I might be too late to chime in on this , BUT, once you gat a moded UA5 warm or presence, all the out puts are active. So if your running coax out, Toslink and RCA are ACTIVE. Atleast they are on mine. I have had Coax, Tos, and RCA's all going at once.....Not to sure about the digi mod though. Hope this helps...
peace, jess