Technical data

156 Agilent U7232A DisplayPort Electrical Performance Compliance Test Application
18 Sink Eye Diagram Tests
Sink Eye Diagram Tests
The eye diagram test provides a visual evaluation of the amplitude and
timing variations of the waveform with the overall objective of obtaining a
specified bit error rate in the transmitted data. The test must use a PRBS
7 test pattern at all voltage levels. The test should be performed without
pre- Emphasis.
The sink eye diagram performance provides the best visual assessment of
interoperability potential by showing amplitude and timing minimum and
maximum values.
Test P ro ce du re
1 Start the automated testing application as described in “Starting the
DisplayPort Electrical Performance Compliance Test Application" on
page 22.
2 Connect the W2641A test fixture or other appropriate fixture to the
device under test (DUT).
3 If you are using one connection, connect the probe to one channel. If
you are using two connections, connect the two probes to two channels
of the oscilloscope. If you are using four connections, connect the four
probes to four channels of the oscilloscope.
4 Connect the SMA to SMP cable to the SMA probe head of one of the
probes and to the data lane connector on the W2641A fixture that you
want to test.
5 Connect the other SMA to SMP cable to the other SMA probe head and
to the data lane on the W2641A test fixture that you want to test.
6 In the DisplayPort Compliance Test Application, click the Set Up tab.
7 Set the DUT Definition Settings, Connection Type and Number of
Channels according to the type of testing being done.