User Manual DDS200 Digital Demodulation System 070-9952-00

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Remote Control 3. Press any key on the front panel to return to manual control. Then press the[LOCAL] softkey.Switching to Remote ControlOn power up, the DDS200 is always in the manual control mode (LOCAL state)and can be operated from the front panel. Switch over to remote control(REMOTE state) happens as soon as the DDS200 receives an addressedcommand from a controller. In the remote-control mode, operation from the frontpanel is inhibited. The DDS200 remains in the REMOTE state until it isswitched back to the manual control mode, either from the front panel or via theIEC/IEEE bus (see Return to Manual Control page 3–3). Switch over from themanual mode to remote control and vice versa has no effect on the instrumentsettings.Setting the DeviceAddressThe factory-set IEC/IEEE-bus address is 6. The address can be changedmanually in the SETUP \ REMOTE \ IEC625-IEEE488 menu (refer to SETUPMenu on page 2–19). Addresses between 0 and 30 can be selected.Manually:1. Select the SETUP \ REMOTE \ IEC625-IEEE488 menu.2. Enter the desired address.3. Terminate the address entry with [1x ENTER] key.Displays in RemoteControlThe remote-control status is indicated by the REM and LLO LEDs on theSTATE signal field. In this status, all readouts appear on the screen.3–2 DDS200 Digital Demodulation System User Manual
Remote ControlReturn to Manual ControlReturn to manual control can be made via the front panel or via the IEC/IEEEbus.Manually:1. Press any key on the front panel. Then actuate the [LOCAL] softkey.NOTE. Prior to the switch over, the commands must have been fully processed, sinceremote control is immediately switched on again.The return to LOCAL key can be locked by the universal command LLO (see AppendixA) in order to prevent inadvertent switch over. It is then only possible to switch tomanual control via the IEC/IEEE bus.Locking of the [LOCAL] key can be cancelled by deactivating the “REN” line of theIEC/IEEE bus (refer to Appendix A: IEC/IEEE-Bus Interface).Via IEC/IEEE bus: DDS200 Digital Demodulation System User Manual 3–3
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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
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Manual OperationSample SettingThis
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Manual OperationFigure 2-3: MODE me
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Manual OperationPress the RECEIVER
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Manual OperationBasic OperationThe
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Manual OperationFigure 2-7: MEASURE
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Manual OperationSoft KeysThe soft k
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Manual OperationNumeric KeypadSelec
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Manual OperationPresetting the Unit
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Manual OperationFigure 2-14: RECALL
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Manual OperationThe display mode do
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Manual OperationFigure 2-18: SETUP:
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Manual OperationThe type of printer
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Manual OperationOperation as Demodu
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Manual OperationFigure 2-24: INPUT:
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Manual OperationFigure 2-26: STO: E
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Manual Operation84QAM16QAM32QAM64QA
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Manual OperationSPECIAL FUNCTION Me
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Manual OperationA wide loop bandwid
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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 and 90: Manual OperationConstellation Diagr
Page 91 and 92: Manual OperationFigure 2-42 shows a
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 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
Page 140 and 141: Remote ControlParameter:In the para
Page 142 and 143: Remote Control*CLS*ESE 0 to 255*ESR
Page 144 and 145: Remote ControlInstrument Model and
Page 146 and 147: Remote ControlOutput UnitThe output
Page 148 and 149: Remote ControlCONDition register. T
Page 150 and 151: Remote ControlOverview of StatusReg
Page 152 and 153: Remote ControlTable 3-2: Definition
Page 154 and 155: Remote ControlTable 3-5: Definition
Page 156: Remote ControlResetting the StatusR
Page 159 and 160: Maintenance and TroubleshootingRepl
Page 161: Maintenance and TroubleshootingTabl
Page 164 and 165: Appendix A: SpecificationsTable A-1
Page 166 and 167: Appendix A: SpecificationsTable A-2
Page 168 and 169: Appendix A: SpecificationsA-6 DDS20
Page 170 and 171: Appendix B: IEC/IEEE-Bus InterfaceS
Page 172 and 173: Appendix B: IEC/IEEE-Bus InterfaceT
Page 174 and 175: 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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User Manual DDS200 Digital Demodulation System 070-9952-00

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