User guide

Figure 5-10: Channel Pulse Response
V
t
1UI
Region of Influence
for Fixed Taps
Signal at the
Channel Input
Signal at the
Channel Output
Note: The pulse at the output of the channel shows a long decaying tail. Frequency-dependent losses and
quality degradation affects other signals.
Supported modes for DFE:
• Disabled Mode:
• DFE disabled mode is similar to DFE manual mode, except all DFE tap values in this mode are set
to zero. DFE tap values can be set in Assignment Editor/.qsf or using Avalon MM interface.
• Manual Mode:
• In this mode, manual DFE tap values can be set in Assignment Editor/.qsf or using Avalon MM
interface.
• Continuous Adaptation Mode:
• In this adaptation mode, DFE tap values are controlled by the Adaptive Parametric Tuning Engine.
This mode uses the converged DFE tap values given by the Adaptive Parametric Tuning Engine.
Related Information
How to Enable CTLE and DFE on page 5-12
UG-01143
2015.05.11
Decision Feedback Equalization (DFE)
5-11
Arria 10 Transceiver PHY Architecture
Altera Corporation
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