ERROR RPC ADC Tiles Failed to Sync Properly

Updated Sep 9, 2026

Reported In

Hardware

  • Ettus USRP X440

Issue Details

When initializing USRP X440 with new master clock rate the following error occurs:

[ERROR] [RPC] ADC tiles failed to sync properly.  

Solution

The issue is caused by USRP X440 ADC hardware failure. Due to ADC implementation specifics, there are 4 tiles which need to be synchronized. Absence of synchronization will cause lowered spurious free dynamic range (SFDR) performance.
To fix the issue hardware repair at NI service center is recommended.