Koden MDC-1041 User manual

KODEN ELECTRONICS CO.,LTD.
5278 UENOHARA, UENOHARA-MACHI,KITATSURU-GUN
YAMANASHI, 409-0112, JAPAN
TEL: [phone]
FAX: [phone]
http://www.koden-electronics.co.jp/
OPERATION MANUAL
COLOR RADAR
MDC-1041/1040/1060/1010
93142022- 03
2001 VI TC 0.05Z1
2002 III TC 0.03Z5
PRINTED IN JAPAN

MDC-1041/1040/1060/1010 OPERATION MANUAL – 03 i
To prevent the risk of personal injury or damage to the equipment, the following safety
symbols are used to indicate safety-related information. Be sure that you clearly un-
derstand 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
serious 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 lo-
cations 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
on 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.
MDC-1041/1040/1060/1010
Color LCD Radar
Operation Manual
Safety Symbols
DANGER
!
WARNING
!
CAUTION
!

ii MDC-1041/1040/1060/1010 OPERATION MANUAL – 03
WARNING and CAUTION for Scanner Unit and Antenna;
1 Do not approach the antenna while it is transmitting.
In addition, at inspection never look into the wave-guide during transmission.
Distance at which RF power density level to become 100 W/m
2
0.8 m
Distance at which RF power density level to become 10 W/m
2
: 8 m
2 There is a risk of receiving electric shock if these parts are touched by accident.
Only qualified personnel should remove covers on these parts.
WARNING for Display Unit;
There is a risk of receiving electric shock if these parts are touched by accident.
Only qualified personnel should remove covers on these parts.
For Safety
1 2

MDC-1041/1040/1060/1010 OPERATION MANUAL – 03 iii
Installation
Read and understand the manual thoroughly before installing this unit.
To The User
* Read and follow the operation and maintenance procedures in this manual. Note that this
equipment is only a navigational aid. There is no warranty for navigational safety. It is no sub-
stitute for prudent navigational procedure and should not be relied on solely for passage.
* If this equipment does not operate properly, immediately turn off the power switch and disconnect
the main power supply. Notify your authorized Simrad dealer or technical service center as soon
as possible.
* The liquid crystal display as well as some of the internal components of this radar can be dam-
aged by dropping or excessive force due to impact. Mount the unit so that it will not be subject to
these forces.
* Mercury (Hg) is used in the LCD backlight. When the unit is taken out of service, it should be
disposed of according to local regulations regarding hazardous materials.

iv MDC-1041/1040/1060/1010 OPERATION MANUAL – 03
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 radar? ---------------------------------------------------------------------------------2
2.2 Characteristics of Radar Wave ------------------------------------------------------------3
2.3 Terms Specific to Radars -------------------------------------------------------------------6
CHAPTER 3 INSTALLATION.............................................................. 9
3.1 Checking Inventory ----------------------------------------------------------------------------9
3.2 Checking Power Supply Voltage --------------------------------------------------------- 10
3.2.1 Power Supply Requirement---------------------------------------------------------------------------------- 10
3.2.2 Fuse Replacement --------------------------------------------------------------------------------------------- 10
3.3 Where to install the Scanner -------------------------------------------------------------- 11
3.3.1 Scanner unit ----------------------------------------------------------------------------------------------------- 11
3.3.2 Display unit------------------------------------------------------------------------------------------------------- 11
3.3.3 Shifting away from obstacles -------------------------------------------------------------------------------- 12
3.4 Installing Scanner Unit ---------------------------------------------------------------------- 13
3.5 Installing Antenna Unit ---------------------------------------------------------------------- 15
3.6 Installing Display Unit ----------------------------------------------------------------------- 15
3.7 Connecting Cables--------------------------------------------------------------------------- 16
3.7.1 Interconnecting cable (Radome scanner) ---------------------------------------------------------------- 16
3.7.2 Interconnecting cable (Open scanner) -------------------------------------------------------------------- 18
3.7.3 Grounding wire--------------------------------------------------------------------------------------------------19
3.7.4 Power supply cable -------------------------------------------------------------------------------------------- 20
3.8 Adjustment------------------------------------------------------------------------------------- 20
3.9 Connecting External Equipment to Display Unit-------------------------------------- 21
3.10 Countermeasure for Electromagnetic Interference ---------------------------------- 21
3.11 When Discarding Your Radar ------------------------------------------------------------- 22
CHAPTER 4 FUNCTIONS AND NAMES .......................................... 23
4.1 Key layout-------------------------------------------------------------------------------------- 23
4.2 Rear panel ------------------------------------------------------------------------------------- 24
4.3 Radar screen (Single screen) ------------------------------------------------------------- 24
4.4 Radar screen (Dual screen) --------------------------------------------------------------- 25
4.5 Radar screen (All PPI screen) ------------------------------------------------------------ 25
4.6 Radar screen (All PPI/PPI screen)------------------------------------------------------- 26
4.7 Navigation screen ---------------------------------------------------------------------------- 26

MDC-1041/1040/1060/1010 OPERATION MANUAL – 03 v
CHAPTER 5 OPERATION .................................................................27
Basic operation of Radar ------------------------------------------------------------------------- 27
5.1 Powering ON and OFF --------------------------------------------------------------------- 27
5.2 Adjusting brilliance of the screen, and key-backlight ------------------------------- 27
5.3 Basic Operations----------------------------------------------------------------------------- 28
5.3.1 Turning On and Off -------------------------------------------------------------------------------------------- 28
5.3.2 Transmitting ----------------------------------------------------------------------------------------------------- 28
5.3.3 Adjusting brilliance of the screen, and key-backlight-------------------------------------------------- 28
5.3.4 Changing the range scale (RANGE UP, RANGE DOWN)------------------------------------------- 29
5.3.5 Automatic adjustment (AUTO)------------------------------------------------------------------------------ 29
5.3.6 Sensitivity adjustment (GAIN)------------------------------------------------------------------------------- 29
5.3.7 Removing Sea clutter (STC) -------------------------------------------------------------------------------- 30
5.3.8 Removing rain and snow clutter (FTC) ------------------------------------------------------------------- 30
5.3.9 Person Over Board (POB)----------------------------------------------------------------------------------- 31
5.4 Soft Key Functions -------------------------------------------------------------------------- 32
5.4.1 Bearing measurement (EBL1) ------------------------------------------------------------------------------ 32
5.4.2 Bearing measurement (EBL2) ------------------------------------------------------------------------------ 32
5.4.3 Distance measurement (VRM1)---------------------------------------------------------------------------- 32
5.4.4 Distance measurement (VRM2)---------------------------------------------------------------------------- 32
5.4.5 Measuring the angle between two points (FL EBL2)-------------------------------------------------- 32
5.4.6 Measuring the distance between two points (FL VRM2) --------------------------------------------- 33
5.4.7 Changing the Soft Key function grouping (NEXT) ----------------------------------------------------- 33
5.4.8 Temporarily erasing heading marker (HDG OFF) ----------------------------------------------------- 34
5.4.9 Using parallel cursor (///CSR)------------------------------------------------------------------------------- 34
5.4.10 Establishment of the indication of the RANGE RINGS (RINGS) ----------------------------------- 34
5.4.11 Variable range function (VAR RNG) ---------------------------------------------------------------------- 34
5.4.12 Changing the display modes (MODE) -------------------------------------------------------------------- 34
5.4.13 Guard Zone (GZ)----------------------------------------------------------------------------------------------- 34
5.4.14 Off Center (OFF-C)-------------------------------------------------------------------------------------------- 34
5.4.15 Setting the SLEEP mode (SLEEP) ------------------------------------------------------------------------ 35
5.4.16 Tuning adjustment (TUNE) ---------------------------------------------------------------------------------- 35
5.4.17 Echo expansion (ST)------------------------------------------------------------------------------------------ 35
5.4.18 Displaying track of targets (TRACK) ---------------------------------------------------------------------- 36
5.4.19 Enlarging a selected area (ZOOM) ------------------------------------------------------------------------ 36
5.4.20 Increasing transmitter average power (S/L) ------------------------------------------------------------- 36
5.4.21 Switching the screen (SEL WIN) --------------------------------------------------------------------------- 36
5.4.22 Reversing the screen color (PICTURE) ------------------------------------------------------------------ 37
5.4.23 Change to PPI screen (PPI)--------------------------------------------------------------------------------- 37
5.4.24 Change to SEMI3D/PPI screen (SEMI3D)--------------------------------------------------------------- 37
5.4.25 Change to PPI/PPI screen (PPI/PPI)---------------------------------------------------------------------- 37
5.4.26 Change to PPI/NAV screen (PPI/NAV) ------------------------------------------------------------------- 37
5.4.27 Change to ALL PPI screen (ALL PPI)--------------------------------------------------------------------- 38
5.4.28 Change to ALL PPI/PPI screen (ALL PPI2) ------------------------------------------------------------- 38
5.5 MENU Operation------------------------------------------------------------------------------- 39
List of MENU--------------------------------------------------------------------------------------------------------------- 39
5.5.1 Mark Menu---------------------------------------------------------------------------------------------------------- 40
5.5.1.1 Bearing measurement (EBL1)---------------------------------------------------------------------------------------------------40
5.5.1.2 Determining distance (VRM1) ---------------------------------------------------------------------------------------------------40
5.5.1.3 Bearing measurement (EBL2)---------------------------------------------------------------------------------------------------41
5.5.1.4 Determining distance (VRM2) ---------------------------------------------------------------------------------------------------41
5.5.1.5 Measuring the distance between two points (VRM2, FL VRM2)--------------------------------------------------------41
5.5.1.6 Measuring the angle between two points (EBL2, FL EBL2)--------------------------------------------------------------41
5.5.1.7 Erasing the heading marker temporarily (HDG OFF)----------------------------------------------------------------------42
5.5.1.8 Using parallel cursors (///CSR) --------------------------------------------------------------------------------------------------42

vi MDC-1041/1040/1060/1010 OPERATION MANUAL – 03
5.5.1.9 Establishment of the indication of the RANGE RINGS (RINGS) ------------------------------------------------------- 42
5.5.1.10 Variable range function (VAR RNG)------------------------------------------------------------------------------------------- 43
5.5.1.11 Output the position of the cursor location to another NMEA device (TARGET) ------------------------------------ 43
5.5.1.12 Determine the distance and bearing to a marker (+MK LINE) ---------------------------------------------------------- 43
5.5.2 Nav (Navigation) Menu---------------------------------------------------------------------------------------- 45
5.5.2.1 Changing display mode (MODE) ---------------------------------------------------------------------------------------------- 45
5.5.2.2 Guard Zone (GZ) ------------------------------------------------------------------------------------------------------------------- 45
5.5.2.3 Off centering the screen display (OFF-C) ------------------------------------------------------------------------------------ 46
5.5.2.4 Setting the SLEEP function (SLEEP)------------------------------------------------------------------------------------------ 46
5.5.2.5 Activating Automatic Tracking Aid (ATA) : Option-------------------------------------------------------------------------- 47
5.5.3 Echo Menu ------------------------------------------------------------------------------------------------------- 48
5.5.3.1 Sensitivity adjustment (GAIN) --------------------------------------------------------------------------------------------------- 48
5.5.3.2 Removing Sea clutter (STC)----------------------------------------------------------------------------------------------------- 48
5.5.3.3 Removing rain and snow clutter (FTC)---------------------------------------------------------------------------------------- 49
5.5.3.4 Adjusting receiver tuning (TUNE) ---------------------------------------------------------------------------------------------- 49
5.5.3.5 Echo expansion (ST) -------------------------------------------------------------------------------------------------------------- 49
5.5.3.6 Displaying track of targets (TRACK)------------------------------------------------------------------------------------------- 50
5.5.3.7 Enlarging a selected area (ZOOM) -------------------------------------------------------------------------------------------- 50
5.5.3.8 Increasing average transmitter power (S/L) --------------------------------------------------------------------------------- 51
5.5.4 SETUP Menu---------------------------------------------------------------------------------------------------- 52
5.5.4.1 Selecting the screen display (WINDOW)------------------------------------------------------------------------------------- 52
Funtions Available On Each Screen------------------------------------------------------------------------------------------- 52
Screen Modes and Operations-------------------------------------------------------------------------------------------------- 53
(a) PPI Screen------------------------------------------------------------------------------------------------------------------------- 53
(b) PPI/SEMI3D Screen------------------------------------------------------------------------------------------------------------- 53
(c) PPI/PPI Screen ------------------------------------------------------------------------------------------------------------------- 53
(d) PPI/NAV Screen------------------------------------------------------------------------------------------------------------------ 54
(e) ALL PPI Screen------------------------------------------------------------------------------------------------------------------- 54
(f) ALL PPI/PPI Screen------------------------------------------------------------------------------------------------------------- 54
(g) POB Screen ----------------------------------------------------------------------------------------------------------------------- 54
5.5.4.2 Switching screens on PPI/PPI screen (SEL WIN)-------------------------------------------------------------------------- 55
5.5.4.3 Color of the screen (PICTURE)------------------------------------------------------------------------------------------------- 55
5.5.4.4 Slave Display Operation ---------------------------------------------------------------------------------------------------------- 55
5.5.4.5 Fault Diagnosis by Self Check (SYSTEM CHECK)------------------------------------------------------------------------ 55
5.5.4.6 Changing the custom setting (CUSTOM) ------------------------------------------------------------------------------------ 57
5.5.4.6.1 Changing the settings of the soft keys (KEY ASSIGN) ----------------------------------------------------------------- 57
5.5.4.6.2 Changing the settings in PRESET1 screen ------------------------------------------------------------------------------- 59
5.5.4.6.3 Changing the settings in PRESET2 screen ------------------------------------------------------------------------------- 61
HOLD function -------------------------------------------------------------------------------------------------------------------- 62
5.5.4.6.4 Changing the content of priority for NMEA input (NMEA PRESET)------------------------------------------------- 63
5.5.4.6.5 Initial adjustment settings (ADJUSTMENT) ------------------------------------------------------------------------------- 63
(1) Adjusting the distance (TIMING ADJ)--------------------------------------------------------------------------------------- 63
(2) Adjusting the angle (HEAD ADJ)--------------------------------------------------------------------------------------------- 64
(3) Adjusting tuning circuit (TUNING CAL)------------------------------------------------------------------------------------- 64
(4) Adjusting the antenna height (ANTENNA)--------------------------------------------------------------------------------- 65
(5) Setting automatic GAIN circuit (GAIN)-------------------------------------------------------------------------------------- 66
(6) Setting automatic STC circuit (STC) ---------------------------------------------------------------------------------------- 66
(7) Setting HARBOR STC circuit (HARBOR)---------------------------------------------------------------------------------- 67
CHAPTER 6 MAINTENANCE AND INSPECTION............................ 68

MDC-1041/1040/1060/1010 OPERATION MANUAL – 03 vii
CHAPTER 7 TROUBLESHOOTING..................................................70
7.1 Fault Diagnosis by Self-check ------------------------------------------------------------ 70
7.2 Inspecting Each Part------------------------------------------------------------------------ 70
CHAPTER 8 PRODUCT SPECIFICATIONS .....................................72
8.1 General----------------------------------------------------------------------------------------- 72
8.2 Scanner Unit ---------------------------------------------------------------------------------- 73
8.3 Display Unit ----------------------------------------------------------------------------------- 73
8.4 External Interface ---------------------------------------------------------------------------- 74
8.5 Standard set ---------------------------------------------------------------------------------- 75
8.6 Options ----------------------------------------------------------------------------------------- 75
8.7 External dimensions and weight --------------------------------------------------------- 75
8.8 External connection and function -------------------------------------------------------- 75
APPENDIX ...........................................................................................77
1. MDC-1041 GENERAL SYSTEM DIAGRAM--------------------------------------------------------------- 77
2. MDC-1040 GENERAL SYSTEM DIAGRAM--------------------------------------------------------------- 77
3. MDC-1060 GENERAL SYSTEM DIAGRAM--------------------------------------------------------------- 78
4. MDC-1010 GENERAL SYSTEM DIAGRAM--------------------------------------------------------------- 78
5. INTERCONNECTION DIAGRAM --------------------------------------------------------------------------- 79
6. OUTLINE DRAWING DISPLAY UNIT MRD-97/97B E42BG11000* --------------- 80
7. OUTLINE DRAWING SCANNER UNIT RB715A 23W72647*------------------- 81
8. OUTLINE DRAWING SCANNER UNIT RB716A E38BG52000* --------------- 82
9. OUTLINE DRAWING SCANNER UNIT RB717A/718A E38BG62000* --------------- 83
10. FLUSH MOUNT PROCEDURE E42BG11020* --------------- 84
INDEX
RB715A TEMPLATE OF SCANNER MOUNTING HOLES (ACTUAL SIZE)

MDC-1041/1040/1060/1010 OPERATION MANUAL – 03 1
CHAPTER 1 OVERVIEW
1.1 Introduction
The RADAR is a compact marine radar that delivers a peak antenna power output of either 4
kW (MDC-1041/1040), 6 kW (MDC-1060) or 12 kW (MDC-1010) and has a 10.4-inch color 640 x
480 liquid crystal display. It uses a microcomputer and a video signal processing LSI chip
specifically designed for radars to deliver high performance and a wide range of features.
Features
1. The LCD allows for a thin case, permitting installation in tight quarters.
2. Minimal keys and menu screens mean you can easily learn to use the radar.
3. On screen soft key functions are user assignable.
4. Continuously variable adjustments are done with a rotary knob.
4. The dual range mode allows you to see short and long-range echoes simultaneously.
5. The Semi-3D display allows for easy identification of targets in noise.
6. A variable range function allows for smooth range changes, not in steps.
7. Waterproof construction (IPX-5) of the display allows installation on open boats.
1.2 Organization of This Manual
This manual provides information for both the novice and experienced user to install, operate
and maintain the RADAR. Please read it thoroughly so you can take full advantage of its ad-
vanced functions. If you are using radar for the first time, begin with the background infor-
mation on how radar works in CHAPTER 2.
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

2 MDC-1041/1040/1060/1010 OPERATION MANUAL – 03
CHAPTER 2. USING RADAR FOR
THE FIRST TIME
This chapter covers basic information and technical terms about radar for those who are using one
for the first time.
2.1 What is radar?
The word "radar" is an acronym for "RAdio Detecting And Ranging." In very simple terms, this is
how it works. A radio transmitter sends a quick microwave pulse, and then a receiver listens for
that signal's echo when it is bounced back from something in its path. The returning signal is
processed by a computer to determine its relative distance, position and bearing. This information
is graphically displayed on a screen for you to see. Other boats or ships, navigational markers,
landmasses and such are referred to as targets.
By knowing how long it takes for a signal to return, the distance to a target can be determined. As
the radar antenna scans through a 360-degree rotation, it can show where the target is relative to
your position. By repeated scans, you can see which direction another vessel is moving.
Fig.2-1 What is radar?
Antenna
How radar will perform is largely determined by its antenna or scanner. Increasing the size of the
antenna improves long-range performance and target discrimination, or the ability to distinguish
two separate targets at a distance. The critical factors are the antenna's beam width and side lobe
level. Typically, a radar antenna will radiate a tightly focused beam from the front of the array.
The longer the antenna array is, the narrower the beam width will be. Additionally, it will also
emit smaller amounts of energy to each side. The lower the side lobe level, the less the effect of a
false echo. The MDC-1041 radars are equipped with a closed dome scanner; the
MDC-1040/1060/1010 has a larger, open array.
Side lobe
The beam in which the strongest radio signal is radiated from
the antenna is called the “main lobe”. Those beams that are
radiated in other directions are referred to as the “side lobes”.
The side lobe level refers to the difference in level (signal
strength) between the largest side lobe and the main lobe.
Fig.2-2 Antenna pattern
Buo
y
Other shi
p
Radar wave
Your shi
p
A
ntenna
Radar dis
p
la
y
Beam width
Side lobe
level
Main beam
Side lobe
Antenna

MDC-1041/1040/1060/1010 OPERATION MANUAL – 03 3
2.2 Characteristics of Radar Wave
Radio waves travel out from the antenna while bending slightly along the earth's surface. The
amount they bend depends on atmospheric conditions. The sight distance of a radar generally is
about 6% longer than the optical sight distance and is calculated using this equation:
Radar sight distance (NM) = 2.22 ( antenna height (m) + target height (m) )
Fig.2-3 Radar wave
Targets difficult to display on screen
The intensity of the reflected radio signal from a target depends on the distance, height, and size of
the target, as well as its material and shape, along with the radar’s transmitter power output and
antenna size. Targets made of fiberglass, wood, or other low-reflectance materials or those that
have a small incident angle are difficult to display on a screen. Sandy beaches, and sandy or
muddy shallows can be difficult to catch. Because there's not much to reflect a signal back to you, a
coastline can actually be closer to your boat than it appears on the screen.
Fig.2-4 Targets difficult to display on screen
Shadow zones of radar
Radar waves propagate in a straight line. A high outcropping of land or a large ship will create a
shadow zone behind it and prevent you from seeing targets on the other side. More importantly, if
a mast or some part of the boat's superstructure is in the path of the antenna's sweep, this will also
create a shadow zone. No targets will be recognized behind it and it could create a dangerous
situation.
False echoes
Sometimes radar will display targets on screen that do not exist in the real world. You should be
aware of how and why this happens.
A. Ghost echoes
Sometimes one large object very near your boat will appear as two different targets onscreen. One
is the actual radar echo. The other is a ghost echo generated by a re-reflection of the original
signal. It comes back to your own boat, bounces back to the target, then is picked up by the an-
h1 h2
Line of sight
Radar Radio
Wave
Earth
Apparent coastline
Actual(invisible)
coastline
Invisible
Visible
3
1
HU

4 MDC-1041/1040/1060/1010 OPERATION MANUAL – 03
tenna on the second bounce. The actual echo appears at the correct distance and bearing on the
screen. The ghost echo appears somewhere behind your boat. This type of false echo is also gen-
erated by re-reflection of waves from bridges, quay walls or building along shore.
Fig.2-5 False echoes of radar (Ghost echoes)
B. Multiple echoes
If there is a large vertical reflecting surface near your boat, as in the case when you pass alongside
a large ship, radar signals are repeatedly bounced back and forth between your boat and the other
object. Two to four images appear on the screen at equal intervals in the same bearing. This is
called a multiple echo. The image appearing closest to you is the real echo. Multiple echoes will
disappear as you move away from the reflecting object or its bearing changes.
Fig.2-6 False echoes of radar (Multiple echoes)
C. False echoes caused by side lobe
An antenna's side lobe emissions are low power, and will not register distant targets. However, if
there is a strong reflecting target near your boat, it sometimes may appear as a circular-arc false
echo on the screen.
When near large targets or land, your boat's mast
may sometimes appear as a circular-arc shaped
false echo.
CAUTION
!
Target
Direct reflection
path
Secondary
reflection path
Mast etc.
Real echo
Ghost echo
Direction of ghost echo
3
1
HU
3
1
HU
Real echo
Multiple
echoes

MDC-1041/1040/1060/1010 OPERATION MANUAL – 03 5
Fig.2-7 False echoes of radar (Caused by side lobe)
D. Distant false echoes caused by duct phenomenon
The duct phenomenon sometimes occurs when meteorological conditions create a temperature
inversion between layers of air. When this happens, radar waves propagate erratically and can
reach a location considerably farther away from your boat than the radar's maximum distance
range. What appears onscreen is a false echo that looks to be nearer than the actual target. Since
the true echo from the distant target is outside the measurement capabilities of the radar, its ap-
parent distance will change when you change ranges, and you can conclude that it's a false echo.
Radar interference
If another boat's radar is operating on the same frequency as yours, it can create interference on
your display. The interference usually appears as spiral or radial patterns. The RADAR has two
levels of interference rejection control to eliminate interference. Turn it on to reduce or eliminate
the interference.
Fig.2-8 Radar interference
3
1
HU
Antenna
Main beam
Side lobes
Real echo
False sidelobe
echoes
3
1
HU
Radar inrterference

6 MDC-1041/1040/1060/1010 OPERATION MANUAL – 03
2.3 Terms Specific to Radar
HM (Heading Marker)
This is a line-shaped marker used to indicate the forward direction
of your boat.
North Mark
The marker to indicate the direction North is a short line ap-
proximately 1/6 of the screen size. It only appears when the radar is
connected to a suitable heading source provided through NMEA,
10/12 bit serial or sin/cos.
Fig.2-9 Heading Marker and North Mark
Display modes
The RA40/41/42/43/44 has four display modes. Each refers to the top of the screen as it relates to
the direction of your boat's travel.
Fig.2-10 Display modes
Head Up (HU)
The heads up mode corresponds with your current heading and shows what's directly in front of
you at the top of the screen. It gives you the position of other targets around you relative to your
boat.
North Up (NU)
In this mode, North is at the top of the screen. This allows you to compare your position with a
chart as you navigate. Heading data input is required for this mode to function.
Course Up (CU)
This is similar to North up except that your boat's destination is at the top of the screen. A straight
line from the bottom to top of the screen is your course bearing.
0.75
0.25
HU
HM(Heading Marker)
North Mark
Ship's
Heading
North
Scheduled
course
HM
EBL
North
mark
HU NU CU TM
Ship's locus
(not displayed on screen)
North
North
Scheduled
course
0.75 0.75 0.75
0.25
TM
0.25
CU
0.25
NU
0.25
HU
0.75

MDC-1041/1040/1060/1010 OPERATION MANUAL – 03 7
True Motion (TM)
In this mode, the boat icon is displayed as if it is moving on a marine chart while targets such as
islands and seashores are fixed in position. When the icon reaches a certain position on the screen
(approx. 2/3 of screen size), it is placed back on the opposite side on the screen. North is at the top
of the screen. External heading and speed data are needed for this mode.
VRM (Variable Range Marker)
This adjustable circular-shaped marker can be used to determine the distance of a target from your
boat. When measuring be certain to move the VRM to a point close to the center of the echo image
on the screen.
Fig.2-11 VRM
EBL (Electronic Bearing Line)
This straight-line marker can be rotated in any direction centered on your boat's position. Use the
EBL to indicate the advancing direction of your boat and its relative angle with a target.
Fig.2-12 EBL
VRM
Echo
0.75
0.25
HU
VRM
0.75
0.25
HU
EBL
Echo
EBL
Equal intervals

8 MDC-1041/1040/1060/1010 OPERATION MANUAL – 03
STC (Sensitivity Time Control)
Since echo signals received by the radar are stronger when they are coming from a short distance,
it's difficult to compare signal strength between each reflected signal. To overcome this, signal
strength is adjusted in such a way that the received signal levels coming from a short distance are
lowered. This is helpful when there are large reflected waves from sea surfaces during rough
weather.
Fig.2-13 STC
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.
Fig.2-14 FTC
PPI (Plan Position Indicator)
A display system of radar. Reflected radar signal is displayed in plan.
0.75
0.25
HU
STC OFF STC ON
0.75
0.25
HU
Echo is suppressed
around center
0.75
0.25
HU
FTC OFF FTC ON
0.75
0.25
HU
Small noises
are reduced.

MDC-1041/1040/1060/1010 OPERATION MANUAL – 03 9
CHAPTER 3. INSTALLATION
This chapter shows how to install the RADAR on your boat and the precautions you'll need to
observe.
3.1 Checking Inventory ____________________________________
Carefully unpack the box and check to see that all components are present.
MDC-1041 MDC-1040 MDC-1060 MDC-1010
Item Q'TY Q'TY Q'TY Q'TY
Display unit 1 (MRD-97) 1 (MRD-97) 1 (MRD-97B) 1 (MRD-97B)
Scanner unit 1 (RB715A) 1 (RB716A) 1 (RB717A) 1 (RB718A)
Display cover 1 1 1 1
Fuse 2 4 4 4
Interconnecting cable 1 (10 m) 1 (10 m) 1 (10 m) 1 (10 m)
Power supply cable 1 (2 m) 1 (2 m) 1 (2 m) 1 (2 m)
M10 hexagonal bolt 4 sets 0 0 0
M12 hexagonal bolt 0 4 sets 4 sets 4 sets
Carbon brush 0 2 2 2
Your unit was shipped with a 10m interconnecting cable. 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

10 MDC-1041/1040/1060/1010 OPERATION MANUAL – 03
Tab.3-1 Optional Interconnecting Cable
You'll need to supply the following hardware:
Item QTY Remarks
Tapping screw or M5 bolt and nut 6 sets To install display unit
Grounding wire 1 Earth 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
Tab.3-2 shows the power requirements for the RADAR. If the unit is supplied with less than
the specified voltage, it won't operate properly. Keep in mind that when the unit is initially
powered on there will be a peak current surge. Check all circuits back to the power source
for correct wire gauge and tight connections.
Tab.3-2 Power Supply Requirements
*A.C. power cannot be used
3.2.2 Fuse Replacement
CAUTION: Use only exact replacements .
Tab.3-3 Supply Voltage vs. Main Fuse Ratings
Supply voltage used
MDC-1041 MDC-1040 MDC-1060/1010
DC12V 10A/250V or 125V (6.3Φx 32mm)
DC24V
8A/250V or 125V *
(6.3Φx 32mm)
8A/250V or 125V * (6.3Φx 32mm)
15A/250V or 125V *
(6.3Φx 32mm)
Tab.3-4 Supply Voltage vs. Motor Fuse Ratings
Supply voltage used
MDC-1041 MDC-1040 MDC-1060/1010
DC12V 5A/250V or 125V (5Φx 20mm)
DC24V
T3.15A/250V or 125V *
(5Φx 20mm)
T3.15A/250V or 125V * (5Φx 20mm)
T3.15A/250V or 125V *
(5Φx 20mm)
Note: A fuse with an asterisk (*) is fitted as standard.
MDC-1041 MDC-1040/1060/1010
Cable length Product No. Product No.
15m 242J158055B 242J159098B
20m 242J158055C 242J159098C
30m 242J158055D 242J159098D
Supply voltage used Maximum current Allowable range of voltage
MDC-1041/1040/ MDC-1060/1010
DC12V 5A 8A 10.2-41.6V
DC24V 2.5A 4A 10.2-41.6V

MDC-1041/1040/1060/1010 OPERATION MANUAL – 03 11
3.3 Where to Install the Scanner______________________________
3.3.1 Scanner unit
Radar's target detection ability increases with the height of the scanner. The ideal location is
as high as possible along the boat's keel line and clear of any obstructions.
(a) Install the scanner as high as possible.
Consider the structural support of the location. Will it hold the weight of the scanner?
How difficult will it be to get to the scanner for maintenance?
(b) Install the scanner away from masts.
If the scanner is installed at the same height as a mast, radar waves may be blocked,
creating shadow zones or generating false echoes.
(c) Install the scanner forward of obstacles.
If you can't avoid an obstacle, place the scanner on the bow side of it. When installing the
scanner on a mast, position it in front of the mast. (If obstacles cannot be avoided for
structural reasons, refer to "Shifting away from obstacles" in Section 3.3.3.)
(d) Do not install the scanner near hot or heat-generating items.
Do not install the scanner where it may be subjected to smoke or hot air from exhausts or
heat from lights.
(e) Install the scanner away from other antennas.
Keep it as far as possible from the antennas of other electronic equipment.
Radar scanners will cause interference with radio
transceivers. Keep them as far apart as possible
(f) Keep 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 need a longer cable, limit the length to a maximum of 100 m.
3.3.2 Display unit
The display unit can be installed in a helm console, bulkhead, or electronics box. Consider
these suggestions:
(a) A place where you can see the boat's bow when looking straight up from the radar screen.
(b) A place where there is no direct sunlight to avoid display temperature buildup.
(c) A place where there is good ventilation and minimum vibration.
(d) A place where the display unit is more than the minimum safe distance from a magnetic compass as listed in Tab.3-5
below.
Tab.3-5 Minimum Safe Distance from Magnetic Compass
Standard compass Steering compass
Scanner unit 2.0m 1.4m
Display unit 2.0m 1.4m
!
CAUTION

12 MDC-1041/1040/1060/1010 OPERATION MANUAL – 03
3.3.3 Shifting away from obstacles
cShifting from keel line
By shifting the scanner position from the keel line to the starboard side of the boat, it is pos-
sible to move shadow zones to the port side. This makes it possible to keep a clear view to the
bow. The distance to be shifted can calculate using the following 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
Fig.3-1 Shifting from keel line
dObtaining sufficient dip angle
Raise the scanner position so that there is a sufficient dip angle θavailable between 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.
Fig.3-2 Obtaining sufficient dip angle
Ls
R
D
Scanner Unit Obstacle
Keel line
Horizontal line
Line of si
g
ht
θ