Comtech EF Data CDM-625A

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CDM-625A Advanced Satellite Modem MN-CDM625A / CD-MN-CDM625A

Table of Contents Revision 4

xvii

B.9 VersaFEC-2 ACM and CCM ................................................................................................. B–16

B.9.1 VersaFEC-2 ACM Latency ...................................................................................................................... B–19

B.10 Uncoded Operation (No FEC) ............................................................................................. B–20

APPENDIX C. AUPC (AUTOMATIC UPLINK POWER CONTROL) ................................... C–1

C.1 AUPC Overview ................................................................................................................... C–1

C.2 Setting AUPC Parameters .................................................................................................... C–2

C.2.1 Target Eb/No ............................................................................................................................................. C–2

C.2.2 Max Range ................................................................................................................................................. C–2

C.2.3 Alarm .......................................................................................................................................................... C–3

C.2.4 Demod Unlock ........................................................................................................................................... C–3

C.3 Compensation Rate ............................................................................................................. C–3

C.4 Monitoring ......................................................................................................................... C–4

APPENDIX D. CARRIER ID (DVB-CID METACARRIER

) ........................................ D–1

D.1 Overview ........................................................................................................................... D–1

D.2 About MetaCarrier ............................................................................................................. D–1

D.3 Functional Description ....................................................................................................... D–2

D.4 Configuring the CDM-625A for Carrier ID Operation ............................................................ D–3

D.4.1 Enabling Carrier ID Operation ................................................................................................................. D–3

D.4.1.1 Enabling Operation via the CDM-625A Front Panel and VFD ........................................................ D–3

APPENDIX E. CLOCK MODES AND DROP AND INSERT (D&I) ...................................... E–1

E.1 Overview ............................................................................................................................ E–1

E.2 Transmit Clocking ............................................................................................................... E–1

E.2.1 Internal Clock ............................................................................................................................................. E–1

E.2.2 TX Terrestrial.............................................................................................................................................. E–2

E.2.3 RX Loop-Timed, RX=TX ............................................................................................................................. E–2

E.2.4 RX Loop-Timed, RX<>TX (Asymmetric Loop Timing) ............................................................................ E–2

E.2.5 External TT with ST = RX Satellite ............................................................................................................

E–2

E.3 Receive Clocking ................................................................................................................. E–4

E.3.1 Buffer Disabled (RX Satellite) ................................................................................................................... E–4

E.3.2 Buffer Enabled, TX=RX (TX Terrestrial or Int (SCT) Clock) ..................................................................... E–4

E.3.3 Buffer Enabled, RX<>TX (TX Terrestrial or Int (SCT) Clock) ................................................................... E–4

E.4 X.21 Notes .......................................................................................................................... E–6