Nera Saturn BM Marine User manual

Saturn Bm Marine
Class 2
Installation Manual

Safety Warnings, Cautions and Warranty
General
To avoid interference, do not run cables parallel to AC wiring, or near fluorescent lights or other high
magnetic fields. Interference from this kind of sources causing equipment to be faulty or fail working
properly will automatically void warranty conditions.
Access to the interior of the equipment shall be made only by a Nera qualified technician.
The equipment shall be installed by a NERASatCom approved Installation & ServiceAgent.
Warranty is not valid until the "Nera Satcom AS Warranty Certificate" (at the back of the Registration and
Warranty Certificate booklet enclosed with the equipment) is signed and returned to Nera SatCom.
Grounding
Grounded AC power socket shall be installed near the equipment and shall be easily accessible.
Connection to all type of equipment meant for operation of the unit must be done while the unit is
powered off.
Cables and connections
Cables must be shielded. The shield must be grounded at both ends.All peripheral equipment must be
grounded.
Cable lengths exceeding those specified for the equipment interface and connectors, will automatically
void warranty conditions.
– Telephone 150 m 0.5 mm2 min
– ASD 15 m 0.5 mm2 min
– HSD 1.5 m 0.5 mm2 min
– Telex 15 m 0.5 mm2 min
Cable lengths beyond their maximum require special arrangements, cable extenders, short haul mo-
dems etc.
Connection of two (2) Telephone Instruments in parallel is not acceptable.
Configuration of incoming calls to more than four (4) Telephone Instruments may defect the equipment.
Be aware that ports configured for telefax service can not be used for telephone (voice).
Power supply
Power supply voltage specification: 220 VAC ± 10%, 50 – 60 Hz.
Operation from 110 VAC is possible with optional transformer.
Operation from 12 – 28 VDC is also possible.
It is strongly recommended that a 24 VDC source of energy is connected to the 220 VAC/28 VDC Power
Supply.
Equipment ventilation
To ensure adequate cooling of MCU and Power Supply a 10 cm unobstructed space must be main-
tained around all sides of the units (except the bottom side).
Ambient temperature range: 0 – 45 °C.
When installed inside rack or locker, the ambient temperature for the MCU shall not exceed 30° C.
Failure to comply with the above rules for installation will automatically void the warranty.
© Nera SatCom AS, 2000
0434/00
A MEMBER OF CIRM

3
Installation Manual
Saturn Bm CONTENTS
Nera SatCom AS reserves the right to change the design and specifications of the equipment without notice.
Below Decks Equipment – BDE . . . . . . . . . . . . . . . . . . . . . . 4
Above Decks Equipment – ADE . . . . . . . . . . . . . . . . . . . . . . 5
Placing the Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Designing the Antenna mast . . . . . . . . . . . . . . . . . . . . . . . . . 8
Outline dimensions of Antenna radome . . . . . . . . . . . . . . . . . 9
Physical characteristics of main units . . . . . . . . . . . . . . . . . 10
Example of BDE Installation . . . . . . . . . . . . . . . . . . . . . . . . 13
Example of Saturn Bm installation . . . . . . . . . . . . . . . . . . . . 14
Placing the Main Control Unit (MCU) . . . . . . . . . . . . . . . . . . 15
Placing the Distress Alarm and the Message Indicator . . . . 15
Placing the telephone(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Placing the telefax (option) . . . . . . . . . . . . . . . . . . . . . . . . . 16
Placing the PC & Printer (telex, option) . . . . . . . . . . . . . . . . 16
Placing the DTE Equipment . . . . . . . . . . . . . . . . . . . . . . . . . 16
Requirements relating to GMDSS power supply . . . . . . . . . 16
Groundingconsiderations . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Recommended location of units . . . . . . . . . . . . . . . . . . . . . 18
Layingcables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Installing the Above Decks Equipment (ADE) . . . . . . . . . . . 20
Mounting the Main Control Unit (MCU) . . . . . . . . . . . . . . . . 21
DisplayHandset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Handsetcradle/holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
ADE – Connecting the coaxial cable to the Antenna . . . . . . 23
BDE – Connecting the coaxial cable to the MCU . . . . . . . . . 23
Telephones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Telephone and/or telefax socket (option) . . . . . . . . . . . . . . . 24
Gyro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
NMEA-0183 input sources . . . . . . . . . . . . . . . . . . . . . . . . . . 26
PC (telex) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
PC (data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Distress Alarm Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Message Indicator Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Example of local or near-by installation . . . . . . . . . . . . . . . . 30
Example of remote installation . . . . . . . . . . . . . . . . . . . . . . . 31
Interconnection diagrams for termination/connection boxes 32
Location and grounding of units, example 1 . . . . . . . . . . . . 33
Location and grounding of units, example 2 . . . . . . . . . . . . 34
Location and grounding of units, example 3 . . . . . . . . . . . . 35
Connecting up Below Decks Equipment . . . . . . . . . . . . . . . 36
Connecting up Above Decks Equipment . . . . . . . . . . . . . . . 37
Power Supply connected to MCU . . . . . . . . . . . . . . . . . . . . 38
Power Supply connected to telex and printer . . . . . . . . . . . . 39
Mounting connector type 11N-50-10-4 . . . . . . . . . . . . . . . . . 40
Mounting connector type 11N-50-12-10 . . . . . . . . . . . . . . . . 41
Mounting connector type 11N-50-23-10 . . . . . . . . . . . . . . . . 42
Mounting connector type 11N-50-32-2/11N-50-42-2 . . . . . . 43
Main items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9 pin-to-25 pin RS 232 cable . . . . . . . . . . . . . . . . . . . . . . . . 46
9 pin-to-9 pin RS 232 cable . . . . . . . . . . . . . . . . . . . . . . . . . 46
Centronics cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Printer switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Reception of L-band Broadcast signals . . . . . . . . . . . . . . . . 48
Activation of "Radio Silence" . . . . . . . . . . . . . . . . . . . . . . . . 49
Rotary Joint mounting instruction . . . . . . . . . . . . . . . . . . . . . 50
Azimuth angle map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Elevation angle map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Doc. No. QLZB911053 Rev. G Nera Satcom AS 11/02
SYSTEM
PLANNING
APPENDIX 1 – 4
POWER SUPPLY
APPENDIX 5
APPENDIX 6
APPENDIX 7
APPENDIX 8
APPENDIX 9
APPENDIX 10
APPENDIX 11
INSTALLATION

4Installation Manual
Saturn Bm
SYSTEM
Display
handset Main Control Unit  MCU
Gyro
interface
7
4
1
3
6
9
DEL
2
5
8
0
DIAL 00+INTL
TEL.N .+
ON
SHIFT
Standard Conne tion
Additional Conne tion to MCU
Telephones
(wall or desk)
Distress Alarm Unit Power Supply
PC (Data)
Message
Indicator(s)
(max 4)
Power Supply
with stabilized DC for
Printer and PC
PC (Telex) Printer (serial)
Telefax
(replacing a
telephone)
Message Indi ator
SATURN B
DATA MESSAGE
TELEX MESSAGE
FAX MESSAGE
RESET
24 VDC
Extra
Distress Alarm(s)
(max6)
DISTRESS
Saturn B
ALARM
ACKNOWLEDGE
DISTRESS
ALARM
ACKNOWLEDGE
Nera Saturn B
Below Decks Equipment – BDE
Main Control Unit
The Saturn Bm Main Control Unit (MCU) – which constitutes the major
electronic part – is designed for wall or desktop installation. The MCU sup-
plies 28 VDC power to the ADE through the coaxial cable. The MCU power
requirement is 200 W at 11 - 34 VDC (12 V or 24 VDC nominal): - standby
3.5 A, high power 6.7 A, medium power 6.1 A and low power 5.3 A.
Display Handset
The Display Handset keypad and built-in display allow dialling and
control of the MCU and antenna.
Distress Alarm
The Distress Alarm Unit provides remote activation of an alert transmission
and indication of incoming distress calls.
Power Supply
The AC/DC Power Supply is designed for 220 VAC (110 VAC by strapping)
and 24 VDC inputs, and provides 28 VDC output.
24 VDC input from battery is recommended to prevent mains drop problems.
Options
• DTMF telephones (max 5)
• Telefax (replacing one of the DTMF telephones)
• Message Indicator, activated on reception of telex, telefax or data traffic
• PC (Telex)
• PC (Data)
• Serial printer

5
Installation Manual
Saturn Bm
Radome
Antenna
Dish
Antenna
Control
Unit
RF-Unit
Access
Hatch
Servo
Stabilized
Pedestal
Above Decks Equipment – ADE
The Saturn Bm Mk2 Above Decks Equipment consists of:
•Stabilized Antenna with RF-Unit and
Antenna Control Unit (ACU)
•Radome
SYSTEM
BDE – ADE Coaxial Cable

6Installation Manual
Saturn Bm
FREE ADMITTANCE AT
DECK LEVEL AT LEAST
2 M BELOW RADOME
MICROWAVE RADIATION !
NO ADMITTANCE WITHIN 10 M
PLANNING
Placing the Antenna
Avoiding obstructions For GMDSS installations
If the installation shall comply with GMDSS in accordance with the interna-
tional standard IEC 61097-10, please note as follows:
It is desirable that the antenna be sited in such a position that no obstacle
likely to significantly degrade the performance of the equipment appears in
any azimuth down to an elevation angle of -5 degrees.
The siting of the antenna needs careful consideration, taking into account
the adverse effect of high levels of vibration which may be introduced by
the use of a tall mast and the need to minimise shadow sectors. Objects,
especially those within 10 m of the radome which cause a shadow sector of
more than 6 degrees, are likely to significantly degrade the performance of
the equipment.
For non-GMDSS installations
The antenna has a beamwidth of 10 degrees and ideally requires a free
line of sight in all directions above an elevation angle of +5 degrees.
Any obstruction will cause blind sectors, resulting in signal degradation or
even loss of communication with the satellite.
Degradation of the satellite signal can only be completely avoided by plac-
ing the antenna higher than any obstructions. This is often not feasible and
a compromise must be made to reduce the number of blind sectors and
cost of installation.
The degree of signal degradation depends on the size of the obstructions;
the distance to them must therefore be considered.
Preferably, all obstructions within 3 m of the antenna should be avoided.
Obstructions less than 15 cm in diameter can be ignored beyond this
distance.
Radiation precautions Passengers should not be admitted in areas closer than 5 m from the
antenna.
However, no restrictions are required when the antenna radome is installed
at least 2 m above the highest point accessible to passengers.
Authorized personnel should not be near the antenna for periods of more
than 1 hour per day without switching off the RF transmitter.

7
Installation Manual
Saturn Bm PLANNING
Avoiding interference Do not locate the antenna close to interfering signal sources, or in such a
position that the source (e.g. radar-antenna) radiates directly into the Sat-
urn antenna.
The Above Decks Equipment (ADE) should be separated as far as possible
from other transmitters, and preferably by at least 5 m from the antenna of
other communication or navigation equipment, such as the antenna of the
satellite navigator, the VHF antenna or radar equipment.
Compass safe distance For installation on British or Norwegian vessels, the antenna should be
located at a distance of at least 1.0 metres from the magnetic steering
compass. Be aware that requirements may vary from one country to
another.
Other precautions Do not place the antenna close to the funnel, as smoke deposits will then
eventually degrade antenna performance.
Regardless of the location chosen for the antenna, it should point forward
in parallel with the ship’s longitudinal axis when in the middle of its azimuth
range, which will correspond to zero degrees on the azimuth indicator. The
forward direction is indicated on the antenna radome with a heading mark
The antenna should be installed so that severe vibration and shock
are avoided.
If installed on top of a signal and radar mast, the mast must be
supported by stays.
The coaxial cable runs out from the antenna foot in the direction of
the heading mark.
10 CM
RADAR
AVOID INTERFERENCE
E.G. FROM THE RADAR
10°
10°

8Installation Manual
Saturn Bm
PLANNING
S
a
t
u
r
n
B
HOLE
DIA 22 MM
LONGITUDINAL
AXIS OF SHIP
10 MM STEEL PLATE
ANTENNA
UNIT
ACCESS
HATCH
MAST
FLANGE
HEADING
MARK
330MM247.5MM
350 MM
247.5MM
330 MM
Antenna Unit mounted on mast
Designing the Antenna mast
The mast must be designed to carry the weight of the antenna unit, approxi-
mately 90 kg. It must be able to withstand wind forces of up to 120 knots on
the radome as well as the onboard vibration levels. The radome is 1.445 m
high and has a maximum diameter of 1.42 m.
The top end of the mast should be fitted with a flange with holes matching the
bolts extending from the bottom of the radome. See figure below. The flange
must not be so large as to interfere with the hatch at the bottom of the an-
tenna unit. The holes through the mast flange must be positioned symmetri-
cally about the ship’s longitudinal axis.
A HEADING mark on the radome indicates the forward direction of the
antenna.
NOTE: If necessary to disalign heading mark, (because of hatch accessibility),
the antenna inside the radome has to be aligned towards ship's heading. This
must be done before fixed to the antenna mast. (Pedestal coax outlet = Ped-
estal heading mark. (See Installation: "Connecting up Above Decks Equip-
ment").
NOTE: On ships with excessive vibration the mast must be supported by stays
or other adequate means. If the height of the mast makes it neces-
sary to climb up to the antenna unit, a
ladder must be provided on the mast
column. A guard rail must be attached to
the upper section for safety purposes. If the
height of the mast exceeds approximately
4.5 metres, an access platform should be
attached to the mast approximately 1 metre
below the radome bottom.
Be aware that requirements may varyfrom
one country to another.

9
Installation Manual
Saturn Bm PLANNING
ANTENNA
MOUNTING
STUDS, M16
1420 MM
1445 MM
1200 MM
ACCESS
HATCH
SEEN FROM BELOW
Saturn B
HEADING
MARK
480MM
330MM
60MM
Outline dimensions of Antenna radome
2000MM
6 00MM
DIA 140MM
CABLE
SUPPORT
Optional steel Antenna mast, R906569
For welding onto deck

10 Installation Manual
Saturn Bm
PLANNING
Physical characteristics of main units
Telephone (wall)
DBAR 104 001/888
Telephone (desk)
DBAR 201 010/496
32 32
32
139
48
Display Handset
QDGS 911 903
22.5
40
37.5
15 1530
Handset radle/holder
QSXA 911 394
(for Display Handset)
RJ11
60 mm
Extension able
3m: QRPM 911111-3000
10m: QRPM 911111-10000
FUNC
ALPHA
ENTER
SHIFT
MORE/
HELP
LES
PTT
ESC
7
STU
DATA
ØÅ.
4
JKL
1
ABC
LIST
LIST
3
GHI
6
PQR
9
LIGHT
YZÆ
SPC
ON/OFF
DEL
2
DEF
PLAY
5
MNO
8
VWX
TAX
0
ÄÖÜ
ON
SHIFT BAT
ALPHA
DIAL 00+INTL
TEL.N .+
56 mm
2000 mm
215 mm
RJ45
Weight: 0.3 kg Weight: 0.7 kg
142 mm
220 mm
50 mm
Weight: 0.3 kg Weight: 0.06 kg
2000 mm
RJ11
4
5
mm
50 mm
220 mm
2000 mm
61 mm
22 mm
100 mm

11
Installation Manual
Saturn Bm PLANNING
Physical characteristics of main units
Distress Alarm Unit
QUFC 911 910/2
Message Indi ator Unit
QUFC 911 910-3
Mounting bra ket for MCU
QSXA 911 9004
(part of MCU)
31.5
31.5
162
2525 160
45
45
56.5 56.5115
35 mm
90 mm
228 mm
Message Indi ator
Saturn B
DATA MESSAGE
TELEX MESSAGE
FAX MESSAGE
RESET
Telefax adapter
QRPM 911 032
Weight: 0.6 kg
Main Control Unit (MCU)
QUFC 911 901-2
Weight: 4 kg
Saturn B
310 mm
236 mm
70 mm
Weight: 0.3 kg
Weight: 0.015 kg
210 mm
225 mm
20 mm
RJ11
16 mm
36 mm
22 mm
~180 mm
RJ11
35 mm
90 mm
228 mm
DISTRESS
ALARM
ACKNOWLEDGE
Nera Saturn B

12 Installation Manual
Saturn Bm
PLANNING
Physical characteristics of main units
Power Supply
QUFC 911 9032B
310 mm
195 mm
97 mm
750 mm
41
59
210
2020 155
Termination Box
QUFC 911 948
20
20
245
1919 105
20
20
125
2020 160
Conne tion Box
QUFC 911 918
200 mm
50 mm
170 mm
Telephone/telefax
wall so ket
R 906 676/1
Weight: 4.1 kg
Weight w/terminal clamp: 0.81 kg Weight: 0.6 kg
Weight: 0.04 kg
50 mm
57 mm
20 mm
RJ45
140 mm
65 mm
285 mm
Battery
terminal
clamp

13
Installation Manual
Saturn Bm PLANNING
Display
Handset
Telefax
Main Control
Unit
Power
Supply
Distress
Alarm
Telephone
Distress
Alarm
Message
Indicator
PC
(Telex)
Termination
Box
Remote installations
RF-Cable (to Antenna)
DISTRESS
ALARM
ACKNOWLEDGE
Nera Saturn B
Printer
Message Indi ator
Saturn B
DATA MESSAGE
TELEX MESSAGE
FAX MESSAGE
RESET
DISTRESS
ALARM
ACKNOWLEDGE
Nera Saturn B
Example of BDE installation

14 Installation Manual
Saturn Bm
Example of Saturn Bm installation with Display Handset, telefax, 4 telephones, 3 Distress
Alarm units, 2 Message Indicator units, PC (telex), printer and data equipment.
Re
P

7
8
9
4
5
6
1
2
3
S
0
#
R
5 4 3 2 1
9 8 7 6
25 24 23 22 21 20 19 18 17 16 15 14
13 12 11 10 9 8 7 6 5 4 3 2
1
1 2 3 4 5
6 7 8 9
(J1) (J2) (J3) (J4) (J5) (J13)
(J10)(J6) (P12) (J7)
(J11)
(J8) (P9)
5 4 3 2 1
9 8 7 6
ON
+ [11 - 34 VDC] -
OFF
HANDSET
EXT /O GYRO NMEA-0183 DTE
TEL.1 TEL.2 TEL.3 TEL.4 TEL.5
AUX
PC PR NTER
Radio Room
Bridge
Owner's Cabin Captain's Cabin
Saloon
TEL 2
TEL 1
TEL 3 TEL 4
TEL 5
HANDSET
Termination Box
QUFC 911 948
Address 1
Tele-
phone
Displ y
H ndset
Telef x
Telephone
Telephone
Telephone
EXT /O
PR NTER
PC
PC
(telex)
Printer
Mess ge
Indic tor
Unit Mess ge
Indic tor
Unit
Address 0
F x
d pter
DTE
Connection Box
QUFC 911 918
Gyro
N vig tion
GYRO
NMEA-0183
Address 4
D STRESS
Saturn B
ALARM
ACKNOWLEDGE
Message ndicator
Saturn B
DATA MESSAGE
TELEX MESSAGE
FAX MESSAGE
RESET
Message ndicator
Saturn B
DATA MESSAGE
TELEX MESSAGE
FAX MESSAGE
RESET
D t
Equipment
ALARM
ACKNOWLEDGE
Nera Saturn B
ALARM
ACKNOWLEDGE
Nera Saturn B
13
456
789
0
ABC
2
DEF
DATA
GH
JKL MNO PQR
STU VWX
TAX LGHT
YZÆ
SPCØÅ.
PLAY
ÄÖÜ
ESC DEL
ON/OFF LST
LST
FUNC ALPHA ENTER
SHFT MORE/
HELP LES
PTT
DIAL 00+INTL
TEL.NO.+
ON
SHFT BAT
ALPHA
PLANNING

15
Installation Manual
Saturn Bm PLANNING
Placing the Main Control Unit (MCU)
The Main Control Unit should be placed in a ventilated area. To ensure ad-
equate cooling of the MCU a 10 cm unobstructed space must be maintained
around all sides of the unit. See also "Recommended location of units".
Ambient temperature range 0° - 45° C.
The MCU is manufactured as a cabinet for wall or desktop installation with
dimensions as shown. The cabinet is equipped with a mounting plate. Four
holes through the mounting plate allows the unit to be secured to the wall.
Placing the Distress Alarm Unit
and the Message Indicator Unit (option)
Up to six (6) Distress Alarm Units and four (4) Mes-
sage Indicator Units may be connected in series.
The units may be installed anywhere onboard
the vessel, but near a dedicated Telephone or
PC Telex.
Max cable length: 100 m, 4x0.5 mm
2.
Placing the telephone(s)
Additional two-wire telephones can be installed
anywhere onboard the vessel. Five separate
telephone ports are available on the MCU.
Max. cable length 150 m, 0.5 mm
2
min.
DISTRESS
ALARM
ACKNOWLEDGE
Nera Saturn B
Message Indicator
N
SATURN B
DATA MESSAGE
TELEX MESSAGE
FAX MESSAGE
RESET
310 mm
70 mm
236 mm

16 Installation Manual
Saturn Bm
Placing the telefax (option)
TEL2 is configured for telefax as default.
However, any of the telephone ports can be
configured for telefax.
Max. cable length 150 m, 0.5 mm2min.
For connection directly to the MCU, use
telephone cable with grounding tail,
and employ fax adapter.
Placing the PC telex & serial printer (if equipped)
The PC Telex and Printer must be installed
close to the Main Control Unit.
Max. cable length 15 m, 0.5 mm2min.
Placing the DTE equipment connected to the DTE port
The equipment must be installed as close as
possible to the Main Control Unit.
Max. cable length 15 m, 0.5 mm2min. for ASD
1.5 m, 0.5 mm2min. for HSD
Requirements relating to GMDSS power supply
The ship earth station shall normally be powered
from the ship`s main source of electrical energy.
In addition, it shall be possible to operate the
ship earth station and all equipment necessary
for its normal functioning, including the antenna
tracking system, from an alternative source of
energy.
Changing from one source of supply to another
or any interruption up 60 secs of the supply of
electrical energy shall not render the equipment
inoperative or require the equipment to be manu-
ally re-initialized.
If provision is made for operating the equipment
from more than one source of electrical energy,
arrangements for rapidly changing from one
source to the other shall be provided but not
necessarily incorporated in the equipment.
PLANNING

17
Installation Manual
Saturn Bm
A successful installation of a maritime satellite terminal must take into
account the noisy environment in which the equipment shall operate.
Electrical noise The electrical environment on board a ship is usually quite noisy. Power-
ful electrical installations cause voltage variations and transients, as well
as low and high frequency noise. Radio and radar equipment radiate
radio frequency signals which frequently impregnate cables on board
with unwanted interference.
Ground plane Most ships have a steel hull. One should think that the steel construction
of the ship would constitute a good ground plane. This is often not quite
true. Rust, other forms of corrosion, paint and grease, often prevent a
good ground connection. A consequence of this is that high energy
power distribution on board a ship can cause significant ground potential
differences.
Antenna unit Adequate grounding of the Antenna Unit depends on the fastening bolts
making good contact with the top flange of the mast. This is obtained by
removing paint and using enclosed toothed washers and nuts.
Antenna cable The antenna coaxial cable normally has a solid or meshed metal screen
which must be terminated to ground both at the antenna pedestal and at
the MCU. The length of the cable can often be more than 40 metres. If
the ground potential level at the two points differ, the current passing
through the screen of the coaxial cable can be quite strong. The antenna
cable screen constitutes a heavy gauge wire, which is capable of con-
ducting large amounts of current.
If the ground lead from the MCU to the ship’s ground is of lighter gauge,
the MCU will be raised to a different ground potential.
Nera recommends that the antenna cable screen be clamped to ground
at the ship’s deck in such a way that the screen passes through the
grounded clamp before the coaxial cable is terminated locally. This will
confine any noise current caused by potential difference to the cable
screen. This method is far superior to grounding the shield using “pig tail”
ground jumpers. This principle of using shielded cables where the shields
are clamped to ground should be employed as far as possible to all
cables connected to the Saturn satellite terminal.
Below Decks Equipment The MCU must be provided with a good electrical connection to the
ship’s hull for grounding. This is obtained by using Termination Box
QUFC 911 948 as a common grounding point for MCU, external Power
Supply and Antenna Cable. (See Installation: "Location and grounding
of units: Example 1,Example 2 and Example 3".) Length of copper
foil/3 cm should not exceed 30 cm. Length of copper foil/10 cm should
not exceed 300 cm. The foil/10 cm should be connected to ship's hull
(deck or roof) by hard-soldering (or screws) to steel.
Mains power/ground Mains ground is secured to the common grounding point through the
external Power Supply. It is therefore important to use the same mains
branch for additional equipment connected to the MCU (Fax, PC, Printer
etc.).
PLANNING
Grounding considerations

18 Installation Manual
Saturn Bm
max. 3 m
gnd. connection
max. 30 cm
gnd. connection
max. 30 cm
Power
Supply
Desktop
MCU
max. 3 m
min.
10 cm
min.
20 cm
gnd. connection
max. 30 cm
gnd. connection
max. 30 cm
Desktop
MCU
Power
Supply
max. 3 m
min.
20 cm min.
20 cm
gnd. connection
max. 30 cm
Desktop
MCU
min.
10 cm
Termination Box
Termination Box
Termination Box
Power
Supply
PLANNING
Recommended location of units
Location of Below Decks Units for best
possible grounding
Example 1
see also INSTALLATION,
"Location and grounding of units, example 1".
Example 2
see also INSTALLATION:
"Location and grounding of units, example 2".
Example 3
see also INSTALLATION:
"Location and grounding of units, example 3".

19
Installation Manual
Saturn Bm PLANNING
Laying cables
General
At the Antenna Unit
At the Main Control Unit
Distress Alarm Unit/
Message Indicator Unit
Telephone and/or telefax
At the gyro
The coaxial cable for connection between the MCU and the Antenna Unit
should, if possible, be laid before the equipment arrives. Make sure sufficient
length of cable is ordered.
Where exposed to mechanical wear (on deck, through bulkheads etc.), the
cable should be protected by steel pipes. Standard procedures should other-
wise be followed for cabling in ship installations.
Special attention to existing safety regulations is required if the cable passes
through zones where there may be flammable or explosive gases. Use suit-
able gasproof cable glands or bushings.
Double screen 50 Ωcoaxial cable must be used. The maximum length of the
coaxial cable is limited by the DC and RF loss through the cable:
Maximum DC loss: R loop 0.6 ohm
Maximum RF attenuation at 1525-1660 MHz: < 10 dB
The table below lists suitable double screened coaxial cables between MCU and ADE:
A free end of approximately 1.5 m of the antenna cable above the radome
bottom should be provided for connection to the coaxial connector in accord-
ance with the installation instructions in "Connecting up Above Decks
Equipment".
The coaxial cable from the Antenna Unit should be given a free end of
approximately 0.5 m at the Termination Box location.
The prepared Distress Alarm / Message Indicator cable (2 m) with plug can
be connected directly to a locally installed unit, or to the Termination Box for
remote installation of unit(s). Provide remote cable with free ends of 0.5 m at
both ends.
Choose the position for the required wall sockets and lay the cables leaving a
free end of 0.5 m. Also allow a free end of 0.5 m at the Termination Box.
The gyro cable is terminated at the Termination Box. Allow a free end of
0.5 m. The amount of free cable required at the gyro depends on type to be
installed.
N/female
TNC
max. length
for 10dB/0.6
Antenna Cable
at the MCU
Antenna cable Reference Bending
radius
Suitable coaxial connectors
at the MCU at the A E
RG214 MIL-C-17 108 mm 25 m
129 mm 75 m
160 mm 95 m
275 mm 172 m
iameter
10.8 mm
12.9 mm
16.0 mm
27.5 mm
390 mm 225 m39.0 mm
500 mm 270 m50.0 mm
Pigtail
RPM 911 077-600
at the A E
11N-50-7-5
11N-50-10-4
+ pigtail 11N-50-10-4
S 10172 B-11
( TZC 502 012)
11N-50-7-5
+ pigtail
N/male N/male
11N-50-12-10
+ pigtail 11N-50-12-10
RF
1
/
2
 50
11N-50-23-10
+ pigtail 11N-50-23-10
RF
7
/
8
 50
RF 1
1
/
4
 50
Mounting the coaxial connector, see Appendices to
11N-50-32-2
+ pigtail 11N-50-32-2
RF 1
5
/
8
 50 11N-50-42-2
+ pigtail 11N-50-42-2

20 Installation Manual
Saturn Bm
Installation Procedure
INSTALLATION
Unpacking
Open all boxes supplied and check the contents with the enclosed packing
list. Inspect units and parts for possible transport damage.
Installing the Above Decks Equipment (ADE)
Preparations The ADE heading is marked on the radome. As assembled at the
factory, the access hatch is at the aft end. The horizontal orientation of the
antenna inside the radome can be adjusted at the factory prior to dispatch,
if so specified. The heading of the pedestal itself is where the coaxial cable
runs out of the post.
Installation on the The ADE is furnished with lifting lugs attached to four of the eight
antenna mast bolts on the radome, see figure below.
Attach straps or slings to the lifting lugs and hook them on to the crane
hook. (Note! Straps are not part of the delivery).
Remove the straps fastening the radome to the transport pallet.
Carefully start lifting the ADE.
WARNING! Personnel must not pass underneath the ADE during hoisting
operations.
Place the neoprene gasket on top of
the steel flange, or preferably
threaded onto the radome
bolts. Manoeuvre the ADE
into position directly
above the mast flange
before lowering it al-
most down to the flange.
WARNING! Watch your hands!
Install the ADE with the
heading mark pointing
forward.
Align the bolts extending
down from the bottom
with the holes through
the mast flange, and
lower the unit gently
until it rests on the mast.
Secure the ADE to the
mast flange using the
enclosed toothed wash-
ers and nuts. Tighten the
nuts applying a torque of
100 Nm.
Finally, remove the lifting
straps and the straps retain-
ing the antenna platform
inside radome during trans-
port.
Neoprene
gasket
LIFTING
STRAPS
Saturn B
To obtain good grounding,
remove paint from mast
in areas here nuts are
fastened to secure antenna
and radome. Use toothed
ashers included.
Lifting
lug
Toothed
washer
Nut