Agilent Technologies 5988-7401EN Clock

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

Agilent 81133A/81134A Pulse Generator User’s Guide, January 2005 77

Clock

The following figure shows the typical timing for the clo ck signal.

Characteristics • Pulse period s are generated continuously where:

– Delay and deskew of all channels is zero.

– The duty cycle is fixed at 50%.

• The instrument mode is Pulse/Pattern.

• The pattern mode is Square.

• For the clock source, you can select from:

–Internal (YIG Oscillator)

–External signal at Clock Input

–External 10 MHz Reference at Clock Input

– Direct Internal

–Direct External at Clock Input

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

on page 73.

• Th e Trigger Out is generated with every clock pulse, but can be

optionally divided by any number in the range 1 ... 231 – 1.

See also “Trigger Out” on page 75.

Trigger Out

Output

Channel 1

Output

Channel 2

Freq. Divider = 2

Duty Cycle = 50 %

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