Mocomtech CDM-QX User 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