Here are the settings that work for me to view 720P/23.98P on a standard TV.
Formats –
Prinary (Native) 720P59.94
Secondary (Converted) 525i29.97
– If you tv isn’t 16:9 set cenversion Down to Letterbox.
Analog Outout
Secondary 525i29.97
In FCP make sure you also have AJA Kona 720P59.94 8 Bit set as the video playback.