Comtech EF Data CDM-570A - Manual (Page 18)

CDM-570A/570AL Satellite Modem with Optional Packet Processor MN-CDM570A / CD-CDM570A
Table of Contents Revision 2
xvi
E.4 Monitoring ......................................................................................................................... E–3
APPENDIX F. CLOCKING MODES .................................................................................... F–1
F.1 Overview ............................................................................................................................ F–1
F.2 Transmit Clocking ............................................................................................................... F–1
F.2.1 Internal Clock ............................................................................................................................................. F–1
F.2.2 TX Terrestrial.............................................................................................................................................. F–2
F.2.3 RX Loop-Timed, RX=TX ............................................................................................................................. F–2
F.2.4 RX Loop-Timed, RX<>TX (Asymmetric Loop Timing) ............................................................................ F–2
F.3 Receive Clocking ................................................................................................................. F–4
F.3.1 Buffer Disabled (RX Satellite) ................................................................................................................... F–4
F.3.2 Buffer Enabled, TX=RX .............................................................................................................................. F–4
F.3.3 Buffer Enabled, RX<>TX............................................................................................................................ F–4
F.4 X.21 Notes .......................................................................................................................... F–6
F.5 G.703 Clock Extension ......................................................................................................... F–6
F.5.1 Clock Extension Mode 1 ........................................................................................................................... F–7
F.5.2 Clock Extension Mode 2 ........................................................................................................................... F–8
F.5.3 Clock Extension Mode 3 ........................................................................................................................... F–8
APPENDIX G. DOUBLETALK CARRIER-IN-CARRIER OPTION ...................................... G–1
G.1 Overview ........................................................................................................................... G–1
G.2 What is DoubleTalk Carrier-in-Carrier? ............................................................................... G–1
G.3 Application Requirements .................................................................................................. G–2
G.3.1 Operational Recommendations ............................................................................................................. G–4
G.4 System Functionality and Operational Considerations......................................................... G–5
G.4.1 DoubleTalk Carrier-in-Carrier Cancellation Process ............................................................................. G–7
G.4.2 Margin Requirements ............................................................................................................................. G–9
G.4.4 Carrier-in-Carrier and Adaptive Coding and Modulation .................................................................... G–9
G.4.5 Carrier-in-Carrier Link Design.................................................................................................................. G–9
G.4.5.1 Symmetric Data Rate Link ................................................................................................................ G–10
G.4.5.2 Asymmetric Data Rate Link .............................................................................................................. G–12
G.4.5.3 Power Limited Links .......................................................................................................................... G–13
G.4.5.4 Commission and Deploy Carrier-in-Carrier .................................................................................... G–14
G.4.6 Validate Carrier-in-Carrier Performance ............................................................................................. G–15
G.5 Operational References .................................................................................................... G–16
G.5.1 Calculate Carrier-in-Carrier Link Budget .............................................................................................. G–16
G.5.2 Estimate PSD Ratio................................................................................................................................. G–17
G.5.2.1 Estimate PSD Ratio from LST ............................................................................................................ G–18