Pynq MTS on ZCU208 - Example code not working from Xilinx

[anpiri]

Hello,

I am currently experiencing an issue with the Multi-Tile Synchronization (MTS) on my ZCU208 board. A few months ago, MTS was working correctly, but now my DAC and ADC tiles are not synchronizing properly.

Details:

• PYNQ version: 3.0.1

• Board: ZCU208

• Tools: Pynq + MTS GitHub - Xilinx/RFSoC-MTS: A PYNQ overlay demonstrating AMD RFSoC Multi-Tile Synchronization (MTS).

• RFSoC-MTS/boards/ZCU208/notebooks/rfsocMTS.ipynb at main · Xilinx/RFSoC-MTS · GitHub

• I am using the exact example code, nothing changed

Problem:

• MTS alignment fails; captured waveforms from multiple DAC/ADC tiles are no longer synchronized.

• 

• Clock tree verification shows no obvious errors, but cross-correlation checks indicate misalignment.

• I have verified all physical connections and board setup (CLK104, power, cables).

Steps Taken:

1. Initialized tile sync (ol.init_tile_sync())

2. Verified clock tree (ol.verify_clock_tree())

3. Ran tile synchronization (ol.sync_tiles())

4. Captured waveforms for analysis (non-aligned and aligned)

5. Repeated multiple iterations for stability check

Despite following all standard procedures, the MTS alignment is unstable, and the cross-correlation between tiles shows constant misalignment.

Has anyone experienced a similar issue or noticed changes in the PYNQ/MTS drivers that could affect previously working setups? Any guidance on troubleshooting or ensuring proper MTS operation would be greatly appreciated.

I know that it should look like this:

Thank you!