Comtech EF Data SNM-1001L - Manual (Page 10)

SNM-1001L Satellite Modem Revision 1
Preface MN/SNM1001L.IOM
v
7.1 Introduction................................................................................................................................. 7–1
7.2 Coding .......................................................................................................................................... 7–2
7.3 Turbo Product Codec (Hardware Option) ............................................................................... 7–2
7.3.1 Introduction........................................................................................................................... 7–2
7.3.2 Mod/Demod Processing Delay ............................................................................................. 7–3
7.3.3 Comparison of all TPC Modes.............................................................................................. 7–4
7.4 Uncoded Operation (No FEC) ................................................................................................... 7–5
CHAPTER 8. SYSTEM CHECKOUT.....................................................................................8–1
8.1 System Checkout......................................................................................................................... 8–1
8.1.1 Interface Checkout ................................................................................................................ 8–2
8.1.2 Modulator Checkout ............................................................................................................. 8–3
8.1.3 Demodulator Checkout ........................................................................................................... 8–5
CHAPTER 9. FAULT ISOLATION ........................................................................................9–1
9.1 Fault Isolation.............................................................................................................................. 9–1
9.1.1 System Faults/Alarms ........................................................................................................... 9–2
9.1.2 Faults/Alarms Display........................................................................................................... 9–2
9.1.3 Faults/Alarms Analysis ......................................................................................................... 9–2
CHAPTER 10. AUTOMATIC UPLINK POWER CONTROL.................................................10–1
10.1 AUPC ......................................................................................................................................... 10–1
10.2 Modes of AUPC Location......................................................................................................... 10–3
10.2.1 AUPC – Between Two Modems......................................................................................... 10–4
10.2.2 Self-Monitoring Local Modem AUPC Control .................................................................. 10–5
10.2.3 MUX Operation .................................................................................................................. 10–6
10.2.4 DEMUX Operation ............................................................................................................. 10–6
10.2.5 Buffer Operation ................................................................................................................. 10–6
10.2.6 Loop Timing Operation ...................................................................................................... 10–7
10.2.7 Baseband Loopback Operation ........................................................................................... 10–7
10.2.8 Front Panel Operation ......................................................................................................... 10–7
CHAPTER 11. ASYMMETRICAL LOOP TIMING .................................................................11–1
11.1 Asymmetrical Loop Timing ..................................................................................................... 11–1
CHAPTER 12. FULLY ACCESIBLE SYSTEM TOPOLOGY (FAST)...................................12–1
12.1 FAST System Theory................................................................................................................ 12–1
12.1.1 Implementation ................................................................................................................... 12–1