Vivaldi Audio dropping out with SPDIF input from Trinnov Altitude

[meltemi (Martin)]

@Jack

mutec REF10 SE120 serves as the master clock reference for the Vivaldi Clock and the mutec mc-3+ usb.

In another thread (USB to AES/EBU digital converter)
there was a problem with syncing the Vivaldi Clock to the Mutec REF10 SE120.
The Vivaldi Clock seems to properly sync to the Mutec only in AC mode but not in TTL mode, supposedly because the output level of the Mutec only reaches 2V.