User guide

7
Again, from the Config window, corresponding to M8061A, clear the Mux with
Deemphasis function check box. It will disable the multiplexer function, and
the PG Output screen will allow to control the output levels of Data and Aux
Data at the connectors of the PG again.
If you could proceed until here, you have successfully connected the application
software to the M8061A.
Settings for Multiplexer Tests
The following are the settings to test the output of the M8061A 28 Gb/s Multiplexer
with Deemphasis:
Preset Instrument State.
Set the PRBS 2^7-1.
In the PG-Bit Rate Setup window, set the Data Rate to 3 Gb/s.
Enable Mux with DeEmphasis function in the Config window.
In the M8061A window, set the Data Offset to 0 V.
In the M8061A window, set Data Amplitude to 400 mV.
Check the Output of the M8061A Using a Scope
The approach shown here is checking the output signal using an oscilloscope.
1
Connect the Outputs of the M8061A to an oscilloscope.
2
Connect the Trigger Output of the pattern generator to the trigger input of the
oscilloscope.
3
Terminate M8061A Data /Out with 50 Ohm.
4
Terminate PG Trigger-/Out with 50 Ohm.
5
Terminate PG Data /Out and Aux /Data Out with 50 Ohm.
Then the oscilloscope should show an output eye like the following:
If you see a display like above everything is OK.
Solving Problems 9
Agilent J-BERT N4903B High-Performance Serial BERT 521