Magnavox MX 9012R User manual

MAGNAVOX
DGPS12CHANNEL
INSTALLATION
AND
SERVICEMANUAL
Preparedby
MagnavoxElectronicSystemsCompany
WestCoastDivision
2829MaricopaStreet
Torrance,Califomia90503

(°’MagnavoxElectronicSystemsCompany1993
WestCoastDivision
Magnavoxreservestherightto make changes to its products and
speciticationswithoutnotice.
PrintedintheUnitedStates of America

ABOUTTI·HS MANUAL
Congratulationson your purchase of a Magnavox DGPS 12Channel Navigator/Reference Station.
Itrepresents the Enest in DGPStechnology today.
Asfor thismanual, itprovides all the infomation you’ll need to install and testyour Magnavox
DGPSreceiver for proper operation. This manual isused forMX-9012R, MX 9112, or MX 9212
installations.Besides step-by-step procedures, you will find valuable information on what problems
toavoid and how bestto ensure trouble-free operation.
Theinstructions inthis manual followthe order in whichyou’re likely to use them. We suggest,
however,that youread this manualthrough before proceeding. This willhelp you see the overall
pictureof what you must do. In this way, you’ll be able to better anticipate installation
requirements.
Atthe back of this manual you’llfind twotear-out sheets: one is a Problem ReportSheet; the other,
aReader Comment Sheet. On the inside back cover is a Limited Warranty Statement and Service
RequestInformation. Ifyouwould like more in-depth information about Magnavox DGPS products,
referto the referenced documents,below.
Thankyou.
IMPORTANT NOTICE
GPSsatellites still remain inthe trialstages. Moreover, the stated policy of the U.S.Govemment
isto degrade accuracy for non·military use to within100 meters RMS. The Magnavox DGPS
receiversprovide increased accuracy when differentialcorrection isavailable.
REFERENCEDDOCUMENTS:
•Magnavox DGPS 12 Channel Navigator Operator’s Manual,R—7220: Describes how
toconnect and operate the Magnavox Navigator using the Magnavox developed
Controland Display (CDU) program. ..
•Magnavox DGPS 12 Channel Reference StationOperator’s Manual, R-7277:
Describeshow to connect and operatethe Magnavox Reference Station using the
Magnavox developedControl and Display(CDU) program.
•Magnavox DGPS 12 Channel Technical Reference Manual, R-7278. Contains
informationfor programming the Magnavox DGPS Navigatorsand Reference
Stations.
•NMEA-0183 Specihcation: Defines the hardware andsoftware requirements.
•EIA RS·232C Specification: Defines the hardware and softwarerequirements for an
RS-232data interface.
•EIA RS-422 Specification: Defines the hardware andsoftware requirements foran
RS-422data interface.
i

TABLEOFCONTENTS
Eiga
SYSTEMINSTALLATION...................................................1
UnpackingYourDGPSReceiver.......................................... 1
InstallationPreparation.................................................2
InstallingtheAntenna..................................................4
EasyAccesstoMaintenance....................................... 4
AvoidingVerticalObstructions......................................4
CableLengths..................................................4
AvoidingEMIEffects.............................................4
MountingtheAntenna............................................5
ProcedureforNavigatorAntennaInstallation ......................... 5
ProcedureforReferenceStationAntenna Installation ................... 8
InstallingtheDGPSReceiver........................................... 10
ChoosingaSafePhysicalEnvironment ............................... 10
AllowingforProperDistances..................................... 10
AllowingAccesstoRearPanel ..................................... 10
PowerandMemoryBackup.......................... Q ............ 11
Procedure.....................................................12
ConnectingtheReceivertoExtemal Equipment ............................. 14
StandardPortUses.............................................14
InitialPower-onConditions.............................................17
TestProcedure......................................................18
MAINTENANCE..........................................................19
TheReceiverAssembly................................................20
ReplacingtheCircuitCards............................................. 21
Disassembly...................................................21
RemovingtheCircuitCards....................................... 21
ReplacingtheCircuitCardsand Re-assembling the Unit ................. 23
ResettingtheReceiverMemory.......................................... 25
Procedure.....................................................26
ResettingtheSolidStateFuse ........................................... 26
Troubleshooting......................................................26
APPENDIXA............................................................27
ReceiverSpecifications................................................27
ii

ILLUSTRATIONS
FiggrgLag;
1NavigatorAntennaMountingLocation Recommendations ...................... 5
2NavigatorVertical/HorizontalAntennaMounting and Dimensions ................ 6
3AntennaConnectorAssembly............................................ 7
4ReferenceStnVertical/HorizontalAntenna Mouning & Dimensions ............... 8
5ReferenceStnAntennaConnector Assembly (TNC) ........................... 9
6RearPanelofthe DGPS 12 Channel Receiver .............................. 11
7InstallationTemplate..................................................12
8MULTI-PORTInterfaceConnectorPin Assignments ......................... 15
9MagnavoxReceivertoPC Interface Connector and Cables ..................... 16
10ReceiverPartiallyDisassembled......................................... 19
11ExplodedViewofthe Receiver .......................................... 23
TABLES
Tablehg;
1SystemParts.........................................................1
2ToolsandMaterialsRequired for Installation and Maintenance .................. 3
3CompassSafeDistance................................................ 10
4ElectricalInterfacesandData Formats .................................... 14
5ReceiverPartsList................................................... 22
6TroubleshootingTable.................................................26
iii

SYSTEMINSTALLATION
UNPACKINGYOUR DGPS NAVIGATOR
Performthe followingthree steps and verify the packaged items against those listed in Table 1.
1.Remove the contents from the packingcontainer.
2.Save the packingcontainer. You may need it for storage or retum shipment.
3.Inspect each itemfor in·transit damage. Ifyou see evidence of damage,notify both
thecarrier and Magnavox (seethe back side of themanual cover).
TableI. System Pans
IDESCRIPTION Part Number 1
1Console Assembly, MX 9112 900555-808 1
I
1Console Assembly, MX 9212 900555-807 1
ConsoleAssembly, MX 9012R 900555-806 1
VoluteAntenna Assembly w/15m Cable (MX 9212, MX 9012R) 819766-801 1
LowProfile Antenna Assembly w/gnd Plane 723008-801
1(Mx 9112) 1
15Meter RG-6 Cable (MX 9112)567271-801 1
SystemInstallation Kit, including the following: 741699-803
PowerCable Assembly 1
MountingScrews (4)
CableTies (4) 1
Type-FCoaxial Connector
MountingTemplate 1
MatingDB-25P Connector
lnterlaceCable Assembly 567284-2 1
CDUProgram Diskette 471899-2
Magnavox DGPS 12 Channel R·72181
Installationand Service Manual 1
Magnavox DGPS 12 Channel R-7278 1
TechnicalReference Manual 1
Magnavox DGPS 12 Channel Navigator R-7220 1
Operator'sManual (MX9112, MX 9212)
Magnavox DGPS 12 Channel Reference Station R-7277 [
Operator'sManual (MX9012R, MX9112) 1
1

SYSTEMINSTALLATION
INSTALLATIONPREPARATION
InstallingyourDGPSreceiveris easy. But you do have important details to think about. Ifyou plan
yourinstallationcarefully,you’llsave time, work, and materials. More importantly, your receiver will
operatewithfewerproblemsand more efficiency. If this is your first GPS installation, we suggest
youallow6to8 hours for installation and test.
Herearethemostimportant items to consider before and during installation:
Antenna
·properlengthandrouting of cable.
safedistancefromhigh-powerantennas and transmitters.
appropriateheightandmountingsurface, providing a 360 degree view of
horizon.
Receiver
·safedistancetonavigating compass, equipments sensitive to small magnetic
fields,orequipmentsemittingstrong RF or magnetic Eelds.
physicalandvisualaccessibilityfor operator monitoring and peripheral
interfaces.
physicalenvironment.
Interface
•doyouneedspecial cables?
willyouneedanRS-422 to RS-232 converter?
Power
·cabling.
dcpowersource.
Nowthatyouknowwhat the issues are, let’s begin your installation. Table 2 lists the few tools
needed.
2

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SYSTEMINSTALLATION
INSTALLING THEAN'I'ENNA
Installingthe antenna is the mostcrutial part of the system installation. Howand whereyou install
yourantenna, withits cabling and integralpreamplifier, can greatly affect its sensing efhciency.
Figure1 shows youboth good and bad installationsites forthe navigator antenna.
Keepthe following guidelines in mind for an ideal site: Try to install theantenna where it has a
clearview ofthe sky whether onland, sea, or air.
EgsyAccess toMaintenance
Youwant to locate the antenna foreasy access and maintenance. Stay safely awayfrom
interferinghigh-power energy sources like radar and radio antennas. Locate the antenna at
least9 feet (about3 meters) away fromand outof the transmitting beamof high-power
transmitters.
AvoidingVertical Obstructions
Youshould not install theantenna closer than 15 feet (about 4.5 meters) to any large vertical
obstruction.The object is for the antenna tosee the horizon freely through 360 degrees and
5to 90 degrees above the horizon. Be sure that you have the baseof the antenna at least
3feet (about1 meter) above any large, metallic, horizontalsurface.
Note:Small diameter obstructions,such as masts, booms, and kingpins do notseriously
degradesignal reception, but such objects must noteclipse more thana few degrees of any
givenbearing.
CableLengths
Standardlengths of RG-6/U,75—ohm, coaxial antenna cable are 50 feet (about15 meters).
Ifyouneed a longer cable length than the installationkit provides, you can extend the cable
upto a total length of 100 feet, with additional RG-6/Ucoaxial cable connected by an RF
throughline connector (bullet).If youneed additional cable, order Magnavox part number
MB0101,50 FootCable Extension Kit. For cable lengths between 100 and200 feet (30 to
60meters), an in-line RF amplifier is required. Order Magnavox part number PA6817C,
CableLine Amplifier (does not includecoaxial cable).
AvoidingEMI Eaects
Tryto route thecoaxial cable between the antenna and the receiver connector directly; direct
pathsreduce electromagnetic interference (EMI) effects. Whendoing this, avoidrunning
cableclose to high-power lines, such as radar or radio-transmitter lines.
Ifyou must cross antenna cables, do so at 90degrees, so that magnetic fields are not
coupled.
Finally,consider EMI effectsrelated to antenna cable length; longer lengths can increase
EMIeffects.
4

SYSTEMINSTALLATION
2.Attachtheantennato a rail or pole using a standard antenna mount, or other
appropriatehardware,asshownin Figure 2.
MOUNTINGHARDWARE
2U-BOLTS.6-32 THREADS
BRACEPLATE
4LOCKNUTS
THEU-BOLTSFIT13mm
TO28mm(0.5TO1.1In)
DIAPIPEORRAIL
130MM
(5.16IN.)
28MM
(1.1IN.)
MAXIMUM
asuul
(1.71IN)<—82.5MM . 1
T(3.25IN.)T
Figure2.NavigatorVertical/HorizontalAntenna Mounting and Dimensions
3.Routethecableas directly as you can from the antenna, bring the end of the cable
tothereceiverinstallationsite.
CAUTYON
Besureyoudon?crimp the cable with the tiedowns. Also, don'! exceed the bend radius
ofIinch(25mm). It will alter the electrical characteristics ofthe cable.
6

SYSTEMINSTALLATION
4.Cuttheantennacable to the required length. Leave a little extra length to correct
anymistakes.
5.InstalltheF-typeconnector. Refer to Figure 3 for connector installation instructions.
CAUTION
Besurethatthecenter conductor ofthe cable comes through the connector and sticks out
beyondtheconnectorsurfaceat least 3/8-inch (1 cm). Otherwise, you won’t have a
dependableantennaconnection.
6.Useavolt-ohmmeterto verify that no short circuit exists between the center
conductorandtheshieldof the coaxial connector after you attach it. You should
measureabout2-Kohmsg 10% between the antenna connector and ground (shield).
GQIPIIBHG
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WITHAGILBERTID.G-GRT-|5|OR AN
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Figure3.AntennaConnectorAssembly
7

SYSTEMINSTALLATION
INSTALLINGTHERECEIVER
Becauseofitscompactsize and light weight, you have lots of flexibility in how and where you install
yourMagnavoxDGPS12Channel Receiver. An adjustable mounting platform lets you mount the
unitinanyorientation,even on the overhead. To ensure a precise installation, each unit comes with
aninstallationtemplate.
Youwillwanttochoose both a physically safe environment and an eleetromagnetically safe
environment.
ChoosingaSafePhysicalEnvironment
Locateaninstallationsiteaway from excessive heat sources, such as heating vents or
equipmentheatexhausts.Alsoavoid sites (examples would be port holes/windows and
hatchesthatopentothe outside) where the How of humid salt air might corrode intemal
components.
Despitethesturdinessofthe Magnavox receiver, don’t subject it to hard, continuous
vibration.Ifyouthinkexcess vibration is a problem, order the vibration isolation kit (P/N:
B19807-801)
AllowingforProgrDistances
Givesomethoughttothe location of the unit. You may wish to visually monitor the three
statusindicators(red,yellowand green LEDs, willed traffic lights) on the front panel while
workingwithotherequipment.If you intend to monitor the receiver with a personal
computer,you’llwanttoview the screen while at a particular location. A careful choice of
receiverlocationwillminimizecable lengths between components. For Navigators, you’ll
alsowanttoallowa safe distance from the receiver to the navigation compass to minimize
compassdeviation.RefertoTable 3 as your guide.
Table3.CompassSafeDistance
VAT4(ATTji_SWQM_§4l {l
·PosslbloCompassDevlatlon»
IE"""°"`°"'
I
{Receiver170cm(67 in.) 75 cm (30 in.)
M¤~¤¤.
AllowingAccesstoRearPanel
Youwillwantaccessto the ANTENNA input connector, the 1 PPS output connector
(perhaps),andtheMULTI-PORTInterface DB 25S connector (Figure 4).
Note:The1PPS(1 pulse per second) output connector provides an optonal timing source;
the1·secondtimingpulsesare accompanied by an ASCII message giving you the precise time
ofeachpulse.
10

SYSTEMINSTALLATION
Wheninstalling, leave S inches (about 13 centimeters) or more of clearance behind the back
panelof the unit. You will needthat much room for dressing the cables and getting atthe
rearpanel p8ItS.
asn©··=--·
1PPl
GIITVT
@5,
%© © •¤¤
_lTI·|’$'I’I|'|'
Figure6. Rear Panelof the DGPS 12 Channel Receiver
zrand Memory Backug
Yourreceiver requires aminimum of 10 Vdc and a maximum of 32 Vdc.It requiresan
averageof 320 milliamps at 15Vdc (average: 4.8 watts;maximum: 6 watts).
AnON/OFF/REMOTE switchon the back panel determines whether the unit power is
controlledlocally or remotely. To control theunit power remotely, you must have the power
switchset to the REMOTE position and be able to apply 5 Vdc to a relay switch in the unit.
Remotepower is controlledthrough the DB 25P connector, pins 1 and 25. Refer to the
wiringdiagram, Figure 8.
CMUTION
Forrelhrble operatibn,you must pmviae dc power to the Magnavox receiver withinthe 10 to 32
Vdcrange. Never apply voltagesoutswe this range.
TheMagnavox receiverpower supply does provide over-voltage protection. In addition, an
intemallithium battery gives you backup power protection for random accessmemory
(RAM)for up to tive years. Another safeguard is an intemal thermal circuit breaker
protectingthe unit fromelectrical surges(you may have need to reset it; see "Resetting the
SolidState Fuse" under "Maintenance").
11

SYSTEMINSTALLATION
Connectagroundwireto the GND stud. Connect the ground wire at the other end
totheelectricalground(the user supplies this variable length ground wire not
smallerthan14Awg.;no more than 1 meter - about 3 feet - in length). This wire
helpsdisipateEMIsignalsto reduce interference in the Navigator and other
equipments.
Connecttheunitpowercable to a dc power source.
CAUTION
Besureyouconnectthe positive lead ofthe power input cable (identified by the white strip)
tothepositiveterminalof the dc power supply source. You can verify the polarity of the
cablebycheckingforcontinuity between the outer ring of the connector and the negative
(·)powerlead.
Connecttheantennacableto the ANTENNA input connector (refer to Figure 6).
13

SYSTEMINSTALLATION
CONNECI`INGTHERECEIVERTOEXTERNAL EQUIPMENT
Externalequipmentconnectstothe MULTI-PORT Interface connector on the rear panel of the
receiverunit(seeFigure6). The interface consists of four Input/Output (I/O) serial ports; two RS-
232portsandtwoRS-422 ports. IBM compatible (DOS-based) software controls the
communications.Figure6showsyou the MULTI-PORT Interface connector pin assignments. If
youareloggingdatawith a personal computer (PC) on one of the two RS-422 ports (2 and 4), you
willneedtheoptionalRS-422 to RS-232 data converter kit, P/N 741692-804. You determine the
exactuseoftheindividual I/O ports by your needs and choice of associated equipment. You may,
forexample,usetheMagnavox Navigator to navigate as a stand-alone unit or as a component in an
integratedsystem.
StandardPortUses
Ports1and3are RS-232 ports; ports 2 and 4 are RS-422 ports. Port 1 is fixed as the Control Port.
Allportsaredefaultedto 9600 baud. Here are their standard functions:
•Port1·RS-232, Operational control and data messages (9600 baud default)
[input/output]
•Port2-RS-422, Measurement (Raw data) [output]
•Port3-RS-232, DGPS Corrections I/O (MX-SOR) [input for navigators, output for
referencestations]
•Port4-RS-422, Equipment/NMEA [input/output]
Allportshaveselectablebaud rates of 300 to 19,200 baud. Table 4 details port functions of both
dataandelectricalinterfaces.
Table4.ElectricalInterfacesand Data Formats
PORT1PORT2PORT 3 PORT 4
INRS-232RS-422RS-232RS-422
OUTRS-232RS-422RS-232RS-422
DATAFORMATS
PORT1PORT2PORT 3 PORT 4
INCONTROLNOTACTIVEDGPS I/O NMEA-0183
MESSAGESEQUIPMENT
OUTCONTROLMEASUREMENTDGPSI/O NMEA-0183
MESSAGESRAWDATAEQUIPMENT
14

SYS'I`EMINS'I'ALLATION
DB25PCONNECTOR, CONNECTS TO
MULTIPORTINTERFACE CONNECTOR
I"`I
I/ I I
II
1 II REM 0N(-> nsmors Pwn
25 V I I REM on (+) 0¤NTR0|-
"I I Pom 1 our
10 RS-232
I24 I I PORT 1 IN PORT II
II PORT 1 GROUND
3 { I Pom2 OUTPUT (+I
1:I I PORT 2 0u1·I=·u1· (-I RS422
II PORT 2 INPUT (+_ F’¤RT 2
14 II PORT 2 INPUT (·)
8 II PORT 3 OUTPUT
II RS-232
SI I PORT 3 INPUT PORT3
II PORT 3 GROUND
5 II PORT 4 OU'I' PUT (+)
*7 IPom 4OUTPUT (-I gs.422
4 II Pom 4INPUT (+) P¤F1T 4
16 II PORT 4 INPUT (-)
I3I I EXT PWR 12 V (+) POWER OUTPUT
12 II Ex·r Pvvn mu (60 MA MAX)
2°I I Evarrr INPUT `
21 II Evzm nsrunu
L- I
GROUND SHIELD ONLY AT
MAGNAVOX ENDOF CABLE
Figure8. MULTI-PORT Interface Connector Pin Assignments
15