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Appendix A
System Specifications
G G e e n n e e r r a a l l S S p p e e c c i i f f i i c c a a t t i i o o n n s s
Meets all Inmarsat specifications for the Inmarsat mini-C Network for Land-mobile and
Maritime terminals. (R&TTE)
Transmit Frequency
Receive Frequency
Channel Spacing
Modulation
Ambiguity Resolution
Coding
Data Rate
RX Frame Length
TX Signalling Access Mode
TX Message Channel
Terminal Interface
I/O Interface
System Set-up
DC Power Source
Fuse
Temperature
Dimensions
Weight
Note 1. Inmarsat frequencies: TX: 1626.5-1646.5 MHz; RX: 1525 -1545 MHz
34-0002 Rev. D
1626.5 to 1660.5 MHz
1525.0 to 1559.0 MHz
5/2.5/1.25 kHz
1200 symbols/sec BPSK
Unique word
R
1
/
K=7 convolutional code (interleaved code
2
symbols RX)
600 bits/sec
8.64 seconds
Slotted ALOHA
TDMA & FDMA, interleaved code symbols
EIA/TIA-232-E DTE interface. CCITT Rec.V.24/28,
4800-115000 baud IA-5 code
Six dedicated In/Out pins
Open collector. Sinks 25 mA each
S-RAM Battery backup
10.5 to 32 V floating DC
Max limit: 100 VA
Max current: 4 A
Max power: 32 W
RX: 1.8 W, TX: 23 W @ 12V supply
Self-recovering Poly fuse
º
Operating: -31
F to 131
º
Storage: -40
F to 175
6.4" (163 mm) dia; 5.75" (143 mm) high
2.4 lbs (1.1 kg)
System Specifications
note 1
note 1
º
º
º
F (-35
C to 55
C)
º
º
º
F (-40
C to 80
C)
A-1
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