Sat-m – Wavecom W61PC V7.5.0 User Manual
Page 224
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Transmission Modes
WAVECOM Decoder W61PC/LAN Manual V7.5
NAVAREA
NAV
MET
SAR
OCEAN REGION
V (Brazil)
X
X
X
AOR-E
VI (Argentina)
X
X
X
AOR-W
VII (South Africa)
X
X
X
AOR-E + IOR
VIII (India/Mauritius/La Reu-
nion)
X
X (Note 3)
X
IOR
IX (Pakistan)
X
X
X
IOR
X (Australia)
X
X
X
IOR + POR
XI (Japan/China)
X
X
X
IOR + POR
XII (USA)
X
X
X
POR + AOR-W
XIII (Russian Federation)
X
X (Note 4)
POR
XIV (New Zealand)
X
X
X
POR
XV (Chile)
X
X
X
AOR-W
XVI (Peru/USA)
X
X
X
AOR-W
1. X = Full Service now available.
2. IMO has decided that routine broadcasts of navigational warnings and meteorological forecasts will be
made at scheduled times over a single nominated satellite for each
NAVAREA/METAREA. Unscheduled
Additional information:
See “
” on page 36.
See “
” on page 269.
SAT-M
The SAT-M system carries digital voice and low speed data. The forward direction channels from land
earth stations (LES or CES) to mobile earth stations (SES or MES) are 6 kBaud for NCS and LES TDM and
4 kBaud for LES voice and low speed data.
Parameter
Value
Frequency range
L-Band/C-Band
Operation modes
Inm-M (Forward NCS and LES Msg Chnl)
Forward:
6 kbps DPSK, NCS TDM (LES TDM optional)
8 kbps OQPSK, LES Voice , LES Low Speed Data
Return:
3 kbps DPSK, Slotted Aloha, TDMA,
8 kbps OQPSK SCPC
Required SNR
>15 dB (20 dB recommended)
Input format(s)
IF
In idle mode all mobile stations listen to the NCS (Network Control Station) common TDM channel, which
carries signaling information. When a mobile station identifies its id in a signaling frame it will act on the
commands received from the NCS and in case of a channel assignment message being received tune to
the assigned transmit-receive frequency pair. The forward telex traffic channel (from the LES) is also a
TDM with the same frame structure as the NCS TDM.