminum cover. However, be careful that the cable will not be caught up between the

main unit and cover.

‡Replace the upper part of the radome. Be careful not to bump it against the antenna in

the same way as when removing it. Make sure that the cover is fitted in the correct

direction as shown in Fig.3-7. The upper and lower parts of the radome each have three

markings indicating screw positions. Align the upper and lower positions as you mount

the radome.

Fixing screws

Ship's

heading

Logo seal on

side wall

Fig.3-7 Fitting cover

Antenna

Stern side Shield cover

Cable shield

Radome (bottom)

Fixing plate

Rubber ring

Interconnecting cable

Fix connector on

PCB(X1)

X1 (Connect here)

Radome (bottom)

PCB

Inner shield

Fig.3-8 Fitting interconnecting cable

3.6.2 Grounding wire

Connect grounding wire before connecting power

supply cable. Leakage current is too high.

Connect grounding wire from the grounding terminal on the rear panel of the display unit to

the ship's hull as shown below.

Connect grounding wire from one of the bolts you have attached when installing the scanner

unit to the ship's hull as shown in Fig.3-11. (The crimp terminal and grounding wire are not in-

cluded with the radar equipment.)

SCANNER

POWER

OPTION

Grounding terminal

Grounding wire

Fig.3-10 Grounding display unit to earth

Mount base

Radome(bottom)

Chassis

→

To ship's hull

Crimp terminal

Grounding wire

!WARNING

Fig.3-11 Grounding scanner unit to earth

3.6.3 Power supply cable

Power is fed through a knife switch ( or circuit breaker) and protective fuses, as shown in be-

low.

WARNING: Do not apply over 41.6V to Radar

or Radar may be broken.

Fit the power supply cable (included with your radar) to the receptacle labeled "POWER" on

the rear panel of the display unit. And connect to power supply as followings. (When you do not

connect external equipment, put tape on red and green wire.)

Place the Fuse and connection part where there is no water splash and dry area.

When extend the power supply cable, use a suitable cable as below.

Ship's Power Voltage Cable conductor Cable max. length

cross section

12Vdc 3.5 mm23 m

6.0 mm25 m

24Vdc 2.0 mm26 m

3.5 mm210 m

●3.7 Adjustment

Be sure to operate the following adjustment. If this

is not adjusted properly, the radar picture does not

display true image.

White

Black

Gray

Green

Red

Power supply cable

To display unit

DC+

DC-

Ground

NMEA-

NMEA+ To external

equipment

To power supply

Fig.3-12 Power supply cable

!CAUTION

Generator Switchboard Charger Storage

Battery

12/24V

Main switch panel

(Knife Switch with

Fuses)

Radar Display

Unit

DC voltage

reference points

When you have finished installing the scanner and display units and connecting cables, turn

on the power to the display and scanner units and check to see if they operate normally without

problem. Then make adjustments as detailed below and check to see if the units operate normally

again.

Heading direction offsets about 60 degree from scanner heading when

shipped from factory. "

‚

HEADING DIRECTION" must be carried out when

install the radar.

• TUNING Refer to Adjusting tuning circuit in 5.5.4.5.4

‚ HEADING DIRECTION Refer to Adjusting angle in 5.5.4.5.4

ƒ DISTANCE Refer to Adjusting distance in 5.5.4.5.4

●3.8 Connecting External Equipment to Display Unit

The display unit has two channels of NMEA input. One is standard in power cable. The other

is necessary to connect optional parts (Junction box with OPTION cable).

OPTION connector is located at display’s rear panel for connecting external equipment such

as a GPS, LORAN, or gyro compass. You must have an Junction box with OPTION cable sepa-

rately available from Anritsu. (Refer to CHAPTER 8 (4) External interface.)

Note: SIN/COS and MOB signals cannot be used on Junction Box.

Junction box with OPTION cable (Order No. RZ704A)

SCANNER

POWER

OPTION

OPTION cable

Junction box*note POWER cable

External NMEA equipment

Green ：NMEA-

Red ：NMEA+

To power supply

Other radar,

slave monitor,

External buzzer,

Gyro I/F

Other radar,

slave monitor,

External buzzer,

Gyro I/F,

SIN/COS.

MOB(NMEA out)

Fig.3-13 Connecting external equipment to display unit

!WARNING

●3.9 Countermeasure for Electromagnetic Interference

Anritsu radar provides shields in the units and the inter-unit connection cable. When the ra-

dar, however, is closely installed to radio equipment such as VHF transceiver, UHF transceiver,

etc., or the radar and/or radio equipment are not sufficiently grounded to the hull or ship's earth,

the radar may happen to cause EMI trouble.

Followings are general procedures for reducing EMI due to radars. When installing radars,

refer to them, and also check the radio equipment EMI trouble with operating the radar and radio

equipment.

(1) Installation Place of Radar

The display unit, scanner unit and inter-unit connection cable should be located apart

from the main unit, feeder, antenna coupler and antenna of radio equipment as far as possi-

ble.

Especially, proper installation of the feeder, antenna coupler and antenna of radio equip-

ment is very important to improve EMI trouble.

(2) Laying Power Supply Cables

Following connections A and B are recommended to reduce conduction noise generated

from radar. Connection C should not be used.

Connection A

(Very Good)

Connection B

(Good)

Connection C

(Bad)

(3) Grounding

All equipment should be firmly grounded at the earth nearest hull with copper plates or

braided wires.

Improvement Procedure for EMI

(1) Confirm grounding on the radar and radio equipment. However, some equipment, on

which grounding is not always necessarily, have a possibility of EMI improving when tak-

ing off their grounding. Try to take off grounding.

(2) Confirm power supply cable connections and modify to the connection A or B above.

(3) Try to shift the display unit and inter-unit connection cable of radar to be apart from radio

equipment.

(4) Try to shift the feeder of radio equipment to be apart from each units and the inter-unit

connection cable of radar.

(5) Try to shift the antenna coupler and antenna of radio equipment to be apart from the

scanner unit and inter-unit connection cable of radar.

RADAR

RADIO EQUIPMENT

SHIP'S SUPPLY

RADAR

RADIO EQUIPMENT

SHIP'S SUPPLY

RADAR

RADIO EQUIPMENT

SHIP'S SUPPLY

●3.10 When Discarding Your Radar

When discarding your RA775UA radar, consult Anritsu or its distributor to get information

on precautions to be followed. Tab.3-5 below lists the primary component materials of the

RA775UA radar for your reference.

Tab.3-7 Component Materials

Scanner unit Material Display unit Material

Radome

AES

Front panel

ABS

Chassis

A5052P

Rear panel

ADC12

Base

ADC12

Pedestal

ABS+PC

CHAPTER 4. FUNCTIONS AND NAMES

Function and name of each part

The RA775UA radar consists of a display unit to display video images on a screen and a

scanner unit configured with an antenna to radiate radio waves and other components. The

display unit has on its front panel eighteen(18) push-switch keys and one cursor key that lets

you move a cursor in any desired direction. A combination of these keys allows you to utilize

all functions of your radar, providing a comfortable, easy way to operate.

●

4.1 Key layout

Key No. SET1 SET2 SET3 SET4

1 EBL1 EBL2 RINGS PPI

2 VRM1 VRM2 TUNE PPI/3D

3 VAR RNG FL EBL2 ST PPI/PPI

4 TRACK FL VRM2 ZOOM PPI/NAV

5 TARGET GZ SLEEP ALL PPI

6 SEL WIN OFF-C PICTURE ALL PPI2

7 NEXT NEXT NEXT NEXT

Tab. 5 Function of soft key (Factory setting)

*Every time Next key is pressed, soft key group switches as follows.

Cursor key MENU key ENT key

３

１

RANGE

DOWN

BRILL

AUTO

GAIN

STC

FTC

MOB

POWER

ENTMENU

MOTOR

１：５８

POWER key

Soft keys(* )

ＲＡＤＡＲＯＦＦ

Scanner

Motor fuse

Control knob

RANGE Up key

RANGE Down key

BRILL key( Contrast

Brilliance, keys backlight)

AUTO key

GAIN key

STC key

FTC key

MOB key

SET1

→ SET2 → SET3 → SET4

●

4.2 Rear panel

•

Power supply connector

Use this connector to plug in the power supply cable. Standard NMEA interface

terminal is included in this connector. Refer to Section 3.6 “ Connecting Cables “ and

Section 3.8 “Connecting External Equipment to Display Unit “.

‚

Grounding terminal

Use this terminal to connect grounding wire. Refer to Section 3.6 (3) “Grounding

wire”.

Option connector

Use this connector to connect NMEA, an external monitor, external buzzer and GYRO

I/F. A dedicated cable or dedicated module box is required to connect these pieces of

equipment. Refer to Section 3.8 “Connecting External Equipment to Display Unit”.

„

Scanner connector

Use this connector to plug in the inter-connecting cable to connect the scanner unit.

Refer to 3.6 “Connecting cable “.

●

4.3 Radar screen

（

Single screen

）

SCANNER

POWER

OPTION

Ship’s position

EBL2

VRM2

Indicate soft key

３

１

HU Ｌ

１：５８

ＲＡＤＡＲＯＦＦ

ＥＢＬ１

ＶＲＭ１

ＥＢＬ２

ＶＲＭ２

ＦＬＥＢＬ２

ＦＬ

ＶＲＭ２

ＮＥＸＴ

ＡＨＯＬＤ

ＺＯＯＭ

ＯＦＦ−Ｃ

LAT/LON

35°08．42N

139°02．53E

2 129．8°

2 12．34NM

０．２３ NM

HDG

１２９．０° T

SPD

１２．０ＫＴ

G５９

ＳＡＴ

FAT

ＳＴ１

GZ ＩＮ

TK １５Ｓ

１３４．4°

１２．５ＮＭ

+LAT/LON

35°08．42N

139°02．53E

1 129．8°

1 12．34NM

Tune meter

Picture hold

Zoom

Off-center

Range

Range ring interval

Display mode

Heading angle

Cruising speed

Enlarging echo

Guard zone

Track

Way point

EBL1

VRM1

Pulse width

Course error

Gain

STC

FTC

Cross cursor

Cross cursor position

(LAT/LON or Distance/Bearing）

Bearing scale

•Power supply connector

‚Grounding terminal

„Scanner connector ƒOption connector

●

4.4 Radar screen

（

Dual screen

）

ex） PPI/PPI screen

●

4.5 Radar screen

（

All PPI screen

）

Tune meter

Picture hold

Indicate soft key

SPD １２．８ＫＴ GZ R IN WAY P １３４．４°

HDG １２９．０° GZ L IN １２．５ NM

+MK ３８．４° ＳＴ１ＬＡＴ 35°08．42N 2129.8°

５．２８ TK １５ＳＬＯＮ 139°02．53Ｅ23.62NM

６１．０ HU Ｌ．７５．２５

ＥＢＬ１

ＶＲＭ１

ＥＢＬ２

ＶＲＭ２

ＦＬＥＢＬ２

ＦＬ

ＶＲＭ２

ＮＥＸＴ

ＡＨＯＬＤ

０．２３

XTE ＞＞＞

1 129．8°

1 12．34NM

ＡＴ１

Ｇ５９／ＡＴ

ＳＡＴ／ＡＴ

ＦＡＴ／ＡＴ

Range(Left screen) Range(Right screen)

Range ring interval Range ring interval

(Left screen) (Right screen)

Display mode

Pulse width

Cross cursor

Course error

EBL1

VRM1

＋

Cruising speed Guard zone(Right screen) Way point

Heading angle Guard zone(Left screen)

Cross coursor position Enlarging echo Ship’s position VRM2

(LAT/LON or Distance/Bearing) Track EBL2

AUTO (Left/Right)

Gain (Left/Right)

STC (Left/Right)

FTC (Left/Right)

３

１

HU Ｌ

GZ IN

１：５８

ＲＡＤＡＲＯＦＦ

ＯＦＦ−Ｃ

ＨＯＬＤ

ＺＯＯＭ

Off-center

Picture hold

Zoom

Range

Range ring interval

Display mode

Guard Zone

Pulse width

Cross cursor

●

4.6 Radar screen

（

All PPI /PPI screen

）

●

4.7 Navigation screen

It is necessary that navigation equipment such as a GPS is connected to your radar, this

screen displays the position and cruising speed of your ship, seawater temperature, and other

navigation information.

Note: Heading angle will be displayed "COG" when Course Over Ground data is used.

Note: Cruising speed will be displayed "SOG" when Speed Over Ground data is used.

＞

Indicates starboarding the helm

(right)

＜

Indicates porting the helm (left)

Picture hold

Gurad zone(Right screen)

Guard zone(Left screen)

６１．０ HU Ｌ GZ IN ．７５．２５ GZ IN HOLD

Range(Left screen) Range(Right screen)

Range ring interval Range ring interval

(Left screen) (Right screen)

＋

Display mode

Pulse width

Cross cursor

NAV DISPLAY

WP 134．4°COURSE

12．5

＞＞＞

HDG 129．0°0．23

SPD 12．8

LAT 35°08．42N

LON 139．02．53E

TEMP 20．5°

DEPTH 93．2

’

Way point

Heading angle

Cruising speed

Current position

Sea water temperature

Depth of water

Course error

Deviation from course

Indication mark

0.00 --

＞＜

0.02 --

＞

＜

0.04 --

＞＞

＜＜

0.08 --

＞＞＞

＜＜＜

0.16 --

＞＞＞＞

＜＜＜＜

Tab.6 Indication of deviation from course

CHAPTER 5. OPERATION

Basic operation of radar

The RA775UA radar has several fixed-function keys on the front panel. These functions can be

controlled by simply pressing the key. Also, special functions can be customized to soft-keys by

user-setting. The followings explain the operation of each keys.

5.1 Powering On and Off

(1) Powering On

Press the "POWER" key. Buzzer sounds "pi" and starts the radar system.

Screen contrast and brilliance is set to the level that of the radar system was power off.

(2) Powering off

Keep pressing the "POWER" key more than 3 seconds, then the radar system will power off.

5.2 Adjusting contrast and brilliance of the screen, and key-backlight

(1) Press the "BRILL" key. (Bar indicating contrast, brilliance, and key-backlight appears on

the screen.)

(2) Adjust each items with the control knob. Items can be selected by up-down cursor.

(3) When the adjustment is finished, press either the "BRILL" key or the "ENT" key to exit from

the adjustment screen. (Pressing some other key after adjustment will lead to the function of the

pressed key.)

BRILL ―＞ Control knob (Adjustment of contrast) ――＞ BRILL or ENT

└＞ Up/Down (Selection of brilliance, key-backlight) └-＞Other function key Move to other

functions

.75

.25

BRILLIANCE 50

CONTRAST 50

ST’BY

KEY BACKLIGHT 4

●

5.3 Basic Operations

××× ＝ keys to press

5.3.1 Powering On and Off

POWER

Press "POWER"key to power on.

2 minutes timer and "RADAR OFF" are displayed.

Keep pressing "POWER" key to power off.

Press the "BRIL" key.

BRILL

Control bars are indicated on the screen.

contrast Up/Down Select contrast.

Control knob Adjust contrast with knob.

brilliance Up/Down Select brilliance.

Control knob Adjust brilliance with knob.

key backlight Up/Down Select key backlight.

Control knob Adjust key backlight with

knob.

ENT Press "ENT"key to return.

Radar turn into "ST'BY"mode when 2 minutes timer is finished and

"ST'BY"displayed.

5.3.2 Transmitting

POWER

Press "POWER" key to op-

erate, radar picture appears

on the screen.

Another press "POWER" key,

radar turn to stand-by mode.

Keep pressing "POWER" key

more than 3 seconds, radar turn to power off.

RANG UP

Pressing "RANGE UP" key produces a long-distance range,

RANGE DOWN

"RANGE DOWN" key a short-distance range.

．７５

．２５

ＨＵ

BRILLIAMCE 50

CONTRAST 50

１：５８

RADAR OFF

KEY BACKLIGNT 4

．７５

．２５

ＨＵ

SCREEN

POWER ON

START

CHANGE

RANGE

5.3.3 Adjusting contrast and brilliance of the screen, and key-backlight

××× ＝ keys to press

(1) Press the "BRIL" key. (Bar indicating contrast, brightness, and panel appears on the screen.)

(2) Select contrast, brilliance, or key backlight with the up-down cursor.

(3) Adjust each item with the control knob.

(4) When the adjustment is finished, press either the "BRIL" key or the "ENT" key to exit from

the adjustment screen. (Pressing some other key after adjustment will lead to the function of the

pressed key.)

BRIL ――＞ Control knob (Adjustment of contrast) ――＞ BRIL or ENT

└-＞ Up/Down (Adjustment of brightness, panel)└-＞ Other function key Shift to other func-

tions

5.3.4 Changing Distance Range (RANGE UP, RANGE DOWN)

Pressing "RANGE UP" key produces a long-distance range, and "RANGE DOWN" key a

short-distance range.

RANGE 0.125 0.25 0.5 0.75 1.5 3 6 12 24

Number of rings 222366666

Range ring interval 0.0625 0.125 0.25 0.25 0.25 0.5 1 2 4

5.3.5 Automatic adjustment (AUTO)

AUTO adjusts the GAIN, STC and FTC automatically.

If the "AUTO" key is pressed while GAIN, STC, or FTC are under manual settings, they will all

be switched to AUTO or HBR(HARBOR) mode.

Pressing "AUTO" key, AT1, AT2 and HBR changes alternately. Pressing STC key, all controls return

to manual state.

AT1

Use when find navigation way in much echo such as port area, narrow channel, small

islands area. The control condition is similar to less STC, slightly down GAIN.

AT2

Use at open sea to suppress the sea clutter. The control condition is similar to high

STC, high GAIN.

HBR

Use at in a bay area, inlet, or a harbor. The control condition becomes manual STC by

using the value established HARBOR of ADJUST menu.

Note) Refer to “Setting HARBOR STC circuit(HARBOR)” in section 5.5.4.5.4(7).

Note) When you select HBR mode, FTC will be switched to MANU mode.

* What happens if GAIN, STC, and FTC keys are pressed during AUTO operation?

1) If GAIN key is pressed, Only GAIN enters a manual state.

2) If FTC key is pressed, Only FTC enters manual state.

．７５

．２５

ＨＵ

BRILLIANCE 50

CONTRAST 50

ＳＴ‘ＢＹ

KEY BACKLIGNT 4

3) If STC key is pressed, STC, GAIN, and FTC enter manual state.

5.3.6 Sensitivity adjustment (GAIN)

(1) When the "GAIN" key is pressed, the GAIN dis-

play on the left side of the screen will be reversed

G 35

and the adjustable state will be entered.

(2) When the control knob is turned, the figure will be

shifted within a range of 0 and 99, and the sen-

sitivity can be manually adjusted. When the

"AUTO" key is pressed, all (GAIN, STC and FTC)

will enter an AUTO state.

(3) After the adjustment is finished, press the "GAIN"

key to exit from the adjustment state. If some

other function key is pressed, shift to that function

will take place.

(a) To make adjustments by MANUAL (When the GAIN key is pressed under AUTO operation,

shift to a manual operation will take place.)

GAIN ―＞ Control knob ―＞ GAIN --------------- The adjustment state is ended.

｜ └＞ Other function key --- Shift to other functions

└＞ AUTO └＞ AUTO ---------------- GAIN, STC, and FTC are set at AUTO and the

adjustment state is ended.

(b) To switch from the MANUAL state

AUTO ----------------------------------------------- Set GAIN, STC and FTC at AUTO

5.3.7 Removing sea clutter (STC)

(1) When the "STC" key is pressed, the STC display on the left side of the screen will be re-

versed as

S 35

and the adjustable state will be entered.

(2) When the control knob is turned, the figure will be shifted within a range of 0 and 99, and

the STC can be manually adjusted. When the "AUTO" key is pressed, all (GAIN, STC and

FTC) will enter an AUTO state.

(3) After the adjustment is finished, press the "STC" key to exit from the adjustment state. If

some other function key is pressed, shift to that function will take place.

(a) To make adjustments by MANUAL (When the STC key is pressed under AUTO operation, shift

to a manual operation will take place.)

STC ―＞ Control knob ―＞ STC ----------------- The adjustment state is ended.

｜ └＞ Other function key ----- Shift to other functions

└＞ AUTO └＞ AUTO ----------------- STC, GAIN, and FTC are set at AUTO and the

adjustment state is ended.

．７５

．２５

ＨＵ

G 50

ＳＴ‘Ｂ

NOTE) When you select MANU mode, GAIN and FTC will be switched to MANU mode, too.

(b) To switch from the MANUAL state

AUTO ----------------------------------------------- Set STC, GAIN and FTC at AUTO

5.3.8 Removing rain and snow clutter (FTC)

(1) When the "FTC" key is pressed, the FTC display

on the left side of the screen will be reversed as

500

and the adjustable state will be entered.

(2) When the control knob is turned, the figure will be

shifted within a range of 0 and 99, and the sen-

sitivity can be manually adjusted. When the

"AUTO" key is pressed, all (GAIN, STC and FTC)

will enter an AUTO state.

(3) After the adjustment is finished, press the "FTC"

key to exit from the adjustment state. If some

other function key is pressed, shift to that function

will take place.

(a) To make adjustments by MANUAL (When the FTC key is pressed under AUTO operation, shift

to a manual operation will take place.)

FTC ―＞ Control knob ―＞ FTC --------------- The adjustment state is ended.

｜ └＞ Other function key --- Shift to other functions

└＞ AUTO └＞ AUTO ---------------- GAIN, STC, and FTC are set at AUTO and the

adjustment state is ended.

(b) To switch from the MANUAL state

AUTO ----------------------------------------------- Set GAIN, STC and FTC at AUTO

5.3.9 Man Over Board (MOB)

Pressing the MOB key will send the own ship's position data to the external equipment

through NMEA port with "WPL" format. There is no change on the screen.

To check the MOB position data, select "MOB" from the "WINDOW" menu in the "SETUP".

The position of MOB and current position will be displayed on the screen. If press the "MOB" key

while watching the MOB screen, MOB data will be cleared and return to previous screen. If press

other keys, MOB data will be remained and return to previous screen.

．７５

．２５

ＨＵ

F 50

ＳＴ‘Ｂ

●

5.4 Functions of Soft Keys

××× ＝ keys to press

･

Outline of soft keys

Any function can be optionally allocated to the key upon which numbers 1-7 are indicated. A

maximum of 4 groups of functions can be allocated to each soft key, and switching between those

functions is conducted by the "NEXT" key.

5.4.1 Bearing measurement (EBL1)

(a) Bearing measurement by EBL1

(1) When "EBL1" key is pressed, electric bearing line (EBL1) appears and the angle from the

direction of the ship’s head which is set at 0 °will appear in a reverse display at the lower left of

the screen(Note).

(2) Use the control knob to place the direction cursor on the target, and read the angle.

(3) After the setting

i) If "EBL1" key is pressed, the setting is completed.

ii) If "other function" key is pressed, the function will be shifted to that of the pressed key with

the setting condition still in effect. note: 1 xxx.x ° indicates EBL1.

EBL1 ―＞ Control knob ―＞ EBL1 EBL1 is displayed and the process is finished.

｜└＞ Other function key EBL1 is displayed and the function is shifted.

└-＞ EBL1 EBL1 is turned off.(b)

(b) To turn off the EBL1

When the "EBL1" key is pressed twice, EBL1 disappears. (EBL1 OFF)

Note: Please refer to "5.5.1.1 Bearing measurement (EBL1)".

5.4.2 Bearing measurement (EBL2)

The operation is the same as EBL1, please refer to EBL1 operation. The "EBL2" will appear in

a reverse display at the lower right of the screen

5.4.3 Distance measurement (VRM1)

(a) Distance measurement by VRM1

(1) When "VRM1" key is pressed, variable range maker (VRM1) appears and the distance in a

reverse display appears at the lower left of the screen.

(2) Place the marker on the front edge of the target with the control knob and read the distance.

(3) After the setting

i) If "VRM1" key is pressed, the setting is completed.

ii) If "other function" key is pressed, the function will be shifted to that of the pressed key with the

setting condition still in effect. note: 1 xxx.x NM indicates VRM1.

VRM1 ―＞ Control knob ―＞ VRM1 VRM1 is displayed and the process is finished.

｜└＞ Other function key VRM1 is displayed and the function is shifted.

└＞ VRM1 VRM1 is turned off.(b)

(b) To turn off the VRM1

When the "VRM1" key is pressed twice, VRM1 disappears. (VRM1 OFF)

Note: Please refer to "5.5.1.2 Determining the distance (VRM1)".

5.4.4 Distance measurement (VRM2)

The operation is the same as VRM1, please refer to VRM1 operation. The "VRM2" will appear

in a reverse display at the lower right of the screen

5.4.5 Measuring the angle between two points (FL EBL2)

Note: VRM2 and EBL2 do not follow the OFF-C function while floating.

Note: Please refer to "5.5.1.5 Measuring the distance or angle between two points ( FL EBL2,

FL VRM2 )".

(a) Setting a reference point for measurement of the angle.

(1) Press "FL EBL2" key. “SET START POINT” is displayed and a small cross mark appears.

FL EBL2 −＞ FL EBL2 is turned ON and

(Select FL EBL2) the small cross mark appears.

(2) Use the left-right and up-down cursor keys to place the small cross mark on one of the two

echoes whose angle will be measured, and press the "ENT" key.

Up/Down &Left/Right −＞ ---- ENT Criterion of the reference point is set.

(Place the cross cursor on an echo)

(b). Measuring

Perform the operations in the above mentioned and "measuring the angle(EBL2)", and place

the EBL2 on another echo.

EBL2 is displayed on the screen based on the placed fixed cross cursor.

" 2 xxx.x°" which is displayed at the lower right will be the angle between the two points.

5.4.6 Measuring the distance between two points (FL VRM2)

Note: Please refer to "5.5.1.5 Measuring the distance or angle between two points ( FL EBL2,

FL VRM2 )".

(a) Setting a reference point for measurement of the angle.

(1) Press "FL VRM2" key. “SET START POINT” is displayed and a small cross mark appears.

FL VRM2 −＞ FL VRM2 is turned ON and

(Select FL VRM2) the small cross mark appears.

(2) Use the left-right and up-down cursor keys to place the small cross mark on one of the two

echoes whose angle will be measured, and press the "ENT" key.

Up/Down &Left/Right −＞ ---- ENT Criterion of the reference point is set.

(Place the cross cursor on an echo)

(b) Measuring

Perform the operations in the above mentioned and "measuring the distance(VRM2)", and

place the VRM2 on another echo.

VRM2 is displayed on the screen based on the placed fixed cross cursor.

" 2 xx. xNM" which is displayed at the lower right will be the distance between the two

points.

5.4.7 Changing the group of Soft Keys (NEXT)

Any function can be optionally allocated to the key upon which numbers 1-7 are indicated. A

maximum of 4 groups of functions can be allocated to each soft key, and switching between those

functions is conducted by the "NEXT" key.

The "NEXT" key switches between allocated function groups on the soft key which numbers 1-7

are indicated.

Every time pressing the "NEXT" key, function groups changes to another groups included pressing

"NEXT" key. The function groups can also be changed at the "KEY ASSIGNMENT" function in the

"CUSTOM" menu of the "SETUP" with left-right cursor key.

Operation

Soft Key Setting Example

SET1 SET2 SET3 SET4

The function can be changed at the "KEY ASSIGNMENT" function in the

"CUSTOM" menu of the "SETUP".

7 7 7

NEXT NEXT NEXT 7

6 6 6

EBL1

VAR RNG

TRACK

TARGET

VRM1

EBL2

FL EBL2

VRM2

RINGS

ZOOM

SLEEP

TUNE

SEL WIN OFF-C PICTURE

7 7 6

NEXT NEXT NEXT

PPI

PPI/PPI

PPI/NAV

ALL PPI

PPI/3D

ALL PPI2

5.4.8 Erasing heading maker temporarily (HDG OFF)

Press the “HDG OFF” key. The heading maker is not displayed as long as you hold it down.

5.4.9 Using parallel cursors (///CSR)

Press the “///CSR” key. Parallel cursors will appear on the screen. As you move EBL, the parallel

cursors also move.

To cancel the "///CSR" function, press "///CSR" key once more.

Note: Please refer to "5.5.1.8 Using parallel cursors (///CSR)".

5.4.10 Establishment of the indication of the RANGE RINGS (RINGS)

Press the “RINGS” key. Range Rings will appear on the screen. To cancel the "RINGS" function,

press "RINGS" key once more.

Note: Please refer to "5.5.1.9 Establishment of the indication of the RANGE RINGS (RINGS)".

5.4.11 ON/OFF of variable range function (VAR RNG)

Usually the range changes in steps as 0.5--0.75--1.5--3.0--....., but using this function will enable a

consecutive change such as 0.5--0.6--0.7--0.8--..... .

Press the “VAR RNG” key. The VAR RNG function becomes valid and VAR will be displayed

at the upper left of the screen (beside MODE). To cancel the "VAR RNG" function, press "VAR RNG"

key once more.

The range changes continuously with the up-down cursor while the VAR RNG function is on, and

it changes in steps with the "RANGE UP" or "RANGE DOWN" keys.

If pressing other keys, return to the normal state from continuously range change state.

5.4.12 Changing display modes (MODE)

(1) Select MODE from the pull-down display items using the up-down cursor keys, and press the

"ENT" key.

(2) When the HU/HS/NU/CU/TM sign is displayed beside the MODE item, select display mode with

the up-down cursor keys and press the "ENT" key.

(3) The setting will be completed when the "ENT" key is pressed after the selection. (NOTE1,2)

Press the "MODE" key, the display mode will change on every pressing to HU, HS, NU, CU, TM in

order. The mode select at the upper of the screen is indicated. However, a setting will be needed for the

ship’s speed if TM is selected. Also, a heading or a course information is necessary for NU, CU and TM.

note: TM is valid only on PPI screen. The mode will change to NU on the other screen automatically.

Note: Please refer to "5.5.2.1 Changing display mode (MODE)".

5.4.13 Guard Zone (GZ)

A function that sets a guard zone of any distance and any angle range, creating alarm tone when

either echoes above a certain level exist (IN MODE) or no echoes exist(OUT MODE).

When GZ is operated with soft keys, guard zone settings and ON/OFF settings can be conducted,

but the mode (IN or OUT) is to be set in the menu.

Note: Please refer to "5.5.2.2 Guard Zone (GZ)".

(1) When the "GZ" key is pressed, the present mode setting will be displayed on the left side of the

screen as GZ IN. A small cross cursor for setting the guard zone will be displayed at the screen

center while "SET CENTER POINT" is displayed at the bottom, activating a guard zone setting

state.

(2) Use the up-down/left-right cursor keys to move the cross cursor to the center of the warning zone

to be set, and press the "ENT" key.

(3) From the cross cursor position set in (2) above as the center, expand the guard zone in the

direction of the distance with the up cursor key and in the direction of the angle with the right

cursor key, thus making the form of a fan. To make the warning zone smaller, operate the down

cursor key (in the direction of the distance) and the left cursor key (in the direction of the angle).

(4) After the setting the guard zone, finish by pressing the "ENT" key.

Press the GZ key twice to cancel the guard zone function.

GZ −＞ Up/Down &Left/Right −＞ ENT −＞ Up/Down &Left/Right −＞ ENT Setting completed

｜(Setting the center of GZ) (Setting the scope of GZ)

└＞ GZ ---------------------------------------------------------------------Canceling GZ

・

Stop the alarm tone

Press the "MENU" key or "ENT" key during the alram tone sounds, alarm tone will stop.

note: Set the mode (IN or OUT) at the "GZ MODE" of the "PRESET2" function in the "CUSTOM"

menu of the "SETUP"

Set the alarm level (IN or OUT) at the "GZ LVL" of the "PRESET2" function in the "CUSTOM"

menu of the "SETUP"

5.4.14 Off Center (OFF-C)

Displaying the location specified by the cross cursor as the ship's location

Note: Please refer to "5.5.2.3 Shifting display in specific direction (OFF-C)".

(1) When the "OFF-C" key is pressed, OFF-C is displayed at the upper right and "SET OFF CENTER

POINT" at the bottom of the screen, and setting is ready to be entered.

(2) Move the cross cursor with the cursor keys to move the ship to the intended location, and press

the "ENT" key. The ship's location will be displayed as the cursor's location. OFF-C is displayed

at the upper right , which indicates that the "OFF-C" state is entered.

(3) To cancel "OFF-C" function, press the "OFF-C" key.

(a) To conduct the setting

OFF-C −＞ Up/Down & Left/Right −＞ ENT --------Conduct Off Center to exit the adjustment state.

Note: VRM2 and EBL2 do not follow the OFF-C function while floating.

The function operate on PPI screen only.

(b) To cancel the setting

OFF-C -----------------------------------The "OFF-C" display at the upper right disappears and function

returns to the ordinary state from the Off Center state.

5.4.15 Setting of the SLEEP function(SLEEP)

This function sends a 30-second-transmissions during pre-fixed hours. After a transmission, a

power-saving mode is entered with the screen in ST'BY state (the scanner-OFF state) and the LCD

backlight turned off. This action is repeatedly executed.

Usage example, set a guard zone and have the warning signal automatically confirmed every

prefixed period.

Press the "SLEEP" key. Every pressing the key, "SLEEP" function will be set as 5-minutes, 10-

minutes, 15-minutes, or off.

When a transmission is conducted after setting a SLEEP mode, a ST'BY state is entered and the

backlight turns off after a 30-second-transmission. (Power-saving mode). Two minutes before the

fixed time the backlight turns on and the 2-minute timer starts. Then, at the fixed time another 30-

second-transmission begins. This series of actions are repeated. If any one key is pressed during the

course of this action, the SLEEP function will be canceled.

Note: Please refer to "5.5.2.4 Setting of the SLEEP function(SLEEP)".

(1) Setting procedure

SLEEP -＞(Select 5min.) → ENT →POWER -＞ 30-second-transmission every 5 min.

└ transmission ON

SLEEP -＞(Select 10min.) → ENT → POWER -＞ 30-second-transmission every 10 min.

└ transmission ON

SLEEP -＞(Select 15min.) → ENT → POWER -＞ 30-second-transmission every 15 min.

└ transmission ON

SLEEP -＞(Select OFF) --------------------------------------- SLEEP function is turned OFF

Setting completed

5.4.16 Tuning adjustment (TUNE)

(1) When the "TUNE" key is pressed, the TUNE display on the upper-right side of the screen

will be reversed as

and the adjustable state will be entered.

(2) When the control knob is turned, the figure will be shifted within a range of 0 and 99,

and the receiver tuning can be manually adjusted.

(3) After the adjustment is finished, press the "ENT" key to exit from the adjustment state.

If some other function key is pressed, shift to that function will take place.

TUNE ―＞ Control knob ―＞ TUNE or ENT ------- The adjustment state is ended.

(tuning adjustment) └＞ Other function key --- Shift to other functions

Note: Use the "MENU" to return auto-tuning state.

Note: Please refer to "5.5.3.4 Adjusting receiver tuning (TUNE)".

5.4.17 Echo expansion (ST)

Expanding the echo to the direction of the distance.

When the "ST" key is pressed, "ST1" is displayed on the left side of the screen and the state of echo

expansion is entered. This changes the picture to display echoes expanding in the direction of the

distance. Two types of echo expansion exist, which are alternated as follows , every time this key is

pressed.

Note: Please refer to "5.5.3.5 Echo expansion (ST)".

ST1 → ST2 → OFF

（Expansion rate ST1 < ST2 ）

Note: The "OFF" state is not displayed on the screen and the "ST2" display disappears.

5.4.18 Displaying locus of target (TRACK)

When the "TRACK" key is pressed, "TK 15SEC" is displayed on the left side of the screen and track

mode is entered. 15S indicates the length of the track, and displays a maximum of 15-second-long

sailing track.

Note: Please refer to "5.5.3.6 Displaying locus of target (TRACK)".

Every time this key is pressed, the course length switches as follows.

１５ sec → ３０ sec → １ min → ３ min → ６ min → ＣＯＮＴ → ＯＦＦ

Note: The "OFF" state will not displayed on the screen and the "TK xx " display will disappear.

5.4.19 Enlarging selected areas (ZOOM)

The video image centering around the cross cursor is doubled as it is displayed on the screen.

Press the "ZOOM" key to "ZOOM" ON. A small cross cursor for setting and "SET ZOOM POINT"

are displayed at the screen center and at the bottom respectively, and the magnification point is to be

set. Use cursor keys to move the cross cursor to the point to be magnified, press the "ENT" key and

the setting is completed. The area around the cross cursor is displayed in 2x magnification, with

blinking "ZOOM" displayed at the screen upper right, indicating that a ZOOM display is being

conducted.

To cancel the ZOOM function, press the "ZOOM" key again or change the range scale.

Note: Please refer to "5.5.3.7 Enlarging selected areas (ZOOM)".

ZOOM −＞ Up/Down &Left/Right −＞ ENT ZOOM Ssetting

(Move cross cursor)

└＞ (Select OFF) −＞ ZOOM --------- ZOOM caceled

Note1: VRM2 and EBL2 do not follow the ZOOM function during a floating state.

Note2: Normal screen returns when you change the range scale.

Note3: ZOOM function is unusable in 3D/PPI screen.

Note4: ZOOM function is unusable in OFF-C.

Note5: Center of ZOOM can be set any desired position within the set range.

5.4.20 Increasing sensitivity (S/L)

The pulse width is automatically changed as you change the range. However, if you want to

increase sensitivity, you can choose sensitivity from two pulse lengths. The short pulse (SHORT)

gives you sharp images with high distance resolution. The long pulse (LONG) provides high

sensitivity and shows targets in large size for easy identification although distance resolution is

reduced.

Press the "S/L" key to select the Pulse length(LONG or SHORT). The pulse length changes

L(Long) and S(Short) alternately.

Note: Please refer to "5.5.3.8 Increasing sensitivity (S/L)".

S/L −＞ (Select SHORT) −＞ Set to short pulse

└＞ or (Select LONG) −＞ Set to long pulse

5.4.21 Switching the screen (SEL WIN)

Switching to the desired screen for activation on a 2-screen display(PPI+PPI).

When change the range, or adjust the GAIN, STC, or FTC, or control the VRM, EBL, select the desired

screen first.

ex.) To be used for switching the range on the PPI+PPI screen.

When the "SEL WIN" key is pressed, the range of the selected screen will be displayed in reverse,

indicating that the screen is active.

Note: Please refer to "5.5.4.2 Switching screens on PPI/PPI screen ( SEL WIN )".

SEL WIN −＞ (Select right screen) −＞ Right screen activated

└＞ or (Select left screen) −＞ Left screen activated

If VRM1 is controlled on the screen that is oposit from current VRM1 displayed screen, VRM1 is

moved and displayed to activated screen. The EBL1, EBL2, and VRM2 is the same manner.

5.4.22 Reversing the screen (PICTURE)

The LCD display is affected by weather, temperature, and day / night environment conditions. In

some cases, you may find the LCD display is easier to view when the entire screen is reversed.

Press the "PICTURE " key, a normal display will appear if reverse display has been selected, and a

reverse display if normal display selected.

Note: Please refer to "5.5.4.3 Reversing the screen (PICTURE)".

5.4.23 Change to PPI screen ( PPI )

Press the "PPI" key, the screen will change to PPI

screen.

Use to change the screen from other modes to PPI.

5.4.24 Change to SEMI3D/PPI screen ( SEMI3D )

Press the "SEMI3D" key, the screen will change to

SEMI3D/PPI screen.

Use to change the screen from other modes to

SEMI3D/PPI.

Note: All controls, such as EBLs, VRMs effects both screen.

The ZOOM, OFF-C, FL EBL2, and FL VRM2 could not

be used on this mode. The "SEMI3D" screen displays

the center as ship's heading always.

5.4.25 Change to PPI/PPI screen ( PPI/PPI )

Press the "PPI/PPI" key, the screen will change to

PPI/PPI screen. Use to change the screen from other

modes to PPI/PPI.

Note:

(1) The radar picture is refreshed with two scanning

interval for each screen. Right screen picture is holded

during refreshing left screen, left screen holded during

refreshing right screen. When your ship navigates in

high speed, use PPI screen to get fast refreshing picture.

LEFT screen /―――/・・・・・・/―――/・・・・・・/―――/・・・・・・ｔime→

RIGHT screen ・・・・・・ /―――/・・・・・・/―――/・・・・・・/―――/

(2) The ZOOM, OFF-C, FL EBL2, and FL VRM2 could not be used on this mode.

(3) The range, GAIN, STC, FTC, GZ can be used independently for selected window with "SEL

．７５

．２５

ＨＵ

＋

PPI screen

．７５．２５ＨＵＳ

＋

280 320 000 040 080

SEMI3D/PPI screen

．７５

．２５ＨＵＳ

２４

６

＋

Ｇ 55/35

Ｓ 35/AT

Ｆ 35/AT

ＰＰＩ／ＰＰ I screen

refreshing radar picture

holding previous picture

WIN".

Selected window is that the range displayed in reverse character. Please refer to "SEL WIN".

(4) The cross cursor can be controlled on selected window.

5.4.26 Change to PPI/NAV screen ( PPI/NAV )

Press the "PPI/NAV" key, the screen will change to

PPI/NAV screen.

Use to change the screen from other modes to

PPI/NAV.

Note:

The ZOOM, OFF-C, FL EBL2, and FL VRM2 could not

be used on this mode.

5.4.27 Change to ALL PPI screen ( ALL PPI )

Press the "ALL PPI" key, the screen will change to ALL

PPI screen.

Use to change the screen from other modes to ALL PPI.

Note:

(1) The range, rings interval, display mode are displayed on the

upper left of the screen.

(2) Return to PPI screen mode pressing a key except MENU,

range UP or DOWN, or POWER key.

5.4.28 Change to ALL PPI/PPI screen ( ALL PPI2 )

Press the "ALL PPI2" key, the screen will change to

ALL PPI/PPI screen.

Use to change the screen from other modes to ALL

PPI/PPI.

Note:

(1) The range, rings interval, display mode are displayed on

the upper left of each screen.

(2) Return to PPI/PPI screen mode pressing a key except

MENU, range UP or DOWN, or POWER key.

(3) The radar picture is refreshed with two scanning

interval for each screen. Right screen picture is holded

during refreshing left screen, left screen holded during refreshing right screen. When your

ship navigates in high speed, use PPI screen to get fast refreshing picture.

．７５．２５ＨＵＳ

＋

NAV ＤＩＳＰＬＡＹ

WAY P １２３．４°

６．８ＮＭ

COURSE ２．３８ＮＭ

XTE ＜＜＜

HDG ２６７．３°Ｔ

SPD １２．８ＫＴ

TEMP ２０．８° Ｃ

DEPTH ５８．３ M

LAT/LON

３４°０８．２２Ｎ

１３８°０２．５３Ｅ

PPI/NAV screen

．７５

．２５

ＨＵ

＋

ALL PPI screen

．７５

．２５ＨＵＳ

．２５

．１２５

＋

ALL PPI/PPI screen

●

5.5 MENU Operation

･List of MENU

List of Main Menu

MARK

(MAIN-MENU)

NAV

(MAIN-MENU)

ECHO

(MAIN-MENU)

SETUP

(MAIN-MENU)

EBL1 ON/OFF GAIN AUTO/MAN

VRM1 ON/OFF

MODE HU/HS/NU/CU/TM

（MANU/NMEA）STC AUTO/MAN/HARBOR

EBL2 ON/OFF GZ ON/OFF FTC AUTO/MAN

WINDOW PPI/SEMI3D+PPI/

PPI+PPI/PPI+NAV/

ALL PPI/ALL PPI+PPI/MOB

VRM2 ON/OFF OFF-C ON/OFF TUNE AUTO/MAN SEL WIN

FL EBL2 ON/OFF ST OFF/ST1/ST2 PICTURE DAY/NIGHT

FL VRM2 ON/OFF SLEEP OFF/5min/10min/

15min SYSTEM CHECK

HDG OFF OFF TRACK OFF/15SEC/30SEC/

1MIN/3MIN/6MIN/CONT

///CSR ON/OFF ZOOM ON/OFF

RINGS ON/OFF SL SHORT/LONG

VAR RNG ON/OFF

TARGET

CUSTOM KEY ASSIGNMENT

PRESET1 (SUB-MENU)

PRESET2 (SUB-MENU)

ADJUST (SUB-MENU)

+MK LINE ON/OFF

List of Custom Menu

PRESET1 (SUB-MENU) PRESET2 (SUB-MENU)

HM FLSH ON/OFF GZ LEVEL 1∼7

STERN M ON/OFF GZ MODE IN/OUT

NORTH M ON/OFF HOLD ON/OFF

ST’BY NAVI/NOR DISPLAY RDR/MONI/NAV

BUZ VOL OFF/LOW/HIGH EXT BUZ OFF / CONT / INT

RM UNIT NM / KM / SM IN P/R 1080/1024/2048/4096/360

DEPTH M / FT / FM OUT P/R 1080/1024/2048/4096/360

TEMP °C / F DEMO ON / OFF

EBL BRG REL / TRUE / MAG IR OFF / IR1 / IR2

WP BRG TRUE / MAG SPD SET NMEA / MANU 0.0 KT

HEAD INPUT NMEA / SIN・COS /12BIT / 10BIT LANGUAGE 15 countries

HEAD TRUE / MAG

+MK MODE DIST・BRG / LAT・LON

P TABLE 0 ∼ 2

ADJUST (SUB-MENU)

TIMING ADJ

HEAD ADJ

TUNING CAL.

ANTENNA 1∼9

AUTO GAIN 1∼30

AUTO STC 1∼16

HARBOR 1∼16

ＳＴ‘Ｂ

．７５

．２５

ＨＵ

ＳＴＣ

ＦＴＣ

ＴＵＮＥ

ＳＴ

TRACK

ZOOM

S/L

▼▼▼▼▼▼▼

ＭＡＲＫＮＡＶＥＣＨＯＳＥＴＵ

Ｐ

ＥＣＨ

Ｏ

ＧＡＩＮ

▼

MAN

AUTO

MAIN-MENU

SUB-MENU

5.5.1 Mark Menu

××× ＝ keys to press

Setting for markers and cursors

･

Common operations for the MARK menu

(Up to the point when "MARK" menu is selected from the main menu)

Press the "MENU" key and select "MARK" from the displayed 4 main menus using the left-right

cursor. (The contents of the selected MENU will appear on a pull-down display in accordance with the

movement of the left-right cursor.)

MENU ――＞ Left/Right

(Select MARK)

Further explanation about the MARK menu will be conducted on the assumption that this "common

operation for the MARK menu" has already been completed.

5.5.1.1 Bearing measurement (EBL1)

(1) Select EBL1 from the pull-down display items using the up-down cursor key, and press the "ENT"

key.

(2) When the ON/OFF sign is displayed beside the EBL1 item, select ON with the up-down cursor keys

and press the "ENT" key.

(3) When the "ENT" key is pressed, electric bearing line

(EBL1) appears and the angle from the direction of the

ship’s head which is set at 0 degree will appear in a

reverse display at the lower left of the screen.

(4) Place the marker on the center of the target with the

control knob and read the bearing. Then, the display

setting for EBL1 will be completed either (a)with the

EBL1 display still on the screen if the "ENT" key is

pressed, or (b)without the EBL1 display if the "MENU"

key is pressed. (c)Pressing another function key will

lead to the function of that key with the EBL1 display

still on the screen.

Note: 1 ×××．×°indicates EBL1.

Up/Down −＞ ENT −＞ Up/Down −＞ ENT −＞ Control knob −＞ ENT (a)

(Select EBL1) (Select ON) (EBL1 operation) └＞ MENU (b)

└＞ Other function key (c)

Note: The displayed EBL angle is relative to heading or true to north, depends on the setting of

"EBL BRG" in the "SETUP" menu.

ＭＡＲＫ

ＥＢＬ１

ＶＲＭ１

ＥＢＬ２

．７５

．２５

ＨＵＮＡＶＥＣＨＯＳＥＴＵＰ

ＭＡＲＫ

▼▼▼

▼

０．２３

Ａ

．７５

．２５

ＨＵ

1 0.0°

ＯＦＦ

ＯＮ

5.5.1.2 Determining the distance (VRM1)

(1) Select VRM1 from the pull-down display items using

the up-down cursor key, and press either the "ENT"

key.

(2) When the ON/OFF sign is displayed beside the VRM1

item, select ON with the up-down cursor keys and

press the "ENT" key.

(3) When the "ENT" key is pressed, the variable range

marker1 (VRM1) and the distance in a reverse display

appears at the lower left of the screen (See Note), and

the display is set for VRM1.

(4) Place the marker on the front edge of the target with

the control knob and read the distance. Then, the

display setting for VRM1 will be completed either

(a)with the VRM1 display still on the screen if the

"ENT" key is pressed, or (b)without the VRM1 display

if the "MENU" key is pressed. (c)Pressing another

function key will lead to the function of that key with

the VRM1 display still on the screen.

Up/Down −＞ ENT −＞ Up/Down −＞ ENT −＞ Control knob −＞ ENT (a)

(Select VRM1) (Select ON) (VRM1 operation) └＞ MENU (b)

└＞ Other function key (c)

Note: 1 ××．××NM indicates VRM1.

5.5.1.3 Bearing measurement (EBL2)

Refer to the section “Bearing measurement (EBL1)”.

The "EBL2" will appear in a reverse display at the lower right of the screen.

Note: 2 ×××．×°indicates EBL2.

5.5.1.4 Determining the distance (VRM2)

Refer to the section “Determining the distance (VRM1)”.

The "VRM2" will appear in a reverse display at the lower right of the screen.

Note: 2 ××．××NM indicates VRM2.

5.5.1.5 Measuring the distance or angle between two points ( FL EBL2, FL VRM2 )

Determining the distance (VRM2)

(a) Preparation for the measurement

(1) Use the up-down cursor keys to select FL VRM2 from among the pull-down display items, and

press the "ENT" key.

(2) Use the up-down cursor keys to select ON from the ON/OFF display beside the FL VRM2 items,

and press the "ENT" key. “SET START POINT” is displayed and a small cross mark appears.

(Once this is set, the "ON" state continues unless changes are made.)

Up/Down −＞ ENT −＞ Up/Down −＞ ENT ------------------ FL VRM2 is turned ON and

(Select FL VRM2) (Select ON) the small cross mark appears.

．７５

．２５

ＨＵ

1 0.00NM

(b) Setting a reference point for measurement of the distance

Use the left-right and up-down cursor keys to place the small cross mark on one of the two echoes

whose distance will be measured, and press the "ENT" key.

Up/Down &Left/Right −＞ ENT ------------ Criterion of the reference point is set.

(Place the cross cursor on an echo)

Perform the operations in the above mentioned "Common operation for the MARK menu" and

"measuring the distance(VRM2)", and place the VRM2 on another echo.

VRM2 is displayed on the screen around the placed fixed cross cursor.

" 2 xx. xNM" which is displayed at the lower right will be the distance between the two points.

Note: EBL2 and VRM2 are not follow to "ZOOM" and "OFF-C" function.

5.5.1.6 Measuring the angle between two points (FL EBL2)

(a) Preparation for the measurement

(1) Use the up-down cursor keys to select FL EBL2 from among the pull-down display items, and

press the "ENT" key.

(2) Use the up-down cursor keys to select ON from the ON/OFF display beside the FL EBL2 items,

and press the "ENT" key. “SET START POINT” is displayed and a small cross mark appears.

(Once this is set, the "ON" state continues unless changes are made.)

Up/Down −＞ ENT −＞ Up/Down −＞ ENT ------------------ FL EBL2 is turned ON and

(Select FL EBL2) (Select ON) the small cross mark appears.

(b) Setting a reference point for measurement of the angle.

Use the left-right and up-down cursor keys to place the small cross mark on one of the two echoes

whose angle will be measured, and press the "ENT" key.

Up/Down &Left/Right −＞ ENT -- Criterion of the reference point is set.

(Place the cross cursor on an echo)

Perform the operations in the above mentioned "Common operation for the MARK menu" and

"measuring the distance(EBL2)", and place the EBL2 on another echo.

EBL2 is displayed on the screen based on the placed fixed cross cursor.

．７

５

．２５

ＨＵ

2 0.72

place the VRM2

on another echo

center of

VRM2

SET START POINT

．７

５

．２５

ＨＵ

measure the distance

between two targets

small cross mark

cross mark

FL VRM2 indication of VRM2

" 2 xx. xx°" which is displayed at the lower right will be the angle between the two points.

Note: The displayed EBL angle is relative to heading or true to north, depends on the setting of

"EBL BRG" in the "SETUP" menu.

5.5.1.7 Erasing heading maker temporarily (HDG OFF)

(1) Use the up-down cursor key to select HDG OFF from

among the pulled down and displayed items.

(2) Press the “ENT” key. The heading maker is not

displayed as long as you hold it down.

Up/Down −＞ ENT ---------- The heading maker is not displayed as long as you hold “ENT” key down.

(Select HDG OFF)

5.5.1.8 Using parallel cursors (///CSR)

Normally EBL is used to measure the exact bearing from the position of your ship to a target.

However, you can also use parallel cursors.

(1) Use the up-down cursor key to select ///CSR from among

the pull-down and display items, and press the “ENT”

key.(ON/OFF display beside the ///CSR item)

(2) Use the up-down cursor key to select ON .

(3) Press the “ENT” key. Parallel cursors will appear on the

screen. As you move EBL, the parallel cursors also move.

To cancel the ///CSR function, either select OFF in (2).

Up/Down −＞ ENT −＞ Up/Down (Select ON) −＞ ENT -----------------Parallel cursor appears

(Select ///CSR) └＞ Up/Down (Select OFF)−＞ ENT -------------Parallel cursor non-appears

Note: Interval of ///CSR same as fixed range maker.

///CSR moves with EBL1.

．７

５

．２５

ＨＵ

．７５

．２５

ＨＵ

Not displayed while ENT key

is held down.

2 20.３°

FL EBL2

SET START POINT

．７

５

．２５

ＨＵ

Origin of EBL2

measure the angle between two points

indication of

EBL2

small cross mark

cross mark

．７５

．２５

ＨＵ

EBL1

Parallel cursor

5.5.1.9 Establishment of the indication of the RANGE RINGS (RINGS)

(1) Use the up-down cursor key to select RINGS from among the pull-down and display items, and press

the “ENT” key.(ON/OFF displayed beside the RINGS item)

(2) Use the up-down key to select ON or OFF and press the “ENT” key

Select ON Range Rings ON

Select OFF Range rings OFF

Up/Down −＞ ENT −＞ Up/Down (Select ON) −＞ ENT ------------------Range rings appears

(Select RINGS) └＞ Up/Down (Select OFF)−＞ ENT -------------- Range rings non-appears

･Number of range rings and range interval

Range 0.125 0.25 0.5 0.75 1.5 3 6 12 24

Number of Rings 222366666

Interval 0.0625 0.125 0.25 0.25 0.25 0.5 1 2 4

5.5.1.10 Variable range function ( VAR RNG )

Usually the range changes in steps as 0.5--0.75--1.5--3.0--....., but using this function will enable a

consecutive change such as 0.5--0.6--0.7--0.8--..... .

(1) Use the up-down cursor keys to select VAR RNG from among the pulled down and displayed items,

and press the "ENT" key.

(2) When ON is selected with the up-down cursor key from the ON/OFF display beside the VAR RNG

item, and the "ENT" key is pressed, the VAR RNG function becomes valid and VAR will be

displayed at the upper left of the screen (beside MODE).

Setting procedure

Up/Down −＞ ENT −＞ Up/Down (Select ON) −＞ ENT VAR RNG function is turned ON

(Select VAR RNG) └＞ Up/Down (Select OFF) −＞ ENT VAR RNG function is turned OFF

(3) The range changes continuously with pressing the up-down cursor while the VAR RNG function is

on, and it changes in steps with the "RANGE UP" or "RANGE DOWN" keys.

Method of use

Up/Down ----------------------------- Range changes continuously

．７５

．２５

ＨＵ

．７５

．２５

ＨＵ

Range rings ON Range rings OFF

RANGE UP &RANGE DOWN ------------ Range changes in step

(4) To cancel the vari-range function, press a key except "RANGE UP" and "RANGE DOWN" key.

When use the function, follow from (1) again.

5.5.1.11 Output the position data of Cursor ( TARGET )

Place the cross cursor to the position that is to output position data with up-down and left-right key.

Use the up-down cursor keys to select TARGET from among the pull-down display items, and press

the "ENT" key. The L/L data of the position will be output to NMEA port with TLL format.

Up/Down −＞ＥＮＴ･･･････････････････････ output the L/L position of the cursor

(Select TARGET)

Note: When activate this function, nothing happened on the screen.

5.5.1.12 Follow the Distance and Bearing marker on the cursor (+MK LINE)

(1) Use the up-down cursor keys to select +MK LINE from among the pulled down and displayed items,

and press the "ENT" key.

(2) When ON is selected with the up-down cursor key from the ON/OFF display beside the +MK LINE

item, and the "ENT" key is pressed, the +MK LINE function becomes valid, and distance/bearing

marker will be displayed at the cross cursor.

Setting procedure

Up/Down −＞ ENT −＞ Up/Down (Select ON) −＞ ENT +MK LINE function is turned ON

(Select +MK LINE) └＞ Up/Down (Select OFF) −＞ ENT +MK LINE function is turned OFF

(3) The distance/bearing marker follows to the cross cursor until +MK LINE function is turned OFF.

．７

５

．２５

ＨＵ

．７

５

．２５

ＨＵ

+MK POS

230.0°

0.47

+MK POS

230.0°

0.47

+MK LINE ＯＦＦ +MK LINE ＯＮ

The distance/bearing marker follows to cross

cursor. EBLs and VRMs can be used separately.

5.5.2 Nav (Navigation) Menu

xxx = keys to press

Radar functions for navigation aid are in this menu.

Common operations for the NAV menu

(Up to the point when "NAV" menu is selected from the main menu)

Press the "MENU" key and select "NAV" from the displayed 4 main menus using the left-right cursor.

(The contents of the selected MENU will appear on a pull-down display in accordance with the

movement of the left-right cursor.)

MENU →Left/Right

(Select NAV)

Further explanation about the NAV menu will be conducted on the assumption that this "common

operation for the NAV menu" has already been completed.

5.5.2.1 Changing display mode (MODE)

(1) Select MODE from the pull-down display items using the up-down cursor key, and press either

the "ENT" key.

(2) When the MODE sign is displayed beside the MODE item, select a mode with the up-down

cursor keys and press the "ENT" key.

(3) The display mode indicates upper-left on the screen.

UP/DOWN --> ＥＮＴ --> UP/DOWN

（Select MODE）|--> (Select HU）--> ＥＮＴ･･･････････ＨＵ（Head up）

|--> (Select HS）--> ＥＮＴ･･･････････ＨＳ（Head set）

|--> (Select NU）--> ＥＮＴ･･･････････ＮＵ（North up）

|--> (Select CU）--> ＥＮＴ･･･････････ＣＵ（Course up）

--> (Select TM）--> ＥＮＴ･･･････････ＴＭ(True motion)

Note1: Navigation equipment (gyrocompass, magnet compass, or GPS) must be connected to your

radar in NU, CU and TM modes.

Note2: In TM modes it is necessary to set as follow (1) or (2).

(1) Input of speed information from NMEA. (2) Set your ship’s speed manually.

Note3: TM works only on PPI screen, NU is used automatically for the other screens.

MARK

MODE >

GZ >

OFF-C >

SLEEP >

.75

.25

HU LNAV ECHO SETUP

NAVIGATION

>>>

0.23 NM

5.5.2.2 Guard Zone (GZ)

A function that sets a guard zone of any distance and any angle range, creating alarm tone when

either echoes above a certain level exist (IN MODE) or no echoes exist(OUT MODE).

Setting guard zone

(1) Select GZ from the pull-down display items using the up-down cursor keys, and press the “ENT”

key. ON/OFF sign is displayed beside the GZ item.

Up/Down → ENT -----------------------------------------------------------------------ON/OFF sign is displayed.

(2) Select “ON” by “common operation for the GZ menu”,

and press the “ENT” key.

(3) The present mode setting will be displayed on the left

side of the screen as GZ IN. A small cross cursor for

setting the guard zone will be displayed at the screen

center while "SET CENTER POINT" is displayed at

the bottom, activating a guard zone setting state.

(4) Use the up-down and left-right cursor keys to move the cross cursor to the center of the

warning zone to be set, and press the "ENT" key.

(5) From the cross cursor position set in (4) above as the center, expand the guard zone as

follows.

(6) After the setting the guard zone, finish by pressing the "ENT" key.

To cancel the guard zone function, select “OFF” by

“common operation for the GZ menu”, and press the

“ENT” key.

ENT → Up/Down &Left/Right →ENT → Up/Down &Left/Right → ENT ---------------------------------------------Setting completed

(Setting the center of GZ) (Setting the scope of GZ)

GZ IN

SET CENTER POINT

The central position of the guard zone.

With this point as the center, the zone

can be expanded in the directions of the

distance and the angle with the upper

and right cursor keys respectively.

Expand with the right cursor key in the

direction of the angle. Use the left

cursor key to make the zone smaller.

Expand with the up cursor key in the direction

of the distance. Use the down cursor key to

make the zone smaller.

The mode (IN or OUT) is displayed when the state is ON.

Nothing is displayed when it is OFF.

GZ IN

Stop the alarm tone

When the alarm sounds, press any key to stop. But the guard zone function is still working, the

alarm may sounds again. To "OFF" the guard zone function, select "OFF" from GZ menu.

Note1: To switch the IN or OUT mode, refer to “Guard Zone Mode” in section 5.5.4.5.3 “Changing the

content of settings 2 (PRESET2)”

Note2: To set the guard zone level, refer to “Guard Zone LeveL” in section 5.5.4.5.3 “Changing the

content of settings 2 (PRESET2)”

5.5.2.3 Shifting display in specific direction (OFF-C)

Displaying the location specified by the cross cursor as the vessel's location.

(1) Select OFF-C from the pull-down display items using up-down cursor key, and press the

"ENT" key.

(2) When the ON/OFF sign is displayed beside the OFF-C item, select ON with the up-down

cursor keys and press the "ENT" key.

(3)

OFF-C

is displayed at the upper right and "SET OFF CENTER POINT" at the bottom of the

screen, and setting is ready to be entered. Move the cross cursor with the cursor keys to

move the ship’s to the intended location, and press the "ENT" key. The ship’s location will be

displayed at the cursor's location. The display at the upper right will be normalized from the

reverse state, which indicates that the "OFF-C" state is entered.

(4) To cancel “OFF-C” function, either select OFF in (2)

Up/Down → ENT → Up/Down

(Select OFF-C) → (Select ON) ENT →Left/Right &Up/Down →ENT ----Set OFF-C

→ (Select OFF) ENT ----------------------------------------- Cancel OFF-C

Note: VRM2 and EBL2 do not follow the OFF-C function while floating.

The function operates only on PPI screen.

5.5.2.4 Setting of the SLEEP function(SLEEP)

This function sends a 30-second-transmissions during pre-fixed hours. After a transmission, a

power-saving mode is entered with the screen in ST'BY state (the scanner-OFF state) and the LCD

backlight turned off. This action is repeatedly executed.

Usage example, set a guard zone and have the warning signal automatically confirmed every

prefixed period.

.75

.25

.75

.25

SET OFF-C POINT

OFF-C

Move the cross cursor indicates "OFF-C" state is entered

(1) Use the up-down cursor keys to select SLEEP from among the pull-down display items, and

press the "ENT" key.

(2) When the OFF/5min/10min/15min display has appeared beside the SLEEP item, select a time to

be set with the up-down cursor keys.

(3) Press the "ENT" key and the setting is completed. When the SLEEP function is to be canceled,

select OFF in (2).

When a transmission is conducted after setting a SLEEP mode, a ST'BY state is entered and the

backlight turns off after a 30-second-transmission. (Power-saving mode). Two minutes before the

fixed time the backlight turns on and the 2-minute timer starts. Then, at the fixed time another

30-second-transmission begins. This series of actions are repeated. If any one key is pressed

during the course of this action, the SLEEP function will be canceled.

(a) Setting procedure

Up/Down → ENT → Up/Down → (Select OFF) → ENT ----------------------------- SLEEP function is turned OFF

(Select SLEEP) → (Select 5min.) → ENT → POWER --------30-second-transmission every 5 min.

→ (Select 10min.) → ENT → POWER ------30-second-transmission every 10 min.

→ (Select 15min.) → ENT → POWER ----- 30-second-transmission every 15 min.

Transmission

Setting completed

(b) Action after setting

SLEEP setting（5min.）（Operation）

⇓

⇑(Under Tx） ⇑(Under power-saving mode）⇑（2min. timer in use）⇑ (Under Tx）⇑ (Under power-saving mode）

0 sec. 30 sec. 3 min. 5min. 5and a half min. （Time used）

TX Start TX OFF Backlight ON Tx Start TxOFF （Action）

Countdown start

-- What happens if a key is pressed after a SLEEP mode setting?

If a transmission is conducted and a key is pressed after setting a SLEEP mode, power-saving

mode is entered 30 seconds after key is pressed.

-- What happens if a key is pressed during the SLEEP mode?

a) If a key is pressed during the power-saving mode, the SLEEP function is canceled and the 2-

minute timer starts.

b) If a key is pressed while the 2-minute timer is in use, or during transmission , the SLEEP function

is canceled.

5.5.3 Echo Menu

××× ＝ keys to press

Adjustment options to be conducted on the echoes displayed on the screen

・

Common operations for the ECHO menu

(Up to the point when "ECHO" menu is selected

from the main menu)

Press the "MENU" key and select "ECHO" from the displayed 4 main menus using the left-right

cursor. (The contents of the selected MENU will appear on a pull-down display in accordance with

the movement of the left-right cursor.)

MENU ――＞ Left/Right

(Select ECHO)

When the above-mentioned operations have been conducted, the items of the ECHO menu are

vertically displayed.

Further explanation about the ECHO menu will be conducted on the assumption that this

"common operation for the ECHO menu" has already been completed.

5.5.3.1 Sensibility adjustment (GAIN)

(1) Use the up-down cursor keys to select GAIN from among the pull-down display items, and

press either the "ENT" key or the right cursor key.

(2) Select MANU from the MANU/AUTO display beside the GAIN item using the up-down cursor

keys, and press the "ENT" key.

(3) The present state of GAIN is displayed in reverse on the

screen left as

G 35

and an adjustable state is entered.

When the control knob are operated in this state, the figure

alternates within a range of 0 and 99 and the GAIN can thus

be adjusted.

(4) The adjustment is completed by pressing the "ENT" key

after adjustment.

When AUTO action is to be entered, select AUTO in (2)

and press the "ENT" key to complete the setting.

Ｇ５

６

The setting value is displayed during

MANUAL operation.

AT is displayed during AUTO operation.

(The same applies to STC, FTC and TUNE.)

ＭＡＲＫ

．７５

．２５

ＨＵ LＮＡＶＥＣＨＯＳＥＴＵＰ

ＥＣＨＯ

▼

０．２３

ＧＡＩＮ

ＳＴＣ

ＦＴＣ

ＴＵＮＥ

ＳＴ

▼

▼▼▼▼

ＭＡＮ

ＡＵＴ

Up/Down −＞ ENT −＞ Up/Down

(Select GAIN) └＞(Select MANU) −＞ Control knob −＞ ENT --- Set to MANU mode

｜(GAIN adjustment)

└＞(Select AUTO) −＞ ENT ---------------------Set to AUTO mode

5.5.3.2 Removing sea clutter (STC)

Refer to the section, “Sensibility adjustment (GAIN)”.

Up/Down −＞ ENT −＞ Up/Down

(Select STC) └＞(Select MANU) −＞ ENT −＞ Control knob −＞ ENT Set to MANU mode

｜(STC adjustment)

└＞(Select AUTO) −＞ ENT ----------------------------Set to AUTO mode

└＞(Select HARBOR)−＞ ENT --------------------------------------------

Set to HARBOR mode

Note: When you select MANU mode, GAIN and FTC will be switched to MANU mode, too.

Note: When you select HARBOR mode, FTC will be switched to MANU mode.

5.5.3.3 Removing rain and snow clutter (FTC)

Refer to the section, “Sensibility adjustment (GAIN)”.

Up/Down −＞ ENT −＞ Up/Down

(Select FTC) └＞(Select MANU) −＞ ENT −＞ Control knob −＞ ENT Set to MANU mode

｜(FTC adjustment)

└＞(Select AUTO) −＞ ENT ----------------------------Set to AUTO mode

5.5.3.4 Adjusting receiver tuning (TUNE)

Refer to the section, “Sensibility adjustment (GAIN)”.

Up/Down −＞ ENT −＞ Up/Down

(Select TUNE) └＞(Select MANU) −＞ ENT −＞ Control knob −＞ ENT Set to MANU mode

｜(TUNE adjustment)

└＞(Select AUTO) −＞ ENT ----------------------------Set to AUTO mode

Indicated setting value on manual mode,

AT on auto mode

5.5.3.5 Echo expansion (ST)

Expanding the echo to the direction of the distance.

Two types of echo expansion exist, select ST1 or ST2 from the menu.

(1) Use the up-down cursor keys to select ST from among the pull-down display items, and press

the "ENT" key.

(2) Select ST1 or ST2 from the display beside the ST item using the up-down cursor keys, and

press the "ENT" key.

Up/Down −＞ＥＮＴ −＞ Up/Down −＞（select ST1）････････････････････ −＞ＥＮＴ

set ST1

└＞（select ST2）･････････････････････−＞ＥＮＴ

set ST2

└＞（select OFF）･････････････････････−＞ＥＮＴ

ST OFF

( expansion rate ST1<ST2 )

5.5.3.6 Displaying locus of target (TRACK)

(1) Use the up-down cursor keys to select TRACK from among the pull-down display items, and

press the "ENT" key.

(2) Select 15SEC, 30SEC, 1MIN, 3MIN, 6MIN, or CONT from the display beside the TRACK item

using the up-down cursor keys, and press the "ENT" key.

"TRK 15S" is displayed on the left side of the screen and track mode is entered. 15S indicates

the length of the track, and displays a maximum of 15-second-long sailing track.

Note: When PPI+PPI or ALL PPI+PPI screen mode is used, TRACK function can be used only on CONT mode.

．７５

．２５

ＨＵ

ＳＴ１

．７５

．２５

ＨＵ

The picture to display echoes

expanded in the direction of

the distance

ST1, or ST2 display,

no display on OFF state

ST function is OFF

disappear after selecting time

real echo

locus of target

moving direction

the length of the track

．７５

．２５

ＨＵ

TK 15SEC

up/down −＞ＥＮＴ −＞ up/down −＞（select OFF）･････････････ −＞ＥＮＴ

TRACK OFF

└＞（select 15SEC）･･････････････････････････････････−＞ＥＮＴ

set 15sec. track

└＞（select 30SEC）･･････････････････････････････････−＞ＥＮＴ

set 30sec. track

└＞（select 1MIN）−＞ＥＮＴ････････････････････ set 1 min. track

└＞（select 3MIN）−＞ＥＮＴ････････････････････ set 3 min. track

└＞（select 6MIN）−＞ＥＮＴ････････････････････ set 6 min. track

└＞（select CONT）･･･････････････････････････････････−＞ＥＮＴ

set continue track

5.5.3.7 Enlarging selected areas (ZOOM)

The video image centering around the cross cursor is doubled as it is displayed on the screen.

(1) Use the up-down cursor keys to select ZOOM from among the pull-down display items, and press

the "ENT" key.

(2) Select ON the using up-down cursor keys from the ON/OFF display beside the ZOOM item, and

press the "ENT" key.

(3) A small cross cursor for setting and "SET ZOOM POINT" are displayed at the screen center and

at the bottom respectively, and the magnification point is to be set. Use cursor keys to move the

cross cursor to the point to be magnified, press the "ENT" key and the setting is completed. The

area around the cross cursor is displayed in 2x magnification, with blinking "ZOOM" displayed at

the screen upper right, indicating that a ZOOM display is being conducted.

To cancel the ZOOM function, either select OFF in (1) or begin operation of range.

Up/Down −＞ ENT −＞ Up/Down (Select ON) −＞ ENT −＞ Up/Down &Left/Right −＞ ENT ZOOM Setting

(Select ZOOM) ｜(Move cross cursor)

└＞ (Select OFF) −＞ ENT ----------------------------- ZOOM canceled

Note 1) VRM2 and EBL2 do not follow the ZOOM function during a floating state.

Note 2) Normal screen returns when you change the range scale.

Note 3) ZOOM function is usable only in PPI screen.

Note 4) ZOOM function is unusable in OFF-C.

Note 5) Center of ZOOM can be set any desired position within the set range.

blinking "ZOOM"

5.5.3.8 Increasing sensitivity (S/L)

The pulse width is automatically changed as you change the range. However, if you want to

increase sensitivity, you can choose sensitivity from two pulse widths. The short pulse (SHORT) gives

you sharp images with high distance resolution. The long pulse (LONG) provides high sensitivity and

shows targets in large size for easy identification although distance resolution is reduced.

(1) Use the up-down cursor keys to select S/L from among the pull-down display items, and press

the "ENT" key.

(2) Select Pulse length(SHORT or LONG) using the up-

down cursor keys from the SHORT/LONG display beside

the S/L item

(3) The setting will be completed when the “ENT” key is

pressed after the selection.

Up/Down −＞ ENT −＞(Select SHORT) −＞ ENT ----------------------Set to short pulse

└＞(Select LONG) −＞ ENT ------------------------Set to long pulse

SET ZOOM POINT

．７５

．２５

ＨＵ

Ｓ

indicated S or L

5.5.4 SETUP Menu

To be used for various settings and switching of the screen

・

Common operations for the SETUP menu

(Up to the point when "SETUP" menu is selected

from the main menu)

Press the "MENU" key and select "SETUP" from the displayed 4 main menus using the left-

right cursor. (The contents of the selected MENU will appear on a pull-down display in accordance

with the movement of the left-right cursor.)

MENU ――＞ Left/Right

(Select SETUP)

When the above-mentioned operations have been conducted, the items of the SETUP menu are

vertically displayed. Further explanation about the SETUP menu will be conducted on the

assumption that this "common operation for the SETUP menu" has already been completed.

5.5.4.1 Initiating the screen display (WINDOW)

A function to switch the display method of the screen. A selection can be made from among

the 7 patterns of screen arrangements, from the ordinary PPI display to the 2-screen PPI display,

etc.

a) PPI screen

b) PPI screen & SEMI3D screen

c) PPI screen & PPI screen (Range can be operate in each screen.)

d) PPI screen & Navigation screen

e) All PPI screen (PPI, all the screen display.)

f) All PPI screen & All PPI screen(PPI & PPI, all the screen display.)

g) MOB screen

(1) Use the up-down cursor keys to select WINDOW from among the pull-down display items, and

press the "ENT" key.

(2) Select a screen to be displayed with the up-down cursor keys from among the above 7 items

that are displayed beside the WINDOW item.

(3) The setting will be completed when the "ENT" key is pressed after the selection.

ＭＡＲＫ

ＷＩＮＤＯＷ

ＳＥＬＷＩＮ

ＰＩＣＴＵＲＥ

SYSTEM CHECK

ＣＵＳＴＯＭ

．７５

．２５

ＨＵＮＡＶＥＣＨＯＳＥＴＵＰ

SEMI3D/PPI

ＰＰＩ／ＰＰＩ

ＰＰＩ／ＮＡＶ

ＡＬＬＰＰＩ

ＡＬＬＰＰＩ／Ｐ

ＰＩ

ＰＰＩ

ＳＥＴＵＰ

▼▼▼

▼

０．２３

Ａ

▼

Up/Down ―＞ ENT ―＞ Up/Down ――＞ (Select PPI） −＞ ENT （a）

（select WINDOW） └−＞ (Select PPI+SEMI3D）

−＞ ENT （b）

└−＞ (Select PPI+PPI） −＞ ENT （c）

└−＞ (Select PPI+NAV） −＞ ENT （d）

└−＞ (Select ALL PPI） −＞ ENT （e）

└−＞ (Select ALL PPI+PPI） −＞ ENT （f）

└−＞ (Select MOB） −＞ ENT （g）

-The limitation of the operation when it was set on each screen.

CREEN

ITEM

ＰＰＩ PPI/SEMI3D

PPI/NAV PPI＋PPI ALL PPI ALL PPI PPI MOB

RANGE 〇○◎○◎×

VRM1、EBL1 ○○△×××

VRM2、EBL2 〇○△×××

FL VRM2･EBL2 〇×××××

RINGS ON/OFF 〇○○○○×

ZOOM、OFF CENT 〇×××××

///CSR 〇○△○○×

HDG OFF 〇○○×○×

STERN M ○○○○○×

NORTH M 〇○○○○×

GAIN、STC、FTC 〇○◎×××

TUNE ○○○×××

ST 〇○○×××

GZ ○○◎×××

SEL WIN ××○×○×

CONTRAST ○ ○ ○ ○ ○ ×

TXON/OFF ○○○○○×

◎ ： Independent control at time as two screen.（Switching the screen is necessary (SEL WIN)）

○ ： It becomes simultaneous control at the time as two screen.

△ ： It can be used only at the time of PPI screen.

× ： It can’t be used.

- Screen modes and Operations

(a) PPI Screen

All functions can be used on this screen.

．７５

．２５

ＨＵ

＋

PPI Screen

(b) PPI/SEMI3D Screen

It becomes simultaneous control at the time as

two screen.

Note1: All controls, such as EBLs, VRMs effects both

screen.

The ZOOM, OFF-C, FL EBL2, and FL VRM2 could

not be used on this mode. The "SEMI3D" screen

displays the center as ship's heading always.

The radar picture is refreshed two antenna

scanning for each PPI screen. Un-refreshed screen picture is holded during the time.

Note: The radar picture is refreshed with two scanning interval for each screen. Right

screen picture is holded during refreshing left screen, left screen holded during

refreshing right screen. When your ship navigates in high speed, use PPI screen to get

fast refreshing picture.

Note: Functions ZOOM, OFF-C, FL-EBL2, and FL-VRM2 can not be used on this screen.

Note: The function RANGE, GAIN, STC, FTC, and GZ can be used for each screen

independantly. The screen selected in "

SEL WIN

" that the range indicator displayed in

reverse can be controlled.

Note: The cross cursor displayed only on selected screen.

-Operation

a) Changing RANGE of LEFT screen

１） When the RIGHT range indicator displayed in reverse, change to LEFT screen with

"SEL WIN" function.

２） Press ”RANGE UP” or ”RANGE DOWN” key to change the LEFT screen RANGE.

b) Adjusting GAIN of LEFT screen.

１） When the RIGHT range indicator displayed in reverse, change to LEFT screen with

"SEL WIN" function.

２） Press the "GAIN" key, "

G50

" will displayed in reverse and ready for adjusting GAIN.

３） Adjust GAIN with the control knob.

Adjust STC and FTC in a same manner as GAIN.

．７５．２５ＨＵＳ

＋

280 320 000 040 080

PPI/SEMI3D Screen

LEFT screen /―――/・・・・・・/―――/・・・・・・/―――/・・・・・・ｔ→

RIGHT screen ・・・・・・ /―――/・・・・・・/―――/・・・・・・/―――/

picture drawing(refreshed)

displayed previous picture ( hold)

．７５

．２５

ＨＵＳ

２４

６

＋

Ｇ 55/35

Ｓ 35/AT

Ｆ 35/AT

LEFT screen selected

．７５

．２５

ＨＵＳ

２４

６

＋

Ｇ 55/35

Ｓ 35/AT

Ｆ 35/AT

GAIN adjustment for LEFT screen

Left GAIN indicates in reverse

Note: During adjustment of GAIN, STC, or FTC, radar picture refreshing is fixed to the

adjusting screen. Approximately 5 seconds errapsed after adjustment, radar picture

refreshing is return to normal.

c) Determining the distance with VRM1 on LEFT screen.

１) When the RIGHT range indicator displayed in

reverse, change to LEFT screen with "SEL WIN"

function.

２） Press the "VRM1" key, " " will displayed

in reverse and ready for adjusting VRM1.

３） Determining the distance with the control knob.

Note: If operate the VRM1 on the RIGHT screen, VRM1

will move to the RIGHT screen.

Operate VRM2, EBL1, or EBL2 in a same manner as VRM1.

(d) PPI/NAV Screen

Note: The ZOOM, OFF-C, FL EBL2, and FL

VRM2 can not be used on this screen.

(e) ALL PPI Screen

Note1: The RANGE, RINGS interval, and Display mode

are displayed on the upper-left of the screen.

Note2: When press the key except "MENU", "RANGE

UP/DOWN", "BRILL", and "POWER", return to

PPI screen.

(f) ALL PPI/PPI Screen

Note1: The RANGE, RINGS interval, and Display mode

are displayed on the top of the screen.

Note2: When press the key except "MENU", "RANGE

UP/DOWN", "BRILL", and "POWER", return to

PPI/PPI screen.

Note3: The radar picture is refreshed with two

scanning interval for each screen. Right screen picture

is holded during refreshing left screen, left screen

holded during refreshing right screen. When your ship

navigates in high speed, use PPI screen to get fast

refreshing picture.

Ｇ 55/35

Ｓ 35/AT

Ｆ 35/AT

1 0.00NM

Determining the distance with VRM1

on LEFT screen

．７５

．２５

ＨＵＳ

２４

６

＋

．７５．２５ＨＵＳ

＋

NAV ＤＩＳＰＬＡＹ

WAY P １２３．４°

６．８ＮＭ

COURSE ２．３８ＮＭ

XTE ＜＜＜

HDG ２６７．３°Ｔ

SPD １２．８ＫＴ

TEMP ２０．８° Ｃ

DEPTH ５８．３ M

LAT/LON

３４°０８．２２Ｎ

１３８°０２．５３Ｅ

PPI/NAV screen

＋

．７５

．２５

ＨＵ S

ALL PPI screen

．７５

．２５

ＨＵＳ

．２５

．１２５

＋

ALL PPI PPI screen

1 0.00NM

(g) MOB Screen

The MOB key has been pressed, the MOB position and

ship's position are displayed. If not, MOB position will be

displayed with bars( --.- )

Press MOB key to clear the MOB position and return

to previous screen. Press ENT key to return previous

screen with keeping the MOB position data.

5.5.4.2 Switching screens on PPI/PPI screen ( SEL WIN )

Switching to the desired screen for activation on a PPI/PPI screen display.

The "SEL WIN" function is switches the activated screen to effect the operation such as,

RANGE, GAIN, STC, FTC, VRM1/2, EBL1/2, and guard zone. The range indicator of activated

screen is displayed in reverse.

When "SEL WIN" is selected with the up-down cursor keys from among the pull- down display

items and the "ENT" key is pressed, activated screen will be changed to the opposite screen.

Up/Down ―＞ＥＮＴ･･････････････････････････････the opposite screen activated

（select SEL WIN）

5.5.4.3 Reversing the screen (PICTURE)

Reversing to the screen for easy viewing on weather, temperature, and day / night

environment conditions.

When "PICTURE" is selected with the up-down cursor keys from among the pull- down display

items, select "DAY" and the "ENT" key is pressed, a normal display will appear. A reverse display

will appear if "NIGHT" selected

Up/Down ―＞ＥＮＴ ―＞ Up/Down ――＞ (select DAY） −＞ＥＮＴ −＞ normal display

（select PICTURE） └−＞ (select NIGHT） ---------------−＞ＥＮＴ

−＞ reverse display

MAN OVERBOARD

MOB POS 35°08．42N

139°03．33E

SHIP

’

S POS

37°12．42N

142°04．33E

PRESS MOB KEY TO DATA CLEAR

PRESS ENTER KEY TO RETURN

Range display on the active screen become a reverse

.75

.25 S．５．２５ .75 .25 HU S

．５

．２５

5.5.4.4 Fault Diagnosis by Self Check

（

SYSTEM CHECK)

Verifying the problem point by SYSTEM CHECK when, for example, some abnormality has

occurred.

(1) Select SYSTEM CHECK from the pull-down display items using up-down cursor key, and

press the “ENT” key.

(2) The system check screen will appear.

While watching the screen , check the following:

i) Whether all items are marked “OK”. (If any item is marked “NG”, the indicated location

may be faulty.)

ii) Press a front-panel key and see if the corresponding display on the screen is highlighted.

iii) Turn the control knob and see if the lower-right indicator move to right or left.

(3) Press the POWER key to return to the previous screen

ａ）ＲＯＭ

------------------------- Indicates the ROM status.

ＲＮＧＵ

ＲＮＧＤ

ＢＲＩＬＬ

ＡＵＴＯ

ＧＡＩＮ

ＳＴＣ

ＦＴＣ

１

２

３

４

５

６

７

ＭＯＢPOWER

n) Indicates the operation

status of front-panel keys.

SYSTEM CHECK screen

ＥＮＴ

ＭＥＮＵ

Indicates the control knob status.

Indicates the cursor status.

ＣＯＮＴＲＯＬＫＮＯＢ

SYSTEM CHECK

MEMORY CHECK

a) ROM-------------------------- ＞ ROM OK

b) RAM-------------------------- ＞ RAM OK

c) Backup memory --------------- ＞ BACKUP OK

SIGNAL CHECK

d) Transmit trigger --------------- ＞ (1) TRIGGER OK

e) Bearing pulse------------------ ＞ (2) AZIMUTH OK

f) Heading pulse------------------ ＞ (3) HM OK

g) +5Vvoltage（at video circuit）--- ＞ (4) +5V OK 5.2V

h) High voltage（at scanner）------ ＞ (5) H.T. AT SU OK 253.2V

i) High voltage（at display）-------- ＞ (6) H.T. AT DU OK 253.2V

j) Magnetron current ------------- ＞ (7) MAG. CUR. OK 2.1

k) Tuning voltage----------------- ＞ (8) TUNE OK

l) Cumulative usage time ------- ＞ HOURMETER

Operation time ------------- ＞ OPERATE 12.0H

Transmit time --------------- ＞ TRANSMIT 10.3H

m) ROM version--------------- ＞ ROM VERSION V1.00

PRESS POWER KEY TO RETURN

ＤＡＹ display ＮＩＧＨＴ display

．７５

．２５

ＨＵ

．７５

．２５

ＨＵ

ｂ）ＲＡＭ

----------------------

Indicates the RAM status.

ｃ）

Backup memory---------

Indicates the backup memory status.

ｄ）

Transmit trigger--------

Indicates the signal line status for the trigger signal sent from the scanner unit.

）

Bearing pulse-------------

Indicates the signal line status for the bearing signal sent fron the scanner unit.

）

Heading pulse ------------

Indicates the signal line status for the bow signal sent from the scanner unit.

）

+5V voltage ---------------

Indicates the reference voltage status of the video circuit and its voltage value.

(at video circuit)

(normally about 5 V)

）

High voltage(at SU) ----

Indicates the status of th high voltage supplied from the display unit to the

scanner unit and its voltag value (normally about 250 V) at scanner unit.

）

High voltage(at DU)-----

Indicates the status of th high voltage supplied from the display unit to the

scanner unit and its voltag value (normally about 250 V) at display unit.

）

Magnetron current

------- Indicates the status of the anode current flowing in the magnetron and its

current value.

）

Tuning voltage

------------ Indicates the status of the voltage used for tunning and its voltage value.

）

Cumulative usage time

-Indicates the cumulative time your radar is used.

OPERATE

: Duration of time during which the power supply is turned on.

TRANSMIT

: Duration of time transmitting.

）

ROM version

-------------- Indicates the ROM software version.

）

Front-panel keys

--------- As you press any front-panel key when the SYSTEM CHECK screen is on, the

corresponding key is highlighted on the screen by displaying it in reverse video.

5.5.4.5 Changing the content of the setting (CUSTOM)

Note) Items in CUSTOM are for conducting settings and adjustments at the time of installation, which

need not be conducted normally.

-Common operations for CUSTOM

Use the up-down cursor keys to select CUSTOM after ”the common operations for the SETUP” menu,

and press either the "ENT" key.

MENU −＞ Left/Right −＞ Up/Down −＞ ENT

(Select SETUP) (Select CUSTOM)

Common operation for SETUP

When the above operations have been conducted, 4 items, namely "KEY ASSIGN", "PRESET1",

"PRESET2" and "ADJUST", are displayed beside the CUSTOM item.

Further explanation concerning the CUSTOM menu items will be done on the assumption that the

above "common operations for CUSTOM" have already been conducted.

ＣＵＳＴＯＭ

ＭＡＲＫＷＩＮＤＯＷ

ＳＥＬＷＩＮ

ＰＩＣＴＵＲＥ

ＳＹＳＴＥＭＣＨＥＣ

Ｋ

．７５

．２５

ＨＵＳ

Ｌ

ＮＡＶＥＣＨＯＳＥＴＵＰ

ＳＥＴＵＰ

▼▼

▼

０．２３

▼

Ａ

ＫＥＹＡＳＳＩＧＮ

ＰＲＥＳＥＴ１

ＰＲＥＳＥＴ２

ＡＤＪＵＳＴ

▼

5.5.4.5.1 Changing the settings of soft keys (KEY ASSIGN)

Conducting alterations and new settings for the functions of keys with number displays of 1-7.

(1) Screen display for the setting

When KEY ASSIGN has been selected with the up-down cursor keys from among the CUSTOM items

and the "ENT" key is pressed, the setting screen is displayed. (See chart below)

(2) Selecting functions

Reverse the items to be set using the up-down cursor keys. (The items become reverse in accordance

with the moving cursor.)

(3) Key settings

(3)-1 Making new settings (Example 1)

For allocating the selected item to a soft key, press the key to be allocated. The selected item

will be displayed beside the key, which indicates that the setting has been conducted.

(3)-2 Changing the function of a key with an preset function (Example 2)

When the allocated key is pressed, its function will be altered to the one selected in (1) above and

the previous function will be canceled.

The current settings for SET1-4 will be displayed below NEXT. In order to switch the settings

SET1-4, use the right-left cursor keys. (Double settings (setting 1 item for more than 1 key) are

possible.)

ＫＥＹＡＳＳＩＧＮＭＥＮＴ

EBL1 EBL2 RINGS PPI

VRM1 VRM2 TUNE PPI/3D

VAR RNG FL EBL2 ST PPI/PPI

TRACK FL VRM2 ZOOM PPI/NAV

TARGET GZ SLEEP ALL PPI

SEL WIN OFF-C PICTURE ALL PPI2

NEXT NEXTNEXT NEXT

SET1 SET2 SET3 SET4

ＭＡＲＫ □ EBL1

□ VRM1

□ EBL2

□ VRM2

□ FL EBL2

□ FL VRM2

□ HDG OFF

□ ///CSR

□ RINGS

□ VAR RNG

□ TARGET

□ +MK LINE

ＮＡＶ □ MODE

□ GZ

□ OFF-C

□ SLEEP

ＥＣＨＯ □ TUNE

□ ST

□ TRACK

□ ZOOM

□ S／L

ＳＥＴＵＰ □ SEL WIN

□ PICTURE

□ PPI

□ PPI/3D

□ PPI/PPI

□ PPI/NAV

□ ALL PPI

□ ALL PPI2

□ NEXT

Key Groups

Move with up-down cursor Move with right-left cursor

Mark is displayed if the function set to some key. Operation panel Keys 1 - 7

Soft Key Setting Screen

When settings are to be conducted for more than 1 key, repeat the operations (3)-1 to (3)-2. (Example 3)

(4) Completing the setting

After the setting has been finished, press the ENT key to exit from KEY ASSIGNMENT.

Example of an operation

(The process up to the selection of KEY ASSIGNMENT from the SETUP menu is omitted. Only the

process after the above chart will be described.)

Example 1) Altering OFF-C allocated to key 6 in setting 2 to HDG OFF.

Up/Down → ６ →ENT -------------------Key 6 altered from

Select HDG OFF The display beside key 6 Exit from OFF-C to HDG OFF

changes to HDG OFF KEY ASSIGNMENT

Example 2) Re-allocate SEL WIN to key 1 in setting 2.

Left/Right → Up/Down → １ →---------------- ENT Key 1 in

setting 2

select SEL WIN SEL WIN is displayed Exit from is altered to SEL WIN

From SET1 beside key 1. KEY ASSIGNMENT

to SET2

Example 3) Alter key 1 in setting 1 from ST to HDG OFF and then reset key 1 in setting 2 as SEL WIN.

Up/Down → ６ --------- Key 6 altered from

Select HDG OFF The display beside key 6 ST to HDG OFF

changes to HDG OFF

Left/Right →Up/Down → １ →ENT -------------Key

Select SEL WIN SEL WIN is displayed Exit from is altered to SEL WIN

From SET1 beside key 1. KEY ASSIGNMENT

to SET2

5.5.4.5.2 Changing the content of settings 1(PRESET1)

(1) When PRESET1 is selected from CUSTOM items and the "ENT" key is pressed, the

PRESET1 screen (See chart below) appears.

(2) Select items with up-down keys and contents with left-right keys.

The selected items will be enclosed by square frames and the contents will appear in reversed

display. (a)

Repeat this operation when multiple settings are to be made.

(3) After the setting is completed, exit from the PRESET1 screen with the "ENT" key.

Note) The contents will be displayed in (b) together with the numbers selected in P TABLE.

ａ） Heading Flash Each revolution of the antenna turns the heading marker on

and off.

b) Stern Mark Display/non-display of the stern line

c) North Mark Display/non-display of the north mark

ｄ） ST'BY screen Setting the screen display in stand-by

NAVI: Navigation Data screen

NOR: Normal screen

e) Buzzer Volume Setting the volume of the buzzer

ｆ） VRM Unit Setting VRM unit

NM: Nautical mile

KM: Kilometer

SM: Statute mile

g) Water temperature Setting water temperature

unit

°C: Celsius

F: Fahrenheit

h) Depth Unit Setting Depth unit

M: Meter

a) Heading Flash

b) Stern Mark

c) North Mark

d) ST'BY screen

e) Buzzer Volume

f) VRM Unit

g) Water temperature

h) Depth Unit

i) EBL Mode

j) WayPoint Mode

k) Heading Input

l) Heading Type

m) Cursor position

n) TX Pulse

ＰＲＥＳＥＴ１

ＨＭＦＬＳＨＯＮＯＦＦ

ＳＴＥＲＮＭＯＮＯＦＦ

ＮＯＲＴＨＭＯＮＯＦＦ

ＳＴ‘ＢＹＮＡＶＩＮＯＲ

ＢＵＺＶＯＬＯＦＦＬＯＷＨＩＧＨ

ＲＭＵＮＩＴＮＭＫＭＳＭ

TEMP °ＣＦ

ＤＥＰＴＨＭＦＴＦＭ

ＥＢＬＢＲＧＲＥＬＴＲＵＥＭＡＧ

ＷＰＢＲＧＴＲＵＥＭＡＧ

ＨＥＡＤＩＮＰＵＴＮＭＥＡＳＩＮ／ＣＯＳ１2ＢＩＴ１０ＢＩＴ

ＨＥＡＤＴＲＵＥ MAG

＋ＭＫＭＯＤＥＤＩＳＴ／ＢＲＧＬＡＴ／ＬＯＮ

ＰＴＡＢＬＥ 0 1 ２

．５．７５１．５３６

ＰＴＡＢＬＥ１ＳＨＯＲＴ 000１１

ＬＯＮＧ 0１１２２

（ａ）

（ｂ）

Heading Marker

Stern Marker

．７５

．２５

ＨＵ

FT: Feet

FM: Fathom

i) EBL Mode Setting Mode of EBL

REL: Relative bearing from HM

TRUE: True bearing

MAG: Magnetic bearing

j) WayPoint Mode Setting WayPoint bearing mode

TRUE: True bearing

MAG: Magnetic bearing

k) Heading Source Setting Heading source;

NMEA

SIN/COS: Compass Data with SIN/COS signal

12BIT: Compass Data with 12bits serial signal

10BIT: Compass Data with 10bits serial signal

l) Heading Type Heading Information Type setting

MAG: Magnetic bearing

TRUE: True bearing

m) Cross cursor position display Mode

DIST/BRG: Range and Bearing indication

LAT/LON: Latitude and Longitude indication

n) Transmitting pulse width Pulse setting for Rang (Note: )

Note: P TABLE PUSLE TYPE 0.5NM 0.75NM 1.5NM 3NM 6NM

P TABLE 0 SHORT 00001

LONG 00112

P TABLE 1 SHORT 00011

LONG 01122

P TABLE 2 SHORT 00111

LONG 11222

Note1： Pulse width 0 : 0.12uS, 1 : 0.3uS, 2 : 0.8uS

Note2： The pulse width for 0.125 to 0.25NM Ranges are always 0.12us.

Note3： The pulse width for 12NM and 24NM Ranges are always 0.8us.

5.5.4.5.3 Changing the content of settings 2 (PRESET2)

Refer to the section, “Changing the content of setting 1(PRESET1)”.

a) Guard Zone Level Guard Zone Detection Level setting

1: High Sensitivity, .. 7: Big Target Only

b) Guard Zone Mode Guard Zone Detection Mode setting

IN: Detect Target in

OUT: Detect Target dissapear

c) Hold Hold the radar picture for 30 seconds after switch to ST'BY

The EBL and VRM can be used in HOLD state.(Note1: )

d) Display Unit Mode Display Unit Operation Mode setting

RDR: Radar mode(normal)

MONI: Monitor mode(for slave display use)

NAV: Navigation mode(for DATA indicator use)

e) External Buzzer External Buzzer control setting

OFF: Buzzer off

CONT: Continuous tone

INT: Intermittent tone

f) Bearing pulse/rot.(IN) Change the setting when connected to the other type of radar

g) Bearing pulse/rot.(OUT) Change the setting when connected to the other type of radar

h) Built-in simulator switch for Demonstration

i) Interference Rejection Reject the interference from the other radar

OFF: IR OFF

IR1: ON level 1

IR2: ON level 2

（ａ）

a) Guard Zone Level

b) Guard Zone Mode

c) Hold

d) Display Unit Mode

e) External Buzzer

ｆ） Bearing pulse/rot(IN)

g) Bearing pulse/rot(OUT)

h) Built-in Simulator

i) Interference Rejection

j) Ship's Speed

k) Indication Language

ＰＲＥＳＥＴ２

ＧＺＬＶＬ１２３４５６７

ＧＺＭＯＤＥＩＮＯＵＴ

ＨＯＬＤＯＮＯＦＦ

ＤＩＳＰＬＡＹ RDR ＭＯＮＩＮＡＶ

ＥＸＴＢＵＺＯＦＦＣＯＮＴＩＮＴ

ＩＮＰ／Ｒ１０８０１０２４２０４８４０９６３６０

ＯＵＴＰ／Ｒ１０８０１０２４２０４８４０９６３６０

ＤＥＭＯＯＮＯＦＦ

ＩＲＯＦＦＩＲ１ＩＲ２

ＳＰＤＳＥＴＮＭＥＡＭＡＮＵ０．０ＫＴ

ＬＡＮＧＵＡＧＥＣＨＩＤＡＮＥＮＧＦＲＥＧＥＲ

ＧＲＥＩＴＡＪＰＮＫＯＲＮＯＲ

ＰＯＲＲＵＳＳＰＡＳＷＥＴＵＲ

ＰＲＥＳＳＥＮＴＥＲＫＥＹＴＯＲＥＴＵＲＮ

j) Ship's Speed Own ship's speed setting

NMEA: Data input from NMEA port

NAMU: Set ship's speed with manual

Set the Speed with control knob.

k) Indication Language Select the language for MENU and SOFT KEY( Note2: )

Note1:

HOLD function POWER ＝ POWER key to press

HOLD is function which you want to hold the currently displayed radar screen conditions while

standby state. After finished operation such as EBL, VRM about 30 seconds, the screen return to

standby screen.

Setting HOLD POWER （Operation）

▽ ▽

（Under Tx） ------------------------------------------- △＜―――――Under HOLD

mode―＞△＜―――――ST’BY DISPLAY―――

Turn to transmission off

EBL,VRM operation:Ｘ seconds Ｘ＋30seconds

（Time used）

NOTE) EBL and VRM function is usable in HOLD state.

Note2:

15 languages

CHI : Chinese KOR : Korean

DAN : Danish NOR : Norwegian

ENG : English POR : Portuguese

FRE : French RUS : Russian

GER : German SPA : Spanish

GRE : Greek SWE : Swedish

ITA : Italian TUR : Turkish

JPN : Japanese

ＳＴ‘Ｂ

HOLD

“HOLD” is displayed and blink

Tx OFF

Ｘ＋３０

Setting

HOLD

EBLs and VRMs can be used

for measuring target data.

5.5.4.5.4 Changing the content of settings (ADJUST)

The items in the ADJUST menu are ones that need adjustment at the time of installation. The

settings need not normally be altered.

(1) Adjusting distance (TIMING ADJ)

This adjustment is necessary to adjust the distance on the radar screen to the actual distance.

(1) In preparation for adjusting the distance, the following adjustments are to be conducted.

First, set the radar range to 0.25 NM, FTC to minimum, and GAIN to optimum. Then adjust STC

until the pulse generated by your own radar appearing at the center of the screen is clearly

recognized as a round dot.

(2) Adjusting the distance.

(2)-1 Select ADJUST by "common operations for CUSTOM", use up-down cursor keys to select

TIMING ADJ from among the pull-down display items and press the "ENT" key.

(2)-2 As the distance adjustment screen is displayed, adjust timing until the center dot looks as

(b) with the control knob. If there is a linear target such as a bridge or breakwater, adjust

timing until the target appears straight in the screen.

(2)-3 When the adjustment is finished, press the "ENT" key to exit from the distance

adjustment screen.

Up/Down →ENT →Control knob →ENT

select TIMIG ADJ Timing adjustment finished

(2) Adjusting angle (HEAD ADJ)

This adjustment is necessary to adjust the head direction on the screen to the actual direction of

the ship.

(1) In preparation for adjusting the angle, the following adjustments are to be conducted.

(1)-1 Find one small target within a 0.5 to 1.5 NM range which, lying in the bow direction, can be

detected with eyes and is clearly visible in the radar screen.

(1)-2 Measure the bearing of this target from the bow direction using a compass. Let it be θc.

(1)-3 Measure the bearing of the above target in head up (HU) mode using EBL. Let it be θr.

(1)-4 Calculate the following:

θc - θr： if θc is greater than θr

360 - ( θr - θc ) ： if θr is greater than θc

a) Too far b) Correct c) Too shrunk

This is the azimuth error of your radar at installation. If θc and θr are equal, the

adjustment described below is unnecessary.

(2) Adjustment method

(2)-1 Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys to

select HEAD ADJ from among the pull-down display items and press the "ENT" key.

(2)-2 As the distance adjustment screen is displayed, set the value to the azimuth error you

have calculated above with the control knob.

(2)-3 When the adjustment is finished, press the "ENT" key to exit from the distance

adjustment screen.

Up/Down −＞ ENT −＞ Control knob −＞ ENT

Select HEAD ADJ. Set a value to .

(3) Adjusting tuning circuit (TUNING CAL)

Normally you do not need to make this adjustment. This adjustment may necessary to ensure

that the automatic tuning circuit operate at its best operating point. However, if sensitivity is poor or

there is any symptom suggesting improper tuning, you may need to adjust this circuit following the

procedure below.

(1) Choose several stable video images in the 3 NM range or more.

(2) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys to select

TUNING CAL. from among the pull-down display items and press the "ENT" key.

(3) As the tuning circuit adjustment screen(TUNING CALIBRATION) is displayed, select AUTO

with up-down cursor key.

(4) While watching video images, adjust until echoes are clearly visible with the control knob.

(5) Select MANUAL with the down cursor key.

(6) Adjust until echoes are clearly visible with the control knob. This set status is middle value of

manual tuning.

HEAD DIRECTION ADJUSTMENT

ADJUST WITH CONTROL KNOB

PRESS ENTER KEY TO RETURN

３５８．８°

HEADING Adjustment

３

１

(7) When the adjustment is finished, press the "ENT" key to exit from the TUNING

CALIBRATION screen.

Operate of (3) to (7)

Up/Down −＞ Control knob −＞ Up/Down −＞ Control knob −＞ ENT

Select AUTO Adjust tuning Select MANU Adjust tuning

(4) Adjusting antenna height (ANTENNA)

Depending on the position at which the antenna is installed, it may be necessary to make the

following correction. (Consult Anritsu or an Anritsu distributor for details.)

(1) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys to select

ANTENNA from among the pull-down display items and press the "ENT" key.

(2) As the adjustment screen is displayed, using the control knob to choose your desired value from

1 to 9.

(3) Press the "ENT" key to exit from the adjusting antenna height screen.

Up/Down −＞ ENT −＞ Control knob −＞ ENT

Select ANTENNA Choose value Complete

Adjust with control knob

Select with up-down

cursor key

Echo remain.

TUNING CALIBRATION

READ OPERATION MANUAL

SELECT ITEM WITH ∧∨ KEY

TUNE WITH CONTROL KNOB

PRESS ENTER KEY TO MEMORY

AUTO

MANUAL

３

１

Adjust with Control knob

STC CURVE ADJUSTMENT

ADJUST WITH CONTROL KNOB

PRESS ENTER KEY TO MEMORY

STC CURVE ５

３

１

ANTENNA Adjustment

(5) Setting automatic GAIN circuit (AUTO GAIN)

Here, you set the automatic and manual gain level. Normally, adjust this setting to be slight the

noise echo appears on the screen in AUTO mode.

(1) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys to select

AUTO GAIN from among the pull-down display items and press the "ENT" key.

(2) As the adjustment screen is displayed, using the control knob to choose your desired value from

1 to 30.

(3) Press the "ENT" key to exit from the adjustment screen.

Up/Down −＞ ENT −＞ Control knob −＞ ENT

Select AUTO GAIN Choose value Complete

(6) Setting automatic STC circuit (AUTO STC)

Here, you set the automatic STC and automatic FTC level. Adjust this setting to be slight sea

clutter appears on the screen, when you observe a small target (ex. Small buoy).

(1) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys to select

AUTO STC from among the pull-down display items and press the "ENT" key.

(2) As the adjustment screen is displayed, using the control knob to choose your desired value from

1 to 16.

(3) Press the "ENT" key to exit from the adjustment screen.

Up/Down −＞ ENT −＞ Control knob −＞ ENT

Select AUTO GAIN Choose value Complete

(7) Setting HARBOR STC circuit (HARBOR)

Here, you set the HARBOR STC level. Adjust this setting to be slight sea clutter appears on the

screen, when you observe the land in a bay area at short-distance range.

(1) Select ADJUST by “common operations for CUSTOM”, use the up-down cursor keys to select

HARBOR from among the pull-down display item and press the “ENT” key.

(2) As the adjustment screen is displayed, using the control knob to choose your desired value from

1 to 16.

(3) Press the “ENT” key to exit from the adjustment screen.

Up/Down −＞ ENT −＞ Control knob −＞ ENT

Select HARBOR Choose value Complete

CHAPTER 6. MAINTENANCE AND INSPECTION

Most of maintenance of this radar should be referred to qualified personnel. If radar

has any problem, contact your dealer and tell us that problem.

There are high voltage circuit inside of this radar.

Do not attempt to open the rear cover of display unit

or disassemble internal parts. When you open the

radome, power must be off.

Even power switch is OFF, this radar is still sup-

plied power inside.

The followings table shows the maintenance by user. Please check periodically.

Tab. 6-1 Maintenance

*: Use grease for plastics for RA775UA. If you use other type of grease(not for plastics), it

may break antenna

Concerning Consumable

The radar uses consumable as listed below that require periodic replacement.

(1) Magnetron

This part is mounted in the scanner unit. If distant echo images have be-

come less visible, the magnetron probably may have degraded. In such a case,

replace it. Consult your distributor for replacement of this part.

Period of the replacement : 3000hour(typ.) (500hour guarantee)

(2) LCD back-light

This part is mounted in the display unit. If the display screen is ex-

tremely dark and its illumination cannot be corrected by adjusting brightness,

the LCD back-light may be faulty or may have burnt out. In such a case, replace

it. Consult your distributor for replacement of this part.

Period of the replacement : 15000hour(typ.) (1000hour at 0℃)

Inspection Interval Inspection Item Method of Inspection and Maintenance

3-6 months Rust and looseness

in scanner unit Check whether the scanner’s fitting bolts are

corroded or less.

Display screen of

LCD display Clean filter and LCD screen surfaces with a soft

and wet cloth.

6-12 months Grease* application

to antenna drive

gear

Apply an even coating of grease* to the entire

surface of the antenna drive gear with a spatula

or brush.

Check for contact of

connectors Check whether connectors are contacted prop-

erly. If any connector is improperly contacted or

stained, correct it by using a contact restoring

chemical agent or by polishing or replace with a

new one if necessary.

!WARNING

(3) Fuse

The fuse is built in

the power supply cable. If

the fuse appears to be

blown, check the fuse. If

blown, replace it following

the procedure shown in

Fig.6-2.

Push

Power supply cable

Wire(White)

Turn counterclockwise

and pull

Fuse

Spring

Push and turn clockwise

Replace new fuse

To display unit

Fig. 6-2 Method for replacing fuse

CHAPTER 7. TROUBLESHOOTING

This chapter explains how to identify trouble locations when the radar is found faulty

and how to request repair.

It happens any disorder, keep pressing POWER key for 3 sec. to power off. Then wait

over 10 sec., when you power on again.

If you find the radar is faulty, check it the following procedure described below. If you

find as a result of inspection that the fault cannot be repaired on board, contact your dis-

tributor or Anritsu for repair.

For faster service, please let us know about followings when you request repair:

(1) Ship's name, place of anchorage, allowable repair period or time

(2) Radar type (This radar is RA775UA.)

(3) Manufacturing number (indicated on the back of the display unit)

(4) Fault symptoms and inspection results

There are high voltage circuit inside of this radar.

Do not attempt to open the rear cover of display unit

or disassemble internal parts. When you open the

radome for installation, power must be off.

Even power switch is OFF, this radar is still sup-

plied power inside.

This chapter explains how to identify trouble locations when the radar is found faulty

and how to request repair.

●7.1 Fault Diagnosis by Self-check

The radar incorporates a failure diagnostic function (called "self-check") to diagnose

faults by the equipment itself.

Please refer to "5.5.4.4 Fault Diagnosis by Self Check (SYSTEM CHECK)

and check

whether there is any fault in your radar.

!WARNING

●7.2 Inspecting Each Part

When you have finished self-check, inspect each part of the radar according to Tab.7-1.

Tab. 7-1 Troubleshooting

Symptom Cause Corrective action

(1) Radar cannot be powered on. Power cable is disconnected. Connect power cable correctly.

Power supply voltage is off

specified value Use Specified power supply. (See

Section 3.2)

Fuse in power cable is blown. Replace fuse. (See Chapter 6)

(2) Nothing is displayed although

radar is powered on. Brightness or contrast are im-

properly adjustment. Use BRIL key to adjust. (See

Section 5.3.)

LCD is faulty. Contact your dealer.

(3) Screen is dark. Brightness is improperly ad-

justed. Use BRIL key to adjust. (See

Section 5.3.

Backlight is faulty. Contact your dealer.

(4) Video does not appear al-

though characters are displayed. Interconnecting cable is out of

place. Connect interconnecting cable

correctly.

(5) Echo image on screen differs

from actual image. Ship’s heading is incorrectly set. Set ship’s heading correctly. (See

Section 5.5.4.5.4)

Timing adjustment is incorrectly

set. Set timing adjustment correctly.

(See Section 5.5.4.5.4)

(6) Echo images are blurred. GAIN, STC, or FTC is improp-

erly set. Adjust. (See Section 5.3.6 to

5.3.8.)

Magnetron has degraded. Contact your dealer.

(7) Too much noise. Radar is not tuned correctly Adjust TUNE. (See Section

5.5.3.4)

Radar is not grounded to earth. Connect grounding wire. (See

Section 3.4 to 3.6.)

(8) Not responded when key is

pressed. Panel keys are not contacting. Contact your dealer.

Power supply circuit is faulty. Contact your dealer.

CHAPTER 8. PRODUCT SPECIFICATIONS

●8.1 General

Type: RA775UA

Power supply voltage and power consumption

Power supply voltage: 24Vdc (nominal)

(10.2 to 41.6 Vdc)

Power consumption: 55 W or less

Distance range: 0.125 to 24 NM, 9 ranges

(Continual variable range also

possible)

Distance resolution: Within 30 m

Distance accuracy: Better than 0.9% of maximum

range of the scale in use, or 8m,

whichever is the greater

Minimum detecting distance: Within 30 m

Bearing resolution: Within 7.5°

Bearing accuracy: 1° or less

Warm-up time: 2 minutes

Environment conditions

Ambient temperature range (S/U): -25 to 55 °C

(D/U): 0 to 55 °C

Humidity: 93% RH at +40 °C

Vibration: (S/U): 3mm(300∼500rpm),

1.2mm(500∼1500rpm),

0.3mm(1500∼3000rpm)

14.7m/s2(1.5G) Resonance test

(D/U): 3mm(300∼500rpm)

0. 75mm(500∼1500rpm)

0.2mm(1500∼3000rpm)

Wind resistance: 100 knots (max.)

Waterproof standard: (D/U): IPX-5

(S/U): CFR-46

Interconnecting cable: 30 m (max.)

Noise: 65 dB or less

●8.2 Scanner Unit

Type: RB714A

Antenna type: Parabolic

Antenna characteristics

Beam width (horizontal): 6.0° ± 1.0°

Beam width (vertical): 25° (typ.)

Pulse width and peak power output: Pulse width(us) Peak Power(kW)

0.12 ± 0.02 1.5(±50%)

0.3 ± 0.05 2.0(±50%)

0.8 ± 0.1 2.0(±50%)

Radio wave type and frequency: P0N, 9445 ± 30 MHz

Antenna revolution: 24 rpm ± 20%

Transmit/receive switching: Magic T and limiter type

Intermediate frequency: 60 MHz

(logarithmic amplifier)

Noise figure: 6.5 dB or less

●8.3 Display Unit

Type: RF718A

Indication system: PPI, PPI+semi-3D,

Split radar range

Indicator: 10-inch monochrome LCD

640 x 480 dots

Monochrome 4 gray levels

Cursor Control: Analog cursor key

and rotary encoder

VRM: 2 lines (One line can be offset.)

Unit of distance can be

selected from NM, KM, and

SM.

EBL: 2 lines (One line can be offset.)

Display modes: HU, HS, NU, CU, and TM

Off-center: Can be 100% off-centered over

the full range.

Guard zone: Can be set at any desired

distance and angle in any

desired width. IN and OUT

modes are available.

Stretch: 2 modes

Echo track: 15, 30 sec, 1, 3, 6 min. and

Continuous.

Other functions: Interference rejection, Zoom,

Sleep mode,

Hold mode, Course error

display,

Parallel cursors, Stern marker,

and Navigation data display

mode

Panel brightness: 4 levels

Language support: Chinese, Danish, English,

French, German, Greek,

Italian, Japanese, Korean,

Norwegian, Portuguese,

Russian, Spanish, Swedish,

and Turkish

●8.4 External Interface

NMEA0183: 2 channels

(One standard channel;

Optional cable is required for

2nd-channel connections)

L / L GGA, GLL, RMA, RMC

Heading HDT, HDG, HDM, HSC,

VHW, VTG

Speed VHW, VTG, RMA, RMC

Way point RMB, BEC, BWC,

BWR, BER, BPI

Depth DBT, DPT

Course error RMB, XTE

Seawater temperature MTW

Others (using optional cable):

External buzzer control output, Auxiliary indicator connecting signal

output and input, Bow direction signal input(SIN/COS signals), and

compass interface (10/12 bits serial)

●8.5 Standard set

Display unit 1

Scanner unit 1

Display cover 1

Fuse 1 set

Interconnecting cable 1 (10m)

Power supply cable 1 (2m)

M10 hexagonal bolt 4 sets

●8.6 Options

Interconnecting cable (15, 20, and 30 m)

Flush-mount installation kit

Junction box for external connection (with cable 1.5m)

Option connector kit 249J153058

●8.7 External dimensions and weight

See APPENDIX

●8.8 External Interface

X1 Connector for Option

pin No. Name function

1NMEA2-A NMEA ch2 data input(A)

19 NMEA2-B NMEA ch2 data input(B)

2GND

20 EXBUZ+ Output for External Buzzer

3EXBUZ- Output for External Buzzer

controlled ship's power output

21 VIDEO_IN Video input for Monitor operation

0 to -1V negative video, Zi = 50ohm

4VIDEO_OUT Video output for External Monitor

0 to -1V negative video, Zo = 50ohm

22 GND

5TRIG_IN Trigger signal input for Monitor operation

0 to 5V positive pulse, rising edge

23 TRIG_OUT Trigger output for External Monitor

0 to 5V positive pulse, rising edge

6SHF_IN Heading signal input for Monitor operation

0 to 5V negative pulse, falling edge

24 SHF_OUT Heading signal output for External Monitor

0 to 5V negative pulse, falling edge

7AZI_IN Bearing Pulse input for Monitor operation

0 to 5V positive pulse, rising edge

25 AZI_OUT Bearing Pulse output for External Monitor

0 to 5V positive pulse, rising edge

8GND

26 GYRCK+ Gyro Interface clock(+) input

9GYRCK- Gyro Interface clock(-) input

apply 5V pulse between (+) and (-), isolated

27 GYRDT+ Gyro Interface data(+) input

10 GYRDT- Gyro Interface data(-) input

apply 5V pulse between (+) and (-), isolated

28 GND

X1 Connector for Option(continued)

pin No. Name function

11 MARK_I External Marker signal input, ex) Radar Buoy

negative video, 0 to -1V Zi = 50ohm

29 +12V External interface power, 100mA max.

12 SIN Compass Interface for SIN/COS type

30 COS Compass Interface for SIN/COS type

13 REF Compass Interface for SIN/COS type

SIN/COS signal: SIN = REF+/-1V, COS = REF+/-1V

31 -- not used

14 GND

32 NMEA_OUT NMEA data output, ex) MOB data, TARGET data

24W160941

ANRITSU CORP.

DEP

APPLICATION REVISIONS

Ａ

Ｂ

Ｃ

Ｄ

Ｅ

DRAWING NO.

24W160941 -00

NOTEFINISHMATERIALDESCRIPTIONPART NO.QTY

TITLE

RA775UA GENERAL SYSTEM DIAGRAM

SCALE

／

APPROVED BY DRAWN BY

TRACED BY CHECKED BY

ITEM

SCANNER

UNIT

RB714A

DISPLAY

UNIT

RF718A

DC Power

Supply

10.2∼41.6Vdc

(Option I/F)

Note 1. 点線はオプション

: Option

NMEA I/F

for

Navigation

Inter-Connection Cable

(10m standard)

Power supply Cable

7 July H.Iida

7 July Y.Aso

24W160939

ANRITSU CORP.

DEP

APPLICATION REVISIONS

Ａ

Ｂ

Ｃ

Ｄ

Ｅ

DRAWING NO.

24W160939 - 00

NOTEFINISHMATERIALDESCRIPTIONPART NO.QTY

TITLE

RA775UA INTER-CONNECTION DIAGRAM

SCALE

／

APPROVED BY DRAWN BY

TRACED BY CHECKED BY

ITEM

SCANNER

UNIT

DISPLAY

UNIT

SCAN PCB (X1)

1 17 VIOLET +250V

4 17 YELLOW GND

2 17 BLUE +24V

5 RED DAT

43 ORANGE3 +12V

7 BROWN BP/SHF

6 Braid of RED DAT-R

Color Function

POWER PCB (X3)

17 VIOLET

17 BLUE

43 ORANGE

Color

17 YELLOW

Braid of RED

RED

BROWN

Braid of BROWN

GRAY

Braid of GRAY

Function

+250V

+24V

+12V

GND

DAT-R

DAT

BP/SHF

BP/SHF-R

V/TRG

V/TRG-R

9 GRAY V/TRG

8 Braid of BROWN BP/SHF-R

10 Braid of GRAY V/TRG-R

7 July H.Iida

7 July Y.Aso

Index

Adjustment

Distance ....................................73

Angle .........................................73

Tuning.......................................74

Antenna height..........................75

Automatic gain..........................76

Automatic STC..........................76

ALL PPI Screen...................................62

ALL PPI/PPI Screen............................62

Bearing scale.......................................25

Brightness ...........................................28

Brightness of Panel...................28

Buzzer..................................................69

Changing setting (CUSTOM)..............66

Check box ............................................67

Continual variable range (VAR RNG).36,48

Contrast...............................................28

Course error (XTE)..............................27

Cross cursor (+)...................................25

Display modes (MODE).......................36,50

EBL ...................................................33,44

Bearing of EBL (EBL BRG).......69

Echo Menu...........................................54

False echoes.........................................5

FL VRM, FL EBL ................................34,45

FTC ...................................................32,55

Gain ...................................................31,54

Guard zone (GZ)..................................36,51

Guard zone mode (GZ MODE)..71

Guard zone level (GZ LVL) .......71

Heading marker ..................................6

Heading Off (HDG OFF)...........36,47

Heading blink (HM FLSH)........69

Heading information (HEAD)...27

Hold (HOLD).......................................71

Language.............................................71

Mark Line............................................49

Menu bar.............................................43

Man Over Board (MOB) ......................32

MOB Screen.........................................63

Monitor operation (DISPLAY).............71

Nav (Navigation) Menu.......................50

Navigation screen................................27

North mark (NORTH M)....................6,69

Off-center (OFF-C)..............................37,52

Option.................................................84

Parallel cursor (///CSR).......................36,47

PPI Screen...........................................60

PPI/NAV Screen..................................62

PPI/PPI Screen....................................61

PPI/SEMI3D Screen............................61

Pulse table (P TABLE)........................69

Radar interference..............................6

Radar screen.......................................25

Range..................................................30

Range rings (RINGS)..........................36,48

Range ring interval...................48

Reverse screen ....................................40,63

Semi-3D ..............................................41,61

Sleep (SLEEP).....................................52

Speed (SPEED, SPD SET)..................71

ST'BY..................................................28

ST'BY NAV screen..............................69

STC ..................................................31,55

Stern marker (STERN M)...................69

Stretch (ST).........................................39,55

Switching the screen (SEL WIN)........40,63

System check .....................................64

Target (TARGET)................................49

Track (TRACK)...................................39,56

Tune ..................................................38,55

Tune meter .........................................25

VAR RNG............................................36,48

VRM ..................................................33,45

Unit of VRM (RM UNIT)..........69

Way point (WAYP)..............................27

Bearing of Way point (WP BRG) ... 69

XTE ..................................................27

Zoom (ZOOM) .....................................39,57

Anritsu 6DXRA775UA Marine Radar RA775UA User Manual 0 TITLE

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