Appendix A
System Specifications
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MeetsallInmarsatspecificationsfortheInmarsatmini-CNetworkforLand-mobileand
Maritimeterminals.(R&TTE)
TransmitFrequency
1626.5to1660.5MHznote1
ReceiveFrequency
1525.0to1559.0MHznote1
ChannelSpacing
5/2.5/1.25kHz
Modulation
1200symbols/secBPSK
AmbiguityResolution
Uniqueword
Coding
R
1
/
2
K=7convolutionalcode(interleavedcode
symbolsRX)
DataRate
600bits/sec
RXFrameLength
8.64seconds
TXSignallingAccessMode
SlottedALOHA
TXMessageChannel
TDMA&FDMA,interleavedcodesymbols
TerminalInterface
EIA/TIA-232-EDTEinterface.CCITTRec.V.24/28,
4800-115000baudIA-5code
I/OInterface
SixdedicatedIn/Outpins
Opencollector.Sinks25mAeach
SystemSet-up
S-RAMBatterybackup
DCPowerSource
10.5to32VfloatingDC
Maxlimit:100VA
Maxcurrent:4A
Maxpower:32W
RX:1.8W,TX:23W@12Vsupply
Fuse
Self-recoveringPolyfuse
Temperature
Operating:-31
º
Fto131
º
F(-35
º
Cto55
º
C)
Storage:-40
º
Fto175
º
F(-40
º
Cto80
º
C)
Dimensions
6.4"(163mm)dia;5.75"(143mm)high
Weight
2.4lbs(1.1kg)
Note1.Inmarsatfrequencies:TX:1626.5-1646.5MHz;RX:1525-1545MHz
SystemSpecifications
A-1
34-0002Rev.D