Agilent Technologies 5988-7401EN Setting Up a Data Pattern

Setting Up Generic and Advanced Signals Setting Up a Data Pattern

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

Setting Up a Data Pattern

Task S et up two signals:

• A PRBS signal to test a digital transmitter.

• A 32-bit pattern signal with NRZ data output format at 500 MHz to

check a digital circuit with ECL logic.

The pattern is:

11110011100110010010100100000000

NOTE This example is demonstrated with the 81134A instrument.

With the 81134A instrument, you can set up both signals

simultaneously.

Using the Graphical User Interface

Instrument Settings To set the instrument parameters:

1Disable the outputs.

2In the instrument panel, choose the Pulse/Pattern mode.

3Set the frequency to 500 MHz.

Channel Settings for the PRBS Signal To set the channel parameters for channel 1:

1Switch to the Channel page.

2Select the pattern mode PRBS.

3Select the PRBS polynome 212-1.

4Select the signal mode NRZ.

5In the Levels panel, select the predefined level format ECL.

This automatically sets:

–the Amplitude to 800 mV

–the Offset to –1.350 V

–the Ter m. Voltage to –2.0 V

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