Technical data

Source No Pre-emphasis Level Verification Testing 7
U7232A DisplayPort Compliance Testing Notes 65
No Pre-emphasis Level Verification Test
To evaluate the waveform peak differential amplitude to ensure signal is
neither over, nor under driven. (Reference: Table 3.10 VESA DisplayPort
Standard)
The source is given a range of expected output for each level setting that
correlates with the system budget elements such as cable loss and receiver
eye minimum and max values. This test ensures that the system budget
is obeyed.
The amplitude measurement is performed using the following equation at
all bit rates without pre- emphasis and a PRBS 7 waveform:
Peak- to- peak Voltage = V
H
- V
L
where:
V
H
is the high voltage level
V
L
is the low voltage level
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 18.
2 Connect the W2641A test fixture to the device under test (DUT).
3 If you are using one connection, connect the probe to any channel. If
you are using two connections, connect the two probes to any two
channels of the oscilloscope. If you are using four connections, connect
the four probes to any 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 Driven Setting, the Test Type, the Fixture Type,
Lane- Channel Selection, Connection Settings, and the Connection Type
according to the type of testing being done.