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Chapter 3 TRUE AND FALSE ECHOES ON DISPLAY
3.1 RADAR WAVE WITH THE HORIZON
Chapter 3
TRUE AND FALSE ECHOES ON
DISPLAY
The radar operator has a role of interpreting the radar displays to provide his best aid in
maneuvering the ship.
For this purpose, the operator has to observe the radar displays after fully understanding
the advantages and disadvantages that the radar has.
For better interpretation of radar display, it is important to gain more experiences by
operating the radar equipment in fair weathers and comparing the target ships watched
with the naked eyes and their echoes on the radar display.
The radar is mainly used to monitor the courses of own ship and other ships in open seas,
to check buoys and other nautical marks when entering a port, to measure own shipâs
position in the coastal waters relative to the bearings and ranges of the shore or islands
using a chart, and to monitor the position and movement of a heavy rain if it appears on
INSTRUCTION MANUAL
the radar display. Various types of radar display will be explained below.
3.1 RADAR WAVE WITH THE HORIZON
Radar beam radiation has the nature of propagating nearly along the curved surface of
the earth. The propagation varies with the property of the air layer through which the
radar beam propagates. In the normal propagation, the distance (D) of the radar wave to
the horizon is approximately 10% longer than the distance to the optical horizon. The
distance (D) is given by the following formula:
D=2.23(h1 + h2)(nm)
h1: Height (m) of radar scanner above sea level
h2: Height (m) of a target above sea level
Fig. 3.1-1 is a diagram for determining the maximum detection range of a target that is
limited by the curve of the earth surface in the normal propagation.
Fig. 3.1-1
3-1
Chapter 3 TRUE AND FALSE ECHOES ON DISPLAY
3.1 RADAR WAVE WITH THE HORIZON
When the height of own ship's scanner is 10 m for instance,
(a) A target that can be detected at the radar range of 64 nm on the radar display is
required to have a height of 660 m or more.
(b) If the height of a target is 10 m, the radar range has to be approx. 15 nm.
However, the maximum radar range at which a target can be detected on the
radar display depends upon the size of the target and the weather conditions, that
is, the radar range may increase or decrease depending upon those conditions.
3-2
Chapter 3 TRUE AND FALSE ECHOES ON DISPLAY
3.2 REFLECTION FROM TARGET
3.2 REFLECTION FROM TARGET
The signal intensity reflected from a target depends not only on the height and size of the
target but also on its material and shape. The echo intensity from a higher and larger
target is not always higher in general.
In particular, the echo from a coast line is affected by the geographic conditions of the
coast. If the coast has a very gentle slop, the echo from a mountain of the inland appears
on the radar display, as shown in Fig. 3.2-1. Therefore, the distance to the coast line
should be measured carefully.
Fig. 3.2-1
3-3
INSTRUCTION MANUAL
Chapter 3 TRUE AND FALSE ECHOES ON DISPLAY
3.3 SEA CLUTTER AND RAIN AND SNOW CLUTTER
3.3 SEA CLUTTER AND RAIN AND SNOW
CLUTTER
In addition to the echo required for observing ships and land radar video image also
includes unnecessary echo, such as reflection from waves on the sea surface and
reflection from rain and snow. Reflection from the sea surface is called "sea clutter," and
reflection from rain and snow is called "rain and snow clutter," and those spurious waves
must be eliminated by the clutter rejection function.
3.3.1
SEA CLUTTER
Sea clutter appears as an image radiating outwardly from the center of the radar display
and changing depending on the size and the shape of waves. Generally, as waves become
larger, image level of the sea clutter is intensified and the clutter far away is also
displayed. When waves are large and the sea clutter level is high, it is difficult to
distinguish sea clutter from a small boat whose reflection intensity is weak.
3.3.2
RAIN AND SNOW CLUTTER
Rain and snow clutter is a video image that appears in a location where rain or snow is
falling. The image changes according to the amount of rain (or the amount of snowfall).
As precipitation increases, the image of rain and snow clutter becomes intensified on the
radar display, and in the case of localized heavy rain, an image similar to the image
indicating land is displayed in some cases. Furthermore, because radio waves tend to
attenuate due to rain and snow, the ability to detect a target in the rain and snow clutter
or a target beyond the rain and snow clutter may decrease
3.3.3
COPING WITH SEA CLUTTER AND RAIN AND SNOW
CLUTTER
When the weather is bad and the ocean is rough, reducing the pulse width will reduce the
influence by spurious waves, and also the spurious wave rejection function effectively
works; therefore, the use of short pulse is effective when the weather is bad. By using
image processing functions "3Scan COREL" to "5Scan COREL", it is expected that
spurious waves are further suppressed. Since optimal settings for those items can be
automatically made by using the function mode, it is recommended that STORM or
RAIN be used by selecting the function mode when the weather is bad. For details of the
function mode, see Section "2.14 FUNCTION KEY SETTINGS".
However, these functions may make some targets invisible, particularly targets with
higher speeds.
3-4
Chapter 3 TRUE AND FALSE ECHOES ON DISPLAY
3.4 FALSE ECHOES
3.4 FALSE ECHOES
The radar observer may be embarrassed with some echoes that do not exist actually.
These false echoes appear by the following causes that are well known:
3.4.1
SHADOW
When the radar scanner is installed near a funnel or mast, the echo of a target that exists
in the direction of the funnel or mast cannot appear on the radar display because the
radar beam is reflected on the funnel or mast. Whether there are some false echoes due to
shadows can be checked monitoring the sea clutter returns, in which there may be a part
of weak or no returns. Such shadows appear always in the same directions, which the
operator should have in mind in radar operation.
3.4.2
SIDE LOBE EFFECT
A broken-line circular arc may appear at the same range as the main lobe of the radar
beam on the radar display. This type of false echo can easily be discriminated when a
target echo appears isolated.(See Fig. 3.4-1.)
INSTRUCTION MANUAL
Fig. 3.4-1
3.4.3
FALSE ECHO BY SECONDARY REFLECTION
When a target exists near own ship, two echoes from the single target may appear on the
radar display.
One of those echoes is the direct echo return from the target and the other is the
secondary reflection return from a mast or funnel that stands in the same direction as
shown in Fig. 3.4-2.
3-5
Chapter 3 TRUE AND FALSE ECHOES ON DISPLAY
3.4 FALSE ECHOES
Fig. 3.4-2
Direct microwave
HL
Actual target
Radar
scanner
Funnel
Secondary reflection
of microwave
False echo from funnel
3.4.4
FALSE ECHO BY MULTIPLE REFLECTION
When there is a large structure or ship with a high vertical surface near own ship as
shown in Fig. 3.4-3, multiple refection returns may appear on the radar display. These
echoes appear in the same intervals, of which the nearest echo is the true echo of the
target.
Fig. 3.4-3
3.4.5
SECOND TIME ECHOES
The maximum radar detection range depends upon the height of the scanner and the
height of a target as described in the Section "3.1 RADAR WAVE WITH THE
HORIZON". If a so-called "duct" occurs on the sea surface due to a certain weather
condition, however, the radar beam may propagate to a abnormally long distance, at
which a target may be detected by the radar.
For instance, assuming that the pulse length is MP3 (on the repetition frequency of 1400
Hz), the first pulse is reflected from a target at about 58 NM or more and received during
the next pulse repetition time. In this case, a false echo (second time echo) appears at a
position that is about 58 NM shorter than the actual distance. If the false echo appears at
5 NM on the radar display, the true distance of the target is 5+58=63 NM. On the pulse
3-6
Chapter 3 TRUE AND FALSE ECHOES ON DISPLAY
3.4 FALSE ECHOES
length is SP1 (on the repetition frequency of 2250 Hz), a false echo may appear at a
position that is about 36 NM shorter than the actual distance.
This type of false echo can be discriminated by changing over the range scale (the
repetition frequency), because the distance of the target changes accordingly.
If second time echo is appeared, the use of Economy mode in PRF menu is effective.
Otherwise, Stagger Trigger menu set to on. (Refer to Section "4.6 SCANNER" of
INSTALLATION MANUAL.)
3.4.6
RADAR INTERFERENCE
When another radar equipment using the same frequency band as that on own ship is
near own ship, a radar interference pattern may appear on the radar display. This
interference pattern consists of a number of spots which appear in various forms. In
many cases, these spots do not always appear at the same places, so that they can be
discriminated from the target echoes.(See Fig. 3.4-4.)
Fig. 3.4-4
If radar equipment causing an interference pattern and this radar are of the same model,
their transmitting repetition frequency is nearly the same. As a result, interference
patterns may be displayed concentrically.
In this case, the interference patterns cannot be eliminated by using only the interference
reflector function, so press the [TX/PRF] key several times to fine-tune the transmitting
repetition frequency.
An interference suppressing effect can be heightened by applying a different transmitting
repetition frequency to the interference pattern source radar and this radar.
3-7
INSTRUCTION MANUAL
Chapter 3 TRUE AND FALSE ECHOES ON DISPLAY
3.5 DISPLAY OF RADAR TRANSPONDER (SART)
3.5 DISPLAY OF RADAR TRANSPONDER
(SART)
The SART (Search and rescue Radar Transponder) is a survival device authorized by the
GMDSS (Global Maritime Distress and Safety System), which is used for locating
survivors in case that a distress accident occurs at sea. The SART is designed to operate
in the 9 GHz frequency band. When receiving the 9 GHz radar signal (interrogating
signal) transmitted from the radar equipment on a rescue ship or search aircraft, the
SART transmit a series of response signals to inform the distress position to the rescue
and search party.
Perform the following settings to display SART on the radar screen.
1. Range: 6 NM or 12 NM
2. [SEA] control: Turning to the minimum position (counterclockwise fully)
3. Automatic sea clutter suppression function: Off
4. Tuning function: Off (for less clutter)
5. IR: Off
6. Processing: Off
Note:
z When performing the settings 1 to 6 above to display the SART signal, targets
around own ship will disappear from the radar display. So it is necessary to
exercise full surveillance over the conditions around own ship by visual watch in
order to avoid any collision or stranding.
If two or more sets of radar equipment are installed on own ship, use one set of
9 GHz band radar for detection of the SART signal and operate others as
normal radars for avoiding collision, monitoring targets around own ship, and
checking on own ship's position and avoidance of stranding.
After the detection of SART signal, the radar adjustment is required for general
navigation.
3-8
Chapter 4 MAINTENANCE
4.1 ROUTINE MAINTENANCE
Chapter 4 MAINTENANCE
4.1 ROUTINE MAINTENANCE
DANGER
Never carry out internal inspection or repair work of the equipment
by users.
Inspection or repair work by unauthorized personnel may result in
fire hazard or electric shock.
For inspection and repair work of equipment components, consult
with our branch office, branch shop, sales office, or our distributor
in your district.
When conducting maintenance, make sure to turn the main power
off.
Failure to comply may result in electrocution.
Turn off the main power before cleaning the equipment. Especially
when a rectifier is used, make sure to turn it off since voltage is
still outputted from the rectifier even after the indicator and the
radar are turned off. Failure to comply may result in equipment
failure, or death or serious injury due to electric shock.
INSTRUCTION MANUAL
For operating the radar equipment in the good conditions, it is necessary to make the
maintenance work as described below. If maintenance is made properly, troubles will
reduce. It is recommended to make regular maintenance work.
Common points of maintenance for each unit are as follow:
Clean the equipment.
Remove the dust, dirt, and sea water rest on the equipment cabinet with a piece of dry
cloth. Especially, clean the air vents with a brush for good ventilation.
4-1
Chapter 4 MAINTENANCE
4.2 MAINTENANCE ON EACH UNIT
4.2 MAINTENANCE ON EACH UNIT
4.2.1
SCANNER UNIT NKE-2042, 2043, 2062/HS, 2063/HS,
2103-4/4HS/6/6HS
DANGER
When conducting maintenance work on the antenna, make sure to
turn its main power off.
Failure to comply may result in electrocution or injuries.
Make sure to turn off the antenna operation switch.
Failure to comply may result in injuries caused by physical contact
with the rotating antenna.
Do not touch the radiator. Even if the power is turned off, the
radiator may be rotated by the wind.
After the work, turn "ON" the scanner unit safety switch.
 Precautions in Mounting the Cover
When the cover is removed for regular checkup and replacement of parts and refitted after
such work, the procedures of fastening bolts shall be taken with the following precautions:
y The proper fastening torque of the fitting bolts (M8) is 1176 to 1470 Nâ˘cm (120 to
150kgfâ˘cm) (which makes the inside water-tight and protects the packings against
permanent compressive strain). The packings start producing from the cover at a
torque of approximately 1470Nâ˘cm (150kgfâ˘cm). Do not fasten the bolts with a
torque exceeding the specified value. Otherwise, the screws may be broken.
y Use an offset wrench of 11 mm Ă 13 mm or a double-ended wrench of 13 mm Ă 17
mm (not longer than 200 mm).
y Screw all the bolts by hand first to prevent them playing, then fasten them evenly in
order not to cause one-sided fastening. (Fasten the bolts with 25% of the required
torque at the first step.)
*: Fasten the bolts in the diagonal order.
Őľ
4-M5 (stainless steel) bolt
Tightening torque: 120 to 150 kgf/cm
Őą
Őł
Ő´
Őś
Ő˛
4-2
NKE-2042 Cover Bolt
Tightening Procedure
Chapter 4 MAINTENANCE
4.2 MAINTENANCE ON EACH UNIT
Őľ
4-M5 (stainless steel) bolt
Tightening torque: 120 to 150 kgf/cm
Őą
Őł
Ő´
Őś
Ő˛
NKE-2043 Cover Bolt
Tightening Procedure
4-M8 (stainless steel) bolt
Ő´
Őł
Ő˛
Őą
Tightening torque: 120 to 150 kgf/cm
NKE-2062 Cover Bolt
Tightening Procedure
4-M8 (stainless steel) bolt
Ő˛
Őą
Ő´
Őł
INSTRUCTION MANUAL
Tightening torque: 120 to 150 kgf/cm
NKE-2063/HS Cover Bolt
Tightening Procedure
4-M8 (stainless steel) bolt
Tightening torque: 120 to 150 kgf/cm
Ő´
Ő˛
Őł
NKE-2103-4/4HS/6/6HS Cover
Bolt Tightening Procedure
Őą
4-3
Chapter 4 MAINTENANCE
4.2 MAINTENANCE ON EACH UNIT
 Radiator
Note:
z If the radiator front face (radiation plane) is soiled with smoke, salt, dust, paint or
birdsâ droppings, wipe it with a piece of soft cloth wetted with alcohol or water
and try to keep it clean at all times. Otherwise, radar beam radiation may
attenuate or reflect on it, resulting in deterioration of radar performance.
z Never use solvents of gasoline, benzine, trichloroethylene and ketone for
cleaning.
Otherwise, the radiation plane may deteriorate.
Check up and clean the radiator.
 Rotating section
Oiling gears
Apply grease evenly to the tooth surfaces of the main shaft drive gear and the encoder
drive gear with a spreader or brush. Oiling in short intervals is more effective to prevent
the gears from wear and tear and extend their service life, but oil at least every six
months.
Use the grease of Mobilux 2 of Mobil Oil.
Driving motor
i) Attenuator
Greasing is not necessary unless there is oil leakage.
ii) Motor
The life span of the brush itself is 2000 hours. When the brush is worn out to a half
of the entire length, replace it.
The communicator must be kept clean all the time. If carbon dust is stuck and cannot
be removed with a dry cloth, polish the section with sand paper of No.150 to 400.
The carbon brush can be removed by removing the caps on both sides of the bottom
of the motor.
Spring
4-4
Communicator contact side
Carbon brush
Chapter 4 MAINTENANCE
4.2 MAINTENANCE ON EACH UNIT
Table 4.2-1 List of replacement carbon brushes
Scanner unit
model name
Item name
Model name
Replacement
quantity
JRC code
JMA-3316
Carbon brush
54531-01
BRXP05247
JMA-3336
Carbon brush
54531-01
BRXP05247
Mounting legs
Check the mounting legs and mounting bolts of the scanner unit case for corrosion at
intervals and maintain them to prevent danger. Apply paint to them once a half year
because painting is the best measure against corrosion.
DISPLAY UNIT NCD-2182
WARNING
When cleaning the display screen, do not wipe it too strongly with
a dry cloth. Also, do not use gasoline or thinner to clean the
screen.
Failure to comply will result in damage to the screen surface.
Dust accumulated on the screen will reduce clarity and darken the video.
For cleaning it, wipe it with a piece of soft cloth (flannel or cotton). Do not wipe it
INSTRUCTION MANUAL
4.2.2
strongly with a piece of dry cloth nor use gasoline or thinner.
4-5
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
4.3 PERFORMANCE CHECK
Make operational check on the radar equipment regularly and if any problem is found,
investigate it immediately.
Pay special attention to the high voltage sections in checking and take full care that no
trouble is caused by any error or carelessness in measurement. Take note of the results of
checking, which can be used effectively in the next check work.
Operational check shall be made in accordance with Table 4.3-1 Function Check List in
the order as specified in it.
Table 4.3-1 Function Check List
Equipment
Transmitter-receiver
Unit
Item to be checked
Tuning LED of Receiver
Criteria
The LED is lighting during operation
Video and echoes on the
screen
Sensitivity
LCD brilliance can be
controlled correctly
Can be correctly controlled
Various markers
Various numerical
indications
Lighting
Safety Switch
Various Currents and
Display Unit
Voltages
Communication Lines
Memory
Panel
Checking the Monitor
TEST".
See "â Line Test" in "4.3.8 SELF TEST".
See "â Memory Test" in "4.3.8 SELF
TEST".
See "â Key Test" in "4.3.8 SELF TEST".
See "â Monitor Display Test" in "4.3.8
SELF TEST".
Magnetron Current
See "4.3.4 SCANNER INFORMATION".
Error Logging Display
See 4.3.6 ERROR LOG.
System Information Display
4-6
See "â Sensor Test" in "4.3.8 SELF
See 4.3.2 SYSTEM INFORMATION and
4.3.3 SYSTEM TIME.
Remarks
48NM range
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
4.3.1
TEST MENU
The performance status of this radar equipment can be checked on the Test Menu.
 "Test" operations
1 Open
Test
from the Main Menu.
"Test" menu appears.
4.3.2
SYSTEM INFORMATION
Displays the current system information (software version information).
 "System INFO" operations
1 Open
Test
System Information .
INSTRUCTION MANUAL
The software version is displayed.
4-7
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
4.3.3
SYSTEM TIME
Displays the following system time information.
y Indicator Running Time
y Scanner Transmit Time
y Scanner Motor Time
y Scanner Running Time
 "System Time" operations
1 Open
Test
System Time .
"System Time" menu appears.
4.3.4
SCANNER INFORMATION
Displays the following scanner information.
y Transmitted output power
y Motor Type
y Magnetron Current
 "Scanner Information" operations
1 Open
Test
Scanner INFO .
"Scanner Information" menu appears.
4-8
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
4.3.5
HARDWARE INFORMATION
Displays the following hardware information.
y Serial Number
y MAC Address
y Temperature
 "Hardware Information" operations
1 Open
Test
Hardware Information .
"Hardware Information" menu appears.
4.3.6
ERROR LOG
The error log displays previously occurred system alarms with the dates and times when
they occurred.
1 Open
Test
INSTRUCTION MANUAL
 "Error Log" operations
Error Log .
"Error Log" menu appears.
4-9
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
 Displaying Error Log
1 Open
Error Log
Display .
"Error Log" menu appears.
For details of alarms, refer to "4.5.1 LIST OF ALARMS AND OTHER
INDICATIONS".
 Erasing Error Log
1 Open
Error Log
Erase .
Yes
No
4-10
Erases the error log.
Does not erase the error log.
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
4.3.7
LINE MONITOR
Serial communication data can be seen on the built-in Line monitor.
Line monitor can be used to make sure that the serial data are received properly.
 "Line Monitor" operations
1 Open
Test
Line Monitor .
"Line Monitor" menu appears.
Receive Data:
The received serial communication data are displayed.
Send Data:
The transmitted serial communication data are displayed.
Soft key 1:
GPS
NMEA1
Keyboard
Gyro/Compass
NMEA2
Scanner
Press the soft key 1 to select the port for serial communication data.
Soft key 2:
ASCII
Binary
Press the soft key 2 to switch the display.
Soft key 3:
Stop
Play
Press the soft key 3 to stop/start scrolling.
Soft key 4:
INSTRUCTION MANUAL
Clear
Press the soft key 4 to clear all listed serial communication data.
4-11
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
4.3.8
SELF TEST
The following tests can be performed.
y Key Test
y Buzzer Test
y Key Light Test
y Monitor Display Test
y Memory Test
y Line Test
y Sensor Test
 "Self Test" operations
1 Open
Test
Self Test .
4-12
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
 Key Test
1 Open
Self Test
Key Test .
Operation key video will be displayed.
When pressing each key, the corresponding operation key is color-inverted on the
INSTRUCTION MANUAL
display.
Press the [CLEAR] key to turn off the operation keys.
 Buzzer Test
1 Open
Self Test
Buzzer Test .
The buzzer will sound.
The buzzer automatically stops after it sounds for a certain time.
The buzzer will sound regardless of the buzzer setting.
 Key Light Test
1 Open
Self Test
Key Light Test .
The brightness of the operation panel is gradually intensified.
4-13
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
 Monitor Display Test
1 Open
Self Test
Monitor Display Test .
Pattern1
: All colors are filled with white.
Pattern2
: A white box is displayed on the black background of 1024 Ă 768 dots.
Pattern3
: Displays rectangle Ă 2, circle Ă 2, and cross-shapeĂ 9 (white lines on the
black background).
Pattern4
: Displays "H" of 9 dots Ă 9 dots on the entire screen (white character
on the black background).
Pattern5
: Gray scale display (16 levels)
Pattern6
: Displays a color bar.
Pattern7
: The square figure of a specified RGB value is shown at the center of
the display.
Input the value.
Turn the [MULTI] control to set the value.
The value can be set between 0 and 31.
Operate the same way for the other settings.
4-14
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
 Memory Test
1 Open
Self Test
Memory Test .
When no abnormality is found, "OK" is displayed. When an abnormality is found,
"NG" is displayed.
Reference:
More time may be required for USB detection in order to acquire "OK".
Do not remove USB during memory test.
 Line Test
1 Open
Self Test
Line Test .
When no abnormality is found, "OK" is displayed. When an abnormality is found,
"NG" is displayed.
4-15
INSTRUCTION MANUAL
Chapter 4 MAINTENANCE
4.3 PERFORMANCE CHECK
 Sensor Test
1 Open
Self Test
Sensor Test .
When no abnormality is found, "OK" is displayed. When an abnormality is found,
"NG" is displayed.
4-16
Chapter 4 MAINTENANCE
4.4 REPLACEMENT OF MAJOR PARTS
4.4 REPLACEMENT OF MAJOR PARTS
The system includes parts that need periodic replacement. The parts should be replaced
as scheduled. Use of parts over their service life can cause a system failure.
WARNING
Direct exposure to electromagnetic waves at close range will have
adverse effects on the human body. When it is necessary to get
close to the antenna for maintenance or inspection purposes,
make sure to turn the indicator power switch to "OFF" or "STBY."
Direct exposure to electromagnetic waves at close range will have
adverse effects on the human body.
When conducting maintenance work, make sure to turn off the
power and unplug the power connector J1 of the display unit so
that the power supply to the equipment is completely cut off.
Some equipment components can carry electrical current even
after the power switch is turned off, and conducting maintenance
work without unplugging the power connector may result in
electrocution, equipment failure, or accidents.
CAUTION
INSTRUCTION MANUAL
Make sure to shut off the main power before replacing parts.
Failure to comply may result in electrocution or equipment failure.
When replacing magnetrons, make sure to shut off the main power
and let the equipment stand for more than 5 minutes to discharge
the high-voltage circuit.
Failure to comply may result in electrocution.
Make sure to take off your watch when your hand must get close
to the magnetron.
Failure to comply may result in damage to the watch since the
magnetron is a strong magnet.
Do not directly touch the inverter circuit of the LCD display with a
bare hand since high voltage temporarily remains in the circuit
even after the main power is shut off.
Failure to comply may result in electrocution.
4-17
Chapter 4 MAINTENANCE
4.4 REPLACEMENT OF MAJOR PARTS
 Parts Required for Periodic Replacement
Here are parts required for periodic replacement.
Part name
4-18
Interval
1. Magnetron
4,000 hours
2. Motor
10,000 hours
3. LCD backlight
50,000 hours
4. Fan motor
20,000 hours
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
4.5 FAULT FINDING
In case of semiconductor circuits, it is deemed that there are few cases in which the used
semiconductor devices have inferior quality or performance deterioration except due to
insufficient design or inspection or by other external and artificial causes. In general, the
relatively many causes are disconnection in a high-value resistor due to moisture, a
defective variable resistor and poor contact of a switch or relay.
Some troubles are caused by defective parts, imperfect adjustment (such as tuning
adjustment) or insufficient service (such as poor cable contact). It will also be effective
to check and readjust these points.
4.5.1
LIST OF ALARMS AND OTHER INDICATIONS
If any of the following alarm occurs, the system displays the alarm message in red in
order to attract the attention of operator. Other messages are displayed with the suitable
color which is yellow or blue depending on the level of message importance.
Red ŕŁCollision-related Alarm
Alarm:
ŕŁNavigation Alarm
ŕŁSystem Alarm
Yellow ŕŁSystem Warning
Blue ŕŁOperation Information
Status:
The following table shows alarms and other indications the system displays.
Table 4.5-1 Alarm list
Alarm name
Alarm name
(Japanese)
(English)
ăáŕ˘ŕŁŕŁŽ
Alarm Error
Class
Description
Alarm Cannot send the alarm because of insufficient message buffer for
alarm task.
Table 4.5-2 Alarm list of system alarm: scanner
Alarm name
Alarm name
(Japanese)
(English)
Class
Description
âľŕ°âĽş áłŕś˛ SW ŕ˘ŕŁ
Scanner(SSW Off)
Alarm The safety switch OFF bit of scanner communication data is set.
âľŕ°âĽş AZI
Scanner(AZI)
Alarm The BP error bit of scanner communication data is set.
âľŕ°âĽş HL
Scanner(HL)
Alarm The BZ error bit of scanner communication data is set.
âľŕ°âĽş áăŞă§á
˝
Scanner(MHV)
Alarm The high-voltage modulator error bit of scanner communication
data is set.
âľŕ°âĽş âăťŕ˛
Scanner(Time Out)
Alarm No reply from the scanner after data transmission.
4-19
INSTRUCTION MANUAL
Caution:
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
Alarm name
Alarm name
(Japanese)
(English)
âľŕ°âĽş ࢚࣎ࢹ
Scanner(Data)
Class
Description
Alarm Collision occurs when transmitting data to the scanner.
Checksum of the received data is different.
âľŕ°âĽş EEPROM
Scanner(EEPROM)
Alarm Stored value error is returned from the scanner when the initial
adjustment data is requested.
The save operation is not completed when data save is requested to
scanner EEPROM.
âľŕ°âĽş ŕŁŕŁŽŕ˘ąăá
˝
Scanner(Heater)
Alarm The MAG heater voltage error bit of scanner communication data
is set.
âľŕ°âĽş ăŤá
ăż
Scanner(Reverse)
Alarm The reverse rotation alarm bit of scanner communication data is set.
âľŕ°âĽş ŕŁ
࢚ŕ˘
Scanner(Video)
Alarm The VIDEO error bit of scanner communication data is set.
âľŕ°âĽş ࢺŕŁŕ˘ŕŁŽ
Scanner(Trigger)
Alarm The TRIGGER error bit of scanner communication data is set.
âľŕ°âĽş ŕŁŕ˘ŕŁĽ 1
Scanner(Fan 1)
Alarm The FAN error bit (FAN 1) of scanner communication data is set.
âľŕ°âĽş ŕŁŕ˘ŕŁĽ 2
Scanner(Fan 2)
Alarm The FAN error bit (FAN 2) of scanner communication data is set.
âľŕ°âĽş ŕŁŕŁŽŕ˘ąă὜
Scanner(Motor)
Alarm The motor current error of scanner communication data is set.
Table 4.5-3 Alarm list of system alarm: display unit
Alarm name
Alarm name
(Japanese)
(English)
Class
Description
᧯సă 1 âăťŕ˛
Keyboard1(Time Out)
Alarm No reply from the control panel after data transmission.
᧯సă 2 âăťŕ˛
Keyboard2(Time Out)
Alarm No reply from the control panel after data transmission.
DSP ŕŁ
࢚ŕ˘
DSP(Video)
Alarm DSP detects VIDEO error.
DSP ࢺŕŁŕ˘ŕŁŽ
DSP(Trigger)
Alarm DSP cannot receive TI interrupt.
DSP AZI
DSP(AZI)
Alarm DSP cannot receive BP interrupt.
DSP HL
DSP(HL)
Alarm DSP cannot receive BZ interrupt.
DSP ŕ¸âŽâá
DSP Error
Alarm Abnormal operation (infinite loop) of DSP.
Table 4.5-4 Alarm list of system alarm: external equipment communication
Alarm name
Alarm name
(Japanese)
(English)
Class
Description
GPS ŕŁŕŁŽŕ˘ş
GPS Port
Alarm Serial driver error occurs during COM1 port communication.
Gyro/Compass ŕŁŕŁŽŕ˘ş
Gyro/Compass Port
Alarm Serial driver error occurs during COM2 port communication.
NMEA1 ŕŁŕŁŽŕ˘ş
NMEA1 Port
Alarm Serial driver error occurs during COM3 port communication.
NMEA2 ŕŁŕŁŽŕ˘ş
NMEA2 Port
Alarm Serial driver error occurs during COM4 port communication.
Keyboard ŕŁŕŁŽŕ˘ş
Keyboard Port
Alarm Serial driver error occurs during COM5 port communication.
Scanner ŕŁŕŁŽŕ˘ş
Scanner Port
Alarm Serial driver error occurs during COM6 port communication.
ࢪŕŁŕ˘ŕŁ âăťŕ˛
GYRO(Time Out)
Alarm For heading equipment=Gyro, cannot receive valid sentences
(including checksum error) which had been received properly.
4-20
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
Alarm name
Alarm name
(Japanese)
(English)
ŕŁŕ˘˘ âăťŕ˛
Log(Time Out)
Class
Description
Alarm For speed equipment=log, cannot receive valid sentences
(including checksum error) which had been received properly.
ࢪŕŁŕ˘ŕŁ ăťŕ˛ŕ˘šŕŁŽŕ˘ą
GYRO(Data)
Alarm For heading equipment=Gyro, the GYRO error bit of NSK
communication data is set.
ŕŁŕ˘˘ ăťŕ˛ŕ˘šŕŁŽŕ˘ą
Log(Data)
Alarm For speed equipment=log, the LOG error bit of NSK
communication data is set.
ăŞă° âăťŕ˛
Heading(Time Out)
Alarm For heading equipment=compass, cannot receive valid NMEA
bearing sentences (including checksum error) which had been
received properly.
ăŞă° ăťŕ˛ŕ˘šŕŁŽŕ˘ą
Heading(Data)
Alarm For heading equipment=compass, cannot receive valid NMEA
bearing data which had been received properly.
2 ăáá
âăťŕ˛
2AXG(Time Out)
Alarm For speed equipment=2-axis log, cannot receive valid VBW
sentences (including checksum error) which had been received
properly.
2 ăáá
ăťŕ˛ŕ˘šŕŁŽŕ˘ą
2AXG(Data)
Alarm For speed equipment=2-axis log, cannot receive valid VBW
ground data which had been received properly.
GPS ŕ˘ŕŁŕŁŽ
GPS(Error)
Status Failed to set GPS.
GPS âăťŕ˛
GPS(Time Out)
Alarm Cannot receive valid GPS sentences (including checksum error)
GPS ఊ⨨࢚࣎ࢹ
GPS(Position)
Alarm Cannot receive valid position data which had been received
properly
GPS
á
âŁŕ˘šŕŁŽŕ˘ą
GPS(Datum)
Alarm Cannot receive valid geodetic data which had been received
properly
GPS ăżá࢚࣎ࢹ
GPS(Speed)
Alarm For speed equipment=GPS, cannot receive valid speed data which
had been received properly
GPS
ŕ°Šâ§á
áťáż âăťŕ˛
GPS(Status)
Alarm Received GPS fixing status error (invalid) data
Depth(Time Out)
Alarm Cannot receive valid depth sentences (including checksum error)
which had been received properly
áťáż ăťŕ˛ŕ˘šŕŁŽŕ˘ą
Depth(Data)
Alarm Cannot receive valid depth data which had been received properly
áť
TEMP(Time Out)
Alarm Cannot receive valid water temperature sentences which had been
âăťŕ˛
received properly
áť
ăťŕ˛ŕ˘šŕŁŽŕ˘ą
TEMP(Data)
Alarm Cannot receive valid water temperature data which had been
received properly
㢼ྥ㢼㿠âăťŕ˛
Wind(Time Out)
Alarm Cannot receive valid wind direction/wind velocity sentences
(including checksum error) which had been received properly
㢼ྥ㢼ăżă¸Śâżă¸§ ăťŕ˛ăşĄăşźăşăş Wind True(Data)
Alarm Cannot receive valid water temperature data after valid wind
direction/wind velocity (true) data had been received properly
4-21
INSTRUCTION MANUAL
which had been received properly.
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
Alarm name
Alarm name
(Japanese)
(English)
㢼ྥ㢼ăżă¸ŚâŚă¸§ ăťŕ˛ăşĄăşźăşăş Wind Relative(Data)
Class
Description
Alarm Cannot receive valid water temperature data after valid wind
direction/wind velocity (relative) data had been received properly
á
ă˘âĄ âăťŕ˛
Turn(Time Out)
Alarm Cannot receive valid turning ratio sentences (including checksum
error) which had been received properly
á
ă˘âĄ ăťŕ˛ŕ˘šŕŁŽŕ˘ą
Turn(Data)
Alarm Cannot receive valid turning ratio data which had been received
properly
⯌ă
âăťŕ˛
Rudder(Time Out)
Alarm Cannot receive valid steering direction sentences (including
checksum error) which had been received properly
⯌ă
ăťŕ˛ŕ˘šŕŁŽŕ˘ą
Rudder(Data)
Alarm Cannot receive valid steering direction data which had been
received properly
AIS âăťŕ˛
AIS(Time Out)
Alarm For AIS function=On, cannot receive valid AIS data (including
checksum error) which had been received properly
AIS ăťŕ˛ŕ˘šŕŁŽŕ˘ą
AIS(Data)
Alarm For AIS function=On, cannot receive valid AIS data which had
been received properly
AIS ăşăşľăşăşŻ 001
AIS(Alarm 001)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 002
AIS(Alarm 002)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 003
AIS(Alarm 003)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 004
AIS(Alarm 004)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 005
AIS(Alarm 005)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 006
AIS(Alarm 006)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 008
AIS(Alarm 008)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 025
AIS(Alarm 025)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 026
AIS(Alarm 026)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 029
AIS(Alarm 029)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 030
AIS(Alarm 030)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
4-22
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
Alarm name
Alarm name
(Japanese)
(English)
AIS ăşăşľăşăşŻ 032
AIS(Alarm 032)
Class
Description
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
AIS ăşăşľăşăşŻ 035
AIS(Alarm 035)
Alarm For AIS function=On, an error from the AIS receiver is received
(ALR)
Table 4.5-5 Notification list
Alarm name
Alarm name
(Japanese)
(English)
Class
Description
ࢪŕŁŕ˘ŕŁăżá
Set Gyro
Status Requires setting of true bearing.
ॲड़ŕĄŕĄ TM ŕŁŕ˘ŕ˘ľŕ˘ş
TM Reset
Status For TM, the own ship position is out of 60% of the radius of PPI.
᜾ࡠáŕ᪟
High Temperature
Caution Adjusting the LCD brilliance due to internal temperature control.
GPS(HDOP)
Caution Received excessive HDOP value beyond the setting.
GPS
ŕ°Šâ˘áŕ°Şŕ
Table 4.5-6 Radar alarm list
Alarm name
(Japanese)
(English)
Class
Description
㺸ăşăşăşźăşăşăşľăşăşŻ 1 ăŕś°
Area1(Approach)
Alarm Echo in area 1.
㺸ăşăşăşźăşăşăşľăşăşŻ 2 ăŕś°
Area2(Approach)
Alarm Echo in area 2.
㺸ăşăşăşźăşăşăşľăşăşŻ 1 ăłâŹş
Area1(Secession)
Alarm No echo in area 1
㺸ăşăşăşźăşăşăşľăşăşŻ 2 ăłâŹş
Area2(Secession)
Alarm No echo in area 2
㺸ăşăşăşźăşăşăşľăşăşŻ 1 㥿áŚáĽ
Area1(Out of Range)
Alarm y Rectangle area 1 is out of range
INSTRUCTION MANUAL
Alarm name
y Creation of area 1 is out of range
㺸ăşăşăşźăşăşăşľăşăşŻ 2 㥿áŚáĽ
Area2(Out of Range)
Alarm y Rectangle area 1 is out of range
y Creation of area 2 is out of range
TT ŕź´ă¤â áś
TT(CPA/TCPA)
Alarm TT is changed to a dangerous ship
TT áŞă¤â áś
TT(New Target)
Alarm TT is automatically acquired
TT â áśŕŁŕ˘Ťŕ˘ş
TT(Lost)
Alarm TT is lost
TT 㥿áŚáĽ
TT(Out of Range)
Alarm TT is too far to be tracked
TT áąáąá¤á¤áŠ
TT(Max Target)
Status Manually acquired when the number of acquisition reached
maximum
TT áąáąá¤á¤áŠ
TT(Max Target)
Status Detected when DSP tries to acquire 11 targets or more
DSP notifies the maximum target alarm occurrence of automatic
acquisition to the TT process task, then the TT process task notifies
it to the alarm task
EBL1/VRM1 㥿áŚáĽ
EBL/VRM1(Out)
Status The floating position of EBL1/VRM1 in the latitude/longitude
floating setting is out of the radius of PPI
EBL2/VRM2 㥿áŚáĽ
EBL/VRM2(Out)
Status The floating position of EBL2/VRM2 in the latitude/longitude
floating setting is out of the radius of PPI
4-23
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
Alarm name
Alarm name
(Japanese)
(English)
ášâžâĽşŕ˘ŕŁŽŕ˘ŻŕŁăĄżáŚáĽ
P-CURS(Out)
Class
Description
Status The floating position of the parallel cursor in the latitude/longitude
floating setting is out of the radius of PPI
Table 4.5-7 Error message list and alarm list for operations
Alarm name
Alarm name
(Japanese)
(English)
áŞŕ°Šŕ˘šŕŁŽŕ˘ąâŕĄ
No Heading Data
Class
Description
Status Cannot function because own ship heading is not available
y Operations for specifying TT acquisition/numerical display
y Changing to TM
y Changing to N Up/C Up
ŕŁŕŁŕŁŕŁŽŕ˘şŕ°ŕĄŕĄ
On Preheating
Status Transmission operation during preheating
᧯సăŤă¸ŕĄâˇŕ ¸ŕĄŕĄ
Short Interval
Status Transmission operation in the interval of 1 second or less between
standby and transmission
ŕ˘ŕŁŕŁŽââŕ°ŕĄŕĄ
Error Occurring
Status Transmission operation during prohibition of transmission caused
by scanner error
áąáąâ
ŹáŠŕĄŕĄ
Max Point
Status Exceeded the maximum number of marks
ŕŁŕ˘ŕ˘ŕŁâŕĄ
File Not Found
Status File does not exists
áĽăŕŁŕŁŕŁâŕĄ
USB Memory Not Set
Status USB memory does not exists
ŕŁŕ˘ŕ˘ŕŁăă¸ŕĄłáťáŠ
File Read Error
Caution Failed to load the file
ŕŁŕ˘ŕ˘ŕŁáŠŕ¸ŕĄáťáŠ
File Write Error
Caution Failed to write the file
âľáăŕă
Not Enough Space
Status Insufficient capacity
ŕŁŕ˘ŕŁŽŕŁŕ˘ľŕ˘şáťáŠ
Format Error
Caution Failed to format
ŕŁŕ˘ŕ˘ŕŁáŠŕ˘ŕŁŽŕŁŕŁŽ
Num of files Over
Caution Writing data to the USB memory in which the number of the file
has reached to the maximum
ŕŁŕ˘ŕ˘ŕŁŕšăáťáŠ
File Erase Error
Caution Failed to delete the file
ă኿â¤áŻ NG
Self Test NG
Caution Diagnosis NG
⎏⯪ă§âŚáŕ˘ŕŁŽŕŁŕŁŽ
LAT(Out of Bounds)
Caution The own ship's latitude is 80 degrees or more (indicating that some
functions are limited)
y Displays AIS, waypoint, mark/line, own ship trail, etc. for 80
degrees or more
y Input operations for 80 degrees or more (refer to "High
Latitude" alarm)
4-24
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
Alarm name
Alarm name
(Japanese)
(English)
ăżáŕĄŕ˘ŕĄŕ ¸ŕĄ˛ŕĄŕ˘
Unsetting
Class
Description
Status y Menu display operations when all soft key menu/multi control
menu items are turned off
y Area creation operations for alarm class=Off
y EBL bearing setting while EBL is off
y Floating setting while EBL/VRM is off
y VRM range setting while VRM is off
y Bearing/width setting while parallel cursor is off
y Manual tuning setting while automatic tuning is on
y AIS operations while AIS function is off
y TT operations while TT function is off
y Operations to display the weather information while no
observation point is selected
áąáąŕŁŕŁĽŕ˘ŞŕĄŕĄ
MAX Range Scale
Status Range up operations at the maximum range
áąá ŕŁŕŁĽŕ˘ŞŕĄŕĄ
MIN Range Scale
Status Range down operations at the minimum range
âŕş ŕłŕĄŕĄ
Invalid Data
Status Cannot function due to invalid value
y Invalid code is input for the code input screen
In Operation
Status This operation is disabled due to another operation
y Setting enable/disable and class during alarm area creation
y Setting operations for on/off and floating position during EBL
bearing setting
y Setting operations for on/off and bearing during EBL floating
position setting
y Operations for on/off during VRM range setting
y Operations for on/off, mode and saving during off center
custom position setting
y Operations for PRF tuning during manual tuning operations
y Setting for automatic/manual mode during manual tuning
operations
y Operations for manual tuning during PRF tuning operation
4-25
INSTRUCTION MANUAL
᧯సŕ°ŕĄŕĄ
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
Alarm name
Alarm name
(Japanese)
(English)
áŞŕ°Š/âŚáâ¤á âŕĄ
No HDG/POSN Data
Class
Description
Status Cursor operations when own heading or latitude/longitude is
disabled
y MOB input
y Event mark input
y Inputting/erasing/moving marks
y Inputting/erasing/moving/inserting lines
y Floating position setting for EBL latitude/longitude.
y Floating position setting for VRM latitude/longitude.
y Floating position setting for parallel cursor latitude/longitude
y AIS numerical display/destination ship/retrieved vessel
selection
y Creating latitude/longitude alarm area.
y TLL transmission for cursor.
ŕĄŕĄŕĄ˛ŕĄŕ˘
Not Allowed
Status y Operations for inserting by selecting the end point in the line
list.
y Operations for switching to H-UP during TM
(When heading is not available, temporarily changed to
RM-HUp, therefore, message is disabled.)
ăżáŕŕžŕĄŕŁŕŁĽŕ˘ŞŕĄŕĄ
Range Scale Limit
Status Operations functionally restricted for certain range.
y Zoom operations in range where zoom is not available.
y Off center operations in range where off center is not available.
y TM setting operations in range where TM setting is not
available.
࢚࣎ࢹŕĄŕ śŕĄžŕĄ˛ŕĄŕ˘
No Valid Data
Status Operations without data.
y Displaying history menu without history data.
y Operations for editing/erasing in the mark list while there is no
mark.
y Operations for editing/erasing/inserting in the line list while
there is no line.
4-26
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
Alarm name
Alarm name
(Japanese)
(English)
ࢍࢹࣼŕŁŕ˘ŕ°ŕĄŕĄ
Scanner Standby
Class
Description
Status The functions which are available only during transmitting are
operated during standby (or preheating).
y Setting Timed TX to on.
Cursor operations during standby (no graphic display is available).
y Custom position setting for off center.
y Inputting/erasing/moving marks
y Inputting/erasing/moving/inserting lines
y Floating position setting for EBL.
y Floating position setting for VRM.
y Floating position setting for parallel cursor.
y TT acquisition/release/numerical display selection.
y AIS numerical display/destination ship/retrieved vessel
selection
y Alarm area creation
ă§âŚáŕ˘ŕŁŽŕŁŕŁŽ
High Latitude
Status Operations for the position of latitude 80 degrees or more.
y MOB input
y Event mark input
y Inputting/moving/inserting lines
y Floating position setting for EBL latitude/longitude.
y Floating position setting for VRM latitude/longitude.
y Floating position setting for parallel cursor latitude/longitude.
y Creating latitude/longitude alarm area.
âŕş ŕĄŕŁŕŁŽŕ˘ŞŕŁŕŁĽŕĄŕĄ
Invalid Version
Status Program is loading a file with an incompatible version.
y Internal Setting
y Marks/lines
y Own track
y Option languages
y STC curve
y Color
Flash ROM âá
Flash ROM Error
Alarm Initialization error of flash ROM file system during startup.
USB âá
USB Error
Alarm Initialization error of USB during startup.
4-27
INSTRUCTION MANUAL
y Inputting/moving marks
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
4.5.2
FUSE CHECKING
Melted fuses are caused by any clear cause. When a fuse is replaced, it is necessary to
check the related circuits even if there is no trouble. In checking, note that there is some
dispersion in the fusing characteristics. Table 4.5-8 shows a list of fuses used in the
equipment.
Table 4.5-8 Fuse List
Location
Parts No.
Current
Rating
Type
Protection
Circuit
Application
Display Unit
F1
10A
MF60NR 250V 10 I/F circuit
Display Unit
NCD-2182
Display Unit
F2
6.3A
ST4-6.3AN1
I/F circuit
Scanner
NKE-2042(4kW)
NKE-2043(4kW)
NKE-2062(6kW)
NKE-2063(6kW)
(For DC12V)
for the compound modulator
Display Unit
F2
3.15A
ST4-3.15AN1
I/F circuit
Scanner
NKE-2042(4kW)
NKE-2043(4kW)
NKE-2062/HS(6kW)
NKE-2063/HS(6kW)
(For DC24V)
for the compound modulator
Display Unit
F2
5A
ST4-5AN1
I/F circuit
Scanner
NKE-2103-4/4HS/6/6HS
(10kW)
for the modulator
Display Unit
F3
5A
ST4-5AN1
I/F circuit
Scanner
NKE-2103-4/4HS/6/6HS (6kW)
for the motor
Display Unit
F3
10A
ST6-10AN1
I/F circuit
Scanner
NKE-2103-4/4HS/6/6HS
(10kW)
for the power supply to motor
4-28
Chapter 4 MAINTENANCE
4.5 FAULT FINDING
 Fuse Locations
Fuse locations are shown below.
F3
F1
F2
INSTRUCTION MANUAL
4-29
Chapter 4 MAINTENANCE
4.6 TROUBLE SHOOTING
4.6 TROUBLE SHOOTING
As this radar equipment includes complicated circuits, it is necessary to request a
specialist engineer for repair or instructions for remedy if any circuit is defective.
There are also troubles by the following causes, which should be referred to in checking
or repair work.
z Poor Contact in Terminal Board of Inter-Unit Cables
y Poor contact in terminal board
y The cable end is not fully connected, that it, contacted with earthed another
terminal.
y Disconnected cable wire
z Poor Contact of Connector within Unit
Reference:
This radar equipment is provided with standard included accessories shown in Table 4.6-1.
4.6.1
INCLUDED ACCESSORIES
Table 4.6-1 Included accessories
7ZXRD0012 : Scanner NKE-2042 (4kW)
Name/Type
Parts No.
Fuse
ST4-6.3AN1
F2
Fuse
ST4-3.15AN1
F2
Code
Shape (mm)
5ZFCA00051
Quantity
Application
6.35
(DC12V)
Inside
For the
processing unit
modulator
6.35
(DC24V)
Inside
For the
processing unit
modulator
31.8
5ZFCA00047
Location
31.8
7ZXRD0012 : Scanner NKE-2043 (4kW)
Name/Type
Fuse
ST4-6.3AN1
Fuse
ST4-3.15AN1
4-30
Parts No.
F2
Code
Shape (mm)
6.35
5ZFCA00051
Quantity
F2
5ZFCA00047
31.8
Application
(DC12V)
Inside
For the
processing unit compound
modulator
(DC24V)
Inside
For the
processing unit compound
modulator
31.8
6.35
Location
Chapter 4 MAINTENANCE
4.6 TROUBLE SHOOTING
7ZXRD0013 : Scanner NKE-2062/HS (6kW)
Name/Type
Fuse
ST4-6.3AN1
Parts No.
F2
Code
Shape (mm)
6.35
5ZFCA00051
Quantity
F2
Fuse
ST4-5AN1
F3
6.35
5ZFCA00047
NKE-2062/HS
Inside
(DC24V)
processing unit For the
modulator
NKE-2062/HS
Inside
For the scanner
processing unit
motor
Scanner
31.8
6.35
5ZFCA00050
31.8
Carbon brush
54531-01
â
8.0
BRXP05247
Application
NKE-2062
Inside
(DC12V)
processing unit For the
modulator
31.8
Fuse
ST4-3.15AN1
Location
32.0
For the scanner
motor
7ZXRD0013 : Scanner NKE-2063/HS (6kW)
Fuse
ST4-6.3AN1
Parts No.
F2
Fuse
ST4-3.15AN1
F2
Fuse
ST4-5AN1
F3
Code
5ZFCA00051
Shape (mm)
6.35
31.8
6.35
5ZFCA00047
Quantity
6.35
â
8.0
BRXP05247
NKE-2063
(DC12V)
Inside
For the
processing unit
compound
modulator
NKE-2063/HS
Inside
For the scanner
processing unit
motor
Scanner
31.8
Carbon brush
54531-01
Application
NKE-2063/HS
(DC24V)
Inside
For the
processing unit
compound
modulator
31.8
5ZFCA00050
Location
32.0
For the scanner
motor
7ZXRD0026 : Scanner NKE-2103-4/4HS/6/6HS (10kW)
Name/Type
Parts No.
Fuse
ST4-5AN1
F2
Fuse
ST6-10AN1
F3
Code
Shape (mm)
5ZFCA00050
Quantity
31.8
Application
6.35
Inside
For the
processing unit modulator
6.35
Inside
For the power
processing unit supply to motor
31.8
5ZFCA00053
Location
4-31
INSTRUCTION MANUAL
Name/Type
Chapter 4 MAINTENANCE
4.6 TROUBLE SHOOTING
7ZXRD0028 : Display unit NDC-2182
Code
Connector
P3
LTWBD-06BFFALL7001
5JCDX00032
Connector
P5
LTWBD-08BFFALL7001
5JCDX00034
Shape (mm)
Spare Location
44.0
18.0
Parts No.
Application
Inside
processing
unit
Mainly for GPS
connection
Inside
processing
unit
Mainly for connecting
course equipment such
as a GPS compass
44.0
18.0
Name/Type
For AIS connection
4-32
44.0
5JCD00033
18.0
Connector
P6
LTWBD-07BFFALL7001
Inside
processing
unit
For connecting other
external devices when
the AIS is not used
For acquiring 2-axis
logs, current data, and
wind direction data
Chapter 4 MAINTENANCE
4.6 TROUBLE SHOOTING
4.6.2
SPECIAL PARTS
Table 4.6-2 Special Parts
JMA-3314
Parts No.
Name
Type
Code
Manufacturer
Location
V201
Magnetron
MSF1421B
5VMAA00049
NJRC
Scanner
A101
Circulator
FCX68
6AJRD00001
Toshiba
Scanner
A102
Diode Limiter
NJS6930
5EZAA00024
NJRC
Scanner
JMA-3334
Parts No.
Name
Type
Code
Manufacturer
Location
V101
Magnetron
MSF1421B
5VMAA00092
NJRC
Scanner
A101
Circulator
FCX68R
5AJIX00027
Orient
Microwave
Scanner
A102
Diode Limiter
NJS6930
5ATBT00006
NJRC
Scanner
JMA-3316/HS
Name
Type
Code
Manufacturer
Location
V101
Magnetron
MSF1422B
5VMAA00068
NJRC
Scanner
A101
Circulator
FCX68
6AJRD00001
Toshiba
Scanner
A102
Diode Limiter
NJS6930
5EZAA00024
NJRC
Scanner
JMA-3336/HS
Parts No.
Name
Type
Code
Manufacturer
Location
V101
Magnetron
MSF1422B
5VMAA00090
NJRC
Scanner
A101
Circulator
FCX68R
5AJIX00027
Orient
Microwave
Scanner
A102
Diode Limiter
NJS6930
5ATBT00006
NJRC
Scanner
JMA-3340-4/4HS/6/6HS
Parts No.
Name
Type
Code
Manufacturer
Location
V101
Magnetron
MAF1565N
5VMAA00102
NJRC
Scanner
A101/A102
Circulator
FCX68R
5AJIX00027
Orient
Microwave
Scanner
A103
Dummy
NJC4002
5ANDF00001
NJRC
Scanner
A104
Filter
NJC9952
5AWAX00002
NJRC
Scanner
A301
Diode Limiter
NJS6930
5ATBT00006
NJRC
Scanner
4-33
INSTRUCTION MANUAL
Parts No.
Chapter 4 MAINTENANCE
4.6 TROUBLE SHOOTING
4.6.3
CIRCUIT BLOCK TO BE REPAIRED
Table 4.6-3 Circuit Block to be Repaired
JMA-3314
Location
Circuit Block
Type
Scanner
Motor unit
7BDRD0023*
Scanner
Modulation circuit
CME-322
Scanner
Receiver
CAE-475
Display Unit
Processing circuit
CDC-1346BR
Display Unit
I/F circuit
CMH-2235
Display Unit
I/F circuit
CQC-1262
Display Unit
Operation circuit
CCK-991
Display Unit
Operation circuit
CCK-1017
Display Unit
Fuse
MF60NR 250V 10
Remarks
F1
"*" means revision, such as A, B and so on.
JMA-3334
Location
Circuit Block
Type
Scanner
Motor
7BDRD0052*
Scanner
Compound Modulator
Circuit
CME-385
Scanner
Receiver Unit
NRG-239
Display Unit
Processing circuit
CDC-1346BR
Display Unit
I/F circuit
CMH-2235
Display Unit
I/F circuit
CQC-1262
Display Unit
Operation circuit
CCK-991
Display Unit
Operation circuit
CCK-1017
Display Unit
Fuse
MF60NR 250V 10
Remarks
Including CAE-548
F1
"*" means revision, such as A, B and so on.
4-34
Chapter 4 MAINTENANCE
4.6 TROUBLE SHOOTING
JMA-3316/HS
Location
Circuit Block
Type
Remarks
Scanner
Motor with gear
CBP-169
DC brushless motor
Scanner
Modulator
CME-339
Excluding Magnetron
Scanner
Receiver
NRG-226
Including CAE-475-1
Display Unit
Processing circuit
CDC-1346BR
Display Unit
I/F circuit
CMH-2235
Display Unit
I/F circuit
CQC-1262
Display Unit
Operation circuit
CCK-991
Display Unit
Operation circuit
CCK-1017
Display Unit
Fuse
MF60NR 250V 10
F1
JMA-3336/HS
Circuit Block
Type
Remarks
Scanner
Motor
CBP-218
DC brushless motor
Scanner
Compound Modulator
Circuit
CME-386
Excluding Magnetron
Scanner
Receiver Unit
NRG-239
Including CAE-548
Display Unit
Processing circuit
CDC-1346BR
Display Unit
I/F circuit
CMH-2235
Display Unit
I/F circuit
CQC-1262
Display Unit
Operation circuit
CCK-991
Display Unit
Operation circuit
CCK-1017
Display Unit
Fuse
MF60NR 250V 10
INSTRUCTION MANUAL
Location
F1
JMA-3340-4/4HS/6/6HS
Location
Circuit Block
Type
Remarks
Scanner
Motor with gear
7BDRD0048*
DC brushless motor
Scanner
Modulation circuit
CME-363
Excluding Magnetron
Scanner
Receiver
NRG-610
Including CAE-529-1
Scanner
Power supply circuit
CBD-1783
Scanner
Encoder
CHT-71A
Scanner
Motor control power circuit CBD-1779
Display Unit
Processing circuit
CDC-1346BR
Display Unit
I/F circuit
CMH-2235
Display Unit
I/F circuit
CQC-1262
Display Unit
Operation circuit
CCK-991
Display Unit
Operation circuit
CCK-1017
Display Unit
Fuse
MF60NR 250V 10
F1
"*" means revision, such as A, B and so on.
4-35
Chapter 4 MAINTENANCE
4.6 TROUBLE SHOOTING
4-36
Chapter 5 AFTER-SALES SERVICE
5.1 KEEPING PERIOD OF MAINTENANCE PARTS
Chapter 5
AFTER-SALES SERVICE
5.1 KEEPING PERIOD OF MAINTENANCE PARTS
Keeping period of maintenance parts is ten years from the production is discontinued.
5.2 WHEN YOU REQUEST FOR REPAIR
If you suppose the product may be out of order, read the description in "4.5 FAULT
FINDING" and "4.6 TROUBLE SHOOTING", and check the suspected point again.
If it is still out of order, you are recommended to stop operation of the equipment and
consult with the dealer from whom you purchased the product, or our branch office in
your country or district, the sales department in our main office in Tokyo.
Repair within the Warranty Period
If any failure occurs in the product during
its normal operation in accordance with the instruction manual, the dealer or JRC
will repair free of charge. In case that any failure is caused due to misuse, faulty
operation, negligence or force major such as natural disaster and fire, the product
will be repaired with charges.
Repair after the Warranty Period
If any defective function of the product is
INSTRUCTION MANUAL
recoverable by repair, the repair of it will be made at your own charge upon your
request.
Necessary Information for Repair
⍠۟âŹProduct name, model, manufacturing date and serial number
⍠۟âŹTrouble conditions (as detailed as possible. Refer to page 5-2 "â Radar Failure
Check List".)
⍠۟âŹName of company/organization, address and telephone number
5.3 RECOMMENDED MAINTENANCE
The performance of the product may deteriorate due to the secular change of the parts
used in it, though such deterioration depends upon the conditions of operation.
So checkup and maintenance is recommendable for the product in addition to your daily
care.
For maintenance, consult with the near-by dealer or our sales department.
Such maintenance will be made with charges.
For further details of after-sale service, contact the JRC Offices.
5-1
Chapter 5 AFTER-SALES SERVICE
5.3 RECOMMENDED MAINTENANCE
 Radar Failure Check List
5-2
Chapter 6 DISPOSAL
6.1 DISPOSAL OF THE UNIT
Chapter 6 DISPOSAL
6.1 DISPOSAL OF THE UNIT
When disposing of this unit, be sure to follow the local laws and regulations for the place
of disposal.
INSTRUCTION MANUAL
6-1
Chapter 6 DISPOSAL
6.2 DISPOSAL OF USED MAGNETRON
6.2 DISPOSAL OF USED MAGNETRON
Magnetron is used in the Scanner (NKE-2103).
z When the magnetron is replaced with a new one, return the used magnetron to our
dealer or business office.
For detail, consult with our dealer or business office.
6.3 CHINA RoHS
6-2
Chapter 7 SPECIFICATIONS
7.1 GENERAL SPECIFICATIONS
Chapter 7 SPECIFICATIONS
7.1 GENERAL SPECIFICATIONS
(1) Class of Emission
P0N
(2) Display
Color Raster Scan
(3) Display capability
VGA
(4) Screen
10.4-inch Color LCD
Effective diameter of radar echo, more than 150 mm
(5) Range Scale
0.125, 0.25, 0.5, 0.75, 1.5, 3, 6, 12, 24, 48, 72 NM
User can add 0.0625, 1, 2, 4, 8, 16, 32 or 64 NM.
* Off Center is not available at 64, 72NM.
(6) Range Resolution
Less than 30m
(7) Minimum Detective Range Less than 40m
(8) Range Accuracy
Less than 1% of the maximum distance of the range scale
in use or less than 15m whichever is larger
(9) Bearing Accuracy
Less than 1°
(10) Bearing Indication
Head-up, North-up, Course-up
(11) Ambient Condition
Standards
IEC60945 Ed.4.0
Temperature
Scanner
Operation: -25 to +55°C / Storage: -25 to +70°C
Other Unit except Scanner
Operation: -15 to +55°C
Entire Unit
INSTRUCTION MANUAL
Relative Humidity
+40°C, 93%
Vibration
Entire Unit
2 to 13.2 Hz, amplitudeÂą1mm
13.2 to 100 Hz0.7 G
Velocity of the wind
51.5m/s (100kn)
Waterproof/dustproof
Scanner
IP26
Display Unit IP55 (front panel)
(12) Power Supply Input
DC+24V (All models, cable length of 30m or less)
DC+12V
(4 kW/6 kW models, cable length of 20m or less)
7-1
Chapter 7 SPECIFICATIONS
7.1 GENERAL SPECIFICATIONS
(13) Power Consumption
In calm wind:
Approx. 60W (NKE-2042)
Approx. 60W (NKE-2043)
Approx. 85W (NKE-2062)
Approx. 85W (NKE-2063)
Approx. 85W (NKE-2062HS)
Approx. 85W (NKE-2063HS)
Approx. 100W (NKE-2103-4)
Approx. 100W (NKE-2103-4HS)
Approx. 100W (NKE-2103-6)
Approx. 100W (NKE-2103-6HS)
Maximum (Velocity of the wind: 100 kn):
Approx. 60W (NKE-2042)
Approx. 60W (NKE-2043)
Approx. 230W (NKE-2062)
Approx. 180W (NKE-2063)
Approx. 230W (NKE-2062HS)
Approx. 230W (NKE-2063HS)
Approx. 360W (NKE-2103-4)
Approx. 360W (NKE-2103-4HS)
Approx. 360W (NKE-2103-6)
Approx. 360W (NKE-2103-6HS)
(14) Range of power supply voltage fluctuation
+10.8 to 41.6 VDC (Display Unit) (4kW/6kW)
+21.6 to 31.2 VDC (Display Unit)
(6kWHS/10kW/10kWHS)
(15) Pre-heating Time
Approx. Within 1min30sec
(16) Scanner
Refer to Scanner Specifications
(17) Display unit
Refer to Display Unit Specifications
(18) Inter-Unit Cables
Using common scanner connecting cable CFQ-6912-**
Maximum cable length: 30 m
7-2
Chapter 7 SPECIFICATIONS
7.2 SCANNER
7.2 SCANNER
NKE-2042
(1) Dimensions
Height 275mmÂDiameter of radome 620mm
(2) Mass
Approx. 10.5kg
(3) Polarization
Horizontal Polarization
(4) Directional Characteristic
Horizontal Beam Width (-3dB):
2°
Vertical Beam Width (-3dB):
25°
Sidelobe Level:
-21dB or less (less than ¹10° from the main lobe)
(5) Rotation
Approx. 27rpm (NKE-2042)
(6) Peak Power
4 kW
(7) Transmitting Frequency
9410 r30MHz
(8) Transmitting Tube
Magnetron [MSF1421B]
(9) Pulse width/Repetition Frequency (Bandwidth)
SP: 0.08Ps/2250 Hz
MP1: 0.25Ps/1700 Hz, MP2: 0.5Ps/1200 Hz
LP1: 1.0Ps/650 Hz
0.125NM
0.08Ps/2250Hz (SP)
0.25NM
0.08Ps/2250Hz (SP)
0.5NM
0.08Ps/2250Hz (SP)
0.25Ps/1700Hz (MP1)
0.75NM
0.08Ps/2250Hz (SP)
0.25Ps/1700Hz (MP1)
1.5NM
0.08Ps/2250Hz (SP)
0.25Ps/1700Hz (MP1)
3NM
0.25Ps/1700Hz (MP1)
0.5Ps/1200Hz (MP2)
6NM
0.5s/1200Hz (MP2)
1.0Ps/650Hz (LP1)
12NM
1.0s/650Hz (LP1)
24NM
1.0s/650Hz (LP1)
48NM
1.0s/650Hz (LP1)
(10) Duplexer
Circulator + Diode Limiter
(11) Front End Module
MIC
INSTRUCTION MANUAL
7.2.1
(12) Intermediate Frequency Amplifier
Intermediate Frequency:
60MHz
Band Width:
20MHz (0.08Ps)
6MHz (0.25Ps, 0.5Ps)
3MHz (1.0Ps)
Gain:
More than 90dB
Amplifying Characteristics:
Logarithmic Amplifier
(13) Overall Noise Figure
6dB (Average)
7-3
Chapter 7 SPECIFICATIONS
7.2 SCANNER
7.2.2
NKE-2043
(1) Dimensions
Height 275mmÂDiameter of radome 620mm
(2) Mass
Approx. 10kg
(3) Polarization
Horizontal Polarization
(4) Directional Characteristic
Horizontal Beam Width (-3dB):
4°
Vertical Beam Width (-3dB):
25°
Sidelobe Level:
(5) Rotation
-21dB or less (less than ¹10° from the main lobe)
Approx. 27rpm (NKE-2043)
(16/20/24/27/30/36/42/48rpm can be set)
(6) Peak Power
4 kW
(7) Transmitting Frequency
9410 r30MHz
(8) Transmitting Tube
Magnetron [MSF1421B]
(9) Pulse width/Repetition Frequency (Bandwidth)
SP1: 0.08s/4000Hz, SP2: 0.08s/2250Hz, SP3: 0.13s/1700Hz
MP1: 0.25s/1700Hz, MP2: 0.5s/1200Hz
LP1: 0.8s/750Hz, LP2: 1.0s/650Hz
0.125NM
0.08Ps/4000Hz (SP1)
0.25NM
0.08Ps/4000Hz (SP1)
0.5NM
0.08Ps/4000Hz (SP1)
0.25Ps/1700Hz (MP1)
0.75NM
0.08Ps/2250Hz (SP2)
0.25Ps/1700Hz (MP1)
1.5NM
0.08Ps/2250Hz (SP2)
0.25Ps/1700Hz (MP1)
0.5s/1200Hz (MP2)
3NM
0.13Ps/1700Hz (SP3)
0.25Ps/1700Hz (MP1)
0.5s/1200Hz (MP2)
6NM
0.5s/1200Hz (MP2)
0.8Ps/750Hz (LP1)
1.0s/650Hz (LP2)
12NM
0.5s/1200Hz (MP2)
0.8s/750Hz (LP1)
1.0s/650Hz (LP2)
24NM
1.0s/650Hz (LP2)
48NM
1.0s/650Hz (LP2)
72NM
1.0s/650Hz (LP2)
(10) Duplexer
Circulator + Diode Limiter
(11) Front End Module
MIC
(12) Intermediate Frequency Amplifier
Intermediate Frequency:
60MHz
Band Width:
20MHz (0.08s, 0.13s)
6MHz (0.25Ps)
3MHz (0.5s, 0.8s, 1.0s)
Gain:
More than 90dB
Amplifying Characteristics:
Logarithmic Amplifier
(13) Overall Noise Figure
7-4
6dB (Average)
Chapter 7 SPECIFICATIONS
7.2 SCANNER
NKE-2062/HS
(1) Dimensions
Height 432mmÂSwing Circle 1220mm
(2) Mass
Approx. 24kg
(3) Polarization
Horizontal Polarization
(4) Directional Characteristic
Horizontal Beam Width (-3dB):
2°
Vertical Beam Width (-3dB):
30°
Sidelobe Level:
-23dB or less (less than ¹10° from the main lobe)
-26dB or less (¹10° or more from the main lobe)
(5) Rotation
Approx. 27rpm (NKE-2062)
Approx. 48rpm (NKE-2062HS)
(6) Peak Power
6 kW
(7) Transmitting Frequency
9410 r30MHz
(8) Transmitting Tube
Magnetron [MSF1422B]
(9) Pulse width/Repetition Frequency (Bandwidth)
SP: 0.08Ps/2250 Hz
MP1: 0.25Ps/1700 Hz, MP2: 0.5Ps/1200 Hz
LP1: 1.0Ps/650 Hz
0.125NM
0.08Ps/2250Hz (SP)
0.25NM
0.08Ps/2250Hz (SP)
0.5NM
0.08Ps/2250Hz (SP)
0.25Ps/1700Hz (MP1)
0.75NM
0.08Ps/2250Hz (SP)
0.25Ps/1700Hz (MP1)
1.5NM
0.08Ps/2250Hz (SP)
0.25Ps/1700Hz (MP1)
3NM
0.25Ps/1700Hz (MP1) 0.5Ps/1200Hz (MP2)
6NM
0.5Ps/1200Hz (MP2) 1.0s/650Hz (LP1)
12NM
1.0Ps/650Hz (LP1)
24NM
1.0Ps/650Hz (LP1)
48NM
1.0Ps/650Hz (LP1)
72NM
1.0Ps/650Hz (LP1)
(10) Duplexer
Circulator + Diode Limiter
(11) Front End Module
MIC
INSTRUCTION MANUAL
7.2.3
(12) Intermediate Frequency Amplifier
Intermediate Frequency:
60MHz
Band Width:
20MHz (0.08Ps)
6MHz (0.25Ps, 0.5Ps)
3MHz (1.0Ps)
Gain:
More than 90dB
Amplifying Characteristics:
Logarithmic Amplifier
7-5
Chapter 7 SPECIFICATIONS
7.2 SCANNER
7-6
(13) Overall Noise Figure
6dB (Average)
(14) Tune
AUTO/MANUAL
Chapter 7 SPECIFICATIONS
7.2 SCANNER
NKE-2063/HS
(1) Dimensions
Height 419.5mmÂSwing Circle 1220mm
(2) Mass
Approx. 21kg
(3) Polarization
Horizontal Polarization
(4) Directional Characteristic
Horizontal Beam Width (-3dB):
2°
Vertical Beam Width (-3dB):
30°
Sidelobe Level:
-23dB or less (less than ¹10° from the main lobe)
-26dB or less (¹10° or more from the main lobe)
(5) Rotation
Approx. 27rpm (NKE-2063)
(16/17.4/19/20.6/22.2/23.8/25.4/27rpm can be set)
Approx. 48rpm
(27/36/48rpm can be set)
(6) Peak Power
6 kW
(7) Transmitting Frequency
9410 r30MHz
(8) Transmitting Tube
Magnetron [MSF1422B]
(9) Pulse width/Repetition Frequency (Bandwidth)
SP1: 0.08Ps/4000Hz, SP2: 0.08Ps/2250Hz, SP3: 0.13Ps/1700Hz
MP1: 0.25Ps/1700 Hz, MP2: 0.5Ps/1200 Hz
LP1: 0.8s/750Hz, LP2: 1.0s/650Hz
0.125NM
0.08Ps/4000Hz (SP1)
0.25NM
0.08Ps/4000Hz (SP1)
0.5NM
0.08Ps/4000Hz (SP1)
0.25Ps/1700Hz (MP1)
0.75NM
0.08Ps/2250Hz (SP2)
0.25Ps/1700Hz (MP1)
1.5NM
0.08Ps/2250Hz (SP2)
0.25Ps/1700Hz (MP1)
0.5s/1200Hz (MP2)
3NM
0.13Ps/1700Hz (SP3)
0.25Ps/1700Hz (MP1)
0.5s/1200Hz (MP2)
6NM
0.5Ps/1200Hz (MP2)
0.8s/750Hz (LP1)
1.0s/650Hz (LP2)
12NM
0.5Ps/1200Hz (MP2)
0.8s/750Hz (LP1)
1.0s/650Hz (LP2)
24NM
1.0Ps/650Hz (LP2)
48NM
1.0Ps/650Hz (LP2)
72NM
1.0Ps/650Hz (LP2)
(10) Duplexer
Circulator + Diode Limiter
(11) Front End Module
MIC
7-7
INSTRUCTION MANUAL
7.2.4
Chapter 7 SPECIFICATIONS
7.2 SCANNER
(12) Intermediate Frequency Amplifier
Intermediate Frequency:
60MHz
Band Width:
20MHz (0.08s, 0.13s)
6MHz (0.25Ps)
3MHz (0.5s, 0.8s, 1.0s)
7-8
Gain:
More than 90dB
Amplifying Characteristics:
Logarithmic Amplifier
(13) Overall Noise Figure
6dB (Average)
(14) Tune
AUTO/MANUAL
Chapter 7 SPECIFICATIONS
7.2 SCANNER
NKE-2103-4/6/4HS/6HS
(1) Dimensions
Height: approx. 458 mm
Swing Circle: approx. 1,285mm (4ft)
Height: approx. 458 mm
Swing Circle: approx. 1910 mm (6ft)
(2) Mass
Approx. 38 kg (4ft)
Approx. 40 kg (6ft)
(3) Polarization
Horizontal Polarization
(4) Directional Characteristic
Horizontal Beam Width (-3dB)
1.8° (4ft)
1.2° (6ft)
Vertical Beam Width (-3dB)
20° (4ft/6ft)
Sidelobe Level
â26 dB or less (less than Âą10° from the main lobe)
(4ft/6ft)
â30 dB or less (Âą10° or more from the main lobe)
(4ft/6ft)
(5) Rotation
27rpm (NKE-2103-4/6)
48rpm (NKE-2103-4HS/6HS)
(6) Transmitting Frequency
9410 Âą30 MHz
(7) Peak Power
10 kW r50%
(8) Transmitting Tube
Magnetron [MAF1565N]
(9) Transmitting Pulse Width/Repetition Frequency (Bandwidth)
SP: 0.08Ps/2250 Hz
MP1: 0.25Ps/1700 Hz, MP2: 0.5Ps/1200 Hz
LP1: 0.8Ps/750 Hz, LP2: 1.0Ps/650 Hz
0.125NM
0.08Ps/2250Hz (SP)
0.25NM
0.08Ps/2250Hz (SP)
0.5NM
0.08Ps/2250Hz (SP)
0.25Ps/1700Hz (MP1)
0.75NM
0.08Ps/2250Hz (SP)
0.25Ps/1700Hz (MP1)
1.5NM
0.08Ps/2250Hz (SP)
0.25Ps/1700Hz (MP1)
0.5s/1200Hz (MP2)
3NM
0.25Ps/1700Hz (MP1)
0.5Ps/1200Hz (MP2)
0.8s/750Hz (LP1)
6NM
0.5Ps/1200Hz (MP2)
0.8Ps/750Hz (LP1)
1.0s/650Hz (LP2)
12NM
0.5Ps/1200Hz (MP2)
0.8Ps/750Hz (LP1)
1.0s/650Hz (LP2)
24NM
1.0Ps/650Hz (LP2)
48NM
1.0Ps/650Hz (LP2)
72NM
1.0Ps/650Hz (LP2)
(10) Duplexer
Circulator + Diode Limiter
7-9
INSTRUCTION MANUAL
7.2.5
Chapter 7 SPECIFICATIONS
7.2 SCANNER
(11) Front End Module
MIC
(12) Intermediate Frequency Amplifier
Intermediate Frequency:
60MHz
Band Width:
20MHz (0.08Ps)
6MHz (0.25Ps, 0.5Ps)
3MHz (0.8Ps, 1.0Ps)
More than 90dB
Amplifying Characteristics:
Logarithmic Amplifier
(13) Overall Noise Figure
7.5dB (Average)
(14) Tune Method
AUTO/MANUAL
7-10
Gain:
Chapter 7 SPECIFICATIONS
7.3 DISPLAY UNIT
7.3 DISPLAY UNIT
INTEGRATED DISPLAY UNIT (NCD-2182)
(1) Structure
Desk Top Integrated Type (LCD Monitor Unit/Keyboard
Unit/Processor Unit Integrated Structure)
Vertical installation only desk top integrated type
(2) Dimensions
Desktop installation
Height 310mm Ă Width 328mm Ă Depth 130.5mm
Flush-mounting
Height 290mm Ă Width 297mm Ă Depth 120mm
(3) Mass
Approx. 5kg
(4) Tune Method
MANUAL/AUTO (Bar-graph indication)
(5) STC (SEA)
MANUAL/AUTO
(6) FTC (RAIN)
MANUAL/AUTO
(7) Radar Interference Rejection
Built-in (The effect can be adjusted by three stages.)
(8) Bearing Marker
360° in 5° digit
(9) Heading Line
Electronic
(10) Off Center
Within 66% of the radius of PPI
(Not available at the maximum range)
Transition of the radar trails is possible during Off Center
mode.
(11) True Motion Unit
Built-in (Not available at the maximum range)
(12) True Motion Reset Position
66% of radius of any range
(13) Radar trail indication
True motion mode:
Only true motion trails
Relative motion mode: Only relative motion trails
Trail time length: 15 sec to 15 min/Continuous
30 sec to 30 min/Continuous
1 min to 1 hr/Continuous
30 min to 12 hr/Continuous
Arbitrary trail time length can be displayed at any time.
Possible to display time series trail and continuous trail
by color classification.
Not possible to select true motion trails or relative motion
trails.
* When switching to true/relative trails, the radar trails
are cleared.
Transition of the trails is possible during Off Center
mode (Relative motion). (Scroll)
When the bearing mode is switched (RM (T), TM)
7-11
INSTRUCTION MANUAL
7.3.1
Chapter 7 SPECIFICATIONS
7.3 DISPLAY UNIT
When the motion is switched (between RM (T) and TM),
true motion trails is transition.
* When switching to true/relative trails, the radar trails
are cleared.
(14) Variety of Pulse width
SP/MP1/MP2/LP1
(NKE-2042)
SP/MP1/MP2/LP1
(NKE-2062)
SP/MP1/MP2/LP1/LP2
(NKE-2103)
(15) Target enhance
3 stages
(16) Plotting
Line/200 marks/3 colors for own shipâs tracks, line types
selectable
(17) Display color
Radar echo
16 stages, 5 colors
(Yellow, Green, Orange, Purple, Red, Colored)
Radar trails
16 stages
3 colors for time trails (Green, White, Light Blue)
3 colors for continuous trails
(Green, White, Light Blue)
Background within PPI
3 colors (Black, Blue, Navy Blue)
Characters
5 colors (White, Orange, Green, Black, Red)
Cursor
4 colors (Cyan, Orange, Green, White)
AIS/vector
3 colors (Cyan, Green, White)
EBL/VRM
4 colors (Light Blue, Orange, Green, White)
(18) Simulator
Built-in simulator
(19) Full screen
Full screen (displayed without PPI mask)
(20) Multiple languages
Japanese, English, French, German, Spanish, Italian,
Portuguese, Norwegian
(21) LL / TD conversion
Built-in
(22) Navigation information during STBY
Built-in
(23) Land mile display
Range, scale, VRM
(24) Barge display
Displays the own ship and a barge.
(25) AIS information display
(MMSI, ship name) List display, Retrieved Vessel,
WPT setting
7-12
Chapter 7 SPECIFICATIONS
7.3 DISPLAY UNIT
7.3.2
OPERATION PANEL
(1) Structure
Integrated on the display unit
(2) Controls
GAIN
SEA
RAIN
MULTI
Cursor keys
(3) Keys
STBY
Stops transmission (Turns off the equipment if
simultaneously pressed with "TX/PRF")
TX/PRF
Starts transmission (Turns off the equipment if
simultaneously pressed with "STBY")
Changes PRF during transmission. Clears SHM when
held down.
Increases the distance range.
RANGE-
Decreases the distance range.
FUNC
Switches the function.
BRILL
Adjusts LCD brightness
ENT
Enter key (Selects menu items, etc)
CLEAR
Cancels operations
MENU
Opens/closes the menu screen
Soft key 1
Soft key 1
Soft key 2
Soft key 2
Soft key 3
Soft key 3
Soft key 4
Soft key 4
AIS FUNCTION
(1) Screen
Number of targets
Up to 50 targets (stores up to 500 ship static data)
Target information
Displays MMSI, call sign, ship name, COG, SOG,
CPA, TCPA, direction, distance, latitude, longitude,
status, etc.
Filters
Distance only
Active targets
Not available
Dangerous ship targets
No CPA/TCPA decision
(2) Operation
Built-in
7-13
INSTRUCTION MANUAL
7.3.3
RANGE+
Chapter 7 SPECIFICATIONS
7.3 DISPLAY UNIT
7.3.4
TT FUNCTION
(1) Acquisition
MANUAL/AUTO
(by automatic acquisition/activation zone)
(2) Tracking
10 targets (Automatic tracking)
(3) Display
Tracking data
1 ship (AIS or TT)
Maximum tracking range
20 NM
This varies depending on the range.
Target information
Displays items selected from true bearing, distance,
true course, true speed, CPA, TCPA.
Display of Vectors
True/Relative
Dangerous ship targets
Decision by CPA/TCPA
(4) Operation
7-14
Built-in
Chapter 7 SPECIFICATIONS
7.4 INPUT/OUTPUT SIGNAL
7.4 INPUT/OUTPUT SIGNAL
7.4.1
INPUT ENABLE SIGNAL
(1) Navigation equipment
IEC61162-1/2
Longitude/Latitude: GGA>RMC>GNS>GLL
COG/SOG: RMC>VTG
Log speed: VBW>VHW, NSK data
Bearing: THS>HDT>HDG>HDM
Depth: DPT>DBT
Water temperature: MTW
Rate of Turn: ROT
Rudder: RSA
AIS: VDM, VDO, ALR
Direction of wind, velocity of wind: MWV>VWT, VWR
(2) Bearing signal
GYRO-SYNC:
360X, 180X, 90X, 36X
(Require optional NSK unit NCT-4106A)
GYRO-STEP:
360X, 180X, 90X, 36X
(Require optional NSK unit NCT-4106A)
JRC-NSK format (JLR-10/20/30)
IEC61162
4800bps/38400bps:
THS>HDT>HDG>HDM
(3) Speed signal
LOG-SYNC: 360X, 180X, 90X, 30X
(Require optional NSK unit NCT-4106A)
INSTRUCTION MANUAL
LOG-PULSE: 800, 400, 200, 100
(Require optional NSK unit NCT-4106A)
IEC61162
7.4.2
4800bps: VBW, VHW
OUTPUT ENABLE SIGNAL
(1) Navigation information
IEC61162-1/2
Radar data:
RSD
Own ship's data:
OSD
TT data:
TTM, TLL, TTD
latitude/longitude data: GGA, RMC, GNS, GLL
(2) External buzzer
COG/SOG:
RMC, VTG
Bearing signal:
THS, HDT
Factory presetting: normal open contacts
7-15
Chapter 7 SPECIFICATIONS
7.5 STANDARD CONFIGURATION
7.5 STANDARD CONFIGURATION
Scanner:
1 unit
Display Unit:
1 unit
Standard included accessories: 1 set
7-16
Instruction manual:
1 book
Installation manual:
1 book
Quick instruction:
1 book
APPENDIX
APPENDIX
INSTRUCTION MANUAL
APPENDIX
Fig. A1 NKE-2042 SCANNER INTERCONNECTION DIAGRAM
APPENDIX-1
APPENDIX
Fig. A2 NKE-2043 SCANNER INTERCONNECTION DIAGRAM
APPENDIX-2
APPENDIX
INSTRUCTION MANUAL
APPENDIX
Fig. A3 NKE-2062 SCANNER INTERCONNECTION DIAGRAM
APPENDIX-3
APPENDIX
Fig. A4 NKE-2062HS SCANNER INTERCONNECTION DIAGRAM
APPENDIX-4
APPENDIX
APPENDIX-5
INSTRUCTION MANUAL
APPENDIX
Fig. A5 NKE-2063 SCANNER INTERCONNECTION DIAGRAM
APPENDIX
Fig. A6 NKE-2063HS SCANNER INTERCONNECTION DIAGRAM
APPENDIX-6
APPENDIX
INSTRUCTION MANUAL
APPENDIX
Fig. A7 NKE-2103-4/4HS/6/6HS SCANNER INTERCONNECTION DIAGRAM
APPENDIX-7
APPENDIX
Fig. A8 NCD-2182 DISPLAY UNIT INTERCONNECTION DIAGRAM
APPENDIX-8
APPENDIX
INSTRUCTION MANUAL
APPENDIX
Fig. A9 PRIMARY POWER SUPPLY DIAGRAM, TYPE JMA-3300
APPENDIX-9
APPENDIX
Fig. A10 JMA-3314 INTERCONNECTION DIAGRAM
APPENDIX-10
APPENDIX
INSTRUCTION MANUAL
APPENDIX
Fig. A11 JMA-3334 INTERCONNECTION DIAGRAM
APPENDIX-11
APPENDIX
Fig. A12 JMA-3316/HS INTERCONNECTION DIAGRAM
APPENDIX-12
APPENDIX
INSTRUCTION MANUAL
APPENDIX
Fig. A13 JMA-3336/HS INTERCONNECTION DIAGRAM
APPENDIX-13
APPENDIX
Fig. A14 JMA-3340-4/4HS/6/6HS INTERCONNECTION DIAGRAM
APPENDIX-14
APPENDIX
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