Agilent Technologies 5988-7401EN Start Mode, Trigger Out

Combining Parameters for Signal Generation Using the Agilent 81133A/81134A Pulse Generator

Agilent 81133A/81134A Pulse Generator User’s Guide, January 2005 75

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

• E dge (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 inp ut, the armed m ode

is deactivated (the instrument send s one burst and then stops).

• I n 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 t o 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.

Contents

Main 2 Important Notice WARNING CAUTION Contents Safety Requirements Introduction to the Agilent 81133A/81134A Pulse Generator Operating the Agilent 81133A/81134A Pulse Generator 4 Setting Up Generic and Advanced Signals Setting Up a Clock Signal Setting Up a Pulse Signal Setting Up a Data Pattern Setting Up a Burst Signal Updating the Firmware Troubleshooting Index Page Safety Requirements Safety Summary Environmental Conditions 8 Before Applying Power Ground the Instrument Do not Operate in an Explosive Atmosphere Do not Remove the Instrument Cover Initial Inspection Power Requirements Performance Requirements Ventilation Requirements Page Safety Requirements Declaration of Conformity Declaration of Conformity DECLARATION OF CONFORMITY Page 14 Benefits and Key Features Key Features Overview Front Panel Overview Input and Outputs Page Page Operating the Agilent 81133A/81134A Pulse Generator 20 Navigation through the Pages Page Page How to Change a Number Field Entering New Values 24 Modify Values (Fine-Tu ning) Changing Single Digits Page Setting Up Generic and Advanced Signals Setting Up a Clock Signal Page Page Page Page Page Page Page Setting Up a Pulse Signal 2.5 V 500 mV Pulse Width = 5 ns Period = 20 ns Page Page Page Setting Up a Data Pattern Page Page Page Page Page Setting Up a Burst Signal Page Page Page Page Page Setting Up a Repetitive Burst Signal Page Page Page Page Page Setting Up Signals for a Stressed Eye Diagram Measurement Connecting the Instruments 86100 DCA 81134A Pulse Generator 33250A Arbitrary Waveform Generator Setting Up the 81134A by Using the Graphical User Interface Page Page Setting Up the 33250A Waveform Generator Viewing the Eye Diagram on the 86100 DCA Play with the Settings Using the Agilent 81133A/81134A Pulse Generator Pages of the User Interface Page Combining Parameters for Signal Generation Instrument Modes Page Pattern Modes Signal Modes 111001 RZ R1 NRZ Variable Crossover Clock Sources Page Start Mode Trigger Out Timing of Generated Signals Clock Pulses Data Pattern PRBS Started Burst Repetitive Burst Trigger Out Output Jitter Modulation Saving and Recalling Settings Page Updating the Firmware Prerequisites Page Troubleshooting Page Index Agilent 81133A/81134A Pulse Generator Users Guide, January 2005 89 Index A B C D Index P R S T