User Manual DDS200 Digital Demodulation System 070-9952-00

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Manual OperationFigure 2–40: QAM signal with unsynchronized carrier and symbol rateFigure 2–41 shows a 64QAM signal with synchronized symbol clock rate.However, the constellation diagram rotates about its center because the carrier isnot synchronized (CARRIER RECOVERY). This may happen, for instance,when the set frequency is not correct.Figure 2–41: QAM signal with unsynchronized carrierDDS200 Digital Demodulation System User Manual 2–51
Manual OperationFigure 2–42 shows a constellation diagram with correct synchronization.Figure 2–42: Correctly synchronized 64QAM signalFigure 2–43 shows the CONSTELLATION DIAGRAM menu.Figure 2–43: MEASURE: CONSTELLATION DIAGRAM menuFor further examples and a description of individual errors parameters, refrer toApplication and Interpretation of Constellation Diagram on page 2–62.2–52 DDS200 Digital Demodulation System User Manual
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®Established 1981Advanced Test Equ
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Copyright Tektronix, Inc. All righ
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Table of ContentsRemote ControlHard
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Table of ContentsIndexLocal control
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Table of ContentsFigure 2-35: ALARM
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Table of ContentsList of TablesTabl
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Table of ContentsxDDS200 Digital De
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General Safety SummaryProvide Prope
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PrefacexivDDS200 Digital Demodulati
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Preparation for UseFront PanelFront
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Preparation for UseTable 1-1: Legen
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Preparation for UseTable 1-2: Legen
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Preparation for UseUnpacking the Un
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Preparation for UsePositioning the
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Preparation for UsePowering OnConne
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Preparation for UseInitial update -
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Preparation for UseInstalling Optio
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Preparation for Use1-18 DDS200 Digi
Page 41 and 42: Manual OperationSample SettingThis
Page 43 and 44: Manual OperationFigure 2-3: MODE me
Page 45 and 46: Manual OperationPress the RECEIVER
Page 47 and 48: Manual OperationBasic OperationThe
Page 49 and 50: Manual OperationFigure 2-7: MEASURE
Page 51 and 52: Manual OperationSoft KeysThe soft k
Page 53 and 54: Manual OperationNumeric KeypadSelec
Page 55 and 56: Manual OperationPresetting the Unit
Page 57 and 58: Manual OperationFigure 2-14: RECALL
Page 59 and 60: Manual OperationThe display mode do
Page 61 and 62: Manual OperationFigure 2-18: SETUP:
Page 63 and 64: Manual OperationThe type of printer
Page 65 and 66: Manual OperationOperation as Demodu
Page 67 and 68: Manual OperationFigure 2-24: INPUT:
Page 69 and 70: Manual OperationFigure 2-26: STO: E
Page 71 and 72: Manual Operation84QAM16QAM32QAM64QA
Page 73 and 74: Manual OperationSPECIAL FUNCTION Me
Page 75 and 76: Manual OperationA wide loop bandwid
Page 77 and 78: Manual OperationALARM MenuThis subs
Page 79 and 80: Manual OperationPressing the ALARM
Page 81 and 82: Manual OperationFigure 2-34: ALARM:
Page 83 and 84: Manual OperationThe alarm register
Page 85 and 86: Manual OperationMEASURE MenuThe DDS
Page 87 and 88: Manual OperationFor further informa
Page 89: Manual OperationConstellation Diagr
Page 93 and 94: Manual OperationQAM Parameters. Whe
Page 95 and 96: Manual OperationNOTE. For reading o
Page 97 and 98: Manual OperationPreset Values and M
Page 99 and 100: Manual OperationTable 2-4: DDS200 P
Page 101 and 102: Manual OperationExamples of Applica
Page 103 and 104: Manual OperationFigure 2-48: Conste
Page 105 and 106: Manual OperationThe magnitude of th
Page 107 and 108: Manual OperationFigure 2-53: Conste
Page 109 and 110: Manual OperationFrequency of occurr
Page 111 and 112: Manual OperationFrom the standard d
Page 113 and 114: Manual OperationTable 2-5: Theoreti
Page 115 and 116: Manual OperationThe term “modulat
Page 117 and 118: Manual OperationAmplitude N = 2 4 -
Page 119 and 120: Manual OperationBER Measurement wit
Page 121 and 122: Manual Operationare taken into acco
Page 123 and 124: Manual OperationIt should be noted
Page 125 and 126: Manual OperationThe key characteris
Page 127: Manual OperationThe key characteris
Page 130 and 131: Remote Control
Page 132 and 133: Remote ControlIEC/IEEE-Bus Messages
Page 134 and 135: Remote ControlCommon commands. Comm
Page 136 and 137: Remote ControlNumeric suffix:If an
Page 138 and 139: Remote ControlExample: Special n
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Remote ControlParameter:In the para
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Remote Control*CLS*ESE 0 to 255*ESR
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Remote ControlInstrument Model and
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Remote ControlOutput UnitThe output
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Remote ControlCONDition register. T
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Remote ControlOverview of StatusReg
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Remote ControlTable 3-2: Definition
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Remote ControlTable 3-5: Definition
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Remote ControlResetting the StatusR
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Maintenance and TroubleshootingRepl
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Maintenance and TroubleshootingTabl
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Appendix A: SpecificationsTable A-1
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Appendix A: SpecificationsTable A-2
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Appendix A: SpecificationsA-6 DDS20
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Appendix B: IEC/IEEE-Bus InterfaceS
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Appendix B: IEC/IEEE-Bus InterfaceT
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Appendix C: List of Error MessagesT
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Appendix C: List of Error MessagesD
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Appendix D: List of CommandsSTATus
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Appendix D: List of CommandsSYSTem
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Appendix D: List of CommandsINPut S
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Appendix D: List of CommandsTable D
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Appendix D: List of CommandsREAD Su
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Appendix D: List of CommandsD-20 DD
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Appendix E: Programming ExamplesSen
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Appendix E: Programming ExamplesSer
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Appendix E: Programming Examples
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Appendix F: Remote Control via RS-2
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IndexHHandshake, RS232, F-5Hard key
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IndexSetting device address, 3-2Set
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