Kongsberg Simrad RA83P User manual

SERVICE MANUAL
Simrad RA83P/84P/85P
RA93P/94P/95P
RA83/84/85
RA93/94/95
0735
04
Marine Radar
Supplier:
Europe:
Simrad AB, Trading
Svalörtsgatan 14
S-42668 Västra Frölunda, Sweden
Telephon:[phone]
Telefax: [phone]
Americas:
Simrad Inc.
19210 33rd. Avenue West, SuiteA
Lynnwood WA98036, USA
Telephon:[phone]
Telefax: [phone]
ALWAYS AT THE FOREFRONT OF TECHNOLOGY

AMENDMENT HISTORY
RA80_90 Series SERVICE MANUAL
Doc No: 93842105
No. Document No & Rev No. Date
(D/M/Y)
Amendments
0 93842105-00 30/06/04 First issue
1
2
3
4
5
6
7
8
9
10
Amendment policy
When any change is applied in the document, only the document number of the relevant sheet(s) and
cover sheet are modified and the rest of the sheets are not changed. The document number is shown in
the footer area, right or left bottom of each sheet.

Safety Symbols
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.
DANGER
!
This indicates a hazardous procedure that could result in
serious injury or death if not performed properly.
WARNING
!
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.
CAUTION
!
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.
RA80_90 series
Marine Radar
Service Manual
93842105-00 i

Contents
Page
1. GENERAL........................................................................1-1
1.1 Purpose............................................................................................1-1
1.2 General Precautions.........................................................................1-1
1.3 Tools and Measurement Jigs............................................................1-1
1.4 System configuration for radar models.............................................1-2
1.4.1 non-IMO models......................................................................................................1-2
1.4.2 IMO models ( with Performance monitor and Gyro Interface ) ...............................1-2
1.4.3 PCBs in the Unit ......................................................................................................1-2
2. CIRCUIT DESCRIPTION
2.1 Scanner Unit ....................................................................... 2-1
2.1.1 Antenna............................................................................................2-3
2.1.2 HM(Heading Marker) pulse generator ..............................................2-3
2.1.3 Antenna drive motor .........................................................................2-3
2.1.4 Duplexer ...........................................................................................2-3
2.1.5 Transmitter .......................................................................................2-3
2.1.6 Receiver ...........................................................................................2-4
2.1.7 Performance Monitor........................................................................2-5
2.1.8 Data Communication........................................................................2-7
2.1.9 Check point and Signal.....................................................................2-7
2.2 Processor Unit (RP100A/RP100AP) ................................. 2-10
2.2.1 POWER PCB (E47-600A) ..............................................................2-10
2.2.2 LOGIC PCB (E47-700B).................................................................2-12
(1) Video Processing .................................................................................................2-12
(2) Video Display .......................................................................................................2-13
2.2.3 PANEL PCB (E40-901C) ...............................................................2-13
(1) Panel dimmer control................................................................................................2-13
(2) Sift Resistor...............................................................................................................2-13
(3) Operation keys..........................................................................................................2-13
(4) Others........................................................................................................................2-13
2.2.4 ATA PCB (E35-700C)....................................................................2-13
(1) Radar interface..........................................................................................................2-13
(2) CPU system ..............................................................................................................2-13
2.2.5 AIS PCB (E47-7200)......................................................................2-13
(1) Radar interface..........................................................................................................2-13
(2) AIS data interface......................................................................................................2-13
(3) CPU system ..............................................................................................................2-14
2.2.6 Gyro Interface PCB (E47-510A).....................................................2-14
2.2.7 System Interface on LOGIC PCB (E47-700B)................................2-14
(1) SCANNER interface..................................................................................................2-14
2.2.8 Interface..........................................................................................2-14
(1) Monitor operation .................................................................................................2-14
(2) Signal output for slave monitor.............................................................................2-15
(3) NMEA input/output...............................................................................................2-15
ii 93842105-00

Page
2.2.9 CONNECTOR and SIGNAL description.........................................2-17
2.2.9.1 Scanner Unit: Modulator PCB.........................................................................2-17
2.2.9.2 Processor Unit: LOGIC PCB...........................................................................2-18
2.2.9.3 Processor Unit: POWER PCB.........................................................................2-24
2.2.9.4 Processor Unit: ATA PCB...............................................................................2-25
2.2.9.5 Processor Unit: AIS PCB ................................................................................2-26
2.2.9.6 Processor Unit: GYRO INTERFACE PCB......................................................2-27
2.2.9.7 Operation Unit: PANEL PCB...........................................................................2-28
2.2.10 System Setting.................................................................................2-29
(1) Adjusting antenna height (HEIGHT).....................................................................2-29
(2) Setting automatic/manual gain circuit (GAIN AUTO/MANUAL)...........................2-29
(3) Setting automatic/harbor/manual STC circuit (SEA AUTO/MANUAL).................2-29
(4) Tuning calibration (AUTO TUNE).........................................................................2-29
(5) Resetting to the factory default ............................................................................2-29
3. CIRCUIT DIAGRAMS
Drawing No.
3.1 General Block Diagram.....................................................................E47CFB0710
3.2 Interconnection Diagram................................................................E41CGB0020
3.3 SCANNER UNIT (RB717A/718A, RB717AP/718AP)
RB717A/718A Inter Connection Diagram of 6kW/12kW Scanner Unit ...............E41CGB011A
RB717AP/718AP Inter Connection Diagram of 6kW/12kW Scanner Unit...........E41CGB001A
RB717A/718A MODULATOR BOARD (E41-100A/101A).................................. E41CGB100C
3.4 SCANNER UNIT (RB719A, RB719AP)
RB719A Inter Connection Diagram of 25kW Scanner Unit.................................E48CGB0040
RB719AP Inter Connection Diagram of 25kW Scanner Unit...............................E48CGB003A
RB719A MODULATOR BOARD (E48-100A)......................................................E48CGB110B
3.5 IF AMP BOARD
(RB717A/718A/719A, RB717AP/718AP/719AP)
IF AMP BOARD (E41-200A)...............................................................................E41CGB200A
3.6 PERFORMANCE MONITOR CONTROLLER
(RB717AP/718AP/719AP)
PERFORMANCE MONITOR CONTROLLER (E41-5000)..................................E41CGB5000
3.7 PROCESSOR UNIT (RP100A/RP100AP)
PROCESSOR UNIT...........................................................................................E47CGB030A
POWER PCB (E47-600A)..................................................................................E47CGB600B
LOGIC PCB (E47-700B).....................................................................................E47CGB700B
ATA PCB (E35-700C)........................................................................................ E35CGB700C
AIS PCB (E47-7200)...........................................................................................E47CGB7200
GYRO INTERFACE PCB (E47-510A)................................................................E47CGB510A
3.8 OPERATION UNIT (RO100A)
PANEL PCB (E40-901C)................................................................................... E40CGB910C
93842105-00 iii

4. ELECTRICAL PARTS LISTS
Page
4.1 SCANNER UNIT
(RB717A/718A/719A, RB717AP/718AP/719AP)
RB717A 6 KW SCANNER UNIT.............................................................................................4-1
RB718A 12 KW SCANNER UNIT...........................................................................................4-2
RB719A 25 KW SCANNER UNIT...........................................................................................4-3
RB717A TX/RX UNIT – 6 KW MODULATOR PCB (E41-1000)..............................................4-4
RB718A TX/RX UNIT – 12 KW MODULATOR PCB (E41-1010)............................................4-8
RB719A TX/RX UNIT – 25 KW MODULATOR PCB (E48-100A) .........................................4-12
RB717A/718A/719A TX/RX UNIT – IF AMP PCB (E41-200A).............................................4-17
4.2 SCANNER UNIT (RB717AP/718AP/719AP)
PERFORMANCE MONITOR CONTROLLER PCB (E41-5000) ...........................................4-19
4.3 PROCESSOR UNIT (RP100A/RP100AP)
RP100A PROCESSOR ASSEMBLY....................................................................................4-20
RP100AP PROCESSOR ASSEMBLY..................................................................................4-21
POWER PCB (E47-600A) ....................................................................................................4-22
LOGIC PCB (E47-700B).......................................................................................................4-25
ATA PCB (E35-700C)...........................................................................................................4-32
AIS PCB (E47-7200).............................................................................................................4-33
GYRO INTERFACE PCB (E47-510A)..................................................................................4-34
4.4 OPERATION UNIT (RO100A)
PANEL PCB (E40-901C)......................................................................................................4-38
5. PARTS MOUNT LAYOUT
6 kW/12 kW MODULATOR PCB (RB717A/RB718A), E41-100A/101A..................................5-1
25 KW MODULATOR PCB (RB719A), E48-100A..................................................................5-2
IF AMP PCB (RB717A/718A/719A), E41-200A......................................................................5-4
POWER PCB, E47-600A........................................................................................................5-5
MAIN LOGIC PCB, E47-700B................................................................................................5-5
PANEL PCB, E40-901C .........................................................................................................5-6
ATA PCB, E35-700C..............................................................................................................5-7
AIS PCB, E47-7200................................................................................................................5-7
GYRO INTERFACE PCB, E47-510A......................................................................................5-8
iv 93842105-00

6. MECHANICAL PARTS LISTS/EXPLODED VIEW DWGS
MECHANICAL PARTS LISTS Page
RB717A/718A SCANNER UNIT (E41BG20001.1) ....................................................................6-1
RB717A/718A SCANNER BOX (E41BG20010)........................................................................6-2
RB717A/718A DRIVE UNIT (E41BG20030)..............................................................................6-3
RB717A/718A TR PART (E41BG20022)...................................................................................6-3
RB719A SCANNER/TRANSCEIVER UNIT (E48BG20100) ......................................................6-4
RB719A SCANNER/TRANSCEIVER BOX (E48BG20111).......................................................6-5
RB719A DRIVE UNIT (E48BG20131).......................................................................................6-6
RB719A TR PART (E48BG20121)............................................................................................6-6
RB717AP/718AP SCANNER UNIT (E41BG20101.1)................................................................6-7
RB717AP/718AP SCANNER BOX (E41BG20112.1) ................................................................6-8
RB717AP/718AP DRIVE UNIT (E41BG20130.1)......................................................................6-9
RB717AP/718AP TR PART (E41BG20124.1).........................................................................6-10
RB719AP SCANNER/TRANSCEIVER UNIT (E48BG10101)..................................................6-11
RB719AP SCANNER/TRANSCEIVER BOX (E48BG10112)...................................................6-12
RB719AP DRIVE UNIT (E48BG10130)...................................................................................6-13
RB719AP TR PART (E48BG10121)........................................................................................6-14
RP100A/RP100AP PROCESSOR UNIT (E47BG61001).........................................................6-15
RO100A OPERATION UNIT (E47BG12103)...........................................................................6-17
EXPLODED VIEW DRAWINGS Drawing No.
RB717A/718A SCANNER UNIT.............................................................................E41BG20001.1
RB717A/718A SCANNER BOX.................................................................................E41BG20010
RB717A/718A DRIVE UNIT.......................................................................................E41BG20030
RB717A/718A TR PART............................................................................................E41BG20022
RB719A SCANNER/TRANSCEIVER UNIT...............................................................E48BG20100
RB719A SCANNER/TRANSCEIVER BOX................................................................E48BG20111
RB719A DRIVE UNIT................................................................................................E48BG20131
RB719A TR PART.....................................................................................................E48BG20121
RB717AP/718AP SCANNER UNIT ........................................................................E41BG20101.1
RB717AP/718AP SCANNER BOX.........................................................................E41BG20112.1
RB717AP/718AP DRIVE UNIT...............................................................................E41BG20130.1
RB717AP/718AP TR PART....................................................................................E41BG20124.1
RB719AP SCANNER/TRANSCEIVER UNIT.............................................................E48BG10101
RB719AP SCANNER/TRANSCEIVER BOX..............................................................E48BG10112
RB719AP DRIVE UNIT..............................................................................................E48BG10130
RB719AP TR PART...................................................................................................E48BG10121
RP100A/RP100AP PROCESSOR UNIT....................................................................E47BG61001
RO100A OPERATION UNIT .....................................................................................E47BG12103
93842105-00 v

1. GENERAL
1.1 Purpose
This service manual provides radar service technicians with the practical knowledge required to
maintain, troubleshoot, repair and re-adjust the marine radar RA80/90 series.
1.2 General Precautions
(1)Before servicing the radar, every serviceman must carefully study the contents of the
instruction manual together with attached drawings.
(2)When troubleshooting, first check that all visible wiring connections are secure and all
connectors are plugged into their mating connectors. Also confirm that all controls on the
front panel of the display unit are properly adjusted.
(3)When a faulty part is located, always remember that the prime cause might be elsewhere.
Check for prime causes of problems and repair them to prevent recurrence of the same
trouble.
(4)When reconnecting cables, PCBs, or units, after inspection or repair, observe the following
precautions.
(a) Positions correct ?
(b) Connectors properly mated?
(c) Any undue strain on wiring?
(d) Screws adequately tightened?
(5)Inspect for paint peeling, metal surface scratches or blemishes. Slight blemishes can
develop into severe corrosion. When imperfections are found, promptly sandpaper, and
retouch, or repaint these parts with a suitable paint brush dipped in clear lacquer.
1.3 Tools and Measurement Jigs
Maintenance tools and measurement jigs necessary for maintenance and adjustment of the
radar are listed below.
Table-1.1 Tools and measurement Equipment
No. Name Type Use
1 Tools
a Screwdriver Phillips Type (4mm, 2.6mm) opening unit cover
b Monkey Wrench
c Electrician's Pliers
d Long-nose Pliers
e Nippers
f Tweezers
g Soldering Iron
2 Special Tools
a Adjusting Screwdriver Adjusting trimmer cores of RF transformer and variable resistors
1.4 System configuration for radar models
1.4.1 non-IMO models
model scanner processor operation display
RA83/93 RB717A RP100A RO100A user supply
RA84/94 RB718A RP100A RO100A user supply
RA85/95 RB719A RP100A RO100A user supply
93842105-00 1 - 1

1.4.2 IMO models ( with Performance monitor and Gyro Interface )
model scanner processor operation display
RA83P RB717AP RP100AP RO100A JH17T01MMD-A2
/CF17T01SIM-A1/2
RA84P RB718AP RP100AP RO100A JH17T01MMD-A2
/CF17T01SIM-A1/2
RA85P RB719AP RP100AP RO100A JH17T01MMD-A2
/CF17T01SIM-A1/2
RA93P RB717AP RP100AP RO100A JH19T01MMD-A2
/CF19T01SIM-A1/2
RA94P RB718AP RP100AP RO100A JH19T01MMD-A2
/CF19T01SIM-A1/2
RA95P RB719AP RP100AP RO100A JH19T01MMD-A2
/CF19T01SIM-A1/2
1.4.3 PCBs in the Unit
(1) RB717A (6kW Scanner Unit)
E41-100A(MODULATOR PCB)
E41-200A(IF AMP PCB)
(2) RB718A (12kW Scanner Unit)
E41-101A(MODULATOR PCB)
E41-200A(IF AMP PCB)
(3) RB719A (25kW Scanner Unit)
E48-100A(MODULATOR PCB)
E41-200A(IF AMP PCB)
(4) RB717AP (6kW Scanner Unit with Performance monitor)
E41-100A(MODULATOR PCB)
E41-200A(IF AMP PCB)
E41-5000(PERFORMANCE MONITOR CONTROLLER PCB)
(5) RB718AP (12kW Scanner Unit with Performance monitor)
E41-101A(MODULATOR PCB)
E41-200A(IF AMP PCB)
E41-5000(PERFORMANCE MONITOR CONTROLLER PCB)
(6) RB719AP (25kW Scanner Unit with Performance monitor)
E48-100A(MODULATOR PCB)
E41-200A(IF AMP PCB)
E41-5000(PERFORMANCE MONITOR CONTROLLER PCB)
(7) RP100A (Processor Unit)
E47-600A(POWER PCB)
E47-700B(LOGIC PCB)
E35-700C(ATA PCB) (Option)
E47-7200(AIS PCB) (Option)
E47-510A(GYRO INTERFACE PCB) (Option)
(8) RP100AP (Processor Unit with Gyro I/F)
E47-600A(POWER PCB)
E47-700B(LOGIC PCB)
E35-700C(ATA PCB) (Option)
E47-7200(AIS PCB) (Option)
E47-510A(GYRO INTERFACE PCB)
(9) RO100A (Operation Unit)
1 - 2 93842105-00

E40-901C(PANEL PCB)
93842105-00 1 - 3

2. CIRCUIT DESCRIPTION
2.1 Scanner Unit The block diagram is shown in Fig.-2.1.1 to 2.1.4.
Control
A
C235AFP
UPC324
HC14
TD62004
Motor
A/D
Converter
TC35095AF
Mag.curr.
H.T.
Tune Monitor
Trigger
Motor
Trigger Band Width
Tuning
Gear
Heading
Pulse
Detector
Heading
Trigger
/Video
A
zimuth Pulse
/Heading
Control Signal
Antenna
Rotary
Coupler
Circulator
FCX68
Magnetron
MSF1422B(RB717A)
MSF1425B(RB718A)
Limiter
NJS6930
Front-End
Module
NJT1973
Pulse
Modulator
2SK1450
2SJ132
2SK738
Driver
IRFP150
uPC494G
PLL
Azimuth
Pulse
Detector
4046
HC4040
A
zimuth
Mag. Heater
Tune Meter
Log IF Amplifier
2SC3356
A
A231BFP
Video Buffer
2SD1005
2SA1213
A
A209ASP
HC4066
Fig.-2.1.1 Block Diagram (RB717A/718A)
Control
A
C235AFP
UPC324
HC14
TD62004
Motor
A/D
Converter
TC35095AF
Mag.curr.
H.T.
Tune Monitor
Trigger
Motor
Trigger Band Width
Tuning
Gear
Heading
Pulse
Detector
Heading
Trigger
/Video
A
zimuth Pulse
/Heading
Control Signal
Antenna
Rotary
Coupler
Circulator
NJC3901C
Magnetron
M1458A
Limiter
NJS6930
Front-End
Module
NJT1973
Pulse
Modulator
2SK1450
2SJ132
2SK738
Driver
IRFP150
uPC494G
PLL
Azimuth
Pulse
Detector
4046
HC4040
A
zimuth
Mag. Heater
Tune Meter
Log IF Amplifier
2SC3356
A
A231BFP
Video Buffer
2SD1005
2SA1213
A
A209ASP
HC4066
Fig.-2.1.2 Block Diagram (RB719A)
93842105-00
2 - 1

Control
A
C235AFP
UPC324
HC14
TD62004
Motor
A/D
Converter
TC35095AF
Mag.curr.
H.T.
Tune Monitor
Trigger
Motor
Trigger Band Width
Tuning
Gear
Heading
Pulse
Detector
Heading
Trigger
/Video
A
zimuth Pulse
/Heading
Control Signal
Antenna
Rotary
Coupler
Circulator
FCX68
Magnetron
MSF1422B(RB717A)
MSF1425B(RB718A)
Limiter
NJS6930
Front-End
Module
NJT1973
Pulse
Modulator
2SK1450
2SJ132
2SK738
Driver
IRFP150
uPC494G
PLL
Azimuth
Pulse
Detector
4046
HC4040
A
zimuth
Mag. Heater
Tune Meter
Log IF Amplifier
2SC3356
A
A231BFP
Video Buffer
2SD1005
2SA1213
A
A209ASP
HC4066
Performace monitor unit
KPM-20
LT1054,TL082
HC123,HC02
HC4066
Performace monitor
control
S/H TX
S/H RX
Fig.-2.1.3 Block Diagram (RB717AP/718AP)
Control
A
C235AFP
UPC324
HC14
TD62004
Motor
A/D
Converter
TC35095AF
Mag.curr.
H.T.
Tune Monitor
Trigger
Motor
Trigger Band Width
Tuning
Gear
Heading
Pulse
Detector
Heading
Trigger
/Video
A
zimuth Pulse
/Heading
Control Signal
Antenna
Rotary
Coupler
Circulator
NJC3901C
Magnetron
M1458A
Limiter
NJS6930
Front-End
Module
NJT1973
Pulse
Modulator
2SK1450
2SJ132
2SK738
Driver
IRFP150
uPC494G
PLL
Azimuth
Pulse
Detector
4046
HC4040
A
zimuth
Mag. Heater
Tune Meter
Log IF Amplifier
2SC3356
A
A231BFP
Video Buffer
2SD1005
2SA1213
A
A209ASP
HC4066
Performace monitor unit
KPM-20
LT1054,TL082
HC123,HC02
HC4066
Performace monitor
control
S/H TX
S/H RX
Fig.-2.1.4 Block Diagram (RB719AP)
2 - 2 93842105-00

93842105-00
2 - 3
2.1.1 Antenna
The antenna is a slotted array antenna, which radiates a horizontally polarized electromagnetic
wave. The outline of antenna is shown in EXPLODED VIEW. The end of rotary coupler is connected
to the transmitter and receiver through a circulator. The antenna pattern in the vertical plane is wide
enough (approximately 22/25 degrees) to ensure target detection even if the own ship rolls and
pitches.
2.1.2 HM (Heading Marker) pulse generator
A magnet fixed on main gear produces a HM pulse by closing the contact of reed-switch, S1/S101.
When magnet just arrives at the front of the reed-switch, the pulse is sent to Processor unit through
AC235AFP, U10 (6/12kW) or U14 (25kW) together with azimuth pulse. On the 6/12/25kW, the
azimuth pulse is generated 216 pulses/rotation with photo-interrupter under the motor and
converted to 2048 pulses/rotation with PLL circuit.
2.1.3 Antenna drive motor
The antenna drive motor, M101 is a DC-motor.
For 6/12kW:
A DC-motor drives the antenna controlled by U18 and Q28 to Q30.
For 25kW:
A DC-motor drives the antenna controlled by U18 and Q40 to Q42.
2.1.4 Duplexer
The duplexer consists of a circulator and a diode limiter. The circulator passes the output power
from the magnetron, V1/V101, to the antenna with very low loss, and prevents passing the power to
the receiver side. The diode limiter short circuits during transmitting and protects the FEM (Front
End Module) from damage.
2.1.5 Transmitter
The transmitter comprises a modulator and a magnetron. The modulator is a switching-type,
solid-state modulator that uses the switching action of a FET. The modulator generates a
high-voltage, negative going pulse to drive the magnetron in accordance with the trigger pulse.
(1) Modulator (6/12kW)
The FET (2SK1450), Q19, Q21, Q22 (and Q23, Q201, Q202 for RB718A) generates a high-voltage
pulse across the primary winding of the pulse transformer, T101, and this pulse voltage is stepped
up to supply the higher voltage (4.5kV/5.8kV) power to the magnetron, V101. The pulse width is
controlled by the AC235AFP, U10. The rectifier, CR101, CR102 and a resistor R101 are used to
absorb the counter electromotive force that is developed when the magnetron is turned off.
(2) Magnetron (6/12kW)
The magnetron, V101 oscillates at 9410 MHz (+/- 30 MHz) and peak power is approximately 6 kW
(RB717A/AP) or 12kW(RB718A/AP). The negative-going pulse is applied to the cathode.
(3) Modulator (25kW)
A high voltage added to the primary of the pulse transformer is stepped up and stabilized by L13, U1,
Q24 and CR2. The FET (2SK1450), Q14-Q17, Q20-Q23, Q25-Q28, Q30-Q33 generates a
high-voltage pulse across the primary winding of the pulse transformer, T101, and this pulse voltage
is stepped up to supply the higher voltage (8kV) power to the magnetron, V101. The pulse width is
controlled by the AC235AFP, U14. The rectifier, CR101, CR102 and a resister R101 are used to
absorb the counter electromotive force that is developed when the magnetron is turned off.
(4) Magnetron (25kW)
The magnetron, V101 oscillates at 9410 MHz(+/- 30 MHz) and peak power is approximately 25 kW.
The negative-going pulse is applied to the cathode.

2 - 4 93842105-00
2.1.6 Receiver
The receiver comprises an FEM and an IF amplifier.
(1) FEM (6/12kW)
The FEM, H101 mainly consists of RF amplifier, a balanced mixer, and an FET oscillator circuit.
Reflected echo signals received by the antenna are fed to the FEM through the duplexer and
converted into IF signals of 60 MHz.
The local oscillator generates at 9470 MHz and it can be adjusted by the tuning control voltage of 12
V +/- 5 V provided from U6 to U9 on IF AMP Board and U14 on Modulator Board.
(2) IF amplifier (6/12kW)
The log IF amplifier consists of low noise linear pre-amplifier, band-pass filter, logarithmic amplifier,
and tuning circuit. The pre-amplifier is the transistor Q6 with gain of about 20 dB to maintain the low
noise.
The band-pass filter consisting of L1 and C54 controls the receiver bandwidth. The receiver
bandwidth is designed to be able to change in accordance with the transmission pulse width so as
not to degrade both the short and long range performance, with oppose each other, while the
transmission pulse width is changed.
(Generally, emphasis is laid on high resolution in the short range and high sensitivity in the long
range.)
The bandwidth change is carried out by varying a Q-factor of the tuning circuit, L1 and C54. The
bandwidth is controlled by U10-P01 signal. The U10-P01 signal fed to the line of R50. When it is off,
the diode, CR2 is turned off. This rises the Q of the tuning circuit, and the IF bandwidth becomes
narrow. Conversely, it widens when the signal is on. The IF bandwidth is 3 MHz in the narrow band
and 15 MHz in the wide bandwidth. The relationship between the transmission pulse width and IF
bandwidth is shown in Table-2.1A.
The logarithmic amplifier consists of 4 pieces of the custom-made IC, AA209ASP, U2 to U4.
Another custom-made IC AA235BFP, U8 includes AFC (Automatic Frequency Control) circuit. The
ATS signal is an initial tuning switch for the auto tuning system. The M-TUNE and M.T signal are for
manual tuning system. The M.T is duty-controlled pulse signal for analog tuning system controlled
from the Processor unit.
The video signal is fed to the level adjust circuit and trigger mixing circuit on the Modulator PCB, Q1
to Q6. The video signal is mixed with the trigger and fed to the Processor unit.
Table-2.1A Transmission Pulse width and IF bandwidth Relationship
Transmission Pulse IF bandwidth
-------------------------------------------------------------------------------------------------------------------
0.08 uS, 0.25 uS wide
0.5 uS, and 1.0 uS narrow
--------------------------------------------------------------------------------------------------
(1) FEM (25kW)
The FEM, FM101 mainly consists of an RF amplifier, a balanced mixer, and an FET oscillator circuit.
Reflected echo signals received by the antenna are fed to the FEM through the duplexer and
converted into IF signals of 60 MHz.
The local oscillator generates at 9470 MHz and it can be adjusted by the tuning control voltage of 12
V +/- 5 V provided from U6 to U9 on IF AMP Board and U14 on Modulator Board.
(2) IF amplifier (25kW)
The log IF amplifier consists of a low noise linear pre-amplifier, a band-pass filter, a logarithmic
amplifier, and a tuning circuit. The pre-amplifier is the transistor Q6 with gain of about 20 dB to
maintain the low noise.
The band-pass filter consisting of L1 and C54 controls the receiver bandwidth. The receiver
bandwidth is designed to be able to change in accordance with the transmission pulse width so as
not to degrade both the short and long range performance, with oppose each other, while the
transmission pulse width is changed.
(Generally, emphasis is laid on high resolution in the short range and high sensitivity in the long
range.)

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The bandwidth change is carried out by varying a Q-factor of the tuning circuit, L1 and C54. The
bandwidth is controlled by U14-P01 signal. The U14-P01 signal fed to the line of R50. When it is
switched off, the diode, CR2 is turned off. This rises the Q of the tuning circuit, and the IF bandwidth
becomes narrow. Conversely, it widens when the signal is on. The IF bandwidth is 3 MHz in the
narrow bandwidth and 15 MHz in the wide bandwidth. The relationship between the transmission
pulse width and IF bandwidth is shown in Table-2.1B.
The logarithmic amplifier consists of custom-made IC, AA209ASP, U2 to U4. Another custom-made
IC AA231BFP, U8 includes AFC (Automatic Frequency Control) circuit. The ATS signal is initial
tuning switch for the auto tuning system. The M-TUNE and M.T signal are for manual tuning system.
The M.T is duty-controlled pulse signal for analog tuning system controlled from the Processor unit.
The video signal is fed to level adjust circuit and trigger mixing circuit on Modulator Board Q43, Q44
and Q48 to Q51. The video signal is mixed with the trigger and fed to the Processor unit.
Table-2.1B Transmission Pulse width and IF bandwidth Relationship
Transmission Pulse width IF bandwidth
-------------------------------------------------------------------------------------------------------------------
0.08 us, 0.3 us wide
0.6 us, and 1.2 us narrow
-------------------------------------------------------------------------------------------------------------------
2.1.7 Performance Monitor
KPM-20 performance monitor
The KPM-20 performance monitor (call PM on and after) is an unit on the side of the scanner
unit to monitor the radar performance both transmitter and receiver function. The operation
overview is as follows;
(1) Monitoring transmit performance:
The PM monitor the transmitter performance with receive the signal transmit from the radar
antenna with the KPM-20 antenna. The PM detect, amplify, and output the radar transmit signal
with microwave receiver circuit in KPM-20. The timing of the transmit performance monitoring is
just the end of the generation of the transmit trigger.
(2) Monitoring receiver performance:
The PM monitor the receiver performance with receive the microwave signal transmit with the
KPM-20 antenna through the radar antenna. The PM transmit the microwave signal with delayed
timing of 240 micro-seconds from the radar transmitting, approximately 20NM in range. The
signal will be appeared on the IF signal received with the radar antenna together with typical
reflecting echo signal.
(3) Evaluation of the transmitter/receiver performance:
The transmit and received signals are processed with PM circuit (E41-5000) as peak level
detection, sample, and hold. Then, the signal is converted to digital data with A/D converter on
the modulator PCB and send to the display or processor unit. Evaluations are carried out with the
control software in the display or processor unit.
Control PCB(E41-5000)
The PCB(E41-5000) has the KPM-20 transmit/receiver timing control, signal peak detection,
sample, and signal hold circuit on the board. The Fig.2.43 is the block diagram for E41-5000
PCB.
(1) Power supply for -5V
The switched capacitor power supply IC(LT1045CP) U2 and U6 convert the voltage from 12V to
-5V. The U2 is for the E41-5000 and U6 for the KPM-20. The output current rating is 100mA for
each. The output voltage can be adjusted by R8 and R16 respectively.
(2) Receiver timing generator
The 1 us width PM TRG signal is generated delayed with 240 us from transmit trigger(TRG2).
The U4, U5, and U7 generate timing pulses for receiver system. The 15 us control signal fed to
the analogue switch U9 for peak detection circuit is generated by the circuit.
The 50 us width sampling signal gate is generated based from PM-GATE of KPM-20.
(3) Peak detector and sample & Hold

The buffer amplifier U8 invert the receive signal(negative video) to positive signal. Then, detect
the peak level with peak detect circuit U10, CR1, CR3, C23, R26, and R27. The analogue switch
U9 is a reset switch for detected peak level signal. The detected peak signal is sampled & hold
with U11, U12, U13, R29, and C34, and output as the receive signal(SH-RX).
(4) Transmitter timing generator
The analogue switch U9 is a peak detect circuit for the transmit signal(PM SIG). The 15 us width
control signal(ASW2/ASW2N) for the analogue switch U9 is generated from 1 us width transmit
trigger(TRG3) on the modulator PCB.
The 20 us width sampling signal(SH2) for sample & hold circuit is generated based from TRG3.
(5) Peak detector and sample & hold circuit for transmitter system
The peak detector detects the peak level of the transmit signal(PM SIG) with the peak detect
circuit U9, U10. The analogue switch U9 is a reset circuit for the detected peak level. The peak
level is output as transmit signal(SH-TX) after sample & hold processing with U11, U12, U13.
(6) Signals
PM ON/OFF The ON/OFF control signal for KPM-20.
PM TUNE The tuning voltage signal(5V to 10V) for the receiver module of the
KPM-20.
E41-1000 KPM-20
E41-1000
E41-1000
E41-1000
12V
(2) Receiver
timing generator
GND
TRG3
PM ON OFF
PM TUNE
5V 5V
KPM-20
KPM-20
-5V
(1) Power supply
for -5V
E41-1000
E41-1000
5V
-5V
GND
TRG2
(4) Transmitter
timing generator
-5V
5V
(3) Peak detector,
S ample & Hold
(5) Peak detector,
Sample & hold
circuit for
transmitter
system
E41-1000
5V
VIDEO
SH RX
PM GATE
E41-1000
SH TX
KPM-20
E41-1000
PM TRG
KPM-20
PM SIG
E41-1000
E41-1000
KPM-20
PM ON OFF
KPM-20
PM TUNE
KPM-20
-5V
5V
5V
KPM
-
20
Fig. 2.1.7. Block Diagram for control PCB
2 - 6 93842105-00

2.1.8 Data Communication
The scanner unit is controlled by the Processor unit through the communication line, DAT, DAT-R.
The communication data format is shown in Table-2.2.
Table-2.2 Data Format
-------------------------------------------------------------------------------------------------------------------
Type asynchronous serial data (half duplex)
Structure Start bit 1 bit
Data bit 8 bits
Stop bit 2 bits
Parity bit none
Speed 9600bps
Format binary note: not in ASCII code.
Level 0 to 5 V
The following control signals and data are included in the serial communication line.
Control:
(1) Trigger on/off and trigger frequency
(2) Transmit pulse width
(3) IF band width
(4) Antenna motor on/off
(5) Manual tuning voltage control
(6) Auto tuning start/stop
(7) Auto tuning center frequency
(8) Heater voltage control (For 25kW)
(9) Tail-biter on/off
(10) PM on/off (op)
(11) PM tuning voltage control (op)
Data:
(1) Tuning meter level
(2) Tuning voltage monitor
(3) High voltage monitor
(4) Magnetron current monitor
(5) Magnetron heater voltage monitor
(6) Scanner discrimination cord
(7) PM RX signal (op)
(8) PM TX signal (op)
2.1.9 Checkpoint and Signal
On the scanner PCB, there are checkpoints for maintenance and adjustment. Checkpoints are
shown in Table-2.3A, Table 2.3B and Table 2.3C.
Table-2.3A Check point and Signal (Modulator PCB for 6/12kW)
Checkpoint signal range (unit)
-------------------------------------------------------------------------------------------------------------------
TP1 Ground
TP2 Transmit pulse 0-5V pulse
TP3, TP4, TP5 Trigger pulse
TP7 magnetron current
TP9 Motor drive pulse
J4-5, J4-4 Motor drive voltage 12 or 24V
-------------------------------------------------------------------------------------------------------------------
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2 - 8 93842105-00
Table-2.3B Check point and Signal (Modulator PCB for 25kW)
Note: Reference value
Repetition period (us) on L pulse: 442-540 (Center: 470)
M2 pulse: 732-986 (Center: 801)
M1 pulse: 1261-1523 (Center: 1338)
S pulse: 1832-2442 (Center: 1998)
Checkpoint Signal Range
-------------------------------------------------------------------------------------------------------------------
TP1 (MAG C1) Magnetron current 0 to 8.3 V Width 1.26 us on L pulse
(positive pulse) 0 to 7.2 V Width 0.66 us on M2 pulse
0to6.5VWidth0.35usonM1pulse
0to6.0VWidth0.12usonSpulse
TP2 (PULSE W) TX pulse gate (after adjust.) 4.8 to 0 V Width 1.13 us on L pulse
(negative pulse) 4.8 to 0 V Width 0.51 us on M2 pulse
4.8to0VWidth0.21usonM1pulse
4.8 to 0 V Width 0.055 us on S pulse
TP3 (PWM) Motor power supply switching wave form Duration: 7.155 us
(positivepulse)
STD motor speed 0 to 11.2 V Width 1.92 us
TP4 (TRIG 3) Tuning pulse gate 0 to 4.9 V Width 1.29 us on L pulse
(positive pulse) 0 to 4.9 V Width 0.68 us on M2 pulse
0to4.9VWidth0.37usonM1pulse
0to4.9VWidth0.13usonSpulse
TP5 (40V-R) Return of Motor power supply 0.01 Vdc
TP6 (TRIG 2) TX pulse gate 0 to 4.9 V Width 1.22 us on L pulse
(positive pulse) 0 to 4.9 V Width 0.61 us on M2 pulse
0to4.9VWidth0.31usonM1pulse
0to4.9VWidth0.15usonSpulse
TP7 (TRIG 1) Trigger for Processor 0 to 4.9 V Width 1.02 us on ALL pulse
(positivepulse)
TP8 (HT CONT) Magnetron heater voltage control 4.4 Vdc on ST’BY
2.7VdconLpulse
3.1VdconM2pulse
3.3VdconM1pulse
3.9VdconSpulse
TP9 (MAG C2) Magnetron 2.1 Vdc on L pulse
1.6VdconM2pulse
1.3VdconM1pulse
0.66VdconSpulse
TP10 (GND) Ground 0 Vdc
TP11 (V/TRIG) Video+ trigger Trigger: 0 to 4.7 V Width 1.3 us
Video: 0.2 to -3.3 V Main bang echo:
(Width 1.59 us)
Delay 2.36 us from trigger rise edge
TP12 (PM TUNE) Tune voltage for performance monitor 0 – 10 Vdc
J1-1 (+24V) +24V 24.3 Vdc
J1-3(+12V) +12V 12.5Vdc
J1-5 (DAT) Interface data 4.97 to 0.56 / 0.73 V (Burst pulse)
J1-7 (BP/SHF) Azimuth+ HM Azimuth: 2.8 to 4.8 V on 25 rpm
On Duty factor per 1.172 ms Width 0.685 ms:
HM: 2.8 to 0.66 V Width 0.482 ms 1 pulse/round
J1-9 (V/TRG) Video+ trigger Trigger: 0 to 4.7 V Width 1.3 us
Video: 0.2 to -3.3 V Main bang echo (Width 1.59 us)
Delay 2.36 us from the trigger rise edge
J2-1 (+250V) +250V 250 Vdc
J2-4,5-6,7 Motor supply voltage 38.5 Vdc

(+40V-+40V-R)
J3-1 (HC) Heading contact 5 to 0 V Width 61 ms 1 pulse/round on 25 rpm
J4-1 (V) Photo coupler diode voltage 1.15 Vdc
J4-2 (AZI) Photo coupler out 0.78 to 5 V Duty: 11.11 ms Width: 6.6 ms on 25 rpm
J4-5 (MOTOR+) Motor drive voltage 10.5 Vdc
-4 (MOTOR-)
TB1 (HV) High voltage 257 Vdc
CR5 anode side MAG. heater voltage line 8.0 Vdc on ST’BY
6.5VdconLpulse
6.7VdconM2pulse
6.9VdconM1pulse
7.5VdconSpulse
-------------------------------------------------------------------------------------------------------------------
When the Modulator Board (E48-100*) is replaced, you need to set up specific functional
parameters using the presets provided on the board. See the Table-2.4 for the relevant presets and
rated setting value.
Table-2.4 Presets and rated ranges on the Modulator Board
Modulator Board (E48-100A)
A
d
j
ustment Conditions Measurin
g
p
oint Settin
g
ran
g
e
Magnetron heater voltage
(WARNING: Never attempt to transmit while the measurement!)
R69 (HT LP) ST’BY T101 pin 4 and pin 6 4.8+/-0.1Vdc
(Connect TP8 to ground)
R86 (HT STB) ST’BY T101 pin 4 and pin 6 6.3+/-0.1Vdc
(Set TP8 open)
High voltage
R65 (HV ADJ) TX ON TB1 and ground 257+/-1Vdc
TX pulse width
R66 (PULSE W) TX ON/S pulse, TP2 and ground 55+/-5ns
5V to 0V (negative pulse)
Motor speed (Standard: 25rpm)
R58 (SPEED S) TX ON J4-5 and J4-4 10.5+/-1Vdc
Motor current limiter
R70 (CLIMIT) Standard speed, TX ON
R70-2 and TP5 (40V-R) 0.14+/-0.01Vdc
IF AMP Board (E41-200A)
Adjustment Conditions Measuring point Setting range
-------------------------------------------------------------------------------------------------------------------
Video level
R1 (VIDEO) L pulse, TX ON Modulator Board TP11 -3.5+/-0.1Vp-p*
*Main bang echo
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2.2 Processor Unit (RP100A/RP100AP)
In the Processor unit, there is a control PCB. Interface connectors are all on the PCB. The block
diagram is shown in Fig.-2.2.1.
Video
Memory
"256kx8"x8
Video Amplifier
/Signal
Processing
A
A239AFP
Signal
Processing
KCD-64
Display
Control
FPGA（U57）
Advanced
CRT
Controller
HD63484
CPU
HD64F2398
RAM
128kx8
Frash ROM
1Mx8
2Mx8
Control Signal
Video
/Trigger
A
zimuth
/Heading
SCANNER UNIT
D/A
converter
Power
Supply
2SK2379
2SK1421
uPC494G
TC4011BF
Ship's Power
+5V
+24V
250V(H.T.)
-12V
+12V
+40V
Operation unit
Panel pcb
E40-901C
V
ideo
Memor
y
"256kx8"x6
D/A
Converter
FMS3818
LVDS
Converter
DS90C387A
VIdeo
Buffer
Opa692x3
Memory &
Panel
Control
FPGA（U37）
Display unit
JH 17T01 MMD,
JH 19T01 MMD,
etc.
Fig.-2.2.1 Block Diagram
2.2.1 POWER PCB (E47-600A)
The power supply circuit consists of:
a. Noise filter, C15, C16, C19, C21, L6, L14,
b. Power switch control, U2, CR24, CR26, Q2, Q3, Q5,Q33.
c. Power supply for power switch circuit, Q1, CR4.
d. Regulator, U1, U3, Q7 to Q13, Q15 to Q17 and L7 to L9, CR8, CR9,CR23.
e. Main inverter, U4, Q20 to Q25.
f. Over current protector, Q18, Q19.
g. Over input voltage protector, CR1, CR2, CR3.
The power supply is designed to regulate the +5 V output voltage controlled by "e. regulator" circuit.
The feedback signal from +5 V line is detected through U1. The error amplifier and switching duty
control performed by U3 and CR5. The controlled power from regulator circuit is switched by U4,
Q24, and Q27 to drive the main transformer, T1.
When ship's source voltage is too high, "h. over input voltage protector" circuit will shut down the
power supply.
When over loaded, "g. over current protector" detects the current and will shut down the power
supply.
The output voltages are:
+5V for logic circuit,
+12V for scanner and LCD Logic, etc.,
-12V for analog circuit
2 - 10 93842105-00