If you are using Tsunami on a layout equipped with Digitrax transponding block detection, you will need to configure Tsunami for transponding-friendly operation. Be aware that the Tsunami itself does not transpond - you will need to install an external transponding decoder in your locomotive to achieve this functionality.
Simply program CV 62 to 1 to configure Tsunami for compatibility with external transponding devices. To disable transponding compatibility (default mode), program CV 62 to 0.
Note: Power to the decoder must be cycled before any changes to this CV will take effect.
Tsunami Steam Sound User’s Guide