Mocomtech CDM-QX - Manual (Page 12)

CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® Revision 7
Table of Contents MN/CDMQX.IOM
x
9.1 What is DoubleTalk Carrier-in-Carrier? ................................................................... 9–1
9.2 Application Requirements............................................................................................ 9–1
9.3 System Functionality .................................................................................................... 9–2
9.4 CnC Performance Characterization ........................................................................... 9–4
9.4.1 Degradation Due To Carrier Spacing ......................................................................... 9–4
9.4.2 Selecting The Adjacent Carrier Curve ........................................................................ 9–7
9.4.3 Carrier-in-Carrier
®
Ratio (CnC Ratio) ........................................................................ 9–8
9.4.4 Symbol Rate Ratio ...................................................................................................... 9–9
9.4.5 CnC Carrier Offset .................................................................................................... 9–10
9.4.6 1
st
CnC Example: Adjacent Carriers, CnC Ratio and Rain Fade .............................. 9–10
9.4.7 2
nd
CnC Example: CnC Ratio With Asymmetric Links ........................................... 9–12
9.4.8 3
rd
CnC Example: Asymmetric Link With Rain Fade .............................................. 9–13
CHAPTER 10. EDMAC CHANNEL ........................................................................ 10–1
10.1 Theory Of Operation .................................................................................................. 10–1
10.2 M&C Connection ........................................................................................................ 10–2
10.3 Setup Summary ........................................................................................................... 10–3
CHAPTER 11. REDUNDANCY .............................................................................. 11–1
APPENDIX A. CABLE DRAWINGS ......................................................................... A-1
A.1 Introduction ................................................................................................................... A-1
A.1.1 EIA-530 to RS-422/449 Data Cable ....................................................................... A-2
A.1.2 EIA-530 to V.35 Data Cable ................................................................................... A-3
A.1.3 EIA-530 Conversion Cable ..................................................................................... A-4
A.1.4 Switch Programming Cable .................................................................................... A-5
APPENDIX B. FAST ACTIVATION PROCEDURE ................................................. B–1
B.1 Introduction ................................................................................................................... B–1
B.2 Activation Procedure .................................................................................................... B–1
B.2.1 Obtain Serial Numbers ............................................................................................ B–1
B.2.2 View Currently Installed FAST Features ............................................................... B–3
B.2.2.1 View Base Unit FAST Features .......................................................................... B–3
B.2.2.2 View Installed Module (Mod/Demod, Turbo) FAST Features .......................... B–4
B.2.3 Acquire FAST Code ............................................................................................... B–5