I too have tried to set my Oppo 93 to send PCM to my 11a. I set the associated 11a HDMI input to PCM rather than bitstream in accordance with the Cary manual. The 93 displays SACD PCM, but the 11a displays DSD. Being able to link with PCM is important because, as I understand it, DSD does not carry information for bass management unless the disc has a .1 channel, whereas PCM carries that information without a separate .1 channel. Few SACDs have a .1 channel.
Thorens TD 124, SME Series III arm with Ortofon SME 30 H cartridge into Parasound JC-3 phono stage
Ayre C-5xeMP & Oppo BDP-105
Parasound JC-2 preamp into Proceed HPA amps
KEF Reference 107/2 mains & 102 surrounds
Velodyne SMS-1 bass managers & a pair of HGS-15 subs