Keysight M8000 Series of BER Test Solutions User Guide 379
Setting up Patterns 7
• Trigger State - Specifies the trigger state. It can be an Add-in-Card
(AIC) or a root- complex.
• Lane - Specifies the lane number being used.
• Link - Specifies the link number being used.
• Compliance Receive Bit - Specifies whether the compliance received
bit is asserted or deasserted.
• Link Equalization - Determines whether link equalization should be
performed. It can either be aborted after phase 1 (Bypass) or fully
executed. In the second case it can be determined whether only preset
or all (i.e. individual cursor) requests should be accepted.
• Start Preset - Specifies the preset used by the J-BERT’s TX port after
switching to Gen 4 operation and when operating as an upstream
device.
• DUT Preset Hint - Specifies the preset hint being sent by the J-BERT to
the DUT during phase 0 of the link equalization procedure. It is only
used when the BERT operates as upstream device.
• DUT Initial Preset - Specifies the preset the J-BERT transfers to the
DUT in phase 0 of the link equalization procedure. It is only used when
the BERT operates as an upstream device.
• DUT Target Preset - Specifies the preset the J-BERT requests the DUT
to switch to during link equalization. Depending on the role the J-BERT
is playing, this is done in either phase 2 or 3 of the link equalization
training.
• Select Start Preset Gen 4 - User Defined
Defines which values to be used as Start Preset Gen4
• User_Defined - Start Preset (Gen 4) entered by user.
• Start Preset Gen 4 - Start Preset Gen 4 value entered by user (P0 – P9).
• DUT Initial Preset Gen 4 - DUT Initial Preset Gen 4 value entered by
user (P0 – P9).
• DUT Target Preset Gen 4 - DUT Target Preset Gen 4 value entered by
user (P0 – P9, Cursor)
• User Calibrated Presets - Specifies whether BERT's Data Out should
use user-calibrated presets or standard presets during link training.
Enabling it means that BERT’s Data Out will use
de-emphasis/pre-shoot values that had been previously calibrated,
otherwise it will use standard de-emphasis/pre-shoot values defined by
the PCIe3 specification. By default this option is turned off which means
that standard presets will be used.
For further details on link training for PCIe 4.0, refer to Interactive Link
Training on page 435.
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