Koden MDC-2900 User manual

Declaration of Conformity
(As required by Article 6.3 of Directive 1999/5/EC-RTTE Directive)
Declares under his sole responsibility that the produced Marine Radar System manufactured
by
Koden Electronics Co., Ltd.
5278 Uenohara
Uenohara-Shi,
Yamanashi-Ken
409-0112
Japan
Telephone [phone] Telefax [phone]
Intended for Worldwide use as a Marine Radar for use aboard non-SOLAS vessels and
identified by the type number MDC-2960 / MDC-2910 / MDC-2920 to which this
declaration refers has been tested to the essential radio test suites required by the notified
body and is in conformity with the standards
EN 60945 : 2002 ( Clauses 9,10 & 12 )
EN 62252 : 2004 ( Clauses 4.8, 4.33, 5.8, 5.33 and Annex D )
ITU-R Recommendation RM.1177
and complies with the essential requirements of Directive 1999/5/EC
Conformity procedure under Annex IV of 1999/5/EC (Technical Construction file) has been
undertaken by
QinetiQ Ltd. Cody Technology Park Ively Road, Farnborough GU14 0LX. United Kingdom
The Technical Construction File is held by Mr Heinz Hoghoff at
Koden Elektronik GmbH,
Am Gewerbepark 15,
D-64823 Gross-Umstadt / Hessen
Germany
Telephone [phone] Telefax [phone]
Kenichi Chiwaki, QA Manager.
Koden Electronics Co., Ltd.
02 Feb. 2009

Declaration of Conformity
(As required by Article 6.3 of Directive 1999/5/EC-RTTE Directive)
Declares under his sole responsibility that the produced Marine Radar System manufactured
by
Koden Electronics Co., Ltd.
5278 Uenohara
Uenohara-Shi,
Yamanashi-Ken
409-0112
Japan
Telephone [phone] Telefax [phone]
Intended for Worldwide use as a Marine Radar for use aboard non-SOLAS vessels and
identified by the type number MDC-2960BB / MDC-2910BB / MDC-2920BB to which
this declaration refers has been tested to the essential radio test suites required by the notified
body and is in conformity with the standards
EN 60945 : 2002 ( Clauses 9,10 & 12 )
EN 62252 : 2004 ( Clauses 4.8, 4.33, 5.8, 5.33 and Annex D )
ITU-R Recommendation RM.1177
and complies with the essential requirements of Directive 1999/5/EC
Conformity procedure under Annex IV of 1999/5/EC (Technical Construction file) has been
undertaken by
QinetiQ Ltd. Cody Technology Park Ively Road, Farnborough GU14 0LX. United Kingdom
The Technical Construction File is held by Mr Heinz Hoghoff at
Koden Elektronik GmbH,
Am Gewerbepark 15,
D-64823 Gross-Umstadt / Hessen
Germany
Telephone [phone] Telefax [phone]
Kenichi Chiwaki, QA Manager.
Koden Electronics Co., Ltd.
02 Feb. 2009

MDC-2900 Series
0093129012-00
MDC-2900 Series Operation Manual
Doc No: 0093129012
Revision history in document
No. Document No./
Version No.
Revised
Date
Description
0 0093129012-00 2009/03/03 First edition
1
2
3
4
5
6
7
8
9
10
Revision criteria for document number/version number
If any contents of the document has been revised, the version number is altered on the cover
sheet and corresponding chapter revised, while the other chapters remain unchanged. The
document number is designated lower right in the cover sheet and at the left or right part of every
footer.
Prohibition of copy/reprint
No part of this manual shall be reprinted or copied by any means without written permission by
Koden Electronics Co., Ltd.
Disclaimer
The specifications and technical issues described in this manual are subject to change without
notice. Koden Electronics Co., Ltd. has no responsibility for any human and physical damage or
failure caused by the interpretive error of this manual.

MDC-2900 Series Table of Contents
0093129012-00 i
Contents
Chapter 1 Preface....................................................................................................................................1-1
1.1 About this operation manual..........................................................................1-1
1.2 For safety usage..............................................................................................1-2
1.3 Disposal of used cell and this radar..............................................................1-3
Treatment of the used lithium ion cell............................................................... 1-3
Disposal of this radar ....................................................................................... 1-3
1.4 Principal features of this radar.......................................................................1-4
Chapter 2 Adjustment in installation..........................................................................................2-1
2.1 Menu usage......................................................................................................2-1
2.2 Tuning method.................................................................................................2-1
Auto tuning ....................................................................................................... 2-1
Manual tuning................................................................................................... 2-1
2.3 Picture bearing adjustment (HL OFFSET).....................................................2-2
2.4 Adjustment of transmitting delay time (TX DELAY)......................................2-3
2.5 Setup antenna height......................................................................................2-4
2.6 Setup antenna cable length............................................................................2-4
2.7 Setup of MBS value.........................................................................................2-4
2.8 Setup own ship profile (Cannot use on transmitting)..................................2-5
2.9 Inside save of setup data at the time of setting up (Cannot use while
transmitting) ....................................................................................................2-6
2.10 External save of setup (Cannot use on transmitting)...................................2-7
Chapter 3 Basic operation [for operating unit (panel)]...................................................3-1
3.1 Name of radar display.....................................................................................3-1
*1 STAB MODE................................................................................................ 3-2
3.2 Illustration of operating unit (panel) ..............................................................3-3
3.3 Power On/Off ...................................................................................................3-4
Power On ......................................................................................................... 3-4
Power Off ......................................................................................................... 3-4
3.4 Change brilliance of display unit ...................................................................3-5
Change display brilliance ................................................................................. 3-5
Change lighting of operating panel illumination................................................ 3-5
3.5 Transmission ...................................................................................................3-5
Start transmission............................................................................................. 3-5
Stop transmission............................................................................................. 3-5
3.6 Change range (indicated distance)................................................................3-6

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0093129012-00ii
*About bearing scale ........................................................................................ 3-6
3.7 Adjust receiver gain (GAIN)........................................................................... 3-7
3.8 Reject sea clutter (anti-SEA)........................................................................... 3-8
Selection of MAN SEA and AUTO SEA ............................................................ 3-8
AUTO adjustment of the SEA........................................................................... 3-8
Manual adjustment of the SEA ......................................................................... 3-9
3.9 Reject rain/snow clutter (anti-RAIN)............................................................ 3-10
Changing method of CFAR and DIFF............................................................. 3-10
CFAR adjustment ........................................................................................... 3-11
RAIN DIFF adjustment ................................................................................... 3-12
3.10 Change transmission pulse length (SP/LP)................................................ 3-13
3.11 Measure distance and bearing of a target .................................................. 3-14
Measure distance (VRM: Variable Range Maker)........................................... 3-14
Measure bearing (EBL: Electronic Bearing Line)............................................ 3-15
Measure distance/bearing (PI: Parallel index line).......................................... 3-16
Measure distance/bearing (ERBL: Electronic range and bearing line) ........... 3-18
3.12 Change echo color (Day/Night) ................................................................... 3-19
3.13 Remove the heading line.............................................................................. 3-19
3.14 Relocate antenna position (Off-centering) ................................................. 3-20
3.15 Select screen display (Display mode)......................................................... 3-21
For H UP (Head up mode).............................................................................. 3-21
For C UP (Course up mode)........................................................................... 3-21
For N UP (North up mode).............................................................................. 3-22
For relative motion (RM) and true motion (TM)............................................... 3-23
Reset true motion ........................................................................................... 3-24
3.16 F (Function key) usage................................................................................. 3-25
Chapter 4 Primary operations (For menu)..............................................................................4-1
4.1 Menu usage..................................................................................................... 4-1
Display and remove menu................................................................................ 4-1
Select menu item.............................................................................................. 4-1
4.2 Radar signal correlation (PROCESS)............................................................ 4-2
4.3 Enhance target (ENH)..................................................................................... 4-2
4.4 Interference rejection(IR) ............................................................................... 4-3
4.5 Video mode (VIDEO)....................................................................................... 4-3
4.6 Display ship’s trail.......................................................................................... 4-4
Relative display (R) .......................................................................................... 4-5
True display (T) ................................................................................................ 4-5
4.7 Display range rings (RR)................................................................................ 4-6

MDC-2900 Series Table of Contents
0093129012-00 iii
4.8 Bearing mode set up.......................................................................................4-7
4.9 Echo alarm.......................................................................................................4-8
4.10 Target tracking (TT) / AIS common items....................................................4-10
VECTOR ........................................................................................................ 4-10
CPA/TCPA.......................................................................................................4-11
TGT ID ............................................................................................................4-11
PAST POSN: Past position............................................................................. 4-12
ASSOCIATION............................................................................................... 4-13
Setup area...................................................................................................... 4-14
INPUT RNG: Input range ............................................................................... 4-15
AUTO ACQ AREA: Automatic acquisition area .............................................. 4-16
GUARD ZONE ............................................................................................... 4-17
4.11 Target tracking (TT).......................................................................................4-18
Enable TT function ......................................................................................... 4-18
Manual acquisition ......................................................................................... 4-18
Delete target................................................................................................... 4-19
Delete all targets ............................................................................................ 4-19
Reference target acquisition........................................................................... 4-20
Types of tracked target symbol ...................................................................... 4-21
TEST TGT...................................................................................................... 4-22
4.12 AIS4-32
Enable AIS function ........................................................................................ 4-32
Setup display area ......................................................................................... 4-33
ACTIVE / SLEEP............................................................................................ 4-33
FILTER [Sleep targets only]............................................................................ 4-33
AIS AUTO ACQ .............................................................................................. 4-34
Types of AIS target symbol............................................................................. 4-35
Chapter 5 General operation (Menu)..........................................................................................5-1
5.1 RADAR .............................................................................................................5-1
TRAIL TRUE / REL .......................................................................................... 5-1
TRAIL TIME...................................................................................................... 5-1
TRAIL SHAPE .................................................................................................. 5-1
TRAIL DETECT LEVEL.................................................................................... 5-1
TRAIL RESET .................................................................................................. 5-1
OFF CENT POINT ........................................................................................... 5-1
AUTO OFF CENT ............................................................................................ 5-1
TM RESET ....................................................................................................... 5-2
C UP RESET.................................................................................................... 5-2

Table of Contents MDC-2900 Series
0093129012-00iv
5.2 ALARM............................................................................................................. 5-3
ECHO ALARM.................................................................................................. 5-3
ECHO ALARM MODE ...................................................................................... 5-3
ECHO ALARM DETECT LEVEL....................................................................... 5-3
MAP AREA ....................................................................................................... 5-3
MAP AREA DETECT LEVEL ............................................................................ 5-3
CPA / TCPA ...................................................................................................... 5-3
AUTO ACQ....................................................................................................... 5-3
GZ .................................................................................................................... 5-3
AIS SLEEPING LOST ...................................................................................... 5-3
AIS NO HDG / COG ......................................................................................... 5-4
NAVLINE CROSS............................................................................................. 5-4
PRIORITY ........................................................................................................ 5-4
LIST.................................................................................................................. 5-5
HISTORY LIST ................................................................................................. 5-5
5.3 OS / TGT .......................................................................................................... 5-6
VECT TRUE/REL ............................................................................................. 5-6
VECT TIME ...................................................................................................... 5-6
VECT TIME INCREMENT ................................................................................ 5-6
TGT ID DISP .................................................................................................... 5-6
ID DISP SIZE.................................................................................................... 5-6
INTPUT RNG.................................................................................................... 5-6
ASSOCIATION ................................................................................................. 5-6
CHANGE SELECTED TGT .............................................................................. 5-6
SETTING.......................................................................................................... 5-6
AUTO ACQ AREA ............................................................................................ 5-6
STAB INDICATOR ............................................................................................ 5-7
ANT POSN ....................................................................................................... 5-7
PAST TRK TIME............................................................................................... 5-8
PAST TRK TIME INCREMENT......................................................................... 5-9
PAST TRK RESET ........................................................................................... 5-9
STERN LINE .................................................................................................... 5-9
SHIP OUTLINE................................................................................................. 5-9
AIS.................................................................................................................. 5-10
SELECT ID..................................................................................................... 5-10
ACTIVE / SLEEP............................................................................................ 5-10
LABEL ............................................................................................................ 5-10
SHIP OUTLINE............................................................................................... 5-10
HDG LINE ...................................................................................................... 5-10

MDC-2900 Series Table of Contents
0093129012-00 v
TURN INDICATOR......................................................................................... 5-10
CLASS B .........................................................................................................5-11
ATON ..............................................................................................................5-11
SAR (Search and rescue aircraft) ...................................................................5-11
BASE...............................................................................................................5-11
OS DISP..........................................................................................................5-11
MASSAGE DISP .............................................................................................5-11
TT................................................................................................................... 5-12
SELECT ID..................................................................................................... 5-12
ACQ ............................................................................................................... 5-12
DELETE ......................................................................................................... 5-12
ALL DELETE .................................................................................................. 5-12
REF ACQ ....................................................................................................... 5-12
EDIT NAME.................................................................................................... 5-12
TEST TGT...................................................................................................... 5-12
5.4 TOOL ..............................................................................................................5-13
RR.................................................................................................................. 5-13
BRG TRUE/REL............................................................................................. 5-13
CURSOR SHAPE .......................................................................................... 5-13
PI LINE........................................................................................................... 5-13
LINE DISP...................................................................................................... 5-13
LINE START RNG.......................................................................................... 5-13
LINE END RNG.............................................................................................. 5-13
PI DISP SIDE ................................................................................................. 5-13
EBL1 OFFSET ............................................................................................... 5-14
EBL2 OFFSET ............................................................................................... 5-14
5.5 MAP ................................................................................................................5-15
DISP............................................................................................................... 5-15
GROUP .......................................................................................................... 5-15
GROUP COAST LINE.................................................................................... 5-15
GROUP NAV LINE ......................................................................................... 5-16
GROUP ROUTE (Alternate planned route) .................................................... 5-16
GROUP EVENT MARK.................................................................................. 5-16
GROUP AREA ............................................................................................... 5-17
EDIT COAST LINE......................................................................................... 5-17
EDIT NAV LINE .............................................................................................. 5-17
EDIT ROUTE (Alternate planned route) ......................................................... 5-17
EDIT EVENT MARK....................................................................................... 5-18
EDIT AREA .................................................................................................... 5-18

Table of Contents MDC-2900 Series
0093129012-00vi
MONITORED ROUTE .................................................................................... 5-18
WPT ID DISP.................................................................................................. 5-18
DATUM ........................................................................................................... 5-18
EDIT USER DATUM ....................................................................................... 5-18
POSITION OFFSET ....................................................................................... 5-19
MAN OFFSET ................................................................................................ 5-19
5.6 BRILL............................................................................................................. 5-20
COLOR........................................................................................................... 5-20
COLOR ECHO ............................................................................................... 5-20
COLOR TRAIL................................................................................................ 5-20
COLOR BKGND PPI ...................................................................................... 5-20
COLOR BKGND DATA ................................................................................... 5-20
COLOR DATA................................................................................................. 5-20
BRIGHTNESS ................................................................................................ 5-20
5.7 SYSTEM......................................................................................................... 5-21
INTER SWITCH (Cannot use while transmitting) ........................................... 5-21
TIME............................................................................................................... 5-23
ASSISTANT DISP .......................................................................................... 5-23
TGT LIST SORT ............................................................................................. 5-24
USER ............................................................................................................. 5-24
EDIT USER NAME ......................................................................................... 5-24
SOUND .......................................................................................................... 5-24
FREQUENCY................................................................................................. 5-24
KEY CLICK..................................................................................................... 5-24
ALARM TEST ................................................................................................. 5-24
PANEL TEST .................................................................................................. 5-24
DIAGNOSE TT ............................................................................................... 5-24
DIAGNOSE AIS.............................................................................................. 5-24
SERIAL SEL ................................................................................................... 5-25
SERIAL MONITOR ......................................................................................... 5-25
ANT MONITOR .............................................................................................. 5-25
TOTAL HOUR................................................................................................. 5-25
TX HOUR ....................................................................................................... 5-25
VERSION ....................................................................................................... 5-25
言語 ................................................................................................................ 5-25
5.8 MAINTENANCE ............................................................................................. 5-26
START UP ...................................................................................................... 5-26
I / O................................................................................................................. 5-27
OS PROFILE (Cannot use while transmitting)................................................ 5-30

MDC-2900 Series Table of Contents
0093129012-00 vii
SECTOR MUTE (Cannot use while transmitting)........................................... 5-31
PRESET......................................................................................................... 5-32
BACKUP (Cannot use while transmitting) ...................................................... 5-36
TOTAL HOUR (Cannot use while transmitting) .............................................. 5-36
TX HOUR (Cannot use while transmitting)..................................................... 5-36
5.9 Menu configuration.......................................................................................5-37
Chapter 6 Specification and configurations..........................................................................6-1
6.1 Antenna and Scanner......................................................................................6-1
6.2 Display unit and processor unit.....................................................................6-1
6.3 Configuration items.........................................................................................6-2
System configuration........................................................................................ 6-2
Option............................................................................................................... 6-3
6.4 External view and dimensions .......................................................................6-4
Chapter 7 Principle of radar system...........................................................................................7-1
7.1 What is radar system?....................................................................................7-1
Side lobe .......................................................................................................... 7-1
Beam width ...................................................................................................... 7-2
7.2 Characteristics of radar radio wave...............................................................7-2
Target hardness reflected................................................................................. 7-2
Radar shadow .................................................................................................. 7-3
False image...................................................................................................... 7-3
7.3 Radar interference...........................................................................................7-5
7.4 Receiving the Radar Beacons, SART and Radar Enhancer.........................7-6
Chapter 8 Simple fault diagnosis..................................................................................................8-1
8.1 No alarm sound ...............................................................................................8-2
8.2 Operation unit (panel) key is not operational................................................8-3
8.3 TT is not operational.......................................................................................8-4
8.4 No AIS display .................................................................................................8-5
8.5 Need to confirm serial input...........................................................................8-6
8.6 No video display..............................................................................................8-7
8.7 Screen is frozen...............................................................................................8-8
8.8 About alarms ...................................................................................................8-9
8.9 Alarm list........................................................................................................8-10

MDC-2900 Series Chapter 1 Preface
0093129012-00 1-1
Chapter 1 Preface
1.1 About this operation manual
This operation manual (hereinafter referred to as “this document”) describes operations and
maintenance of the radar systems MDC-2900 series (hereinafter referred to as “this radar”.)
Please keep this document in the location near the radar to refer at any time when required.
The following symbol is displayed on the important part of safety usage of this radar among this
description. The way as a symbol and the semantics are as follows.
Symbol Meaning
Warning
Mark for warning
This symbol denotes that there is a risk of death or serious injury when
not dealing with it correctly.
Caution
Mark for caution
This symbol denotes that there is a risk of slight injury or damage of
radar when not dealing with it correctly.
Mark for danger high voltage
This symbol denotes that there is a risk of death or serious injury
caused by electric shock when not dealing with it correctly.
Mark for prohibition
This symbol denotes prohibition of the specified conduct. Description of
the prohibition is displayed near the mark.
The following symbol is attached to important information among the descriptions in this document.
Symbol Meaning
IMPORTANT
Mark for important matters
This mark denotes that there is a possibility that data loss may interfere
the operation or that the expected result may not be obtained when not
dealing with it correctly.
Mark for reference
This mark shows the part to be referred related to this description.

Chapter 1 Preface MDC-2900 Series
0093129012-001-2
1.2 For safety usage
Caution
Caution about the rotating aerial
The radar antenna may start to rotate without notice. Please stand clear
from the antenna for your safety.
Caution
Caution about electromagnetic disturbance
The operating antenna & scanner unit radiates high-energy
electromagnetic wave. It may cause harmful effect for human body due
to its continuous irradiation. As International regulation says,
electromagnetic waves less than 100 watt/m2does not have a harmful
effect on human bodies, but some kind of medical radars such as heart
pacemakers are sensitive even under the low energy electromagnetic
wave. Any personnel with such a radar should keep away from the
electromagnetic wave generating position at all times.
Specified power density and distance from the radar (in accordance with
the provision as specified in IEC 60945)
Model name Xmit power/
Antenna length
100W/m250W/m210W/m2
6KW / 4 feet Antenna 1.09m 1.54m 3.46mMDC-2960
MDC-2960BB 6KW / 6 feet Antenna 1.30m 1.84m 4.10m
12KW / 4 feet Antenna 1.55m 2.19m 4.89mMDC-2910
MDC-2910BB 12KW / 6 feet Antenna 1.84m 2.60m 5.81m
25KW / 4 feet Antenna 2.45m 3.46m 7.73mMDC-2920
MDC-2920BB 25KW / 6 feet Antenna 2.82m 3.99m 8.91m
Caution about internal high voltage.
Confirm that the ship’s power source and power supply of this radar is
turned off when doing an internal inspection of this radar.
The maintenance and inspection of these radars should be performed by
qualified technical personnel.
Post the notice of “During inspection” label near the power switch of this
radar during service and inspecting.
High voltage is used inside this radar. This high voltage may remain in
the circuit even after the power switch had turned off.

MDC-2900 Series Chapter 1 Preface
0093129012-00 1-3
1.3 Disposal of used cell and this radar
Warning
A high-energy density lithium ion cell is built in this radar.
Improper disposal of a lithium ion cell is discouraged as the cell has
a possibility of short-circuiting. If it gets wet, the generation of heat,
explosion or ignition may occur resulting in an injury or a fire.
Treatment of the used lithium ion cell
•To dispose of built-in lithium ion cell in this radar, insulate each terminal with scotch tape, etc. and
wrap in plastic bag, etc.
•The disposal and collection rules may be different depending on each municipal district. Obey the
directions of each district.
Disposal of this radar
•This radar shall be disposed according to the municipal regulations or rules.
Warning
Caution against the dust
Please wear a safety mask in the case of cleaning the interior of the
radar. Dust may temporarily cause a disease of the respiratory
system. Be careful not to inhale dust.
Caution
Caution against static electricity
Please handle the printed circuit board only after taking measures
against static electricity. Static electricity occurs from the carpet on
the floor of the cabin, etc. and clothes made of synthetic fiber and
may damage the electronic parts on the printed circuit board.

Chapter 1 Preface MDC-2900 Series
0093129012-001-4
1.4 Principal features of this radar
The MDC-2900 series is a compact and high performance shipboard radar system consisting of the
antenna & scanner unit with a transmit power of 6kW/12kW/25kW, a display unit with a 19 inch color
LCD display and operating panel unit.
For this radar, its multi functions and high performance is accomplished with microcomputer technology
as well as an image processing in the newly developed radar-dedicated LSI.
•A slim display unit using liquid crystal technology.
•Stable indication and reliable acquisition of small target.
•Clear distinction between moving target and land by true trail display.
•Provision of multi targets TT information and the chart display (mandatory or optional).
•Various models for selection of an optimum radar for your needs.
•Simple and easy operation by user-friendly rotating knobs.
•Capable of adjusting gain, anti- sea clutter, anti- rain clutter, bearing cursor, and range marker, etc.
using rotating knobs.
•The waterproof operating panel (IPX2) has a great flexibility in installation.

MDC-2900 Series Chapter 2 Adjustment in installation
0093129012-00 2-1
Chapter 2 Adjustment in installation
2.1 Menu usage
Refer to” Menu usage” (page4-1)
2.2 Tuning method
The transmitted and received frequency of this radar may become detuned by environmental causes.
This results in “off tuning” of the gain and the same image may be hard to be seen, even if the setup is
the same as before.
[Tuning method] can be changed directly in the upper light of the screen without using menu function.
Auto tuning
This function automatically compensates detune caused by environmental changes.
Sometimes, as auto tuning adjusts to optimize strong echo, weak echo may be weaken too much when
strong echo such as from land is received.
Adjust [AUTO ADJ] to optimize value if echo from the object target is week.
[MENU] => [MAINTENANCE] => [STARTUP] => [TUNE AUTO ADJ]
Manual tuning
Perform all adjustments manually.
[MAN ADJ] adjustment is required whenever detuning is occurred by environmental changes.
[MENU] => [MAINTENANCE] => [STARTUP] => [TUNE MAN ADJ]
[MENU] => [RADAR] => [TUNE AUTO ADJ]
Optimized value setup method
Adjustment shall be performed based on stable echo object such as from land. (Land is used in
following explanation.)
1 Set “RAIN”, “SEA” to 0.
2 Weaken Gain until land echo is nearly disappeared.
3 Press [MENU] key, select [MAINTENANCE] => [STARTUP] =>.
4 Adjust [AUTO ADJ] or [MAN ADJ] to get the strongest land echo.
5 Repeat step 2 to 4 then adjustment is completed.

Chapter 2 Adjustment in installation MDC-2900 Series
0093129012-002-2
2.3 Picture bearing adjustment (HL OFFSET)
The bearing on the radar screen is adjusted.
1 Change the range scale to 1 NM or more by pressing “+” (or “-“) key on the transmission display.
2 Select a visible fixed object as far as possible and measure its bearing using magnetic compass or
equivalence. Measure the bearing of the same target on the radar screen. Adjust it according to
the following procedures when both values differ 1 degree or more.
3 Press [MENU] key, select [MAINTENANCE] => [STARTUP] => [HL OFFSET] => VALUE and
indicate the last digit of the input value by highlighted character.
4 Move a trackball up or down to adjust the value to match the bearing value of the target picture to
the compass value.
5 Press [ENTER] key to determine adjustment result.

MDC-2900 Series Chapter 2 Adjustment in installation
0093129012-00 2-3
2.4 Adjustment of transmitting delay time (TX DELAY)
This adjustment is intended to match the picture on a radar window with the distance of an actual target
through adjustment of the transmission delay time. For the purpose of accurate adjustment, a hard,
long, straight object such as a quay wall extended on a near (within about 100m) position is utilized to
produce good result. Transmitting delay time is adjusted in accordance with the following procedures.
1 Change the range scale to 0.125 NM by pressing “+” (or “-“) key on the transmission display.
2 Press [MENU] key, select [MAINTENANCE] => [STARTUP] => [TX DELAY] =>.
3 Move a trackball up or down to adjust the value to get a straight picture of the straight object in
the screen as shown in follow image.
4 Press [ENTER] key to determine adjustment result.
GoodToo near Too far

Chapter 2 Adjustment in installation MDC-2900 Series
0093129012-002-4
2.5 Setup antenna height
Set up antenna installation height from sea level.
Effect of anti sea-clutter varies depending on the above setup.
1 Press [MENU] key to display “Menu”.
Select [MAINTENANCE] => [STARTUP] => [ANT HEIGHT] => and press [ENT] key after selection.
2.6 Setup antenna cable length
Set up antenna cable length.
Improper setting of antenna cable length may result in degraded target detection.
1 Press [MENU] key to display “Menu”.
Select [MAINTENANCE] => [STARTUP] => [ANT CABLE] => and press [ENT] key after selection.
2.7 Setup of MBS value
This setting is utilized to suppress (mute) transmitting leak of small dark circle spot signal at the center
of the display.
1 Set range to 0.125 NM, RAIN knob to 0, SEA knob to 0, GAIN knob to 8, and brilliance to
maximum respectively.
2 Press [MENU] key to display “Menu”.
Select [MAINTENANCE] => [STARTUP] => [MBS] => Value by highlighted character using
trackball.
3 Turn sea knob to display transmitting leak circle at the center of the picture.
Transmitting leak
4 Move a trackball up or down to increase MBS value with observing the center circle. Press
[ENTER] key to determine when the circle has just faded out.