Comtech EF Data SDM-300A - Manual (Page 34)

SDM-300A Satellite Modem Revision 6
Introduction MN/SDM300A.IOM
1–8
1.3 Description of FAST Options
The modem has a variety of hardware options available as shown in Table 1-3. Hardware
options are available through conventional means as well as through Comtech EF Data’s FAST
system. Offset QPSK mode is available through the FAST feature. For detailed descriptions of
the FAST feature and all options, refer to Chapter 18.
Note: Comtech EF Data has included a DEMO Mode in the Utility Menu. This feature will
allow the operator to experience any of the FAST options. This feature has a 60-minute time
limit, after which, the unit will return to its previous configuration.
Table 1-2. FAST Options and Required Configurations
Hardware
Si
ngl
e
Data Rate
Lo
w
Va
ria
ble
Da
ta
Ra
te
(up to 512 kbps)
High Var
iable Data Rate
(up to 4.
375 Mbps)
Sequent
ia
l Decoder
Vi
te
rb
i D
ec
od
er
Asymmet
rical
Loop
Ti
mi
ng
8-PSK
Reed–Sol
omon Codec
ASYNC/AUPC Over
head
Open Networ
k (I
DR/
IB
S)
Dr
op & Inser
t
4-Channel ASYNC,
SYNC or
ASYNC/SYNC
8-Channel ASYNC,
SYNC or
ASYNC/SYNC Tur
bo
Basic Platform
SDM-300A
z
1
z
1
FAST Options z z z z z z
FAST Options with
Reed Solomon Hardware
z
FAST Options with
Overhead Hardware
z
2
z
2
z
2
FAST Options with
Reed Solomon And
Overhead Hardware
z z z z
8 Channel Mux z z
Flex Mux z
Notes:
1 The basic modem is shipped with either Sequential or Viterbi decoder.
2 Requires G.703 Interface module and Overhead card.
3 Either IBS OptionOption or IDR Option includes 2xADPCM voice in 64 kbps IBS.
4 Either Simplex Reed-Solomon or Turbo Codec is installed, not both.
5 Duplex Reed-Solomon and Turbo can be installed together, however, only select one at a time.