Comtech EF Data CDM-570A Installation And Operation Manual page 22

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Table of Contents
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
xvi
MN-CDM570A / CD-CDM570A
Revision 3