SAILOR HC4500
MF/HF CONTROL UNIT
Operating Instructions
Distress Calls, see page ii. List of contents, see page 1.
ii
5. Press “2182”.
6. Lift handset.
Press PTT and say:
“MAYDAY”
“This is”
- the 9-digit identity and the call sign or other identification of the ship,
- The ship’s position,
- The nature of distress and
assistance wanted,
- any other information which might facilitate the rescue.
“OVER.”
Quick DISTRESS Call
3 - 2 - 1 RELEASE
1. If off or STANDBY:
press ON/OFF.
2. Open DISTRESS lid.
3. Press DISTRESS
until RELEASE is displayed
Then the undesignated distress
call will be sent by default on the
distress frequency 2187.5 kHz.
Wait
for answer!
(The distress call is autorepeated every 5 minutes on
the same distress frequency.)
DISTRESS Acknowledgement
4. Press VIEW to read
the contents of call.
Press the DISTRESS button
for
3 seconds to transmit
TYPE : Distress
MSG. : Undesignated
Pos : N57°01 W009°53
Time : 13:01 UTC CANCEL
CH
FREQ
MODE
AM TELEPHONY
SIGNAL
POWER HIGH | | | | |
DISTRESS
Rx/Tx 2182.0 kHz
BAND
Read call contents.
Distress
acknowledgement
received
FROM: 002191000
VIEW
ABORT
Rx 2182.0 kHz
Tx 2182.0 kHz
CANCEL
MODE
SSB TELEPHONY TUNE<
SIGNAL CLRF
POWER HIGH SQUELCH ON | | | | | RF-G
Awaiting
Automatic
Repetition
Release
Press
Listen for answer!
0140
iii
What is What?
1. Display.
2. Indicator lamps. Condition when lit:
Tx: Transmitting.
CALL: DSC (see button 9) call for you received.
ALARM: Alarm call received.
3. Keyboard.
4. Shift key. Press and hold for yellow functions.
5. DISTRESS button. Protected by shield. To use, lift the shield
and press for 3 seconds, guided by the text displayed.
6. T uning control.
7. ON/OFF push button.
8. Volume control.
9. TEL/DSC function switch.
In TEL mode radiotelephone parameters are shown and
selected.
In DSC mode DSC parameters are shown and selected.
10. Opens the ADDR BOOK in DSC mode.
11. Tx CALL: Press to start creating a DSC call.
12. Opens the Rx log over received calls in DSC mode.
13. Soft keys. The function of each key is described in its respective
line at the right edge of the display.
13 12 11 10 9
1
2
345678
iv
Introduction
Congratulations on your new SAILOR HC4500 MF/HF maritime radio telephone with built-in DSC (Digital Selective Calling) system and
radiotelex, fulfilling the highest international standards for marine
MF/HF communication and safety procedures. For an explanation of
DSC, see page 2.
Your SAILOR HC4500 MF/HF is a part of the modular system 4000
which also includes a HF single sideband radiotelephone. It has
built-in MF/HF telex if connected to a PC and/or a printer. If connected to a GPS or other maritime navigation system it can automatically include the true UTC time and your position in its DSC
distress messages.
SAILOR marine equipment is specially designed for the extremely
rugged conditions on bord a ship, based on more than 50 years’
experience with all kinds of boats, from small pleasure crafts, over
fishing boats working under all climatic conditions, to the biggest
ships.
S.P. Radio A/S is one of Europe’s leading manufacturers of maritime
radiocommunication equipment - a position which has been maintained by means of constant and extensive product development.
We have a worldwide network of dealers with general agencies in
more than fifty countries. All our dealers are specially trained to
service all your SAILOR products.
About this manual
This manual is for the daily user of the system. Additionally, it
includes a section on the installation procedures, and - on page ii standard distress procedures. We highly recommend you to read
the manual
before
you start using the equipment.
Please note
Any responsibility or liability for loss or damage in connection with
the use of this product and the accompanying documentation is
disclaimed. The information in this manual is furnished for informational use only, is subject to change without notice, may contain
errors or inaccuracies, and represents no commitment whatsoever.
This agreement is governed by the laws of Denmark.
Document no.: B4500GB0 E/0404
Abbreviations Used in this
Manual
ADDR Address
AGC Automatic Gain Control
AM Amplitude Modulation
ARQ Automatic Repetition reQuest
CLRF Clarify
CU Control Unit
DIRTLX Direct T elex
DSC Digital Selective Calling
ETSI European Telecommunications Standards Institute
FEC Forward Error Correction
GA Go Ahead
GMDSS Global Maritime Distress and Safety System
GPS Global Positioning System
HF High Frequency
IMO International Maritime Organisation
IRS Information Receiving Station
ISS Information Sending Station
ITU International Telecommunication Union
MF Medium Frequency
MMSI Maritime Mobile Ship Identification
MOM Just a moment please
MSG Message
NBPD Narrow Band Direct Printing
PTT Push-To-Talk
RF-G Receiver Frequency Gain
Rx Receive
SSB Single Side Band
TEL Telephony
Tx Transmit
UTC Co-ordinated Universal T ime
VHF Very High Frequency
0404
1
Advanced DSC Calls ......................................................... 15
Changing a Function...................................................... 17
The Function Tree .................................................... 18
GMDSS Radiotelex Terminal ............................................ 19
Introduction .................................................................... 19
Keyboard Indicator Lamps............................................. 20
Keyboard Function Keys................................................ 20
Switching On .................................................................. 21
Channel Selection.......................................................... 21
Transmitting a Message................................................. 21
Editing a Message ......................................................... 21
Receiving a Message..................................................... 22
Installation and Initial Set-up ......................................... 22
Printer ....................................................................... 22
Keyboard .................................................................. 22
Modem Set-up.......................................................... 22
Example of FEC Transmission ...................................... 23
Example of ARQ Transmission to a Coast Statio.......... 23
Contents
Quick DISTRESS Call .......................................................... ii
DISTRESS Acknowledgement............................................ ii
What Is What? ..................................................................... iii
Introduction......................................................................... iv
About this Manual .............................................................. iv
Abbreviations...................................................................... iv
MF/HF Fundamental Info .................................................... 2
Propagation of MF and HF Radio Waves........................ 2
Radiotelephony ................................................................ 2
Radiotelex ........................................................................ 2
DSC.................................................................................. 2
Basic Functions ................................................................... 3
Switching ON/OFF ........................................................... 3
Setting Backlight Level .................................................... 3
Switching Loudspeaker ON/OFF..................................... 3
Volume Control ................................................................ 3
Switching Squelch ON/OFF............................................. 3
Setting Transmitter Power Level...................................... 3
Manual Call Functions ........................................................ 4
Telephony Channel Display Functions: ........................... 4
Frequency Display Functions: ......................................... 4
Tuning .............................................................................. 4
Station Display Functions: ............................................... 5
Distress Telephony Frequencies ..................................... 5
Distress Frequency Display Functions: ........................... 5
Two-tone Alarm Signal ........................................................ 6
Two-tone Alar m Display Functions: ................................. 6
Listening for Calls ............................................................... 6
Making a Manual Call .......................................................... 6
DSC Main Buttons ............................................................... 7
Calling Watch ................................................................... 8
DSC Display Operation ....................................................... 9
Receiving an Individual DSC Call.................................... 9
Receiving DISTRESS Call............................................. 10
Calling a SHIP.................................................................11
Calling a SHORE Station............................................... 12
Address Book................................................................. 13
Using Two Control Units ................................................ 14
Priority of Control Unit #1......................................... 14
Control Unit #2 Taking Over the Control.................. 14
Status Indication....................................................... 14
Responding to Incoming DSC Calls ........................ 14
Power On/Off By Control Unit #2 ............................. 14
Interconnecting......................................................... 14
DSC Scanning Frequencies..................................... 14
0404
2
MF/HF Fundamental Info
Propagation of MF and HF Radio
Waves.
MF/HF radiocommunications provide a medium and long range
service. The 1.6-4 MHz marine band is intended primarily for coastal
operation beyond normal VHF comm unication range. A reliable
range of more than 150 nautical miles can be expected in most
areas in the daytime, more in the nighttime. Propagation of the radio
waves in this band is mainly by ground waves i.e. the waves from
the transmitter aerial follow the earth’s curvature to the receiver
aerial. The high frequency range 4 - 30 MHz can provide
communication for hundreds or even thousands of nautical miles.
The long range is achieved by sky waves reflected from the ionosphere. Propagation of the radio waves depends on a number of
factors such as frequency, time of day, time of year, and solar
activity. The channels allocated to the maritime mobile service in the
HF range are divided into a number of bands: 4, 6, 8, 12, 16, 18, 22,
25 MHz to allow a suitable frequency band to be selected for
communication dependent on distance and time of day.
Radiotelephony
The mode of emission used for telephony transmissions in the
marine bands is SSB (single-sideband, J3E). On the international
distress frequency 2182 kHz compatible AM (amplitude modulation,
H3E) may be used in addition for communication with non-GMDSS
ships. AM mode is used also when receiving broadcasting. The
frequencies for radiotelephone distress and safety traffic in the HF
bands are 4125 kHz, 6215 kHz, 8291 kHz, 12290 kHz, and 16420
kHz. Working frequencies for public correspondence with coast
stations are arranged in pairs for duplex/semi-duplex operation. For
the HF bands these channels are allocated numbers by ITU on an
international basis. In addition a number of simplex frequencies are
available in each band for ship-to-ship communication.
Radiotelex
Marine telex is also referred to as ‘Narrow Band Direct Printing’
(NBDP). Due to the narrow bandwidth of the transmissions, a longer
range may be expected compared to radiotelephony. The frequencies for radiotelex distress and safety traffic are 2174.5 kHz, 4177.5
kHz, 6268 kHz, 8376.5 kHz, 12520 kHz, and 16695 kHz. Working
frequencies for public correspondence with coast stations are
arranged in pairs. For the HF bands these channels are allocated
numbers by ITU on an international basis. In addition a number of
simplex frequencies are available in each band for ship-to-ship
communication.
DSC
DSC (Digital Selective Calling) is an automatic calling system which
allows a specific station to be contacted and made aware that a
station wishes to communicate with it. In addition to calls to specific
stations the system can also be used to call ‘all ships’ and groups of
ships and this is of significance for its use for DSC distress alerting.
DSC is an alerting signal only and the communication which follows
the call is made on an appropriate frequency band using radiotelephony or radiotelex. The frequencies for DSC distress and safety
calling are 2187.5 kHz, 4207.5 kHz, 6312 kHz, 8414.5 kHz, 12577
kHz, and 16804.5 kHz. Calling frequencies for public correspondence with coast stations are arranged in pairs, both international and
national frequencies are assigned. In addition the frequency 2177
kHz may be used for ship-to-ship calling.
3
Basic Functions
Switching ON/OFF
1. Press the ON/OFF button.
Setting Backlight Level
1. Press the Shift key followed by the DIM key.
The backlight is changed from zero to maximum in four steps.
Repeat until the desired setting is reached.
Switching Loudspeaker ON/OFF
1. Press the Shift key followed by the SPK key.
Volume Control
1. Rotate the VOL button to adjust the loudspeaker sound volume.
Switching Squelch ON/OFF
(SSB Telephony mode)
1. Press the Shift key followed by the Squelch key.
When squelch is ON, the receiver output is muted in speech pauses.
Setting Transmitter Power Level
1. Press the Shift key followed by the Power Key.
The output power is set to HIGH, MED or LOW.
Repeat until the desired setting is reached.
4
Rx frequencies may be keyed in directly from the keyboard
Tuning
(Frequency display only)
1. Rotate the TUNE button to adjust frequency or RF-gain of the receiver.
Functions indicated by arrow in the Frequency display:
TUNE: Frequency tuning in 1 kHz steps (AM), 100 Hz steps (SSB) or 500Hz (Telex).
CLFR: Frequency tuning in 10 Hz steps.
RF-G: Manual RF-gain tuning, AGC off.
Frequency Display Functions:
Manual Call Functions
Telephony Channel Display Functions:
A channel number may also be keyed in directly from the keyboard.
If the channel is not allocated to the station selected, the station
name will disappear from the display.
Soft keys
Switches to Frequency display for viewing or altering frequencies.
Switches to Station display for selection of another station.
Steps to the next lower channel number of the station.
Steps to the next higher channel number of the station.
Squelch setting Receive: Signal strength
Mode of emission Transmit: Output power level
Output power setting
Name of station if selected.
Channel number.
LYNGBY FREQ
STATION
SSB TELEPHONY
SIGNAL
POWER HIGH SQUELCH ON | | | | |
CH 4 1 8
CH
Soft keys
Switches to Channel display and previous channel number.
Moves the arrow to Tx before keying in a Tx frequency.
Steps between SSB telephony, AM telephony and Telex mode.
Steps between Tune, Clarify and RF-Gain tuning functions.
Squelch setting Receive: Signal strength
Mode of emission Transmit: Output power level
Output power setting
> Rx 4357.0 kHz
Tx 4065.0 kHz
Receive frequency
Transmit frequency
CH
TX
MODE
SSB TELEPHONY TUNE<
SIGNAL CLRF
POWER HIGH SQUELCH ON | | | | | RF-G
5
Station Display Functions:
Distress T elephon y Frequencies
To switch to Distress Frequency display: Press 2182 Distress Freq key.
Distress Frequency Display Functions:
Soft keys
Selects the station and switches to Channel display for choice of channel number.
Returns to Channel display without selecting the station.
Selects previous station.
Selects next station.
Telex call code
Name of station
MMSI number of station
SELECT
CANCEL
NAME LYNGBY
CALL SIGN OXZ
MMSI NO 002191000
TELEX NO 37383
STN
ST A TION TABLE
CH
FREQ
MODE
AM TELEPHONY
SIGNAL
BAND
POWER HIGH SQUELCH OFF | | | | |
DISTRESS
Rx/Tx 2182.0 kHz
The frequencies for distress and safety telephony traffic are
2182 kHz, 4125 kHz, 6215 kHz, 8291 kHz, 12290 kHz, 16420 kHz
Soft keys
Switches to Channel display and previous channel number.
Switches to Frequency display.
Selects between AM and SSB mode of emission on 2182 kHz.
Steps to the distress telephony frequency in the next higher band.
Receive: Signal strength
Mode of emission Transmit: Output power level
Output power setting
Receive/transmit frequency.
6
Two-tone Alarm Signal
To switch to the Two Tone Alarm Signal display: Press the Shift key
followed by the Alarm key.
Transmission of the two tone alarm signal will continue for 45
seconds, but may be stopped manually by pressing the STOP key in
the frequency display. When the alarm signal ceases press the
handset key and transmit your distress message by speaking into
the handset microphone with a clear and calm voice.
Two-tone Alarm Display Functions:
Listening for Calls
Coast stations transmit traffic lists consisting of call signs/names of
the ships for which they have traffic.
The traffic lists are sent at specified times and at intervals of typically
two hours. They are broadcasted on the normal working frequencies
on the coast station. Ships should, as far as possible, listen to the
traffic lists transmitted by relevant coast stations. On hearing their
call sign they should establish communication as soon as they can
do so.
1. Select the appropriate station.
2. Select the channel on which traffic lists are transmitted.
3. Switch loudspeaker on and adjust volume to an appropriate
level.
If on HF, traffic lists are transmitted in more frequency bands
simultaneously, search for the channel with the best propagation
conditions.
Making a Manual Call
Wait until transmission of the traffic list has finished and the channel
is free. Call the coast station on the working frequency on which the
traffic list was received or as instructed by the coast station.
1. Hook off the handset.
2. Press the PTT key on the handset when speaking.
Say:
1. <Called station’s name (3 times)>
2. ‘This is’ <Your ship’s name (3 times)>
3. ‘Over’
3. Release the PTT key to listen.
4. When answered:
Follow the instructions from the coast station. The coast station may
ask for further identification, information on position and next port of
call, and may suggest another working channel for the traffic to
follow. If the coast station is not ready to receive traffic immediately it
may ask you to wait for a specific number of minutes.
Note: The two tone alarm signal generator is intended for alerting
ships not yet equipped with DSC equipment. It may be used only to
announce a distress message and primarily on the frequency 2182
kHz in AM telephony mode.
Soft keys
Returns to frequency display.
Starts test of the alarm signal generator.
Starts transmission of the two tone alarm signal.
Press the START button FREQ
TEST
seconds to send alarm
START
5
7
The button opens to the screen menu where all DSC calls
are stored.
In this menu NORMAL or DISTRESS calls, can be read separately
and sorted by time.
The
button opens to the DSC transmitter menu. From here it
is possible to make very easy calls. (SHORE, SHIP) and more
complicated calls including special category and tele commands.
DSC Main Buttons
To switch between the DSC STATUS and telephony displays:
press TEL/DSC.
The b utton opens the Address book menu.
An addr book call is a complete DSC call added a name. It is
possible to transmit, add or delete calls from here.
The
button switches between the DSC STATUS and
telephony displays.
The MF/HF set is equipped with two receivers. One for watch on the
distress frequencies and one for watch on the public DSC frequencies (calling watch). The calling watch receiver is identical with the
receiver of the radio, and therefore it is possible to switch the calling
watch on and off. The calling watch is only active in DSC mode, i e.
calling watch is automatically switched off when switching to the TEL
screen. But if calling watch is on and the user hooks on the handset,
the control unit will automatically switch to the DSC status menu.
Soft keys
Changes calling watch frequencies.
Switches between calling watch On/Off
Views watch frequencies.
Changes distress frequency used default for quick distress calls.
Telephony Display
LYNGBY FREQ
STATION
SSB TELEPHONY
SIGNAL
POWER HIGH SQUELCH ON | | | | |
CH 4 1 8
CH
DSC STATUS display
DSC STATUS
CHANGE
WATCH
Distress Watch: 2 4 6 8 12 16 MHz
Calling Watch: 2 2 1 1 4 -- MHz VIEW FREQ
Distress Frequency: 2187.5kHz DIST. FREQ
8
When wanted frequency is selected, press EXIT to return to DSC
screen.
Calling Watch
To switch to DSC screen:
press TEL/DSC.
Soft keys
Changes calling watch frequencies.
Switches between calling watch On/Off
Views watch frequencies.
Changes distress frequency used default for quick distress calls.
Specified frequency List of watch frequencies
EXIT
Calling Watch: 02 02 01 01 04 --
Rx Freq: 02187.5kHz
DSC STATUS display
DSC STATUS
CHANGE
WATCH
Distress Watch: 2 4 6 8 12 16 MHz
Calling Watch: 2 2 1 1 4 -- MHz VIEW FREQ
Distress Frequency: 2187.5kHz DIST. FREQ
Return to DSC screen
Move cursor
Freq. up
Freq. down
STATUS
Cursor
Active calling watch frequencies.
0404
9
DSC Display Operation
Receiving an Individual DSC Call
When calling watch is on, your MF/HF set is constantly scanning the
selected DSC channels for incoming DSC calls.
Lift the handset and
press PTT to connect
to the caller.
OR
Press VIEW to read out the call.
Press ABORT to return to TEL screen.
Lift HANDSET to connect
Individual
call received
VIEW
ABORT
FROM: 219000012
Press MORE to view the second part of call.
CALL CONTENT
Time 10:55:00 13 Okt 97
TYPE: Individual
FROM: 219000012
CAT.: Routine
ACKN: Request MORE
Press CONNECT to transmit and set channel.
Press CHANGE to change the acknowledgement.
Select CONNECT CONNECT
to reply call
COMM: SSB telephony CHANGE
MSG.: No Info
AD.: Freq. RX 2053.0 TX 2053.0 CANCEL
AGAIN
Select send to transmit SEND
TYPE: Individual
TO : 219000012
COMM: SSB telephony
AD.: Freq. RX 2053.0 TX 2053.0
ACKN: Reply CANCEL
Press SEND to transmit the reply.
Take the handset and start talking.
> Rx 2053.0 kHz
Tx 2053.0 kHz
CH
TX
MODE
SSB TELEPHONY TUNE<
SIGNAL CLRF
POWER HIGH SQUELCH OFF | | | | | RF-G
10
Receiving DISTRESS Call
When switches on your MF/HF set is constantly scanning all DSC
distress channels for incoming DSC distress calls.
DISTRESS
Rx/Tx 2182.0 kHz
AM TELEPHONY SIGNAL
POWER HIGH SQUELCH OFF | | | | |
CH
FREQ
MODE
BAND
Press VIEW to read out the call.
Press ABORT to return to TEL screen
Distress
call received
VIEW
ABORT
FROM: 21900100
Press MORE to view the second part of call.
CALL CONTENT
Time: 08:55:00 22 Sep 97 .
TYPE: Distress
FROM: 219001000
MSG.: Fire
Received on 2187.5 kHz MORE
If the ship in distress is within a reachable distance press “2182” and
listen to the subsequent information.
Press ACK/REPLY to send distress acknowledgement or distress relay.
In these menus there is a security that makes it impossible to send an
acknowledgement by mistake.
Press SETUP to return to the TEL screen with the appropriate radio
distress frequency, in this case 2182 kHz.
Press AGAIN to view the first part of call.
CALL CONTENT ACK/REPLY
SET UP
N: 57°01 E:009°52
Time 09:58 UTC CANCEL
COMM: SSB Telephony
AGAIN
11
Calling a SHIP
Press Tx CALL
You first see the messages “Call in progress” and then “Waiting for
acknowledgement”
Wait for answer
If the ship answers, see page 8 Receiving an Individual DSC call.
Key in the nine digit MMSI number of the wanted ship.
Select a SHIP call.
Select type
of call:
SHORE
SHIP
DISTRESS
MORE
The current telephony frequency is included in the call, and this
frequency is used as working frequency for the following radio
communication.
Accept the number.
A sub menu where a pre-programmed ship can be selected.
Key in the ship ACCEPT
MMSI number
<
MEMORY
TYPE: Individual
TO : 210215456 CANCEL
Select DSC frequency ACCEPT
CANCEL
Rx 2177.0 kHz
Tx 2177.0 kHz
Select the frequency on which the call is transmitted.
Select SEND to transmit the call.
Select send to transmit SEND
TYPE: Individual
TO : 210215456
COMM: SSB telephony
AD.: Freq. RX 2053.0 TX 2053.0
ACKN: Request CANCEL
12
Calling a SHORE Station
Press Tx CALL
You first see the messages “Call in progress” and then “Waiting for
acknowledgement”
Wait for answer
If the coast station answers see page 8 Receiving an Individual DSC call.
If the SHORE station supports the possibility of including
a telephone number, the telephone number can be k eyed
in followed by ACCEPT.
Select SEND to transmit
the call.
Select send to transmit SEND
TYPE: Individual
TO : LYNGBY
AD.: No info
ACKN: Request CANCEL
Select DSC frequency ACCEPT
CANCEL
Rx 8049.0 kHz
Tx 8049.0 kHz
Select the frequency on
which the call is transmitted.
Select ACCEPT to make a call directly to the shore station and talk with a
person there if no phone number is keyed in.
Select TEST CALL to make a test call to the coast station.
Key in the ACCEPT
phone number
<
TYPE: Individual TEST CALL
TO : LYNGBY
_ CANCEL
Accept the number.
A sub menu where a preprogrammed station can be selected.
Key in the coast ACCEPT
station MMSI number
<
MEMORY
TYPE: Individual
TO : 002191000 CANCEL
Select a SHORE call.
Select type
of call:
SHORE
SHIP
DISTRESS
MORE
Key in the nine digit MMSI number of the wanted coast station.
Note that when calling a coast station, it is always the
coast status that selects the working frequency for the
following communication.
13
Address Book
This MF/HF set is designed with self explaining menues.
The four soft keys on the right side of the display refer to the display
text.
Open the addr book menu.
One step back.
Go to the first screen on the same subject.
Select ADD to
make a new call
ADD
DELETE
CANCEL
AGAIN
Accepts the data.
Go to the next screen on the same subject.
Lower left side of the
display is the data area.
Right side shows the
function of the soft keys.
Upper left side of the
display is used for
text instructions
Use ^, or keyboard ACCEPT
to search in addr book
Ms Sunrise NAME
TO : 219222222
MSG : No info MORE
^
14
Using T wo Control Units
You can connect two control units to the system. However, it can
only be controlled by one control unit at a time.
Priority of Control Unit #1
Control unit #1 has the highest priority, i.e. you can always control
the system by means of control unit #1 – even if control unit #2 has
initiated a distress call.
Control Unit #2 Taking Over the Control
When control unit #1 is in the DSC Status Menu, control unit #2 can
take over the control of the system by leaving the DSC Status Menu.
When control unit #2 returns to the DSC Status Menu, the control is
automatically given back to control unit #1.
Status Indication
Control Unit #1:
When control unit #2 controls the system, the display of control unit
#1 shows what activity is taking place. The following read-outs may
appear:
• ”
OCC by unit 2 sending Distress alert
” means that control
unit #2 is transmitting a distress call, or awaiting automatic
retransmission.
• “
OCC by unit 2 sending DSC call
” means that control unit #2
is transmitting an ordinary DSC call.
• “
OCC by unit 2 using DSC functions
” means that control unit
#2 is in a DSC menu without transmitting a call.
• “
OCC by unit 2 using Radio functions
” means that control
unit #2 is not in a DSC menu.
Control Unit #2:
The display of control unit #2 always shows when the system is
busy. When the system is not busy, the display shows the DSC
Status Menu.
If control unit #2 tries to take over the control, but is not allowed to do
so, this is indicated by both a sound and the display read-out “
OCC
by unit 1
”.
Responding to Incoming DSC Calls
When a call comes in, only the active control unit – i.e. the one that
controls the system at the moment – is to respond.
If for instance control unit #2 has sent an individual DSC call, control
unit #2 is to receive and respond to the acknowledgement call that
may follow.
If a call comes in when both control units are in the DSC Status
Menu, and therefore not active, both control units are to receive and
respond to the call.
Power On/Off By Control Unit #2
Power On
You can turn on the whole system by means of control unit #2. If the
display shows the words “
Unit switched off
”, and the on/off button is
pressed, what happens depends on whether or not control unit #1 is
controlling the system at the moment:
a) If control unit #1 is controlling the system, this will be
indicated by the display of control unit #2.
b) If control unit #1 is not controlling the system, control unit #2
will start up in the DSC Status Menu.
When the whole system is off, it makes no difference which control
unit turns it on.
Power Off
You cannot turn off the whole system by means of control unit #2.
When you press the on/off button, only control unit #2 is turned off.
The display will then show the words “
Unit switched off
”.
Interconnecting
When you have received a DSC call, including working frequency, it
is possible to transfer the system control from control unit #1 to
control unit #2. To do so, in the Frequency menu, key: “
Shift
” + “
INT-
C/InterCom
”.
When a DSC call is transferred from control unit #1 to control unit #2,
the right working frequencies are maintained.
If the handset of control unit #2 is not lifted within five minutes, the
control automatically returns to control unit #1.
DSC Scanning Frequencies
You cannot change the DSC scanning frequencies by means of
control unit #2. The scanning frequencies used when in the DSC
Status Menu of control unit #2 are the same as if in the DSC Status
Menu of control unit #1.
If control unit #1 changes the DSC scanning frequencies, that
information is passed on to control unit #2. Therefore, if control unit
#2 is given the control, and starts scanning, the same scanning
frequencies are used.
15
Type of call Address O ptions Other data tran s mitted Telecom 1 Ackn.
SHORE Shore:
001234567 No info: Call shore station R outine - SSB telephony - No Info Yes
Shore →Phone:
or from
ADDR.BOOK
98765432: Call Phone No.
Test call
Routine - SSB telephony - <Phone num ber>
Safety - Te s t - N o info
Yes
SHIP
123456789 (none) Routine - SSB telephony - No Info - Work
frequency
Yes
LAST CALL
Repeat the last call made.
DISTRESS
UNDESIGNATED
DISABLE
SINKING
LISTING (CAPSIZE)
GROUNDING
COLLISION
FLOODING
FIRE
ABANDONING
PIRACY
MAN OVER BOARD
EPIRB
Position
UTC time fo r position
... to be entered manually if not obtained from
e.g. a GPS.
SSB telephony
AM telehony
FEC
?
EXTENDED
(See next page)
Advanced DSC Calls
Extended DSC calls make it possible for you to control the call
completely within the international rules, including the possibility of
sending data or fax from optional equipment connected to your MF/
HF set.
To start an extended call, select EXTENDED as the ‘Type of call’ in
the Tx menu below, and then continue in the Extended calls menu on
next page.
If you have selected an INDIVIDUAL Ship, GROUP, or Group AREA
call, all your options are the same after having selected the address.
Please observe the international rules for the rights to forward
DISTRESS RELAY calls.
Tx menu. Enter correct data instead of examples shown in
italics
::
16
EXTENDED Tx call started from “EXTENDED” in the table on the previous page. Enter correct data instead of examples shown in
italics
:
MMSI address rule:
Shore station numbers start with 00, group numbers start with one 0, ship numbers start with a digit 1-9.
Type of call Address Options Category Telecom 1 Telecom 2 Add. msg. Ackn.
INDIVIDUAL Shore:
001234567 No info: Call shore station Routine SSB telephony No info Yes
Shore phone:
98765432: Call Phone No. Routine SSB telephony No info
Ship:
123456789 SSB telephony No info No info Yes
GROUP
012345678 AM telephony MEDICAL Position No
G.AREA
N:57° d02° POLLING AIRCRAFT Work.
frequency
W:009° d03°No info
FAX
ARQ
FEC
TTY RX
TTY
TAPE
MORSE
SHIP
POSITION
No info
The data in the example
gives the area:
N:55..57°
W:6..9°
ROUTINE
URGENCY
DISTRESS
SAFETY
BUSINESS
DATA V21
V22
V22 BIS
V23
V26
V26 BIS
V26 TER
V28 TER
V32
Unable to
comply
No reason
Congestion
Busy
Queue
Station Barred
No operator
Temporary
engaged
Equipment
not
No channel
No mode
No info
ALL SHIPS
DISTRESS
SAFETY
URGENCY
Same as
above
Same as
above
Work.
frequency
No
DISTRESS RELAY Type of
address
Address Ship in
distress
Distressed
ship's MMSI
Distress
relay
As for
DISTRESS
As for
DISTRESS
As for
DISTRESS
ALL SHIPS All ships UNKNOWN in table Tx in table Tx in table Tx
INDIVIDUAL 001234567 KNOWN 123456789 Call Call Call
DISTRESS ACK Type of
address
Address Distressed
ship's MMSI
Distress
ack
As for
DISTRESS
As for
DISTRESS
As for
DISTRESS
ALL SHIPS All ships 123456789 in table Tx in table Tx in table Tx
Call Call Call
17
Changing a Function
There are a large number of function settings available, selectable
from a function tree, see the next page. This chapter only deals with
the principles of how to use the function tree.
An example:
Changing the Display Contrast
Press SHIFT and FUNC to enter function menu.
Select function or
group of settings
USER
TELEPHONY
DSC
MORE
Select the USER functions.
Select type of
general user
functions
DISPLAY
SOUND
VERSION
MORE
Select DISPLAY.
Use ^, to change value
Contrast:
ACCEPT
CANCEL
Use ^ and v to change the contrast value.
6
^
18
The Function Tree
Options: System settings.
For authorized service personnel only.
Menu S ubm en u Level 1 Subm enu Le vel 2 Param eters
User Display Contrast 0 to 7. High Contras t = 7
Sound Earpiec e level Att enuation Level 0 - 15
Alarm level At tenuat ion Level 0 - 15.
Vers ion SW versions for all modules
Print DS C Printer On/ Off
Config HW c onfiguration
Menu S ubm en u Level 1 Subm enu Le vel 2 Param eters
Telephony CH Add Add new us er c h
Delete Delete user ch
View View ch
Protec t ion Read Transc eiver protec tion c odes
Test Self tes t TU module
Menu S ubm en u Level 1 Subm enu Level 2 Param eters
DSC MM S I The MMS I number of the unit
ACK N Aut o ac k n on request On/ Off
DSC F req Add Add new DS C c all/ receive freq
Delete Delete DSC c all/rec eive freq
View V iew DS C c all/ receive freq
Pos it ion Change A ut om atic if connec t ed to a G P S
Time Change A utom at ic if connec t ed to a GP S
Test DSC m odem s elf tes t
Language Change language if allowed
Menu S ubm en u Level 1 Subm enu Le vel 2 Param eters
St ation Add Shore Add new s hore s tat ion
Ship Add new s hip s tat ion
Delete Delete s tat ion
View / E dit View s t ations or E dit s t ations
19
GMDSS Radiotelex Terminal
Introduction
The GMDSS Radiotelex Terminal is an option used for handling
transmission/reception of telex messages over radio. The terminal
consists of a printer and a keyboard, connected to the transceiver
control unit which provides the interface to the DSC/telex modem
located in the transceiver unit. The keyboard is equipped with an
affixed template for function keys and indicator lamps.
The GMDSS Radiotelex Terminal was designed in accordance with
relevant IMO, ITU and ETSI recommendation/specifications and
has been approved for shipboard installations to be operating
within the Global Maritime Distress and Safety System.
It supports world-wide ship-to-ship, shore-to-ship and ship-to-shore
communication by utilizing the radiotelex protocols described in
ITU- Rec. 625 to overcome the deficiencies of the HF medium. In
case of two-way communication an ARQ (Automatic Repetition
reQuest) algorithm for error correction is thus used, and when
sending to more than one station an FEC (Forward Error Correction) algorithm is used.
To facilitate error detection the source text consisting of 5-bit telex
characters is coded to a constant weight (3/4 ratio of mark and
space bits) 7-bit code. In FEC mode the message is sent in time
diversity i.e. each character is sent twice with a time interval by
interleaving the original character stream with a delayed version of
itself. The receiving station thus has two chances to receive the
character correctly. If both are in error a ‘*’ is printed. FEC
broadcast calls are used for sending collective messages to
several stations simultaneously. A special class of FEC allows
selective calling by means of call codes. The message is transmitted in inverted format and only receiving stations with the correct
call codes will receive the message.
ARQ operation involves two stations. The information sending
station (ISS) sends the information in blocks of 3 characters and
listens in the interval between the blocks for an acknowledgement
character to be received from the information receiving station
(IRS) indicating whether or not the latter has detected any
erroneous character(s) in which case the block will be repeated by
the ISS. Both the stations involved in a communication session
may initiate an OVER sequence to change the direction of
information flow or a BREAK sequence to terminate the connection. The station which initiates the connection becomes the
‘master’ station by transmitting the call signal of another station
after going from ‘standby’ to ‘phasing’ state. The called station
becomes the ‘slave’. When it recognizes its own call signal it will
also leave ‘standby’ and enter ‘phasing’ state by transmitting an
appropriate control character. After having verified the other station’s
identity both stations will proceed to ‘traffic’ state and start exchanging messages. If the quality of the radio link deteriorates resulting in
a large number of block repetitions, both stations will automatically
advance to the ‘rephasing’ state, in which the ‘master’ station tries to
call the ‘slave’ again, as it did in the ‘phasing’ state, without any of
them terminating the connection now under re-establishment. Both 9
digit and 5/4 digit call signals are supported and the corresponding
switching between the new protocol (ITU-R M. 625) and the old ITUR M. 476 is automatically performed.
20
Keyboard Indicator Lamps
‘Standby’ Steady light indicates that the terminal is
ready.
Flashing light indicates that the printer is off
or out-of-paper or the modem is busy/
inhibited. Telex mode must be selected in the
frequency display of the CU.
‘Tx’ Steady light indicates that a radiotelex
transmission is in progress.
Flashing indicates phasing, rephasing
(‘Called’ diode flashes as well) or repetitions.
‘Called’ Steady light indicates that a radiotelex call
has been detected and reception is in
progress.
Flashing indicates rephasing (‘Tx’ diode
flashes as well).
Keyboard Function Keys
Select CH (F1): Sets the frequencies of the transceiver in
accord with the selection of ITU coast station
or ITU intership channel and the entry of ITU
channel number.
Call FEC (F2): Initiates an FEC transmission.
Responds to the printer with a choice of
broadcast or selective FEC. Selecting
selective FEC requires entry of call code,
before the transmission begins.
Call ARQ (F3): Initiates an ARQ call. Responds by printing
‘ARQ call code?’, expecting the call code of
the station to be called to be typed. Upon
carriage return (¬ Enter), the ARQ transmis-
sion begins.
Edit Mesg (F4): Edits a message to be transmitted later.
Send Mesg (F5): Transmits (prints in Standby) the edited
message.
WRU (F6): Requests the other station to transmit its
answer-back code.
DE (F7): Transmits own answer-back code, see
Modem Set-up also.
Over (F8): Changes the direction of an ARQ connection.
Break (F9): Terminates a connection.
Responds by printing ‘Breaking connection’.
If pressed during transmission of an edited
message this is terminated. Press once more
to terminate the connection.
On/Off (F10): Switches the GMDSS telex On/Off. The
‘Standby’ keyboard indicator lamps gives out
steady light when the switch on process is
finished. Call codes and abbreviated ID are
printed.
2174.5 kHz (Ctrl+F1) Selects the distress frequency 2174.5 kHz.
4177.5 kHz (Ctrl+F2) Selects the distress frequency 4177.5 kHz.
6268 kHz (Ctrl+F3) Selects the distress frequency 6268.0 kHz.
8376.5 kHz (Ctrl+F4) Selects the distress frequency 8376.5 kHz.
12520 kHz (Ctrl+F5) Selects the distress frequency 12520.0 kHz.
16695 kHz (Ctrl+F6) Selects the distress frequency 16695.0 kHz.
Bell (Ctrl+F7) Transmits Bell character.
21
Switching On
Press F10 and switch on the printer (The ‘Select’ printer indicator
must be on). Select telex mode in the Frequency Display of the
control unit. If the modem is used for DSC or is inhibited because the
transceiver is used for telephony, the Standby keyboard indicator
lamp is flashing to indicate that the terminal is not ready.
The ‘Standby’ keyboard indicator lamp shines steady light when
connection to the telex modem is established and the following text
appears on the printer (example):
5-digit call code: 12345
MMSI number: 123456789
Abbreviated ID: abcd
Channel Selection
Press F1. The printer responds by printing:
‘ITU Coast station / interShip channel (C/S)?:
After pressing ‘C’ or ‘S’ as desired the channel number is requested
and must be typed in. The validity of the channel number is checked.
If the channel number does not exist this is indicated.
If the channel number exists the corresponding frequency pair is
printed and the transceiver is set accordingly.
The radiotelex
distress and safety
frequencies may be selected by
simultaneously pressing ‘Ctrl’ and the appropriate function key F1 to
F6.
Transmitting a Message
Before calling, it must be ensured that the transmission will not
interfere with transmissions already in progress. Switch the loudspeaker on and listen in on the selected channel.
Press
Call FEC
or
Call ARQ
as desired and enter the call code of the
station to be called. For transmission to two or more stations the
FEC mode should be used. For communication between two stations
the ARQ mode should be used.
Before any message can be sent, wait until the connection has been
established, or in the case of FEC until the opening phase sequence
has been transmitted. When the system is ready for message
transmission a “>” is printed and the Tx keyboard indicator shines
steady light.
After a successful ARQ connection has been established, answerback codes may be exchanged by pressing the
WRU
and DE keys. A
message may now be transmitted by pressing carriage return (¬
Enter) followed by the message to be transmitted, either typed in
directly from the keyboard, or recalled from the text memory by
pressing the
Send Message
key. Communication with coast stations
must be in accordance with the procedures specified by the particular coast station. Where the appropriate facilities are provided by the
coast station, traffic may be exchanged with the land telex network.
Having completed the transmission, an exchange of answer-back
codes should take place. The radio connection is terminated by
pressing the
Break
key.
Editing a Message
A text memory is used for storing a message for later transmission.
The message can be transmitted one or more times. The message is
printed out when the
Send Message
key is pressed.
A message can be entered into the text memory after pressing the
Edit Message
key in standby mode. Any previous contents of the
text memory are printed out then and may be supplemented,
corrected or deleted.
Editing keys:
Edit Mesg(F4)
Selects edit-mode and prints the contents of
the text memory.
Backspace
Deletes the last character keyed in if it has
not been printed.
Insert
followed by line number, selects a line.
The contents of the line, if any, are printed.
Text may be added or deleted.
Delete
Deletes the last word of the line
Deletes message (after confirmation) if
pressed after
Edit
(F4).
Line numbers (10, 20, etc.) are added automatically when typing the
message.
22
Receiving a Message
Reception is possible whenever the terminal is on, indicated by
steady light in the ‘Standby’ keyboard indicator. The radio must be
set to telex mode and to the desired working channel.
When a call is detected the ‘Call’ keyboard indicator lamps turns on.
In case of paper-out during reception the connection is terminated.
Installation and Initial Set-up
Printer
The terminal uses an OKI Microline 280 parallel interface dot-matrix
printer with roll paper stand, please refer to the operation guide
delivered with the printer. The printer should be connected to the
printer socket at the rear of the control unit by means of the parallel
interface cable included with the printer. The printer is equipped with
a special firmware which allows the paper to be scrolled up so the
current line can be read in printing pauses, and scrolled back down
when printing continues. The firmware version can be checked by
performing a selftest: Disconnect the parallel interface cable. Press
the LF button (line-feed) while switching the printer on. When light
comes on in the indicator lamps, release the LF button. The printer
version is now printed followed by a test print-out. The version must
be: F/W 01.01 S33-67-7145.
Keyboard
The keyboard is a Cherry 1800 PC/AT compatible keyboard. The
self-adhesive keyboard template delivered with the equipment must
be mounted on the keyboard: Remove the protective paper. Carefully place the template around the function keys and indicator lamps
so the latter are fully visible.
Modem Set-up
Modem set-up mode is selected automatically when turning the
GMDSS telex on if no call codes are valid or if the abbreviated ID is
not valid. To change a valid set-up, a factory resetting of the modem
must be performed.
The 5-digit call code, the MMSI number and the abbreviated ID
allocated to the station may then be entered in turn. To leave a
setting unchanged just press ‘¬ Enter’. Otherwise key in a new
setting and press ‘¬ Enter’. The next item is then printed. After the
last item follows:
Accept settings (Y/N) ?
The process may be repeated if ‘N’ is pressed; the modem set-up
mode is left if ‘Y’ is pressed.
The answer back of the modem is generated by combining the 5-digit
call code or MMSI number, the abbreviated ID and an ”x” e.g.:
12345 abcd x
or
123456789 abcd x
23
Example of FEC Transmission
Assuming the GMDSS telex terminal is in Standby and the radio is
set up to telex mode and to the desired frequencies following a DSC
Distress alert call, proceed as follows:
Press
Call FEC
. The printer responds by printing:
Broadcast FEC or Selective FEC (B/S)?
Press the ‘B’ key. The printer responds by printing:
Broadcast FEC call 1997-10-05 12:30:23, Tx 2174.5 kHz
The transmission starts, the ‘Tx’ keyboard indicator starts flashing
and the control unit display indicates that the transmitter is delivering
RF output to the aerial. When the phasing sequence (including
carriage return, line feed, letter shift) has been transmitted the ‘Tx’
lamp shines steady light and the printer responds by printing:
>
The communication to follow must be in accordance with the
procedures specified for distress traffic and contain:
• the distress signal ‘Mayday’;
• the words ‘this is’;
• the 9-digit identity and call sign or other identification of the
ship,
• the ship’s position if not included in the DSC distress alert;
• the nature of distress;
• any other information which may facilitate the rescue.
The connection is terminated by pressing the
Break
key. After a few
seconds transmission stops, the Standby keyboard indicator lamp
goes on and the terminal is ready to receive.
Example of ARQ Transmission to a
Coast Station
When the GMDSS telex terminal is on, indicated by the ‘Standby’
keyboard indicator lamp, and the radio is set up to the desired
working channel (and, if requested by the coast station, free signal
can be heard in the speaker), press the
Call ARQ
key .
The printer responds by printing:
Enter ARQ call code:
Type in the call code, e.g.: 0832
If ok, press carriage return (<- Enter), (otherwise press
Call ARQ
again).
The printer responds by printing:
ARQ 0832 call, 1997-10-05 12:45:10,
The transmission starts, the ‘Tx’ keyboard indicator lamp starts
flashing and the control unit display indicates that the transmitter is
delivering RF output to the aerial. When successful connection has
been established the ‘Tx’ keyboard indicator lamp shines steady light
and the printer responds by printing:
>
The exchange of answer-backs is initiated by the coast station. The
answer-back code of the called station is printed:
0832 AUTOTX DK
followed by a go ahead indication and a traffic direction change:
GA+?
If direct connection with a land telex subscriber is wanted, type:
dirtlx54321+
where 54321 is the telex number of the subscriber. The coast station
responds with:
MOM
Dialling follows automatically, and simultaneously the number
selected is sent to the ship:
54321
When the connection is ready, the time, answer-back, “via Lyngby
Radio” and “MSG+?” is sent:
97-10-5 12:46
54321 ZYXW VIA LYNGBY RADIO
MSG+?
24
Send own answer-back by pressing the DE key:
123456789 abcd x
The message is now transmitted by pressing carriage return (¬
Enter) followed by the message to be transmitted, either typed in
directly from the keyboard, or recalled from the text memory by
pressing the MESSAGE key:
this message is typed in directly from the keyboard
or recalled from the text memory.
Having completed the transmission, the answer-back code of the
subscriber is requested by pressing the
WRU
key:
x
54321 ZYXW
and own answer-back is sent by pressing the
DE
key:
123456789 abcd x
To disconnect the land line type:
kkkk
The coast station responds with:
Time: 97-10-5 12:48
Ship: 123456789 ABCD X
Subscr: 54321
Duration: 1.3
GA+?
A new land line connection may be made or the radio connection
terminated by pressing the
Break
key. After the end-of-communication procedure the transmission stops and the ‘Tx’ keyboard indicator
goes off.
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