Comtech EF Data CDM-600L Installation And Operation Manual page 13

CDM-600L Satellite Modem
Preface
9.1 INTRODUCTION............................................................................................................9-1
9.2 IBS .................................................................................................................................9-1
9.2.1 IBS Clock/data recovery and De-jitter.....................................................................9-2
9.2.2 IBS Framing ............................................................................................................9-2
9.2.3 IBS Engineering Service Channel...........................................................................9-2
9.2.4 IBS Scrambling .......................................................................................................9-2
9.3 DROP AND INSERT ......................................................................................................9-2
9.3.1 D&I Primary Data Interfaces ...................................................................................9-3
9.3.2 D&I Framing............................................................................................................9-3
9.4 IDR .................................................................................................................................9-4
9.4.1 IDR Primary Data Interfaces ...................................................................................9-5
9.4.2 IDR Engineering Service Channel ..........................................................................9-5
CHAPTER 10. CLOCK MODES AND DROP AND INSERT (D&I) .....................................10-1
10.1 TRANSMIT CLOCKING ...........................................................................................10-1
10.1.1 Internal Clock ........................................................................................................10-1
10.1.2 TX Terrestrial Clock ..............................................................................................10-2
10.1.3 RX Loop-Timed, RX=TX .......................................................................................10-2
10.1.4 RX Loop-Timed, RX<>TX (Asymmetric Loop Timing) ..........................................10-2
10.1.5 External Clock.......................................................................................................10-2
10.1.6 External Reference ...............................................................................................10-3
10.2 RECEIVE CLOCKING ..............................................................................................10-3
10.2.1 Buffer Disabled (RX Satellite) ...............................................................................10-3
10.2.2 Buffer Enabled, TX=RX (TX Terrestrial or External Clock) ...................................10-3
10.2.3 Buffer Enabled, RX<>TX (TX Terrestrial or External Clock) .................................10-3
10.3 X.21 NOTES.............................................................................................................10-3
10.4 DROP AND INSERT ................................................................................................10-6
10.5 FRAME FORMATS ..................................................................................................10-6
10.6 TIME SLOT SELECTION .........................................................................................10-7
10.7 DROP AND INSERT CLOCKING.............................................................................10-8
10.8 RX BUFFER CLOCK = INSERT (D&I ONLY) ..........................................................10-9
10.9 SINGLE-SOURCE MULTIPLE MODEMS ................................................................10-9
CHAPTER 11. EDMAC CHANNEL ......................................................................................11-1
11.1 THEORY OF OPERATION ......................................................................................11-1
11.2 M&C CONNECTION ................................................................................................11-2
11.3 SETUP SUMMARY ..................................................................................................11-3
11.4 DROP & INSERT ++ ................................................................................................11-4
CHAPTER 12. AUTOMATIC UPLINK POWER CONTROL................................................12-1
12.1 INTRODUCTION ......................................................................................................12-1
12.2 SETTING AUPC PARAMETERS .............................................................................12-2
12.2.1 AUPC Target Eb/No..............................................................................................12-2
12.2.2 Max Range, AUPC................................................................................................12-2
12.2.3 Alarm, AUPC.........................................................................................................12-3
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MN/CDM600.IOM