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JMC NT–2000 Operation & Installation

Dual channel navtex receiver
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NT–2000 REF Manual
UM-NT2000-07
First Edition
October, 2005
Operation & Installation
MODEL
for
NT
2000
DEBEG 2902
–
/
Dual Channel
NAVTEX Receiver
(Receive r Unit: PROTECTED EQUIPMENT UNDER IEC 6 094 5–20 02 )
(Antenna Unit: EXPOSED EQUIPMENT UNDER IEC 6 094 5–2 002 )
Valid for Software Version 1.2
sales@ japan–mar ina.co.jp
www.japan–mar i na.co.jp

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  • Page 1 NT–2000 REF Manual UM-NT2000-07 First Edition October, 2005 Operation & Installation MODEL 2000 DEBEG 2902 – Dual Channel NAVTEX Receiver (Receive r Unit: PROTECTED EQUIPMENT UNDER IEC 6 094 5–20 02 ) (Antenna Unit: EXPOSED EQUIPMENT UNDER IEC 6 094 5–2 002 ) Valid for Software Version 1.2 sales@ japan–mar ina.co.jp www.japan–mar i na.co.jp...
  • Page 2 DEBEG 2902 Copyright In this manual the NAVTEX Receiver DEBEG 2902 is referred to as NT–2000. This document is manufacturer´s property for which all rights reserved, including those relating to patents or registered designs. It must not be reproduced or used otherwise or made available to any third party without our prior permission in writing.
  • Page 3 Please contact your dealer for details. Before returning the units to JMC for warranty service, please obtain JMC’s return authorization. When shipping the units to JMC or its dealers for service, please be sure to include the following types of information: ･ Serial number ･...
  • Page 4 NT–2000 REF Manual WARNINGS AND CAUTIONS < WARNINGS > 1. HIGH VOLTAGES HIGH VOLTAGES EXIST INSIDE THE EQUIPMENT CABINET. BE SURE TO SWITCH THE EQUIPMENT OFF AND UNPLUG THE POWER CORD BEFORE OPENING THE CABINET FOR INSPECTION OR REPAIRS. 2. INSTALLATION & OPERATING ENVIRONMENT THE DISPLAY CABINET IS IN THE “PROTECTED”...
  • Page 5 NT–2000 REF Manual WARNINGS AND CAUTIONS < CAUTIONS > 1: Operational – Memory Retention Period Do not leave the equipment switched off for more than 10 days continuously, or all stored messages will be erased, whether they are protected or not. Important messages you wish to preserve should be out put to an optional printer or to a PC via the appropriate rear panel interface connector if the equipment is to be kept turned off for...

  • Page 6: Table Of Contents

    NT–2000 REF Manual Index Typical NAVTEX Message Screen............. 1-1 1.1. Introduction......................1-1 1.2. Indication of Reception and Storage of New NAVTEX Message......1-5 Control Panel Functions ................. 2-1 Basic Operating Procedure............... 3-1 3.1. Introduction......................3-1 3.2. Turning the Equipment On /Off.................3-1 3.3. Adjusting Screen Brightness ................3-2 3.4.
  • Page 7 NT–2000 REF Manual Index 4.10.4. Outputting NAVTEX Messages of Specific Receiver ....4-14 4.10.5. Outputting NAVTEX Messages of Specific Station.......4-15 4.10.6. Outputting NAVTEX Messages of Specific Message Type...4-16 4.10.7. Outputting All Displayed NAVTEX Messages .......4-17 4.10.8. Outputting Specific NAVTEX Message...........4-18 4.11. Setting Output Ports ..................4-19 4 .
  • Page 8 NT–2000 REF Manual Index Installatio n .................... 7-1 7.1. Receiver Cabinet Installation................7-1 7.1.1. General Precautions ................7-1 7.1.2. Mounting the Receiver Cabinet..............7-1 7.2. Antenna Installation..................7-3 7.2.1. Installation Site Requirements ..............7-3 7.2.2. Precautions for Cabling ................7-3 7.3. Electrical Connections ..................7-5 7.3.1. Introduction ....................7-5 7.3.2.

  • Page 9: Typical Navtex Message Screen

    NT–2000 REF Manual Typical NAVTEX Message Screen Typical NAVTEX Message Screen 1.1. Introduction The illustration below represents a typical NAVTEX message screen, showing a new message received on the first ( 518 kHz) receiver. A similar screen will show up when the equipment is switched to receive a second receiver (490 kHz or 4209.5 kHz) message.

  • Page 10: Introduction

    NT–2000 REF Manual Typical NAVTEX Message Screen Typical NAVTEX Message Screen ( continued – 2 / 5 1.1. Introduction ( continued – 2 / 4 Receiver perating Status Indication ④ The current status of receiver operation is indicated here. ・ STANDBY : Receiver is waiting for a NAVTEX message transmission.
  • Page 11 NT–2000 REF Manual Typical NAVTEX Message Screen Typical NAVTEX Message Screen ( continued – 3 / 5 1.1. Introduction ( continued – 3 / 4 Alarm Tag IIALARM ⑦ This tag represents a visual alarm and is turned on when a NAVTEX message of one of the following types has been received.
  • Page 12 NT–2000 REF Manual Typical NAVTEX Message Screen Typical NAVTEX Message Screen ( continued – 4 / 5 1.1. Introduction ( continued – 4 / 4 End–of–Message Indication NNNN ⑩ The appearance of these four successive N characters indicates the end of the currently displayed NAVTEX message.

  • Page 13: Indication Of Reception And Storage Of New Navtex Message

    NT–2000 REF Manual Typical NAVTEX Message Screen Typical NAVTEX Message Screen ( continued – 5 / 5 1.2. Indication of Reception and Storage of New NAVTEX Message Indicating Reception of New Message – First Receiver ● The equipment visually indicates the reception of a new NAVTEX message by attaching a tag ) to the message ID, as in the example below.

  • Page 14: Control Panel Functions

    NT–2000 REF Manual Control Panel Functions Control Panel Functions The figure below shows the control panel of the equipment. A summary description of the functions the keys provides is given below and in the following pages. Figure 2-1 Control Panel ①...
  • Page 15 NT–2000 REF Manual Control Panel Functions Control Panel Functions ( continued – 2 / 1 0  Power Key – 2 / 2 ② After the unit is switched on, the opening message window will be replaced with another window listing the current settings of receiver control parameters, as in the example below.
  • Page 16 NT–2000 REF Manual Control Panel Functions Control Panel Functions ( continued – 3 / 1 0  Screen Page Key ⑤ Pressing this key switches the message screen between the first receiver screen page and the second receiver screen page. For example, if the current screen is currently showing the first receiver page ( i.e.
  • Page 17 NT–2000 REF Manual Control Panel Functions Control Panel Functions ( continued – 4 / 1 0  Enter Key ⑨ ･ When a NAVTEX message is currently being displayed, pressing this key displays the newest message ( e.g. 200/200). ･ When a menu is currently being displayed, pressing this key: - completes the selection of a desired option, - executes the function selected or, - finalizes the current setting.
  • Page 18 NT–2000 REF Manual Control Panel Functions 2. Control Panel Functions ( continued – 5 / 1 0  Selection/Station Key – ⑪ 2 / 2 ･ When option “ 5:MAKE SEL / REJ SETTING ” on the SYSTEM MENU is currently accessed for selection/rejection settings, this key selects the station or message type you specify for reception.
  • Page 19 NT–2000 REF Manual Control Panel Functions Control Panel Functions ( continued – 6 / 1 0  New Message Key ⑬ When a new NAVTEX message has been received, a NEW MESSAGE tag is attached to the message ID as in the example below to indicate that the message is new.
  • Page 20 NT–2000 REF Manual Control Panel Functions Control Panel Functions ( continued – 7 / 1 0  Message/Station Rejection Key – ⑭ 1 / 2 ･ When a NAVTEX message text is currently being displayed, pressing this key displays a summary list of the transmitter IDs and message types rejected ( deselected) via the menu system on both the first and second receivers, as in the example below.
  • Page 21 NT–2000 REF Manual Control Panel Functions 2. Control Panel Functions ( continued – 8 / 1 0  Message/Station Rejection Key – ⑭ 2 / 2 ･ When option “ 5:MAKE SEL / REJ SETTING ” on the SYSTEM MENU is currently accessed for selection/rejection settings, this key rejects the station or message type you specify.
  • Page 22 NT–2000 REF Manual Control Panel Functions Control Panel Functions ( continued – 9 / 1 0  Menu Key ⑮ ･ Pressing this key opens a menu termed “SYSTEM MENU,” as shown below, to customize the operation to suit your specific needs by making various settings, to test the receiver performance off–line, or reset the entire system to the initial settings.
  • Page 23 NT-2000 REF Manual Control Panel Functions 2. Control Panel Functions ( continued – 1 0 / 1 0  Store Message Key ⑯ ･ This key is used to place a specific NAVTEX message in permanent storage, thereby protecting it from being erased from memory automatically after the maximum message storage limit ( 200 messages) is reached.

  • Page 24: Basic Operating Procedure

    NT–2000 REF Manual Basic Operating Procedure Basic Operating Procedure 3.1. Introduction This section describes the basic operating procedure, allowing you to operate your NAVTEX receiver from the front keypad without prior knowledge of the NAVTEX system. The functions that are available from the keypad are summarized in section 2 (Control Panel Functions).

  • Page 25: Adjusting Screen Brightness

    NT–2000 REF Manual Basic Operating Procedure Basic Operating Procedure – 2 / 7 3.3. Adjusting Screen Brightness ･ The screen brightness level can be changed in a total of eight steps to suit the  ambient lighting condition by repeatedly pressing ･...

  • Page 26: Scrolling Navtex Messages

    NT–2000 REF Manual Basic Operating Procedure Basic Operating Procedure – 3 / 7 3.6. Scrolling NAVTEX Messages The displayed NAVTEX text can be scrolled line by line or down or message by message with the use of the following pairs of keys: ...

  • Page 27: Stopping Audible And Visual Alarm

    NT–2000 REF Manual Basic Operating Procedure Basic Operating Procedure – 4 / 7 3.7. Stopping Audible and Visual Alarm Your equipment will warn you audibly and visually against reception of a vital NAVTEX message ( type–D message ), such as SAR information, piracy, or armed robbery warning. An example type–D alarm message is given below, showing the visual alarm called the alarm tag attached to the message ID.

  • Page 28: Protecting Messages For Permanent Storage

    NT–2000 REF Manual Basic Operating Procedure Basic Operating Procedure – 5 / 7 3.8. Protecting Messages for Permanent Storage 3.8.1. Introduction Initially, all stored NAVTEX messages will be automatically erased one by one from memory on a first–in–first–out basis as the equipment continues receiving new messages after the message storage capacity limit ( 200 messages) is reached.

  • Page 29: Removing Protection Tag

    NT–2000 REF Manual Basic Operating Procedure Basic Operating Procedure – 7 / 7 3.8.3. Removing Protection Tag The protection tag on a specific message can be removed via the following steps:     (1) Using and/or , display the message from which you wish to remove the tag.

  • Page 30: Customizing Operation Via Menu System

    NT–2000 REF Manual Customizing Operation via Menu System Customizing Operation via Menu System 4.1. Introduction The equipment should work normally with the initial factory settings. Some of the settings, such as keypress beep on/off, screen background color, rejection of certain transmitters or message types and alarm on/off, however, may be changed to suit your specific operating needs via the menu system.

  • Page 31: Selecting Screen Background Colors

    NT–2000 REF Manual Customizing Operation via Menu System 4.3. Selecting Screen Background Colors Figure 4-3 Selecting Screen Background Colors Three different colors (white, S Y S T E M M E N U black and blue) are selectable 1: MAKE DISPLAY SETTINGS for the text screen background.

  • Page 32: Turning On/Off Screen Sleep Mode

    NT–2000 REF Manual Customizing Operation via Menu System 4.5. Turning on/off Screen Sleep Mode 4.5.1. Introduction Figure 4-5 Turning Screen Sleep Mode on The screen brightness initially remains at the level set by S Y S T E M M E N U ...

  • Page 33: Setting Times To Reduced Brightness Levels

    NT–2000 REF Manual Customizing Operation via Menu System 4.5.3. Setting Times to Reduced Brightness Levels Figure 4-6 Setting Times to Reduced Brightness Levels If you wish to set the times to 2:TURN ON/OFF SLEEP MODE the reduced brightness levels, follow the steps given below. 1: OFF 2:TURN ON/OFF SLEEP MODE (1) Select option “...

  • Page 34: Turning On/Off Keypress Beep

    NT–2000 REF Manual Customizing Operation via Menu System 4.7. Turning on/off Ke ypress Beep Figure 4-8 Turning on / off Keypress Beep Pressing a front panel key S Y S T E M M E N U causes the equipment to beep, 1: MAKE DISPLAY SETTINGS indicating proper actuation SELECT 2ND RECEIVER FREQUENCIES...

  • Page 35: Selecting And Rejecting Transmitters And Message Types

    NT–2000 REF Manual Customizing Operation via Menu System 4.8. Selecting and Rejecting Transmitters and Message Types 4.8.1. Selecting and Rejecting Transmitters Initially all NAVTEX transmitters are selected so that the equipment will automatically receive NAVTEX messages from every station on the air within the coverage area. The following procedure allows you to reject transmissions from stations that are not of concern to your navigational needs or that you do not wish to receive for some reason.
  • Page 36 NT–2000 REF Manual Customizing Operation via Menu System 4.8.1. Selecting and Rejecting Transmitters – 2 / 2 Figure 4-11 Rejecting Transmitters – Step 2 (3) Highlight option “ ,” 1: SYNCHRONIZE BOTH RECEIVERS 1:STATIONS  press STATIONSI 2: MESSAGES 1:STATIONS A list of all stations and their current A:SELECTED...

  • Page 37: Selecting And Rejecting Message Types

    NT–2000 REF Manual Customizing Operation via Menu System 4.8.2. Selecting and Rejecting Message Types Initially the following NAVTEX message types are rejected, making it impossible for the equipment to receive any messages of those types under the initial factory settings: Figure 4-13 Initially Rejected Message Types G I M N O P Q R S T U W X Y The following procedure allows you to reject certain message types that are not of...
  • Page 38 NT–2000 REF Manual Customizing Operation via Menu System 4.8.2. Selecting and Rejecting Message Types – 2 / 2 (3) – 2 / 2 The status of a rejected message type is indicated in red. Types A, B, D and L , however, cannot be rejected due to the relevant IMO resolutions and IEC specifications.

  • Page 39: Searching Memory For Stored Messages

    NT–2000 REF Manual Customizing Operation via Menu System 4.9. Searching Memor y f or Stored Messages NAVTEX messages stored in non–volatile memory are searchable by station and / or message type via the following steps.   (1) Highlight option “ 5: SEARCH STORED MESSAGES ” by pressing ...

  • Page 40: Selecting Output Messages

    NT–2000 REF Manual Customizing Operation via Menu System 4.10. Selecting Output Messages 4.10.1. Introduction The NAVTEX message that is currently being received or previously received messages stored in memory can be output to external devices ( e.g., a printer, an INS/IBS device) via the rear panel interface connectors ( I / O p o r t s , i .

  • Page 41: Outputting Live Navtex Messages

    NT-2000 REF Manual Customizing Operation via Menu System 4.10.2. Outputting Live NAVTEX Messages This output mode is to be activated when an optional printer is plugged in for realtime, on–line message printing or when a live NAVTEX output is required for other onboard applications.

  • Page 42: Outputting All Stored Messages

    NT-2000 REF Manual Customizing Operation via Menu System 4.10.3. Outputting All Stored Messages To output all the messages stored in memory, follow the steps given below. NOTE: A forced carriage return (  ) will be replaced by an underscore ( _ ) ( hex 5F ) when it is output to a PC terminal or a printer .

  • Page 43: Outputting Navtex Messages Of Specific Receiver

    NT-2000 REF Manual Customizing Operation via Menu System 4.10.4. Outputting NAVTEX Messages of Specific Receiver If you wish to output all NAVTEX messages received from either receiver ( first or second receiver) alone, carry out the following step–by–step procedure: NOTE: A forced carriage return (  ) will be replaced by an underscore ( _ ) ( hex 5F ) when it is output to a PC terminal or a printer .

  • Page 44: Outputting Navtex Messages Of Specific Station

    NT-2000 REF Manual Customizing Operation via Menu System 4.10.5. Outputting NAVTEX Messages of Specific Station If you wish to output all messages received from a specific NAVTEX transmitting station, carry out the following step–by–step procedure: NOTE: A forced carriage return (  ) will be replaced by an underscore ( _ ) ( hex 5F ) when it is output to a PC terminal or a printer .

  • Page 45: Outputting Navtex Messages Of Specific Message Type

    NT-2000 REF Manual Customizing Operation via Menu System 4.10.6. Outputting NAVTEX Messages of Specific Message Type If you wish to output all messages of a specific message type, carry out the following step–by–step instructions: NOTE: A forced carriage return (  ) will be replaced by an underscore ( _ ) ( hex 5F ) when it is output to a PC terminal or a printer .

  • Page 46: Outputting All Displayed Navtex Messages

    NT-2000 REF Manual Customizing Operation via Menu System 4.10.7. Outputting All Displayed NAVTEX Messages If you wish to output all messages currently displayed, follow the steps given below. NOTE: A forced carriage return (  ) will be replaced by an underscore ( _ ) ( hex 5F ) when it is output to a PC terminal or a printer .

  • Page 47: Outputting Specific Navtex Message

    NT-2000 REF Manual Customizing Operation via Menu System 4.10.8. Outputting Specific NAVTEX Message If you wish to output a specific message out of all currently displayed messages, carry out the following procedure: NOTE: A forced carriage return (  ) will be replaced by an underscore ( _ ) ( hex 5F ) when it is output to a PC terminal or a printer .

  • Page 48: Setting Output Ports

    NT-2000 REF Manual Customizing Operation via Menu System 4.11. Setting Output Ports 4 . 1 1 . 1 . I n t r o d u c t i o n In order for external devices ( e.g. printer, IBS/INS component) to receive live or stored NAVTEX messages properly through the desired rear panel I/O connectors ( RS–232C, RS–422 or I/O DATA port ), it is necessary to set the following parameters to the port selected.
  • Page 49 NT-2000 REF Manual Customizing Operation via Menu System 4.11.2.2. RS–422 Port The RS– 432 port, designed as an interface with an IBS/INS system, is also initially enabled so that the NAVTEX messages selected in paragraphs 4.10.2 through 4.10.7 will be output via this port. If, for any reason, you wish to disable it, follow the steps given below.

  • Page 50: Se Lecting Communications Protocols

    NT-2000 REF Manual Customizing Operation via Menu System 4.11.3. Selecting Comm unications Protocols The following communications protocols are initially assigned to the three output ports described in paragraph 4.10.1. ･ IEC 61162–1 ( NMEA–0183 Ver. 2.0 & greater ): RS–422 Port ･...

  • Page 51: Selecting Bit Formats And Data Transfer Rates

    NT-2000 REF Manual Customizing Operation via Menu System 4.11.4. Selecting Bit Formats and Data Transfer Rates 4.11.4.1. Introduction The following instructions allow you to select the correct bit format ( number of data bits, stop bits, parity bit status) and bit rate ( baud rate: 110, 4800, 9600 etc.) that are required by the application using each I/O port for correct data transfer.
  • Page 52 NT-2000 REF Manual Customizing Operation via Menu System Selecting Parameters for RS–232C Port ( continued – 2 / 2 4.11.4.2.   (1) Press to highlight the desired parameter. For example, to change the parity bit status to non–parity, highlight “ 3:PARITY.” ...
  • Page 53 NT-2000 REF Manual Customizing Operation via Menu System 4.11.4.4. Selecting Parameters for I / O DATA Port The parameters for the I/O DATA port are initially set as follows: ･ Data Bits: 8 bits ･ Stop Bits: 1 bit ･ Parity: Odd parity ･...

  • Page 54: Performing Sel F -Diagnostic Tests

    NT-2000 REF Manual Customizing Operation via Menu System 4.12. Performing Sel f –Diagnostic Tests Figure 4-37 Starting Self–Diagnostic Test 4.12.1. Introduction S Y S T E M M E N U Selecting option “ 8: START 1: MAKE DISPLAY SETTINGS SELF–DIAGNOSTIC TESTS ”...

  • Page 55: Checking Test Results

    NT-2000 REF Manual Customizing Operation via Menu System 4.12.3. Checking Test Results Figure 4-38 Results of Self–Diagnostic Test – Example function will 8: START SELF–DIAGNOSTIC TESTS terminated automatically just SELF–DIAGNOSTIC TEST REPORT after completion of the keypad dimmer lamp test ( TESTING 1: TESTING RECEIVERS KEYPAD LAMPS on the test RCVR((518KHZ)((518KH...

  • Page 56: Turning On/Off Message Alarms

    NT-2000 REF Manual Customizing Operation via Menu System 4.13. Turning on/off Message Alarms The alarm function for types A, B and L messages is initially disabled unless it was set otherwise by your dealer. If you wish to enable some or all of the message alarms, follow the steps given below.

  • Page 57: Reset Ting The System

    NT-2000 REF Manual Customizing Operation via Menu System 4.14. Reset ting the S yste m If, for any reason, you wish to reset the system to return all current operational settings to the initial factory settings, follow the steps given below. Initialization of the settings does not affect the message storage;...

  • Page 58: User-Level Troubleshooting

    NT-2000 REF Manual User-Level Troubleshooting User–Level Troubleshooting A list of common troubles the user may experience while operating the equipment is given below along with recommended remedies for such troubles. If a problem persists, contact your dealer for assistance, giving as much information as possible about the symptom, self–diagnostic tests results ( paragraph 4.12 ), power supply voltage, antenna configuration, operating frequency, control and menu settings used, serial number of, software version (VER.) and revision (REV.) numbers of, your equipment.

  • Page 59: No Message Reception

    NT-2000 REF Manual User-Level Troubleshooting 5.2. No Message Reception The following description of the symptoms assumes that NAVTEX messages were properly received for some time after initial installation. Symptom Suggested Solution 1. Check the message rejection settings by messages received ...
  • Page 60 NT-2000 REF Manual User-Level Troubleshooting No Message Reception – 2 / 3 5.2. Symptom Suggested Solution 1. Check if you are located within the service area covered by the ground wave of the desired station. The area is normally 200 to 400 nautical miles from each station No messages can be received in the during daytime hours.

  • Page 61: Message Storage Problems

    NT-2000 REF Manual User-Level Troubleshooting No Message Reception – 3 / 3 5.2. Symptom Suggested Solution The symptom is an indication that the antenna circuit has become defective. 1. If the active antenna is used, replace it with one known to be good. No messages can be received at any 2.

  • Page 62: Poor Reception

    NT-2000 REF Manual User-Level Troubleshooting 5.4. Poor Reception The following description of the symptoms assumes that NAVTEX messages were properly received for some time after initial installation time, and all message types and transmitter IDs you wish to receive are selected (via the steps given in paragraph 4.8). Symptom Suggested Solution 1.

  • Page 63: Blank Message Screen

    NT-2000 REF Manual User-Level Troubleshooting 5.5. Blank Message Screen The following description of the symptom assumes that your NAVTEX receiver was properly working for some time after initial installation time. Symptom Suggested Solution 1. Check to be sure that the power source voltage is within the 11–36V range.

  • Page 64: No Response From Keypress

    NT-2000 REF Manual User-Level Troubleshooting 5.8. No Response from Ke ypress The following description of the symptom assumes that your NAVTEX receiver was properly working for some time after initial installation time. Symptom Suggested Solution 1. Check to be sure that the power source voltage is within the 11–36V range.

  • Page 65: No Message Alarm Output

    NT-2000 REF Manual User-Level Troubleshooting 5.10. No Message Alarm Output The following description of the symptom assumes that your NAVTEX receiver was properly working for some time after initial installation time. Symptom Suggested Solution 1. The alarm function for type–A and type–B messages are initially disabled.

  • Page 66: External Control Problem

    NT-2000 REF Manual User-Level Troubleshooting 5.12. External Control Problem The following description of the symptom assumes that your NAVTEX receiver was properly working for some time after initial installation time. Symptom Suggested Solution 1. Check to be sure that the RS–422 port is enabled ( set to ON ).

  • Page 67: User-Level Maintenance Instructions

    NT-2000 REF Manual User-Level Maintenance User–Level Maintenance Instructions To ensure long–term trouble–free operation, the user should regularly follow the maintenance instructions described in this section. 6.1. Maintenance on the Equipment Cabinet Keep the equipment, away from sea splashes, direct sunlight and other heat–generating sources, and make sure that air around the cabinet is circulating freely.

  • Page 68: Maintenance On The Active Antenna Unit

    NT-2000 REF Manual User-Level Maintenance 6.3. Maintenance on The Active Antenna Unit The ANT–2000 active antenna or an optional active antenna unit ( e . g . ANT– 900 , a l l consisting of a 1.2m fiberglass whip, a preamplifier housing and coaxial cabling), requires maintenance at least once every six months: 1.
  • Page 69 NT-2000 REF Manual User-Level Maintenance 6.5. Recommended Spare Parts A list of the spare parts recommended for the maintenance and servicing for three to five years is given below. Replacing parts, except for the active antenna unit, should be done by your dealer or a qualified service engineer. The user should not open the receiver cabinet for inspection or replacing suspected parts.

  • Page 70: Installation

    NT-2000 REF Manual Installation Installation 7.1. Receiver Cabinet Installation 7.1.1. General Precautions The receiver cabinet is constructed to withstand the humid and corrosive marine environment, but is designed to be installed or operated inside the wheelhouse or chartroom. The cabinet is a “protected” category product under IEC 60945–2002, and is not waterproof.
  • Page 71 NT-2000 REF Manual Installation – 7.1.2. Mounting the Display Cabinet ( continued 2 / 2 Figure 7-1 Table–Top Mounting – Example Be sure to attach a serrated plastic washer to the inside of each arm before placing the cabinet in the bracket. This pair of washers is supplied separately in the plastic bag that contains the power cable, fuses, plugs, etc., and prevents the cabinet from leaning...

  • Page 72: Antenna Installation

    NT-2000 REF Manual Installation 7.2. Antenna Installation The dimensions of the active antenna (ANT–2000) is given in Figure 7–3. The same dimensions apply to the optional active antennas (ANT–900 and ANT–2002). If a long wire is to be used permanently, it should be insulated and at least five meters long. 7.2.1.
  • Page 73 The preamplifier housing may be secured to a suitable pole of less than 9 centimeters in diameter, using a set of appropriate mounting hardware ( e.g. stainless steel hose clamps and bands ). Whip Preamplifier Housing Not Supplied from JMC PL259 PL258 RG-214 / 7D-2V RG-58U (3D-2V)

  • Page 74: Electrical Connections

    NT-2000 REF Manual Installation 7.3. Electrical Connections 7.3.1. Introduction All electrical connections to the equipment are to be made via the connector receptacles and terminal installed on the rear panel and the rear apron. The figure below shows the rear view of the equipment. Overall connections are illustrated in Figure 7–5. A summary description of the necessary connections to each component is given in the next paragraphs.
  • Page 75 NT-2000 REF Manual Installation 7.3.1. Introduction ( continued –2 / 2 Figure 7-5 Overall Connections...

  • Page 76: Connector Pin Assignments And Connections

    NT-2000 REF Manual Installation 7.3.2. Connector Pin Assignments and Connections The pin assignments of the connectors and connections to the pins are illustrated below. Power Supply Receptacle ① Figure 7-6 Power Supply Receptacle ( Front View) Pin # 3 (Ground ) Pin # 1 ( 24V+) Pin # 2 ( –...
  • Page 77 NT-2000 REF Manual Installation 7.3.2. Connector Pin Assignments and Connections ( – continued 2 / 8 Fuse Holder ③ Figure 7-8 Fuse Holder A 3–ampere (3A) cartridge fuse ( 5.2X20 mm, slow–blow type) is inserted in the holder. Reversing the power cable polarity causes the fuse to blow. <...
  • Page 78 NT-2000 REF Manual Installation 7.3.2. Connector Pin Assignments and Connections ( – continued 3 / 8 Antenna Receptacle (BNC) for Second Receiver Antenna ⑥ Figure 7-11 Antenna Connector for 2nd Receiver Antenna If a separate antenna is desired for reception of the second receiver frequency (490 kHz or 4209.5 kHz), ask the dealer to change the input wiring first, and then plug the appropriate...
  • Page 79 NT-2000 REF Manual Installation 7.3.2. Connector Pin Assignments and Connections ( – continued 4 / 8 RS–422 Transceiver Data Sheet – 1 / 3 7-10...
  • Page 80 NT-2000 REF Manual Installation 7.3.2. Connector Pin Assignments and Connections ( – continued 5 / 8 RS–422 Transceiver Data Sheet – 2 / 3 7-11...
  • Page 81 NT-2000 REF Manual Installation 7.3.2. Connector Pin Assignments and Connections ( – continued 6 / 8 RS–422 Transceiver Data Sheet – 3 / 3 7-12...
  • Page 82 NT-2000 REF Manual Installation 7.3.2. Connector Pin Assignments and Connections ( – continued 7 / 8 RS–232C Connector ⑧ An optional serial printer (PR–900) is to be plugged into this receptacle. A D–Sub 9 female type plug mates with this connector. The pin assignments are illustrated below.
  • Page 83 NT-2000 REF Manual Installation 7.3.2. Connector Pin Assignments and Connections ( – continued 8 / 8 I / O DATA Connector ⑨ The I/O DATA port is primarily for data communications with other onboard devices using IEC 61162–1 ( NMEA–0183 ) as the interface. It also provides a port ( comprising pins #4, #5 and #6) for software updating, and a regulated 12V DC 200mA output for powering light–duty applications.

  • Page 84: Ins Port Data And Command Sentences

    NT-2000 REF Manual Installation 7.4. INS Port Data and Command Sentences The equipment supports the following IEC 61162–1 data sentence formats for communications with an INS / IBS system via the RS–422 port. It is assumed that the port is set to ON via the procedure given in paragraph 4.11.2.2. 7.4.1.

  • Page 85: Navtex Receiver Masks

    NT-2000 REF Manual Installation 7.4.2. NAVTEX Receiver Masks The following command is used to manipulate the configuration masks that control which messages of which stations are to be received/stored and sent to the RS–422 port or to the RS–232C port. User settings made via the keypad will be changed accordingly. $CRNRM hhhhhhhh hhhhhhhh...

  • Page 86: Alarm Output Sentence Format

    NT-2000 REF Manual Installation 7.4.3. Alarm Output Sentence Format The following format sentence is output to the RS–422 port to report the reception of a warning NAVTEX message or the current alarm condition or to indicate an equipment failure or malfunction. $CRALR 72 <...

  • Page 87: Proprietary Sentences

    NT-2000 REF Manual Installation 7.4.5. Proprietary Sentences The following commands ( I E C 6 11 6 2 – 1 proprietary format sentence) are supported to externally switch the second receiver frequency: $PJMCR hh < R> < F> ① ② ③...

  • Page 88: Summarized Theor Y Of Operation

    NT-2000 REF Manual Theory of Operation Summarized Theor y of Operation 8.1. What is NAVTEX? NAVTEX, a system of broadcast and automatic reception of global maritime safety information by means of direct display/printing telegraphy, is part of the GMDSS infrastructure, defined by IMO Assembly resolution A.706 (17).

  • Page 89: Navtex Receiver - General

    NT-2000 REF Manual Theory of Operation 8. Summarized Theory of Operation ( – 2 /6 ) continued 8.5. NAVTEX Receiver – General A NAVTEX receiver that complies with the relevant IMO resolutions and regulations for wheel mark certification is programmed to automatically receive and display/print a message, and avoids a repeated reception of the same message by checking the ID and numbering of each message.
  • Page 90 NT-2000 REF Manual Theory of Operation 8. Summarized Theory of Operation ( – continued 3 / 6 8.7. Operating Principle of NT–2000/DEBEG 2902 Figure 9-1 shows interconnections between the printed circuit boards (PCBs) comprising the NT–2000 /DEBEG 2902 system and interface connections from the PCBs to data input/output ports and peripheral devices.

  • Page 91: Operating Principle Of Nt-2000/Debeg 2902

    NT-2000 REF Manual Theory of Operation 8. Summarized Theory of Operation ( – continued 4 / 6 8.7. Operating Principle of NT–2000/DEBEG 2902 ( continued –2 / 2 Power Supply Circuit The power supply PCB ( N501–PWR–A/B) consists mainly of a switch–mode voltage regulator (U2) and a three–terminal voltage regulator (U1), supplying regulated DC outputs ( 3.3V, 5V, 12V ) from an input voltage ranging 11 to 36 volts, though the nominal voltage is 24 volts at which the performance specifications are fully met.
  • Page 92 NT-2000 REF Manual Theory of Operation 8. Summarized Theory of Operation ( – continued 5 / 6 Figure 8-1 Interconnections continued on next page...
  • Page 93 NT-2000 REF Manual Theory of Operation 8. Summarized Theory of Operation ( – continued 6 / 6 Figure 8-2 Antenna Switching Circuit...
  • Page 94 NT-2000 REF Manual Specifications Specifications (1) IEC 60945–2002 Equipment Category: ･ Receiver Cabinet : Protected ･ Active Antenna Unit : Exposed (2) Receive Frequencies : ･ First Receiver : 518 kHz ･ Second Receiver : 490 kHz and 4209.5 kHz, front panel–selectable (3) Type of Receiver : ･...

  • Page 95: Specifications

    NT-2000 REF Manual Specifications Specifications ( – continued 2 / 4 ( 10 ) Second Receiver Selection: 490 kHz or 4209.5 kHz selectable via menu system ( 11 ) Source of Time : Derived from CPU clock 24.00 MHz for calculation of time passage to handle message aging.
  • Page 96 NT-2000 REF Manual Specifications Specifications ( – continued 3 / 4 ( 18 ) Message Protection: Up to 50 messages can be protected against automatic erasure, and are saved in a separate area of the non–volatile message memory. Protection of a user–selected message can be cancelled to allow automatic erasure after a 60–hour time passage.
  • Page 97 NT-2000 REF Manual Specifications Specifications ( – continued 4 / 4 ( 23 ) Power Requirements: 24 VDC ( nominal), approx. 15W. Floating ground. The unit operates safely over a 11–to–36V range. ( 24 ) Cabinet Size & Weight: 225 / 245 (W) X 225 / 271 ( ) X 135 (D) mm Approx.

  • Page 98: List Of Alarms

    NT-2000 REF Manual List of Alarms List of Alarms 10.1. Message Alarms Alarm for D–Type Message ● ･ Enabled / Disabled Status: Enabled at all times. ･ Triggering Condition: To be triggered upon reception of a D–type message. ･ User Interface: - Audible: Beeping at approx.
  • Page 99 NT-2000 REF Manual List of Abbreviations 11. List of Abbreviations The abbreviations used in this manual and menus, on screen, control panel and rear panel are listed below. amperes ACKNLG: Acknowledge ALM: Alarm ANT: Antenna BNC: Type of coaxial connector BRT: Brightness control key BSH:...

  • Page 100: List Of Abbreviations

    NT-2000 REF Manual List of Abbreviations List of Abbreviations – 2 / 2 meters milliamperes min: minutes millimeters MON : Monitor ( audible monitor ) MSG : Message ( NAVTEX message ) MPU: Microprocessing Unit NC : No connection ( no internal connection ) NMEA : U.S.

  • Page 101: User Settings To Be Stored In Non-Volatile Memory

    NT-2000 REF Manual User–made Settings 12. User Settings To Be Stored in Non–Volatile Memory The following user–made settings will be stored in the non–volatile memory. Screen Brightness Level: Last used level ● Keypad Dimmer Level: Last used level ● Settings via Menu System ●...

  • Page 102: List Of Components To Be Shipped

    ( INVOICE, PACKING LIST, e t c . as requested by the user) to be attached to the shipment. If your equipment is purchased from a JMC–authorized dealer, or if it is an OEM model, a different set of components may be delivered. Contact your dealer for details.

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Debeg 2902

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