Thanks for your reply.

It’s a bit complicated :

computer (MacBookPro) -> RME digiface usb set as master clock

Digiface ADAT1 & 2 In & OUT -> RME Fireface 800 as standalone device (terminated by switch),

Digiface ADAT3 IN & OUT -> RME Fireface 400 A as standalone device (terminated by switch)

Digiface ADAT 4 IN & OUT -> RME Fireface 400 B as standalone device  (non terminated) -> Eventide Eclipse + Word clock out of Fireface 400 B to Word clock in on the Eclipse + BNC T connector and 75 ohm terminator

Eclipse clock set on WC.

Hope that makes sense

I also previously tried to sync the Eclipse to the FF40 B using a S/PDIF connection (digital in set to RCA on the Eclipse and clock set to ext) but the clock signal seemed pretty erratic, always switching on / off

Anyway in the meantime I managed to find another BNC T connector and it seems totally stable now.

Do you think I am making a mistake in this setup ?

Thanks

Philippe