Sailor Inmarsat B, Руководство по ремонту

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1 INTRODUCTION Inmarsat B
PAGE 1-4 9936
1.2 TECHNICAL DATA
Designation: SAT-B Ship Earth Station (SES) maritime class 1 with area group call capability and
normal tuning range, designed according to Inmarsat B System Definition Manual and
GMDSS requirements.
Configuration: SAT-B antenna SA4415
SAT-B transceiver, 24V ST4425 B/C
Control handset SC4345
Control unit, desk/bulkhead SC4350
Distress key SP4360
Interconnection: SAT-B antenna (ADE) to SAT-B transceiver (BDE):
Single coaxial cable (RG 214) up to 100 m carrying Rx/Tx IF signals (21.4/62.9 MHz),
data (4.8 kbit/s half duplex), 40.32 MHz reference signal and ADE power (40V DC).
SAT-B transceiver (BDE) to control handset and/or control units:
Multiconductor cable (8*0.25 mm
2
+ screen) up to 300 m implementing Scanbus
interface (LAN 76.8 kbit/s, ISOOSI 1-4), audio (Rx/Tx audio signal, 0 dBm) and power
(24V DC).
Services: Telephony incl. echo cancellation and DTMF signalling (APC vocoder, 16 kbit/s).
Telex (ITA-2, 50 baud).
Data communication (Hayes compatible (AT), 9.6 kbit/s).
Facsimile (CCITT group 3, 9.6 kbit/s).
Optional:
High speed data communication (56/64 kbit/s),
All modes available as duplex and fixed-originated simplex.
External I/F: Scanbus:
(DB-9 connector) Connection of control unit.
NMEA:
(DB-9 connector) Connection of 2-wire NMEA to GPS and GYRO.
DATA: (DB-9 connector) Connection of personal computer.
1 asynchronous serial (high speed) DTE/DCE port (9.6, 56, 64 kbit/s)
according to CCITT Rec. V.11 and X.27.
PC/Printer: (DB-15 connector) Connection of personal computer and printer.
1 asynchronous serial DTE/DCE port (50 baud telex and 9.6 kbit/s data)
according to CCITT Rec.V.24.
1 asynchronous serial DTE/DCE port (printer) according to CCITT Rec.
V24.
Alarm: (DB-15 connector) Connection of alarm unit and alarm indicating unit.
Phone1: (RJ-11 connector) 2W phone/PABX/FAX interface.
Phone2: (RJ-11 connector) 2W phone/PABX/FAX interface.
Antenna: Parabolic dish antenna for RHCP signals (21 dBi gain) with active stabilisation on 3
axes (azimuth, elevation and cross elevation) using rate sensors, inclinometers, and
signal strength tracking.
Transmission: 1626.5 - 1646.5 MHz (normal maritime tuning range, 20 kHz channel spacing for voice
communication).
EIRP = 25, 29, 33 dBW.
Reception: 1525 - 1545 MHz (normal maritime tuning range, 20 kHz channel spacing for voice
communication).
G/T = -4 dB/K.
Modulation: TX 24,132 kbit/s O-QPSK
RX 6 kbit/s BPSK, 24/132 kbit/s O-QPSK.
Coding: FEC convolution coding and 8 level soft decision Viterbi decoding (k = 7) and
(R = 1/2 , 3/4).
For high speed data, a sequential decoder with k = 36 and R = 1/2 is used.
Power Supply: Supply voltage: 24V DC +30/-10%.
Power consumption: TX/RX =250/120W
Environments: SAT-B antenna:
Temperature range: -25 to +55 °C.
SAT-B transceiver:
Temperature range: -15 to +55 °C.
Roll, pitch and yaw: ± 30° (T = 8 s), ± 10° (T = 6 s), ± 8° (T = 50 s)
Turning rate: ± 6 deg/s
Size and weight: SAT-B antenna:
H*W = 1410 mm * 1250 mm
M = 129 kg.
SAT-B transceiver:
H*W*D = 132 mm * 370 mm * 267 mm
M = 8.7 kg
Control handset:
H*L*B = 67 mm * 219 mm ‘ 70 mm
M = 1.2 kg
Control unit:
H*B*D = 100 mm * 200 mm * 120 mm
M = 0.8 kg