Nera Saturn Bt User manual

Saturn Bt Transportable
Technical Manual

1 Saturn Bp Portable – Technical Manual
Contents
Introduction
IntroductionIntroduction
Saturn Bp Portable ........................................................................................ 3
Connecting Up............................................................................................... 4
Connection of Optional Equipment................................................................ 4
Technical Data ............................................................................................... 5
The INMARSAT-B System............................................................................. 6
System Description
System DescriptionSystem Description
Saturn Bp Portable Communication .............................................................. 8
Signalling & Communication Channels ........................................................11
Communication Sequences......................................................................... 12
Idle State ..................................................................................................... 14
SCPC Signalling .......................................................................................... 16
Voice............................................................................................................ 18
Clearing ....................................................................................................... 20
Diagrams
DiagramsDiagrams
Block Diagram ............................................................................................. 22
Antenna Unit Interconnection Diagram........................................................ 23
MCU Interconnection Diagram .................................................................... 24
Service
ServiceService
Exploded View – Saturn Bp Trunk............................................................... 26
Exploded View – Saturn Bp Transceiver ..................................................... 27
Replacing Trunk Parts ................................................................................. 28
List of Spare Parts ....................................................................................... 33
Service Level Functions .............................................................................. 34
List of Alarm Messages ............................................................................... 35
List of Start-up Messages............................................................................ 36
List of Terminal Status Messages................................................................ 36
List of Clear Causes .................................................................................... 37
List of Terms ................................................................................................ 40
Doc. No. QLZB911025 Rev. A Infotema 5114 11/96
Nera SatCom AS reserves the right to change the design
and specifications of the equipment without notice.

2
Saturn Bt Transportable – Technical Manual
Introduction
IntroductionIntroductionSaturn Bt Transportable
General
Saturn Bt is a transportable Inmarsat-B terminal providing access to the international dial-up telephone, facsimile and data network.
All electronics and the sectionalized parabolic dish of Saturn Bt are contained in a single robust and compact transport case.
The RF Transceiver part and Antenna can be mounted on the transportation case or mounted on wall or roof with the mounting brack-
et enclosed in the transport case.
Transceiver
Antenna
Display
handset
Telephone Fax
(option) MCU Power Supply
Feeder
Antenna elements Wheels
Antenna mounting rod
Antenna bracket
Telephone
Coax cable
(feeder to Transceiver)
Drilling template
Transceiver
MCU
Feeder reflector
Compass
Power
supply
Display
handset
Cables &
accessories
Telefax
Pivot
Saturn Bt, complete Location of parts in the transport case

3 Saturn Bt Transportable – Technical Manual
Technical Data
Introduction
IntroductionIntroduction
Interfaces
Telephone/telefax: 5 x RJ11, 2-wire with echo cancelling and touch-tone dialling
Fax: CCITT G3 at 6400 bps
Data: D-sub, 25-pin female, 9600 bps,
RS-232, Hayes AT compatible
PC: D-sub, 9-pin female, RS-232
Printer: D-sub, 9-pin male, RS-232
Display Handset
LCD display: 2 x 12 characters
Weight: 0.35 kg
Dimensions in millimetres: W: 56, H: 214, D:47
Environmental Conditions
Operating temperature: -25°C to +55°C
Storage temperature: -50°C to +80°C
Humidity: 95% at 40°C
Rain: 50 mm/hour
Shock: 90 cm drop
Electromagnetic Compatibility
Radiated: EN55022
Conducted: EC 801
General
Saturn Bt Transportable complies with the INMARSAT-B System Definition Manual for a
Land Mobile Earth Station.
Operational Characteristics
• Assembly time < 60 seconds
• Antenna separation up to 90 meters
• 99 short numbers with alphanumeric names
• Last number redial
• Voice coding at 16 kbps
• Group III telefax at 9.6 kbps
• High Speed Data transfer at 64 kbps or 56 kbps
• Data modem transfer up to 9.6 kbps
Power Supply
AC power: Separate AC/DC converter
DC power: 11 - 34 VDC
Power consumption: Typically 28 W receive, 110 W transmit (total)
Carrying Case
Material Moulded polyethylene case
Contents: • Main Control Unit (MCU)
• Transceiver
• Display Handset
• Compass, and
• Cables
Weight : 30 kg
Dimensions in millimetres: W: 700, H: 300, D: 600
System Specifications
Transmit frequencies: 1626.5 MHz - 1646.5 MHz
EIRP: 33/25 dBW
RF channel spacing: 20 kHz
Antenna: Sectionalized parabolic reflector
Antenna diameter: 0.9 m
Polarization: Right-hand circular (RHC)
G/T: - 4 dB/K

4
Saturn Bt Transportable – Technical Manual
Introduction
IntroductionIntroductionSaturn Bt Transportable – Cabling Diagram
Outdoor Equipment ODE
Indoor Equipmet IDE
90 – 276 VAC
Standard
Telephone(s)
Max 5
12 VDC
DATA TLF.
UNADAPTER 401
Telefax
adapter
Standard
Telephone
and Telefax
without keypad
(option)
220 VAC
Telefax
with keypad
(option)
Message Indicator
N
SATURN B
DATAMESSAGE
TELEXMESSAGE
FAXMESSAGE
RESET
Message
Indicator
(option)
Transceiver
Transceiver
Wall or roof
Transceiver
Display
Handset
Main Control Unit
MCU
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL 00+INTL
TEL . NO . + f
Saturn B
Antenna
mounted on
wall or roof
Antenna
mounted on
transport case
Power supply
(option)

5 Saturn Bt Transportable – Technical Manual
MCU Connector Panel
Introduction
IntroductionIntroduction
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)
(P11)
(J8) (P9)
5 4 3 2 1
9 8 7 6
OFF
+[11 - 34 VDC] -
ON
HANDSET
EXT I/O GYRO NMEA-0183 DTE
TEL.1 TEL.2 TEL.3 TEL.4 TEL.5
AUX
PC PRINTER
Saturn B
Connectors:
Auxiliary
Telephones 1–5
(or telefax)
Extensions
Telephone display handset
Gyro
Navigator NMEA-183
PC (control/telex)
PC printer
PC (data)
Antenna cable
Power
Power ON/OFF
Power indicator

6
Saturn Bt Transportable – Technical Manual
The INMARSAT-B System System Description System DescriptionSystem Description
Figure 1.
Overview of the Inmarsat-B system. Figure 2.
Four satellites in a geostationary orbit above the
equator at approx. 35700 km altitude.
LES
NCS
MES
TELEPHONE
NETWORKS
NCS: Network Coordinating Station
LES: Land Earth Station
MES: Mobile Earth Station
(Saturn B terminal)
MES
DATA
NETWORKS
TELEX
NETWORKS
Re
P
–
7
8
9
4
5
6
1
2
3
✳
0
#
R
Transceiver
E
Q
U
A
T
O
R
EARTH
12000 km
35700 km
Pacific Ocean Region
Indian Ocean Region
55.5°W
63°E
179°E
18.5°W
Atlantic Ocean Region (West)
Atlantic Ocean Region (East)
Inmarsat
The INMARSAT-B system offers high quality 16 kbps
voice communication, and 9.6 kbps telefax and data
transmission.
The benefit of the INMARSAT system is its high
capacity, and the rapid and reliable connection
between the land based (fixed) users and the Mobile
Earth Stations (MESs).
The large number of Land Earth Stations (LESs) in
operation allows the operator to select the one giving
the lowest cost to a particular land based subscriber.
Each satellite region is under the control of a Net-
work Coordinating Station (NCS), which controls
and monitors the traffic between the MESs and the
LESs.
See figure 1.
Services
• Duplex telephone calls – basic telephony services
• Simplex telephone calls – LES-to-mobile only
• Duplex telefax – CCITT Group 3 facsimile servic-
es, 9.6 kbps
• Simplex telefax calls – LES-to-mobile only
• Simplex group ID addressing – to a selected
group of mobiles
• Simplex area addressing – to all mobiles within a
specific geographic area
• Duplex data communication – Hayes compatible
9.6 kbps data service
System Satellites
The satellites are positioned in a geostationary orbit
above the equator at approximately 35700 km alti-
tude.
In geostationary orbit, each satellite moves at the
same rate as the earth, and so remains in the same
relative position to the earth, above equator, allowing
the antenna to have line-of-sight communication with
the satellite.
The Saturn Bt Transportable can communicate via
the four satellites covering one Ocean Region each.
The positions of the system satellites are shown in
figure 2.
Transmission frequencies
The INMARSAT-B MESs operate in the following
frequency bands:
Calls from Saturn B terminals 1626.5 MHz — 1646.5 MHz
Calls to Saturn B terminals 1530.0 MHz — 1559.0 MHz
A large number of channels are available (20 kHz
channel separation), offering either 16 kbps voice
communication, or 9.6 kbps duplex data communica-
tion.
Duplex communication uses two channel frequen-
cies, one in each direction.
The LESs provide interface to the international
networks for telephony and data: PSTN (Public
Switched Telephone Networks) and PSDN (Packet
Switched Data Networks).

7 Saturn Bt Transportable – Technical Manual
System Description
System DescriptionSystem Description The INMARSAT-B System Cont’d
Figure 3.
Communication path.
Saturn Bt
Transportable Land Earth
Station
LES
Display handset
Path established by
Saturn Bt terminal
via satellite. PC
w/modem
Additional standard telephones
Telefax
Data/modem communication (option)
Public
Telephone
Network
Telefax
Re
P
–
7
8
9
4
5
6
1
2
3
✳
0
#
R
Transceiver
Channel numbers
All radio frequency channels used by the MES are
assigned a particular hexadecimal number which is
translated into frequencies on L-band between MES
and satellite, and to C-band between LES and satel-
lite.
Channel no. 32C8 for an MES always designates:
1660.5000 MHz transmitting frequency
1542.5000 receiving frequency
Channel Types
The Inmarsat-B System differs between physical and
functional channels. A physical channel refers to one
frequency, one carrier. Every frequency can have
several functional channels muliplexed on it. Each
functional channel is named after the originating unit.
The NCS TDM will in the initial system multiplex the
NCSC for Bulletin Boards and Call Announcement,
the NCSA for Channel Assignments and NCSI for
Interstation information to the LES on the same
physical channel. When the system expands, spot
beams and Ocean Region Registration will be intro-
duced using the functional channels NCSS and
NCRA multiplexed on the NCS TDM. The traffic on
one TDM may then be to heavy and some of the
functional channels may be moved to another NCS
TDM frequency.
The physical SCPC channels are always divided into
three functional channels. During call set up and
release the whole bandwith is used for signalling and
the functional channel is called MES-SIG/LES-SIG.
During speech or data phase, the signalling part of
the channel is called VSUB or DSUB and the service
carrying part is called MESV/LESV or MESD/LESD.
Requests and assignments
The Network Coordinating Station in each Ocean
Region continually transmits to the MESs within its
region on the NCS Common Signalling Channel
(NCSC).
When selecting a particular Ocean Region, the MES
automatically tunes its receiver to the NCSC fre-
quency, and awaits System Information from the
NCS.
The System Information (Bulletin Board) includes
available NCS/LES channel frequencies, location of
satellites, operational status, etc.
When the NCS sends a Call Announcement, detail-
ing the channel to which the MES should tune to
receive the call.
When the MES user dials a subscriber’s international
telephone number, the MES transmits an Access
Request to the NCS via the LES, and awaits a Chan-
nel Assignment from the NCS.
Telephone communication
For telephone communication a Frequency Division
Multiple Access (FDMA) is used, in a Single Channel
Per Carrier (SCPC) system. The voice communica-
tion occupies two (unpaired) channel frequencies.
The telephone channels are controlled by NCS which
assigns a free channel upon request. When a chan-
nel has been assigned it is controlled by LES until
end of call.
Facsimile communication
The Saturn Bt telephone ports may be configured for
telefax communication. The transmission is telefax
only, and is performed at a rate of 9.6 kbps.
Telefaxes without keypad may be connected via an
adapter.
Data communication
The data service allows the Saturn Bt user to com-
municate at up to 56/64 kbps, via the public switched
network, to fixed modems and data terminals.

8
Saturn Bt Transportable – Technical Manual
Saturn Bt Transportable Communication System Description System DescriptionSystem Description
Calls from Mobiles
To initiate a call, the user dials the international call prefix
00 prior to the telephone number for the required destina-
tion. The LES code is also included, either automatically
when using the default LES, or manually selected from the
Display Handset.
The mobile automatically includes information to identify
the MES and the particular end terminal that originates the
call. Saturn Bt has six connections: the Display Handset
and five connectors that are normally configured for stand-
ard telephone and a telefax.
The LES uses the end terminal identifying information (OI)
for billing purposes.
The mobile transmits the dialling information on a channel
specially assigned by the NCS, to the LES, which also has
been instructed to tune to the same channel.
On receiving the call, LES routes it over the public tele-
communications networks to the intended destination.
When the destination responds, for example by the dialled
subscriber lifting the handset, the call proceeds.
The illustration of the call initiation is simplified.
PSTN
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL00+INTL
TEL. NO . + f
00 47 66 8447 00 f
Calls from Mobiles
Forward/return ID
123456/ABCDEF OI
1Type Voice
Commissioned
Yes
6684 4700
LES
Return ID
Type
2
ABCDEF
Voice
Access Request
When the MES originates a call it starts
by sending a request to the LES. This
initial request for service contains the
MES Return ID and type of service.
Saturn Bt incorporates a configuration
table for originating information,
accessible through the “Configure Ports”
function (70). This table contains one
entry for every physical connector with
the Originating Id and type of service for
that specific connector.
LES Translation Table
MES Translation Table
1 2 3
4 5 6
7 8 9
0 #
P S Re
Fwd ID
Rx ch.
Tx ch.
123456
8192
12000
Transceiver
Channel assignment
Connector
Service/
Originating Id
Phone/OI=1
Phone/OI=2
Fax/OI=17
Default=no OI
Default=no OI
Default=no OI
HANDSET
TEL.1
TEL.2
TEL.3
TEL.4
TEL.5
LES=2
☞
Re
P
–
7
8
9
4
5
6
1
2
3
✳
0
#
R

9 Saturn Bt Transportable – Technical Manual
System Description
System DescriptionSystem Description Saturn Bt Transportable Communication Cont’d
Calls to Mobiles
Calls are made as ordinary international (Satellite) calls
where each Ocean Region has an international country
code. If an area is covered by more than one satellite, it is
necessary that the caller knows which satellite (Ocean
Region) the mobile is tuned to.
The international codes to the four Ocean Regions are as
follows:
Atlantic Ocean East Region: 871
Pacific Ocean Region: 872
Indian Ocean Region: 873
Atlantic Ocean West Region: 874
The illustration of the call initiation is simplified.
Re
P
–
7
8
9
4
5
6
1
2
3
✳
0
#
R
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL00+INTL
TEL. NO . + f
Calls to Mobiles
00871 681234567
When requested to call a specific IMN, LES translates
the IMN to a Forward ID and a Destination Id (DI). The
request is then sent to the MES which translates the
Forward ID and the DI to a physical line to call.
To "connect" a Destination Id to a physical line,
SaturnBt incorporates a translation table accessible
through the “Incoming call route” function (71).
This table can contain up to 100 DI translations, and
each DI in use is programmed with type of call and
destination.
A call is not allowed to be routed to a connector that is
configured to another type than the DI specifies.
A telephone DI can only be routed to a phone type
connector type. A facsimile DI can only be routed to a
fax type connector.
Forward/return ID
123456/ABCDEF
123456/ABCDEF
123456/ABCDEF
DI
01
02
17
Type
Voice
Voice
Fax
IMN
681234567
681234789
681234890
LES Translation Table
MES Translation Table
☞
123
456
789
0 #
P S Re
Transceiver
Connector
Service/
Originating Id
Phone/OI=1
Phone/OI=2
Fax/OI=17
Default=no OI
Default=no OI
Default=no OI
HANDSET
TEL.1
TEL.2
TEL.3
TEL.4
TEL.5
LES
Return ID
Type
2
ABCDEF
Voice
Response
LES
Fwd ID
Type
DI
2
123456
Voice
1
Call announcement
LES=2

10
Saturn Bt Transportable – Technical Manual
System Description
System DescriptionSystem Description

11 Saturn Bt Transportable – Technical Manual
NCS Common Ch (NCSC)
NCS Assignment Ch (NCSA)
NCS Registration (NCRA)
NCS Spot beam (NCSS)
MES
Saturn Bt
Portable
terminal.
MES Request Ch (MESRQ)
MES Region Registration Ch (MESRR)
MES Call Acknowledge Ch (MESCA)
SCPC In-band Signalling (MESSIG)
SCPC In-band Signalling (LESSIG)
SCPC Voice (MESV/VSUB)
SCPC Voice (LESV/VSUB)
SCPC Data (MESD/DSUB)
SCPC Data (LESD/DSUB)
LES
The Land Earth Station
routes messages to/from
the MESs within the
coverage area of one of
the four Inmarsat
satellites.
NCS/NCS
Signalling Links
NCS
The Network Coordinating
Station controls the satellite
resources to LESs and
MESs within a single
satellite coverage area.
MES Region Registration Ch (MESRR)
MES Response Ch (MESRP)
MES Request Ch (MESRQ)
NCS Interstation Ch (NCSI)
LES Interstation Ch (LESI)
Signalling Channels
Communication Channels
(SCPC = Single Channel Per Carrier)
Public Switched
Telephone
Networks
ISDN
Packet Switched
Data Networks
Transceiver
Communication Channels
Designation Transmission Type of information
LESV
MESV
LESD
MESD
SCPC with Duplex 16 kbps voice
VSUB sub-band communication
signalling
SCPC with Duplex 9.6 kbps data
VSUB sub-band communication
signalling
Signalling & Communication Channels
System Description
System DescriptionSystem Description
Signalling Channels
Designation Transmission Type of information
NCSI
LESI
NCSC
MESRP
NCSA
MESRQ
MESCA
NCSS
MESRR
NCRA
MESSIG
LESSIG
Continuous TDM Bi-directional signalling information
between LES and NCS
TDM Bulletin Board announcements.
TDMA MES responses
Continuous TDM Assigns SPCS channels
Slotted Aloha Request from MES to LES
Slotted Aloha Acknowledges shore-originated
simplex calls.
Continuous TDM One frequency per spot beam;
enables an MES to identify beam
serving location.
Slotted Aloha Registration signal to LES/NCS.
Continuous TDM Acknowledgement from NCS to
MES
SCPC In-band signalling

12
Saturn Bt Transportable – Technical Manual
Listens to NCS common
channel.
LES
Land Earth Station
NCS
Network
Coordination
Station
NCS Common Channel
OFF-HOOK
MES operator dials
subscriber’s international
telephone number.
Transmits "Access Request"
SU.
MES
Mobile Earth Station
MESRQ
Adds MES to NCS
busy list.
Transmits "Channel
Assignment" SU.
NCSA:
Once for maritime
MES. Three times for
Land mobile MES.
Adds MES to LES
busy list.
"Request for Channel
Assignment" SU
NCSI
NCSA
Sets SCPC channel in "In-
band Signalling" mode.
Transmits "Service Address"
SUs and "Scrambling Vector
Advice" SU alternately.
MES-SIG
LESI
For call release, see
separate diagram
Returns "Scrambling
Vector Acknowledge"
SU.
LES-SIG
MES-SIG
Changes to
LESV/SUB mode.
"Return Carrier Identifier"
SUs
Changes to MESV/SUB
mode
Transmits "Ringing
Tone" & "Fill-in" SUs.
"Ringing tones"
Sends answer signal
& "LES Connect" SUss
"Fill-in" SUs when
quiet.
Maintains burst SU
every 5 secs to
prevent clearing by
MES.
Transmits "MES
Connect" SUs.
Transmits speech
and "MES Connect"
SUs continuously.
LESV & SUB
SUB
LES Voice Channel
and sub-band
signalling
Terrestrial call set-up
procedure.
SUB
INMARSAT-B
MES-originated Duplex Telephone Call
Set-up
SCPC In-band Signalling Mode
SCPC Voice Mode
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL00+INTL
TEL. NO . + f
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL00+INTL
TEL. NO . + f
ESC
☞
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL00+INTL
TEL. NO . + f
SUB
Transceiver
Re
P
–
7
8
9
4
5
6
1
2
3
✳
0
#
R
Set-up
SCPC In-band Signalling
SCPC Voice Mode
Listens to NCS common
channel.
NCS Common Channel
MES number from
telephone network.
Validates MES
authorization.
Adds MES to LES
busy list. "Request
for Call
Announcement" SU.
NCSI
NCSA
LESI
NCSC
Transmits "Channel
Assignment" SU.
NSCA: Once for
maritime MES. Three
times for Land
mobile MES.
MESRP
Transmits "MES
Response" SU on the
TDMA channel.
Adds MES to NCS
busy list.
"Call Announcement"
SU. Repeated once if
no response from
Land Mobile MES.
MES
Mobile Earth Station
LES
Land Earth Station
NCS
Network
Coordination
Station
For call release, see
separate diagram
Sets SCPC channel in "In-
band Signalling" mode.
Transmits "Scrambling
Vector Advice" SU
repeatedly.
MES-SIG
Returns
"Scrambling Vector
Acknowledge" SUs
repeatedly.
LES-SIG
RINGING
Ringing tone
(generated by LES)
MES-SIG
Transmits "Return Carrier
Identifier" SUs.
Switches to MESV/SUB
mode
OFF-HOOK
Transmits "Connect" SUs
"Fill-in" SUs when
quiet.
Maintains burst SU
every 5 secs to
prevent clearing by
LES.
Transmits speech
and "MES Connect"
SUs continuously.
SUB
SUB
INMARSAT-B
Fixed-originated Duplex Telephone Call
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL00+INTL
TEL. NO . + f
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL00+INTL
TEL. NO . + f
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL00+INTL
TEL. NO . + f
ESC
☞
Transceiver
Re
P
–
7
8
9
4
5
6
1
2
3
✳
0
#
R
Re
P
–
7
8
9
4
5
6
1
2
3
✳
0
#
R
System Description
System DescriptionSystem DescriptionCommunication Sequences

13 Saturn Bt Transportable – Technical Manual
System Description
System DescriptionSystem Description Communication Sequences Cont’d
LES
Land Earth Station
NCS
Network
Coordination
Station
MES
Mobile Earth Station
Switches to "In-band
signalling" mode and
sends channel
release SUs.
(Delay up to 2 min if
called party)
Terrestrial side
ON-HOOK
ON-HOOK.
MES switches to "In-band
signalling" mode and sends
6 frames of "Channel
Release" SUs,
then turns off carrier.
MES-SIG
Clear forward.
Observes MES
carrier off, then turns
off LES carrier and
sends "Notification of
Channel Release"
SU to NCS.
Removes MES from
LES busy list.
LESI
Removes MES from
NCS busy list, and
updates channel
status table.
LES-SIG
LESI
Removes MES from
NCS busy list, and
updates channel
status table.
ON-HOOK.
MES switches to "In-band
signalling" mode and
sends 6 frames of
channel release SUs,
then turns carrier off.
MES-SIG
Observes MES
carrier off, then turns
off LES carrier and
sends "Notification of
Channel Release"
SU to NCS.
Removes MES from
LES busy list.
INMARSAT-B
MES or Fixed Call Release
Voice Mode
Signalling Mode
Voice Mode
Signalling Mode
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL00+INTL
TEL. NO . + f
ESC
☞
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL00+INTL
TEL. NO . + f
ESC
☞
Transceiver
Re
P
–
7
8
9
4
5
6
1
2
3
✳
0
#
R

14
Saturn Bt Transportable – Technical Manual
BDE
Idle State System Description System DescriptionSystem Description
MAIN CONTROL BOARD
Digital Signal Processor Sub-system
Telephony
Interface Computer
Codec
RXIF
12 MHz
Transmitter
Combiner/
splitter
Local
Oscillator
Synthesizer
Receiver
RF Sub-system
RX Channel
1530 -
1559 MHz
TXIF
2.5 MHz
TX Channel
1626.5 -
1646.5 MHz
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL 00+INTL
TEL . NO . + f

15 Saturn Bt Transportable – Technical Manual
NCS Common Channel (NCSC)
ADE
shift shift
shiftshift
shift
t
BPSK Encoded Signal
(BPSK = Binary Phase Shift Keying)
Forward Direction
MES NCS
System Description
System DescriptionSystem Description Idle State
MULTI
FRAME
TIMESLOT
7
FRAMING
BITS
32
RATE - 1/2 FEC CODED BITSTREAM
1552 bits
FRAMING
BITS
32
RATE - 1/2 FEC CODED BITSTREAM
1552 bits
Approx. 264 ms
FRAMING
BITS
32 RATE - 1/2 FEC CODED BITSTREAM
1552 bits
8 bits96 bits
TIMESLOT
6
96 bits
TIMESLOT
5
96 bits
TIMESLOT
4
96 bits
TIMESLOT
3
96 bits
TIMESLOT
2
96 bits
TIMESLOT
1
96 bits
TIMESLOT
0
96 bits
Approx. 264 ms
OCTET No.
1
2
3
4
5
6
7
8
9
10
11
12
8 7 6 5 4 3 2 1
BIT No.
SIGNALLING UNIT – SU
CCITT CRC
(CYCLIC REDUNDENCY CHECK)
MES ID LES ID
SPARE
PRIORITY
SPARE
CHANNEL
PARAMETERS
MESSAGE
TYPE
Octet No. 1 Octet No. 2 Octet No. 3 Octet No. 4 Octet No. 5 Octet No. 6 Octet No. 7 Octet No. 8 Octet No. 9 Octet No. 10 Octet No. 11 Octet No. 12
SIGNALLING UNIT = 12 "OCTETS" = 96 BITS
EXAMPLE: CALL ANNOUNCEMENT (TYPE 81
H
)
81H
SERVICE
NATURE
SRVICE
TYPE
ECHDDH18H09H00H01H01H
DESTINATION
TERMINAL ID
01H
SPARE
MESSAGE
NUMBER
00H54H26H
100000011110110011011101000110000000100100000000000000010000000100000001000000000101010000100110
Message type
MES ID
LES ID
channel parameters
destination terminal ID
CCITT CRC
priorityspare spare
service nature service type
spare message number
81
M1
CALLANNOUNCEMENT
Right Hand Circular
polarized RF signal
f = 1530 - 1559 MHz
Duplexer
RF Units
HPA
Combiner/splitter
LNA

16
Saturn Bt Transportable – Technical Manual
BDE
SCPC Signalling System Description System DescriptionSystem Description
MAIN CONTROL BOARD
Digital Signal Processor Sub-system
Telephony
Interface Computer
Codec
RXIF
12 MHz
Transmitter
Combiner/
splitter
Local
Oscillator
Synthesizer
Receiver
RF Sub-system
RX Channel
1530 -
1559 MHz
TXIF
2.5 MHz
TX Channel
1626.5 -
1646.5 MHz
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL 00+INTL
TEL . NO . + f

17 Saturn Bt Transportable – Technical Manual
O-QPSK Encoded Signal
(O-QPSK = Offset Quadrature Phase Shift Keying)
t
0°+90°+270°+180°0°+90°+270°+180°
SCPC Channel (Single Carrier Per Channel)
In-band Signalling Mode
Forward Direction
MES LES
ADE
* Unique Word:
0111 1000 1001
for 1st subframe, and
1000 0111 0110
for 2nd, 3rd and 4th
subframe (compliment)
DUMMY
CW
24 bits
SUB
32 bits SU1
60 ms
* UW
24 bits
FLUSH
8
bits
FLUSH
DUMMY
6 bits
Before FEC
coding
6 bits
SU1SU1
96 BIT
SIGNALLING UNIT
384 bits
8
bits
SU
SUBFRAME - 4
SU
SUBFRAME - 3
SU
SUBFRAME - 2
SU
SUBFRAME - 1
60 ms 60 ms 60 ms 60 ms
n x 240 ms
END OF
DATA
192 bits
CONTIN.
WAVE
96 bits
BIT
TIMING
64 bits IN-BAND SIGNALLING FRAME
1920 bits IN-BAND SIGNALLING FRAME 1920 bits
240 ms240 ms 24 ms
OCTET No.
1
2
3
4
5
6
7
8
9
10
11
12
8 7 6 5 4 3 2 1
BIT No.
SIGNALLING UNIT – SU
CCITT CRC
(CYCLIC REDUNDENCY CHECK)
SPARE
(Random binary bits)
MES IDMESSAGE
TYPE
Octet No. 1 Octet No. 2 Octet No. 3 Octet No. 4 Octet No. 5 Octet No. 6 Octet No. 7 Octet No. 8 Octet No. 9 Octet No. 10 Octet No. 11 Octet No. 12
SIGNAL UNITS = 12 "OCTETS" = 96 BIT SIGNALLING UNIT.
EXAMPLE: SCRAMBLING VECTOR ACKNOWLEDGE
95
H
4A
H
09
H
EC
H
DD
H
18
H
09
H
F1
H
BC
H
06
H
79
H
D5
H
LES ID
LES_SIG
SIGNALLING
CHANNEL
100101011110110011011101000110000000100111110001101111000000011001111001110101010100101000001001
Message type
MES ID
LES ID
CCITT CRC
spare
95
M21
SCRAMBLING VECTOR ACKNOWLEDGE
System Description
System DescriptionSystem Description SCPC Signalling
Right Hand Circular
polarized RF signal
f = 1530 - 1559 MHz
Duplexer
RF Units
HPA
Combiner/splitter
LNA

18
Saturn Bt Transportable – Technical Manual
BDE
Voice System Description System DescriptionSystem Description
MAIN CONTROL BOARD
Digital Signal Processor Sub-system
Telephony
Interface Computer
Codec
Transmitter
Combiner/
splitter
Local
Oscillator
Synthesizer
Receiver
RF Sub-system
TX Channel
1626.5 -
1646.5 MHz
RXIF
12 MHz
RX Channel
1530 -
1559 MHz
TXIF
2.5 MHz
6
123
45
#
789
*
0
DEL
FUNC ALPHA ENTER
MORE/
HELP SHIFT LES
ON/OFF
DIAL 00+INTL
TEL . NO . + f