Comtech EF Data SDM-300A User Manual
Page 10
SDM-300A Satellite Modem
Revision 6
Preface
MN/SDM300A.IOM
vi
5.4.6.8 Utility:
Factory Set-Up..............................................................................................................5–109
5.5
Custom Modem Defaults........................................................................................................................5–110
CHAPTER 6.
MODEM TYPES..........................................................................................................................6–1
6.1
Modem Types..............................................................................................................................................6–1
6.1.1 IDR
Operation ......................................................................................................................................6–2
6.1.2 IBS
Operation.......................................................................................................................................6–3
6.1.3 D&I
Operation ......................................................................................................................................6–4
6.1.4
ASYNC/AUPC Operation .....................................................................................................................6–5
6.1.5
EFD Closed Network Configuration .....................................................................................................6–6
6.1.6
Custom Operation ................................................................................................................................6–7
6.1.7
SDM-100 Emulation Operation ............................................................................................................6–8
6.1.8
SDM-6000 Emulation Operation ..........................................................................................................6–9
6.2
Reed-Solomon Modes ..............................................................................................................................6–10
CHAPTER 7.
CLOCKING OPTIONS ................................................................................................................7–1
7.1
Clocking Options ........................................................................................................................................7–1
7.1.1 EIA-232,
EIA-422,
or V.35 Master/Master............................................................................................7–1
7.1.2 EIA-232,
EIA-422,
or V.35 Master/Slave..............................................................................................7–1
7.1.3 IDR/IBS
G.703 Master/Master..............................................................................................................7–2
7.1.4
IDR/IBS G.703 Master/Slave................................................................................................................7–2
7.1.5
D&I G.703 Master/Master.....................................................................................................................7–7
CHAPTER 8.
BUFFERING................................................................................................................................8–1
8.1
Buffering......................................................................................................................................................8–1
8.2
Buffer Size ...................................................................................................................................................8–4
8.3
Doppler ........................................................................................................................................................8–4
8.4
Plesiochronous...........................................................................................................................................8–5
8.5
Frame/Multiframe Length ...........................................................................................................................8–6
8.5.1
Multiples of the Frame Length..............................................................................................................8–6
8.5.2
Total Buffer Length...............................................................................................................................8–6
8.6
Converting Between Bits and Seconds ....................................................................................................8–6
8.6.1
Bits to Seconds
..................................................................................................................................8–6
8.6.2
Seconds to Bits ....................................................................................................................................8–6