Operating Manual Bearing System RT-300

Operating Manual
Bearing System RT 300
Operating Manual
Bearing System RT-300
2-Band Precision Bearing System
Issue:2005/09/27-Rev.01_01
Page 1 of 72
Operating Manual
Bearing System RT 300
Edited by:
RHOTHETA Elektronik GmbH
Neuegling 7
D-82418 Murnau
Germany
Email: email@rhotheta.de
Homepage: www.rhotheta.de
Copyrights © RHOTHETA Elektronik GmbH
All rights reserved
[Issue: 2005/09/27-Rev.01_01]
HINT
The manufacturer reserves on making modifications at any time and without previous
information of the here described product.
Issue:2005/09/27-Rev.01_01
Page 2 of 72
Operating Manual
Bearing System RT 300
Table of Content
1 GENERAL INFORMATION
1.1
7
Purpose of Use
7
1.1.1
Mobile Use
7
1.1.2
Stationary Use
7
1.2
Content of Delivery
7
1.3
Front View DCU (Display Control Unit)
8
1.4
Brief Summary DCU
8
1.5
Rear View DCU
10
2 TECHNICAL DATA
11
2.1
Electrical Characteristics
11
2.2
Mechanical Characteristics
13
2.2.1
DCU
13
2.2.2
Antenna
14
3 DISPLAY AND OPERATING
3.1
Display
15
15
3.1.1
LED-circle
15
3.1.2
General lighting
15
3.1.3
LC -Graphic-Display
16
3.1.4
Digital Bearing-value Display
16
3.1.5
Direction of reference
16
3.1.6
Display of Signal Level
17
3.1.7
Squelch-level
17
3.1.8
Frequency / Channel display
17
3.1.9
3.1.9.1
Status display
„ERROR“ Message
17
18
3.1.10
SCAN-display
18
3.1.11
”Selective Squelch” (only ELT)
18
3.1.12
Status Alarm Contact
19
Issue:2005/09/27-Rev.01_01
Page 3 of 72
Operating Manual
3.2
Bearing System RT 300
Operating the Bearing System RT 300
19
3.2.1
3.2.1.1
3.2.1.2
3.2.1.3
Switching On and Off, Key 1: On/Off
Switching On:
Switching Off:
External Switching On/Off
19
19
19
19
3.2.2
Switching the Band, Key 16 <Band>
19
3.2.3
Selection of Frequency / Channel, Key 15 <Channel / Frequ.>
20
3.2.4
3.2.4.1
3.2.4.2
Squelch Function, Key 14 <Squelch>
Common Remark
Adjusting the Squelch
20
20
21
3.2.5
Volume Key 5 <Vol.+> and 10 <Vol –>
21
3.2.6
3.2.6.1
3.2.6.2
„Selective Squelch“, Key 4 <ELT only>
Common Remark
Activating / Deactivating „Selective Squelch“
22
22
22
3.2.7
3.2.7.1
3.2.7.2
Scan function Key 12 <Scan>
Common Remarks
Scanfunktion Activating / Deactivating Scanning Function
23
23
23
3.2.8
Function Repeat Key 3 <Repeat>
23
3.2.9
Funktion Live Key 8 <Live>
24
3.2.10
Function Clear Key 9 <Clr>
24
3.3
The Menu
25
3.3.1
The Menu Structure
26
3.3.2
The Main Menu
Menu LIGHT/LCD
Adjusting brightness of LC- display: Function DIM LCD
Adjusting Brightness of Kkeyboard lighting: Function DIM LEGEND
Adjusting brightness of LED-circle: Function DIM CIRCLE
Adjusting contrast of the LC-display: Function LCD CONTRAST
Menu: BEARING
Selecting bearing reference direction: Selecting Function BEARING
30
Display Bearing Parameters: VIEW BEARING SETUP
Menu: INFO
INFO Beacon
INFO Receiver
INFO DCU (Display Control Unit)
INFO Statistics
Menu: SOUNDS
27
28
28
29
29
29
30
3.3.2.1
3.3.2.1.1
3.3.2.1.2
3.3.2.1.3
3.3.2.1.4
3.3.2.2
3.3.2.2.1
TYPE
3.3.2.2.2
3.3.2.3
3.3.2.3.1
3.3.2.3.2
3.3.2.3.3
3.3.2.3.4
3.3.2.4
Issue:2005/09/27-Rev.01_01
Page 4 of 72
33
33
33
34
34
34
35
Operating Manual
Bearing System RT 300
3.3.2.4.1
Adjusting Key Volume: Function BEEP VOLUME
3.3.2.4.2
Adjusting Volume Alarm Signal: Function ALARM VOLUME
3.3.2.5 Menu SETUP
3.3.2.5.1
SETUP Menu BEARING
3.3.2.5.2
SETUP Menu RECEIVER
3.3.2.5.3
SETUP Menu: SERIAL
3.3.2.5.4
SETUP Menu: COMPASS
3.3.2.5.5
SETUP Menu: OTHER
3.3.2.5.6
SETUP Menu: FACTORY RESET
3.3.2.6 MENU: SERVICE
3.3.2.6.1
Service menu: BEARING
3.3.2.6.2
Service menu: RECEIVER
3.3.2.6.3
Service Menu: DCU
3.3.2.6.4
Service Menu: COMPASS
3.3.2.6.5
Service menu: REBOOT
35
35
35
36
41
43
46
52
54
55
56
56
57
57
58
3.4
58
Special Functions
3.4.1
Locking / Unlocking the Setup Menu
58
3.4.2
Resetting Brightness and Contrast Adjustment of Display
58
3.4.3
Loading Firmware Updates
58
3.5
Interfaces
59
3.5.1
Antenna connector on DCU:
59
3.5.2
3.5.2.1
3.5.2.2
3.5.2.3
3.5.2.4
3.5.2.5
Power Connector
Power supply
External speaker
Alarm contact
Extern Input
Analog Test
59
60
60
60
60
61
3.5.3
3.5.3.1
3.5.3.2
3.5.3.3
Interface Connector
RS-232-Interface
RS-485-Interface
NMEA (RS-422) Interface
61
62
62
62
4 INSTALLATION AND PUTTING INTO OPERATION
4.1
Installation of Display-Control-Unit DCU
63
63
4.1.1
DCU Installing Cut-out
63
4.1.2
Connecting power supply
64
4.1.3
Connecting the DCU to Ground
64
4.1.4
Connecting Antenna
64
Issue:2005/09/27-Rev.01_01
Page 5 of 72
Operating Manual
Bearing System RT 300
4.2
Determination of Antenna Position
64
4.3
Completing Antenna Cable
66
4.3.1
Type of cable
66
4.3.2
Connecting Pattern of Antenna Cable:
66
4.4
Installing the Antenna
68
4.4.1
Fixing Screw Joint on Mast Tube
68
4.4.2
6-holed Mast Flange
68
4.4.3
Installing Antenna Cable with Pull-relief
68
4.4.4
Fixing the antenna
68
4.4.5
Aligning Antenna for Mobile Use
69
4.4.6
Aligning Antennafor Stationary Use
69
4.4.7
Mounting of Antenna Beams
70
4.5
Configuring Setup
70
5 APPENDIX
5.1
72
Wiring pattern (Recommended RT 300 DCU Connections Plan)
Issue:2005/09/27-Rev.01_01
Page 6 of 72
72
Operating Manual
Bearing System RT 300
1 General Information
1.1 Purpose of Use
1.1.1 Mobile Use
The RT-300 Bearing System allows bearing of radio signals (radio telephony) in the
maritime band as well as bearing of signals on the international VHF distress frequency
(121,500 MHz). For training purposes a whole frequency range of the airband (118,800 ...
124,000 MHz) is tunable.
Integrating a communication bearing system for coastal and maritime radio stations and a
professional SAR-bearing system, the RT 300 Bearing System allows quick bearing and
detecting of EPIRB equipped persons or vessels.
Especially designed for use under rough circumstances on sea vessels the system is
extremely compact. The antenna and the display control unit are waterproof. The most
sensitive receiving system allows bearing of weakest signals.
Caution:
The bearing system RT 300 is not approved for primary navigation purposes.
1.1.2 Stationary Use
As a traffic bearing system the RT 300 has a wide range of use., e.g. surveillance of
coastal shipping traffic as well as alerting rescue crews in case of accident.
1.2 Content of Delivery
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1
1
1
1
1
8
1
1
4
4
4
1
1
1
Operating Manual
Display Control Unit DCU
Antenna head
Mast fastener
Reduction mast flange 50 to 40 mm
Antenna beams
Antenna cable
Spare fuse (1A inert)
Fixing bolts M4x30 DIN 912
Washers M4
Nuts M4
Power supply cable including fuse holder
Test protocol
Mounting sketch for DCU installing cut-out
Issue:2005/09/27-Rev.01_01
Page 7 of 72
Operating Manual
Bearing System RT 300
1.3 Front View DCU (Display Control Unit)
1
2
3
4
5
6
7
16
8
9
15
14
13
12
11
10
Fig. 1: Front view
1.4 Brief Summary DCU
Pos. Designation
01
Function
see chapter
Switching on and off the bearing system
3.2.1
indicates RB (RB = relative bearing). resolution 10°
Repeat: bearing mode, indicates last bearing value
during signal pauses
←
: - in menu-mode: moves selecting field to the
left
- in adjusting mode: sets value to minimum
- in frequency / channel selecting mode:
moves decimal to the left
Bearing-mode: activating of „selective squelch“.
(bearing and alerting functions will only be working
if ELT modulation is recognized). Function only
available in airband.
Vol. + : in bearing mode: increases audio-volume
↑
: - In menu-mode moves selecting field
upwards
- in adjusting-mode:increases value for one
step
3.1.1
3.2.8
Key:
02
03
LED-circle
Key:
04
Key:
05
Key:
confirms input or selection
06
Key:
Issue:2005/09/27-Rev.01_01
Page 8 of 72
3.2.6
3.2.5
Operating Manual
Pos. Designation
07
Bearing System RT 300
Function
see chapter
call-up menu or leaving menu
Fehler!
Verweisquelle
konnte nicht
gefunden
werden.
3.2.9
Key:
08
Key:
09
Key:
10
Key:
11
12
13
Speaker
Key:
LC-Display
14
Live : in bearing-mode: displaying unaveraged
bearing values, if key is pressed,
→ : - in menu-mode: moves selecting field
upwards.
- in selecting-mode: increases value to
maximum
- in frequency-/ channel-selecting-mode:
moves decimal to the right
Clr
: in bearing-mode: cancelling bearing
3.2.10
average store
Esc
: in selecting-mode:jumps to next higher level
in adjusting-mode: ignores last not
confirmed input and jumps to next higher
level
Vol. - : in bearing –mode: decreases audio volume 3.2.5
↓
: in menu-mode: moves selecting field
downwards
: in adjusting-mode: decreases value for one
step
internal speaker output
in bearing-mode: activating and de-activating of
3.2.7
scan-function (confirming with <OK>).
Depending of operating mode display of following
information:
bearing mode:
- bearing value
- reference direction
- signal strength
- squelch threshold
- active frequency / channel
- status report
- time since last bearing
- scan function
“selective squelch“ (ELT only)
selecting-mode: - Menu
(Menu)
- menu level
adjusting-mode: - adjusting range / menu
- limit values
- active buttons
activates squelch adjusting mode
3.1.3
3.1.7
Key:
15
activates mode for channel selection (maritime radio 3.2.3
band or frequency selection (air band)
Key:
16
change-over between maritime radio band and air
band
Key:
Issue:2005/09/27-Rev.01_01
Page 9 of 72
3.2.2
Operating Manual
Bearing System RT 300
1.5 Rear View DCU
c
d
e
f
g
h
Fig. 2
Pos.
c
d
e
f
g
h
Designation
Type plate
Antenna connector
Ground (Gnd)
Interface connector
Power supply connector
Ventilation
Issue:2005/09/27-Rev.01_01
Page 10 of 72
Operating Manual
Bearing System RT 300
2 Technical Data
2.1 Electrical Characteristics
Designation
Bearing principle
Value
Doppler
Direction of bearing
reference, digital display
- relative
- QDM
- QUJ
relative
Direction of bearing
reference
LED-circle
bearing error
< ± 5°
In undisturbed wave field,
sufficient fieldstrength
assumed, signal without
modulation.
Resolution
Digital display
LED-circle
LC-graphic-display
1°
10°
98x32 dots
Sensitivity
Airband:
Frequency range
Maritime radio band
Airband
Channel pattern
Bearable types of
modulation
Polarisation
Polarisation error
Garbling cone
time of response
156,0 .. 162,1 MHz
118,8 .. 121,5 .. 124,0 MHz
25 KHz
A3E; F3E, A2X (ELTmodulation)
vertical
≤ 5°
ca. 30° to the vertical
≤ 300 ms
Audio-output
operating temperature
range
Issue:2005/09/27-Rev.01_01
Remarks
3 kHz rotational frequency,
delay time compensation
- to antenna direction
- relative to megnetic Nord
- relative to geographic Nord
- to antenna direction
# 200 nV/m*
# 350 nV/m**
Maritime Band:
# 300
nV/m*
# 900 nV/m**
max. 1,5 W at 4 Ohm.
(Uss-max =10V)
DCU: -20° .. +60° C
AU: -40° .. +60° C
Page 11 of 72
brightness and contrast
adjustable
* at max. variation of bearing
value of "20° and after 20 s
of averaging time.
** at max. variation of bearing
value of "5° and after 3 s of
averaging time
- signal of transmitter without
modulation
Channel 1(ship) – 88 (coast)
bearing largly independent of
type of modulation
at 60° rotation of field vector
depending on field strength of
signal.
at low temperatures running in
time up to 5 minutes
Operating Manual
Designation
Range of operating
voltage
Current consumption
Bearing System RT 300
Value
12 .. 28 Volt DC
at 12V DC voltage supply:
350 mA (4,8 W)
400 mA (5,4 W)
450 mA (5,4 W)
600 mA (7,2 W)
800 mA (9,6 W)
at 24V voltage supply:
250 mA (7,0 W)
300 mA (8,4 W)
350 mA (9,8 W)
400 mA (11,2 W)
600 mA (16,8 W)
Issue:2005/09/27-Rev.01_01
Page 12 of 72
Remarks
-
standby
typ. without ext. speaker
max. without ext. speaker
typ. with ext. speaker
max. with ext. speaker
- standby
- typ. without ohne ext.
speaker
- max. without ext. speaker
- typ. with ext. speaker
- max. with ext. speaker
Operating Manual
Bearing System RT 300
2.2 Mechanical Characteristics
2.2.1 DCU
220
210
24.8
192
19.8
58.85
5.5
105
16
17.86
80
113
M5
26
D-Sub connector female
D-Sub connector male
30.44
ø4.5
R5
R8
45°x1
rubber sealing
192
Fig. 3
Weight: ca. 700 g
Dimensions: see Fig. 3
Protection of housing: IP 67
Issue:2005/09/27-Rev.01_01
Page 13 of 72
Operating Manual
Bearing System RT 300
2.2.2 Antenna
Weight: ca. 1300 g
Dimensions: see Fig. 4
Protection of housing: IP 671
Antenna beams: 8 pcs. (4 dipoles)
The mast flange 2 can be changed by
loosening the 6 domed nuts 1.
Caution:
Warranty is expiring if opening the
antenna.
The bearing antenna is available with 2
different antenna flanges:
1. Threaded flange (see Fig. 6)
2. 6-hole flange (see Fig. 5)
1
2
3
Fig. 4
75
60
12
19
ø42
ø40
ø50
G2 1/4´´
ø75
Fig. 5
1
Fig. 6
sealed housing flange (e.g. if using pull-relief 3)
Issue:2005/09/27-Rev.01_01
Page 14 of 72
38
60
33
ø6.4
Operating Manual
Bearing System RT 300
3 Display and Operating
Common:
All display and operating elements are situated on the front of the Display-Control-Unit
(DCU).
3.1 Display
x
LED circle
general lighting
status display
display
frequency - channel
scan display
level digital
direction of reference
level analog
digital bearing value
"selective squelch“
status of alarm-contact
squelch-level
Fig. 7: Display
3.1.1 LED-circle
Corresponding to a resolution of 10°, the LED-circle is made of 36 red LED`s.
The reference direction of he display is always relative to the bearing antenna and therefore
to the longitudinal axle of the vessel. The preset offset-value will be considered in the
display.
Brightness of the display may be adjusted in menu: LIGHT\ DIM CIRCLE.
Receiving a signal, the bearing value will be displayed with the corresponding LED. If the
signal isn`t received anymore for a certain time, the last bearing value will be displayed with
the corresponding LED flashing. This time may be adjusted in menu:
SETUP\BEARING\LAST_TIME.
3.1.2 General lighting
There are 4 green LEDs within the LED-circle as an orientating aid. They are placed in the
directions North, East, South and West.
The brightness of these green and red LEDs may be adjusted in menu: LIGHT\ DIM
CIRCLE.
Issue:2005/09/27-Rev.01_01
Page 15 of 72
Operating Manual
Bearing System RT 300
3.1.3 LC -Graphic-Display
The centered LC-Display is showing all relevant bearing data, adjustments and status
reports. Background brightness may be adjusted in menu: LIGHT\DIM LCD BACKL,
contrast in menu: LIGHT\LCD CONTRAST.
When adjusting, the range of adjustment will be displayed as well as the active keys and
their function.
In menu-mode all selecting fields and adjustments are displayed.
In bearing-mode the graphic display is divided into following fields:
3.1.4 Digital Bearing-value Display
Receiving a bearable signal, the
Indicating 28 secs
bearing value will appear in the
since last bearing
display`s lower left area with a
resolution of 1°. If there is no more
signal available, the display will start flashing for a certain
time, alternately showing in the display „LAST“ (adjustable in
menu: SETUP\ BEARING\ LAST_TIME). After that the
information, „last bearing“ will be shown for 10 min., indicating
the duration since the last bearing.
After 10 min without signal., three dashes are displayed.
Fig. 8
Fig. 9
3.1.5 Direction of reference
The selected direction of referencce is displayed left of the
digital bearing value. Following directions of reference may be
selected:
Fig. 10
Display
REL
MAG
TRU
Direction of reference Remarks
relative
bearing relative to longitudinal axis of antenna (North – South)
magnetic Nord
bearing relative to magnetic North
→ optional internal compass module required or
→ compass information via NMEA interface required, input of
variation(see 3.3.2.5.4.5.3)
true (geographic) North bearing relative to geographic North
optional internal compass module required or
→ compass information via NMEA interface required, input of
variation(see 3.3.2.5.4.5.3)
Issue:2005/09/27-Rev.01_01
Page 16 of 72
Operating Manual
Bearing System RT 300
3.1.6 Display of Signal Level
The present signal level is displayed as figures as well as a
analog bar graph. The display is not calibrated and is serving
as a qualitative measure.
Fig.. 11
3.1.7 Squelch-level
The small triangle on top of the bar graph (see Fig.. 11) is the selected squelch level. Is the
bar graph of the level-display left of the triangle, receiving is switched off.
3.1.8 Frequency / Channel display
The upper right area of the display is showing the present
working frequency or the present selcted channel in the maritime
band. A duplex channel selected, additional information is given:
“SHIP” for a maritime radio station (lower band) or „COAST“
(upper band) for the coastal radio station.
The
working frequency in the maritime band will be displayed, if
Fig. 12
option “CHANNEL MODE OFF” in menu
SETUP\RECEIVER\CHANNEL is selected.
3.1.9 Status display
The upper left area of the display is showing status information.
The bearing system is verifying continouosly different parameters
and signals. If everything is working correctly, the information “OK”
will be displayed..
If one or more parameters are leaving the permitted range of
values, a warning message or error message is displayed..
Fig. 13
A warning message is displayed, if working parameters are nearing
significantly close to the permitted limit value,or, if external bearing signals are not available
anymore. The system´s basic functions are not affected yet, but preventive measures are
recommended.
A warning is displayed in the status field with the letter „W“ followed by an error indicating
figure. After that a short characterization of the warning is displayed.
At warnings, indicating the lack of a required signal, the warning message is displayed
additionally as a text instead of the digital bearing value.
Following warning messages may be displayed:
Warning Short
designation
W1
U-DISP
W2
U-REC
W3
NO HEAD
W4
NO COMP
Issue:2005/09/27-Rev.01_01
Meaning
Voltage supply too low
Antenna voltage too low
No heading data available
No compensation of drag
error, selected data source
not available or faulty data
Page 17 of 72
Operating Manual
Bearing System RT 300
3.1.9.1 „ERROR“ Message
An error message is indicated, if one ore more operating parameters have left the permitted
range, or, if the internal electronics have detected a malfunction. In this case the bearing
system is out of order.
Following errors may be detected by the internal electronics:
Error
E1
Display message Meaning
Operating voltage in display too low
E2
Operating voltage in antenna unit too low
E3
- no antenna connected
- malfunctioning connection AU -DCU
- defective antenna
E4
E5
E6
BAD ANT
BAD DCU
PLL-LO
E7
E8
E9
PLL-SY
--
E10
Faulty data from antenna to DCU
Faulty data from DCU to antenna
frequency adjustment in receiver module not
working
synthesizer of receiver not working
Not in use now
frequency of received signal above permitted
range.
frequency of received signal under permitted
range.
3.1.10 SCAN-display
As soon as the scanning mode is activated, on the right hand side of the frequency display
the display „SCAN“ will appear (see Fig. 7 “scan display”). In the scanning mode, the
receiver will be switched to the distress frequency 121.500 MHz every 40 secs for a
duration of 10 secs, in order to receive transmitted distress signals. During this time the
message SCAN is displayed inverted, the frequency display is showing 121.500 MHz.
3.1.11 ”Selective Squelch” (only ELT)
The activated function “Selective Squelch” (only ELT) is indicated as „O-ELT“ beneath the
frequency display. (see also 3.2.6). If this function is activated, only transmitters in the
airband sending the normed ELT-sweep-tone will be received.
Issue:2005/09/27-Rev.01_01
Page 18 of 72
Operating Manual
Bearing System RT 300
3.1.12 Status Alarm Contact
If the function „ELT-PULS (MOB)“ in the menu: SETUP\OTHER\RELAY-MODE is selected,
the anchor symbol is indicating the recognized alarm and that the relay has made contact
one time. In order to release this function again, the bearing system has to be switched off
and on again. (see 3.3.2.5.5.1)
3.2 Operating the Bearing System RT 300
The bearing system can be controlled by using the 13 keys on the front of the DCU.
Functions needed for normal bearing operation can be called up directly by function keys.
Functions rarely to be changed or functions to be adjusted once during installation are
selected in the menu structure.
3.2.1 Switching On and Off, Key 1: On/Off
Using key 1 <On/Off> (see Fig. 1: ), you can switch on and off the device.
3.2.1.1 Switching On:
Pressing key 1 <On/Off> for at least 1 sec is activating the
device. For ca. 1,5 secs the display as shown in Fig. 14 will
appear . Now the system is ready to work. Depending on
previous menu adjustments the manufacturer´s defaults or the
last selected adjustments (setups) will be active.
Fig. 14
3.2.1.2 Switching Off:
Pressing key 1 <On/Off> is closing the system. This procedure will last 3 secs.. The LCdisplay will show “shutting down”.
3.2.1.3 External Switching On/Off
Separating the system from the power supply will close down the system automatically,
saving all adjustments automatically. The operating voltage applied again, the system is
returning to the last stage before shutting down. If the system was switched on before
separating from the operating voltage, it will be switched on after applying the operating
voltage. If it was switched off, it will remain switched off.
3.2.2 Switching the Band, Key 16 <Band>
The bearing system is able to receive and to bear frequencies in two different bands. So,
the standard version is covering the whole maritime band (156.00 ... 162,10 MHz) as well as
a certain frequency range in the air band (118.00 ...121.500 ... 124.00 MHz) where the
international distress frequency is located.
- Pressing key 16 <Band>, the menu for selecting the
frequency band will appear in the LC-display (see Fig. 15
and Fig. 16).
Fig. 15
Issue:2005/09/27-Rev.01_01
Page 19 of 72
Operating Manual
Bearing System RT 300
- Use keys 5 <+>, 10< ->, 3 <←> or 8 <→> to select one of
the two bands.
- The inverted band is selected.
- Use key 6 <Ok> to confirm the selection. The device is
returning into bearing mode.
- Is the selection to be rejected, use key 9 <Esc>. The
Fig. 16
device is returning into bearing mode, keeping the
previous adjustment .
- If the confirmation isn´t executed within 16 secs, the device is returning automatically into
the bearing mode, keeping the previous adjustment.
- In the third line the available frequency range is indicated.
- In the fourth line the active function keys are shown.
3.2.3 Selection of Frequency / Channel, Key 15 <Channel / Frequ.>
Selecting the operational frequency in the airband is usually
done by direct input, with an incremental width of 25 kHz.
In the maritime band each frequency has an assigned
channel number. Selecting the frequency in the maritime
band is usually done by putting in the desired channel
number. However, the direct frequency input in the maritime
band can be done as shown in menu: 3.3.2.5.2.
Fig. 17
Airband:
- After pressing key 15 <Channel / Frequ.> the „Set
Frequency“- window will appear on the display (see Fig.
17).
Fig. 18
- Keys 3 <←> and 8< →> are selecting the decimal, the
location is underlined.
- keys 5 <+> and 10 <–> are increasing resp. decreasing the corresponding value. Inputs
will be accepted only in the admitted frequency range.
Maritime Band:
- After pressing key 15 <Channel / Frequ.> the „Set Channel“- window will appear on the
display (see Fig. 18)
- keys 5 <+> and 10 <–> are selecting the channel
- Key 6 <Ok> confirms theselected frequency / channel. The device is returning into the
bearing mode using the selected frequency / channel.
- Key 9 <Esc> will reject the selection, and the device is returning into the bearing mode,
working on the previous frequency / channel.
3.2.4 Squelch Function, Key 14 <Squelch>
3.2.4.1 Common Remark
Our surrounding atmosphere always contains a certain electric field strength, designated as
“noise”. This noise voltage, which can be received, depends on the frequency and the
location of the receiver.
Interpreting signals reasonably is only possible, if their level is higher than the level of the
surrounding noise. Using the squelch electronic it is possible to adjust a threshold, under
Issue:2005/09/27-Rev.01_01
Page 20 of 72
Operating Manual
Bearing System RT 300
which received signals will not be processed. Usually the sqelch threshold is adjusted as
close as possible above the noise level. In that case the bearing system will work only, if a
signal is received. As long as no signal is received, the speaker is remaining mute.
Important:The squelch level is to be kept as low as possible in order not to suppress weak
signals.
3.2.4.2 Adjusting the Squelch
The squelch level is to be adjusted,
when receiving no signal.
- pressing key 14 <Squelch> , the
-
-
Pointer squelch level
receiving level
bar graph
digital level display
„Adjust Squelch“ -window will
digital value of squelch
appear.
level
Key 8 <→> is starting the
Fig. 19
automatic squelch setting procedure. For a duration of
about 3secs the signal level is measured, and then the squelch level will be set ca. 3 %
above the peak value of the measuring period. After that the „Adjust Squelch“- window
will reappear.
Using keys 5 <+↑> resp. 10< -↓> the squelch level can be adjusted manually.
The pointer on the top of the graphic display and the digital display are indicating the
present level of the squelch threshold.
Pressing key 3 <←> disables the squelch function (level will be set to 0% ).
Key 6 <Ok> confirms the input and the device will return into the bearing mode.
Key 9 <Esc> will reject the selection and the device will return into the bearing mode.
If no confirmation, using key 6 <OK> is done within 25 secs after the last input, the
device will return into the bearing mode with the previous adjustment.
The squelch level for the airband and for the maritime band are adjusted and saved
separately. On different frequencies within the range of one band the noise level may be
varying significantly. Coastal areas with industries may show higher noise levels than in
offshore areas. This makes it important, to periodically check the squelch adjustment, and, if
required, to readjust the squelch level in order to acquire highest sensitivity of the bearing
system.
Remark:
While bearing emergency transmitters, which are transmitting often very weak signals, it
may be useful to deactivate the squelch function in order to obtain highest sensitivity of the
bearing system. In this case it is important to check continouosly if the transmitter is beared
and not an interfering signal. This can by verified by changing the heading, causing a
change of the relative bearing value. If required, actuate the "Clear"-function (see 3.2.10)
3.2.5 Volume Key 5 <Vol.+> and 10 <Vol –>
Pressing key 5 <Vol +> resp. key 10 <Vol -> in the
bearing mode, the window „Adjust Volume“ appears.
- Further actuating of key 5 increases continuously
- the volume, key 10 decreases the volume.
Bar graph and digital display are indicating the
selected percentage (see Abb. 20) of the maximal
volume.
Issue:2005/09/27-Rev.01_01
Page 21 of 72
Abb. 20
Operating Manual
Bearing System RT 300
Speaker signal and external audio output are affected equally (see 3.5.2.2).
3.2.6 „Selective Squelch“, Key 4 <ELT only>
3.2.6.1 Common Remark
The international distress frequency is reserved exclusively for emergency transmissions .
That means, transmissions are to be sent only in case of emergency or in order to prevent
an emergency. Airliners, aircrafts or vessels as well as coastal radio stations are kept
monitoring these frequencies in order to intercept distress calls. Unfortunately the distress
frequencies are misused for entertainment, from our experience about 4 to 8 times a day. In
order to prevent false alarms, the bearing system RT 300 has an integrated function called
“selective squelch”. If activated, all signals not transmitting the specified sweep tone for
emergency transmitters, will be suppressed. Depending on the field strength of the signal,
the electronic device takes several seconds to analyse the signal. If an emergency
transmission is recognized (e.g. Emergency Locator Transmitter) alarm will be started. This
function can only be activated for frequencies in the airband.
3.2.6.2 Activating / Deactivating „Selective Squelch“
Key 4 <ELT only> is opening a window as shown in Fig. 21.
If confirming with key 6 <OK> within 5 secs, the “selective
squelch” is activated, the device returning in bearing mode.
If not confirming within that time, the selected status will
remain.The display is showing the selected function „OELT“(see Fig. 7: ). O-ELT means: Only Emergency Locator
Transmitter. Deactivation correspondingly (Fig. 23).
Fig. 21
Caution:
Fig. 22
- The “selective squelch” activated, only signals in the
airband with the typical ELT-sweep tone modulation will be beared. All other signals will
be suppressed. The “selective squelch” can only be activated in the airband.
- At very weak signals detection may take a certain time or even be impossible. In
this case alarming is delayed or not possible.
-
Issue:2005/09/27-Rev.01_01
Page 22 of 72
Operating Manual
Bearing System RT 300
3.2.7 Scan function Key 12 <Scan>
3.2.7.1 Common Remarks
The bearing system RT 300 is eqipped with only one receiver. If working in the maritime
band, signals in the airband cannot be recognized and vice versa. So, a certain risk exists
not to receive a distress signal and not to start alarming. In order to prevent this case the
scanning function SCAN was installed.
The SCAN-function activated, every 30 secs the device is switching over from the working
frequency to the distress frequency 121.500 MHz, but only during a gap of reception. Is a
signal received on 121.500 MHz, the device will remain tuned on the distress frequency.
The alarm contact will be actuated (see 3.3.2.5.5.1). While scanning, the message SCAN in
the display is shown inverted, and in the frequency display 121.500 MHz will be indicated.
If no signal is received , the device switches back to the previous working frequency.
The function SCAN can be combined with function “selective squelch”.
3.2.7.2 Scanfunktion Activating / Deactivating Scanning
Function
Pressing key 12 <Scan>, the scanning window in the display
is openendas shown in Fig. 23 Confirming within 5 secs with
key 6 <OK> activates the scanning function. If not confirming
within that time, the selected status will remain. The display
„SCAN“ will apear in the LC- display. (see Fig. 7: ).
Deactivation correspondingly. (See Fig. 24)
Fig. 23
Caution:
- We strongly recommend always to activate the scanning
function in order to minimize the risk of missing an alarm
signal.
Fig. 24
- During the scanning process bearing isn´t possible on the
operating frequency.
If a continuous signal is beared on the operating frequency, there is no scanning on
the distress frequency possible (only possible in signal gaps).
3.2.8 Function Repeat Key 3 <Repeat>
If no more bearable signal is received, the last bearing value will still be indicated for 10
secs, then the display of the bearing value will disappear e (see 3.1.4). By actuating key 3
<Repeat> the last bearing value will be shown once more.
Caution:
If there is no compass compensation activated (see 3.3.2.5.4), the indicated bearing value
is corresponding with the vessel´s heading at the time of the last bearing. If there was a
change of heading in the meantime, this change has to be took in consideration!
Issue:2005/09/27-Rev.01_01
Page 23 of 72
Operating Manual
Bearing System RT 300
3.2.9 Funktion Live Key 8 <Live>
The bearing system is processing 750 single bearing procedures per second. These single
bearings may be varying in a significant range, depending on signal strength and
modulation.. The processing computer is averaging spread of
the bearing values over a certain time by the
unaveraged
signal
means of a special processing algorithm (see
3.3.2.5.1.1), thus achieving a fairly stabilized
display.
Pressing key 8 <Live> during the bearing mode, the LED
circle will indicate the unaveraged single bearing values.
The range of variation of the display allows to analyze the
received signal and is a measure of the bearing quality.
Abb. 25
3.2.10 Function Clear Key 9 <Clr>
Actuating key 9 <Clr> during the bearing mode, the averaging memory will be canceled.
After releasing the key the averaging process is starting again.
This function is to be applied in order to minimize the drag error, if receiving very weak
signals.
Issue:2005/09/27-Rev.01_01
Page 24 of 72
Operating Manual
Bearing System RT 300
3.3 The Menu
Adjustments and also system configurations, which haven´t to be changed during bearing
operations, are to be selected and adjusted in the menu . Furthermore information as serial
numbers or program versions are available.
Caution!
Wrong adjustments may affect the bearing system`s functions seriously. Alarm functions
with a wrong adjustment may not work as desired or may deliver faulty values. So, it is
important before starting to adjust, to know what to do. Therefore, please read this operating
manual carefully in advance. In case of arising questions, please contact our service. We
will support you gladly.
- Key 7 <Menu> calls up the main menu on the LC-diplay.
- Using keys 3< ←>, 5< ↑ >, 8< → >, und 10< ↓ > navigate in the corresponding submenu.
The selected menu subjects are shown inverted (highlighted).
- Key 6 <OK>will confirm the selection.
- Pressing key 9 <Esc> will reject the new selection and the device will return to the next
higher menu level, or, in the main menu, the device will leave the menu function..
- If the menu is called up and key 7<Menu> is pressed, the device will return to the bearing
mode. Changed adjustments will be rejected.
For better orientation the LC-display´s top line is showing the present position in the menu.
Issue:2005/09/27-Rev.01_01
Page 25 of 72
Operating Manual
Bearing System RT 300
3.3.1 The Menu Structure
1. Level
Light
Bearing
Info
Sounds
2. Level
DIM LCD
DIM LEGEND
DIM CIRCLE
LCD CONTRAST
Bearing Type
View Bearing Setup
Beacon
Receiver
DCU
Statistics
Beep Volume
Alarm Volume
Bearing
Receiver
Menu
Serial
Setup
Compass
3. Level
4. Level
Average
Compensation
Mounting
Offset
Last time
Last Comp
Channel Mode
Power On Default
AFC Mode
RX Type
Baud Rate
Identity
Protocol
Talk Mode
Talk Time
True Source
Static True
Intern Compass
Calibration
Deviation
Variation
Magnetic Source
Static Mag.
Relay
Other
Service
Ext. Input
Demo Mode
Factory Reset
Bearing
Receiver
DCU
Compass
Reboot
Menu Selection
Selection
Adjustment
Issue:2005/09/27-Rev.01_01
Page 26 of 72
Relays Mode
MOB Pulse Time
Operating Manual
Bearing System RT 300
Display
Routine
3.3.2 The Main Menu
Abb. 26
Ok
Ok
Ok
cancel
Ok
Ok
Ok
Pressing key 7 <Menu> in the bearing mode will call up the main menu. Following
submenus may be selected:
Issue:2005/09/27-Rev.01_01
Page 27 of 72
Operating Manual
Bearing System RT 300
a) LIGHT/LCD : Adjustments of the LC-display´s lighting, keyboard, LED-circle and the
display´s contrast.
b) BEARING:
Selection of reference direction for the digital bearing value
Indication of relevant bearing parameters.
c) INFO:
Indication of received transmitter identification (not available at present)
Indication of receiver-parameters
Indication of DCU-parameters
Indication of operating parameters
d) SOUNDS:
Adjustment of the keyboard´s volume
Adjustment of the alarm signal´s volume
e) SETUP:
Selection of bearing parameters
Receiver adjustments
Configuration of interface
Selection of bearing value compensation with compass
Other adjustments
Reset of factory defaults
f) SERVICE:
Displays and parameters required for service purposes.
3.3.2.1 Menu LIGHT/LCD
Menu
LIGHT/LCD
In submenu MENU\LIGHT\LCD all lighting adjustments
for display, keyboard and contrast can be done.
Fig. 27
3.3.2.1.1 Adjusting brightness of LC- display: Function DIM LCD
Menu
LIGHT/LCD
DIM LCD
In submenu MENU\LIGHT\DIM, select function DIM LCD.
The bar graph as shown in Fig. 28 will appear.
Keys 5< + > und 10< – > adjust background lighting of the Fig. 28
LC- display.
Keys 8< → > resp. 3 < ← > will switch the brightness to maximum or will switch off the
lighting.
Confirm adjustment using key 6 <OK>.
Issue:2005/09/27-Rev.01_01
Page 28 of 72
Operating Manual
Bearing System RT 300
3.3.2.1.2 Adjusting Brightness of Kkeyboard lighting: Function DIM LEGEND
Menu
LIGHT/LCD
DIM LEGEND
In submenu MENU\LIGHT\DIM, select function DIM
LEGEND. The bar graph as shown in Fig. 29 will appear.
Fig. 29
- Adjust brightness of keyboard lighting using keys 5 < + >
and 10 < – >.
- Keys 8 < → > resp. 3 < ← >, will switch brightness to maximum or shut off.
- Confirm selected adjustment using key 6 < OK >.
Key 9 < Esc > will reject the adjustment, the device is returning to the next higher menu
level.
3.3.2.1.3 Adjusting brightness of LED-circle: Function DIM CIRCLE
Menu
LIGHT/LCD
DIM CIRCLE
In submenu MENU\LIGHT\DIM, select function DIM
CIRCLE .the bar graph as shown in Fig. 30 will appear.
Fig. 30
- Adjust brightness of LED-circle using keys 5 < + > and 10
< – >.
- Keys 8 < → > resp. 3 < ← >, will switch brightness to maximum or shut off.
- Confirm selected adjustment using key 6 < OK >.
- Key 9 < Esc > will reject the adjustment, the device is returning to the next higher menu
level.
3.3.2.1.4 Adjusting contrast of the LC-display: Function LCD CONTRAST
Menu
LIGHT/LCD
LCD CONTRAST
In submenu MENU\LIGHT/LCD, select function LCD
CONTRAST. The bar graph as shown in Fig. 31 will
Fig. 31
appear.
Adjust contrast of LC-display using keys 5 < + > and 10 < – >.
- Keys 8 < → > resp. 3 < ← >, will switch contrast to maximum or minimum.
- Confirm selected adjustment using key 6 < OK >.
- Key 9 < Esc > will reject the adjustment, the device is returning to the next higher menu
level..
Issue:2005/09/27-Rev.01_01
Page 29 of 72
Operating Manual
Bearing System RT 300
Caution!
If adjusting the contrast to minimum resp. maximum value, the display may become
unreadable! This may complicate readjustment or make it even impossible.
In this case please proceed as follows:
- Switch off device using key 1 < ON/OFF >.
- keep pressed key 7 < Menu > and
- switch on device using key 1 < ON / OFF >
- release key 7 < Menu >
contrast adjustment apears in the default adjustment. If desired, proceed with a new
contrast adjustment.
3.3.2.2 Menu: BEARING
Menu
BEARING
Fig. 32
In submenu MENU\BEARING the reference direction of the
bearing value display may be selected (see Fig. 7: ). Furthermore, all relevant bearing
setups may be observed.
3.3.2.2.1 Selecting bearing reference direction: Selecting Function BEARING TYPE
Menu
BEARING
BEARING TYPE
In submenu MENU\BEARING, select function BEARING
TYPE. The submenu as shown in Fig. 33 will appear.
Fig. 33
Select reference direction by using keys 8 < → > resp. 3 <
← >. The selection is shown inverted.
- Confirm selection by using key 6 < OK > .
- Key 9 < Esc > will reject the adjustment, the device is returning to the next higher menu
level.
Issue:2005/09/27-Rev.01_01
Page 30 of 72
Operating Manual
Bearing System RT 300
Reference
direction
In example of Fig. 36 bearing relations are
shown for the bearing displayof Fig. 35.
TN
MN
Fig. 35
V AR
10°
W ES T
ma g n e
tic b
ea
rin
g
60
°
a
Tr
m
ns
e
itt
r
M
A
G
060°
°
relative earing 310
b
Fig. 36
Issue:2005/09/27-Rev.01_01
Page 31 of 72
0°
3.3.2.2.1.2 Reference Direction: (magnetic) North - MAG
If compass data, basing on magnetic north, are available
at the interface, and / or the internal compass (optional)
is installed, bearing values with reference direction
magnetic North may be put out.
24
relativ bearing240°
R
E
L
3.3.2.2.1.1 Reference direction: Relative Bearing - REL
The digitally indicated bearing value is
N
relative to the antenna´s longitudinal
axis. If mounted correctly, it is
corresponding to the vessel´s
(vehicle´s) longitudinal axis. For the
determination of the relative bearing
Tr
an
sm
no compass information (via NMEA
itte
r
interface or compass module) is
required (see. 3.2.8). So, the relative
bearing value is available if an
external compass is out of order.
The digitally shown bearing value is
corresponding to the indication of the
LED-circle.
The reference direction is indicated as
Fig. 34: Example Relative Bearing 240°
REL (=relative) left of the digital
bearing value.
Operating Manual
Bearing System RT 300
3.3.2.2.1.3 Reference Direction: Geografic North (true North) - TRUE
If compass data, basing on true (geographic) North, are
available at the interface, bearing values referring to true
North can be put out. Choose in submenu BEARING
TYPE selection TRUE (= true North). Now the active
reference direction is diplayed as TRU (= true) left of the
digital bearing value .
If the optional compass module is installed,
reference
the bearing value can also be put out with
direction
reference direction geografic North, and the
local variation has to be set up in in the setup
menu. (see 3.3.2.5.4.5.3).
Fig. 37
The example of Fig. 38 is showing relations
for the bearing display of Fig. 37.
TN
tr u e
be
ar
ing
60
°
i tte
sm
n
a
Tr
r
T
R
U
060
°
rela
tive b
earing 310°
Fig. 38
Issue:2005/09/27-Rev.01_01
Page 32 of 72
Operating Manual
Bearing System RT 300
3.3.2.2.2 Display Bearing Parameters: VIEW BEARING SETUP
Menu
BEARING
VIEW BEARING SETUP
In submenu MENU\ BEARING, select display function VIEW
BEARING SETUP,. see Fig. 39.
The important bearing adjustments are shown here.
Designation
Meaning
Fig. 39
Range
Averaging Level Depth of averaging store
Compensation
drag error compensation by compass data
Mounting
Antenna mounting
normal = mast upright
inverse = mast downright
Offset
Offset value to be added to bearing value,
e.g. in order to compensate mounting
errors.
1 .. 9
ON / OFF
normal, inverse
0 – 360°
3.3.2.5.1.4
3.3.2.3 Menu: INFO
Menu
INFO
Following information can be put out in the menu INFO:
Beacon: Receiver identification
Receiver: Receiver data
DCU: Data of the Display Control Unit (DCU)
Statistics: Operating data of the system
Fig. 40
3.3.2.3.1 INFO Beacon
Menu
INFO
BEACON
In submenu MENU\ INFO, select display function BEACON. The
display appears as shown in Fig. 41.
These functions are not yet available at the present.
Issue:2005/09/27-Rev.01_01
Page 33 of 72
See
chapter.
3.3.2.5.1.1
3.3.2.5.1.2
3.3.2.5.1.3
3.3.2.5.1.3
Fig. 41
Operating Manual
Bearing System RT 300
3.3.2.3.2 INFO Receiver
Menu
INFO
RECEIVER
In submenu MENU\ INFO, select display function RECEIVER. The
display appears as shown in Fig. 42.
Here the important data of the receiver can be seen:
Designation
DEVICE
SERIAL
HARDWARE
SOFTWARE
Fig. 42
Meaning
type of receiver
serial number of receiver
harware version of receiver
software version of receiver.
3.3.2.3.3 INFO DCU (Display Control Unit)
Menu
INFO
DCU
In submenu MENU\ INFO, select display function DCU . The display
appears as shown in Fig. 43.
Here the important data of the DCU can be seen:
Designation
DEVICE
SERIAL
HARDWARE
SOFTWARE
Fig. 43
Meaning
Type of DCU
serial number of DCU
hardware version of DCU
software version of DCU.
3.3.2.3.4 INFO Statistics
Menu
INFO
STATISTICS
In submenu MENU\INFO, select display function STATISTICS. The
display appears as shown in Fig. 44.
Here the operating parameters can be seen.
Designation
SWITCHED ON
RUNNING TIME
EBWJ RESETS
Meaning
number of switch-ons
operating time
number of recognized resets
Issue:2005/09/27-Rev.01_01
Page 34 of 72
Fig. 44
Operating Manual
Bearing System RT 300
3.3.2.4 Menu: SOUNDS
Menu
SOUND
In submenu MENU\ SOUNDS, the volume of keyboard
signals and of the alarm sound may be adjusted.
Fig. 45
3.3.2.4.1 Adjusting Key Volume: Function BEEP VOLUME
Menu
SOUND
BEEP VOLUME
In this menu the volume of the short audible tone, if pressing a
key, can be adjusted.
Fig. 46
In submenu SOUND, select function BEEP VOLUME.
The bar graph as shown in Fig. 46 will appear.
Using keys 5 < + > and 10 < – > the volume of the key signal can be adjusted .
Keys 8 < → > resp. 3 < ← >will set the volume to maximum resp. minimum.
Key 6 < OK > is confirming the adjustment.
3.3.2.4.2 Adjusting Volume Alarm Signal: Function ALARM VOLUME
Menu
SOUND
ALARM VOLUME
If an distress signal is detected, an alarm signal is put out at the
speaker and at the audio exit. The volume is adjustable.
Abb. 47
In submenu SOUND, select function ALARM VOLUME.
The bar graph appears as shown in Abb. 47.
Using keys 5 < + > and 10 < – > the volume can be adjusted.
Keys 8 < → > resp. 3 < ← >will maximize resp. minimize the volume.
Key 6 < OK > will confirm the adjustment.
Caution:
Too low alarm signals may be not recognized and search and rescue measures may start
too late or not at all.
3.3.2.5 Menu SETUP
Menu
SETUP
In submenu MENU\ SETUP all operating setups can be done.
Issue:2005/09/27-Rev.01_01
Page 35 of 72
Fig. 48
Operating Manual
Bearing System RT 300
Prior putting into operation the bearing system, all setups have to be checked and, if
required, adapted.
Warning:
Faulty setups may lead to considerable misfunctions, which may not be recognized
immediately. Therefore, the setup is to be lead only by instructed persons.
In order to avoid unauthorized changes of the setup, the setup
menu can be locked. The locking is indicated by the symbol ±
(see Fig. 49).
Locking and unlocking see 3.4.1.
Fig. 49
The setup menu is structured as follows:
Menu
Designation
BEARING
RECEIVER
SERIAL
COMPASS
OTHER
Meaning
Locked Setup Menu
see chapter
Setups controlling bearing functions
Setups controlling receiver functions
Setup of interface parameter
Setup of compass data
Setup of alarm contact functions
Setup external input
FACT. RESET Routine to reproduce factory defaults
3.3.2.5.1
3.3.2.5.2
3.3.2.5.3
3.3.2.5.4
3.3.2.5.5
3.3.2.5.6
3.3.2.5.1 SETUP Menu BEARING
Menu
SETUP
BEARING
In submenu MENU\ SETUP\ BEARING the setups for the
bearing value determination are executed.
Abb. 50
Warning:
Setup adjustments is this menu are influencing the bearing result. Faulty setups may lead to
wrong bearing results, and it may not be possible, to recognize this error imediately. In case
of doubt don´t hesitate to contact the service or the service hotline of the firm RHOTHETA.
Issue:2005/09/27-Rev.01_01
Page 36 of 72
Operating Manual
Bearing System RT 300
Following setups can be done in the menu BEARING :
Menu
designation
AVERAGE
Meaning
averaging bearing
value
COMPENSATION compensation of
reference direction
MOUNTING
mounting direction (up
/ down)
OFFSET
bearing value offset
LAST TIME
Duration of indication
of last bearing value
LAST
COMPENSATION
adjustment of the depth of the
bearing value memory
selection of heading compensation
source
Input of mounting direction
Input of a correcting value (deviation)
for bearing value output
Adjustment of bearing value
indication after last bearing
Activation / Deactivation of heading
compensation of LED-circle display
(repeat function)
3.3.2.5.1.1 Adjusting Bearing Value Averaging Memory: AVERAGING
Menu
SETUP
BEARING
AVERAGE
Common Remarks:
The bearing system processes about 750 bearing values a
Fig. 51
second. Depending on the quality of the received signal (field
strength, modulation), the single bearing results may be varying significantly. The single
bearing values are being averaged with a special algorithm by the DCU´s electronic. The
depth of the value memory (number of used single bearing values) may be adjusted in
submenu SET AVERAGING LEVEL (see Fig. 51).
To be considered:
- the greater the averaging level → the greater depth of memory.
- the greater the averaging level → the more stable the display
- the greater the averaging level → the higher the sensitivity
- the greater the averaging level → the more drag error (see 3.3.2.5.1.2)
So, the adjustment has to be a compromise between a stable display and the drag error.
With a high averaging level the sensitivity becomes a bit better (with deactivated squelch),
but the display is getting rather inert, thus complicating the normal working with the system.
With a low averaging level the display becomes a kind of nervous, especially with
modulated, weak signals,.
The factory default has the averaging level 5 and is a good compromise.
Operating:
In submenu SETUP-BEARING, select function AVERAGE.
The bar graph as shown in Fig. 51 will appear.
Adjust averaging level by using keys 5 < + > and 10 < –>.
Issue:2005/09/27-Rev.01_01
Page 37 of 72
Operating Manual
Bearing System RT 300
Keys 8 < → > resp. 3 < ← > will reset the level to maximum or minimum.
Key 6 < OK > will confirm the adjustment.
3.3.2.5.1.2 Select source of heading compensation: SET COMPENSATION SOURCE
Menu
SETUP
BEARING
COMPENSATION
During mobile use on vessels or land vehicles it takes a certain
time for the display to respond to a change of heading (or
Fig. 52
course). See → drag error, see 3.3.2.5.1.1. If compass
information is available, the change of heading will be determined and the drag error can be
eliminated by the bearing system. The bearing system is corresponding without delay to the
changes of heading of the vehicle.
In order to activate this function, the delivered (and required) compass data (true, magnetic,
internal compass) for compensation have to be selected. It is only mentioned here, that the
selected data sources have to be available (see 3.3.2.5.4).
Caution:
Drag errors will only be compensated, if caused by changes of heading of the own vehicle.
If the transmitter is changing it´s position, a drag error will occur again.
Following compass data sources may be selected:
Designation
OFF
TRUE
MAG
INT
Meaning
no heading compensation
The source is an external compass with reference
direction geographic (true) North
the source is an external compass with reference
direction magnetic North
the source is the internal compas module (optional)
see chapter
3.3.2.5.4.1
3.3.2.5.4.2
3.3.2.5.4.5
3.3.2.5.1.3 Selecting Mounting Direction of Antenna: SELECT MOUNTING TYPE
Menu
SETUP
BEARING
MOUNTING
Fig. 53
Issue:2005/09/27-Rev.01_01
Page 38 of 72
Operating Manual
Bearing System RT 300
Usually the antenna is mounted on top of a mast (see Fig. 54). In special cases it may be
necessary to mount the antenna upside down (see Fig. 55).
In submenu MENU\ SETUP\ BEARING\ MOUNTING, the mounting direction may be
seleted.
NORM is corresponding to the normal topmounting Fig. 54, INVERS coresponding to
the upside down mounting as shown in Fig.
55.
Fig. 54
Fig. 55
normal mounting
upside down mounting
3.3.2.5.1.4 Adjusting Correcting (Offset)
Value: ADJUST BEARING OFFSET
Menu
SETUP
BEARING
OFFSET
If bearing results are differing from the actual angle of arrival for a
constant value, a correcting value (offset) can be adjusted, to be
added to each bearing result. Deviations are caused e.g. by
incorrect alignment of the antenna with the longitudinal axis of the
vehicle.
Fig. 56
Adjust offset in submenu MENU\SETUP\ BEARING\ OFFSET.
- Select the decimal with keys 3 < ← > and 8 < → > .The postion is underlined.
- Keys 5 < + > and 10 < – > are increasing / decreasing the value.
- If decreasing the value +000, the sign will change to negative. A negative sign indicates
the value to be substracted from the bearing result.
- Confirm the adjusted value with key 6 < Ok >. The device is returning to the next higher
menu level..
- Key 9 < Clr > will reject the adjusted value, the device is returning to the next higher
menu level and will work with the previous offset adjustment.
Issue:2005/09/27-Rev.01_01
Page 39 of 72
Operating Manual
Bearing System RT 300
3.3.2.5.1.5 Adj. Extended Display of Last Bearing Result : SET BEARING LAST TIME
Menu
SETUP
BEARING
LAST TIME
After receiving the last signal, the bearing result is still diplayed for a
certain adjustable time. This adjustment is done in submenu
BEARING LAST TIME.
Fig. 57
Operating:
- Using keys 3 < ← > and 8 < → >, select the minutes or seconds to be changed. The
selected digit is shown underlined.
- Increase or decrease the corresponding value by using keys 5 < + > and 10 < – >.
- Key 6 < Ok > will confirm the selected value. The device is returning to the next higher
level in the menu.
- Key 9 < Esc > will reject the selected value. The device will return to the next higher level
in the menu and will work with the previous adjustment.
3.3.2.5.1.6 Heading Compensation for REPEAT-FUNCTION : LAST VALUE
COMPENSATION
Menu
SETUP
BEARING
LAST COMP
The bearing result is always a relative bearing referring to the
antenna´s longitudinal axis. Compass information available, the
Fig. 58
bearing result can be converted to a direction, referring to North,
independent of the antenna axis. The LED-circle will always indicate the relative
bearing. If now activating the REPEAT-function, (showing the last bearing result) – see
3.2.8, the displayed bearing value is the relative bearing value with the vehicles heading at
the time when the last bearing signal was received. If there was a change of heading after
the last bearing and after activating the REPEAT-function, the indicated bearing value has
lost it´s meaning completely.
If compass data are available (external or internal), the change of heading can be
measured. If activating now the REPEAT function, the indicated value will be corrected for
the present heading.
Caution:
There will only be compensated changes of heading of the own vehicle. Changes of bearing
angles, caused by a change of position of the bearing or transmitting station will, - of
course-, not be considered.
Issue:2005/09/27-Rev.01_01
Page 40 of 72
Operating Manual
Bearing System RT 300
3.3.2.5.2 SETUP Menu RECEIVER
Menu
SETUP
RECEIVER
In setup menu RECEIVER, all adjustments concerning the
bearing receiver and it´s functions, can be done.
Abb. 59
Following adjustments can be done in menu RECEIVER:
Menu short designation
CHANNEL MODE
POWER ON DEFAULT
AFC
Meaning
selecting frequency tuning (in the
maritime band) by either selection of
channel number or by input of
frequency
System start when switching on, with
last selected adjustments or with
factory default
activating / deactivating of AFC
(automatic frequency control)
see chapter
3.3.2.5.2.1
3.3.2.5.2.2
3.3.2.5.2.3
3.3.2.5.2.1 Frequency Selecting Mode in the Maritime Band : CHANNEL MODE
Menu
SETUP
RECEIVER
CHANNEL MODE
Usually the operating frequency in the maritime band is selected by
an allocated channel number. The bearing system offers the
possibility to input directly the frequency. In submenu MENU\
SETUP\ RECEIVER\ CHANNEL MODE you can make this setup.
Fig. 60
CHANNEL MODE Operating Order
ON
frequency input by entering channel number
OFF
Direct frequency input
Caution:
Selection only possible in the maritime band.
Operating:
- In submenu MENU\ SETUP-RECEIVER, select function CHANNEL MODE, see Fig. 60.
- With keys 5 < + > resp. 8 < → > and 10 < – > resp. 3 < ← > select ON or OFF.
- the active selection is shown inverted.
- Confirm selection with 6 < OK >.
- Key 9 < Clr > will reject the selection, the device will return to the next higher level of the
menu.
Issue:2005/09/27-Rev.01_01
Page 41 of 72
Operating Manual
Bearing System RT 300
3.3.2.5.2.2 Selecting Starting Setup : POWER ON DEFAULT
Menu
SETUP
RECEIVER
POWER ON DEFAULT
In submenu MENU\ SETUP\ RECEIVER CHANNEL MODE select,
if, after switching on the device, the previous frequency adjustments Fig. 61
will be overtook, or if channel 16 (156,800 MHz) will be selected.
In the airband the distress frequency is always preselected (121,500 MHz), in order not to
miß an alarm.
LOAD POWER
ON DEFAULTS
ON
OFF
Starting setup
Channel 16 (= 156,800 MHz)
(Airband: 121,500 MHz) is preselected
In the maritime band, device will start with last operating
frequency.
(Airband: 121,500 MHz)
Operating:
- In submenu SETUP\RECEIVER, select function POWER ON DEFAULT, as shown in
Fig. 61.
- - Keys 5 < + > resp. 8 < → > and 10 < – > resp. 3 < ← > will select ON or OFF.
- The active selection is shown inverted.
- Key 6 < OK > will confirm the selection.
- Key 9 < Clr > will reject the selection, the device will return to the next higher level of the
menu, working with the previous adjustment.
3.3.2.5.2.3 Activating / Deactivating AFC: AFC MODE
Menu
SETUP
RECEIVER
AFC MODE
The bearing receiver is provided with an AFC circuitry (automatic
frequency control). Thus, transmitters can be received, even if their
Fig. 62
frequency is a bit out of the premitted frequency range. The
receiving frequency is tuned automatically in direction of the transmitter frequency. .
In the setup menu RECEIVER AFC MODE the AFC- function can be activated and
deactivated.
AFC MODE
ON
OFF
Working order
AFC activated
AFC deactivated
Issue:2005/09/27-Rev.01_01
Page 42 of 72
Operating Manual
Bearing System RT 300
Operating:
- In submenu SETUP\RECEIVER select function AFC MODE.
- The menu appears as shown in Fig. 62.
- Keys 5 < + > resp. 8< → > and 10 < – > resp. 3 < ← > will select ON or OFF.
- The active selection is shown inverted.
- Key 6 < OK > will confirm selection.
- Key 9 < Clr > will reject the selection, the device will return o the next higher level of the
menu, working with the previous adjustment.
3.3.2.5.3 SETUP Menu: SERIAL
Menu
SETUP
SERIAL
In submenu MENU\ SETUP\ SERIAL all adjustments
concerning interfaces and their function are done.
Fig. 63
Following adjustments can be done in submenu SERIAL:
Menu Short Designation Meaning
RX TYPE
selection of type of interface
- RS-232
- RS-485
- RS-422 (NMEA)
BAUD RATE
Adjusting velocity of data transmission
IDENTITY
selecting address-codes
PROTOCOL
selecting data protocol
TALK MODE
selecting transmitting mode
TALK TIME
Adjusting of transmitting repeating
intervall in TALK MODE „Auto“
See Chapter
3.3.2.5.3.1 Selecting Type of Serial Interface for Data Reception : SELECT SERIAL RX
TYPE
Menu
SETUP
SERIAL
RX TYPE
For data exchange, the bearing system is offering three
different interfaces:
Fig. 64
- RS-232
- RS-485
- RS-422 (NMEA)
In setup menu SERIAL RX TYPE the interface for data reception can be selected.
Issue:2005/09/27-Rev.01_01
Page 43 of 72
Operating Manual
Designation
RS232
NMEA
RS485
Bearing System RT 300
Meaning
active interface RS-232
active interface RS-422 (NMEA)
active interface RS-485
Caution:
See documentation ”Serial Communication & Remote Control“ describing exactly all these
functions.
3.3.2.5.3.2 Adjusting Velocity of Data Transmission: SET SERIAL BAUD RATE
Menu
SETUP
SERIAL
BAUD RATE
In submenu MENU\SETUP\ SERIAL\ BAUD RATE, the velocity
of data transmission (Baud Rate) of the serial interface can be Fig. 65
adjusted .
Following Baud rates are possible:
1.200; 2.400; 4.800; 9.600; 14.400; 19.200; 28.800; 38.400; 57.600; 76.800;115.200 Baud.
Caution:
See documentation ”Serial Communication & Remote Control“ describing exactly all these
functions.
3.3.2.5.3.3 Adjusting device adressing: SET SERIAL IDENTITY
Menu
SETUP
SERIAL
IDENTITY
In submenu MENU\SETUP\ SERIAL\ IDENTITY an adress of
the interface for the bearing system can be set.
Fig. 66
Caution:
See documentation ”Serial Communication & Remote Control“ describing exactly all these
functions.
Operating:
In submenu SETUP\SERIAL, select function IDENTITY.
- The menu appears as shown in Fig. 66.
- Keys 5 < + > resp. 8< → > and 10 < – > resp. 3 < ← > will increase / decrease the
adress.
- Key 6 < OK > will confirm selection.
Key 9 < Clr > will reject the selection, the device will return to the next higher level of
the menu, working with the previous adjustment.
Issue:2005/09/27-Rev.01_01
Page 44 of 72
Operating Manual
Bearing System RT 300
3.3.2.5.3.4 Selecting Data Protocol: SELECT SER. TX PROTOCOL
Menu
SETUP
SERIAL
Protocol
In submenu MENU\ SETUP\SERIAL\ PROTOCOL the data
protocol of the serial interface can be adjusted.
Following adjustments are possible:
- NMEA
- Binary (at the present no data record defined)
Abb. 67
Caution:
See documentation ”Serial Communication & Remote Control“ describing exactly all these
functions.
3.3.2.5.3.5 Selecting Type of Transmission: SELECT SER. TALK MODE
Menu
SETUP
SERIAL
TALK MODE
In submenu MENU\SETUP\ SERIAL\ TALK MODE the type of
data transmission of the serial interface can be selected.
Following adjustments are possible:
Designation
REQUEST
AUTO
Abb. 68
Meaning
Data will only be sent if required by an other device
Data will be sent automatically in a certain adjustable
intervall
Caution:
See documentation ”Serial Communication & Remote Control“ describing exactly all these
functions.
3.3.2.5.3.6 Adjusting Transmitting Interval.: SET SERIAL AUTO TALK TIME
Menu
SETUP
SERIAL
TALK TIME
In submenu MENU\ SETUP\ SERIAL\ TALK TIME, select time
interval for sending data via the serial interface in transmitting
mode ”auto”.
Fig. 69
Caution:
See documentation ”Serial Communication & Remote Control“ describing exactly all these
functions.
Issue:2005/09/27-Rev.01_01
Page 45 of 72
Operating Manual
Bearing System RT 300
Operating:
- In submenu SETUP\ SERIAL, select adjusting functionTALK TIME.
- The menu appears as shown in Fig. 69.
- Keys 5 < + > resp. 8 < → > and 10 < – > resp. 3 < ← > are increasing / decreasing the
interval.
- Key 6 < OK > will confirm the adjustment.
- Key 9 < Clr > will reject the selection, the device will return to the next higher level of the
menu, working with the previous adjustment..
3.3.2.5.4 SETUP Menu: COMPASS
Menu
SETUP
COMPASS
Via it´s NMEA –interface the bearing system is able to receive
and to process data of an external compass and data of the
Fig. 70
internal compass module. These data are used to put out
heading information referring to North and to compensate drag errors caused by changes of
heading.
In setup menu COMPASS the reference direction of the incoming data (magnetic /
geographic)is to be defined .
For stationary use instead of compass data, constant values can be put in (see 3.3.2.5.4.4 ).
Following adjustments in menu COMPASS can be done:
Menu short designation Meaning
TRUE SOURCE
source for compass data referring to
geographic North:
- Static True
- internal compass (optional)
- NMEA-data in format HCHDG
- NMEA-data in format HEHDT
- NMEA-data in format HCHDT
MAG SOURCE
source for compass data referring to
magnetic North:
- static magnetic
- internal compass (optional)
- NMEA-data in format HCHDG
- NMEA-data in format HEHDT
- NMEA-data in format HCHDT
STATIC TRUE
Input of a constant angle as reference to
geographic North.
→ function required for stationary use
STATIC MAG
Input of a constant angle as reference to
geographic North.
→
function required for stationary
use.
Issue:2005/09/27-Rev.01_01
Page 46 of 72
see chapter
3.3.2.5.4.1
3.3.2.5.4.2
3.3.2.5.4.3
3.3.2.5.4.4
Operating Manual
Bearing System RT 300
Menu short designation Meaning
INT. COMPASS
see chapter
Operating:
- In setup menu select function COMPASS.
- The display will appear as shown in Fig. 70.
- With keys 5 < ↑ > resp. 10 < ↓ > and 3 < ← > resp. 8 < → >, select corresponding data
source.
- The active selection is shown inverted.
- Key 6 < OK > will confirm the adjustment.
- Key 9 < Clr > will reject the selection, the device will return to the next higher level of the
menu, working with the previous adjustment.
3.3.2.5.4.1 Selecting Data Source Referring to Geographic (True) North: SET
COMPASS TRUE SOURCE
Menu
SETUP
COMPASS
TRUE SOURCE
In submenu MENU\ SETUP\ COMPASS\ TRUE SOURCE a
data source is related to true North.
Fig. 71
Following adjustments are possible:
Designation
STATIC TRUE
INT.COMPASS
NMEA HCHDG
NMEA HEHDT
NMEA HCHDT
Meaning
The source is a constant value. This value can be adjusted as
metioned also in 3.3.2.5.4.3 .
This adjustment is required for stationary use (see 3.3.2.5.4.3)
The source is the (optional) internal compass.
→ Caution: The internal compass module is delivering data referring
to magnetic North. Therefore, the local variation has to be
compensated (see 3.3.2.5.4.5.3).
Data source are data of an external compass, connected via NMEAinterface. Data format is HCHDG (see documentation “Serial
Communication & Remote Control“, describing exactly all these
functions).
Data source are data of an external compass, connected via a NMEA
interface. Data format is HEHDT (see documentation ”Serial
Communication & Remote Control“, describing exactly all these
functions).
Data source are data of an external compass, connected via a NMEA
interface. Data format is HCHDT (see documentation “Serial
Communication & Remote Control“, describing exactly all these
functions).
Operating:
- In submenu COMPASS, select function TRUE SOURCE.
- The display appears as shown in Fig. 71.
Issue:2005/09/27-Rev.01_01
Page 47 of 72
Operating Manual
Bearing System RT 300
- Keys 5 < ↑ > resp. 10 < ↓ > and 3 < ← > resp. 8 < → >are selecting the corresponding
data source.
- The active selection is shown inverted.
- Key 6 < OK > will confirm the adjustment
- Key 9 < Clr > will reject the selection, the device will return to the next higher level of the
menu, working with the previous adjustment.
3.3.2.5.4.2 Selecting Data Source Referring to Magnetic North : SET COMPASS MAG
SOURCE
Menu
SETUP
COMPASS
MAG SOURCE
In submenu MENU\ SETUP\ COMPASS\ MAG SOURCE, a
data source is related to magnetic North.
Following adjustment are possible:
Designation
STATIC MAG
INT COMPASS
NMEA HCHDG
NMEA HEHDT
NMEA HCHDT
Fig. 72
Meaning
The source is a constant value. The value can be adjusted as
described in. 3.3.2.5.4.4.
This adjustment is required for stationary use (see )
The source is the (optional) internal compass.
Data source are data of an external compass, connected via NMEAinterface. Data format is HCHDG (see documentation “Serial
Communication & Remote Control“, describing exactly all these
functions)..
Data source are data of an external compass, connected via a NMEA
interface. Data format is HEHDT (see documentation ”Serial
Communication & Remote Control“, describing exactly all these
functions).
Data source are data of an external compass, connected via a NMEA
interface. Data format is HCHDT (see documentation “Serial
Communication & Remote Control“, describing exactly all these
functions).
Operating:
- In submenu COMPASS, select function MAG SOURCE.
- The display appears as shown in Fig. 72
- Keys 5 < ↑ > resp. 10 < ↓ > and 3 < ← > resp. 8 < → >are selecting the corresponding
data source.
- The active selection is shown inverted.
- Key 6 < OK > will confirm the adjustment
- Key 9 < Clr > will reject the selection, the device will return to the next higher level of the
menu, working with the previous adjustment.
Issue:2005/09/27-Rev.01_01
Page 48 of 72
Operating Manual
Bearing System RT 300
3.3.2.5.4.3 Input of Static True value : SET STATIC TRUE HEADING
Menu
SETUP
COMPASS
STATIC TRUE
In submenu MENU\ SETUP\COMPASS\ STATIC TRUE a
constant value (angle) can be related to the direction of
reference STATIC TRUE (fixed, static mounting, referring to
true North) .
Fig. 73
Operating:
- Keys 3 < ← > and 8 < → > are selecting the decimal. The selected digit is shown
underlined.
- Increase / decrease the corresponding value by using keys 5 < + > and 10 < – >.
- Key 6 < Ok > will confirm the selected value. The device will return to the next higher
level.
- Key 9 < Esc > will reject the selected value. The device will return to the next higher
level and is working with the previous offset adjustment.
3.3.2.5.4.4 Input of value ”Static magnetic”: SET STATIC MAG
Menu
SETUP
COMPASS
STATIC MAGN
In submenu MENU\ SETUP\COMPASS\ STATIC MAG a
constant value (angle) can be related to the direction of
reference STATIC MAGNETIC (fixed, static mounting, referring
to magnetic North).
Fig. 74
Operating:
- Keys 3 < ← > and 8 < → > are selecting the decimal. The selected digit is shown
underlined.
- Increase / decrease the corresponding value by using keys 5 < + > and 10 < – >.
- Key 6 < Ok > will confirm the selected value. The device will return to the next higher
level.
- Key 9 < Esc > will reject the selected value. The device will return to the next higher
level and is working with the previous offset adjustment.
Issue:2005/09/27-Rev.01_01
Page 49 of 72
Operating Manual
Bearing System RT 300
3.3.2.5.4.5 Configuration of internal compass module : INT. COMPASS
Menu
SETUP
COMPASS
INT. COMPASS
Is the bearing system equipped with the optional compass
module, following adjustments have to be done:.
- Calibrating the compass
- compensating of deviation (compass error)
- adjusting of local magnetic variation
Fig. 75
These adjustments can be done in submenu MENU\ SETUP\ COMPASS\ INT. COMPASS.
3.3.2.5.4.5.1 Calibrating Compass: INT. COMPASS CALIBRATION
Menu
SETUP
COMPASS
INT. COMPASS
CALIBRATION
After installing the bearing antenna, the compass should be
calibrated. Calibration eliminates environmentally caused
interferences of the magnetic field. Calibration improves
significantly the precision of the compass.
In order to calibrate the compass, the bearing antenna has to be Fig. 76
rotated twice in it´s vertical axis, the rotational direction doesn´t
matter.
Procedure:
- In submenu MENU\ SETUP\ COMPASS\ COMPASS INT\
Fig. 77
CALIBRATION the display appears as shown in Fig. 76.
- Use key 8 < → > to start the calibrating procedure.
- Now the bearing antenna has to be rotated twice (720°) in its vertical axis with an angular
speed as constant as possible.
- Exactly after rotating 720° the calibration process will be completed by pressing key 8 <
→ >.
Procedure for vessels.
- The vessel navigates with constant speed on a circular track as narrow as possible.
- Start the calibrating procedure at a certain compass course as described above.
- The display is as shown in Fig. 77
- After ending the second circle (the same course shown in the compass display) the
calibrating will be completed by pressing key 8 < → >.
Procedure for land vehicles
- The vehicle is driving with constant speed on a circular track as narrow as possible. (e.g.
in a roundabout).
- Start the calibrating in a certain position as described above.
- The display is as shown in Fig. 77 .
- After ending the second circle the calibrating will be completed by pressing key 8 < → >.
Issue:2005/09/27-Rev.01_01
Page 50 of 72
Operating Manual
Bearing System RT 300
Caution:
After calibrating optimally, the precision of the compass is ± 2°. If the internal compass is
used as a source for north referring bearings, in the adverse case, the compass error can
be added the bearing result.
Hint:
The present compass data can be displayed in submenu MENU\ SERVICE\ COMPASS
(see 3.3.2.6.4).
3.3.2.5.4.5.2 Input of Compass Error – Deviation-: INT. COMPASS DEVIATION
Menu
SETUP
COMPASS
INT. COMPASS
Deviation
Deviation is the difference of angle between the actual magnetic
North direction and the North direction determined by the
internal compass. Usually, the deviation may be different for
each compass value. If the calibration was done properly, these
Fig. 78
differences have been eliminated largely. If a constant
aberration is appearing, it can be compensated
TN = true north
N TN
by the input of a correcting value.
CN M
DEV VAR
7°W 8°W
C
=
=
°
0°
11
°
=
8
11
5
12
H
H
M
TH
Example:
- The magnetic heading (MH) of the vessel is
118° (indicated on the vessel´s compass)
- The compass heading (CH), put out by the
compass module of the bearing system, is
125°.
- The difference between CH and MH equals 7°,
that means a deviation of 7°.
- For the compass heading is greater than the
magnetic heading, the direction of the
deviation is ”West“. (The deviation is ”EAST“ if
Fig. 79
the compass heading is smaller than the
direction of the deviation)
- The value to be put in in our example therefore is „WEST 007“.
MN = magnetic north
CN = compass north
TH = true heading
MH = magnetic heading
CH = compass heading
Hea
d
i ng
Hint:
The present compass data can be displayed in submenu MENU\ SERVICE\ COMPASS
(see 3.3.2.6.4).
3.3.2.5.4.5.3 Input Magnetic Variation: INT. COMPASS VARIATION
Menu
SETUP
Issue:2005/09/27-Rev.01_01
COMPASS
INT. COMPASS
Page 51 of 72
VARIATION
Operating Manual
Bearing System RT 300
If the compass module shall be used as a source for
geographic North, the local magnetic variation has to be put in.
Variation is the difference between geographic and magnetic
North (see Fig. 79). Magnetic variation is depending on the
location on earth and to be took from corresponding charts.
Fig. 80
3.3.2.5.5 SETUP Menu: OTHER
Menu
SETUP
OTHER
In submenu SETUP\OTHER, setups, concerning the operation
Fig. 81
of the relay contact of the alarm function, are done.
Additionally the input of the self bearing suppression (SBS) can be activated and the demo
mode can be started.
3.3.2.5.5.1 Configuration of Relay-contact : RELAY
Menu
SETUP
OTHER
Relay
The bearing system RT 300 is eqipped with a relay-contact,
Fig. 82
which is closing if a distress signal is detected . It´s contacts
are integrated in the „POWER“ connector (see 3.5.2.3), external devices may be connected
(e.g. GPS MOB-function, alarm bell, warning light , etc...).
The working order can be set up in submenu OTHER\RELAY.
3.3.2.5.5.1.1 Setting up Relay Mode: RELAYS MODE
Menu
SETUP
OTHER
RELAYS
RELAYS-MODE
Depending on application, different relay modes can be
selected:
Fig. 83
Designation
Disabled
On
Function
Application
Relay deactivated
no external device connected
The contact remains closed Connection of an alarm bell
until the received signal is
disappeared.
Issue:2005/09/27-Rev.01_01
Page 52 of 72
Operating Manual
Bearing System RT 300
Designation
Puls (MOB)
Function
As soon as a signal is
exceeding the squelch
level, the contact is closing
for a defined time and will
opens then again.
A new activation of the
relay will happen only after
a restart of the system.
The activation is indicated
by the anchor-symbol in the
LC-display (see Fig. 7:
“alarm contact status“).
Application
For the connection of a MOB-function (Man
Over Board) of a GPS-receiver. Î
storage of position at the time of reception.
This function is working on all frequencies.
Caution:
Releasing the relay by restarting the
system is to avoid the following situation:
If the transmitting signal is lost for a short
time, the GPS-position would be
overwritten. This position wouldn´t be
equivalent to the position of the first alarm
(place of accident at MOB-situation). The
first position would be overwritten
(depending on GPS) and therefore lost.
ELT-On
Contact closes, as soon as
a distress signal (ELTmodulation) is recognized
by the ”selective squelch“
and will open again, if no
more signal is received.
This function is only
available in the airband.
Contact closes, as soon as
the “selective squelch” has
recognized an distress
signal (ELT-modulation).
A new activation of the
relay will happen only after
restarting the system.
The activation is indicated
by the anchor symbol in the
LC-display(see Fig. 7:
“alarm contact status“).
- Connection of an alarm bell (if a distress
signal is received) to be activated only in
the airband.
Recommended in connection with OnlyELT-function.
ELT-Puls (MOB)
As at PULS (MOB) function, but the
system will react only on signals in the
airband.
3.3.2.5.5.1.2 Adjusting Pulse duration of the relay: MOB PULSE TIME
Menu
SETUP
OTHER
RELAY
In submenu MENU\ SETUP\ OTHER\ RELAY\ MOB-PULSE
TIME the pulse duration of the relay contact can be adjusted.
The adjustment can be made for the relay modes „Puls (MOB)“
and „ELT-Puls (MOB)“.
Select a pulse duration between 100 ms and 2500 ms.
Issue:2005/09/27-Rev.01_01
Page 53 of 72
MOB PULSE TIME
Fig. 84
Operating Manual
Bearing System RT 300
3.3.2.5.5.2 Activating / Deactivating of Self Bearing Suppression: EXT. INPUT
Menu
SETUP
OTHER
EXT. INPUT
If there shall be transmitted on the receiving frequency of the
vehicle / ship, also the own transmitting signal will be beared.
Fig. 85
Usually this is not desired, additionally there is the
disadvantage, that the last bearing will be overwritten.
In order to avoid this, there is the function “self bearing suppression”(SBS).
For the SBS-function the PTT –key of the transmitter has to be connected to PIN 8 of the
“power” connector (see 3.5.2 and 5.1).
Now, if the key is actuated, the bearing process is interrupted.
3.3.2.5.5.3 Activating / Deactivating of Self Bearing Suppression: EXT. INPUT
Menu
SETUP
OTHER
DEMO MODE
By activating the DEMO MODE the DCU can be used without a
connected antenna unit (AU). This is very useful for training or Fig. 86
maintenance.
The DCU emulate the AU and shows a fictive bearing witch is slowly moving all the time.
3.3.2.5.6 SETUP Menu: FACTORY RESET
Menu
SETUP
FACTORY RESET
In submenu MENU\SETUP the function FACTORY RESET can
be selected. This function will reset following adjustments to the
Fig. 87
factory default:
Designation
Short Designation
Brightness of LC-display
Brightness of keyboard
Brightness LED-circle
Contrast of LC-display
bearing reference direction
Volume audio-signal
Volume keyboard -signal
Volume alarm-signal
DIM LCD
DIM LEGEND
DIM CIRCLE
LCD CONTRAST
BEARING TYPE
VOL +; VOLBEEP VOLUME
ALARM VOLUME
Issue:2005/09/27-Rev.01_01
Page 54 of 72
Factory
default
100 %
50 %
100 %
45 %
RELATIVE
50 %
50 %
100 %
See chapter
3.3.2.1.1
3.3.2.1.2
3.3.2.1.3
3.3.2.1.4
3.3.2.2.1
3.2.5
3.3.2.4.1
3.3.2.4.2
Operating Manual
Bearing System RT 300
Designation
Short Designation
Bearing value averaging memory
Source heading-compensation
Mounting direction of bearing
antenna
Correction value Offset
Extended display of bearing value
Heading compensation for
REPEAT.function
frequency selecting mode
Starting setup
AVERAGING
COMPENSATION
MOUNTING
BEARING OFFSET
LAST BEARING TIME
LAST VALUE
COMPENSATIO
CHANNEL MODE
POWER ON
DEFAULT
AFC (automatic frequncy control) AFC MODE
serial interface
RX-Type
Data transmitting velocity (Baud
SERIAL BAUD RATE
rate)
Device addressing
SERIAL IDENTITY
selecting data protocol
SER. TX ROTOCOL
selecting type of transmitting
SER. TALK MODE
Transmitting interval
SERIAL AUTO TALK
TIME
Data source for reference
COMPASS TRUE
direction geographic North
SOURCE
Data source for reference
COMPASS MAGN.
direction magnetic North
SOURCE
Static True value
STATIC TRUE
HEADING
Static magnetic value
STATIC TRUE
HEADING
Deviation (internal Compass)
INT. COMPASS
DEVIATION
Variation (internal Compass)
INT. COMPASS
VARIATION
Relay-mode
RELAY-MODE
Pulse duration of relay:
MOB-PULSE TIME
Self bearing suppression (SBS)
EXT. INPUT
Factory
default
Level 5
OFF
NORM
See chapter
0°
10 sec
OFF
3.3.2.5.1.4
3.3.2.5.1.5
3.3.2.5.1.6
ON
ON
3.3.2.5.2.1
3.3.2.5.2.2
ON
RS-232
4800 Baud
3.3.2.5.2.3
3.3.2.5.3.1
3.3.2.5.3.2
000
NMEA
auto talk
250 ms
3.3.2.5.3.3
3.3.2.5.3.4
3.3.2.5.3.5
3.3.2.5.3.6
NMEA HEHDT
3.3.2.5.4.1
NMEA HCHDT
3.3.2.5.4.2
0°
3.3.2.5.4.3
0°
3.3.2.5.4.4
0°
3.3.2.5.4.5.2
0°
3.3.2.5.4.5.3
disabeld
10 ms
off
3.3.2.5.5.1.1
3.3.2.5.5.1.2
3.3.2.5.5.2
3.3.2.5.1.1
3.3.2.5.1.2
3.3.2.5.1.3
3.3.2.6 MENU: SERVICE
Menu
Service
In submenu SERVICE all functions required for the verification Fig. 88
of the nominal characteristics of the bearing system, or to support the detection of errors,
can be found.
Issue:2005/09/27-Rev.01_01
Page 55 of 72
Operating Manual
Bearing System RT 300
3.3.2.6.1 Service menu: BEARING
Menu
SERVICE
1
BEARING
In service menu BEARING all importantant data required for the
determination of bearing values, are indicated. These data are
used for error analysis in case of service as well as for
2
3
4
5
preadjusting the signal-delay-time-compensation during
6
production. While bearing, the bar graph is permitting
Fig. 89
conclusions about the present quality of bearing and signal.
Following data are displayed (see Fig. 89):
7
8
1. Bearing quality: percent of determined, usable single bearing values.
2. Level: present signal field strength
3. Bearing value: reference direction and bearing value
4. Bearing phase clockwise rotation: averaged bearing values at clockwise rotation of
antenna
5. Bearing phase anticlockwise rotation: averaged bearing values at anticlockwise rotation
of antenna
6. Level testing signal:
7. Value of signal-delay-time-adjustment.
8. The slope of the bar is a measure of the bearing quality. The steeper, the better the
bearing.
Operating:
- Key 9 < Clr > is cancelling the averaging memory. After releasing the key the bar graph
will be rebuilt.
- Leave the menu by pressing key 6 < Ok >.
3.3.2.6.2 Service menu: RECEIVER
Menu
SERVICE
RECEIVER
Fig. 90
In submenu SERVICE\ RECEIVER present receiver parameters are
displayed.
Designation
STATUS
U-IN
U-OFFS
Meaning
Status of receiver module
If no error detected, display OK.
If error detected, display of error number.
Voltage supply of receiver module
Offset voltage of the discriminator (Measure for frequency deviation of
transmitter)
Issue:2005/09/27-Rev.01_01
Page 56 of 72
Operating Manual
Designation
U-LEV
LEVEL
AFC
Bearing System RT 300
Meaning
AGC voltage (measure for receiving field strength)
Receiving field strength (see also 3.1.6)
AFC activated or deactivated (see 3.3.2.5.2.3)
3.3.2.6.3 Service Menu: DCU
Menu
SERVICE
DCU
In submenu SERVICE\ DCU present DCU-parameters will be
displayed.
Designation
STATUS
U-IN
EXT-IN
AF-IN
Fig. 91
Meaning
Status of DCU
If no error detected, display OK.
If error detected, display of error number.
Voltage supply of DCU
Displays present logic level of input EXT-IN (see 3.3.2.5.5.2)
Audio frequency counter (required for detecting an emergency signal)
3.3.2.6.4 Service Menu: COMPASS
Menu
SERVICE
COMPASS
1
2
In submenu SERVICE\COMPASS the compass data, available for
the different reference directions resp.the internal (optional)
compass module, are dispayed.
Select reference direction using key 3 < ← > and 8 < → >.
If there are available NMEA-data as shown in Fig. 92 the graphic
display will show bearing value and data transmitting velocity. The
LED-circle will show the present bearing too.
Fig. 92
Fig. 93
Example Fig. 92:
1. Data transmitting velocity of (every 1000 msec one set of
data); OK is indicating, that all data can be interpreted.
2. present heading
Fig. 94
Example Fig. 93:
Internal compass
Compass heading = 208°
Data transmitting velocity: 250 msec
Heading compensation: activated (+COMP)
Issue:2005/09/27-Rev.01_01
Page 57 of 72
Operating Manual
Bearing System RT 300
Example Fig. 94:
No compass data available for reference direction geographic North or too few data to be
interpreted.
3.3.2.6.5 Service menu: REBOOT
Menu
SERVICE
REBOOT
Confirming REBOOT using key 6 < OK > in submenu
SERVICE\REBOOT will restart the microprocessor of the DCU.
During booting the display is showing „Please wait, reboot in
progress!“ as in Fig. 95-.
Fig. 95
3.4 Special Functions
3.4.1 Locking / Unlocking the Setup Menu
The setup menu can be locked in order to prevent unauthorized change of the setup or by
mistake. Select SETUP in the main menu and keep pressing key 12 < Scan > for about 3
secs, until the symbol (padlock) is appearing (see Fig. 49) . The setup menu is locked.
In order to unlock the menu, select SETUP in the main menu keep pressed key 12 < Scan
> for 3 secs, until the symbol ± disappears. The setup menu is unlocked.
3.4.2 Resetting Brightness and Contrast Adjustment of Display
Reading of the LC-display and correction of the contrast value may become impossible if
adjusting the contrast value incorrectly. .
In that case brightness and contrast adjustments can be reset as follows:
- Switch off DCU using key 1 On/Off
- Switch on DCU using key 1 On/Off and
- press key 7 < Menu > within 1 sec after pressing key ON/OFF
Contrast of display and background lighting are set to the factory default. This adjustment
will not be stored after switching off the DCU. Therefore, all adjustments in submenu
LIGHT/LCD (see 3.3.2.1) have to be redone and confirmed with key OK.
3.4.3 Loading Firmware Updates
If there is a new firmware available, it can be uploaded via the interface port on the backside
of the DCU. How to proceed is described in the documentation “RT-300 Firmware Update”
witch is available by contacting RHOTHETA (www.rhotheta.de).
Issue:2005/09/27-Rev.01_01
Page 58 of 72
Operating Manual
Bearing System RT 300
3.5 Interfaces
On the backside of the DCU three connectors can be found, connecting antenna, power
supply and other external devices.
3.5.1 Antenna connector on DCU:
The antenna connector is connecting Display-Control-Unit (DCU) and (Fig. 2 d) antenna
unit (AU)
Type of connector: D-Sub-socket; 9-poled
Pin wiring:
5 4 3 2 1
9 8 7 6
D-Sub-socket
Contact
(PIN)
1
2
3
4
5
6
7
8
9
Shield
Signalname
Signal
ANT-EAST
ANT-WEST
RS485/A
RS485/B
12..30V
ANT-SOUTH
ANT-NORTH
NF
PHI
GND
control signal East
control signal West
data signal
data signal
voltage supply
control signal South
control signal North
audiosignal
bearing signal
ground
3.5.2 Power Connector
The power supply is connected to the Power Connector (Fig. 2 g). Additionally this
connector contains contacts for the external speaker, alarm relay and input for the SBSfunction (self bearing suppression).
1 2 3 4 5
6 7 8 9
D-Sub-socket
Contakt
(PIN)
1
2
3
4
5
Signalname
Signal
GND
NF-OUT-B
RELAY-B
RELAY-A
U-IN-GND
internal and housing ground,
audio exit for external speaker
alarm contact
alarm contact
negative voltage supply s
Issue:2005/09/27-Rev.01_01
Page 59 of 72
Operating Manual
6
7
8
9
Shield
Bearing System RT 300
ANALOG-TEST
NF-OUT-A
EXT-INPUT
U_IN_12..30V
GND
not connected
audio exit for external speaker
input for SBS-function
positive voltage supply r (12 ..24 V)
housing ground, frame
3.5.2.1 Power supply
The power supply is connected to
PIN 5: [-] voltage supply GND (ground) and
PIN 9: [+] positive voltage supply
.
Permitted range of operating voltage: 11V... 28 V DC
current consumption:
max. 500 mA (depending on operating voltage and connected
external devices)
Caution:
- Ground of voltage supply not identical to ground of housing (due to interconnected noise
filter)!
- Confusing the poles will damage the device!
- The voltage supply is not separeted galvanically from the frame. If desired, eg. in order to
prevent current flow to the ground of the vessel, a DC/DC-converter has to be adapted.
3.5.2.2 External speaker
An external speaker can be connected to the symmetric audio exit PIN 7 and PIN 2. The
level of the audio signal is controlled in the “adjust volume” submenu (see 3.2.5.).
Permitted impedance of speaker: 4 ... 600 Ohm
max. voltage (PIN 7 – PIN 2): 10 Vss
max. permitted power: 1,5 W
Caution:
The audio exit is connected to a push-pull amplifier. Therefore none of the audio signals is
to be connected to ground. Grounding audio signals will damage the device.
3.5.2.3 Alarm contact
The alarm contact is connected to (see 3.3.2.5.5.1) PIN 3 and 4. It is a mechanic relay with
floating contacts.
Current: max. 1A
max. voltage: 50 V (DC)
(values for ohmic (resistive) load)
Controlling: see 3.3.2.5.5.1
3.5.2.4 Extern Input
Contact PIN 8 is a sensory input for digital logic levels. The contact is connected to +5V by
the means of a PULL-UP-resistor (10 kΩ).In order to activate the SBS-function (as
Issue:2005/09/27-Rev.01_01
Page 60 of 72
Operating Manual
Bearing System RT 300
described in 3.3.2.5.5.2) the input has to be connected to GND (PIN 1) by the means of an
external operating contact.
3.5.2.5 Analog Test
PIN 6 is carrying a nominal signal, serving for trouble-shooting in the case of service.
During operation of the bearing system this contact is not to be connected.
3.5.3 Interface Connector
The bearing system RT 300 has different interfaces for data exchange.
- RS-232
- RS-422
- RS-485
These interfaces are connected to socket ”Interface Connector“ (see Fig. 2 f).
5 4 3 2 1
9 8 7 6
D-Sub-socket
Contact
(PIN)
1
Signal name
Signal
RS485TRX/RS422TX-B
Depending on adjustment, see
3.3.2.5.3.1
Selection:
RS-485 Ö RS-485 TRX-line
NMEA Ö RS-422 TX-B-line
RS-232 Ö RS-422 TX-B-line
TX-line RS-232-interface (always active)
RX-Leitung RS-232-interface
(activating see 3.3.2.5.3.1)
RS-422 reiceiving line GND
Masse
Depending on adjustment see 3.3.2.5.3.1
Selection:
RS-485 Ö RS-485 TRX-line
NMEA Ö RS-422 TX-B-line
RS-232 Ö RS-422 TX-B-line
RS-422 receiving line anode
activation see 3.3.2.5.3.1
RS-422 receiving line kathode
activation.see 3.3.2.5.3.1
voltage supply +5V DC
(voltage supply for interface modules)
current output: max. 200 mA
Ground
2
3
RS232TX
RS232RX
4
5
6
RS422RX-SHIELD
GND
RS485TRX/RS422TX-A
7
RS422RX-A
8
RS422RX-B
9
+5V-OUT
Shield
GND
Issue:2005/09/27-Rev.01_01
Page 61 of 72
Operating Manual
Bearing System RT 300
3.5.3.1 RS-232-Interface
For Interface functions see documentation “RT-300 NMEA Serial Communication & Remote
Control”
3.5.3.2 RS-485-Interface
For Interface functions see documentation “RT-300 NMEA Serial Communication & Remote
Control”
3.5.3.3 NMEA (RS-422) Interface
For Interface functions see documentation “RT-300 NMEA Serial Communication & Remote
Control”
Issue:2005/09/27-Rev.01_01
Page 62 of 72
Operating Manual
Bearing System RT 300
4 Installation and Putting into Operation
4.1 Installation of Display-Control-Unit DCU
4.1.1 DCU Installing Cut-out
The DCU is to be installed in an instrument panel in a suitable position. Therefore, an
installing cut-out, as shown in Fig. 96, has to be set.
210
193
ø4.5
80
106
alternative tapping M4
R8.5
Fig. 96
Choose installing position in way, that the DCU is not exposed to excessive heat.
In order to achieve good reading, on vessels the installing position of the DCU should be
situated within the range of view of the control desk.
Installing:
• Make sure, that there are no endangered elements (e.g. wiring, gas- or water pipes)
within the range of the installing cut-out.
• Cut out attached mounting template, transfer the 4 fixing holes and the installing cutout to the mounting surface.
• Drill the four 4.5 mm holes for the fixing screws or tap four M 4-threads into the
mounting surface, in order to achieve comfortable installing from the front.
• Set installing cut-out.
• Plug in connectors for power supply, bearing antenna and other additional devices.
Issue:2005/09/27-Rev.01_01
Page 63 of 72
Operating Manual
Bearing System RT 300
• Place the DCU into the installing cut-out and fix it using the delivered M4 allen screws.
4.1.2 Connecting power supply
The „Power Connector“ (see Fig. 2 f) is connecting DCU and power supply.
Wiring pattern:
PIN 5: GND (ground resp. negative pole).
PIN 9: Voltage supply (+12 .. 24V)
- The power supply has to be eqipped with a fuse of 1A, inert.
- If the bearing system is to be operated floating, a DC/DC
converter has to be adapted between Battery and DCU.
The GND-connection is connected galvanically to the
housing!
1 2 3 4 5
GND
6 7 8 9
Fig. 97
+12 .. 24V
The content of delivery contains a prepared power supply cable. The red cable with
integrated fuse holder is to be connected to the positive pole of the voltage supply (+12V ...
24V). The black cable is to be connected to the negative pole of the voltage supply
Caution:
We strongly point out, that a confusion of poles will damage the device.
Never connect the black cable (PIN 5) to positive voltage. PIN 5 is connected to the ground
of the housing and causes a short circuit, damaging the device!
4.1.3 Connecting the DCU to Ground
The ground connector (Fig. 2 e) of the bearing system has to be connected to the ground
of the vehicle For stationary installations the ground connector has to be connected to
earth potential. Use cables of sufficient cross-sectional area.
Caution:
The antenna´s ground is connected to the DCU. Electrostatic charge may cause very high
voltages. Therefore, it is very important earthing the DCU before connecting the antenna.
4.1.4 Connecting Antenna
Connect antenna cable (see 4.3) to socket “Antenna Connector“.
4.2 Determination of Antenna Position
The quality of the bearing results is depending largely on the antenna´s position. So, an
antenna position has to be found, where the transmitter´s wavefield can reach the bearing
antenna as undisturbed as possible.
The bearing antenna is analysing the incoming wavefield and the microprocessor of the
bearing system is determining the direction of incidence of the signal. Reflections of the
incoming signal may interfere with the wavefield. The bearing system will determine a
direction of incidence as an average of the incoming and the reflected signal. As a result,
Issue:2005/09/27-Rev.01_01
Page 64 of 72
Operating Manual
Bearing System RT 300
there is a wobbling bearing display, the error will depend on direction of incidence, distance
and vertical angle of incidence of the signal.
Reflections mainly are caused by conducting objects.
- antennas (especially if working in the same frequency range → GPS-antennas not that
critical)
- metallic superstructures of vessels
- metallic masts
- steel cables
- wet sail-cloth
- persons in direct vicinity of the antenna
Therefore, the best position of the antenna is on top of the mast, above other antenna
systems or other obstacles.
In practice, often a compromise has to be found between bearing and other interests.
Therefore we will give you here some guidelines:
-
No disturbing objects in the antenna´s plane if possible
disturbing objects as distant as possible.
no metallic objects closer than 30 cm under and above bearing antenna.
no objects in direct antenna range (between antenna beams of antenna, except mast).
In the case of doubt the antenna´s position during a practical try-out has to be tested, prior
to final assembly.
Example Fig. 98:
c
Position 1: bearing optimal
Position 2: bearing good
Position 3: bearing sufficient
Position 4: bearing sufficient
d
e
f
Fig. 98
Issue:2005/09/27-Rev.01_01
Page 65 of 72
Operating Manual
Bearing System RT 300
4.3 Completing Antenna Cable
The delivery contains an antenna cable of 10m length. First of all this cable is intended for
testing operation of the system. Usually, for the final assembly a special cable connection
has to be put together. The extent of delivery contains the required plugs and mounting
material.
4.3.1 Type of cable
The connecting cable antenna ⇔ DCU has to have following features:
- Cable length up to 50 m:
Cross-sectional area:
min. AWG 24 (0,23mm²),
number of wires: 9-poled (or more) + shield
Type of cable:
control cable; twisted wires not required. The type of cable in detail is
depending on local requirements ( fire protection, oil resistance, heat…).
If there are no special requirements, a cable of type LiYCY10X0,25mm2 may be
used.
- Cable length up to 100 m:
cross-sectional area:
min. AWG 22 ($ 0,38 mm²),
Number of wire pairs:
12-poled twisted in pairs (or more) + shield
type of cable:
control cable; wires twisted in pairs. The type of cable in detail is
depending on local requirements ( fire protection, oil resistance, heat…)..
If there are no special requirements, a cable of type LifYCY6x2x0,50 mm2 may
be used.
4.3.2 Connecting Pattern of Antenna Cable:
Antenne
DCU
5 4 3 2 1
1 2 3 4 5
9 8 7 6
6 7 8 9
D-Subconnector
D-Sub-socket
Kontakt
1
2
3
4
5
6
7
8
9
Shield
Kontakt
1
2
3
4
5
6
7
8
9
Shield
⇔
⇔
⇔
⇔
⇔
⇔
⇔
⇔
⇔
⇔
Issue:2005/09/27-Rev.01_01
Page 66 of 72
Signal-name
ANT-EAST
ANT_WEST
RS485/A
RS485/B
12...30V
ANT-SOUTH
ANT-NORTH
NF
PHI
GND
Signal
control signal East
control signal West
data signal
data signal
voltage supply
control signal South
control signal North
audio signal
bearing signal
ground
Operating Manual
Bearing System RT 300
Connecting pattern for cable lengths up to 50 m
Fig. 99
Connecting pattern for cable lengths up to 100 m:
Issue:2005/09/27-Rev.01_01
Page 67 of 72
Operating Manual
Bearing System RT 300
4.4 Installing the Antenna
The antenna is to be mounted on a suitable mast tube.
The antenna is delivered either with a threaded flange- d or
with a 6-holed flange c (the flange may be changed if
required).
c
d
4.4.1 Fixing Screw Joint on Mast Tube
If the antenna is deliverd with a screw joint a suitable plastic
screw joint is added gh.. The screw joint is provided for mast Fig 100
tubes with an outside diameter of 50 mm (resp. 40 mm with
added reduction. Preferably the mast tube i is consisting of
plastic.
Put compression nut g (threaded side to the top) onto the
mast tube i. Stick together mast tube i and flange h with
a suitable cement - use added reduction for mast diameter
of 40 mm. On request there are reductions for other mast
diameters.
4.4.2 6-holed Mast Flange
If applying the 6-holed flange, the counterpart for the mast is
not added and has to be manufactured by oneself. Keep
care to align the pitch circle in a way, that one of the holes is
situated in the longitudinal axis of the vehicle.
4.4.3 Installing Antenna Cable with Pull-relief
Pull antenna cable through mast tube. The socket (female)
has to point to the antenna. For cable lenghts of more than
10 m a pull-relief has to be mounted.
In any case, we recommend installing the pull-relief f (in
extent of delivery) between mast and antenna. In this case
only the antenna system is waterproof (IP 67). The pull-relief
has to be installed before mounting the antenna (if using the
added antenna cable, the pull-relief cannot be used).
d
e
f
g
h
i
ø40
Fig. 101
4.4.4 Fixing the antenna
- Connect antenna cable and antenna, tighten check-screws.
- Put antenna to the mast-flange. Take care, that the o-ring of the antenna flange is fitting
firmly into it´s groove.
- Tighten slightly the compression nut (threaded flange).
- Align antenna, the arrow-marked dipole pointing exactly in the longitudinal axis of the
vehicle.
- Tighten firmly screw joint.
- If using the 6-holed flange, mount antenna with the arrow pointing to the vehicles
direction.
- For stationary use, mount anntenna with the arrow pointing to the North.
Issue:2005/09/27-Rev.01_01
Page 68 of 72
Operating Manual
Bearing System RT 300
4.4.5 Aligning Antenna for Mobile Use
Before putting into operation the bearing system, the bearing antenna is to be aligned
exactly.
For vessels and land vehicles the reference direction is the longitudinal axis of the vehicle.
The bearing antenna should be aligned in a way, that the arrow-marked pair of beams is
pointing parallel to the longitudinal axis to the bow resp. to the front of the vehicle.
By the means of a transmitter, the correct alignment can be verified (.
In case of an inevitable, unfavourable antenna position, antenna axis and vehicle axis may
not coincide (offset).
4.4.6 Aligning Antennafor Stationary Use
For stationary use the reference direction of the antenna is magnetic North (QDR) or
geographic North(QTE).
• Aligning for reference direction magnetic North (QDR, from direction finder to
transmitter):
a) A transmitter is to be put up in a distance of at least 100 m from the bearin g
antenna.
b) Determine the direction to the bearing antenna by the means of a compass.
c) Add or subtract to compass value 180°, thus obtaining the nominal value.
d) Switch on transmitter, transmitting continuously.
e) Align antenna in a way, that the display is indicating the nominal value.
f) Tighten screw-joint of antenna.
For verifying purposes the adjustment has to be checked for different directions of
transmission. In case of (untolerable) deviations, change position of antenna.
Caution:
Touching the antenna during rotation will be garbling considerably the bearing result. Befor
reading the bearing results at the DCU, take care that there are no persons in the vicinity of
the antenna.
• Aligning for reference direction QDM (magnetic course from transmitter to direction
finder):
To be done as described in " Aligning for reference direction magnetic North " , the
nominal value has to correspond to the determined compass value.
• Aligning reference direction QUJ (true compass bearing from transmitter to direction
finder):
To be done as described in " Aligning for reference direction QDM " .
• Aligning reference direction QTE (true course from direction finder to transmitter):
To be done as described in " Aligning for reference direction magnetic North QDR" , the
local variation has to be subtracted from the nominal value.
Issue:2005/09/27-Rev.01_01
Page 69 of 72
Operating Manual
Bearing System RT 300
4.4.7 Mounting of Antenna Beams
Put antenna beams into receptacles of the antenna head,
until the fitting is resting fully in the groove of the drilling
(see Fig. 102). Tighten fully compressing nut by hand
until feeling distinct resistance. Tighten nuts by using a
wrench (10 mm), with a torque not exceeding 3 Nm.
Don´t bend antenna beams in order to avoid bearing
errors..
Beam
compression nut
fitting
receptacle
Fig. 102
4.5 Configuring Setup
Once antenna and DCU connected to the power supply, the bearing system will work
already. The factory defaults are set (see 3.3.2.5.6) in a way, that all standard functions are
activated.
The bearing system is offering a great number of functions, different settings and external
devices may be connected. In order to be able to use these features, some adjustments
have to be made prior putting into operation the system. The following chapter is to support
you for this work:
Procedure:
Pos Menu
01
02
03
04
Bearing
05
Sounds
06
Light
Action
Default
adjusting brightness of LCD
brightness of keyboard
brightness LED-circle
select reference direction for digital REL
bearing value display
- REL (relative bearing )
- MAG (magnetic bearing Æ
reference direction
magnetic North )
TRU (true bearing Æ reference
direction geographic North)
adjusting keyboard volume
- BEEP VOLUME
adjusting volume alarm signal
100%
- ALARM VOLUME
Issue:2005/09/27-Rev.01_01
Page 70 of 72
See
chapter.
3.3.2.1.1
3.3.2.1.2
3.3.2.1.3
3.3.2.2.1
3.3.2.4.1
3.3.2.4.2
Remarks
for reference directions MAG
and TRU the source of
compass data has to be
defined in menu COMPASS .
If using an external compass,
in menu SERIAL the interface
has to be defined
adjust volume audible, but not
disturbing
Operating Manual
Pos Menu
07
Setup
Bearing
08
09
10
11
12
13
16
17
18
19
20
21
Action
Default
bearing value averaging memory
5
adjusting source for heading
compensation.
- Off
(no heading
compensation
- TRUE (source of heading
compensation has
reference direction true
North- MAG heading compensations
has reference direction
magnetic North
- INT
heading compensation
by internal compass
selecting mounting direction of
antenna.
- NORM (Normal mounting)
- INVERS (mounting upright
down)
adjusting correcting value
- Offset
OFF
extended display
- Last time
activating heading compensation
for repeat function
- LAST VALUE COMPENSATION
RECEIVER selecting frequency mode in
maritime band
- Channel Mode
14
15
Bearing System RT 300
selecting starting setup
If there is an external
compass connected, it should
be used as a source.
Norm
3.3.2.5.1.3
0°
3.3.2.5.1.4 The correcting value may
compensate constant bearing
errors, e.g. caused by
misalignment.
3.3.2.5.1.5 Adjusting only recommended,
if factory default not optimal.
3.3.2.5.1.6 Only possible, if external or
internal compass available
10 sec.
OFF
ON
ON
Selection of serial interface for data RS-232
reception
- RS-232
- NMEA (RS-422)
- RS-485
adjusting data transmitting velocity 4800
Baud
adjusting device addressing
000
selecting type of transmission
auto talk
adjusting transmitting intervall
250 ms
(in auto-talk-mode)
COMPASS selecting data source for reference
direction true North
selecting reference direction for
magnetic North
SERIAL
Issue:2005/09/27-Rev.01_01
See
Remarks
chapter.
3.3.2.5.1.1 A higher value is only useful,
if drag error compensation
activated (drag error will
increase). smaller values
cause nervous display.
3.3.2.5.1.2 Only source can be selected,
which are actually available. I
selecting MAG or TRUE a
corresponding compass
signal has to be connected. If
selecting INT , the internal
compass module has to be
integrated.
Page 71 of 72
3.3.2.5.2.1 default setup reasonable, for
frequency tuning in maritime
band usually by entering
channel number.
3.3.2.5.2.2 If the device is to restart with
last tuned frequency / channel
number “OFF” has to be
selected.
3.3.2.5.3.1 required only, if external
devices connected.
Adjustment depending on
connected device.
3.3.2.5.3.2
3.3.2.5.3.3
3.3.2.5.3.5
3.3.2.5.3.6
Operating Manual
Bearing System RT 300
5 Appendix
5.1 Wiring pattern (Recommended RT 300 DCU Connections
Plan)
Issue:2005/09/27-Rev.01_01
Page 72 of 72
Download PDF
Similar pages