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Quasonix, Inc.
Copyright Quasonix, Inc., All Rights Reserved.
Installation and Operation Manual
Rack-Mount RDMS
TM
Telemetry Receiver
Quasonix, Inc.
6025 Schumacher Park Dr.
West Chester, OH 45069
19 July 2018
Revision 3.5
Specifications subject to change without notice.
All Quasonix products are under U.S. Department of Commerce jurisdiction; not covered by ITAR
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Table of Contents
1 Introduction ............................................................................................................................................ 1
1.1 Description ................................................................................................................................... 1
1.2 Nomenclature .............................................................................................................................. 1
1.2.1 Band ........................................................................................................................................ 2
1.2.2 Options .................................................................................................................................... 3
1.2.3 Detailed Option Descriptions ................................................................................................... 4
1.2.3.1 SAW Filter Option – 14 ....................................................................................................... 4
1.2.3.2 Continuous Tuning – CT ..................................................................................................... 4
1.2.3.3 Diversity Combiner – DC .................................................................................................... 4
1.2.3.4 Viterbi Decoder (for Legacy PSK Only) – K7 ...................................................................... 4
1.2.3.5 Forward Error Correction/Low Density Parity Check (LDPC) (SOQPSK Only) – LD ......... 4
1.2.3.6 No Display – ND .................................................................................................................. 4
1.2.3.7 RS-422 – RS ....................................................................................................................... 4
1.2.3.8 Clone Channel 2 – X2 ......................................................................................................... 4
1.2.3.9 Extended C Band – XC ....................................................................................................... 5
1.2.3.10 Extended Frequency All Bands – XF .............................................................................. 5
1.2.3.11 Extended Lower L Band – XL ......................................................................................... 5
1.2.3.12 Extended P Band – XP ................................................................................................... 5
1.2.3.13 Extended S Band – XS ................................................................................................... 5
1.2.3.14 Extended Upper L Band – XU ........................................................................................ 5
1.3 Package Contents ....................................................................................................................... 5
2 Specifications ......................................................................................................................................... 6
3 Installation Instructions .......................................................................................................................... 9
3.1 Mechanical ................................................................................................................................... 9
3.2 Thermal ...................................................................................................................................... 11
3.3 Electrical .................................................................................................................................... 11
3.3.1 Rear Panel Connections ....................................................................................................... 11
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3.3.1.1 Channel 1 HD15 D-Sub Pinout ......................................................................................... 12
3.3.1.2 Channel 2 HD15 Pinout .................................................................................................... 13
3.3.2 Electrical Signals ................................................................................................................... 13
3.4 Remote Control Interface ........................................................................................................... 14
3.4.1 Network Requirements .......................................................................................................... 15
4 Operating Instructions .......................................................................................................................... 16
4.1 Front-Panel Control ................................................................................................................... 16
4.1.1 Waveform Graphics ............................................................................................................... 17
4.1.1.1 Signal Quality .................................................................................................................... 18
4.1.2 Navigation .............................................................................................................................. 18
4.1.3 Selecting a Receiver Channel ............................................................................................... 19
4.1.4 Main Menu Settings ............................................................................................................... 20
4.1.4.1 Setting Frequency ............................................................................................................. 21
4.1.4.2 Setting Mode ..................................................................................................................... 23
4.1.4.3 Setting Bit Rate ................................................................................................................. 24
4.1.4.4 Diversity Combiner (Optional) ........................................................................................... 25
4.1.4.5 Frequency Diversity (Available with Diversity Combiner) ................................................. 26
4.1.4.6 Setting Data Polarity ......................................................................................................... 27
4.1.4.7 Setting Clock Polarity ........................................................................................................ 27
4.1.4.8 Derandomizer State .......................................................................................................... 27
4.1.4.9 Force Break Lock (PSK Modes Only) ............................................................................... 28
4.1.4.10 Modulation Scaling (PCM/FM Mode Only) ................................................................... 28
4.1.4.10.1 Modulation Scaling - Tracking ............................................................................... 28
4.1.4.10.2 Modulation Scaling - Locked ................................................................................. 29
4.1.4.10.3 Modulation Scaling - Off ........................................................................................ 30
4.1.4.10.4 Modulation Scaling - Acquire ................................................................................. 30
4.1.4.11 Modulation Persistence (PCM/FM Mode Only) ............................................................ 31
4.1.4.12 Differential Decoder ...................................................................................................... 32
4.1.4.13 AGC Menu .................................................................................................................... 32
4.1.4.14 AM Menu ...................................................................................................................... 36
4.1.5 Options Menu ........................................................................................................................ 39
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4.1.5.1 Save Rack Presets Menu ................................................................................................. 40
4.1.5.2 Load Rack Presets Menu .................................................................................................. 41
4.1.5.3 Save Rack Presets to USB ............................................................................................... 42
4.1.5.4 Load Rack Presets from USB ........................................................................................... 43
4.1.5.5 Save a USB Preset ........................................................................................................... 45
4.1.5.6 Load a USB Preset ........................................................................................................... 46
4.1.5.7 Status Menu ...................................................................................................................... 48
4.1.5.7.1 Save Events ............................................................................................................. 48
4.1.5.7.2 Application Update................................................................................................... 49
4.1.5.8 Network Menu ................................................................................................................... 50
4.1.5.8.1 DHCP ....................................................................................................................... 51
4.1.5.8.2 IP Address ............................................................................................................... 51
4.1.5.8.3 Subnet Mask ............................................................................................................ 52
4.1.5.8.4 Default Gateway Address ........................................................................................ 52
4.1.5.8.5 Set Group Security ID .............................................................................................. 53
4.1.5.8.6 Set Rack Alias ......................................................................................................... 54
4.1.5.9 LCD Backlight Option ........................................................................................................ 55
4.1.5.10 Advanced Menu ............................................................................................................ 56
4.1.5.10.1 Synchronize Measured Bit Rate ............................................................................ 57
4.1.5.10.2 IF Filter ................................................................................................................... 58
4.1.5.10.3 Video Filter ............................................................................................................. 62
4.1.5.10.4 Video Scale ............................................................................................................ 63
4.1.5.11 Video Invert ................................................................................................................... 64
4.1.5.12 Video DeEmphasis ....................................................................................................... 65
4.1.5.13 Phase Noise Compensation ......................................................................................... 65
4.1.5.14 Tape Output .................................................................................................................. 66
4.1.5.15 Tape Frequency ............................................................................................................ 66
4.1.5.16 Muting ........................................................................................................................... 67
4.1.5.17 Muting Timeout ............................................................................................................. 68
4.1.5.18 Modulation Scaling Menu ............................................................................................. 69
4.1.5.18.1 Mod Scale Index .................................................................................................... 69
4.1.5.18.2 Hold Threshold ...................................................................................................... 70
4.1.5.19 Encoding Menu ............................................................................................................. 71
4.1.5.19.1 Encoding ................................................................................................................ 72
4.1.5.19.2 Spectrum Inversion ................................................................................................ 73
4.1.5.19.3 Bi-Phase ................................................................................................................ 73
4.1.5.20 DC Antenna .................................................................................................................. 73
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4.1.5.21 Convolutional Decode ................................................................................................... 75
4.1.5.22 SNR Estimator .............................................................................................................. 75
4.1.5.23 Factory Default ............................................................................................................. 76
4.2 Remote RDMS™ Client (RRC) Control ..................................................................................... 76
4.2.1 Considerations for Running Multiple GUI Clients on a Single Computer .............................. 77
4.2.2 Selecting an RDMS™ Unit .................................................................................................... 78
4.2.3 Remote Control Menu ........................................................................................................... 80
4.2.3.1 Basic Settings ................................................................................................................... 80
4.2.3.1.1 Basic Settings Tab ................................................................................................... 81
4.2.3.1.2 Advanced Settings Tab ........................................................................................... 90
4.2.4 Remote Monitoring Menu .................................................................................................... 100
4.2.4.1 Multiple RDMS Performance Monitor ............................................................................. 100
4.2.5 Tools Menu .......................................................................................................................... 103
4.2.5.1 Network Settings ............................................................................................................. 104
4.2.5.1.1 Ethernet Settings ................................................................................................... 105
4.2.5.1.2 Status ..................................................................................................................... 105
4.2.5.1.3 Alias Name ............................................................................................................ 105
4.2.5.1.4 Additional Information ............................................................................................ 106
4.2.5.2 Arrange Windows ............................................................................................................ 106
4.2.5.2.1 Restore Default Locations ..................................................................................... 107
4.2.5.3 Firmware Upgrade .......................................................................................................... 107
4.2.6 Mission Management Menu ................................................................................................ 107
4.2.6.1 Mission Control ............................................................................................................... 107
4.2.6.1.1 Control of Mission Control Client Window ............................................................. 109
4.2.6.1.2 Client Master .......................................................................................................... 114
4.2.6.2 Group Security Filter ....................................................................................................... 116
4.2.6.2.1 Ethernet Group ID Filter ........................................................................................ 117
4.2.6.2.2 Notes ..................................................................................................................... 117
4.2.6.2.3 RDMS Racks Configured By Department Groups ................................................ 120
4.2.6.2.4 RDMS™ Racks Configured With Independent Group ID Names ......................... 120
4.2.7 About Menu ......................................................................................................................... 121
4.2.8 File Menu ............................................................................................................................. 122
4.2.8.1 Save/Load Presets .......................................................................................................... 122
4.2.8.2 Save or Load RDMS Flash Presets ................................................................................ 126
4.2.8.2.1 RDMS Save Profile Menu ...................................................................................... 126
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4.2.8.2.2 RDMS Load Profile Menu ...................................................................................... 127
4.2.8.3 Turn Off RDMS™ Unit .................................................................................................... 128
4.2.8.4 Communications Help ..................................................................................................... 129
4.3 Advanced Terminal .................................................................................................................. 129
4.3.1 Advanced Terminal Window ................................................................................................ 130
4.3.2 Tier 0 (PCM/FM), Tier I (SOQPSK-TG), and Tier II (MULTI-H CPM) Commands ............. 132
4.4 Operational Priority .................................................................................................................. 146
4.5 Troubleshooting Remote Client Operation .............................................................................. 146
4.5.1 Remote Client Cannot Find Rack with a One to One Cable ............................................... 146
4.5.2 Graphics in the Remote Client are not Rendering Correctly on a PC using Windows 7 .... 148
5 Performance Specifications ............................................................................................................... 151
5.1 RF Input ................................................................................................................................... 151
5.2 Power ....................................................................................................................................... 151
5.3 RF Frequency Error ................................................................................................................. 151
5.4 Bit Error Rate ........................................................................................................................... 151
5.5 Synchronization ....................................................................................................................... 152
6 Maintenance Instructions ................................................................................................................... 154
7 Product Warranty ............................................................................................................................... 155
8 Technical Support and RMA Requests.............................................................................................. 156
9 Appendix A – Bit Error Rate Testing .................................................................................................. 157
9.1 Test Noise Commands ............................................................................................................ 160
10 Appendix B – AGC Compensation ................................................................................................. 162
10.1 AM Menu.................................................................................................................................. 162
10.1.1 Recommended Settings ...................................................................................................... 162
10.2 SNR Estimator (Advanced Menu) ........................................................................................... 162
11 Appendix C – Phase Noise Compensation .................................................................................... 163
11.1 Trellis Demodulation Basics .................................................................................................... 163
11.1.1 Trellis Demodulation Summary ........................................................................................... 164
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11.2 Phase Noise Impact ................................................................................................................. 165
11.3 Clock Jitter Impact ................................................................................................................... 165
11.4 When to Use PNC ................................................................................................................... 165
11.5 Know Your Transmitter ............................................................................................................ 166
12 Appendix D – Factory Reset Values .............................................................................................. 167
13 Appendix E – Special Considerations for International Applications ............................................. 171
13.1 IP Address Separator .............................................................................................................. 171
14 Appendix F – Acronym List ............................................................................................................ 174
List of Figures
Figure 1: Rack-Mount RDMS™ Part Number Construction ......................................................................... 2
Figure 2: Mechanical Drawing – Front View ................................................................................................. 9
Figure 3: Mechanical Drawing – Top View (Dual-channel Connectors Shown) ........................................... 9
Figure 4: Interior 3-D Drawing of Single-Channel Receiver ........................................................................ 10
Figure 5: Portable 19” Rack Installation with Four RDMS™ Units Shown ................................................. 10
Figure 6: Rear Panel ................................................................................................................................... 11
Figure 7: HD15 D-Sub Pin Locations .......................................................................................................... 13
Figure 8: Baseband Signal Timing .............................................................................................................. 14
Figure 9: Front Panel Diagram for Dual-Channel Configuration ................................................................. 16
Figure 10: Front Panel Keypad ................................................................................................................... 16
Figure 11: Example PCM/FM Eye Pattern .................................................................................................. 17
Figure 12: Example SOQPSK Constellation ............................................................................................... 17
Figure 13: Waveform Graphics LCD with Locked PCM/FM Signal ............................................................ 18
Figure 14: Front Panel Navigation Keys ..................................................................................................... 19
Figure 15: Select Unit Key .......................................................................................................................... 19
Figure 16: Active Main Menu Settings LCD ................................................................................................ 19
Figure 17: Inactive Main Menu Display Grayed Out – Other Channel Active ............................................. 20
Figure 18: Inactive Main Menu Display with Wait Message ....................................................................... 20
Figure 19: Front Panel Keypad ................................................................................................................... 21
Figure 20: Frequency Key on Front Panel .................................................................................................. 21
Figure 21: Main Menu, Frequency Setting .................................................................................................. 22
Figure 22: Frequency Entry Screen ............................................................................................................ 22
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Figure 23: Example Keypad Combination for Setting Frequency ............................................................... 22
Figure 24: Main Menu, Mode Setting .......................................................................................................... 23
Figure 25: Rate Key on Front Panel ........................................................................................................... 24
Figure 26: Main Menu, Bit Rate Setting ...................................................................................................... 25
Figure 27: Bit Rate Entry Screen ................................................................................................................ 25
Figure 28: Example Keypad Combination for Setting Bit Rate ................................................................... 25
Figure 29: Main Menu, Combiner Setting ................................................................................................... 26
Figure 30: Main Menu, Frequency Diversity Setting ................................................................................... 26
Figure 31: Main Menu, Data Setting ........................................................................................................... 27
Figure 32: Main Menu, Clock Setting .......................................................................................................... 27
Figure 33: Main Menu, Derandomizer Setting ............................................................................................ 28
Figure 34: Main Menu, Force Break Lock ................................................................................................... 28
Figure 35: Main Menu, Modulation Scaling – Tracking ............................................................................... 29
Figure 36: Red Eye Pattern Display - Tracking........................................................................................... 29
Figure 37: Main Menu, Modulation Scaling – Locked ................................................................................. 29
Figure 38: Green Eye Pattern Display - Locked ......................................................................................... 29
Figure 39: Main Menu, Modulation Scaling – Off ........................................................................................ 30
Figure 40: Green Eye Pattern Display - Off ................................................................................................ 30
Figure 41: Main Menu, Modulation Scaling – Acquire ................................................................................ 31
Figure 42: Yellow Eye Pattern Display - Acquire ........................................................................................ 31
Figure 43: Main Menu, Modulation Persistence – Off ................................................................................. 31
Figure 44: Main Menu, Modulation Persistence – On ................................................................................. 32
Figure 45: Main Menu, Differential Decoder Setting ................................................................................... 32
Figure 46: Main Menu, AGC Menu Selection ............................................................................................. 33
Figure 47: AGC Menu, AGC and Polarity Highlighted ................................................................................ 33
Figure 48: AGC Menu, AGC Zero Hold Off Highlighted ............................................................................. 34
Figure 49: AGC Menu, Gain and Time Constant Highlighted ..................................................................... 34
Figure 50: AGC Gain and Time Constant Entry Screens ........................................................................... 34
Figure 51: Waveform Graphics Before AGC Zero Set ................................................................................ 35
Figure 52: AGC Menu, AGC Zero Highlighted ............................................................................................ 36
Figure 53: AGC Menu, AGC Zero Set Message ......................................................................................... 36
Figure 54: Waveform Graphics After AGC Zero Set ................................................................................... 36
Figure 55: Main Menu, AM Menu Selection ................................................................................................ 37
Figure 56: AM Menu, Bandwidth and Time Delay Highlighted ................................................................... 37
Figure 57: AM Menu, Scale Highlighted ..................................................................................................... 38
Figure 58: AM Bandwidth and Time Delay Entry Screens .......................................................................... 38
Figure 59: AM Scaling Entry Screen ........................................................................................................... 38
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Figure 60: AM Menu, AM Polarity Highlighted ............................................................................................ 39
Figure 61: AM Menu, AGC COMP Highlighted ........................................................................................... 39
Figure 62: Main Menu, Options Menu Selection ......................................................................................... 40
Figure 63: Options Menu, Save Rack Presets Menu Selection .................................................................. 40
Figure 64: Save Menu, Save Presets – Slot 1 Full, Slot 2 Empty............................................................... 41
Figure 65: Options Menu, Load Menu Selection ........................................................................................ 41
Figure 66: Load Menu, Load Presets – Slot 1 Load Available, Slot 2 Empty ............................................. 42
Figure 67: Options Menu, Save Rack Presets to USB Selection ............................................................... 42
Figure 68: Save Rack Presets to USB Entry Screen .................................................................................. 43
Figure 69: File Exists Error Screen ............................................................................................................. 43
Figure 70: Options Menu, Rack Presets Saved Message .......................................................................... 43
Figure 71: Options Menu, USB Error Message .......................................................................................... 43
Figure 72: Options Menu, Load Rack Presets from USB Selection ........................................................... 44
Figure 73: Load Rack Presets to USB Entry Screen .................................................................................. 44
Figure 74: Options Menu, Rack Presets Loaded Message ........................................................................ 45
Figure 75: Options Menu, USB Error Message .......................................................................................... 45
Figure 76: Options Menu, Save a USB Preset Selection ........................................................................... 45
Figure 77: Save a USB Preset Entry Screen .............................................................................................. 46
Figure 78: File Exists Error Screen ............................................................................................................. 46
Figure 79: Options Menu, USB Saved Message ........................................................................................ 46
Figure 80: Options Menu, USB Error Message .......................................................................................... 46
Figure 81: Options Menu, Load a USB Preset Selection ............................................................................ 47
Figure 82: Load a USB Preset Entry Screen .............................................................................................. 47
Figure 83: Options Menu, USB Loaded Message ...................................................................................... 48
Figure 84: Options Menu, USB Error Message .......................................................................................... 48
Figure 85: Options Menu, Status Menu Selection ...................................................................................... 48
Figure 86: Status Menu, Save Events – Mem Stick ................................................................................... 49
Figure 87: Status Menu, App Update – Mem Stick ..................................................................................... 49
Figure 88: Status Menu, App Update – Mem Stick - Not Found................................................................. 50
Figure 89: Options Menu, Network Menu Selection ................................................................................... 50
Figure 90: Network Menu, Apply New Settings Displayed ......................................................................... 51
Figure 91: Network Menu, DHCP Setting ................................................................................................... 51
Figure 92: Network Menu, IP Setting .......................................................................................................... 52
Figure 93: Network Menu, Subnet Setting .................................................................................................. 52
Figure 94: Network Menu, Gateway Setting ............................................................................................... 53
Figure 95: Network Menu, Set Group Security ID Setting .......................................................................... 53
Figure 96: Enter New Group ID .................................................................................................................. 54
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Figure 97: Network Menu, Set Rack Alias Setting ...................................................................................... 54
Figure 98: Enter New Rack Alias ................................................................................................................ 55
Figure 99: Options Menu, LCD Backlight Selection .................................................................................... 55
Figure 100: LCD Backlight Value Entry Screen .......................................................................................... 55
Figure 101: Main Menu, Advanced Menu ................................................................................................... 56
Figure 102: Advanced Menu, Sync Measured Bit Rate Selection .............................................................. 57
Figure 103: Advanced Menu, Measured Bitrate Entry Screen ................................................................... 57
Figure 104: Sync Measured Bit Rate Not Valid Message ........................................................................... 58
Figure 105: 70 MHz IF Module in 2” x 3” Chassis....................................................................................... 58
Figure 106: 70 MHz IF Module in 2” x 3” Chassis SAW Filter Responses, Narrow Group (10 MHz Span)59
Figure 107: SAW Filter Responses, Wide Group (Plotted on 100 MHz Span) ........................................... 60
Figure 108: Optional SAW Filter Responses for 70 kHz to 6 MHz ............................................................. 61
Figure 109: Optional SAW Filter Responses for 14 MHz and 28 MHz ....................................................... 62
Figure 110: Front Panel Advanced Menu and IF Filter Menu ..................................................................... 62
Figure 111: Advanced Menu, Video Filter Selection ................................................................................... 63
Figure 112: Video Filter Setting Entry Screen ............................................................................................. 63
Figure 113: Advanced Menu, Video Scale Selection .................................................................................. 64
Figure 114: Video Scale Entry Screen ........................................................................................................ 64
Figure 115: Advanced Menu, Video Invert Selection .................................................................................. 65
Figure 116: Advanced Menu, Video DeEmphasis Selection ...................................................................... 65
Figure 117: Advanced Menu, Phase Noise Compensation Selection ........................................................ 66
Figure 118: Advanced Menu, Tape Output Selection ................................................................................. 66
Figure 119: Advanced Menu, Tape Frequency Selection ........................................................................... 67
Figure 120: Tape Frequency Value Entry Screen ...................................................................................... 67
Figure 121: Advanced Menu, Muting Selection .......................................................................................... 68
Figure 122: Advanced Menu, Muting Timeout Selection ............................................................................ 68
Figure 123: Muting Timeout Entry Screen .................................................................................................. 69
Figure 124: Advanced Menu, Mod Scaling Menu Selection ....................................................................... 69
Figure 125: Mod Scaling Menu, Mod Scale Index Selection ...................................................................... 70
Figure 126: Modulation Scale Index Entry Screen ..................................................................................... 70
Figure 127: Mod Scaling Menu, Hold Threshold Selection ......................................................................... 71
Figure 128: Modulation Scaling Hold Threshold Entry Screen ................................................................... 71
Figure 129: Advanced Menu, Encoding Menu Selection ............................................................................ 72
Figure 130: Encoding Menu, Encoding Selection ....................................................................................... 72
Figure 131: Encoding Menu, Spectrum Selection ...................................................................................... 73
Figure 132: Encoding Menu, Bi-Phase Selection ....................................................................................... 73
Figure 133: Advanced Menu, DC Antenna Selection ................................................................................. 74
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Figure 134: Advanced Menu, Convolutional Decode Selection.................................................................. 75
Figure 135: Advanced Menu, SNR Estimator Selection, AGC and DSP .................................................... 76
Figure 136: Advanced Menu, Factory Default Selection ............................................................................ 76
Figure 137: Remote RDMS™ Client in Desktop Window ........................................................................... 77
Figure 138: Please Wait Message .............................................................................................................. 77
Figure 139: Searching for RDMS Units Message ....................................................................................... 78
Figure 140: Selected RDMS Unit ................................................................................................................ 78
Figure 141: Selected RDMS Unit and Connect Screen Button .................................................................. 79
Figure 142: Connecting to RDMS™ Unit .................................................................................................... 79
Figure 143: RDMS™ Connected Image ..................................................................................................... 79
Figure 144: Remote Control Menu .............................................................................................................. 80
Figure 145: Basic RDMS Settings Window ................................................................................................. 80
Figure 146: Basic RDMS Settings, Only One Channel Available ............................................................... 81
Figure 147: On-Screen Buttons .................................................................................................................. 82
Figure 148: Basic Settings Window ............................................................................................................ 83
Figure 149: Basic Settings Window, Mode Menu ....................................................................................... 83
Figure 150: Basic Settings Window, Modulation Scaling Menu.................................................................. 84
Figure 151: Modulation Scaling Set to Tracking, Signal Graph Displays Red ............................................ 84
Figure 152: Modulation Scaling Set to Locked, Signal Graph Displays Green .......................................... 85
Figure 153: Modulation Scaling Set to Acquire, Signal Graph Displays Yellow ......................................... 86
Figure 154: Filter Settings Window, PCM/FM Mode ................................................................................... 87
Figure 155: Filter Settings Window, Non-PCM/FM Mode ........................................................................... 87
Figure 156: Signal Graph and Signal Indicators Windows ......................................................................... 88
Figure 157: Signal Indicators, Signal Not Locked ....................................................................................... 88
Figure 158: Diversity Combiner Link with Lock ........................................................................................... 89
Figure 159: Diversity Combiner Link without Lock ...................................................................................... 89
Figure 160: Diversity Combiner Error ......................................................................................................... 89
Figure 161: Copy Channel Settings ............................................................................................................ 90
Figure 162: Advanced Settings Tab (PCM/FM Version) ............................................................................. 91
Figure 163: Advanced Settings Tab (Non-PCM/FM Version) ..................................................................... 92
Figure 164: On-Screen Buttons .................................................................................................................. 93
Figure 165: Modulation Scale Settings Window ......................................................................................... 93
Figure 166: AGC Settings Window ............................................................................................................. 94
Figure 167: AM Settings Window ................................................................................................................ 95
Figure 168: Tape Output Settings Window ................................................................................................. 95
Figure 169: Muting Settings Window .......................................................................................................... 95
Figure 170: Synchronize Bit Rate Settings Window ................................................................................... 96
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Figure 171: Video Settings Window ............................................................................................................ 97
Figure 172: Additional Advanced Settings, Encoding Menu Highlighted, PCM/FM Mode Only ................. 98
Figure 173: Additional Advanced Settings, Check Boxes ........................................................................... 99
Figure 174: Additional Advanced Settings, SNR Estimator ........................................................................ 99
Figure 175: Multiple RDMS Performance Monitor .................................................................................... 100
Figure 176: Multiple RDMS Performance Monitor, Two Active Channels, Signal Not Locked ................. 101
Figure 177: Multiple RDMS Performance Monitor, Two Channels, One Signal Locked .......................... 101
Figure 178: Multiple RDMS Performance Monitor, Two Active Channels, Both Signals Locked ............. 102
Figure 179: Multiple RDMS Performance Monitor, Inactive Channels Hidden ......................................... 102
Figure 180: Multiple RDMS Performance Monitor, Two RDMS™ Receivers in Rack .............................. 103
Figure 181: Multiple RDMS Performance Monitor, Four RDMS™ Receivers in Rack ............................. 103
Figure 182: Tools Menu ............................................................................................................................ 103
Figure 183: Tools Menu, Network Settings Option ................................................................................... 104
Figure 184: Network Settings Screen ....................................................................................................... 104
Figure 185: Network Settings, Ethernet Settings Window ........................................................................ 105
Figure 186: Network Settings, Status Window.......................................................................................... 105
Figure 187: Network Settings, Alias Name Window ................................................................................. 106
Figure 188: Network Settings, Additional Information Window ................................................................. 106
Figure 189: Tools Menu, Arrange Windows Option .................................................................................. 107
Figure 190: Tools Menu, Firmware Upgrade Option ................................................................................ 107
Figure 191: Mission Management Tab, Mission Control Option ............................................................... 107
Figure 192: Mission Control Screen .......................................................................................................... 108
Figure 193: Mission Control, Active Clients Window ................................................................................ 108
Figure 194: Mission Control, Messages Window ...................................................................................... 109
Figure 195: Messages Window, Message Displayed ............................................................................... 109
Figure 196: Selected RDMS Unit and Connect Screen Button ................................................................ 109
Figure 197: Rack Assigned to Another Client Message ........................................................................... 110
Figure 198: Request Sent Message ......................................................................................................... 110
Figure 199: Tool Bar Flashes – Another Client Wants Control of Rack ................................................... 111
Figure 200: Close Up of (Flashing) Mission Management Tool Bar ......................................................... 111
Figure 201: Example – Client 2’s Mission Control Window ...................................................................... 112
Figure 202: Example – Client 2’s Active Clients Window ......................................................................... 112
Figure 203: Example – Client 2’s Messages Window Prior to Denying Control ....................................... 112
Figure 204: Example – All Clients’ Messages Window with Automatic Denial Message ......................... 113
Figure 205: Example – Client 2’s Messages Window Prior to Releasing Control .................................... 113
Figure 206: Example – Close Selected Rack Controls Message ............................................................. 113
Figure 207: Example – Mission Control Window for Both Clients ............................................................ 114
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Figure 208: Example – Mission Control Window for Both Clients ............................................................ 114
Figure 209: Enable Master Example – Active Clients with Enable Master Screen Button ....................... 115
Figure 210: Mission Control with Options Master Pass Code Box ........................................................... 115
Figure 211: Mission Control Client HCD-L2 Master Enabled ................................................................... 115
Figure 212: Access Granted Message ...................................................................................................... 116
Figure 213: Message to HCD-L2 from ERIC-PC (ERIC-LAPTOP)........................................................... 116
Figure 214: Mission Management Menu, Group Security Filter Option .................................................... 117
Figure 215: Mission Management Tab, Group Security Filter – Ethernet Group ID Filter Screen ........... 117
Figure 216: Save Group ID Table File, Windows Explorer Selection Screen ........................................... 118
Figure 217: Load Group ID Table File, Windows Explorer Selection Screen ........................................... 119
Figure 218: Selected RDMS Unit .............................................................................................................. 120
Figure 219: Group Security Filter, Ethernet Group ID Filter Screen – Filtered by Department ................ 120
Figure 220: Group Security Filter, Ethernet Group ID Filter Screen – Filtered by RDMS Name .............. 121
Figure 221: Remote RDMS™ Client Main Menu Bar, About Menu .......................................................... 121
Figure 222: About Screen ......................................................................................................................... 122
Figure 223: File Menu ............................................................................................................................... 122
Figure 224: Save/Load Preset Files .......................................................................................................... 123
Figure 225: Save/Load Preset Files, Save Preset Window ...................................................................... 123
Figure 226: Save/Load Preset Files, Folder Name Window ..................................................................... 124
Figure 227: Save/Load Preset Files, Folder Name Typed ........................................................................ 124
Figure 228: Save/Load Preset Files, Delete Window ............................................................................... 125
Figure 229: Save/Load Preset Files, Rename Window ............................................................................ 126
Figure 230: File Tab, Save/Load Preset Files........................................................................................... 126
Figure 231: RDMS Save Profile Window .................................................................................................. 127
Figure 232: RDMS Load Profile Window .................................................................................................. 127
Figure 233: File Menu, Turn Off RDMS Unit ............................................................................................. 128
Figure 234: RDMS Shutdown Warning Window ....................................................................................... 128
Figure 235: File Menu, Communications Help .......................................................................................... 129
Figure 236: Remote Control Menu, Advanced Terminal Option ............................................................... 129
Figure 237: Start Advanced Terminal Communications ........................................................................... 130
Figure 238: Advanced Terminal Window .................................................................................................. 130
Figure 239: Advanced Terminal Window with User Message .................................................................. 131
Figure 240: Start Menu - Control Panel .................................................................................................... 147
Figure 241: Control Panel - Network and Sharing Center ........................................................................ 147
Figure 242: Start Menu - Control Panel .................................................................................................... 148
Figure 243: Control Panel, Display Selection ........................................................................................... 149
Figure 244: Display Window, Set Custom Text Size Option ..................................................................... 149
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Figure 245: Custom DPI Setting Window ................................................................................................. 150
Figure 246: BER Performance for Tier 0, I, and II .................................................................................... 152
Figure 247: Synchronization Time at Various Signal-to-Noise Ratios ...................................................... 153
Figure 248: Ideal PCM/FM Phase Tree (h = 0.7) ...................................................................................... 163
Figure 249: Phase Trajectory Never Forgets ............................................................................................ 164
Figure 250: Trellis Detection Gain with Zero to Minimum Phase Noise ................................................... 164
Figure 251: Trellis Detection Gain with Significant to Severe Phase Noise ............................................. 165
Figure 252: "Clean" Eye Pattern ............................................................................................................... 166
Figure 253: Start Menu - Control Panel .................................................................................................... 171
Figure 254: Region and Language Selection............................................................................................ 172
Figure 255: Customize Format Window .................................................................................................... 173
List of Tables
Table 1: Standard Band Field Codes ............................................................................................................ 2
Table 2: Model Configuration Example ......................................................................................................... 3
Table 3: Extended Band Frequency Ranges ................................................................................................ 5
Table 4: Rear Panel Connector Specifications ........................................................................................... 11
Table 5: Channel 1 HD15 D-Sub Pinout (J7) .............................................................................................. 12
Table 6: Channel 2 HD15 D-Sub Pinout (J17) ............................................................................................ 13
Table 7: Band and Frequency Combinations.............................................................................................. 23
Table 8: Modulation Naming Convention .................................................................................................... 24
Table 9: Standard and Optional User Commands .................................................................................... 132
Table 10: Interface Prioritization ............................................................................................................... 146
Table 11: Band Codes and Frequencies .................................................................................................. 151
Table 12: RDMS™ BER Specifications .................................................................................................... 152
Table 13: Bit Error Rate Serial Commands ............................................................................................... 157
Table 14: Test Noise Commands ............................................................................................................. 161
Table 15: Recommended AM/AGC Settings ............................................................................................ 162
Table 16: QPSK Factory Reset Values ..................................................................................................... 167
Table 17: PCM/FM Factory Reset Values ................................................................................................ 168
Table 18: SOQPSK Factory Reset Values ............................................................................................... 169
Table 19: Multi-h CPM Factory Reset Values ........................................................................................... 170
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Rack-Mount RDMSTM Telemetry Receiver
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1 Introduction
1.1 Description
This document describes the installation and operation of the Quasonix Rack-Mount RDMSTM Telemetry Receiver.
The RDMS™ (Receiver / DeModulator / bit Synchronizer) is designed to downconvert, demodulate, and bit synch
to a variety of RF telemetry signals from flight-test aircraft. With an intuitive front-panel interface as well as an
extensible Ethernet-based client interface, and antenna-tracking outputs, the Rack-Mount RDMSTM is capable of
fulfilling a variety of flight test station requirements.
The following waveform formats are supported by RDMS™:
• PCM/FM (ARTM Tier 0)
• SOQPSK-TG (ARTM Tier I)
• ARTM CPM / Multi-h CPM (ARTM Tier II)
• Legacy (PSK) suite, which includes:
• BPSK
• QPSK
• Offset QPSK (OQPSK)
• Asymmetric QPSK (AQPSK)
• Unbalanced QPSK (UQPSK)
• Asymmetric Unbalanced QPSK (AUQPSK)
• Digital PM
Of the aforementioned, RDMS™ provides true multi-symbol trellis demodulation in all three ARTM modes,
PCM/FM, SOQPSK-TG, and Multi-h PCM. It also provides a clock signal, obviating the need for any outboard bit
synchronizer.
The Rack-Mount RDMS™ Telemetry Receiver is manufactured by:
Quasonix, Inc.
6025 Schumacher Park Drive
West Chester, OH 45069
CAGE code: 3CJA9
1.2 Nomenclature
The Rack-Mount RDMS™ (hereafter referred to as “RM RDMS™”) is available in a plethora of variations based on
the number of channels, frequency bands, demodulation methods, options, etc. The features and modes installed in
each unit are identified in the model number, as depicted in Figure 1.
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Figure 1: Rack-Mount RDMS™ Part Number Construction
1.2.1 Band
Band field codes are listed in Table 1.
Table 1: Standard Band Field Codes
Model Number
Code
Band
Minimum
Frequency
Maximum
Frequency
Default
Frequency
P
P band (UHF)
400.0 MHz
1150.0 MHz
400.0 MHz
L
Lower L
1435.5 MHz
1534.5 MHz
1435.5 MHz
U
Upper L
1755.0 MHz
1850.0 MHz
1755.0 MHz
S
S
2200.5 MHz
2394.5 MHz
2200.5 MHz
C
C “Low”
4400.0 MHz
5150.0 MHz
4400.0 MHz
G
P and S (Dual band)
400.0 MHz and
2200.5 MHz
1150.0 MHz and
2394.5 MHz
2200.5 MHz
F
S and C (Dual band)
2200.5 MHz and
4400.0 MHz
2394.5 MHz and
5150.0 MHz
2200.5 MHz
M
Lower L, Upper L, and
S (Tri-band)
1435.5 MHz
2394.5 MHz
1435.5 MHz
R
P, Full-L, and S
(Quad band)
400.0 MHz
2394.5 MHz
1435.5 MHz
Q
Full L, S, and C
(Quad band)
1435.5 MHz
5150.0 MHz
1435.5 MHz
- - X2
Copy Channel 1 modes
(both channels
configured the same)
(X2 or blank)
Rack Mo unt RDMS™ Part Numbering Example
S
Frequency
Band Code
(Refer to
band tables)
QSX-RDMS-RM 2
Standard
Prefix
Channels
1 or 2
- - XF
Options, separated by
hyphens
(example extended
frequency)
M
Frequency
Band Code
(if different
Channel 2)
(Refer to
band tables)
-1 1 1 0
PCM/FM
SOQPSK
-TG
Legacy
Mode:
1 = Enabled
0 = Not enabled
ARTM CPM
1 1 1 0
PCM/FM
SOQPSK
-TG
Legacy
Mode:
1 = Enabled
0 = Not enabled
(if different
Channel 2)
ARTM CPM
-
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Model Number
Code
Band
Minimum
Frequency
Maximum
Frequency
Default
Frequency
E
P, Full L, S, and C
(Five band)
400.0 MHz
5150.0 MHz
400.0 MHz
1.2.2 Options
The available options are listed below. Refer to section 1.2.3 for detailed descriptions of each option. Please contact
Quasonix for assistance ordering receiver options.
• 14 14 SAW filters (adds 70 kHz, 1.4, 3, 6, 14, and 28 MHz filters)
• CT Continuous tuning
• DC Digitally implemented pre-detection diversity combiner (requires dual-channel configuration)
• K7 K7 Viterbi Decoder (k=7, rate 1/2)
• LD LDPC decoder
• ND Blank front panel with no displays or keypad
• RS RS-422 clock and data outputs on 3-lug triax connectors
• X2 Configure-Channel 2 the same as Channel 1 (bands and modes)
• XC Extended C band
• XF Extend frequency range for all enabled bands
• XL Extended Lower L band
• XP Extended P band
• XS Extended S band
• XU Extended Upper L band
For example, a model QSX-RDMS-RM2-L-1101-S-1101-DC is configured as shown in Table 2:
Table 2: Model Configuration Example
Identifiers
Description
QSX
Quasonix product
RDMS
Receiver / Demodulator / Bit Synchronizer
RM2
Rack-Mount package, 2 channels
L
Ch 1: Lower L-band operation
1101
Ch 1: Tier 0 present, Tier I present, Tier II absent,
Legacy (PSK) present
S
Ch 2: S-band operation
1101
Ch 2: Tier 0 present, Tier I present, Tier II absent,
Legacy (PSK) present
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Identifiers
Description
DC
Diversity combiner option
In the case of multi-channel receiver configurations with identical frequency bands and modes, a shorthand part
number can be used by including a multiplier code immediately following the initial frequency band and mode
character string. The multiplier code is “X2” for applicability to a two channel receiver configuration.
As an example, the following traditional part number, QSX-RDMS-RM2-M-1110-M-1110-DC, can be shortened to
QSX-RDMS-RM2-M-1110-X2-DC.
1.2.3 Detailed Option Descriptions
1.2.3.1 SAW Filter Option – 14
This option adds additional SAW filters, for a total of 14. The additional filters are 70 kHz, plus 1.4, 3, 6, 14, and 28
MHz.
1.2.3.2 Continuous Tuning – CT
The CT option allows continuous tuning, including between specified bands. This option only applies to five-band
receivers.
1.2.3.3 Diversity Combiner – DC
The DC option provides a digitally implemented pre-detection diversity combiner. This option requires the dualchannel configuration.
1.2.3.4 Viterbi Decoder (for Legacy PSK Only) – K7
The K7 option (k=7, rate 1/2) enables Viterbi decoding of a convolutionally encoded data stream, which converts it
back to the original (uncoded) source data stream.
Convolutional encoding adds redundant information to the transmitted data stream to help detect and correct bit
errors that may occur, particularly due to predominantly Gaussian noise. Use of convolutional encoding requires a
matching Viterbi decoder in the receiver to extract the source data. The decoded data rate is half the encoded data
rate. The receiver has two independent decoders, one for in-phase (“I”) data and one for quadrature (“Q”) data. For
BPSK, only a single decoder is used. Each decoder is compatible with the convolutional encoding described in the
“Consultative Committee for Space Data Systems, Recommendation for Space Data System Standards, TM
Synchronization and Channel Coding, CCSDS 131.0-B-1, Blue Book, September 2003, Section 3.”
1.2.3.5 Forward Error Correction/Low Density Parity Check (LDPC) (SOQPSK Only) – LD
The LD option provides the Low Density Parity Check (LDPC) forward error correction (FEC) decoder. This option
is only available with SOQPSK.
1.2.3.6 No Display – ND
The ND option provides a blank front panel with no displays or keypad.
1.2.3.7 RS-422 – RS
The RS option specifies RS-422 clock and data outputs on 3-lug triax connectors.
1.2.3.8 Clone Channel 2 – X2
The X2 option specifies Channel 2 configuration to match the Channel 1 bands and modes.
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1.2.3.9 Extended C Band – XC
The XC option specifies a new frequency limit for C band receivers. The standard frequency range for C band is
4400.0 MHz to 5150.0 MHz. The extended tuning range is 4400.0 MHz to 5250.0 MHz.
1.2.3.10 Extended Frequency All Bands – XF
The XF option specifies extended frequency ranges for all enabled bands. Refer to Table 3 for extended ranges.
Table 3: Extended Band Frequency Ranges
Band
Standard Frequency
Range
Extended Frequency
Range
P band (UHF)
400.0 MHz – 1150.0 MHz
200.0 MHz – 1150.0 MHz
Lower L
1435.5 MHz – 1534.5 MHz
1415.0 MHz – 1585.0 MHz
Upper L
1755.0 MHz – 1850.0 MHz
1650.0 MHz – 1855.0 MHz
S
2200.5 MHz – 2394.5 MHz
2185.0 MHz – 2500.0 MHz
C
4400.0 MHz – 5150.0 MHz
4400.0 MHz – 5250.0 MHz
1.2.3.11 Extended Lower L Band – XL
The XL option specifies a new frequency limit for Lower L band receivers. The standard frequency range for Lower
L band is 1435.5 MHz to 1534.5 MHz. The extended tuning range is 1415.0 MHz to 1585.0 MHz.
1.2.3.12 Extended P Band – XP
The XP option specifies a new frequency limit for P band receivers. The standard frequency range for P band is
400.0 MHz to 1150.0 MHz. The extended tuning range is 200.0 MHz to 1150.0 MHz.
1.2.3.13 Extended S Band – XS
The XS option specifies a new frequency limit S band receivers. The standard frequency range for S band is 2200.5
MHz to 2394.5 MHz. The extended tuning range is 2185.0 MHz to 2500.0 MHz.
1.2.3.14 Extended Upper L Band – XU
The XU option specifies a new frequency limit for Upper L band receivers. The standard frequency range for Upper
L band is 1755.0 MHz to 1850.0 MHz. The extended tuning range is 1650.0 MHz to 1855.0 MHz.
1.3 Package Contents
The contents of the box include the following:
• Rack-Mount receiver unit
• Power cord
• CD with user manual, data sheets, etc.
• Four (4) rubber feet with adhesive for lab bench use
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2 Specifications
Characteristic
Specification
Receiver Section
Type
Dual-conversion superheterodyne
Standard Input RF Frequency
P band: 400.0 MHz – 1150.0 MHz
Lower-L band: 1435.0 MHz – 1534.5 MHz
Upper-L band: 1755.0 MHz – 1850.0 MHz
S band: 2200.5 MHz – 2394.5 MHz
C band: 4400.0 MHz – 5150.0 MHz
P and S bands: 400.0 MHz – 1150.0 MHz and
2200.5 MHz – 2394.5 MHz
S and C bands: 2200.5 MHz – 2394.5 MHz and
4400.0 MHz – 5150.0 MHz
Tri band: Lower L, Upper L, S
Quad band: Lower L, Upper L, P, and S
Quad band: Lower L, Upper L, S, and C
5-band: Lower L, Upper L, S, C, and P
Tuning resolution
Tunes in 62.5 kHz increments, to the 70 MHz IF output, after the 70 MHz IF output,
receiver tunes in increments of less than 1 Hz
Frequency stability
1 ppm over temperature
1 ppm per year aging
Reference oscillator
20 MHz
Noise figure
3.5 dB (typical), 5 dB (maximum)
LO phase noise, measured at 70 MHz
IF output
-115 dBc/Hz @ 1 MHz offset
Maximum RF input
+20 dBm (+10 dBm for C-band)
Available gain (to 70 MHz IF output)
114 dB
Gain control
128 dB control range
User selectable: AGC or MGC (AGC freeze)
AGC time constant
Adjustable to any value from 0.1 ms to 1000 ms
First IF bandwidth
60 MHz (nominal)
IF rejection
> 90 dB
Image rejection
70 dB
RF input impedance
50 ohms
VSWR
3:1 Max; 2.5:1 Typical
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Characteristic
Specification
Second IF Section
IF frequency
70 MHz
IF output level
0 dBm nominal (AGC mode)
IF output impedance
50 ohms
VSWR
2:1 Max; 1.5:1 Typical
IF bandwidths
250 kHz, 500 kHz, 1 MHz, 2 MHz, 4.5 MHz, 10 MHz, 20 MHz, 40 MHz. Automatic
selection based on modulation type and data rate, with manual override.
Optional: 70 kHz, 1.4 MHz, 3 MHz, 6 MHz, 14 MHz, 28 MHz
Demodulator Section
Demodulator type
ARTM Tier 0 (PCM/FM), ARTM Tier I (SOQPSK-TG), ARTM Tier II (Multi-h CPM)
Legacy suite: Analog FM, BPSK, QPSK, Offset QPSK (OQPSK), Asymmetric
QPSK (AQPSK), Unbalanced QPSK (UQPSK), Asymmetric Unbalanced QPSK
(AUQPSK), Digital PM
Bit Rates
Tier 0: 24 kbps to 23 Mbps in 1 bps steps
Tier I: 100 kbps to 46 Mbps in 1 bps steps
Tier II: 1 Mbps to 46 Mbps in 1 bps steps
Legacy: 25 kbps to 20 Mbps in Analog FM, 50 kbps to 10 Mbps in BPSK,
20 Mbps in QPSK in 1 bps steps
Synchronization time
(Average, at BER = 1e-5)
Tier 0: 250 bits, Tier I: 385 bits, Tier II: 2,800 bits
Synchronization threshold
Tier 0: -8.0 dB Eb/N0; RF Input (dBm): -118.0 (1 Mbps), -108.0 (10 Mbps)
Tier I: -6.0 dB Eb/N0; RF Input (dBm): -116.0 (1 Mbps), -106.0 (10 Mbps)
Tier II: -7.0 dB Eb/N0; RF Input (dBm): -117.0 (1 Mbps), -107.0 (10 Mbps)
Sensitivity (BER = 1e-5)
Tier 0: 8.6 dB Eb/N0; RF Input (dBm): -101.4 (1 Mbps), -91.4 (10 Mbps)
Tier I: 11.2 dB Eb/N0; RF Input (dBm): -98.8 (1 Mbps), -88.8 (10 Mbps)
Tier II: 13.0 dB Eb/N0; RF Input (dBm): -97.0 (1 Mbps), -87.0 (10 Mbps)
Bit Synchronizer Section
Input codes
NRZ-L/M/S, BIФ-L/M/S
Output codes
NRZ-L/M/S, BIФ-L/M/S
Data and clock out
TTL (BNC) or RS-422 (Triax)
Lock detector out
TTL
Derandomizer
Standard IRIG 15-stage polynomial, selectable On/Off
Video Section
Video out
Dual wideband outputs, DC to 35 MHz
Video filter bandwidth
User programmable
Output level
1 Vp-p nominal, 4 Vp-p maximum
NTSC de-emphasis
Selectable On/Off
Environmental Section
Operating Temperature
0°C to +50°C
Non-operating Temperature
0°C
to
+70°C
Operating Humidity
0 to 95% (non-condensing)
Altitude
Up to 30,000 ft. (with the no displays options)
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Characteristic
Specification
Physical Section
Size
1U rack-mount chassis; 19” wide, 1.75” tall, 14-5/16” rack depth, 15-11/16” overall
depth
Weight
10.4 lbs. (dual-channel)
Connectors – per RF channel
RF In: Type-N female
I Out, Q Out, Clock Out, Data Out, IF Out, AGC Out, AM Out: BNC female
Status/SDI Out: DB-15 High Density female
Connectors – combined channel
Clock Out, Data Out, AGC Out, AM Out: BNC female
Connectors – per chassis
Ethernet: RJ-45
Data: USB
Programming: MDM-25 male
Power
100 to 240 VAC, 50/60 Hz
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3 Installation Instructions
3.1 Mechanical
The RM RDMS™ Telemetry Receiver’s enclosure fits in a standard 19” rack, occupying just 1U of rack space.
Mechanical layouts are provided in Figure 4 and Figure 5.
Figure 2: Mechanical Drawing – Front View
Figure 3: Mechanical Drawing – Top View (Dual-channel Connectors Shown)
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Figure 4: Interior 3-D Drawing of Single-Channel Receiver
Figure 5: Portable 19” Rack Installation with Four RDMS™ Units Shown
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3.2 Thermal
The storage temperature of the RM RDMS™ unit is rated for 0°C to +70°C, while the operating temperature is rated
for 0°C to +50°C. It is recommended that the unit be kept in a temperature controlled environment to minimize the
risk of operating (or storing) outside the ranges specified. In particular, the four liquid crystal displays on the front
panel are extremely sensitive to low temperatures.
The RM RDMS™ features cooling vents on both sides of its aluminum chassis. These vents must be kept entirely
unobstructed in order to allow for maximum airflow through the system. Whenever feasible, it is helpful to leave an
open rack space above and below the RM RDMS™ for additional heat dissipation.
3.3 Electrical
The RM RDMS™ is available in single- or dual- channel configurations, with all pertinent electrical connections
found on the rear panel.
3.3.1 Rear Panel Connections
Rear panel connectors are the same for all receivers; however, in a single-channel configuration all connectors are
not active.
An optional pre-detection diversity combiner is available in the dual-channel receiver configuration. Connectors for
the diversity combiner are present whether the feature is ordered or not. The electrical interface connectors for all
configurations are shown in Figure 6.
Figure 6: Rear Panel
Functional descriptions and electrical characteristics for each connector located on the rear panel are described in
Table 4.
Table 4: Rear Panel Connector Specifications
Connector
Function
Electrical Characteristics
Connector Type
J1
1
I Out, video
50 ohms, DC coupled
J2
1
Q Out, video
50 ohms, DC coupled
J3
1
Clock Out
75 ohms, 3.3V TTL
J4
1
Data Out
75 ohms, 3.3V TTL
J5
1
AGC Out
1k ohms, DC coupled
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Connector
Function
Electrical Characteristics
Connector Type
J6
1
AM Out
75 ohms, DC coupled
J7
1
CH1 SDI, CH1 Lock Detect, CH1 Clock
and Data B, Combiner Clock and Data B
HD15 D-Sub
J8
1
RF Input
50 ohm unbalanced
J9
2
IF Out, 70 MHz
50 ohm unbalanced
J10
1
IF Out, 70 MHz
50 ohm unbalanced
J11
2
I Out, video
50 ohms, DC coupled
J12
2
Q Out, video
50 ohms, DC coupled
J13
2
Clock Out
75 ohms, 3.3V TTL
J14
2
Data Out
75 ohms, 3.3V TTL
J15
2
AGC Out
1k ohms, DC coupled
J16
2
AM Out
75 ohms, DC coupled
J17
2
CH2 SDI, CH2 Lock Detect, CH2 Clock
and Data B
HD15 D-Sub
J18
2
RF Input
50 ohm unbalanced
J19
Combined
Clock Out
75 ohms, 3.3V TTL
J20
Combined
Data Out
75 ohms, 3.3V TTL
J21
Combined
AGC Out
50 ohms, DC coupled
J22
Combined
AM Out
50 ohms, DC coupled
J23
Not
Applicable
Factory Use Only
25 pin Micro-D
J24
Not
Applicable
Ethernet control
Standard PC Ethernet
port
3.3.1.1 Channel 1 HD15 D-Sub Pinout
The pinout for J7, the HD15 D-sub connector, is shown in Table 5. Pin locations are illustrated in Figure 7.
Table 5: Channel 1 HD15 D-Sub Pinout (J7)
Pin
Electrical Char.
Pin
Electrical Char.
Pin
Electrical Char.
1
SDI Out
6
GND
11
CH1 Clock D
2
GND
7
CH1 Clock B
12
GND
3
CH1 Demod Lock
8
GND
13
CH1 Data D
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Pin
Electrical Char.
Pin
Electrical Char.
Pin
Electrical Char.
4
GND
9
CH1 Data B
14
GND
5
CH1 Ones Detect
10
GND
15
N/C
Figure 7: HD15 D-Sub Pin Locations
3.3.1.2 Channel 2 HD15 Pinout
The pinout for J17, the HD15 D-sub connector, is shown in Table 6. Pin locations are illustrated in Figure 7.
Table 6: Channel 2 HD15 D-Sub Pinout (J17)
Pin
Electrical Char.
Pin
Electrical Char.
Pin
Electrical Char.
1
CH SDI Out
6
GND
11
N/C
2
GND
7
CH2 Clock B
12
N/C
3
CH2 Demod Lock
8
GND
13
N/C
4
GND
9
CH2 Data B
14
N/C
5
CH2 Ones Detect
10
GND
15
N/C
3.3.2 Electrical Signals
By default, the output data is valid on the falling edge of the clock, as shown in Figure 8. The polarity of the output
clock may be inverted by toggling the Clock Polarity setting in either user interface. The RM RDMS™ can be
operated through its front panel interface or Ethernet-based remote client interface (Remote RDMS™ Client).
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Figure 8: Baseband Signal Timing
The RF input to the receiver is a 50 ohm interface.
The RM RDMS™ also provides a 70 MHz IF output for each channel for troubleshooting purposes. The IF is
resistively coupled from the input of the demodulator. Therefore, the signal level on the IF output should be within 2
dB of the demodulator’s input.
3.4 Remote Control Interface
The receiver’s remote control interface, Remote RDMS
TM
Client (also referred to as “RRC”, or simply “the client”)
is an Ethernet-based graphical user interface that enables configuration and monitoring of one, or multiple, RM
RDMS™ units on the user’s network. The client provides easy-to-read, real-time status information to the user, thus
eliminating the need for direct access to the front panel.
RRC is built upon Microsoft’s ubiquitous .NET Framework, which is a software-based coding foundation that
facilitates consistent application performance across various hardware platforms, as well as enhanced security. .NET
is compatible with Windows XP, Windows Vista, and Windows 7.
To install RRC from the accompanying CD:
1. Go to the “Remote RDMS Client Install” folder at the root level of the CD.
2. Double-click on the “Setup.exe” file and the installation will begin.
Depending on the operating system, the user may receive an application install security warning that says the
publisher cannot be verified. Click on the ‘Install’ screen button to continue. Toward the end of installation, the
Windows firewall may ask the user if they wish to block the application. The user should click on ‘Unblock’ to
enable the Remote RDMS™ Client.
Following installation, the program can be found under the following Windows path:
Start > All Programs > Quasonix Tools > Remote RDMS > Client
Windows Vista and Windows 7 include .NET by default; however certain Vista users may still be prompted during
the RRC installation process to install the latest version of .NET, which is included on the CD under the folder
“Quasonix Client Dot Net Support”.
Bit period
(360 deg)
Clock jitter and data to clock
skew reference point
data=1 (MARK)
data=0 (SPACE)
CLOCK
NRZL
DATA
Baseband Signal Timing - 0 degree clock
data=1 (MARK)
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For issues that occur during installation, call Quasonix Technical Support at 513-942-1287.
3.4.1 Network Requirements
The following parameters are required for RRC to operate properly within a network:
• Multicast must be enabled on the network level
• Network or local firewalls must provide for a means to open up ports for the Remote RDMS™ Client to
communicate with the receiver through the network, otherwise the software will not work properly
Note: Certain real-time antivirus and firewall programs, such as Symantec’s Endpoint Protection, are known to
block the ports used by the Remote RDMS™ Client application without alerting the user. Others, such as
Microsoft’s Windows Built-in Firewall, alert the user of the action and allow for the decision to be overridden. If
communications between the RRC and the rack unit are being disrupted by the user’s antivirus and firewall
program, Quasonix recommends temporarily disabling it.
If an inexpensive broadband router is used instead of a switch or hub to connect the computer and the rack unit,
check each unit’s Ethernet cable connections to be sure that they are not connected to the WAN port on the
broadband router.
After the RRC has successfully established a connection, refer to your firewall documentation for allowing multicast
and or RRC program access. The following IP and port addresses may be useful for troubleshooting firewall issues:
RRC Multicast IP addresses and Ports:
MULTICAST IP Address 224.168.200.1
MULTICAST IP Address 224.168.200.2
MULTICAST PORT 65000
MULTICAST PORT 65001
Graphical data broadcasting and advanced settings may require additional UDP ports to be opened. If you are
experiencing problems with Advanced Settings in the ‘Selected RDMS Control’ dialog or with the ‘Selected RDMS
Performance Monitoring’ dialog in the RRC program, then additional ports need to be opened. These additional
ports can be found under ‘Tools > Network Settings’ in the RRC application.
Note: These ports are based on the RDMS’ unique IP address; therefore a static IP address may be advisable if your
DHCP server or device changes the IP address of the RDMS™.
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4 Operating Instructions
The RM RDMS™ can be operated through its front panel interface or via the Ethernet-based remote client interface
(Remote RDMSTM Client). The client is capable of configuring, maintaining, and monitoring multiple receivers
within a network.
4.1 Front-Panel Control
The Rack-Mount Receiver’s comprehensive front panel interface includes (4) 64k-color liquid crystal displays
(LCDs) for displaying receiver status, configuration settings, and waveform graphics; individual function keys for
the most common settings; and a complete numeric keypad for convenient parameter entry.
In a single-channel configuration, waveform graphics are displayed on the left-most LCD and receiver settings are
on the second LCD from the left. A static Quasonix logo is shown on the two right-most LCDs.
In a dual-channel receiver, the two LCDs located to the left of the keypad are designated for Channel 1, while the
other two LCDs are designated for Channel 2, as shown in Figure 9. The LCDs for Channel 2 are oriented such that
the receiver settings are found on the left LCD—closest to the keypad—and the waveform graphics on the right
LCD.
Figure 9: Front Panel Diagram for Dual-Channel Configuration
The front panel keypad is shown in Figure 10.
Figure 10: Front Panel Keypad
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4.1.1 Waveform Graphics
Each channel’s waveform graphics display provides a real-time visual representation of the received signal’s
constellation, or eye pattern in the case for PCM/FM.
An example of a PCM/FM eye pattern, taken from a spectrum analyzer, is shown in Figure 11.
Figure 11: Example PCM/FM Eye Pattern
An example of an SOQPSK constellation is shown in Figure 12.
Figure 12: Example SOQPSK Constellation
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In addition to the eye pattern or constellation, the waveform graphics screen displays signal strength and signal
quality in vertical bar graph form, a red line AGC Zero On indicator in the Signal Strength bar, and signal lock
detect through a padlock icon, as shown in Figure 13.
Figure 13: Waveform Graphics LCD with Locked PCM/FM Signal
The signal strength bar, the left of the two with the letter “S” below it, is measured in dBm with an unspecified
range of -120 dBm to +10 dBm. When a signal -100 dBm or higher is detected, the bar turns green to signify “good”
signal strength.
The measurement of strength from an incoming telemetry signal by itself does not provide enough information
about the integrity of the received data. Therefore, the signal quality metric is displayed to the right of the signal
strength bar, with “Q” below the graph.
Signal quality is displayed as a unit-less metric with a range from 0 to 99. When the receiver locks onto a signal, the
signal quality bar turns green. Otherwise, the bar is displayed in red.
4.1.1.1 Signal Quality
The Signal Quality indicator is derived from an estimate of the Signal-to-Noise Ratio (SNR) of the received signal.
This estimate is calculated identically for all modes using one of two algorithms selected by the choice of SNR
Estimator (refer to sections 4.1.5.22 and 4.2.3.1.2.9.4 for further details).
4.1.2 Navigation
The Rack-Mount Receiver’s traditional hierarchical menu structure is navigated using the arrow and Enter keys on
the front panel keypad, as shown in Figure 14.
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Figure 14: Front Panel Navigation Keys
4.1.3 Selecting a Receiver Channel
In a single-channel configuration all front panel keys are active for the receiver. In a dual-channel configuration,
Channel 1 will be active upon start-up by default. To toggle control between the channels, press the Select Unit key
on the front panel keypad.
Figure 15: Select Unit Key
The LCD dedicated to receiver settings that is under active control will feature a solid blue header bar and yellow
text. The channel number displays in the top left hand corner of the screen. In Figure 16, “CH 1” designates channel
1.
Figure 16: Active Main Menu Settings LCD
Meanwhile, the LCD(s) for an inactive receiver will feature a menu bar that is grayed out and text that displays in
white, as shown in Figure 17.
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Figure 17: Inactive Main Menu Display Grayed Out – Other Channel Active
The Wait message, shown in Figure 18, displays whenever the RDMS™ is busy—generally when processing a
command for longer than one second. This usually occurs during a Mode change or Ethernet configuration.
Figure 18: Inactive Main Menu Display with Wait Message
4.1.4 Main Menu Settings
The available options from the Main Menu screen include the following:
• Frequency
• Mode
• Bit Rate
• Combiner (Diversity Combiner option only)
• Frequency Diversity (Diversity Combiner option only)
• Data
• Clock
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• Derandomizer
• Force Break Lock (PSK modes only)
• Modulation Scaling (PCM/FM mode only)
• Modulation Persistence (PCM/FM mode only)
• Differential Encoder (SOQPSK-TG mode only)
• AGC Menu
• AM Menu
• Options Menu
• Advanced Menu
Note: Several of the Main Menu settings are also available via direct access function keys located to the left of the
numeric keypad. These include Frequency (‘Freq’), Mode, and Bit Rate (‘Rate’). The front panel keypad is shown in
Figure 19. Depending on the number of options provided with the RDMS™, some menu items may not display
when the RDMS™ is powered on. To see additional LCD menu options, use the arrow keys to scroll up or down.
The complete list redisplays continuously forward or backward, depending on which arrow key is pressed.
Figure 19: Front Panel Keypad
To change a setting or access a secondary menu, use the arrow keys to navigate to the parameter. Once highlighted,
the Enter key prompts a secondary menu screen or a setting screen, or even change the setting itself if there are only
two possible states. To back out of a sub-menu, press the Escape key, ‘Esc’ on the front keypad.
4.1.4.1 Setting Frequency
There are two methods available to the user to set the receiver’s frequency. The first one is to press the Freq key on
the front panel keypad. The second method is to highlight the Frequency option on the Main Menu, then press the
Enter key on the PC keyboard.
Figure 20: Frequency Key on Front Panel
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Figure 21: Main Menu, Frequency Setting
Either method displays a frequency dialog screen prompting the operator to enter a frequency using the rack’s front
panel keypad.
Figure 22: Frequency Entry Screen
The default frequency is highlighted. The user can use the front panel keypad to:
a. Delete the entire number by pressing the left arrow key
b. Move the cursor to the end of the number by pressing the right arrow key
c. Begin typing the desired frequency, in MHz, using the numeric keypad
For example, to set the frequency of an S-band receiver to 2250.5 MHz, press the following key combination:
Figure 23: Example Keypad Combination for Setting Frequency
The available center frequencies are based on the band(s) and any extended options that are ordered, as shown in
Table 7.
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Table 7: Band and Frequency Combinations
Band
Standard Frequency Range
Extended Frequency Range
P band (UHF)
400.0 MHz – 1150.0 MHz
200.0 MHz – 1150.0 MHz
Lower L
1435.5 MHz – 1534.5 MHz
1415.0 MHz – 1585.0 MHz
Upper L
1755.0 MHz – 1850.0 MHz
1650.0 MHz – 1855.0 MHz
S
2200.5 MHz – 2394.5 MHz
2185.0 MHz – 2500.0 MHz
C
4400.0 MHz – 5150.0 MHz
4400.0 MHz – 5250.0 MHz
P and S (Dual band)
400.0 MHz – 1150.0 MHz and
2200.5 MHz – 2394.5 MHz
Refer to P and S ranges above
S and C (Dual band)
2200.5 MHz – 2394.5 MHz and
4400.0 MHz – 5150.0 MHz
Refer to S and C ranges above
Lower L, Upper L, and S
(Tri-band)
1435.5 MHz – 2394.5 MHz
Refer to band ranges above
P, Full-L, and S
(Quad band)
400.0 MHz – 2394.5 MHz
Refer to band ranges above
Full L, S, and C
(Quad band)
1435.5 MHz -5150.0 MHz
Refer to band ranges above
P, Full L, S, and C
(Five band)
400.0 MHz – 5150.0 MHz
Refer to band ranges above
4.1.4.2 Setting Mode
To set the mode, or modulation, press the Mode key on the front panel keypad for a display of the available choices.
Use the keypad arrows to navigate to the desired mode, and then press the Enter key.
Figure 24: Main Menu, Mode Setting
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Due to character limitations in the on-screen menu, some modulation names have been shortened. The following
table lists the modes, as they will appear on the screen in the left column, with the generally accepted naming
convention in the right column.
Table 8: Modulation Naming Convention
Screen Name
Actual Name
PCMFM
PCM/FM
SOQPSK
SOQPSK-TG
MhCPM
Multi-h CPM / ARTM CPM
BPSK
BPSK
QPSK
QPSK
AQPSK
AQPSK
AUQPSK
AUQPSK
OQPSK
OQPSK
UQPSK
UQPSK
DPM
Digital PM
SOQPSKLDPC
SOQPSK with LDPC Decoder
Note: Changing modes causes the receiver to reload the FPGA, which takes approximately 10 seconds to complete.
A ‘Busy’ icon appears in the top right-hand corner of the front panel display screen to indicate that the unit is being
re-configured. The unit is temporarily unavailable while the ‘Busy’ icon is present.
4.1.4.3 Setting Bit Rate
There are two methods available to the user to set the receiver’s bit rate. The first one is to press the Rate key on the
front panel keypad. The second method is to highlight the Bit Rate option on the Main Menu, then press the Enter
key on the PC keyboard.
Figure 25: Rate Key on Front Panel
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Figure 26: Main Menu, Bit Rate Setting
Either method displays a bit rate dialog screen prompting the operator to enter a bit rate using the rack’s front panel
numeric keypad, in Mbps. A decimal point is only needed for bit rates with fidelity down into the kilobits per second
range.
Figure 27: Bit Rate Entry Screen
For example, to set the bit rate to 10 Mbps, press the following key combination:
Figure 28: Example Keypad Combination for Setting Bit Rate
If an out-of-range bit rate is entered, the maximum or minimum possible rate will be set by default. For instance, if
the user attempts to set the bit rate to 50 Mbps in SOQPSK-TG mode, the receiver will default back to 46 Mbps, the
highest possible rate in that particular mode.
4.1.4.4 Diversity Combiner (Optional)
A pre-detection diversity combiner is available as an option for dual-channel receivers.
If diversity combining is installed on the RDMS™, it can be enabled through the Main Menu > Combiner option.
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Figure 29: Main Menu, Combiner Setting
When the combiner is enabled on one channel, the second channel will automatically reflect this change.
Additionally, any parameter changes made by the user in one channel will automatically be made for the second
channel, from which the combined signal is partially derived. The only setting that can still be changed individually
when the diversity combiner is turned on is the channel frequency, which allows for frequency diversity to be
implemented. To illustrate the synchronization of settings, the second channel’s settings menu highlight bar will
mimic the navigation path being taken by the user in the first channel.
Note: Whenever the Diversity Combiner is On, any changes made to the Frequency option (even with Frequency
Diversity On enabled) causes Modulation Scaling for both channels to be set to the same value. However, if Mod
Scaling was set to Locked when the Frequency was changed, Mod Scaling will change to Tracking.
4.1.4.5 Frequency Diversity (Available with Diversity Combiner)
The Frequency Diversity option allows the user to independently change the frequency of each channel when the
diversity combiner is On.
The FreqDiversity option is toggled On or Off using the Enter key on the front panel keypad.
If there are two channels, the Combiner is set to On, and Frequency Diversity is Off, the channels are updated
simultaneously.
Figure 30: Main Menu, Frequency Diversity Setting
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4.1.4.6 Setting Data Polarity
The Data option on the Main Menu is for adjusting the data polarity. The parameter options are Normal and
Inverted. To change the polarity, press the Enter key when the parameter is highlighted from the Main Menu. The
default is Normal.
Figure 31: Main Menu, Data Setting
4.1.4.7 Setting Clock Polarity
The Clock option on the Main Menu is for adjusting the clock polarity. The parameter options are Normal and
Inverted. To change the polarity, press the Enter key on the front panel keypad when the parameter is highlighted on
the Main Menu. The default is Normal.
Figure 32: Main Menu, Clock Setting
4.1.4.8 Derandomizer State
The RM RDMS™ includes a derandomizer, which can be enabled (On) or disabled (Off) by selecting the parameter
from the Main Menu and pressing the Enter key on the front panel keypad. The default setting for the derandomizer
is Off.
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Figure 33: Main Menu, Derandomizer Setting
4.1.4.9 Force Break Lock (PSK Modes Only)
The RDMS™ provides very rapid, robust synchronization. Nevertheless, it is possible that the demodulator declares
a lock, yet the output data appears to be incorrect. This can happen when there is significant interference, for
example. The Force Break Lock parameter allows the user to break the demodulator’s signal lock condition, forcing
it to reacquire signal lock.
To activate the Force Break Lock and reacquire a signal lock, use the down arrow key on the front panel keypad to
scroll to the Force Break Lock. Press the Enter key to continue.
Figure 34: Main Menu, Force Break Lock
4.1.4.10 Modulation Scaling (PCM/FM Mode Only)
Modulation Scaling is a method used to retain the maximum trellis coding gain of a non-ideal FM signal. There are
four possible settings: Tracking, Locked, Off, or Acquire.
4.1.4.10.1 Modulation Scaling - Tracking
When the RDMS™ is powered on, the default setting is Tracking, unless the unit was powered off from a preset
condition. If the unit was powered off from an unmodified preset setting, then the default condition of Modulation
Scaling is as defined in the preset. When Tracking is set, the modulation scale index is actively being tracked.
Note: The active setting is not saved when the rack is powered off, unless the Mod Persist option was set to On.
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Frequency, mode, and bit rate changes, or any changes to a preset, cause the Modulation Scaling setting to revert
back to Tracking. This is because the optimal signal monitoring is no longer valid.
Note: Whenever the Diversity Combiner is On, any changes made to the Frequency option (even with Frequency
Diversity On enabled) causes Modulation Scaling for both channels to be set to Tracking.
Figure 35: Main Menu, Modulation
Scaling – Tracking
Figure 36: Red Eye Pattern Display -
Tracking
The graphing eye pattern is displayed in red when in Tracking mode.
If there are two channels, and the Combiner is set to On, the Modulation Scaling controls for setting the modes are
linked. In Acquire or Tracking mode, the actual scaling operation functions independently in each channel.
4.1.4.10.2 Modulation Scaling - Locked
When the RDMS™ has a good lock on the target transmitter, Modulation Scaling should be set to Locked by
highlighting the Mod Scaling option on the Main Menu and then pressing the Enter key on the keypad.
When Modulation Scaling is set to Locked, the graphing eye pattern is displayed in green, indicating the optimal
modulation index is set.
Figure 37: Main Menu, Modulation
Scaling – Locked
Figure 38: Green Eye Pattern Display
- Locked
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If Modulation Scaling is set to Locked, as shown in Figure 37, the active modulation scale index is also locked in on
a particular setting. The modulation scale index number displays next to the Locked setting.
If an index number was entered manually using the Mod Scale Index option (on the Mod Scaling Menu),
Modulation Scaling is simultaneously changed to Locked and reflects the Index value set via the Mod Scaling
Menu.
Locked index numbers, manually or automatically selected, are lost when the Mod Scaling option is set to Tracking,
Off, or Acquire. If the Locked index number is to be retained following a power-off cycle of the rack, then turn on
the Mod Persist option via the Main Menu. Refer to section 4.1.4.11, Modulation Persistence.
4.1.4.10.3 Modulation Scaling - Off
The Mod Scaling Off setting is shown in Figure 39. When Modulation Scaling is set to Locked, the graphing eye
pattern is displayed in green, indicating the optimal modulation index is set.
Figure 39: Main Menu, Modulation
Scaling – Off
Figure 40: Green Eye Pattern Display
- Off
With Mod Scaling turned Off, the Mod Index is set to the optimal 0.700. Mod Scaling should be turned off when a
new generation, digitally synthesized transmitter is the source. Digitally synthesized transmitters do not have a
variable deviation sensitivity adjustment, and as such are not subject to inaccurate modulation index settings
4.1.4.10.4 Modulation Scaling - Acquire
Acquire mode has two states: Armed and Triggered. When Modulation Scaling is set to Acquire, in the absence of
signal, the eye pattern will turn yellow, as shown in Figure 42, the state is set to Armed. In Armed state, modulation
scaling operates continuously.
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Figure 41: Main Menu, Modulation
Scaling – Acquire
Figure 42: Yellow Eye Pattern
Display - Acquire
If the receiver is locked and the delta h (the change in modulation index) has settled below the delta h threshold for
the specified settling time, the state changes to Triggered, and the eye pattern will turn green. In Triggered mode, the
estimated h (modulation index) is monitored but the scale is not updated.
If delta h goes above the delta h threshold and settles again, the receiver is still locked, and the Eb/N0 at the settling
point is higher than the last settling point, the current scaling is updated with the new estimate. There is no transition
from Triggered back to Armed except for setting the mode to Acquire again.
4.1.4.11 Modulation Persistence (PCM/FM Mode Only)
The Mod Persist option allows the current state of the Mod Scaling setting to be retained following a power-off
cycle of the rack. The default value is Off, as shown in Figure 43.
Figure 43: Main Menu, Modulation Persistence – Off
To retain a Locked index number, or to remain in Acquire mode, scroll to the Mod Persist option, then toggle the
setting to On.
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Figure 44: Main Menu, Modulation Persistence – On
4.1.4.12 Differential Decoder
In SOQPSK-TG mode, differential encoding and decoding eliminates the phase ambiguity inherent with the
received data. The differential decoder can be enabled or disabled through the Main Menu by pressing Enter when
the parameter is selected. The Enter key acts as a toggle switch. Normal SOQPSK operation requires the differential
decoder to be On.
Figure 45: Main Menu, Differential Decoder Setting
4.1.4.13 AGC Menu
Access the Automatic Gain Control (AGC) menu from the front panel Main Menu. Select the AGC Menu, and then
press the Enter key on the front panel keypad.
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Figure 46: Main Menu, AGC Menu Selection
The AGC (Automatic Gain Control) menu includes the following parameters:
• AGC state (On / Off)
• Polarity (+ / -)
• Gain (00)
• Time Constant (in ms)
• AGC Zero Hold (On / Off)
• AGC Zero
The user may toggle the AGC state, Polarity, and AGC Zero Hold values by highlighting the desired parameter and
pressing the Enter key on the front panel keypad until the desired value displays.
Figure 47: AGC Menu, AGC and Polarity Highlighted
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Figure 48: AGC Menu, AGC Zero Hold Off Highlighted
To change the Gain or Time Constant values, select Gain or Time Constant, then press the Enter key on the front
panel.
Figure 49: AGC Menu, Gain and Time Constant Highlighted
A dialog screen displays prompting the operator to enter a new AGC Gain or Time Constant using the rack’s front
panel numeric keypad. When the new value is entered, press the Enter key on the keypad.
Figure 50: AGC Gain and Time Constant Entry Screens
AGC Zero Hold causes the receiver to hold its zero setting, even if other parameters are changed. With AGC Zero
Hold OFF, the receiver resets the AGC Zero value for any change of Mode, Bit Rate, or Frequency.
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AGC Zero is used to set a baseline for background radio noise levels. The front panel displays provide visual
indications whether the AGC is zeroed or not. If AGC Zero has not been set, the signal strength bar displays in
yellow and lacks the red zero indication line, shown in Figure 51.
Figure 51: Waveform Graphics Before AGC Zero Set
A typical application of the AGC Zero function is explained in the following example.
1. Connect the receiver to its normal RF signal source, such as antenna, LNA, cabling, and splitters.
2. Orient the receiving antenna in a direction that is expected to yield the lowest signal level that the receiver
is likely to encounter.
3. Activate AGC Zero under this condition. (Scroll to AGC Zero, and then press the Enter key on the front
panel, as shown in Figure 52.)
4. An AGC Zero Set message briefly displays, as shown in Figure 53, to indicate AGC Zero is activated.
5. After the AGC Zero is set, the signal strength bar changes from yellow to green, and a red line indicates the
zero value set, as shown in Figure 54.
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Figure 52: AGC Menu, AGC Zero Highlighted
Figure 53: AGC Menu, AGC Zero Set Message
Figure 54: Waveform Graphics After AGC Zero Set
The AGC output voltage is set to zero volts DC at a time when the receiver input is at its minimum value.
This process ensures that the AGC output voltage will not cross through zero volts DC under normal
operation.
4.1.4.14 AM Menu
Access the Amplitude Modulation (AM) menu from the front panel Main Menu. Select AM Menu, then press the
Enter key on the front panel keypad.
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Figure 55: Main Menu, AM Menu Selection
The AM (Amplitude Modulation) menu includes the following parameters:
• Bandwidth (00)
• Time Delay (0)
• Polarity (+/-)
• Scale (0.5-2.5)
• AGC COMP (On / Off)
To change the Bandwidth, Time Delay, or Scale values, select the appropriate option, as shown in Figure 56 and
Figure 57, then press the Enter key on the front panel.
Figure 56: AM Menu, Bandwidth and Time Delay Highlighted
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Figure 57: AM Menu, Scale Highlighted
A dialog screen displays prompting the operator to enter a new AM Bandwidth, Time Delay, or Scale using the
rack’s front panel numeric keypad, as shown in Figure 58 and Figure 59. When the new value is entered, press the
Enter key on the keypad.
The AM Bandwidth can be set from 0.1 to 5 kHz
The AM Scale has a range from 0.1 to 2.5. At its default setting of 1, the response is 2V p-p, into a 75 ohm load with
a 50% AM.
Figure 58: AM Bandwidth and Time Delay Entry Screens
Figure 59: AM Scaling Entry Screen
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The user may toggle the AM Polarity value by pressing the Enter key on the keypad.
Figure 60: AM Menu, AM Polarity Highlighted
The user may toggle the AGC COMP state by highlighting the AGC COMP and pressing the Enter key on the front
panel keypad until the desired value displays. Refer to Appendix B for more information about the AGC COMP
function.
Figure 61: AM Menu, AGC COMP Highlighted
4.1.5 Options Menu
The Options Menu, which is accessed through the Main Menu, provides the following selections:
• Save Rack Presets Menu
• Load Rack Presets Menu
• Save Rack Presets -> USB
• Load Rack Presets <- USB
• Save a USB Preset 1
• Load a USB Preset 1
• Status Menu
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• Network Menu
• LCD Backlight
Figure 62: Main Menu, Options Menu Selection
4.1.5.1 Save Rack Presets Menu
The Save Rack Presets Menu allows the current settings to be saved for convenient retrieval at a later time, or for
quickly switching between configurations. To save rack presets, select the appropriate option, as shown in Figure
63, then press the Enter key on the front panel.
Figure 63: Options Menu, Save Rack Presets Menu Selection
The Save Presets screen, shown in Figure 64, provides eight (8) slots for saving presets. Use the Up and Down
arrow keys to select a save slot with the message ‘Empty’. Pressing the ‘Enter’ key saves the current configuration
in that slot. When a Save is successfully stored, the menu displays the message ‘Full’ next to the selected save slot.
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Figure 64: Save Menu, Save Presets – Slot 1 Full, Slot 2 Empty
To replace or remove an existing save slot, press the CLR key (Clear). After the CLR key is pressed, the display
should show ‘Empty’ indicating the slot can be used again for saving a configuration.
4.1.5.2 Load Rack Presets Menu
The Load Menu allows previously stored configuration settings from the Save Rack Presets screen to be retrieved.
To load saved rack presets, select the appropriate option, as shown in Figure 65, then press the Enter key on the
front panel.
Figure 65: Options Menu, Load Menu Selection
The Load Presets screen, shown in Figure 66, displays eight (8) slots which may contain saved preset
configurations. When a saved configuration file exists, the menu displays the message ‘Available’ next to the load
slot. Use the Up and Down arrow keys to select a load slot with the ‘Available” message displayed. Pressing the
Enter key loads the stored preset and configures the receiver accordingly.
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Figure 66: Load Menu, Load Presets – Slot 1 Load Available, Slot 2 Empty
4.1.5.3 Save Rack Presets to USB
The Save Rack Presets to USB option allows the current rack presets (1 through 8) to be saved on a USB flash drive
(memory stick) as a single profile. To save rack presets to a USB flash drive, select the appropriate option, as shown
in Figure 67, then press the Enter key on the front panel.
Figure 67: Options Menu, Save Rack Presets to USB Selection
Insert a USB flash drive into the port on the front panel of the Rack-Mount RDMS™.
A dialog screen displays prompting the operator to enter a number between 0 and 999 using the rack’s front panel
numeric keypad, as shown in Figure 68. When the new value is entered, press the Enter key on the keypad.
Any number may be used to identify rack preset configurations saved onto a USB flash drive (memory stick). If
more than one configuration is saved, the number does not have to run sequentially, nor does it have to start at 0. For
example, one preset configuration might be saved as 44 and another might be saved as 397.
Another way of looking at this option is: An operator has saved any number of presets in slots 1 through 8 using
the Save Rack Presets Menu described previously. Now the operator wants to save the complete set of presets for
this rack onto a USB memory stick. The operator can save up to 1000 profiles (or sets of presets) for this rack (or
any other racks) onto the same USB memory stick. Even if all 1000 profiles (1000 sets of 8 presets) were saved,
they would still only take up about 112 MB of space on the USB stick.
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If the number entered is already in use, the entry screen shown in Figure 69 displays. To overwrite the existing file,
press the Enter key again. If the number was typed in error, press the Escape key on the keypad to cancel the Save.
Figure 68: Save Rack Presets to USB
Entry Screen
Figure 69: File Exists Error Screen
After successfully entering a preset number and pressing the Enter key, the Options Menu redisplays with one of
two message boxes. If the presets saved successfully, the box shown in Figure 70 displays. It confirms the location
and the name of the folder on the USB flash drive (memory stick). In this example, it is stored as profile 1. If there is
no flash drive (memory stick) in the USB port on the front panel of the Rack-Mount RDMS™, the message in
Figure 71 displays. Insert the flash drive into the USB port and redo the Save.
Figure 70: Options Menu, Rack
Presets Saved Message
Figure 71: Options Menu, USB Error
Message
4.1.5.4 Load Rack Presets from USB
The Load Rack Presets to USB option enables the user to select and load preset profiles (each profile is a set of
specific rack presets 1 through 8) previously saved on a USB flash drive (memory stick). To load rack presets from a
USB flash drive, select the appropriate option, as shown in Figure 72, then press the Enter key on the front panel.
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Figure 72: Options Menu, Load Rack Presets from USB Selection
Insert a USB flash drive into the port on the front panel of the Rack-Mount RDMS™.
A dialog screen displays prompting the operator to enter a number between 0 and 999 using the rack’s front panel
numeric keypad, as shown in Figure 73. When the new value is entered, press the Enter key on the keypad.
Figure 73: Load Rack Presets to USB Entry Screen
After successfully entering a preset number and pressing the Enter key, the Options Menu redisplays with one of
two message boxes. If the presets loaded successfully, the box shown in Figure 74 displays. It confirms the location
and the name of the folder on the USB flash drive (memory stick). In this example, it was stored as profile 1. If there
is no flash drive (memory stick) in the USB port on the front panel of the Rack-Mount RDMS™, the message in
Figure 75 displays. Insert the flash drive into the USB port and redo the Load.
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Figure 74: Options Menu, Rack
Presets Loaded Message
Figure 75: Options Menu, USB Error
Message
4.1.5.5 Save a USB Preset
The Save a USB Preset option allows up to 1000 presets to be saved on a USB flash drive (memory stick). This
option is similar to the Save Rack Presets option but instead of saving 1 through 8 presets directly on the RackMount RDMS™, this option allows up to 1000 presets to be saved by saving externally to a USB flash drive
(memory stick). To save a single preset to a USB flash drive, select the appropriate option, as shown in Figure 76,
then press the Enter key on the front panel.
Figure 76: Options Menu, Save a USB Preset Selection
Insert a USB flash drive into the port on the front panel of the Rack-Mount RDMS™.
A dialog screen displays prompting the operator to enter a number between 0 and 999 using the rack’s front panel
numeric keypad, as shown in Figure 77. When the new value is entered, press the Enter key on the keypad.
Any number may be used to identify rack preset configurations saved onto a USB flash drive (memory stick). If
more than one configuration is saved, the number does not have to run sequentially, nor does it have to start at 0. For
example, one preset configuration might be saved as 44 and another might be saved as 397.
If the number entered is already in use, the entry screen shown in Figure 78 displays. To overwrite the existing file,
press the Enter key again. If the number was typed in error, press the Escape key on the keypad to cancel the Save.
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Figure 77: Save a USB Preset Entry
Screen
Figure 78: File Exists Error Screen
After successfully entering a preset number and pressing the Enter key, the Options Menu redisplays with one of
two message boxes. If the preset saved successfully, the box shown in Figure 79 displays. It confirms the location
and the name of the folder on the USB flash drive (memory stick). In this example, it is stored as Preset 11. If there
is no flash drive (memory stick) in the USB port on the front panel of the Rack-Mount RDMS™, the message in
Figure 80 displays. Insert the flash drive into the USB port and redo the Save.
Figure 79: Options Menu, USB Saved
Message
Figure 80: Options Menu, USB Error
Message
4.1.5.6 Load a USB Preset
The Load a USB Preset option allows a numbered preset to be loaded from a USB flash drive (memory stick). This
option is similar to the Load Rack Presets option but instead of loading a preset directly from preset list on the RackMount RDMS™, this option allows a preset to be loaded from an external source (a USB flash drive). To load a
single preset from a USB flash drive, select the appropriate option, as shown in Figure 81, then press the Enter key
on the front panel.
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Figure 81: Options Menu, Load a USB Preset Selection
Insert a USB flash drive into the port on the front panel of the Rack-Mount RDMS™.
A dialog screen displays prompting the operator to enter a number between 0 and 999 using the rack’s front panel
numeric keypad, as shown in Figure 82. When the value is entered, press the Enter key on the keypad.
Figure 82: Load a USB Preset Entry Screen
After successfully entering a preset number and pressing the Enter key, the Options Menu redisplays with one of
two message boxes. If the preset loaded successfully, the box shown in Figure 83 displays. It confirms the location
and the name of the folder on the USB flash drive (memory stick). In this example, it is stored as profile 1. If there is
no flash drive (memory stick) in the USB port on the front panel of the Rack-Mount RDMS™, the message in
Figure 84 displays. Insert the flash drive into the USB port and redo the Save.
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Figure 83: Options Menu, USB Loaded
Message
Figure 84: Options Menu, USB Error
Message
4.1.5.7 Status Menu
The Status Menu provides the software version number (e.g. 1.0.4.3), the FPGA version number (e.g. 43000202h),
the firmware version number (e.g. S3 1.0.027), an error count, options for clearing the error count or saving the
errors to an external USB flash drive, and an option allowing software updates via external flash drive. The latter is
particularly useful when debugging receiver issues with the help of Quasonix technical support.
Figure 85: Options Menu, Status Menu Selection
4.1.5.7.1 Save Events
To save the error information externally:
1. Insert a USB flash drive into the USB port on the front panel.
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Figure 86: Status Menu, Save Events – Mem Stick
The Save Events ‘Mem Stick’ parameter message changes to Save Events ‘Ready’ a few seconds after a
valid USB flash drive is inserted.
2. When ‘Ready’ is displayed, select the parameter and press the Enter key on the front panel keypad.
The parameter displays Save Events ‘Finished’ after the error information has successfully been saved.
3. Remove the USB flash drive.
4.1.5.7.2 Application Update
This option allows application software updates to the RDMS™ unit without shutting down, etc.
To update application software externally:
1. Insert the USB flash drive containing the software update into the USB port on the front panel.
Figure 87: Status Menu, App Update – Mem Stick
If a new application is found on the USB flash drive, installation begins immediately. If no update software
is found on the USB flash drive, a Not Found message displays, as shown in Figure 88. Replace the USB
flash drive with one containing the correct application file.
2. Remove the USB flash drive when the installation is complete.
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Figure 88: Status Menu, App Update – Mem Stick - Not Found
4.1.5.8 Network Menu
The Network Menu, which is accessed through the Options Menu, as shown in Figure 89, provides all of the
pertinent networking settings for the rack unit, including:
• DHCP status (DHCP)
• IP address (IP)
• Subnet mask (Subnet)
• Default gateway address (Gateway)
• Set Group Security ID
• Set Rack Alias
Figure 89: Options Menu, Network Menu Selection
Note: Unlike other options, changes made within the Network Menu are not executed until the user clicks on the
Apply New Settings parameter, located just below the Set Rack Alias field, shown in Figure 90. Apply New Settings
does not display unless a change to any of the Ethernet parameters is detected.
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Figure 90: Network Menu, Apply New Settings Displayed
4.1.5.8.1 DHCP
The DHCP option, when enabled, allows for the rack unit to automatically receive an IP address from the local
DHCP server. If DHCP is turned off, then the user must choose a valid IP address for the unit.
Figure 91: Network Menu, DHCP Setting
4.1.5.8.2 IP Address
The IP address for the rack unit will either be assigned to it automatically through the use of DHCP, or it must be
entered by the user. When choosing an IP address, it is critical that the address is unique; otherwise the unit will not
operate within the network properly. It is strongly recommended that the user contact their network administrator to
receive a reserved address for this purpose.
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Figure 92: Network Menu, IP Setting
4.1.5.8.3 Subnet Mask
The subnet mask identifies the portion of the IP address used as a host identifier for the subnet in which the
Quasonix rack unit participates. It is expressed in a quad-dotted decimal representation, just like the unit’s IP
address. The most common subnet mask is 255.255.255.0, which means that the unit’s last 8-bit number (i.e. 0
through 255) uniquely identifies it within its sub-network.
Figure 93: Network Menu, Subnet Setting
4.1.5.8.4 Default Gateway Address
This parameter is currently not used. It is intended for future applications that may require Internet or other gateway
access. Contact your network administrator for the correct gateway address.
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Figure 94: Network Menu, Gateway Setting
4.1.5.8.5 Set Group Security ID
RDMS™ racks may be configured two different ways, depending on the preferred structure. A Group Identifier (ID)
is used to provide a unique name for each RDMS™. In the first configuration, racks may be named based on
department, such as Lab, Development, Production, Demonstration, etc. In the second configuration, racks may be
named for independent users, such as Office1, B4Btest, TestX, etc.
The Set Group Security ID option is located on the Network Menu, as shown in Figure 95. The Group ID can only
be set using this front panel menu.
Figure 95: Network Menu, Set Group Security ID Setting
When the Set Group Security ID option is selected, a Network Menu dialog box displays. If you want this rack to
be publicly accessible, leave this entry blank or clear any previous entry using the Clr button on the front panel of
the rack.
To add a new Group ID, type a name (up to 16 characters A-Z and/or 0-9). The Up and Down arrow buttons are
used to select alpha characters A~Z and the right arrow button is used to advance to the next cursor position. Use the
numeric buttons to add numbers to the Group ID. Press the Enter button to accept changes. Repeat this step to add
or clear additional Group IDs.
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Figure 96: Enter New Group ID
4.1.5.8.6 Set Rack Alias
This optional parameter is used to provide an alternative name to a rack in addition to the IP Address. The default
alias name is RDMS. When using the Multiple RDMS™ Performance Monitor (refer to Section 4.2.4.1), the alias
can be used to quickly identify a particular rack in the displayed list. Examples of a rack alias might be
“RDMSLab1”, “TestLabLevel4”, or “XYZProjectRDMS”.
The Set Rack Alias option is located on the Network Menu, as shown in Figure 97. The Rack Alias may be set using
this front panel menu or via the Remote RDMS™ Client, Network Settings window (refer to section 4.2.5.1).
Figure 97: Network Menu, Set Rack Alias Setting
To add a new rack alias, type a name (up to 16 characters A-Z and/or 0-9). The Up and Down arrow buttons are
used to select alpha characters A~Z and the right arrow button is used to advance to the next cursor position. Use the
numeric buttons to add numbers to the rack alias. Press the Enter button to accept changes. Repeat this step to add
or clear additional rack aliases.
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Figure 98: Enter New Rack Alias
4.1.5.9 LCD Backlight Option
The LCD Backlight option, shown in Figure 99, is used to adjust the lighting on the front panel display screens. This
allows the displays to be easily seen no matter what the lighting conditions in the area where the rack is being used.
To change the LCD Backlight value, select LCD Backlight, then press the Enter key on the front panel.
Figure 99: Options Menu, LCD Backlight Selection
A dialog screen displays, as shown in Figure 100, prompting the operator to enter a new LCD Backlight value using
the rack’s front panel numeric keypad. When the new value is entered, press the Enter key on the keypad.
Figure 100: LCD Backlight Value Entry Screen
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4.1.5.10 Advanced Menu
The Advanced Menu should only be accessed by advanced users. Contact Quasonix customer support before using
these options.
The Advanced Menu, which is accessed via the Main Menu, as shown in Figure 101, provides access to the
following options:
• Sync Measured Bit Rate
• IF Filter
• Video Filter
• Video Scale
• Video Invert
• Video DeEmphasis
• Phase Noise Compensation
• Tape Output
• Tape Frequency
• Muting
• Muting Timeout
• Mod Scaling Menu
• Encoding Menu
• Convolutional Decode
• SNR Estimator
• Factory Default
Figure 101: Main Menu, Advanced Menu
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4.1.5.10.1 Synchronize Measured Bit Rate
Synchronize Measured Bit Rate sets the receiver’s commanded bit rate to the value it is currently measuring on the
input signal. The purpose of this process is to eliminate unintended bit rate offset error so that the receiver can make
full use of its bit synchronizer tracking range, or optionally reduce its tracking range. For the receiver to have an
accurate measurement, however, the input signal must be close enough to the previously commanded bit rate to be
within the current bit synchronizer lock range and actually be locked.
The Sync Measured Bit Rate option is located on the Advanced Menu, as shown in Figure 102. This option may be
set using this front panel menu or via the Remote RDMS™ Client, Advanced Settings window (refer to section
4.2.5.1).
Figure 102: Advanced Menu, Sync Measured Bit Rate Selection
To apply a new measured bit rate, use the value displayed in the entry screen or, type a number using the numeric
buttons. The right arrow button is used to advance to the next cursor position. Allowable value ranges vary
depending on the waveform mode in use. Press the Enter button to accept changes. Repeat this step to apply a
different measured bit rate.
A signal lock must be present for this entry screen to display. If there is no signal lock, the message shown in Figure
104 displays.
Figure 103: Advanced Menu, Measured Bitrate Entry Screen
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If the input signal is not close enough to the previously commanded bit rate to be within the current bit synchronizer
lock range and the signal is not locked, a message box displays, as shown in Figure 104.
Figure 104: Sync Measured Bit Rate Not Valid Message
4.1.5.10.2 IF Filter
The receiver’s integrated IF filter module, shown in Figure 105, includes eight (8) SAW filters, ranging in
bandwidth from 250 kHz to 40 MHz in approximately one-octave steps. The standard eight filters are 250 kHz, 500
kHz, 1 MHz, 2 MHz, 4.5 MHz, 10 MHz, 20 MHz, and 40 MHz. These filters serve as anti-aliasing filters ahead of
the A/D converter in the demodulator itself. In addition, they can provide an added measure of adjacent channel
interference rejection.
Figure 105: 70 MHz IF Module in 2” x 3” Chassis
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The measured responses of the eight filters are shown in Figure 78 and Figure 79 (note the change of horizontal
scale between the two figures).
Six additional filters are available allowing for a total of 14. The optional filters are 70 kHz, 1.4 MHz, 3 MHz, 6
MHz, 14 MHz, and 28 MHz. The measured responses of the optional filters are shown in Figure 80 and Figure 81.
Contact Quasonix for information about the optional filters.
Figure 106: 70 MHz IF Module in 2” x 3” Chassis SAW Filter Responses, Narrow Group (10 MHz Span)
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Figure 107: SAW Filter Responses, Wide Group (Plotted on 100 MHz Span)
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Figure 108: Optional SAW Filter Responses for 70 kHz to 6 MHz
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Figure 109: Optional SAW Filter Responses for 14 MHz and 28 MHz
Based on the receiver’s high level of integration, the proper IF filter is automatically selected based on the current
mode and bit rate settings of the demodulator. Although manual filter selection is available through the Advanced
Terminal window in the RDMS™ client, or via the IF Filter Menu on the front panel LCD, as shown in Figure 110,
manual selection is not recommended. In the case of a receiver with diversity combining enabled, the two
channels must have the same IF filter selected for proper operation.
Figure 110: Front Panel Advanced Menu and IF Filter Menu
4.1.5.10.3 Video Filter
The Video Filter option, available in PCM/FM mode, sets the system bandwidth for the analog signal. Nominally,
NTSC color video is approximately 6 MHz in bandwidth and black and white is 4 MHz. This setting allows the user
to control the cutoff of the video band pass.
Note: Operating the receiver in analog mode is mutually exclusive with operating it as a digital receiver. The bit rate
for the digital receiver and the video filter cannot be set independently of one another.
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The Video Filter option, shown in Figure 111, is used to set the video filter value.
To change the Video Filter setting, select the Video Filter option, then press the Enter key on the front panel.
Figure 111: Advanced Menu, Video Filter Selection
A dialog screen displays prompting the operator to enter a new video filter setting using the rack’s front panel
numeric keypad. The Video Filter Setting Entry screen is shown in Figure 112. When the new value is entered, press
the Enter key on the keypad.
Figure 112: Video Filter Setting Entry Screen
4.1.5.10.4 Video Scale
The Video Scale option sets the peak-to-peak amplitude on the video outputs. By default the video output is 1 V
peak-to-peak using a standard deviated NTSC video signal. This setting allows the user to compensate for a system
where this is not the case.
The Video Scale option, shown in Figure 113, is used to set the video scale value.
To change the Video Scale setting, select the Video Scale option, then press the Enter key on the front panel.
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Figure 113: Advanced Menu, Video Scale Selection
A dialog screen displays prompting the operator to enter a new video scale setting using the rack’s front panel
numeric keypad. The Video Scale Entry screen is shown in Figure 114. When the new value is entered, press the
Enter key on the keypad.
Figure 114: Video Scale Entry Screen
4.1.5.11 Video Invert
In Tier 0 (PCM/FM), the “Q” channel output of the RDMS delivers the demodulated FM output. Enabling the Video
Signal Invert option inverts the FM output.
The Video Invert option, shown in Figure 115, is used to set the video invert value to On or Off.
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Figure 115: Advanced Menu, Video Invert Selection
The user may toggle the Video Invert value by pressing the Enter key on the front panel keypad until the desired
value displays.
4.1.5.12 Video DeEmphasis
The Video DeEmphasis option, shown in Figure 116, is used to set the Video DeEmphasis value to On or Off. This
option should be used when a corresponding video pre-emphasis filter is used on the video transmit side.
Figure 116: Advanced Menu, Video DeEmphasis Selection
The user may toggle the Video DeEmphasis value by pressing the Enter key on the front panel keypad until the
desired value displays.
4.1.5.13 Phase Noise Compensation
The Phase Noise Comp option, shown in Figure 117, is used to set the Phase Noise Compensation value to On or
Off.
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Figure 117: Advanced Menu, Phase Noise Compensation Selection
The user may toggle the Phase Noise Compensation value by pressing the Enter key on the front panel keypad until
the desired value displays.
4.1.5.14 Tape Output
The Tape Output option, shown in Figure 118, is used to set the Tape Output value to On or Off.
Figure 118: Advanced Menu, Tape Output Selection
The user may toggle the Tape Output value by pressing the Enter key on the front panel keypad until the desired
value displays.
The tape output signal appears on the I Out Video output for the corresponding channel. Please refer to section 3.3.1
for a complete description of back panel connectors, including pinouts.
4.1.5.15 Tape Frequency
The Tape Frequency option, shown in Figure 119, is used to enter a tape frequency value (in MHz). The valid
frequency range is 0.000 MHz to 20.000 MHz.
To change the Tape Frequency value, select the Tape Freq option, then press the Enter key on the front panel.
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Figure 119: Advanced Menu, Tape Frequency Selection
A dialog screen displays prompting the operator to enter a new Tape Frequency value using the rack’s front pane l
numeric keypad. The Tape Frequency Value Entry screen is shown in Figure 120. When the new value is entered,
press the Enter key on the keypad.
Figure 120: Tape Frequency Value Entry Screen
4.1.5.16 Muting
The Muting option, shown in Figure 121, is used to set the muting value to On or Off. When the Muting option is set
to On, the receiver stops sending clock and data information when the timeout value is reached. This option is
beneficial to someone using a recorder with limited space. For example, if data is not locked to a valid signal or is
outside the valid range, the information is muted (stopped) so the recorder is not filled with bad data.
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Figure 121: Advanced Menu, Muting Selection
The user may toggle the Muting value On or Off by pressing the Enter key on the front panel keypad until the
desired value displays.
4.1.5.17 Muting Timeout
The Muting Timeout option, shown in Figure 122 is used to set a timeout value (in milliseconds). This setting is
used to determine when to mute (stop sending data) when the Muting option is set to On.
Figure 122: Advanced Menu, Muting Timeout Selection
A dialog screen displays prompting the operator to enter a new Muting Timeout value (in milliseconds) using the
rack’s front panel numeric keypad. The valid range is 0 to 46016 milliseconds. The Muting Timeout Entry screen is
shown in Figure 123. When the new value is entered, press the Enter key on the keypad.
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Figure 123: Muting Timeout Entry Screen
4.1.5.18 Modulation Scaling Menu
Access the Mod Scaling menu from the Advanced Menu. Select ‘Mod Scaling Menu’, as shown in Figure 124, then
press the Enter key on the front panel keypad.
Figure 124: Advanced Menu, Mod Scaling Menu Selection
The Mod Scaling menu includes the following parameters:
• Mod Scale Index
• Hold Threshold (in dB)
4.1.5.18.1 Mod Scale Index
The Mod Scale Index option allows the operator to manually set the modulation scale index. This enables the
receiver to operate at the optimum range of modulation desired by the user.
When modulation scale index is set (via the Mod Scaling Menu, Mod Scale Index option, shown in Figure 125), the
Modulation Scaling option (on the front panel Main Menu) is simultaneously changed to Locked. The Locked
notation includes the new index number that the operator has chosen (shown in Figure 37).
If the Locked index number is to be retained following a power-off cycle of the rack, then turn on Mod Persist from
the Main Menu. Refer to section 4.1.4.11, Modulation Persistence.
To change the Modulation Scale Index, select Mod Scale Index, then press the Enter key on the front panel.
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Figure 125: Mod Scaling Menu, Mod Scale Index Selection
A dialog screen displays prompting the operator to enter a new modulation scale index using the rack’s front panel
numeric keypad. The Index Entry screen is shown in Figure 126. When the new value is entered, press the Enter key
on the keypad.
Figure 126: Modulation Scale Index Entry Screen
To clear any locked modulation scale index number, go to the Main Menu and toggle the Mod Scaling option back
to Tracking. After Mod Scaling is set to Tracking, the modulation index follows the receiver's present estimate of
the mod index.
4.1.5.18.2 Hold Threshold
When Mod Scaling is in Tracking mode, the modulation index estimate becomes poorer as the signal-to-noise ratio
(SNR) decreases (that is, as the received signal gets weak). This in turn negatively impacts demodulation
performance, making bit errors more likely than they would be if the modulation index were known a priori. The
purpose of the Hold Threshold is to set an SNR level (technically Eb/N0* level) below which the modulation index
estimate will hold rather than track, so it does not get perturbed by noise.
• Eb/N0 is the ratio of signal energy per bit (Eb) to noise energy spectral density (N0), which is sometimes
referred to as “SNR per bit”.
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Figure 127: Mod Scaling Menu, Hold Threshold Selection
A dialog screen displays prompting the operator to enter a new modulation scale hold threshold using the rack’s
front panel numeric keypad. The Mod Scale Hold Threshold Entry screen is shown in Figure 128. The allowable
range is -20.000 to +30.000. When the new value is entered, press the Enter key on the keypad.
Figure 128: Modulation Scaling Hold Threshold Entry Screen
4.1.5.19 Encoding Menu
Access the Encoding menu from the Advanced Menu. Select ‘Encoding Menu’, shown in Figure 129, then press the
Enter key on the front panel keypad.
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Figure 129: Advanced Menu, Encoding Menu Selection
The Encoding menu includes the following parameters:
• Encoding
• Spectrum (On/Off)
• Bi-Phase (On/Off)
4.1.5.19.1 Encoding
The Encoding option is used to set the non-return to zero (NRZ) value used by the receiver. NRZ is a way of
encoding binary data on a physical signal. The options are:
• NRZ-L – Non-return to zero Level
• NRZ-M – Non-return to zero Mark (1)
• NRZ-S – Non-return to zero Space
The user may scroll through the Encoding options by pressing the Enter key on the front panel keypad until the
desired value displays.
Figure 130: Encoding Menu, Encoding Selection
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4.1.5.19.2 Spectrum Inversion
The Spectrum Inversion option inverts the frequencies processed by the demodulator relative to how they appear at
the IF Output port. That is, low frequencies within the IF Filter bandwidth become high frequencies within the
demodulator and vice versa. This can be used to compensate for a frequency inversion elsewhere in the system.
Figure 131: Encoding Menu, Spectrum Selection
The user may toggle the Spectrum Inversion value by pressing the Enter key on the front panel keypad until the
desired value (On or Off) displays.
4.1.5.19.3 Bi-Phase
Bi-Phase encoding enables the demodulator to process Bi-Phase encoded data (as opposed to NRZ encoded data)
per IRIG 106 Chapter 4.
Figure 132: Encoding Menu, Bi-Phase Selection
The user may toggle the Bi-Phase value by pressing the Enter key on the front panel keypad until the desired value
(On or Off) displays.
4.1.5.20 DC Antenna
The DC Antenna option is only available when using the 5-band downconverter AND P and C bands are enabled.
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The user may toggle the DC Antenna value On or Off by pressing the Enter key on the front panel keypad until the
desired value displays.
• When the downconverting antenna is not available, this command displays only an assumed value.
• The downconverting antenna setting only applies to C band frequencies.
Figure 133: Advanced Menu, DC Antenna Selection
The downconverting antenna has an LO that is used to downconvert C band signals (4400 MHz – 5150 MHz) to a
lower frequency range known as P band (400 MHz – 1150 MHz) using an LO frequency of 5550 MHz. This results
in two issues that are addressed by the downconverting antenna control.
1. Spectral Inversion
In a downconverting antenna, the LO is higher than the RF (high side injection) and the lower side
band result is selected—the spectrum is inverted. All C to P band downconverting antennas are
assumed to produce a spectrally inverted signal. The receiver automatically reinverts the signal before
it is demodulated. (This is done in the downconversion to 70 MHz IF.) If an actual P band signal is
received, it is NOT spectrally inverted and the automatic reinversion done by the receiver improperly
causes the signal to appear inverted to the demodulator.
The demodulator has a mechanism to invert the spectrum in the digital domain. The downconverting
antenna setting determines how the spectral inversion is handled for P band signals.
2. C Band Frequency Specification Ambiguity
It is common to tune to the C to P band downconverted signal by specifying the C band frequency. In a
receiver that also has actual C band receiver capability, an ambiguity develops when a C band
frequency is specified since it can be applied to either a C or P band signal. The downconverting
antenna setting determines how a specified C band frequency is interpreted in a system where both C
and P bands are enabled.
If a C band frequency is specified and the downconverting antenna is enabled, it is assumed the signal
is a C to P downconverted signal. The receiver is tuned to the P band equivalent and the automatic
inversion is used. If the downconverting antenna is disabled, the receiver is tuned to the specified C
band frequency and spectral inversion is not an issue.
If a P band frequency is specified, it is assumed there is no downconverting antenna. If there is a
downconverting antenna, it is ignored. The receiver is tuned to the actual P band frequency and the
automatic spectral inversion is disabled.
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4.1.5.21 Convolutional Decode
The Convolutional Decoder (also commonly referred to as the Viterbi Decoder) is available in PCM/FM and legacy
PSK modes. Its purpose is to decode data that has been encoded per “Consultative Committee for Space Data
Systems, Recommendation for Space Data System Standards, TM Synchronization and Channel Coding, CCSDS
131.0-B-1, Blue Book,” September 2003, Section 3.
Convolutional encoding adds redundant information to the transmitted data stream. The Convolutional Decoder uses
this information to detect and correct bit errors that may occur, particularly due to predominantly Gaussian noise.
The encoded data rate is twice the specified data rate, and the occupied bandwidth is also doubled.
For legacy PSK modes that use quadrature modulation (e.g., OQPSK), there are actually two independent decoders,
one for in-phase (“I”) data and one for quadrature (“Q”) data. This approach assumes a similar arrangement for the
encoders in the transmitter, which is true of all Quasonix transmitters.
The user may toggle the Convolutional Decoding value On or Off by pressing the Enter key on the front panel
keypad until the desired value displays.
Figure 134: Advanced Menu, Convolutional Decode Selection
4.1.5.22 SNR Estimator
The SNR Estimator menu is available for all waveform modes. SNR estimation is used primarily to achieve proper
channel weighting by the optimal ratio pre-detection diversity combiner. There are two algorithms available to
estimate SNR: DSP and AGC. Under normal conditions, with proper AGC zeroing, these two algorithms give
substantially similar results.
The user may toggle the SNR Estimator value to AGC or DSP by pressing the Enter key on the front panel keypad
until the desired value displays.
The DSP-based SNR estimator numerically measures received power relative to noise power at the demodulator
input, assuming the signal power is attributable to constant-envelope modulation and the noise power is attributable
to additive white Gaussian noise. This measurement is very accurate when the SNR is below 30 dB, but it will rarely
report a value above this (no matter how strong the signal). This selection is recommended for ARTM modulation
types (Tier 0, I, and II) or when an accurate AGC zeroing process is not feasible.
The AGC-based SNR estimator measures received power relative to the AGC zero point (i.e., noise floor). This
estimation is insensitive to modulation and does not distinguish between intended signal and interfering signal. This
selection is recommended for unknown signals or for signals with modulation that is not constant-envelope (for
example, unshaped PSK). This method is also recommended when the received signals may be more than 30 dB
above the noise floor. However, an accurate AGC zeroing process is required for accurate results.
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Figure 135: Advanced Menu, SNR Estimator Selection, AGC and DSP
4.1.5.23 Factory Default
The Factory Default option allows the user to reset each channel of the Rack-Mount Demodulator/Receivers to the
factory default settings. Factory Default reset does not affect Ethernet settings.
Figure 136: Advanced Menu, Factory Default Selection
4.2 Remote RDMS™ Client (RRC) Control
RRC provides the user with full configuration, control, and monitoring capabilities for one or multiple rack-mount
receivers. For configuration management purposes, only one client can configure a receiver at a given time.
However, multiple clients can monitor an individual receiver’s status at once.
The client’s monitoring capabilities include:
• Receiver settings
• Signal strength
• Signal quality
• Signal lock detect
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• Combiner link status (optional Diversity Combiner feature required)
• Constellation / eye pattern display
• Client status
Figure 137 shows the client with a control window and two monitoring windows open.
The Remote RDMS™ Client consists of a tool bar at the top of the window, Selected RDMS Unit and Connect
screen button at the top right, and the Basic RDMS Settings window which displays a variety of parameters for each
available channel.
Figure 137: Remote RDMS™ Client in Desktop Window
Whenever there is activity in progress that cause network communications to be temporarily busy, a “Please Wait”
message displays at the top of the Settings window. An example is shown in Figure 138.
Figure 138: Please Wait Message
4.2.1 Considerations for Running Multiple GUI Clients on a Single Computer
When running multiple GUI clients on the same computer, the following cautions should be taken.
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• It is possible for an actively selected rack in one GUI instance to be selected more than once for other
active GUI instances on the same computer. If this is done, the active GUI instance will be the only GUI to
have graphic waveforms and accurate values.
It is recommended that the same rack NOT be selected more than once when more than one GUI is running
on the same computer.
• Caution should be taken when turning off an RDMS rack from the File menu when more than one instance
of the RDMS GUI is running from a single computer. The RDMS GUI that shuts down the RDMS rack
unit knows that this RDMS rack is shut down and no longer available, however, the remaining GUI
instances will take up to three (3) minutes to see that the RDMS unit is missing.
Selecting the missing RDMS rack from the other instances of the GUI may cause that GUI to wait for an
extended period of time trying to connect. This is by design to prevent unwanted dropouts of RDMS racks
on the GUI client under poor Ethernet conditions (WiFi or Wired).
4.2.2 Selecting an RDMS™ Unit
Upon opening, the Remote RDMS™ Client queries the client’s network to compile a list of rack-mount RDMS™
receivers present. The following message displays in the main window upon client initialization:
Figure 139: Searching for RDMS Units Message
After the list has been compiled, the user can select a unit to control by clicking on the down arrow in the Selected
RDMS Unit menu in the upper right-hand corner of the main application window. Each unit within the network is
displayed by its IP address, and alias name, if previously assigned, as shown in Figure 140.
Figure 140: Selected RDMS Unit
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After making a selection from the Selected RDMS Unit dropdown list, click on the Connect screen button to make a
communications connection to the chosen RDMS™.
Figure 141: Selected RDMS Unit and Connect Screen Button
The Remote RDMS™ Client displays a message notifying the requestor that a connection attempt is being made, as
shown in Figure 142.
Figure 142: Connecting to RDMS™ Unit
Additionally, the receiver’s menu LCDs will briefly show a connection image, as shown in Figure 143, to alert the
operator that it is now being controlled remotely.
Figure 143: RDMS™ Connected Image
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4.2.3 Remote Control Menu
The Remote Control menu provides two options: Basic Settings and Advanced Terminal, as shown in Figure 144.
The Basic RDMS Settings window can be accessed at any time by navigating to the Main Menu and selecting:
Remote Control > Basic Settings.
Figure 144: Remote Control Menu
4.2.3.1 Basic Settings
The Basic RDMS Settings screen is shown in Figure 145. The Remote RDMS™ Client automatically connects to
the rack that was selected from the Selected RDMS Unit dropdown list (Figure 140 ).
Figure 145: Basic RDMS Settings Window
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Two screen tabs are available on the Basic RDMS Settings screen: Basic Settings tab and Advanced Settings tab.
4.2.3.1.1 Basic Settings Tab
The Basic Settings tab provides the user with:
• Channel selection
• Basic receiver settings, such as frequency, mode, bit rate
• Filter Settings
• Screen buttons for initiating or cancelling actions
• Signal indicators, including lock detect, signal strength, signal quality, combiner link status
4.2.3.1.1.1 Channel Selection
The user may access either channel display by clicking on any field. The Remote Client automatically switches to
the correct channel.
If the user is operating a single-channel receiver, only Channel 1 displays, as shown in Figure 146.
Figure 146: Basic RDMS Settings, Only One Channel Available
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4.2.3.1.1.2 On-screen Buttons
The Basic Settings tab contains three on-screen buttons used to initiate or cancel various actions. These buttons
(shown in Figure 147) are:
• Apply Settings
• Refresh Settings
• Exit
Figure 147: On-Screen Buttons
The Apply Settings screen button changes color from white to flashing green to alert the user that one or more
changes have been detected. To save the changes, the user must click on the Apply Settings screen button.
Fields with checkboxes are exceptions to this procedure. When the user clicks on a checkbox to activate the field,
the parameter is automatically updated.
The Refresh Settings screen button is used to clear changes without applying/saving them. The field values revert
back to the last applied values. For example, if the mode was PCMFM when the user opened the client and the user
changed the mode to SOQPSK, but decided to continue using PCMFM, the user would click on Refresh Settings
and the mode would revert back to PCMFM.
The Exit screen button is used to close the Basic RDMS Settings Window without making any changes. The Client
Application (containing the Menu bar) remains open.
4.2.3.1.1.3 Basic Settings Window
Directly below the client application status indicator is the Basic Settings window, shown in Figure 148.
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Figure 148: Basic Settings Window
The Basic Settings window includes all of the primary settings related to the receiver, including Frequency, Mode,
Bit Rate, Data and Clock Polarity, and Derandomizer On, and an AGC Zero button. The Modulation Scaling option
is only available with PCM/FM mode.
Modulation Scaling contains four settings: Tracking, Locked, Off, and Acquire. Modulation Scaling is a method
used to retain the maximum trellis-coding gain of a non-ideal FM signal.
The Mode and Modulation Scaling settings can be adjusted by clicking on a dropdown menu and making a
selection, while others require the user to enter specific values, such as bit rate and frequency settings, or to select a
checkbox. The Mode selections are shown in Figure 149. The Modulation Scaling settings are shown in Figure 150.
Figure 149: Basic Settings Window, Mode Menu
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Figure 150: Basic Settings Window, Modulation Scaling Menu
When Modulation Scaling is set to Tracking, the graphs display in red, as shown in Figure 151.
Figure 151: Modulation Scaling Set to Tracking, Signal Graph Displays Red
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When the RDMS™ is powered on, the default setting is Tracking, unless the unit was powered off from a preset
condition. If the unit was powered off from an unmodified preset setting, then the default condition of Modulation
Scaling is as defined in the preset. When Tracking is set, the modulation scale index is actively being tracked.
Note: The active setting is not saved when the rack is powered off, unless the Modulation Persistence option was set
to On.
Frequency, mode, and bit rate changes, or any changes to a preset, cause the Modulation Scaling setting to revert
back to Tracking. This is because the optimal signal monitoring is no longer valid.
If there are two channels, and the Combiner is set to On, the Modulation Scaling is NOT linked. Modulation Scaling
for channel one and channel two functions independently.
Note: Whenever the Diversity Combiner is On, any changes made to the Frequency option (even with Frequency
Diversity On enabled) causes Modulation Scaling for both channels to be set to Tracking.
When the RDMS™ has a good lock on the target transmitter, Modulation Scaling should be set to Locked.
When Modulation Scaling is set to Locked or Off, the graphs display in green, as shown in Figure 152. This
indicates the optimal Modulation Index is set. For more information about the Modulation Index, refer to section
4.2.3.1.2.2, Scale Settings Window.
Figure 152: Modulation Scaling Set to Locked, Signal Graph Displays Green
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