JMC NT-2000 User manual

NT–2000 REF Manual
UM-NT2000-07
First Edition
October, 2005
Operation & Installation
for MODEL
NT–2000/DEBEG 2902
Dual Channel
NAVTEX Receiver
(Receiver Unit: PROTECTED EQUIPMENT UNDER IEC 60945–2002)
(Antenna Unit: EXPOSED EQUIPMENT UNDER IEC 60945–2002)
Valid for Software Version 1.2
sales@japan–marina.co.jp
www.japan–marina.co.jp

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.
Alterations resulting from technical progress are reserved.
< WARRANTY >
The warranty terms and conditions for the DEBEG 2902 are given in a separate
sheet attached to the delivery of each unit.
SAM Electronics GmbH
Behringstraße 120 • 22763 Hamburg • Germany
Tel: [phone] • Fax: + 49 40 8825 4118 • Telex: 211 925
E–mail:navcom@sam–electronics.de
For Service
Customer Support Centre
Telephone: [phone] (24 hours)
Fax: [phone]
E–mail:shipservice@sam–electronics.de

NT–2000 REF Manual
WARRANTY
i
WARRANTY
Japan Marina Co. Ltd. (JMC) warrants the NT–2000 NAVTEX Receiver and its active
antenna ANT–2000 against defects in materials and workmanship for a period of one
year from the date of shipping from the factory, during which time JMC will, at its
option, either repair or replace products that prove to be defective.
Users shall ship defective products, freight prepaid, back to JMC, address given below,
for warranty service.
The warranty shall not apply to defects caused by:
●Misuse or incorrect usage
●Static discharges/ lightning strikes to the antenna or to the receiver or other types of
natural disaster
●RF power from radio transmitters in excess of 30V rms at the antenna input
●Improper or inadequate maintenance by the user
●Unauthorized service including modification, realignment of the receiver/antenna
●User–supplied software or interfacing
●Operation outside the environmental specifications listed in the manual, or
●Improper installation
The above warranty applies to the original user who purchased the products direct from
JMC. If your unit was supplied by a JMC–authorized dealer, different warranty terms
and conditions may apply. 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
･Software release date and revision (REV.) number
･Power supply voltage
･Installation details, including antenna height and surrounding environment
･Detailed description of trouble
･Valid proof of purchase from JMC
･Invoice marking “MADE IN JAPAN, being returned for repairs.”
Japan Marina Co. Ltd.
36–2–1001 Udagawacho, Shibuya–Ku, Tokyo 150–0042
PHONE: [phone], FAX: [phone]
E–Mail: sales@japan–marina.co.jp

NT–2000 REF Manual
WARNINGS AND CAUTIONS
ii
< 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” EQUIPMENT
CATEGORY AS DEFINED UNDER IEC 60945(2002), AND IS NOT
WEATHERIZED FOR OUTDOOR INSTALLATION/OPERATION. ANY
DAMAGE CAUSED DIRECTLY OR INDIRECTLY THROUGH WATER
INTRUSION IS NOT COVERED BY THE MANUFACTURER’S OR
DEALER’S WARRANTY.
3. INSTALLATION & OPERATING PROCEDURES
ANY DAMAGE CAUSED BY INSTALLING OR OPERATING THE
EQUIPMENT OUTSIDE THE SPECIFICATIONS DESCRIBED IN THIS
MANUAL IS NOT COVERED BY THE MANUFACTURER’S OR
DEALER’S WARRANTY.
CONTACT YOUR DEALER FOR WARRANTY CONDITIONS.
4. LIABILITY
●OPERATION
NEITHER THE MANUFACTURER NOR ITS DEALER IS RESPONSIBLE
FOR ANY LOSS OF LIFE, PERSONAL INJURY OR DAMAGE TO THE
PROPERTY RESULTING FROM THE USE OF THIS EQUIPMENT OR
FROM BEING UNABLE TO OPERATE THE EQUIPMENT FOR ANY
REASON.
●MANUAL
REASONABLE PRECAUTIONS HAVE BEEN TAKEN TO PREPARE THIS
MANUAL. HOWEVER, NEITHER THE MANUFACTURER NOR ITS
DEALER ASSUMES ANY RESPONSIBILITY FOR ERRORS OR
OMISSIONS.

NT–2000 REF Manual
WARNINGS AND CAUTIONS
iii
< 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 output 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
extended periods of time.
2: Operational – Memory–Full Indications
As soon as the equipment has stored a total of 199
messages, the following caution will show up in the
bottom command/prompts line along with 3 beeps:
MEMORY FULL ! [CLR] TO ACKNLG.
The oldest message will then be erased from memory
automatically after reception of a next new message. As
soon as you notice the above warning, be sure to
acknowledge each unread message by pressing

,
and if necessary, press

to protect important
messages you wish to retain for permanent storage.
3: Environmental Safety – Equipment Disposal
Neither the display cabinet nor the active antenna unit
contains any materials considered hazardous to the
environment. However, if either unit is to be discarded
for any reason, be sure to follow all relevant local
ordinances/regulations, and contact your dealer or the
manufacturer (contact information given below) for
assistance or instructions before disposing of it.
Japan Marina Co. Ltd.
36–2–1001 Udagawacho, Shibuya–Ku, Tokyo 150–0042
PHONE: [phone], FAX: [phone]
E–Mail: sales@japan–marina.co.jp

NT–2000 REF Manual
Index
iv
1. Typical NAVTEX Message Screen.............................................................1-1
1.1. Introduction........................................................................................................1-1
1.2. Indication of Reception and Storage of New NAVTEX Message......................1-5
2. Control Panel Functions .........................................................................2-1
3. 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. Adjusting Keypad Backlighting Level ..............................................................3-2
3.5. Switching First and Second Receivers ..............................................................3-2
3.6. Scrolling NAVTEX Messages.............................................................................3-3
3.7. Stopping Audible and Visual Alarm ..................................................................3-4
3.8. Protecting Messages for Permanent Storage....................................................3-5
3.8.1. Introduction ..............................................................................................3-5
3.8.2. Protecting Procedure ..............................................................................3-5
3.8.3. Removing Protection Tag ......................................................................3-6
4. Customizing Operation via Menu System...................................................4-1
4.1. Introduction........................................................................................................4-1
4.2. Accessing the Menu System ..............................................................................4-1
4.3. Selecting Screen Background Colors ................................................................4-2
4.4. Selecting Message Font Types...........................................................................4-2
4.5. Turning on/off Screen Sleep Mode.....................................................................4-3
4.5.1. Introduction...............................................................................................4-3
4.5.2. Turning Sleep Mode on ............................................................................4-3
4.5.3. Setting Times to Reduced Brightness Levels ......................................4-4
4.6. Selecting Frequencies for Second Receiver.......................................................4-4
4.7. Turning on/off Keypress Beep ...........................................................................4-5
4.8. Selecting and Rejecting Transmitters and Message Types..............................4-6
4.8.1. Selecting and Rejecting Transmitters..................................................4-6
4.8.2. Selecting and Rejecting Message Types ..............................................4-8
4.9. Searching Memory for Stored Messages.........................................................4-10
4.10. Selecting Output Messages .............................................................................4-11
4.10.1. Introduction ............................................................................................ 4-11
4.10.2. Outputting Live NAVTEX Messages ................................................4-12
4.10.3. Outputting All Stored Messages .......................................................4-13

NT–2000 REF Manual
Index
v
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
4.11.1. Introduction ..........................................................................................4-19
4.11.2. Enabling / Disabling I / O Ports .............................................................4-19
4.11.3. Selecting Communications Protocols ...........................................4-21
4.11.4. Selecting Bit Formats and Data Transfer Rates ......................4-22
4.12. Performing Self–Diagnostic Tests ..................................................................4-25
4.12.1. Introduction ............................................................................................4-25
4.12.2. Activating Self–Diagnostic Function .................................................4-25
4.12.3. Checking Test Results .............................................................................4-26
4.13. Turning on/off Message Alarms.......................................................................4-27
4.14. Resetting the System......................................................................................4-28
5. User–Level Troubleshooting .....................................................................5-1
5.1. Power–Up Problems...........................................................................................5-1
5.2. No Message Reception .......................................................................................5-2
5.3. Message Storage Problems................................................................................5-4
5.4. Poor Reception ...................................................................................................5-5
5.5. Blank Message Screen.......................................................................................5-6
5.6. Uncontrollable Screen Brightness.....................................................................5-6
5.7. No Beep from Keypress .....................................................................................5-6
5.8. No Response from Keypress ..............................................................................5-7
5.9. No Message Alarm Indication ...........................................................................5-7
5.10. No Message Alarm Output ................................................................................5-8
5.11. No External Outputs .........................................................................................5-8
5.12. External Control Problem .................................................................................5-9
6. User–Level Maintenance Instructions ................................................6-1
6.1. Maintenance on the Equipment Cabinet ..........................................................6-1
6.2. Maintenance on Electrical Connections............................................................6-1
6.3. Maintenance on The Active Antenna Unit........................................................6-2
6.4. Self–Diagnostic Tests.........................................................................................6-2
6.5. Recommended Spare Parts................................................................................6-3

NT–2000 REF Manual
Index
vi
7. Installation ............................................................................................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. Connector Pin Assignments and Connections ....................................7-7
7.4. INS Port Data and Command Sentences........................................................7-15
7.4.1. Received NAVTEX Sentence Format .................................................7-15
7.4.2. NAVTEX Receiver Masks .....................................................................7-16
7.4.3. Alarm Output Sentence Format ........................................................7-17
7.4.4. Alarm Acknowledgement .....................................................................7-17
7.4.5. Proprietary Sentences ..........................................................................7-18
8. Summarized Theory of Operation ........................................................8-1
8.1. What is NAVTEX?..............................................................................................8-1
8.2. Operating Frequencies ......................................................................................8-1
8.3. Service Area........................................................................................................8-1
8.4. Error Correction.................................................................................................8-1
8.5. NAVTEX Receiver – General.............................................................................8-2
8.6. The NT–2000/DEBEG 2902 NAVTEX Receiver ..............................................8-2
8.7. Operating Principle of NT–2000/DEBEG 2902 ................................................8-3
9. Specifications .........................................................................................9-1
10. List of Alarms ......................................................................................10-1
10.1. Message Alarms ...............................................................................................10-1
10.2. Operational Alarms..........................................................................................10-1
11. List of Abbreviations ........................................................................... 11-1
12. User Settings To Be Stored in Non–Volatile Memory ............................12-1
13. List of Components To Be Shipped .........................................................13-1

NT–2000 REF Manual
Typical NAVTEX Message Screen
1-1
1. 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.
A brief description of on–screen indications is given below and in the following pages.
Figure 1-1 Typical NAVTEX Message Screen (First Receiver Page)
①Indication of Receiver in Use to Display Current Messages
･1ST RCVR: First receiver, 518 kHz
･2ND RCVR1: Second receiver, 490 kHz or 2ND RCVR2:4209.5 kHz
The two receivers can be switched by pressing

.
②Message No. and Total No. of Messages Stored
The message number of the currently displayed message along with the total
number of stored messages is indicated in the following format:
Examples:
・12/12: Message #12 (newest message ) of 12 messages stored
・1/12: Message #1 (oldest message ) of 12 messages stored
③Message Scrolling Keys
The keys that can be used to scroll messages on the current screen are indicated.
・
 : Line–by–line scrolling by pressing

/

・
 : Message–by–message scrolling by pressing

/

(
continued on next page )
1ST RCVR MSG (12/12)   STANDBY
ID21 INEW MESSAGEIIALARM!II
091230 UTC AUG 05
COLLISION NO, 223
KAISHIN MARU/JL5989 COLLIDED WITH
MALTESE VESSEL WEI HANG. MALTESE
VESSEL SANK AT POSITION 35-32.03N
140-47.08E AT 212010 UTC.
16 CREWMEN WERE RESCUED AND 5 OTHERS
ARE STILL MISSING.
SHIPS IN THE VICINITY ARE REQUESTED TO
KEEP A SHARP LOOKOUT AND REPORT ANY
INFORMATION TO THE COAST GUARD.
CANCEL COLLISION NO. 221.
NNNN STORED (CER= 00%)
MORE NEW MSG LEFT !
①②③④
⑤
⑥
⑨
⑩
⑬
⑦
⑧
⑪
⑫

NT–2000 REF Manual
Typical NAVTEX Message Screen
1-2
1. Typical NAVTEX Message Screen (
continued – 2/5 )
1.1. Introduction (
continued – 2/4 )
④Receiver Operating Status Indication
The current status of receiver operation is indicated here.
・STANDBY: Receiver is waiting for a NAVTEX message transmission.
・ACQUIRING: Receiver is currently in the process of locking onto the start of
the current message transmission.
・LOCKED: Receiver has locked onto the current NAVTEX transmission,
allowing a message to be received. As soon as the equipmet
starts receiving the message, this indication will be replaced
by its message ID.
・ABORTED: Receiver has failed to lock onto the current transmission, or
has already received the same message.No message will be
received.
⑤Operating Status Line
The current status of receiver operation, text scroll keys, etc. are indicated here.
Examples:
・1ST RCVR MSG: Message received on the first receiver is currently displayed.
・2ND RCVR MSG: Message received on the second (490 or 4209.5 kHz) is
currently displayed.
・  : Message can be scrolled line by line by pressing /.
・STANDBY: Receiver is idling, waiting for a NAVTEX message
transmission. See ④above for details.
⑥Message Identification (Message ID)
The ID of the currently displayed message is shown here. A red–colored ID
represents a warning message. A message ID consists of the following elements:
station ID, message type, and message serial number, as in the following example:
Figure 1-2 NAVTEX Message ID Format – Example
*1:
ID of the transmitter from which the message was received .
Examples: I in NAVAREA ⅩⅠ : Yokoha ma, Jap an
L in NAVAREA Ⅲ: Limnos, Greece
P
in NAVAREAⅠ: Ijmuiden, Netherlands
*2: Type (category) of this message (subject indicator)
Examples: A: Navigational warnings
B: Weather warnings
D:
Search and rescue (SAR), piracy or armed robbery warnings
*3:
Serial number of this message
Each message within the same category group is allocated a serial number between
00 and 99 by each transmitter. A message with number 00 is always received on
each transmission regardless of rejection settings, and will be stored in memory.
(
continued on next page )
I B 4 3
*3Message serial number
(
B3&B4characters)
*2Message Type
(
B2character)
*1Transmitter ID
(
B1character)

NT–2000 REF Manual
Typical NAVTEX Message Screen
1-3
1. Typical NAVTEX Message Screen (
continued – 3/5 )
1.1. Introduction (
continued – 3/4 )
⑦Alarm Tag IIALARM!III
This tag represents a visual alarm and is turned on when a NAVTEX message of
one of the following types has been received.
･Type–A Message: Navigational warning (initially disabled).
･Type–B Message: Weather warning (initially disabled).
･Type–D Message: Search and rescue (SAR) information, piracy and armed robbery
warnings. All text characters will be displayed in red to
distinguish it from other alarm messages.
･Type–L Message: Additional navigational warning (initially disabled)
NOTE: When a type–D message
has been received, an audible
alarm will also be turned on,
beeping at approx. 1 second
intervals. To silence the alarm
sound, press
.
The alarm for the message types A, B and L is initially disabled. It can be enabled
via SYSTEM MENU – 9:TURN ON/OFF MESSAGE ALARM.See paragraph 4.13 for details.
⑧New Message Tag IINEW MESSAGEII
This indication ( tag) shows that the currently displayed NAVTEX text is a new
message that you have not yet read or acknowledged.
To acknowledge it, simply press or , turning the tag off.
If two or more new messages have been left unread, the following caution message
will be displayed at the screen bottom, prompting you to read them. Press 
again to display, or scroll the text up to, the next one by pressing

/

.
The NEW MESSAGE tag for the current message will be automatically turned off
24 hours after its reception, if it is left unacknowledged (i.e. if is not pressed).
⑨NAVTEX Message
If the message text exceeds the screen display area, you can scroll it line–by–line by
pressing

/

. Holding down either key accelerates the scroll.
To read other messages, press

/

(for message–by–message scrolling).
Holding down either key accelerates the scroll.
Type D messages (search–and–rescue, piracy or armed robbery information) will be
displayed in red.
NOTE: Forced carriage return: 
When the number of characters in a line exceeds 40, an internally generated
carriage return symbol, shown above, will be automatically inserted in the 40th
character position to divide the last word, forcing the rest of the characters in the
word to shift to the top of the next line. This symbol will be replaced by an
underscore ( _ ) when it is printed or output to an INS device via the RS–422 port.
( continued on next page )
Silencing the audible alarm constitutes
your acknowledgement of the current
alarm message.
< CAUTION >
MORE NEW MSG LEFT !

NT–2000 REF Manual
Typical NAVTEX Message Screen
1-4
1. Typical NAVTEX Message Screen (
continued – 4/5 )
1.1. Introduction (
continued – 4/4 )
⑩End–of–Message Indication NNNN
The appearance of these four successive N characters indicates the end of the
currently displayed NAVTEX message.
NOTE: Some messages including those from Chinese stations, end with NN (2 Ns)
instead of NNNN (4 Ns).
⑪Indication of Message Storage Status
This indication shows whether or not the displayed NAVTEX message has been
stored in the internal non–volatile memory.
･STORED: The message has been stored.
･STORAGE ABORTED: The message has not been stored.
When message reception has been completed with a character error rate (CER) of
33% or less, the received NAVTEX message together with its ID will be stored in
memory, making it possible to recall it onto the screen at a later time.
If the same message is received with a lower CER on the next transmission, the
previously stored message will be replaced with the new one.
When the CER exceeds 33%, the message and its ID will not be stored in memory,
allowing a retransmission of the same message to be received.
⑫Character Error Rate (CER) Indication
CER is the percentage ratio of the total number of asterisks (*) to the total number
of characters received, including control codes (sync. signal, carriage returns, line
feeds, letter/numeral shift, etc.), in a message. If a message is received with a CER
equal to or greater than 33%), the message will not be stored in memory.
⑬Message Prompt Line
This line indicates the receiver’s response for the user’s keypress or displays
prompts related to reception of new or alarm NAVTEX messages on the first or
second receiver, or related to message storage, like the examples below.
･ALARM MESSAGE RECEIVED ON 2ND RCVR
･MORE UNREAD ALARM
*1MSG LEFT
･2ND *2RCVR RECEIVED NEW MSG
･MORE NEW MSG LEFT
･STORAGE LIMIT IS REACHED
･MEMORY FULL !
*3[CLR] TO *4ACKNLG.
*1MSG = MESSAGE, *2RCVR = RECEIVER
*3[CLR] =
 *4ACKNLG = ACKNOWLEDGE

NT–2000 REF Manual
Typical NAVTEX Message Screen
1-5
1. 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 (iNEW MESSAGEi) to the message ID, as in the example below.
The tag will be turned off 24 hours after reception or when you press .
Figure 1-3 First Receiver Receiving New NAVTEX Message – Example
●Indicating Reception of New Message – Second Receiver
When the first receiver message screen is currently showing, the reception of a new
message on the second receiver is indicated with message “ 2ND RCVR RECEIVED
NEW MSG” blinking in the prompt line at the screen bottom, as in the example
below. To read it, switch to the second receiver page by pressing .
Figure 1-4 Indication of New Message Reception on Second Receiver – Example
●Indicating Successful Storage of New Message
When a new NAVTEX message has been received with a character error rate (CER)
of 33% or less, the message will be stored in non–volatile memory together with its
ID; this condition is displayed with indication “STORED” at the end of the message
together with its CER reading, as in the example above.
If the CER exceeds 33%, the current message will not be stored, and indication
“STORAGE ABORTED” is displayed at the end of the message.
IB62 INEW MESSAGEI
100300 UTC OCT 05
WWJP73 RJTD 100000
IMPORTANT WARNING FOR YOKOHAMA NAVTEX
AREA
10000UTC ISSUED AT 100300 UTC
TROPICAL DEPRESSION 1004HPA AT 22.9N 134.5E
MOVING WEST 10 KNOTS
･･････････････････････････････････････････････
･･････････････････････････････････････････････
｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡｡
NNNN STORED (CER= 00%)
Tag indicating reception of new message
Message ID
End
–
of
–
message indication
Successful storage indication Character error readout
..................................................
1.1. NNNN STORED
(
CER= 00%
)
2ND RCVR RECEI
V
ED NEW MSG
This message blinks .

NT–2000 REF Manual
Control Panel Functions
2-1
2. 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
①Screen Brightness Key 
Repeated pressing of this key adjusts the screen brightness in a total of 8 steps
including a completely dark level. The last used level is stored in memory. The
brightness level returns to its maximum on next power–up when the equipment is
switched off with the level set to its minimum. See paragraph 4.5 for related
information.
②Power Key
– 1/2
Figure 2-2 Opening Message – Example
This key turns the unit on/off. A
first keypress turns it on,
displaying an opening message
like the example at right for
approximately five seconds.
Figure 2-3 Power–Off Countdown Window
Keep on pressing the key until all
five bars have disappeared, and
then release the key to
completely switch it off. This
delayed action helps prevent an
accidental shutoff and loss of
data.
Releasing the key with at least one countdown bar showing cancels the power–off
sequence.
(
continued on next page )

  

  



  

  
②④⑥⑧⑩⑫⑭⑯⑰
①③⑤⑦⑨⑪⑬⑮
WELCOME TO NAVTEX RECEIVER
SOFTWARE VER. 1.2 REV. 2.9
DATE: OCT 13, 2005
To turn the unit off, press and
hold down

for 2–3 seconds
until a power–off countdown
window shows up as illustrated
at right, indicating that a
power–off sequence has started.
SHUTTING DOWN NAVTEX RECEIVER
WAIT !– – – – –
Countdown bars

NT–2000 REF Manual
Control Panel Functions
2-2
2. Control Panel Functions (
continued – 2/10 )
②Power Key
– 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.
Figure 2-4 Current Settings of Receiver Control Parameters – Example
The above list will stay on for approximately 20 seconds before the message screen
shows up, replacing it automatically.
To turn the list off immediately, press

or .
③Keypad Dimmer Key 
Pressing this key adjusts the keypad backlighting level in a total of 8 steps
including a completely switched–off level.
The last used level will be stored in memory. When the equipment is switched off
with the level at its minimum, the keypad will be lit at the highest level at next
power–up time.
④Audible Monitor Key 
Pressing this key allows you to audibly monitor the reception of a NAVTEX
transmission. To monitor the sound continuously, hold down the key. As soon as it is
released, the audible output is turned off.
(
continued on next page )
CURRENT SETTINGS
1:FIRST RECEIVER:
REJECTED STATIONS:
REJECTED MESSAGE TYPES: G I M
NO P Q R S T U W X Y
2:SECOND RECEIVER:
REJECTED STATIONS:
REJECTED MESSAGE TYPES: G I M
NO P Q R S T U W X Y
3:KEYPRESS BEEP: ON
4:DISABLED MSG ALARMS: A B L
5:2ND RECEIVER FREQ.: 490KHZ
6:DISPLAY SLEEP MODE: 5MIN./ 30MIN.
IPRESS [CLR]OR [ENT] TO START.
Blinks in reverse video.

NT–2000 REF Manual
Control Panel Functions
2-3
2. Control Panel Functions (
continued – 3/10 )
⑤Screen Page Key 
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.
518 kHz NAVTEX message display), a first keypress changes the display to show
the second receiver page (i.e. 490 kHz/4209.5 kHz message display). A second press
changes it back to the first receiver page. See paragraph 3.5 for more details.
⑥Alarm Stop Key 
The equipment will alarm you audibly through a built–in buzzer and visually by
turning an alarm indication ( iALARM! I ) in reverse video on the message screen
upon reception of an important NAVTEX warning (type–D message, for example). A
type–D message text will be displayed in red. See paragraph 3.7 for more details.
Pressing this key silences
the audible alarm. The
alarm tag is also removed.
Observe the CAUTION at
right.
If more alarm messages are left unread in memory, a next alarm message will be
displayed after the above keypress.
⑦Up Key

･When a NAVTEX message is currently being displayed, pressing this key scrolls
the message screen downward one line at a time, allowing you to view message
lines hidden beyond the screen’s upper limit. When the newest message (e.g.
200/200) is reached, a further keypress displays the oldest one (e.g. 1/200).
Holding down the key accelerates the scrolling.
･When a menu is currently being displayed, pressing this key selects (highlights)
vertically listed options upward. Press after highlighting the desired option.
⑧Left Key 
･When a NAVTEX message is currently being displayed, a single press of this key
scrolls the message text by one message forward chronologically, displaying a
newer message. Holding down the key accelerates the scroll.
When the newest message (e.g. 200/200) is currently shown, a further keypress
returns you to the oldest message (e.g. 1/200).
･When a currently displayed menu has horizontally listed options, pressing this
key selects (i.e. highlights) those options in a leftward direction. Be sure to press
after highlighting the desired option.
(
continued on next page )
Silencing the audible alarm constitutes
your acknowledgement of the current
alarm message/condition.
< CAUTION >

NT–2000 REF Manual
Control Panel Functions
2-4
2. Control Panel Functions (
continued – 4/10 )
⑨Enter Key

･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.
⑩Down Key

･When a NAVTEX message is currently being displayed, pressing this key scrolls
the message screen upward one line at a time, allowing you to view message lines
hidden beyond the lower limit of the screen. When the oldest message (e.g. 1/200)
is displayed, further keypress returns you to the newest message (e.g. 200/200).
Holding down the key accelerates the scrolling.
･When a menu is currently being displayed, pressing this key selects (highlights)
vertically listed options downward. Be sure to press after highlighting the
desired option.
⑪Message/Station Selection Key – 1/2
･When a NAVTEX message is currently being displayed, pressing this key
displays a summary list of the transmitter IDs and message types selected for
reception on both the first and second receivers, as in the example below.
Figure 2-5 List of Currently Selected Stations and Message Types – Example
All transmitters and most of
major message types are initially
selected so that the equipment
will receive those selected types
of messages from all stations in
the coverage area.
A particular station or a
particular message type can be
rejected via the menu system.
→SYSTEM MENU →
5:MAKE SEL/REJ SETTING →
1/2/3 →1/2 →
Detailed instructions are given in
paragraph 4.8.
To turn off the above lists, press

.
(
continued on next page )
SELECTED STATIONS:
A B C D E F G H I J K L M
N O P Q R S T U VW X Y Z
SELECTED MESSAGES:
A B C D E F H J K L
VZ
< FIRST RECEIVER >
SELECTED STATIONS:
A B C D E F G HIJ K L M
N O P Q R S T U V W X Y Z
SELECTED MESSAGES:
A B C D E F H J K L
V Z
< SECOND RECEIVER 1>

NT–2000 REF Manual
Control Panel Functions
2-5
2. Control Panel Functions (
continued – 5/10 )
⑪Selection/Station Key
– 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. An example of station selecting procedure is
illustrated below.
Figure 2-6 Selecting Stations – Example
Currently selected
stations are shown
in green. Rejected
stations are in red.
Using

/

and

/

, select
the station ID you
wish to receive,
and then press

.
⑫Right Key

･When a NAVTEX message is currently being displayed, a single press of this key
scrolls the message text by one message backward chronologically, displaying a
older message.
When the oldest message (e.g. 1/200) is currently displayed, further keypress
returns you to the newest message ( e.g. 200/200).
Holding down the key accelerates the scroll.
･When a currently displayed menu has horizontally listed options, pressing this
key selects (highlights) those options in a rightward direction. Be sure to press
after highlighting the desired option.
(
continued on next page )
Station C is currently rejected. To select it, press .
 SYSTEM MENU
4:MAKE SEL/REJ SETTING
1:SYNCHRONIZE BOTH RECEIVERS
2:FIRST RECEIVER (518KHZ)
3:SECOND RECEIVER
1:SYNCHRONIZE BOTH RECEIVERS
1:STATIONSI
2:MESSAGES
1:STATIONS
A:SELECTED J:SELECTED S:SELECTED
B:SELECTED K:SELECTED T:SELECTED
C:REJECTED L:SELECTED U:SELECTED
D:REJECTED M:SELECTED V:SELECTED
E:SELECTED N:REJECTED W:REJECTED
F:REJECTED O:SELECTED X:SELECTED
G:SELECTED P:SELECTED Y:SELECTED
H:SELECTED Q:SELECTED Z:REJECTED
I:SELECTED R:SELECTED

NT–2000 REF Manual
Control Panel Functions
2-6
2. Control Panel Functions (
continued – 6/10 )
⑬New Message Key 
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.
Figure 2-7 Indication of Reception of New Message
Pressing
removes the tag
from the message ID, meaning
that you have acknowledged
its reception.
The new message tag will be
automatically removed 24
hours after reception of that
message, even if you forget to
acknowledge it.
The above example shows that a number of new messages have been received, as
indicated by the bottom line prompt. Pressing will recall the next new
message on to the screen It may also be displayed by pressing

/

(for
line–by–line viewing) or

/

(for message–by–message viewing).
If no additional new message is left in memory, further keypress will cause the
following message to show blinking for a few seconds at the bottom, indicating an
operational error.
Figure 2-8 Indication of All New Messages Being Acknowledged
(
continued on next page )
Removal of the iNEW MESSAGEitag
constitutes your acknowledgement of
the currently displayed new message.
< CAUTION >
NEW MESSAGE Tag
IB76 INEW MESSAGEI
160301 UTC JUN 05
WWJP83 RJTD 160000
VITAL WARNING FOR YOKOHAMA NAVTEX AREA
DEVELOPING LOW 1004HPA AT 37N 147E MOVING
NE AT 15 KNOTS.
･･･････････････････････････････････････････････････
･･･････････････････････････････････････････････････
･･･････････････････････････････････････････････････
NNNN STORED (CER= 00%)
MORE NEW MSG LEFT !
More new messages are left unread.
Scroll to next one by further pressin
g

or

/

and

/

.
NO NEW MSG LEFT !
NNNN STORED (CER= 00%)

NT–2000 REF Manual
Control Panel Functions
2-7
2. Control Panel Functions (
continued – 7/10 )
⑭Message/Station Rejection Key – 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 *1menu system on both the first and second receivers, as in
the example below.
Figure 2-9 List of Currently Rejected Stations and Message Types – Example
*1: →SYSTEM MENU →4:MAKE SEL/REJ SETTING
Detailed instructions are given in paragraph 4.8.
*2* SECOND RECEIVER 1 = 490 kHz, SECOND RECEIVER 2 = 4209.5 kHz
･The following message types cannot be rejected due to the relevant IMO
resolutions and IEC regulations related to navigational safety:.
-Type A: Navigational Warning
-Type B: Meteorological Warning
-Type D : SAR (search and rescue) Information, Piracy or Armed Robbery Warning
-Type L : Additional Navigational Warning
･To turn off the above lists, press either

.
Pressing

turns the lists off and displays the SYSTEM MENU.
(
continued on next page )
REJECTED STATIONS:
REJECTED MESSAGES:
G I M
N O P Q R S T U W X Y
< FIRST RECEIVER >
REJECTED STATIONS:
REJECTED MESSAGES:
G I M
N O P Q R S T U W X Y
<SECOND RECEIVER *21 >