Anritsu RA725UA User manual

RA725UA/RA726UA
Marine Radar
InstructionManual
4th Edition
Communications Systems Division
Anritsu Corporation
Simrad Part Number 855 - 106537

RA725UA/RA726UA Marine Radar
Instruction Manual
May 21,1993 (First Edition)
May 26,1993 (2nd Edition)
Jun 3, 1993 (3rd Edition)
July 5,1993 (4th Edition)
~
Copyright 1993. ANRITSU CORPORATION
All Rights Reserved. No Pan of this manual may be reproduced without the prior written permission
of Anritsu Corporation.
The contents of this manual may be changed without prior notice.
printed in Japan
ii

WHAT TO DO
IF AN ACCIDENTAL ELECTRIC SHOCK OCCURS
First,immediatelyswitchOFF the power to the equipmentcausingthe shock. If thepowercannotbe
cut, get the victim away from the equipment causingthe shock by pushing or pulling them with an
insulated board or cloth,etc.
If theshockvictim has lostconsciousness,or if they are not breathingorhave nopulse, call a physi-
cian immediately. If aphysician is not close at hand, give artificial respiration andcardiacmassage
as first aid to the shock victimuntilmedicalhelp arrives.
1.
Artificial Respirationand Cardiac Massage
Do not move the victim unless they are in danger. Proceed immediatelyasdescribedbelow.
2.
4.
Put the victimon his/herback on a firmsurface likeadeskorfloor.Quickly loosen anytight
clothing around the neck and chest.
Pullu up the chin so that the top of the headrotates backand put your fingers into the mouth to
clear thethroat and windpipe of anyobstructionlike the tongue orvomit.
If thereisno chestorabdomenmovement, start artificialrespiration;if thereisno pulse, start
cardiacmassageimmediatelyaswell.
If there are two people rescuers, one should give artificialrespiration while the other gives
cardiacmassage. Cardiac massage shouldbe givenfivetimesforeachtime the victim’s lungs
areartificiallyinflated.
If thereisonly onerescuer, cardiacmassage shouldbegiven15times for eachtwo lunginfla-
tions.
Notes
1. Continuegiving emergency artificialrespirationand cardiacmassage even while moving the
victimon a stretcheror in an ambulance to medical help. Move thevictim gently.
2. When the victim starts breathing normally and the hands and feet get warm and the pulse
returns, cover them
with a blanket to conserve body heat.
3. If thevictimis breathingnormally but hasnot recoveredconsciousness,turnthemontheirside
(comaposition) so that breathing
is not stopped again by an obstruction (vomit or tongue) of
thewindpipe or throat.
iv
3.

HIGH VOLTAGES
Although this radar presents no dangers in normal usage, dangerous high voltages are
used insidethe equipment. Observe the following safety precautions when repairing or
inspecting the radar.
1. Always set the display POWER switch, and the main switch for the radar on the
distribution board to OFF.
2. Even after setting these switches to OFF, there may be high residual voltage at the
anode cap of the CRT, at the
300-volt line of the scanner connection cable, at the
scanner 300 - volt circuit, and at the PFN (pulse adjustment circuit) of the MODPC
board Ground these points using a conductor such asa wire lead or screwdriver
whose
one end is grounded and check that there isnoresidual voltage with a tester.
REPAIRING ANDINSPECTING SCANNER UNIT
Usually the scanner unit is installed in a high place. Consequently, a slight mishap can
result in a serious accident. Note the following precautions when repairing and inspect-
ing the scanner unit.
1. Setthe displayPOWER switch and themain switchfor distributing powerto the radar
to OFF so that there isnodangerof the antenna rotating duringrepairand inspection
In addition, before starting any repairs or inspection, post a sign on the display unit
indicatingthat maintenance is in progress so that there is no danger of a third party
accidentally setting these switches to on.
2. When repairing or inspecting the scanner unit wear a safety harness and provide a
secureplatform so that there is nodangerof fallingeven when thevessel lists o r when
there is an unexpected incident such as an earthquake.
ELECTROMAGNETIC RADIATION
DO NOT approach the antenna while itis transmitting. NEVER get within 15 meters of
the antennaradiatingsurfacewhile the antennais transmitting. In addition, at inspection,
NEVER look intothewaveguide during transmission.
CRT MAINTENANCE
The CRT used in thisradar has a high vacuum and it is extremely dangerous if it is
damaged. Observe the following precautions.
1. Never rest anything onthe CRT.
2. Never press onthe front display surfaceof the CRT.
3. Never drop the display unit.
UI
v

Artificial Respiration Method
As shownin thediagramon theright,pinch the victim‘snose with onehand so that air is not expelled
from the nose and lift the back of the neck with the otherhand,
Place your mouth over the victim’s mouth and breathintothe victim’smouth for 1to 1.5 seconds
until your lungs become empty. The volume of exhaled is about half that of deep breathing.
Check that the victim‘s chest rises when you exhale. If itdoesnot,checkthatthereis noblockagein
the victim’s mouth orthroat
Do this quickly at first and then proceedat about 12inflations perminute.Do not stopuntil medical
help arrives.
W
Cardiac Massage Method
As shownin the on the right, placethe base of thepalmof onehand overthe chestabout 1/
3rdof the way up from the bottom, of the rib cage. Put theotherhand on top of that hand.
Press the victim’s chest firmly by applying your weight without bendingyour elbows so that the
topress toohard or you may break the victim‘s ribs.
victim‘s chestdepressedabout3or4 cmthenrelease thepressureimmediately date.
Be careful not
fi-
Repeatthisoperation aboutonceper second. A

ABOUT THIS MANUAL
This manual describeshow to operateand maintain the RA725UA/RA726UA marineradar. Thefull
range of the radar functions are explainedin this operationmanualbutthe basic operations can be
performed afterreadingparagraphs 2.1 and 2.2. To better understand how theradarfunctions,read
APPENDIX C (INTERPRETING RADAR IMAGES).
For installation of this radar or forconnection of the related equipment, refer to the APPENDIX B
INSTALLATION.

CONTENTS
WARNINGS...............................................................................................
WHAT TO DO IF
AN ACCIDENTAL ELECTRICSHOCK OCCURS ..............
ABOUT THIS MANUAL .........................................................................
iii
iv
vii
SECTION1 INTRODUCTION......................................................... 1
SECTION2 OPERATION.............................................................
2..1 Part Names............................................................ .............................
2.2 BasicOperations .............................................
2.3 Auto/ManualModes...............................................
23.1 AutoMode .................................................
23.2 Manual Mode ..........................................
2.4 Key Functions........................................................................
2.4.1 Track Recording..................................
2.43 SettingOff-Centering.............................
2.43 SettingImageMagnification....................
2.4.4 SettingGuard Zone................................
2.45 SettingRange Rings.................................
2.4.6 Adjusting SeaClutter
Suppression(STC) .........................
2.4.7 AdjustingRain and Snow
Clutter Suppression (FTC) ...........
2.4.8 AdjustingGAIN....................................
2.4.9 ErasingHead Marker.................................
2.4.10 SettingDisplayMode ...............................
2.4.11 SettingSecond EBL...................................
2.4.12 SettingSecond VRM....................................
2.4.13 SettingFloating EBL/VRM.....................
2.5 Manual FrequencyTuning..............................
2.6
2.4.14 SuppressingRadar Interference............. 19
Information fromNavigation Equipment.........
2.7 ChangingDisplay Language............................
3
4
6
8
8
9
10
10
10
11
11
13
14
14
15
15
16
17
17
18
19
20
20
22
iii
iv
viii

SECTION 3 SETUP MODE ...................................……………. 23
3.1 Basic Operations ...................................... …….. 23
3.2Setup Menu......................................................... 24
(1) SYSTEMCHECK.......................................................................... 24
(2) DISPLAY PRESET ................................ 24
VRM Units, Buzzer Volume,
Picture Hold, SHF Flash,
Parallel Cursor, North Mark,
SIC Curve, Tune mode (Set
Frequency Tuning Method)
(3) KEY ASSIGNMENT.............................. 26
(4) AUTO TUNE CALIBRATION............... 26
(5)TINTING ADJUSTMENT ................…… 26
(6)HEAD DIRECTION ADJUSTMENT..... 26
SECTION 4 MAINTENANCE AND INSPECTION......................... 27
SECTION 5 REPAIR. ..............................................................................29
5.1 Abnormal Microcomputer .................................…………………… 29
5.2 Self Diagnostic Inspection .................................…. 30
5.3 Checking Voltages and Fuses-............................…. 30
APPENDIX A SPECIFICATIONS ..............................................………. 33
APPENDIX B INSTALLATION ..................................................……… 37
APPENDIX C INTERPRETING RADAR IMAGES ..........................…. 55
DRAWINGS
GENERAL SYSTEM DIAGRAM..........................…... 24W140914
INTER-CONNECTION DIAGRAM .......................….. 24W140789
DISPLAY UNIT EXTERNAL VIEW ......................…. 23W62985
SCANNER UNIT EXTERNAL VIEW .....................… 24W124259
69-1E-A RECTIFIER UNIT EXTERNAL VIEV.......... .24W140790
RP113A RECTIFIER UNIT EXTERNAL VIEW .......…23W56729
CIRCUIT DIAGRAM FOR DISPLAY UNIT.............. ..23W62571
CIRCUIT DIAGRAM FOR POWER SUPPLY........... ..23W62734
CIRCUIT DIAGRAM FOR SCANNER UNIT..........……….24W140809
ix

SECTION 1
INTRODUCTION
The RA725UA/RA726UA is a compact marine radarwhich uses a 12-inch orange CRT as the dis-
play and has an output of 5/10 kW.The radarachieveshighperformance through useof amicrocom-
puter, and image processing LSI, and several newlydeveloped signal-processing LSIs.Referto
APPENDIX A for detailed specifications.
This radar is composed of the following Standard and Optional components.
Standard Components:
Main unit RA725UA 5 kW output 10.8 V to 40Vdc of input voltage
10.8 V to 40 Vdc of input voltage
Antenna
RA726UA 10 kW output
3 ft, 4ft, 6ft
10.8 V to 40 Vdc

SECTION 1 INTRODUCTION
Optional Components:
- Rectifires
RP113A Inputvoltage: lOO/ll0/220 Vac
69 - 1E - A Inputvoltage: 1OO/110/115/120/125/200/220/230/240/250 Vac
* Gyro - InterfaceUnit
NZ2OA
Magnifier lense
RZ702A
Thefollowing equipmentcan be connectedto the radar. For the interfaceinformation, see Appendix
B, INSTALLATION.
RelatedEquipment:
*LORAN
GPS
* Buzzer
Magnetic Compass
* Gyro Compass InterfaceUnit
* Radar
Setup Mode
This radar can be set to the Setup mode where the front panelkeyconfiguration canbe changedor the
diagnostics can be activated. It is also used during installation for setup of the radar. refer to Section
3for details.
2
Buoy