Agilent Technologies 5988-7401EN PRBS

Using the Agilent 81133A/81134A Pulse Generator Timing of Generated Signals

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

PRBS

See “Data Pattern” on page 79 for for the timing diagr am.

Characteristics • A PRBS signal can be either generated continuously or can be

started manually or by the a rming source.

The PRBS polynome is selectable from 25 – 1 … 231 – 1.

• The instrument mode is Pulse/Pattern.

• The pattern mode is PRBS.

• You can select between RZ, NRZ and R1 signal modes for e ach

output.

In R1 and RZ modes, the pulse width can be selected as either width

or duty cycle.

• You can select between normal and inverted signals for each output.

• For the clock source, you can select from:

–Internal (YIG Oscillator)

–External signal at Clock Input

–External 10 MHz Reference at Clock Input

For more information about the clock sources, see “Clock Sources”

on page 73.

• The Trigger Out marks every start of the repetitive PRBS, as long as

no frequency divider has been applied.

See “Trigger Out” on page 75.

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