Agilent Technologies 5988-7401EN manual Start Mode, Trigger Out

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Combining Parameters for Signal Generation

Using the Agilent 81133A/81134A Pulse Generator

Start Mode

When the Ext. Input start mode is selected, the instrument sends the generated signal to the outputs according to the signal applied at the Start In connector.

You can define the following parameters that the external signal must meet:

•Threshold (voltage)

•Termination voltage

•Edge (rising/falling)

If you select the Ext. Input mode, the instrument automatically switches in armed mode. This means, the instrument waits for the selected edge to appear.

The further behavior of the instrument depends on the selected instrument mode:

•In Burst Mode:

As soon as the selected signal appears at the input, the armed mode is deactivated (the instrument sends one burst and then stops).

•In Pulse/Pattern and Repetitive Burst Mode:

The instrument stays in armed mode (it sends the pattern/burst every time the selected signal appears). The trigger output frequency is calculated by dividing the instrument frequency by the length of the data pattern.

Trigger Out

The trigger output can be set to one of the following modes:

•Trigger on pulse

The trigger output is generated according to the instrument frequency. It can optionally be divided by 1 up to 2 31 - 1 optionally.

•Trigger on data

One trigger pulse is generated on every start of the repetitive data pattern. The trigger output frequency is calculated by dividing the instrument frequency by the length of the data pattern.

Agilent 81133A/81134A Pulse Generator User’s Guide, January 2005

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Contents Agilent 81133A/81134A Pulse Generator Revision Important NoticeContents Setting Up the 81134A by Using the Graphical User Interface Setting Up Generic and Advanced SignalsUpdating the Firmware Troubleshooting Index Contents Environmental Conditions Safety SummaryDo not Operate in an Explosive Atmosphere Before Applying PowerSafety Requirements Ground the InstrumentInitial Inspection Initial InspectionPower Requirements Performance RequirementsVentilation Requirements Cleaning Recommendation Cleaning RecommendationDeclaration of Conformity Declaration of ConformityIntroduction to the Agilent 81133A/81134A Pulse Generator Introduction to the Agilent 81133A/81134A Pulse Generator Benefits and Key FeaturesInterface Keys Tab Keys to navigate Front Panel OverviewFront Panel Overview Graphical User Softkeys NumericGlobal Inputs Outputs Channel Inputs Input and OutputsDescription Rear Panel Overview Operating the Agilent 81133A/81134A Pulse Generator Channel Navigation through the PagesOperating the Agilent 81133A/81134A Pulse Generator MainHow to Navigate through the Parameters at one How to Select a Parameter from a Selection ListPress the navigation knob to open the selection list How to Change a Number Field How to Change a Number FieldPress Modify Values Fine-TuningChanging Single Digits Operating the Agilent 81133A/81134A Pulse Generator Setting Up Generic and Advanced Signals Setting Up Generic and Advanced Signals Setting Up a Clock SignalSetting Up a Clock Signal Using the Graphical User InterfaceNormal Out Channel Set the Freq. Divider to Frequency Divider Indicator Setting Up Generic and Advanced Signals Following code performs the same task Using the Remote Programming InterfacesSetting Up a Pulse Signal Pattern Mode Width Levels Setting Up a Pulse SignalTrigger Mode Generate the Signals //reconnect channels Setting Up a Data Pattern Setting Up a Data Pattern Prbs Polynome Signal Mode Pattern ModeECL Levels Switch to the Numeric Edit Mode Pulse Type NRZ Pattern Mode Data ECL LevelsData pattern for channel Numeric Edit Mode Trigger Mode Set up the trigger Set trigger mode to data OUTP0SOUR Bits Width = 100 ps Setting Up a Burst SignalDelay = 50 ps Period = 500 ps Arming SourceSetting Up a Burst Signal InstrumentMode Timing Parameter Data pattern for channel Graphic Edit ModeTrigger Output Aux page now looks as follows Following code performs the same tasks Burst Length = 4 x Data Length Setting Up a Repetitive Burst SignalInstrument Burst Repetition Specifies Mode Setting Up a Repetitive Burst SignalData Settings for the Pattern Signal To set the data pattern Setting Up a Repetitive Burst Signal Setting Up Generic and Advanced Signals Prepare the trigger Set trigger mode to Data OUTP0SOUR Bits Setting Up Signals for a Stressed Eye Diagram Measurement Connecting the Instruments Setting Up Signals for a Stressed Eye Diagram Measurement86100 DCA 50 % Setting Up the 81134A by Using Graphical User InterfaceChannel page now looks as follows Enable the trigger output Viewing the Eye Diagram on the 86100 DCA Setting Up the 33250A Waveform GeneratorChannel panel Play with the SettingsUsing the Agilent 81133A/81134A Pulse Generator Using the Agilent 81133A/81134A Pulse Generator Pages of the User InterfaceInstrument Panel Channel Pages of the User Interface Instrument Modes Combining Parameters for Signal GenerationCombining Parameters for Signal Generation Pattern Modes NRZ Signal Modes Variable Crossover Measure Function Clock Source Clock SourcesUsing the Agilent 81133A/81134A Pulse Generator Trigger Out Start ModeTiming of Generated Signals Trigger Out Timing of Generated SignalsClock Duty Cycle = 50 % OutputChannel Freq. Divider = PulsesData Pattern Output Trigger OutData Pattern of 32 bits Prbs Data Pattern Burst Started BurstRepetitive Burst Saving and Recalling Settings Jitter ModulationJitter Modulation Saving and Recalling Settings Updating the Firmware Updating the Firmware Troubleshooting Instrument does not Respond TroubleshootingIndex IndexTrigger output levels Index 5988-7401EN