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AR# 37145

Logicore IP Digital Pre-Distortion (DPD) v4.0 - What is a ALIGN_FAILURE (-120 ) message?

Description

For the Logicore Digital Pre-Distortion (DPD) v4.0 IP what is a ALIGN_FAILURE (-120 ) message?

Solution

The -120 ALIGN_FAILURE occurs when DPD detects that the TX and RX waveforms do not correlate very well after DPDs software alignment routine.  This is a safety feature that keeps DPD from computing invalid coefficients and possibly corrupting the waveform in the Power Amplifier.  

For help on how to debug this issue, please refer to UG776, LogiCORE IP Digital Pre-Distortion v4.0 Debug Interface User Guide, which can be found by going to the DPD Product Page and accessing the Digital Pre-Distortion Evaluation Lounge.

For a detailed list of Digital Pre-Distortion (DPD) Release Notes and Known Issues, see (Xilinx Answer 33521)
AR# 37145
Date Created 05/12/2011
Last Updated 11/10/2014
Status Active
Type General Article
IP
  • Digital Pre-Distortion (DPD)