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 TM 11-5895-1847-12&P
OPERATOR AND UNIT MAINTENANCE
LCU 2000 GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM
GMDSS MAJOR COMPONENT EQUIPMENT DATA
Table 1. Watch Receiver.
Size
10.4 in. wide x 3.82 in. high x 10.4 in. deep
Weight
5 lbs
Type Acceptance
Complies with CFR 47, Part 80, Subpart W, para 80.101
Operating Frequencies
2187.5, 8414.5, 4207.5, 6312, 12577, and 16804.5 khz
Scan Watch
All frequencies within two seconds.
Mode of Reception
F1B, J2B
Sensitivity
Error rate 1 x 10 (exp -2) or less than 1uv
Stability
= or - 10 hz
270 to 300 hz (-6 db)
Line Output
600 ohm balanced, -10 dbm to +10 dbm
Ambient Temperature
-20 degrees C to +55 degrees C
Interconnect
SEABUSS (SEA 330 Protocol)
Fully synthesized, double conversion. 45 mhz 1st I.F., 6.3983 mhz 2nd I.F.
Primary Voltage
10 to 14 vdc
Current Drain
750 ma
Table 2. INMARSAT-C.
Size
214 mam wide, 62 mam high, 279 mam deep
Weight
3.2 kg
General Specifications
Meets or exceeds all INMARSAT specifications for the INMARSAT-C
network and GMDSS requirements.
Transmit Frequency
1626.5 to 1646.5 mhz
Receive Frequency
1530.0 to 1545.0 mhz
Channel Spacing
5 khz
Modulation
1200 symbols/sec BPSK
Ambiguity Resolution
Unique word
Coding
R 1/2 K=7 convolutional code, (interleaved code symbols RX)
Data Rate
600 bit/sec
RX Frame Length
8.64 seconds
TX Signalling Access Mode
Slotted ALOHA
0004 00 1
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