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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
Tas k Set 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:
1 Disable the outputs.
2 In the instrument panel, choose the Pulse/Pattern mode.
3 Set the frequency to 500 MHz.
Channel Settings for the PRBS Signal To set the channel parameters for channel 1:
1 Switch to the Channel page.
2 Select the pattern mode PRBS.
3 Select the PRBS polynome 2
12
-1.
4 Select the signal mode NRZ.
5 In the Levels panel, select the predefined level format ECL.
This automatically sets:
–the Amplitude to 800 mV
–the Offset to –1.350 V
–the Term. Voltage to –2.0 V