Magnavox MX 9012R, MX 9212, MX 9112 Installation And Servise Manual

DGPS 12 CHANNEL
INSTALLATION
AND
SERVICE MANUAL
Prepared by
Magnavox Electronic Systems Company
West Coast Division
2829 Maricopa Street
Torrance, Califomia 90503

West Coast Division
Magnavox reserves the right to make changes to its products and
specitications without notice.
Printed in the United States of America

ABOUT TI·HS MANUAL
Congratulations on your purchase of a Magnavox DGPS 12 Channel Navigator/Reference Station.
It represents the Enest in DGPS technology today.
As for this manual, it provides all the infomation you’ll need to install and test your Magnavox
DGPS receiver for proper operation. This manual is used for MX-9012R, MX 9112, or MX 9212
installations. Besides step-by-step procedures, you will find valuable information on what problems
to avoid and how best to ensure trouble-free operation.
The instructions in this manual follow the order in which you’re likely to use them. We suggest,
however, that you read this manual through before proceeding. This will help you see the overall
picture of what you must do. In this way, you’ll be able to better anticipate installation
requirements.
At the back of this manual you’ll find two tear-out sheets: one is a Problem Report Sheet; the other,
a Reader Comment Sheet. On the inside back cover is a Limited Warranty Statement and Service
Request Information. Ifyou would like more in-depth information about Magnavox DGPS products,
refer to the referenced documents, below.
Thank you.
IMPORTANT NOTICE
GPS satellites still remain in the trial stages. Moreover, the stated policy of the U.S.Govemment
is to degrade accuracy for non·military use to within 100 meters RMS. The Magnavox DGPS
receivers provide increased accuracy when differential correction is available.
REFERENCED DOCUMENTS:

• Magnavox DGPS 12 Channel Navigator Operator’s Manual, R—7220: Describes how
to connect and operate the Magnavox Navigator using the Magnavox developed
Control and Display (CDU) program. ..

• Magnavox DGPS 12 Channel Reference Station Operator’s Manual, R-7277:
Describes how to connect and operate the Magnavox Reference Station using the
Magnavox developed Control and Display (CDU) program.

• Magnavox DGPS 12 Channel Technical Reference Manual, R-7278. Contains
information for programming the Magnavox DGPS Navigators and Reference
Stations.

• NMEA-0183 Specihcation: Defines the hardware and software requirements.

• EIA RS·232C Specification: Defines the hardware and software requirements for an
RS-232 data interface.

• EIA RS-422 Specification: Defines the hardware and software requirements for an
RS-422 data interface.
i

Eiga

SYSTEM INSTALLATION ................................................... 1

Unpacking Your DGPS Receiver .......................................... 1

Installation Preparation ................................................. 2

Installing the Antenna .................................................. 4

Easy Access to Maintenance ....................................... 4

Avoiding Vertical Obstructions ...................................... 4

Cable Lengths .................................................. 4

Avoiding EMI Effects ............................................. 4

Mounting the Antenna ............................................ 5

Procedure for Navigator Antenna Installation ......................... 5

Procedure for Reference Station Antenna Installation ................... 8

Installing the DGPS Receiver ........................................... 10

Choosing a Safe Physical Environment ............................... 10

Allowing for Proper Distances ..................................... 10

Allowing Access to Rear Panel ..................................... 10

Power and Memory Backup .......................... Q ............ 11

Procedure ..................................................... 12

Connecting the Receiver to Extemal Equipment ............................. 14

Standard Port Uses ............................................. 14

Initial Power-on Conditions ............................................. 17

Test Procedure ...................................................... 18

MAINTENANCE .......................................................... 19

The Receiver Assembly ................................................ 20

Replacing the Circuit Cards ............................................. 21

Disassembly ................................................... 21

Removing the Circuit Cards ....................................... 21

Replacing the Circuit Cards and Re-assembling the Unit ................. 23

Resetting the Receiver Memory .......................................... 25

Procedure ..................................................... 26

Resetting the Solid State Fuse ........................................... 26

Troubleshooting ...................................................... 26

APPENDIX A ............................................................ 27

Receiver Specifications ................................................ 27

ii

ILLUSTRATIONS
Figgrg Lag;

1 Navigator Antenna Mounting Location Recommendations ...................... 5

2 Navigator Vertical/Horizontal Antenna Mounting and Dimensions ................ 6

3 Antenna Connector Assembly ............................................ 7

4 Reference Stn Vertical/Horizontal Antenna Mouning & Dimensions ............... 8

5 Reference Stn Antenna Connector Assembly (TNC) ........................... 9

6 Rear Panel of the DGPS 12 Channel Receiver .............................. 11

7 Installation Template .................................................. 12

8 MULTI-PORT Interface Connector Pin Assignments ......................... 15

9 Magnavox Receiver to PC Interface Connector and Cables ..................... 16

10 Receiver Partially Disassembled ......................................... 19

11 Exploded View of the Receiver .......................................... 23

TABLES
Table hg;

1 System Parts ......................................................... 1

2 Tools and Materials Required for Installation and Maintenance .................. 3

3 Compass Safe Distance ................................................ 10

4 Electrical Interfaces and Data Formats .................................... 14

5 Receiver Parts List ................................................... 22

6 Troubleshooting Table ................................................. 26

iii

SYSTEM INSTALLATION
UNPACKING YOUR DGPS NAVIGATOR
Perform the following three steps and verify the packaged items against those listed in Table 1.

1. Remove the contents from the packing container.

2. Save the packing container. You may need it for storage or retum shipment.

3. Inspect each item for in·transit damage. Ifyou see evidence of damage, notify both
the carrier and Magnavox (see the back side of the manual cover).
Table I. System Pans
I DESCRIPTION Part Number 1
1 Console Assembly, MX 9112 900555-808 1
I
1 Console Assembly, MX 9212 900555-807 1
Console Assembly, MX 9012R 900555-806 1
Volute Antenna Assembly w/15m Cable (MX 9212, MX 9012R) 819766-801 1
Low Profile Antenna Assembly w/gnd Plane 723008-801
1 (Mx 9112) 1
15 Meter RG-6 Cable (MX 9112) 567271-801 1
System Installation Kit, including the following: 741699-803
Power Cable Assembly 1
Mounting Screws (4)
Cable Ties (4) 1
Type-F Coaxial Connector
Mounting Template 1
Mating DB-25P Connector
lnterlace Cable Assembly 567284-2 1
CDU Program Diskette 471899-2
Magnavox DGPS 12 Channel R·7218 1
Installation and Service Manual 1
Magnavox DGPS 12 Channel R-7278 1
Technical Reference Manual 1
Magnavox DGPS 12 Channel Navigator R-7220 1
Operator's Manual (MX 9112, MX 9212)
Magnavox DGPS 12 Channel Reference Station R-7277 [
Operator's Manual (MX 9012R, MX 9112) 1
1

SYSTEM INSTALLATION
INSTALLATION PREPARATION
Installing your DGPS receiver is easy. But you do have important details to think about. Ifyou plan
your installation carefully, you’ll save time, work, and materials. More importantly, your receiver will
operate with fewer problems and more efficiency. If this is your first GPS installation, we suggest
you allow 6 to 8 hours for installation and test.
Here are the most important items to consider before and during installation:
Antenna

· proper length and routing of cable.
safe distance from high-power antennas and transmitters.
appropriate height and mounting surface, providing a 360 degree view of
horizon.
Receiver

· safe distance to navigating compass, equipments sensitive to small magnetic
fields, or equipments emitting strong RF or magnetic Eelds.
physical and visual accessibility for operator monitoring and peripheral
interfaces.
physical environment.
Interface

• do you need special cables?
will you need an RS-422 to RS-232 converter?
Power

· cabling.
dc power source.
Now that you know what the issues are, let’s begin your installation. Table 2 lists the few tools
needed.
2

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SYSTEM INSTALLATION
INSTALLING THE AN'I'ENNA

Installing the antenna is the most crutial part of the system installation. How and where you install
your antenna, with its cabling and integral preamplifier, can greatly affect its sensing efhciency.
Figure 1 shows you both good and bad installation sites for the navigator antenna.
Keep the following guidelines in mind for an ideal site: Try to install the antenna where it has a
clear view of the sky whether on land, sea, or air.
Egsy Access to Maintenance
You want to locate the antenna for easy access and maintenance. Stay safely away from
interfering high-power energy sources like radar and radio antennas. Locate the antenna at
least 9 feet (about 3 meters) away from and out of the transmitting beam of high-power
transmitters.
Avoiding Vertical Obstructions
You should not install the antenna closer than 15 feet (about 4.5 meters) to any large vertical
obstruction. The object is for the antenna to see the horizon freely through 360 degrees and
5 to 90 degrees above the horizon. Be sure that you have the base of the antenna at least
3 feet (about 1 meter) above any large, metallic, horizontal surface.
Note: Small diameter obstructions, such as masts, booms, and kingpins do not seriously
degrade signal reception, but such objects must not eclipse more than a few degrees of any
given bearing.
Cable Lengths
Standard lengths of RG-6/U, 75—ohm, coaxial antenna cable are 50 feet (about 15 meters).
Ifyou need a longer cable length than the installation kit provides, you can extend the cable
up to a total length of 100 feet, with additional RG-6/U coaxial cable connected by an RF
throughline connector (bullet). If you need additional cable, order Magnavox part number
MB0101, 50 Foot Cable Extension Kit. For cable lengths between 100 and 200 feet (30 to
60 meters), an in-line RF amplifier is required. Order Magnavox part number PA6817C,
Cable Line Amplifier (does not include coaxial cable).
Avoiding EMI Eaects
Try to route the coaxial cable between the antenna and the receiver connector directly; direct
paths reduce electromagnetic interference (EMI) effects. When doing this, avoid running
cable close to high-power lines, such as radar or radio-transmitter lines.
If you must cross antenna cables, do so at 90 degrees, so that magnetic fields are not
coupled.
Finally, consider EMI effects related to antenna cable length; longer lengths can increase
EMI effects.
4

SYSTEM INSTALLATION

2. Attach the antenna to a rail or pole using a standard antenna mount, or other
appropriate hardware, as shown in Figure 2.
MOUNTING HARDWARE
2 U - BOLTS. 6-32 THREADS
BRACE PLATE
4 LOCK NUTS
THE U-BOLTS FIT 13mm
TO 28mm (0.5 TO 1.1In)
DIA PIPE OR RAIL
130 MM
(5.16 IN.)
28 MM
(1.1 IN.)
MAXIMUM
as uu l
(1.71 IN) <— 82.5 MM . 1
T (3.25 IN.) T
Figure 2. Navigator Vertical/Horizontal Antenna Mounting and Dimensions

3. Route the cable as directly as you can from the antenna, bring the end of the cable
to the receiver installation site.
CAUTYON
Be sure you don? crimp the cable with the tiedowns. Also, don'! exceed the bend radius
of I inch (25 mm). It will alter the electrical characteristics ofthe cable.
6

4. Cut the antenna cable to the required length. Leave a little extra length to correct
any mistakes.

5. Install the F-type connector. Refer to Figure 3 for connector installation instructions.
CAUTION
Be sure that the center conductor ofthe cable comes through the connector and sticks out
beyond the connector surface at least 3/8-inch (1 cm). Otherwise, you won’t have a
dependable antenna connection.

6. Use a volt-ohmmeter to verify that no short circuit exists between the center
conductor and the shield of the coaxial connector after you attach it. You should
measure about 2-K ohms g 10% between the antenna connector and ground (shield).
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Figure 3. Antenna ConnectorAssembly
7