CPRI Intel® FPGA IP User Guide

ID 683595
Date 7/01/2022

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Document Table of Contents

3.18.1. Delay Measurement and Calibration Features

The CPRI Specification measurement and delay requirements support system configuration and correct synchronization.

The IP core provides the following support for accurate delay measurement:

  • Provides current Rx delay measurement values in the RX_DELAY and RX_EX_DELAY registers.
  • Provides current Tx delay calibration values in the XCVR_BITSLIP register.
  • Provides current round-trip delay measurement value in the ROUND_TRIP_DELAY register.
  • Supports user control over delay measurement accuracy in the TX_EX_DELAY and RX_EX_DELAY registers.
  • If you turn on Enable round-trip delay calibration in the CPRI parameter editor, supports round-trip delay calibration.
  • If you turn on Enable single-trip delay calibration in the CPRI parameter editor, supports single-trip delay calibration.