MX575A MX575B D/GPS Compass Installation Manual · DGPS correction data ... compensate for orientation errors. ... manual). For example, if a gyro compass heading provides 183.2°

MX575A

MX575BD/GPS Compass

Installation Manual

Manual

Simrad

MX575A

MX575BD/GPS Compass

English

Document no:3508-102-70920

Revision: C

Date: August 2010

The original language for this document is English.

In the event of any discrepancy between translated

versions and the English version of this document,

the English document will be the official version.

To the best of our knowledge, the content in this

publication was correct at the time of printing.

As we are continously improving our products we

retain the right to make changes to the product and

the documentation at any time. Updated manuals

are available from our website www.simrad-

yachting.com and are free to download.

Copyright 2010 by Navico Holdings AS.

IMPORTANT NOTICE!!

THE MX575A/B D/GPS COMPASS IS AN AID TO NAVIGATION ONLY.UNDER NO CIRCUMSTANCES SHOULD IT BE USED IN LIEU OF AUTHO-

RIZED GOVERNMENT CHARTS. ITS ACCURACY CAN BE AFFECTED

BY MANY FACTORS SUCH AS EQUIPMENT DEFECTS, ENVIRONMEN-

TAL CONDITIONS, OR IMPROPER OPERATION. THE USER IS RESPON-

SIBLE FOR SAFE NAVIGATION OF THE VESSEL. THIS INCLUDES

CONSULTING AUTHORIZED GOVERNMENT CHARTSAND EXERCISING

COMMON PRUDENCE AND NAVIGATIONAL JUDGEMENT AT ALL TIMES.

How To Contact Us?

Contact your local Simrad dealer for:

• Installation, Service, & Technical Support

• Sales of Accessories

• Hardware and Software Upgrades

Unlike many other consumer electronics industries which only sell consumer

electronic devices, your marine dealer is often your best advisor for installation

and service of your new GPS receiver. Simrad strongly encourages you to

utilize the knowledge and experience of your sales and service dealer.

Should you need to contact us directly for new sales, upgrades, repair ser-

vice, or technical support, we can be reached at the following:

International:

MX Marine (USA)

A Division of NAVICO, Inc.

23868 Hawthorne Blvd., Suite 201

Torrance, California 90505

USA

+1 310 791 8213 (Telephone)

+1 310 791 6108 (Fax)

www.mx-marine.com

In Europe:

NAVICO UK Ltd

Premier Way, Abbey Park

Romsey, Hampshire

S051 9DH

United Kingdom

+44 (0)1794 510010 (Telephone)

+44 (0)1794 510006 (Fax)

www.navico.com

ii

Contents

1. General ............................................................................................ 1

1.1 MX575 D/GPS Beacon Operation .................................................. 2

1.2 Satellite Based Augmentation System (SBAS) ............................... 2

1.3 Receiver Autonomous Integrity Monitoring (RAIM) ..................... 2

1.4 Understanding the MX575 D/GPS Satellite Compass .................... 3

1.5 Supplied Equipment ........................................................................ 4

2. MX575 Mounting ............................................................................ 5

2.1 MX575 Mounting Guidelines ......................................................... 6

2.2 Installation Procedure ...................................................................... 7

2.2.1 Mounting ................................................................................. 7

2.2.2 Fixed Base Mounting .............................................................. 8

2.2.3 Pole and Rail Mounting ........................................................ 13

2.3 Connecting to a Power Source ...................................................... 23

3. MX575 Operation ......................................................................... 24

3.1 MX575 Antenna Cable ................................................................. 24

3.2 Standard Data Interface to the CDU ............................................. 25

3.3 Alternative Data Interface ............................................................. 31

3.4 Data Interface to PC or Other Navigation Systems ...................... 34

4. MX575 Configuration ................................................................... 35

4.1 Configuring the MX575 as a GPS Satellite Compass ................... 37

4.2 The NAV 5 & NAV 6 Compass Display Screens ......................... 39

5. MX575 Specifications ................................................................... 40

6. Data Output ................................................................................... 44

6.1 Proprietary Input Data Messages .................................................. 51

PRODUCT WARRANTY AND LIMITATION OF LIABILITY ........ 65

MX575A/B DGPS Compass

iii

Figure 1 – MX575 Mounting Orientations.................................................... 5

Figure 2– MX575 antenna location relative to other antennas ..................... 6

Figure 3 - MX575 with Fixed-Mount base ................................................... 7

Figure 4 - MX575 with Pole-Mount base ..................................................... 8

Figure 5– Fixed-Mount base ......................................................................... 9

Figure 6 - Bottom view of Fixed-Mount base ............................................... 9

Figure 7- Running cable through the fixed base mount .............................. 10

Figure 8- Running cable through the fixed base ......................................... 10

Figure 9- Power/Data cable key and keyway .............................................. 11

Figure 10- Connecting the Power/Data cable to the MX575 ...................... 11

Figure 11- Fastening the fixed-base to the MX575 ..................................... 12

Figure 12- Fastening the fixed-base to the MX575 ..................................... 12

Figure 13- Threading on the lock nut and washer ....................................... 14

Figure 14 - Running the cable through the pole base .................................. 15

Figure 15- Running the cable through the pole base ................................... 15

Figure 16 - Running the Cable through the Pole Mount ............................. 16

Figure 17 - Completed cable run ................................................................. 16

Figure 18 - Threading the Pole-Base onto the mount ................................. 17

Figure 19 – Pole-Base threaded onto mount ............................................... 17

Figure 20 - Power / Data cable key and keyway ......................................... 18

Figure 21 - Connected Power / Data cable .................................................. 19

Figure 22 - Fastening the Pole Base to the MX575 .................................... 20

Figure 23 - Threading the lock nut against the pole base ............................ 20

Figure 24- Locking the MX575 once aligned ............................................. 21

Figure 25 - Lining up the alignment sight ................................................... 22

Figure 26 - Correctly Lined-up alignment sight .......................................... 22

Figure 27 –Standard connection to MX420 (Port 3) through Cable A ....... 26

Figure 28– Standard connection to MX420/2 (Port 3) through the junction

box ............................................................................................................... 27

Figure 29–Standard connection to the MX420/8 (Port 3) through ............. 28

Figure 30 – Standard connection to MX500/MX510/MX512 ANT port

connection using a 3-meter antenna cable assembly ................................... 29


iv

Figure 31 – Standard connection to the MX500/MX510 Antenna port

through the MX5XX junction box .............................................................. 29

Figure 32 – MX575 connection to the MX512 Antenna port through the

MX512 Junction Box .................................................................................. 30

Figure 33 – Alternative connection to MX420/2 CDU (PORT 2) as a GPS

Satellite Compass only ................................................................................ 31

Figure 34- MX575 Interface to MX420/8 CDU (PORT 2) as a GPS Satellite

Compass only .............................................................................................. 32

Figure 35 - MX575 Interface to MX5xx CDU (PORT 1) as a GPS Satellite

Compass only .............................................................................................. 33

Figure 36- RS-232 serial interface to PC or other navigation systems ....... 34

Figure 37 – ROT Setup with MX420 CDU ................................................ 36

Figure 38 – Compass Setup with MX420 CDU .......................................... 38

Figure 39 – ROT Setup with MX420 CDU ................................................ 38

Figure 40 – NAV 5 Compass Display Screen ............................................. 39

Figure 41 – NAV 6 Compass Display Screen ............................................. 39


1

1. General

This manual describes the installation and operation of the MX575A & MX575B D/GPS Satellite Compass. They share common functionality and installation thus they will be generally called MX575. The specific model number will be called upon to describe a unique functionality.

The MX575 is designed to work interactively with the MX-Marine Control and Display Unit (MX420 and MX5xx series) or as a stand-alone positioning and heading device connected to a PC running ECDIS or other navigation software.

When connected to an MX CDU (i.e. MX420 or MX5xx), it can be controlled to function in several modes, namely;

• GPS positioning only

• Auto or manual DGPS mode using the Coast Guard beacon stations

• WAAS (Wide Area Augmentation System-US system)*

• EGNOS (European Geostationary Overlay System)*

• RAIM (Receiver Autonomous Integrity Monitoring)**

The MX575 is designed to be used as:

• source of GPS positioning and heading information for IMO compliant GPS and AIS installation

• source of positioning for IMO compliant ECDIS and other charting software • a backup heading source in the event that the primary gyro is not available

Before installing the MX575 D/GPS Satellite Compass, please read this manual carefully to ensure proper installation and operation of the unit. * Not IMO approved GPS Augmentation Systems ** Available only when the MX575 is connected to an MX CDU


2

1.1 MX575 D/GPS Beacon Operation

The MX575 D/GPS Satellite Compass is an integrated GPS and beacon receiver unit that is fully automatic and usually does not require user intervention in most cases. It will automatically search for available GPS satellites and beacon differential stations as soon as power is applied.

The internal 2-channel beacon receiver performs a database search for beacon stations that cover its present position. The first channel tracks the nearest beacon station frequency while the second channel searches for and collects beacon almanac data for other available beacons stations. Should it find another station that is closer, it will automatically switch the primary channel to the new station.

The MX575 D/GPS automatically selects the closest beacon station or can be controlled through the MX420 CDU to manually select a specific beacon frequency.

1.2 Satellite Based Augmentation System (SBAS)

When SBAS is available, the MX575 can be controlled (using the CDU) to track the Satellite Based Augmentation Systems (SBAS) like the WAAS (US), EGNOS (European) and MSAS (Japan) satellites. These geostationary satellites transmit DGPS correction data (just like the Coast Guard beacon stations) using the GPS frequency.

1.3 Receiver Autonomous Integrity Monitoring (RAIM)

RAIM is a software algorithm in the MX575 program that monitors the GPS system error constantly. When the GPS system error exceeds a predetermined value (100 meters), the RAIM feature sends an alarm code to the MX CDU to sound a RAIM unsafe alarm. This feature requires at least five or more GPS satellites to operate properly. If the position solution error exceeds a preset limit a “RAIM Unsafe (R-)” or “RAIM Caution (R?)” alarm will be indicated in the MX CDU. This means that the accuracy of the position cannot be guaranteed at that point in time. The operator is advised to use the GPS position with caution until the RAIM indicator switches to (R+) denoting safe RAIM condition. Position errors may be caused by unhealthy


3

satellites, incorrect pseudoranges, poor GPS satellite geometry, excessive atmospheric interference and problems at particular reference stations. The RAIM messages will only become available when it is connected to the MX CDU

1.4 Understanding the MX575 D/GPS Satellite Compass

The MX575 is a complete GPS heading and positioning system in a single enclosure that requires only one power/data cable connection. It has been designed primarily for the Marine market applications. This manual has been written to address the primary uses of the MX575 in the Marine industry.

The MX575 houses two tightly coupled high-performance GPS receivers, dual GPS antennas, a DGPS beacon receiver module, power supply circuit, a single-axis rate gyro, a tilt sensor, and H-field internal beacon antenna. The rate gyro and tilt sensors are used to improve system performance and to provide backup heading information in the event that the primary GPS heading solution is not available due to GPS signal blockages.


4

1.5 Supplied Equipment

The following items are supplied with the MX575 Kit:

Description Part Number

MX575 A or B DGPS Compass

Comprising: MX575A D/GPS Compass 3508 102 70900 (or)

MX575B D/GPS Compass 000-10280-001-Sensor

Accessories: 15m Power/data Cable 3508 102 70910

(VNDR# 051-6157-002)

MX575 Manual 3508 102 70920

Pole mount 3508 102 70730

Fixed Mount 3508 102 70740

Mounting Kit 3508 102 70750

8 base mount screws

2 Torx screw bits

1 1-in-14TPI stainless steel jam nut

1 stainless steel washer

Table 1 - MX575 Kit


5

2. MX575 Mounting

The preferred orientation for the MX575 D/GPS Satellite Compass is parallel to the axis of the vessel. In other words, it should be pointing towards the bow of the boat. This mounting configuration will provide the ability for the MX575 to output the positioning, heading and pitch of the vessel.

Mounting it perpendicular to the axis of the vessel is also acceptable and will allow calculation of the roll of the vessel. The MX CDU has an offset option to compensate for orientation errors.

Figure 1 – MX575 Mounting Orientations

If a gyro compass is available, this could be used as reference to calibrate the physical heading of the MX575 and its corresponding heading measurements to true heading of the boat by entering a heading offset (refer to pages 34-37 of this manual). For example, if a gyro compass heading provides 183.2° while the MX575 provides a heading reading of 184.0°, a bias of -0.8° (the bias is added)


6

should be programmed into the MX575 to calibrate its heading. Obviously, the physical orientation of the MX575 could be adjusted to correct for this deviation.

2.1 MX575 Mounting Guidelines

• Install the MX575 where it has a clear view of the sky around it. • Locate the MX575 for easy access and maintenance. • Stay away from high-power energy sources such as radar, SSB, INMARSAT

and other transmitting radio antennas by 5 meters or more. • Locate the MX575 at least 10 meters away from and out of the transmitting

beam of radar and other high-power transmitters. • Mount the MX575 low to avoid excessive position and speed errors while

underway. • Mount the MX575 as far away as possible from large metal structures.

Note: If you are not sure if the chosen location is appropriate, you can mount the MX575 temporarily and operate it with the MX420 CDU. Monitor the operation of the MX575 while you turn on other on-board electronic equipment. Move the MX575 around until the MX575 operates satisfactorily then mount it permanently.

1 M.3 M.

INMARSATANT.

RADAR ANT.

Mx575

VHF OR MF ANT.

MAINMAST

MOUNT THE MX575 D/GPS Compass 10 M. (Min) FORWARD OF MAIN MAST

10 Meter (min.)

10 M.

10

M(m

in)

Mx521

Figure 2– MX575 antenna location relative to other antennas


7

2.2 Installation Procedure

2.2.1 Mounting

The MX575 may be mounted with either the fixed-base or pole-mounting base. Both mounts are supplied with the system.

The fixed base allows you to mount the MX575 on horizontal flat surfaces, such as radar platforms. The pole mount is designed for use with 1”-14TPI threaded mounts, such as pole and rail mounts.

Note: Installations that use the pole mount require the use of the supplied hexagonal jam nut and flat washer in order to mechanically couple the MX575 system to the pole mount with less stress on the threads. If the nut/washer combination is not used, failure of the pole mounting base could occur, which may damage the MX575. Any such damage to the MX575 system resulting from not using the nut / washer combination is not covered under warranty.

The following figure shows the MX575 mounted with the fixed base.

Figure 3 - MX575 with Fixed-Mount base


8

The following figure shows the MX575 with the pole mount.

Figure 4 - MX575 with Pole-Mount base

2.2.2 Fixed Base Mounting

The supplied fixed base is intended to allow you to mount the system on a flat surface. This surface may be something that you fabricate for the sake of the installation, or may be something that already exists on your vessel or an off-the-shelf item, such as a radar mounting plate.

The fixed base has the following features:

• 6 holes for mounting onto the MX575 enclosure • A channel through the mount for the power/data cable. • Two small keys to aid the alignment of the base to the enclosure. • Four slots used for fastening the mounted enclosure to the vessel. • Four tunnels that allow you to route the cable outside the base and along the

mounting surface. The slots on the bottom of the base allow for a degree of adjustment when the MX575 is secured in its final location. Note: You do not necessarily need to orient the MX575 precisely as you can enter a heading offset to accommodate for any bias in heading measurement due to installation.


9

The base also features four tunnels that allow you to bring the power/data cable out from within the mount in order to route it along the surface of the plate beneath the MX575 system. Alternatively, you may wish to route the power/data cable through the mounting surface rather than bringing it out through one of the tunnels.

Figure 5– Fixed-Mount base

Figure 6 - Bottom view of Fixed-Mount base


10

To install the MX575 using the fixed base, insert either end of the power/data cable through the center of the fixed base as shown in the following two figures.

Figure 7- Running cable through the fixed base mount

Figure 8- Running cable through the fixed base


11

Align the connector keyway of the cable to the key of the connector mounted on the MX575 enclosure as show in Figure 8. Insert the cable-mount connector into the bulkhead connector, aligning the locking ring at the same time.

Figure 9- Power/Data cable key and keyway

Once inserted, rotate the ring clockwise until it locks. The locking action is firm, but you will feel a positive ‘click’ when it has locked, as shown in the following figure.

Figure 10- Connecting the Power/Data cable to the MX575


12

Once you have secured the connector, slide the fixed base up to the bottom of the MX575 enclosure. There are two alignment keys on top of the base that must fit into two holes of the enclosure. Once you have aligned the base, use a screwdriver fitted with the supplied Torx T20 bit to fasten the base to the enclosure using the supplied self-tapping screws. Fasten the screws firmly, but be careful not to strip the thread.

The following two figures show the location of the screw holes.

Figure 11- Fastening the fixed-base to the MX575

Figure 12- Fastening the fixed-base to the MX575


13

Once you have fastened the fixed-base to the MX575 enclosure using six mounting screws, you are ready to fasten the assembly to your mounting surface. We recommend that you use machine screws that have an Allen Key head (hexagonal) and an “L-shaped” Allen Key, as there may not be sufficient clearance between the bottom of the antenna and your mounting surface to use a normal screwdriver.

Note: As we do not supply the mounting surface, you will need to supply the appropriate fastening hardware required to complete the installation of the MX575 and mount assembly.

2.2.3 Pole and Rail Mounting

The pole mount incorporates a 1inch-14TPI thread. To aid in the installation of the MX575, we supplied a hex jam nut and washer. These are used to secure the antenna in a particular direction without bottoming out the system on the threaded pole. Additionally, the nut and washer distributes forces associated with vibration onto the bottom surface of the MX575 pole mount.

Caution: Do not bottom out the MX575 pole base on the threaded mount. Such manner can damage the system. Use of the jam nut and washer are mandatory for pole mounting. Any damage resulting from not using these pieces to mount the MX575 will not be covered under warranty.

You will need to supply the pole or rail mount hardware that you wish to use. Once you have installed the pole or rail mount, thread the hexagonal jam nut onto to the mount, followed by the stainless steel washer, both supplied with the MX575 system. Thread the nut onto the mount approximately 8 to 10 full turns to provide adequate mounting thread for the pole mount base. The following figure illustrates this step.


14

Figure 13- Threading on the lock nut and washer

When mounting the MX575 using the pole mount, the cable must be run first through the center of the pole mount base (from top to bottom), through the pole, and then through any bulkheads as needed (the power/data connector is too large to fit through the threaded portion of the pole mount base).

Note: Be sure to have some slack to move the cable in and out of the pole mount by a few inches. This will allow you to connect the cable to the MX575 easily.


15

The following three figures detail the process of routing the cable.

Figure 14 - Running the cable through the pole base

Figure 15- Running the cable through the pole base


16

Figure 16 - Running the Cable through the Pole Mount

Once you have routed the cable correctly through the pole mount base and the mounting pole, the mounting assembly should look like the following figures.

Figure 17 - Completed cable run


17

Thread the pole mount base onto the pole mount four to five full turns.

Figure 18 - Threading the Pole-Base onto the mount

Ensure that there’s a gap between the lock nut and washer, and the pole mount base as shown in the following figure. This will allow you to orient the combination of MX575 and pole mount base to the vessel.

Figure 19 – Pole-Base threaded onto mount


18

At this point, fasten the cable to the MX575 connector. Notice that the connector on the receiver enclosure has a key and that the cable-mount connector has a keyway. The key and keyway need to align as you insert the cable-mount connector into the bulkhead connector.

Note – you may have to align the locking ring on the cable-mount connector as you insert it into the bulkhead connector, to ensure that it seats properly.

Once the cable-mount connector has seated fully, rotate the locking ring clockwise until it locks. You will feel the ring ‘click’ when it has locked.

The following two figures show the key, keyway, and the connection when complete.

Figure 20 - Power / Data cable key and keyway


19

Figure 21 - Connected Power / Data cable

The next step is to fasten the MX575 enclosure to the pole mount base using the supplied self-tapping screws. The following figure illustrates this process. There are two alignment keys on top of the base that must fit into two holes of the MX575 enclosure. Once you have aligned the base, use a screwdriver fitted with the supplied Torx T20 bit to fasten the base to the enclosure using the supplied screws. These screws self tap a thread in the blind screw holes of the enclosure. Fasten the screws firmly, but be careful not to strip the thread.

Note: The base is not intended to be removed and re-fastened frequently. Frequent removal of the base from the enclosure may result in failure of the screw hole threads. Stripped threads are not covered under the product warranty.


20

Figure 22 - Fastening the Pole Base to the MX575

The next step is to rotate the hex nut and washer up to the bottom surface of the pole mount base. Do not tighten them at this point as you will need to align the MX575.

Figure 23 - Threading the lock nut against the pole base


21

Orient the MX575 using the gun-sights on the top of the enclosure. Using an adjustable wrench, tighten the lock nut against the MX575 while ensuring accurate alignment of the MX575 system.

Figure 24- Locking the MX575 once aligned

Note: You will need to tighten the locking nut against the pole mount base tightly. To ensure that you don’t over tighten the nut, periodically check to see how secure the MX575 system is, as mounted on the pole. If it’s loose, tighten the lock nut further until you cannot move it.

The top of the MX575 enclosure incorporates a pair of gun-sight design features for assisting the MX575 alignment. The sights will help you to align the enclosure with respect to a point of reference on your vessel.

To use the gun-sights, center the small post on the opposite side of the enclosure from you, pointing towards the direction of forward movement or parallel to the longitudinal axis of the ship as shown in the figures below. Alignment accuracy

when looking through the long site is approximately ± 1°. Using the short site, alignment is approximately accurate to ± 2.5°.


22

Figure 25 - Lining up the alignment sight

Figure 26 - Correctly Lined-up alignment sight


23

If you have another accurate source of heading data on your vessel, such as a gyro compass, you may use its data to correct for a bias in MX575 alignment using the MX CDU configuration. Alternatively, you may wish to physically adjust the heading of the MX575 so that it renders the correct heading measurement, however, adding a software offset (see pgs. 35-40) is an easier process if use with an MX420/2, MX420/8 or MX420/AIS CDU.

2.3 Connecting to a Power Source

The first step to powering the MX575 is to terminate the wires of the power cable as required. There are a variety of power connectors and terminals on the market from which to choose from, depending on your specific requirements.

Caution: Do not apply a voltage higher than 35 VDC as this will damage the receiver and void the warranty.

To interface the MX575 power cable to the power source:

• Connect the red wire (18 gauges) of the cable’s power input to DC (+) • Connect the black wire (18 gauges) of the cable’s power input to DC (-)

The MX575 features reverse polarity protection to prevent damage if the power leads are accidentally reversed. The MX575, however, does not function with reverse polarity.

Once the MX575 system has been installed, you’re ready to turn the system on by applying power to it. The MX575 will start when an acceptable voltage is applied to the power leads. Be careful not to provide a voltage higher than the input range as this will damage the MX575.


24

3. MX575 Operation

The MX575 D/GPS Satellite Compass is powered by connecting the Red (18 gauges) and Black (18 gauges) to an 8 to 36 VDC power source. Once powered, the MX575 will proceed through an internal start-up sequence, however it will be ready to communicate within a few seconds.

Typical time to first fix when the unit is first turned on right out of the box is within 1-2 minutes from startup. The SBAS or beacon lock may take several minutes to acquire from startup.

3.1 MX575 Antenna Cable

The MX575 antenna cable assembly is composed of 7 twisted pairs, only 3 pairs are used to connect to the MX CDU. The thick Red and Black wires (18-Gauge) are Power and Ground. The thinner wires (24-Gauge) are signal wires. Unused wires should be cut and wrapped with electrical tape to prevent accidental contact with other wires. The standard antenna cable supplied with the MX575 is 15 meters long. For longer cable run, a 30-meter cable can be ordered from your dealer.

Please refer to Table 2 for antenna wire color code and pin assignments:


25

Pair Color code Wire Gauge

J1 Pin# Function

Bare 10 RF SHIELDED DRAIN

1 BLK RED

18

18

2 1

Power GRND Power input

2 BLK with BLU stripe BLU

24 24

4 3

RS-232, port A RX RS-232, port A TX

3 GRY 24 12 Signal GRND

4 BLK with GRN stripe GRN

24 24

11 6

RS-422-, port A RS-422+, port A

5 BLK with BRN stripe BRN

24 24

8 7

RS-232, port B RX RS-232, port B TX

6 YEL with BLK stripe YEL

24 24

15 16

RS-422-, port B RS-422+, port B

7 WHT with RED stripe WHT

24 24

14 13

Alarm Alarm

Table 2: Antenna Cable (15M or 30M) wiring

3.2 Standard Data Interface to the CDU

The MX575 is IMO type-approved to provide the primary DGPS positioning information used for navigation as well as True heading and Rate of Turn (ROT) when used as the primary antenna unit to the MX CDU. This is the standard system connection for the MX575 and MX CDU. This is achieved by connecting it to the antenna port (PORT 3) of the MX CDU. The MX CDU will automatically configure the MX575 to output the NMEA data at 19200 baud rate, turn on RAIM feature and heading output to 10 Hz.

Please refer to the following figures 27, 28, 29, 30 31 and for the standard wiring interface to various MX CDU models.


26

(2) Red

TerminalStrip

(User Supplied)

RED(+12 VDC)(16) Red/Wht(1) Blk/Shield BLK(GND)(8) Org

(9) Org/Wht

(10) Yel(11) Yel/Blk

In (A)

In (A)

In (B)

In (B)

Out (A)

Out (A)

Out (B)

Out (B)

(4) Brn(5) Brn/Wht

NMEA2 Tx (RS-232)

Ext. Alarm

(6) Prpl

(7) Prpl/Wht(12) Grn

(13) Grn/Wht(14) Blu

(15) Blu/wht(17) Gry

(18) Blk/Wht

(3) Blk

12~32 VDCSupply

+ -

NM

EA1

I/ONM

EA2

I/O

MX420 CDUYEL/BLK

YEL

BLK/BRN

GRY

MX575A/B

VNDR# 051-0157-002

Figure 27 –Standard connection to MX420 (Port 3) through Cable A


27

RL

1R

L2

RS

232 e

nable

J1

UPPER LOWER Rs232PORT 2

TxRx

GND

MX420/2 JUNCTION BOX

CABLE A

MX ANTENNAPORT

PORT1DUAL CONTROL

EXT. ALARMPOWER FAIL

PWR INPUT

IN +

GND

U1

U2

U7

U4

U9

U5

U6

2 A

MP

B INA IN

B OUTA OUT

BRNORGGRN

BLKRED

GREYPURPLEYEL

WHTBLU

B INA IN

B OUTA OUT

NONCC

NONCC

IN - 12-32 VDC POWER INPUT

1

18

NOTE:F1 - 2 AMP. FUSERL1 - EXTERNAL ALARM RELAY

RL2 - GENERAL POWER FAIL ALARM RELAYJ1 - RS232 ENABLE (PORT2). TO ENABLE THE RS232 ON PORT 2 MOVE THE J1 JUMPER AS SHOWN BY ARROW.

MX420/2

MX575A

BLK (GND)

RED (12 VDC)

YEL

YEL/BLK

BLK/BRN

GRY

VNDR# 051-0157-002

GRN

BLK/GRN

Figure 28– Standard connection to MX420/2 (Port 3) through the junction box


28

Mx575 A/B

F1

RS

-232 E

nable

UPPER LOWER

EXT.ALARM

PORT 8

RL1

RL

2

PORT 7

PORT 10

PORT 9

POWERFAIL ALARM

PORT 6

PORT 5

CABLE A

CABLE B

CABLE C

J1

U1

U3

U2

IN+ IN-

BRNORGGRNBLKRED

GREYPURPLEYELWHTBLU

B INA IN

B OUTA OUT

B OUTA OUT

B INA IN

B INA IN

B INA IN

B OUTA OUT

B OUTA OUT

B OUTA OUT

B INA IN

B INA IN

B OUTA OUT

B OUTA OUT

B OUTA OUT

B INA IN

B INA IN

NCNO C

DIG IN1NCMOBGNDRS232 TX

DIG IN2NOCGNDRS232 RX (PORT2 Rs232)*

U4

U5

U7

U6

U10

U9

U8

U12

U11

U13

U14

U15

MX420/8

1

18

18

18

1

1


RED (+12 VDC)

BLK (GND)

YEL/BLK (PORT B RS-422-)

YEL (PORT B RS-422+)

BLK/BRN (PORT B RX RS-232)

GRY (SIGNAL GND)

MX

42

1

GRN

BLK/GRN

Figure 29–Standard connection to the MX420/8 (Port 3) through

the JB-50 junction box


29

RED RED

BLK BLKBLU GRY

BLK/BRNBRN

ORG YEL

YEL

PRPL

GRY

MX500/MX510/MX512 CDU

Mx575 A/B

GRN YEL/BLK

WHT

P/N 3508 102 7015010-PIN CABLE ASSY.

(3 METERS)

ANT CONN.

VNDR# 051-0157-002

NOT CONNECTED

CONNECTION VIA WIRE SPLICE OR TERMINAL STRIP

GRN

BLK/GRN

Figure 30 – Standard connection to MX500/MX510/MX512 ANT port connection using a 3-meter antenna cable assembly

Mx5xx CDU

MX575A

R ED

BLK

BLK/BR N

YEL

UPPER/LOWER

YEL/BLK

MX500 JUNCTION BOXP/N 500 100 1002

NOTE: DETAILS FOR OTHER COMPONENTS AND TERMINALS IN THE MX 500 JUNCTION BOX ARE NOT SHOWN

AUX

ANT

PWR/DATA

GRYF1

MX

SM

AR

T A

NT

EN

NA

VNDR# 051-0157-002

UPPER/LOWER

BRN GRY

ORG PPL

GRN YEL

BLK WHT

RED BLU

SP

LITT

ER

OP

TIO

NS

EX

TA

LAR

M

+12-24 VDC

(-) GND

GRN

BLK/GRN

Figure 31 – Standard connection to the MX500/MX510 Antenna port through the MX5XX junction box


30

Figure 32 – MX575 connection to the MX512 Antenna port through the MX512 Junction Box


31

3.3 Alternative Data Interface

The MX575 can also be used as a source of true heading & ROT device only when connected to PORT 2 (or any other available ports other than PORT 3) as shown in Figure 32 and 33. The CDU will not change the default NMEA data output configuration of the MX575 in this setup.

RL

1R

L2

RS

23

2 e

na

ble

J1

UPPER LOWER Rs232PORT 2

TxRx

GND


CABLE A

MX ANTENNAPORT

PORT1DUAL CONTROL

EXT. ALARMPOWER FAIL

PWR INPUT

IN +

GND

U1

U2

U7

U4

U9

U5

U6

2 A

MP

B INA IN

B OUTA OUT

BRNORGGRN

BLKRED

GREYPURPLEYEL

WHTBLU

B INA IN

B OUTA OUT

NONCC

NONCC

IN - 12-32 VDC POWER INPUT

1

18

MX420/2

MX575A

BLK (GND)

RED (12 VDC)

YEL/BLK (PORT B RS-232 -)

YEL (PORTB RS-232 +)

BRN (PORT B RX RS-232)

GRY (SIGNAL GND)

VNDR# 051-0157-002

Figure 33 – Alternative connection to MX420/2 CDU (PORT 2) as a GPS Satellite Compass only


32

MX575 A/B

F1

RS

-232 E

nable

UPPER LOWER

POWER

EXT.ALARM

PORT 8

RL

1R

L2

PORT 7

PORT 10

PORT 9

POWERFAIL ALARM

PORT 6

PORT 5

CABLE A

CABLE B

CABLE C

J1

U1

U3

U2

IN+ IN-

BRNORGGRNBLKRED

GREYPURPLEYELWHTBLU

B INA IN

B OUTA OUT

B OUTA OUT

B INA IN

B INA IN

B INA IN

B OUTA OUT

B OUTA OUT

B OUTA OUT

B INA IN

B INA IN

B OUTA OUT

B OUTA OUT

B OUTA OUT

B INA IN

B INA IN

NCNO C

DIG IN1NCMOBGNDRS232 TX

DIG IN2NOCGNDRS232 RX (PORT2 Rs232)*

U4

U5

U7

U6

U10

U9

U8

U12

U11

U13

U14

U15

MX420/8

1

18

18

18

1

1


RED (+12 VDC)

BLK (GND)

YEL/BLK (PORT B RS-422 -)

YEL (PORT B RS-422+)

BLK/BRN (PORT B RS-232 +)

GRY (SIGNAL GND)MX

42

1

PORT 2

PORT 1

Figure 34- MX575 Interface to MX420/8 CDU (PORT 2) as a GPS Satellite Compass only


33

Figure 35 - MX575 Interface to MX5xx CDU (PORT 1) as a GPS Satellite Compass only


34

3.4 Data Interface to PC or Other Navigation Systems

Figure 35 shows the power and data I/O connections of the MX575 compass when using it to supply the position and heading data to a PC charting system using a 9-pin D-connector and terminal strip (these are user supplied items).

12~32 VDCSupply

+ -

BLK/BRN (Port B RX +)

GRY (COMMON GND)

MX575A

BRN (Port B TX +)

5 3 2

9-Pin D-connector(Female)

RED (+12 VDC)

BLK (GND)

TERMINAL STRIP (USER SUPPLIED)

VNDR# 051-0157-002

Figure 36- RS-232 serial interface to PC or other navigation systems


35

4. MX575 Configuration

The MX CDU will automatically configure the navigation functionality of the MX575 when connected to PORT 3 (primary antenna input port) of the CDU. Additionally, it is necessary to configure the MX575 before you can view the True heading and ROT data in the CDU NAV screens.

To configure the MX575 compass functionality, do the following: 1. Press the CFG key to show the CFG1 screen. 2. Scroll down to Compass menu. 3. Press the E key. 4. Scroll down to “Compass connected: No” 5. Press the Change softkey to change the value to Yes. 6. Scroll down to Data Input Port No and press the Change softkey until 3

appears. 7. Scroll to Compass type and change to MX575, 8. Scroll to Heading offset (if any) to enter offset/bias value. You may use the

Gyro readout as reference. 9. Press the E key to exit

The heading value can be seen under Input and Used value. Your setting should look similar to Figure 36 in the following page. To configure Rate of Turn, do the following:

1. Press the CFG key to show the CFG1 screen 2. Press the E key. 3. Scroll down to ROT menu. 4. Press the Change softkey to change the ROT connected to Yes. 5. Scroll down to Data input port no. and press the Change softkley to change

Data input port no. to 3 (or which ever port is connected). 6. Scroll down to Use MX575 ROT and change the value to Yes. 7. After setting all your options, press the E key to exit.

This CFG menu also provides the option called ROT filter time. It controls the averaging time for the Rate of Turn (ROT) display. This helps to smooth the displayed data and NMEA output, a useful tool for slow moving vessels. The default filter setting is 2 seconds.

The Rate of Turn value will be shown under Input and Used value. Your setting should look similar to Figure 37 in the following page.


36

In the MX420 CDU, go to the NAV 5 (Figure 40) and NAV 6 (Figure 41) screens. Here you will have both the Heading and Rate of Turn values displayed. The MX420 CDU can also pass through the HDT and ROT data to any data port selected. Please refer to the MX420 Operator’s Manual (pgs. 115-120).

Figure 36 – Compass Setup with MX420CDU

Figure 37 – ROT Setup with MX420 CDU


37

4.1 Configuring the MX575 as a GPS Satellite Compass

Before beginning on this section, make sure the MX575 D/GPS Satellite Compass is connected to the MX420CDU as shown in Figure 33 to 35. In this manual, we used NMEA 2 I/O (or Port 2). It can also be any available port other than Port 3. Go to the CFG 1 screen in the MX420 CDU, and on the left column, scroll down to Compass.

1. To implement this feature, change Compass connected to Yes. 2. Using the Change softkey, change Data input port no to 2 (or any available

Data input port other than port 3). 3. Change Compass type to MX575, and change Heading offset (if any) to an

offset/bias value corresponding to your MX575. 4. Press the E key to exit, you should be able to see the heading value under

Input and Used value. Your setting should look similar to Figure 37 in the following page.

Go to the CFG 1 screen in the MX420 CDU, and on the left column, scroll down to ROT.

1. To implement this feature, change ROT connected to Yes. 2. Using the Change softkey, change Data input port no to 2 (or any available

Data input port for MX420/8 or MX420/AIS CDU). 3. Change Use MX575 ROT to No. 4. In this menu, the option called ROT filter time is available to control the filter

time for averaging the rate of turn display. It also helps to smooth the measurement on the NMEA output, a particularly useful tool for slow moving vessels and vehicles. The default filter setting is 2 seconds.

5. After setting all the options, press the E key to exit. You should see the Rate of Turn value under Input and Used values. Your setting should look similar to Figure 38 in the following page.

In your MX420 CDU, go to the NAV 5 (Figure 40) and NAV 6 (Figure 41) screens to see the Heading and Rate of Turn display.


38

Figure 38 – Compass Setup with MX420 CDU

Figure 39 – ROT Setup with MX420 CDU


39

4.2 The NAV 5 & NAV 6 Compass Display Screens

Figure 40 – NAV 5 Compass Display Screen

Figure 41 – NAV 6 Compass Display Screen


40

5. MX575 Specifications

The tables below provide the technical specifications of the MX575 D/GPS, communication, beacon sensor, GPS sensor, mechanical, power and

environmental specifications.

Table 3 : Communication specifications

Item Specification

Serial ports 2 full duplex RS-232 and 2 half-duplex RS-422

Baud Rate 4800 to 38400

Correction I/O protocol

RTCM SC-104

Data I/O protocol NMEA 0183

Heading warning I/O Open relay system indicates invalid heading

Table 4 : Beacon receiver specifications

Item Specification

Channels 2-channel, parallel tracking

Frequency 283.5 to 325 kHz

Operating modes Automatic (signal strength or proximity) and manual

Compliance IEC 61108-4 beacon standard

Table 5 : GPS sensor specifications

Item Specification

Receiver type L1, C/A code with carrier phase smoothing

Channels Two 12-channel, parallel tracking (two 10-channel when tracking SBAS)

Update Rate Default at 1 Hz, optional up to 10 Hz on GGA, VTG, ZDA GPHDT – up to 20 Hz.


41

Horizontal accuracy < 2.0 m. RMS (autonomous, no SA)** < 1.0 m RMS (DGPS)* - MX575A < 0.5 m RMS (DGPS)* - MX575B

Heading accuracy < 0.50° RMS

Pitch/roll accuracy < 1° RMS

Rate of turn following rate

90°/s max

Start up time < 60 s typical

Heading fix < 20 s

Satellite reacquisition < 1 s

Compass safe distance

125 cm (49.2 in)

*Note: Depends on multipath environment, number of satellites in view, satellite geometry, baseline length (for local services) and ionospheric activity.

**Note: Depends on multipath environment, number of satellites in view and

satellite geometry.

Table 6 : Mechanical specifications

Item Specification

Enclosure UV resistant, white plastic (AES HW 600G) (Non-corrosive, self extinguishing)

Power/data connector 18-pin, environmentally sealed

Dimensions (not including mounts) 60 cm L x 16 cm W x 18 cm H

(23.6 in L x 6.3 in W x 7.1 in H)

Weight 1.50 kg (3.3 lb)


42

Table 7 : Power specifications

Item Specification

Input voltage 10 to 36 VDC

Power consumption < 5.0 W

Current consumption < 360 mA @ 12 VDC

Isolation Power supply isolated from serial ports

Reverse polarity protection

Yes

Table 8 : Environmental specifications

Item Specification

Storage temperature -40° C to 85° C (-40° F to 185° F) (Dry and damp heat)

Operating temperature

-32° C to 74° C (-25.6° F to 165.2° F) (Dry and damp heat)

Humidity 100% non-condensing

Note: The minimum safe distance measured when the product is placed in the

vicinity of the steering magnetic compass. The ISO 694 defines “vicinity,” relative to the compass as within 5 meter (5.47 yards) separation.


43

Table 9: Type-Approval Compliance

Type MX575A MX575B

Compass and

Navigation

IMO RES. MSC116(73), IMO RES. A.694(17) ISO 22090-3 Ed.4.0, 2002 IMO MSC.112(73) IEC 60945 ED.4.0, 2002 IEC 61162-1 ED.3.0, 2007 IEC 61162-2 ED.1.0, 1998 IEC 61108-1 Ed. 2.0, 2003 IEC 61108-4 Ed. 1.0, 2004

IMO RES. MSC 116(73) IMO RES. 694(17) IMO RES. MSC 191(79) IMO RES. MSC 112(79) ISO 22090-3 ED. 1.0 (C.1, 2005) IEC 60945 ED. 4.0, IEC 61162-1 ED. 3.0, 2007 IEC 61162-2 ED. 1.0, 1998 IEC 62288 Ed. 1.0, 2008 IEC 61108-1 ED. 2.0, 2003 IEC 61108-4 ED. 1.0, 2004


44

6. Data Output

The MX575 data output conforms to the NMEA 0183 V3.0 at 4800, 9600, or 19200 baud. Below is a list of the NMEA sentences output:

NMEA 0183 Data Output Sentences (1) GBS - GNSS Satellite Fault Detection (Modified MX Marine version) This message is used to support Receiver Autonomous Integrity Monitoring (RAIM) feature in the MX420 CDU. A special character flag was added for proper RAIM status determination

$PMVXG,GBS,hhmmss.ss,x.x, x.x,x.x,xx,x.x,x.x,x.x,x*hh<CR><LF> 1 2 3 4 5 6 7 8 9

Notes: 1 ----- UTC time of the GGA or GNS fix associated with this sentence. 2 ----- Expected error in Latitude (meters) 3 ----- Expected error in Longitude (meters) 4 ----- Expected error in Altitude (meters) 5 ----- ID number of most likely failed satellite 6 ----- Probability of missed detection for most likely failed satellite 7 ----- Estimate of bias in meters on most likely failed satellite 8 ----- Standard deviation of bias estimate 9 ----- RAIM status mode; 0=safe, 1=caution, 2=unsafe


45

(2) GGA – Global Positioning System Fix Data Time, position and fix related data for a GPS receiver. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 $GPGGA,hhmmss,llll.llll,a,yyyyy.yyyy,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh<CR><LF> Notes: 1 ----- UTC of position 2,3 --- Latitude, N/S 4,5 --- Longitude, E/W 6 ----- GPS Quality Indicator: 0 = Fix not available or invalid 1 = GPS SPS Mode, fix valid 2 = Differential GPS, SPS Mode, fix valid 3 = GPS PPS Mode, fix valid 7 ----- Number of Satellites in use, 00-12, may be different from the number in view 8 ----- Horizontal Dilution of Precision (HDOP) 9 ----- Antenna altitude/mean-sea-level (geoid) 10 ---- Units of antenna altitude, Meters 11,12- Geoidal Height, Meters 13 ---- Age of Differential GPS Data 14 ---- Differential Reference Station ID (3) GLL – Geographic Position - Latitude/Longitude Latitude and Longitude of vessel position, time of position fix and status. $--GLL,llll.ll,a,yyyyy.yy,a,hhmmss.ss,A,a*hh<CR><LF> 1 2 3 4 5 6 7 Note: 1,2 – Latitude, N/S 3,4 – Longitude, E/W 5------ UTC of position 6 ----- Status A = Data valid V = Data not valid 7 ----- Mode indicator


46

(4) GSA – GPS DOP and Active Satellites GPS receiver operating mode, satellites used in the navigation solution reported by the $GPGGA sentence, and DOP values.

$GPGSA,a,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,x.x,x.x,x.x*hh<CR><LF> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Notes: 1----- Mode: M = Manual, forced to operate in 2D or 3D Mode A = Automatic, allowed to automatically switch 2D/3D

2 ------ Mode: 1 = Fix not available, 2 = 2D, 3 = 3D 3-14 -- PRN numbers of satellites used in solution (null for unused fields) 15 ---- PDOP 16 ---- HDOP 17 -----VDOP

(5) GST - GNSS Pseudorange Error Statistics

This message is used to support Receiver Autonomous Integrity Monitoring (RAIM). Pseudorange measurement error statistics can be translated in the position domain in order to give statistical measures of the quality of the position solution.

If only GPS, GLONASS, etc. is used for the reported position solution, the talker ID is GP, GL, etc., and the error data pertains to the individual system. If satellites from multiple systems are used to obtain the reported position solution, the talker ID is GN and the errors pertain to the combined solution.

$GPGST,hhmmss.ss,x.x,x.x,x.x,x.x,x.x,x.x,x.x*hh<CR><LF> 1 2 3 4 5 6 7 8

Notes: 1 - UTC time of the GGA or GNS fix associated with this sentence. 2 - RMS value of the standard deviation of the range inputs to the

navigation process. Range inputs include preudoranges & DGNSS corrections.

3 - Standard deviation of semi-major axis of error ellipse (meters) 4 - Standard deviation of semi-minor axis of error ellipse (meters) 5 - Orientation of semi-major axis of error ellipse (degrees from true

north) 6 - Standard deviation of latitude error (meters)


47

7 - Standard deviation of longitude error (meters) 8 - Standard deviation of altitude error (meters)

(6) GSV - GPS Satellite in View Number of satellites (SV) in view, PRN numbers, elevation, azimuth and SNR values. Four satellites maximum per transmission, additional satellite data sent in second or third message. Total number of messages being transmitted and the number of the message transmitted are indicated in the first two fields.

$GPGSV,x,x,xx,xx,xx,xxx,xx,....................,xx,xx,xxx,xx*hh<CR><LF> 1 2 3 4 5 6 7 8 9 10 11 12

Notes: 1 ------Total number of messages, 1 to 3

2 ----- Message number, 1 to 3 3 ----- Total number of satellites in view 4 ----- Satellite PRN number 5 ----- Elevation, degrees, 90 degrees maximum 6 ------Azimuth, degrees True, 000 to 359 7 ------SNR (C/No) 00-99 dB, null when not tracking

8 ------2nd and 3rd SV 9,10,11,12 - 4th SV

(7) HDT – Heading, True Actual vessel heading in degrees (True) produced by any device or system producing true heading. $GPHDT,x.x,T*hh<CR><LF> 1 2 Note: 1 – Heading 2 – Degrees True


48

(8) RMC - Recommended Minimum Specific GPS Data Time, date, position, course and speed data provided by a GPS navigation receiver. This sentence is transmitted at intervals not exceeding 2 seconds. All data fields must be provided: null fields used only when data is temporarily unavailable.

$GPRMC,hhmmss.ss,A,llll.llll,a,yyyyy.yyyy,a,x.x,x.x,xxxxxx,x.x,a*hh<CR><LF> 1 2 3 4 5 6 7 8 9 10 11

Notes: 1 ---- UTC of Position fix 2 ---- Status: A = data valid V = Navigation receiver warning 3,4 -- Latitude, N/S 5,6 -- Longitude, E/W 7 ---- Speed over ground, knots 8 ------ Course Over Ground, True 9 ------ Date: dd/mm/yy 10,11 - Magnetic variation, degrees E/W. Easterly variation (E) subtracts from True course, Westerly variation (W) add to True course.

(9) ROT – Rate Of Turn Rate of turn and direction of turn. $GPROT,x.x,A*hh<CR><LF> 1 2 Note: 1 – Rate of turn, degrees/minute, “-“ = bow turns to port

2 – Status (A = Data valid, V = Data invalid) (10) RRE - Range Residuals and Estimated Position E The RRE message contains the satellite range residuals and estimated position error. $GPRRE,n,ii,rr…ii,rr,hhh.h,vvv.v *hh<CR><LF> 1 2 3 4 5 Notes: 1 ---- Number of satellites used in position computation

2,3 - Satellite number, Range residual in meters 4 ---- Horizontal position error estimate in meters 5 ---- Vertical position error estimate in meters


49

(11) VTG - Course Over Ground and Ground Speed

The actual course and speed relative to the ground.

$GPVTG,x.x,T,x.x,M,x.x,N,x.x,K,a*hh<CR><LF> 1 2 3 4 5 6 7 8 9

Notes: 1,2 ------ Course over ground, degrees True 2,3 ------ Course over ground, degrees Magnetic 5,6 ------ Speed over ground, knots 7,8 ------ Speed over ground, km/hr 9 --------- Mode indicator: A = Autonomous mode D = Differential mode E = Estimated (DR) M = Manual input mode S = Simulator mode

N = Data not valid

(12) ZDA - Time and Date UTC, day, month, year and local time zone

$GPZDA,hhmmss,xx,xx,xxxx,xx,xx*hh<CR><LF> 1 2 3 4 5 6

Notes: 1 --- UTC 2, 3, 4 --- Day, month & year 5 --- Local zone hours, 00 to + 13 hrs. 6 --- Local zone in minutes, 00 to +59.


50

(13) PCSI - Beacon Status Message

This message contains a variety of information relating to the status of Beacon engine inside the MX575. The $PCSI,1 output message from the SBX beacon module is intelligently routed through the MX575 to the port from which the $PCSI,1 message was requested.

$PCSI,CS0,PXXX-Y.YYY,SN,fff.f,M,ddd,R,SS,SNR,MTP,Q,ID,H,T

1 2 3 4 5 6 7 8 9 10 1112 1314

Notes: 1 ---- Channel 0

2 ---- Resident SBX-3 firmware version

3 ---- SBX-3 receiver serial number

4 ---- Channel 0 current frequency

5 ---- Frequency Mode (‘A’ - Auto or ‘M’ - Manual)

6 ---- MSK bit rate

7 ---- RTCM rate

8 ---- Signal strength

9 ---- Signal to noise ratio

10 --- Message throughput

11 --- Quality number {0-25} - number of successive good 30 bit

RTCM words received

12 --- Beacon ID to which the receiver’s primary channel is tuned

13 --- Health of the tuned beacon [0-7]

14 --- $PCSI,1 status output period {0-99}


51

6.1 Proprietary Input Data Messages

The table below gives a list of the available proprietary input messages and their description:

Message Type Description

$PMVXG,303 RESET CONTROL

$PMVXG,026 NMEA MESSAGE SCHEDULE

$PMVXG,200 SET PORT CONFIGURATION

$PCSI BEACON PCB CONTROL

$GPMSK,305 BEACON AUTO/MANUAL CONTROL

$JSAVE SAVES ALL CHANGED PARAMETERS

$JDIFF CONTROLS THE DIFFERENTIAL BEACON RECEIVER

$JSHOW SHOWS ALL GPS AND BEACON PARAMETERS


52

Sentence Type - $PMVXG,303

Description: Reset Control

This message allows the user to command various types of resets to the MX575.

Flow: Input

$PMVXG,303 – Reset Control

Field Description Units Format Range

1 Reset Control

Int

0 = No Action

1 = Reset Serial I/O to Factory Default Settings.

2 = Resets GPS Parameters to Factory Default settings, User I/O Settings Remain

3 = Resets GPS Parameters to Factory Default Settings, I/O Settings Return to Factory Defaults.

4 = Reset All Parameters Except the Oscillator Model.

2 NULL

Example:

$PMVXG,303,3*57

$PMVXG,303,4*50


53

Sentence Type - $PMVXG,026

Description: NMEA Message Schedule

This message enables/disables output of the specified sentence to the NMEA port and defines the output rate.

Flow: Input

$PMVXG,026 – NMEA Schedule


1

Equipment Port Output Block

Example “GGA”

Char Default = None

2 Clear Current List Int

0 = NO

1 = YES

Default = None

3 Add/Delete Sentence From List

Int

1 = Append Sentence to Output List

2 = Delete Sentence From Output List

Default = None

4 Sentence Output Rate

Sec Float

>0 = Output Period

-1 = When new Data is Available

5

Position Precision (number of decimal units in position output)

Int 2-6

Default = 2

6 Null

Example:

$PMVXG,026,HDT,0,1,1,,,* $PMVXG,026,ROT,0,1,1,,,* $PMVXG,026,VTG,0,1,5,5,*


54

Sentence Type: $PMVXG,200

Description: Set Port Configuration

This message sets the transmission rate, number of data bits, and parity convention for each of the serial interface ports.

Flow: Input

$PMVXG,200 – PORT CONFIGURATION


1 Serial Port Int 0 = Current Port 1 = Port 1 2 = Port 2 Default:

2 Baud Rate Int 5 = 4800 6 = 9600 7 = 19200 Default:

3 Stop Bits Int 1 = 1 Stop Bit 2 = 2 Stop Bits Default:

4 Pacing Mode Int 0 = None 1 = XON/XOFF 2 = CTS/RTS Default:

5 Parity Int 0 = No Parity 1 = Even Parity 2 = Odd Parity Default:

6 Serial Port Output Format

Int 0 = None 1 = MX LB2 2 = Auxiliary LB2 4 = RTCM Output 10 = Primary NMEA 11 = Auxiliary NMEA Default:

7 Serial Port Input Format

Int 1 = MX LB2 2 = Aux. LB2 4 = RTCM Input 10 = NMEA Input 11 = Aux NMEA Default:

Example:

$PMVXG,200,1,6,,,,10,10*61


55

$PMVXG,200,1,7,,,,,*60


56

Sentence Type: $GPMSK

Description: Beacon tune command

There are three main derivatives of this command that affects the method of beacon receiver tuning, and each are described in the following sections.

Full Manual command ($GPMASK):

This command instructs the MX575’s internal beacon receiver to tune to a specified frequency and MSK Rate.

It has the following form:

$GPMSK,fff.f,M,ddd,M,n<CR><LF>

The internal SBX will reply with the following response:

$PCSI,ACK,GPMSK,fff.f,M,ddd,M,n<CR><LF>

When this message is acknowledged by the internal beacon receiver, it will immediately tune to the frequency specified and demodulate at the rate specified.

Field Description

fff.f Frequency in kHz (283.5 to 325)

M Designates manual frequency selection

ddd MSK bit rate (100 or 200 bps)

M Designates manual MSK bit rate selection

n Period of output of performance status message, 0 to 100 seconds ($CRMSS)

Example: $GPMSK,305,M,,A,,,* $GPMSK,305,,A,,A,,,*


57

Partial Manual Tune Command ($GPMASK):

This command instructs the internal beacon receiver to tune to a specified frequency and automatically select the correct MSK rate.

It has the following form:

$GPMSK,fff.f,M,,A,n<CR><LF

The internal SBX will reply with the following response:

$PCSI,ACK,GPMSK,fff.f,M,,A,n<CR><LF>

When this message is acknowledged by the internal beacon receiver, it will immediately tune to the frequency specified and demodulate at the rate specified.

Field Description

fff.f Frequency in kHz (283.5 to 325)

M Designates manual frequency selection

ddd MSK bit rate (100 or 200 bps)

A Designates Automatic MSK bit rate selection

n Period of output of performance status message, 0 to 100 seconds ($CRMSS)


58

Automatic Beacon Search Command ($GPMSK,305):

This command initiates the beacon receiver to automatic mode of operation in which the receiver operates without operator intervention, selecting the most appropriate beacon station.

This command has the following format:

$GPMSK,305,A,,A,,,<CR><LF>

The internal beacon receiver will reply with the following response:

$PCSI,ACK,GPMSK,,A,,A,n<CR><LF>

Field Description

A1 Automatic Frequency selection Mode

A2 Designates Automatic rate selection

null

The MX575 provides the above response to this variety of $GPMSK message, and immediately tunes to the optimum beacon station in automatic mode, provided a valid beacon almanac is present in receiver memory. Without a valid almanac, the beacon receiver will perform a Global Search to identify candidate stations in the area, followed by the acquisition phase of the initial search.


59

Beacon Database Search Mode ($GPMSK,305):

This operating mode has been added to the MX575 beacon receiver in order to be compliant with the specification IEC 61108-4 for ship borne DGPS maritime radio beacon receiver equipment.

The basic operation is outlined below. 1. The receiver will determine the 10 closest beacon stations after the GPS

receiver has calculated a valid position fix. The list can be accessed using the command $PCSI,3,2*.

2. The primary beacon channel tries to tune to the closest available station, using the frequency and bit rate specified in the station database.

3. The background channel tunes to the frequency of the closest station using an alternate bit rate.

4. The primary channel retunes to the alternate bit rate if lock is achieved on the background channel (with acceptable station health and WER).

5. The background channel continually searches for a closer station using the station database once a lock is achieved on the primary channel.

6. The primary channel will remain tuned to the same station unless one of the following occurs:

• Word error rate (WER) drops below 10% • Station becomes unhealthy or unmonitored • Background channel finds a closer station • Position changes enough to affect station list.

This command has the following format:

$GPMSK,305,D,,D<CR><LF>


60

Sentence Type: $JSHOW

Description: Command to show its current configuration.

This command is used to poll the MX575 receiver for its current configuration.

This command has the following structure.

$JSHOW[,subset] <CR><LF>

Using the $JSHOW command without the optional ‘,subset’ field will provide a complete response from the receiver. An example of this response follows.

$>JSHOW,BAUD,9600 (1) $>JSHOW,BAUD,9600,OTHER (2) $>JSHOW,ASC,GPGGA,1.0,OTHER (3) $>JSHOW,ASC,GPVTG,1.0,OTHER (4) $>JSHOW,ASC,GPGSV,1.0,OTHER (5) $>JSHOW,ASC,GPGST,1.0,OTHER (6) $>JSHOW,ASC,D1,1,OTHER (7) $>JSHOW,DIFF,WAAS (8) $>JSHOW,ALT,NEVER (9) $>JSHOW,LIMIT,10.0 (10) $>JSHOW,MASK,5 (11) $>JSHOW,POS,51.0,-114.0 (12) $>JSHOW,AIR,AUTO,OFF (13) $>JSHOW,FREQ,1575.4200,250 (14) $>JSHOW,AGE,1800 (15)

This example response is summarized in the following table.

Line Description

1 This line indicates that the current port is set to a baud rate of 9600

2 This line indicates that the other port is set to a baud rate of 9600

3 This line indicates that GPGGA is output at a rate of 1 Hz from the other port

4 This line indicates that GPVTG is output at a rate of 1 Hz from the other port

5 This line indicates that the GPGSV is output at a rate of 1 Hz from the other port

6 This line indicates that GPGST is output at a rate of 1 Hz from the other port

7 This line indicates that D1 is output at a rate of 1 Hz from the other port

8 This line indicates that the current differential mode is WAAS


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9 This line indicates the status of the altitude aiding feature

10 This line indicates the threshold of estimated differential performance that allows the green DGPS LED to illuminate (on the Mini MAX only)

11 This line indicates the current elevation mask cutoff angle, in degrees

12 This line indicates the current seed position used for startup, in decimal degrees

13 This line indicates the current status of the AIR mode

14 This line indicates the current frequency of the L-band receiver

15 This line indicates the current maximum acceptable differential age in seconds

When issuing this command with the optional ‘,subset’ data field (without the square brackets), a one-line response is provided. The subset field may be either CONF or GP.

When CONF is specified for ‘subset’, the following response is provided.

$>JSHOW,CONF,N,0.0,10.0,5,A,60W

This response is summarized in the following table.

Message Component

Description

$>JSHOW,CONF Message header

N N ‘N’ indicates no altitude aiding

0.0 ‘0.0’ indicates the aiding value, if specified (either specified height or PDOP threshold)

10.0 Residual limit for the $JLIMIT command

5 Elevation mask cutoff angle, in degrees

A AIR mode indication

60 Maximum acceptable age of correction data in seconds


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W Current differential mode, ‘W’ indicates WAAS mode.

When GP is specified for ‘subset’, the following is an example response provided:

$>JSHOW,GP,GGA,1.0

This response will provide the >$JSHOW,GP message header, followed by each message currently being output through the current port and also the update rate for that message.


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Sentence type: $JDIFF Description: Beacon receiver differential mode This command is used to change the differential mode of the receiver. The default differential mode is Auto/Database.


$JDIFF,diff<CR><LF>

Where the differential mode variable, ‘diff’, has one of the following values:

$JDIFF,diff<CR><LF>

Values Description

OTHER Specifying OTHER instructs the receiver to use external corrections input through the opposite port from which you are communicating

BEACON Specifying BEACON instructs the receiver to use corrections from the internal SBX beacon engine

WAAS Specifying WAAS instructs the receiver to use SBAS corrections

LBAND Specifying LBAND instructs the receiver to use OmniSTAR corrections.

AUTODIFF Specifying AUTODIFF instructs the receiver to use e Dif mode

NONE In order for the receiver to operate in autonomous mode, the NONE argument may be specified in this command.

Example:

$JDIFF,BEACON*

$JDIFF,LBAND*

$JDIFF,WAAS*


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Sentence Type: $JSAVE

Sending this command is required after making changes to the operating mode of the receiver in order to ensure the changes are saved for the subsequent power cycle.


$JSAVE<CR><LF>

The receiver will reply with the following two messages. Ensure that the receiver indicates that the save process is complete before turning the receiver off or changing the configuration further.

$> Saving Configuration. Please Wait...

$> Save Complete

No data fields are required. The receiver will indicate that the configuration is being saved and will notify you when the save is complete.


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PRODUCT WARRANTY AND LIMITATION OF LIABILITY

This product is warranted by NAVICO (the “Seller”) to original purchaser (the “buyer”) for use only to be free of all defects in material and workmanship for a period of twelve (12) months from date of purchase by Buyer. If during the warranty period, this product or parts thereof (“Product”) are found to be defective in material or workmanship, Seller shall repair or replace the defective Product, at the discretion of the Seller. In order to claim this warranty service, Buyer shall return the defective Product, together with proof of purchase to Seller or its authorized service representative and pay all transportation charges, duties, and taxes associated with the return of the Product to Seller. Seller shall reimburse Buyer for costs of the return to Buyer of Product found to be defective and covered by this warranty. Product which is repaired or replaced under the warranty is covered by this warranty for the remainder of the original warranty period or for a period of ninety (90) days after return shipment to Buyer, whichever is longer. SELLER’S MAXIMUM LIABILITY ARISING FROM USE OF SELLER’S PRODUCT SHALL NOT EXCEED AND BUYER’S REMEDY IS LIMITED IN ANY EVENT TO REPAIR OR REPLACEMENT AND REIMBURSEMENT FOR COSTS ASSOCIATED WITH THE RETURN OF THE DEFECTIVE PRODUCT AS PROVIDED HEREIN; AND SUCH REMEDY SHALL BE THE BUYER’S ENTIRE AND EXCLUSIVE REMEDY. This warranty does not apply to failure of any equipment not sold to Buyer by Seller, or to any Product which has been subjected to misuse, lightning, an accident, or improper installation, maintenance or application, nor does it extend to any Product which has been repaired or altered by anybody other than the Seller or its authorized service representative, unless such repair or alteration was authorized in writing by Seller. This warranty also does not apply to batteries and losses or damage due to the batteries. Since the GPS system on which the Product operates is furnished by the U.S.. Government, not Seller, the Seller shall not be responsible for the GPS system or changes in the GPS System availability, coverage or accuracy.


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THIS PRINTED LIMITED WARRANTY IS ACCEPTED BY BUYER IN LIEU OF ANY OTHER WARRANTY FOR THE PRODUCT, WHETHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SELLER BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND OR NATURE, INCLUDING, BUT NOT LIMITED TO LOSS OF PROFIT OR REVENUE, COMMERCIAL LOSS, DAMAGE TO OR LOSS OF PROPERTY, ARISING FROM OR RELATED TO THE USE OF THE PRODUCT. THIS PRODUCT IS AN AID TO NAVIGATION ONLY. UNDER NO CIRCUMSTANCES SHOULD IT BE USED IN LIEU OF AUTHORIZED GOVERNMENT CHARTS. ITS ACCURACY CAN BE AFFECTED BY MANY FACTORS SUCH AS EQUIPMENT.

Master the Elements

Doc. no. 3508-102-70920

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MX575A MX575B D/GPS Compass Installation Manual · DGPS correction data ... compensate for orientation errors. ... manual). For example, if a gyro compass heading provides 183.2°