User guide

Once the de-emphasis function is enabled you can see the de-emphasis

parameters in the PG Output screen.

Again, from the Config window, corrosponding to N4916B, clear the De-

Emphasis function check box. It will disable the de-emphasis function.

If you could proceed until here, the connection of the user software to the N4916B

is ok.

Settings for De-Emphasis Tests

The following are the settings to test the output of the de-emphasis:

• Preset Instrument State

• Set the PRBS 2^7-1

• Set the Data Rate to 3GB/s

• Set the Data Offset to 0V

• Set Data Amplitude to 400mV

• Enable De-Emphasis in the Config window

• Set Pre Cursor to +12dB

• Set Post Cursor 1 to: -6dB

• Set Post Cursor 2 to: -3dB

Check the Output of the N4916B (De-Emphasis Part) Using a Scope

Connect the scope Data out of N4916B

Connect the Trigger In of Scope to Trigger Out of PG

Terminate N4916B Data /Out with 50Ohm

Terminate PG Trigger/Out with 50Ohm

Terminate PG Data/Out with 50Ohm

9 Solving Problems

504 Agilent J-BERT N4903B High-Performance Serial BERT