Well, I wonder if it's something else in the video chain then. For the record, here is what I did:
Ran the Advanced setup, and selected all resolutions. Went into the channel up/channel down menu and selected passthru. After I turned the box back on I am getting a non-HD 4:3 480i signal on an HD channel.
Don't get why, but I will keep playing with it till i get it working.
LG 65EF9500 OLED Display
Oppo BDP-203,Schiit Bifrost Multibit DAC, MF V-LINK 192
Parasound P5, Marantz SR-6010, EAD PM 1000 and PM 500 amps
NHT 2.5i (2), NHT AC-1 (1), NHT 1.5 (2), PSB XA (4)
Outlaw Ultra X12 and LFM-1 EX subwoofers