User Manual DDS200 Digital Demodulation System 070-9952-00

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Preparation for UseInstalling OptionsVarious options (hardware modules) are available to expand the DDS200.Detailed instructions describing the installation steps are enclosed with eachoption. The options can be inserted in the guide rails from the rear afterremoving the covers (top and bottom) and the rear panel.Proceed as follows:1. Power off the unit, and disconnect all external connections, especially theAC supply connector.2. Remove rear blue feet (two screws each).3. Push the covers (top and bottom) to the rear, and remove them.4. Remove the four Phillips screws at the left and right on the side.5. Fold down the rear panel assembly.6. Install the option according to the instructions that are packaged with it.7. Reassemble the unit in reverse order.8. Do a software update, if necessary (see page 1–13).9. Perform a test according to the enclosed instructions and the functional testdescribed in Functional Test on page 1–15.Installing a printerThe DDS200 has a Centronics printr interface connector (X32) on the rear panel.The 25-pin, D-type, female connector is PC-compatible. The type of printr canbe selected in the setup menu (refer to printr Menu – Selecting the Type ofprintrs on page 2–23). The HARDCOPY key makes a print-out of the currentdisplay. Commercial PC printr cables can be used for connecting the DDS200 tothe printr.Serial InterfaceThe unit is provided with a serial RS232 interface connector (X33) on the rearpanel. Via this interface, the unit can be remote-controlled from a PC. Afirmware update can also be carried out via the RS232 interface. For detailedinformation about configuring the interface, refer to RS232 Menu – Setting theRS232-Interface Parameters on page 2–22. The remote command set isexplained in Remote Control and in Appendix B: IEC/IEEE-Bus Interface. Athree-core shielded cable with crossed transmit and receive lines is sufficient forremote control; for updating the firmware, a null modem cable is required.1–16 DDS200 Digital Demodulation System User Manual
Preparation for UseIEC/IEEE-Bus ConnectorThe DDS200 can be connected to the IEC/IEEE bus by means of connector X29on the rear panel and remote-controlled. The bus address can be set in the setupmenu (refer to IEC-IEEE488 Menu — Setting the IEC/IEEE-Bus Address onpage 2–21). The set of remote-control commands is described in Remote Controland in Appendix B: IEC/IEEE-Bus Interface. The interface meets the requirementsof standards IEC-625-2 and IEEE 488.2.A shielded cable PK can be ordered as an accessory using the following partnumbers:Length (m)Order No.0.5 292.2013.051 292.2013.102 292.2013.204 292.2013.40DDS200 Digital Demodulation System User Manual 1–17
Page 1 and 2: ®Established 1981Advanced Test Equ
Page 3 and 4: Copyright Tektronix, Inc. All righ
Page 7 and 8: Table of ContentsRemote ControlHard
Page 9 and 10: Table of ContentsIndexLocal control
Page 11 and 12: Table of ContentsFigure 2-35: ALARM
Page 13 and 14: Table of ContentsList of TablesTabl
Page 15 and 16: Table of ContentsxDDS200 Digital De
Page 17 and 18: General Safety SummaryProvide Prope
Page 19: PrefacexivDDS200 Digital Demodulati
Page 22 and 23: Preparation for UseFront PanelFront
Page 24 and 25: Preparation for UseTable 1-1: Legen
Page 26 and 27: Preparation for UseTable 1-2: Legen
Page 28 and 29: Preparation for UseUnpacking the Un
Page 30 and 31: Preparation for UsePositioning the
Page 32 and 33: Preparation for UsePowering OnConne
Page 34 and 35: Preparation for UseInitial update -
Page 38: 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
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Manual OperationFor further informa
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Manual OperationConstellation Diagr
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Manual OperationFigure 2-42 shows a
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Manual OperationQAM Parameters. Whe
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Manual OperationNOTE. For reading o
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Manual OperationPreset Values and M
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Manual OperationTable 2-4: DDS200 P
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Manual OperationExamples of Applica
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Manual OperationFigure 2-48: Conste
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Manual OperationThe magnitude of th
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Manual OperationFigure 2-53: Conste
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Manual OperationFrequency of occurr
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Manual OperationFrom the standard d
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Manual OperationTable 2-5: Theoreti
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Manual OperationThe term “modulat
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Manual OperationAmplitude N = 2 4 -
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Manual OperationBER Measurement wit
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Manual Operationare taken into acco
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Manual OperationIt should be noted
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Manual OperationThe key characteris
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Manual OperationThe key characteris
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Remote Control
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Remote ControlIEC/IEEE-Bus Messages
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Remote ControlCommon commands. Comm
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Remote ControlNumeric suffix:If an
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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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User Manual DDS200 Digital Demodulation System 070-9952-00

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