Matt, thank you for your response. Just to be clear, I'm an audio professional with over 42 years in the chair. I have a number of different digital formats at work in our main control room.
I've got the Panasonic 3800 plugged into the Apollo X8p via an optical cable coming from the optical output of the 3800 into the optical input of the Apollo. All digital outputs of the 3800 are active at all times. There is nothing to set up on the 3800 side.
In the UA console, I have the hardware sample rate set to 44.1kHz, the clock source set to SPDIF, and the Digital Input set to SPDIF. At the bottom of the console window, the clock source indicates SPDIF and is flashing red. The Console I/O Matrix shows 9&10 as SPDIF inputs.
The UA Console software shows nothing coming in when I play the DAT.
In ProTools I've defaulted the I/O Setup and I see the SPDIF inputs listed as inputs 9&10.
This should be A LOT easier than this. There is no one to talk to at UA for even very rudimentary support. I'm appalled that after spending a fair amount of money on various hardware and software UA products, this company can't be bothered to offer even a paid support option.
Dang. Super disappointed.