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CDM-550T Satellite Modem Revision 3
Introduction MN/CDM550T.IOM
1–4
Firmware update notes:
• Version 1.33 has added a new timed Diversity Switch operating mode.
(Note: Please contact CEFD Customer Service for further infomation on the operation
and use of this mode.)
• Version 1.24 has added new Turbo Code Rate – Rate 1/2 QPSK
• Version 1.20 firmware has added KST-2000 ODU capability
• Version 1.19 firmware has added new Turbo Code Rate – Rate 3/4 OQPSK
• Version 1.15 firmware has added two new Turbo Code Rates - Rate 21/44 and Rate 5/16
- both operating in BPSK only.
(Note: If you do not have Version 1.15 or higher installed in your CDM-550T, contact
the factory for a free upgrade)
• Version 1.10 firmware incorporates the following features:
1. Link performance statistics logging. A second log has been added (independent of the
stored events log), where the user can choose to record link performance statistics at
regular intervals. Parameters which are recorded include minimum and average
values of Eb/No, and maximum and average values of Transmit power level increase,
if AUPC is being used.
2. Receive/Transmit Inhibit (RTI) which permits the user to stop a remote site from
bringing up its transmit carrier until its demodulator is correctly locked.
- Satellite Modem 1
- CDM-550T 3
- Table of Contents 5
- Figures 13
- Preface 15
- Preface MN/CDM550T.IOM 16
- Electrical Safety 17
- Environmental 17
- Installation 17
- Warranty Policy 19
- Limitations of Warranty 19
- Exclusive Remedies 20
- Chapter 1. INTRODUCTION 21
- 1.2.1 AUPC 22
- 1.2.2 Software 22
- 1.2.3 Verification 22
- 1.2.4 Data Interfaces 22
- 1.3 Options 23
- 1.4 Compatibility 23
- 1.5 Manual Release Notes 23
- Introduction MN/CDM550T.IOM 24
- Chapter 2. INSTALLATION 25
- 2.3 Configuration 26
- 2.4 Select Internal IF Loop 26
- 2.5 Connect External Cables 26
- Chapter 3. FUNCTIONAL 27
- DESCRIPTION 27
- Receive Data 28
- Chapter 4. PHYSICAL 29
- 5.1 Connector Overview 33
- Vacuum Fluorescent Display 37
- LED Indicators 37
- 6.2 Menu Trees 39
- 6.2.1 Opening Screen 40
- 6.2.3 SELECT: CONFIG 41
- (CONFIG: TX, FEC) 43
- 6–10 46
- 6–14 50
- (CONFIG: RX) CLK (Clocking) 52
- 6.2.3.4.1 (CONFIG: LOCAL) 56
- 6.2.3.4.2 (CONFIG: REMOTE) 56
- 6–22 58
- SEL TX-AIS ALARM MASK: 60
- ACTIVE MASKED(PRESS ENT) 60
- SELECT IF IMPEDANCE: 60
- 50 OHMS 75 OHMS (ENTER) 60
- 6.2.4 SELECT: TEST 61
- Figure 6-4. Loopback Modes 62
- 6–28 64
- 6.2.6.1 (MONIT:) ALARMS 66
- TX TRAFFIC: NO CLOCK 67
- DETECTED FROM INTERFACE 67
- RX:EbNo=05.7dB dF=+11.7k 67
- BER=3.4E-9 BUF=50 AGC=24 67
- 6–32 68
- (MONIT: STATS) VIEW 69
- (MONIT: STATS) CONFIGURE 70
- 6.2.6.4 (MONITOR) AUPC 71
- 6.2.7.1 (STORE/LD) STORE 71
- 6.2.7.2 (STORE/LD) LOAD 72
- 6–38 74
- Chapter 7. FORWARD ERROR 75
- CORRECTION OPTIONS 75
- 7.3 Sequential 76
- Decoding 82
- Sequential 83
- 1024 kbps 84
- 2048 kbps 85
- Viterbi with 86
- RS 220,200 86
- Outer Code 86
- Differential 89
- Encoding 89
- Chapter 8. OFFSET QPSK 91
- OPERATION 91
- MN/CDM550T.IOM 92
- Chapter 9. RS-232 DATA 93
- INTERFACE - ASYNCHRONOUS 93
- 9.4 Other Considerations 94
- 9.4.1 Baud Rate Accuracy 94
- Chapter 10. CLOCKING MODES 95
- 10–2 96
- 10–4 98
- Figure 10-2 . RX Clock Modes 99
- 10–6 100
- Chapter 11. EDMAC CHANNEL 101
- 11.2 M&C Connection 102
- 11.3 Setup Summary 103
- POWER CONTROL 105
- 12.2.1 Target Eb/No 106
- 12.2.2 Max Range 106
- 12.2.3 Alarm 106
- 12.2.4 Demod Unlock 107
- 12.3 Compensation Rate 107
- 12.4 Monitoring 107
- Chapter 13. FLASH UPGRADING 109
- 14.1 MODULATOR 111
- 14.2 Demodulator 113
- 14.4 Data Interfaces 114
- 14.5 Miscellaneous 115
- 14.6 Async Overhead 115
- 14.7 Approvals 115
- Chapter 15. REMOTE CONTROL 117
- 15.3 RS-232 118
- 15.4 Basic Protocol 118
- 15.5 Packet Structure 118
- 15.5.1 Start Of Packet 119
- 15.5.2 Address 119
- 15.5.3 Instruction Code 119
- 15.5.5 Message Arguments 120
- 15.5.6 End Of Packet 121
- 15.6.4 Remote Queries 136
- 15.6.5 Bulk Commands 139
- A.1 Overview 141
- Cable Drawings 144
- MN/CDM550T.IOM 144
- Appendix B. E 145
- MEASUREMENT 145
- Appendix C. ASYNC OVERHEAD 149
- • • • 150
- IMPORTANT 153
- D.2 Menu Trees 154
- D.2.2 SELECT: ODU 155
- METRIC CONVERSIONS 163
- Units of Length 163
- Temperature Conversions 163
- Units of Weight 163
- 480 • 333 • 2200 PHONE 164
- • 333 • 2161 FAX 164
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