Keysight N5990A-301 PCI Express Link Training Suite User Guide
39
Using the Software
5
When you change one of these settings, your instruments will
automatically be re-configured.
When the de-emphasis signal converter is connected, or when the
PCIe specification 3.0 or 4.0 is used, the current preset is also
shown. The
Preset
button allows a preset to be selected from a list.
The selected preset is applied to the de-emphasis parameters on
the right side of the main window, and to the encoded preset hint
in the “Loop-back Pattern” box. When the de-emphasis levels on
the right side of the main window are changed, the corresponding
preset is shown in the
PCIe Physical Parameters
panel.
Link Training Pattern
The link training sequence is supposed to train the DUT into
loop-back. By default, it is generated automatically. However, you
have the option to parametrize the sequence to adjust it to the
DUT's needs.
Figure 20
Link Training Pattern Settings
There are two training modes: Fixed and Interactive.
In Fixed mode, the training pattern is defined by several blocks, following
the standard sequence described in the CTS.
