HDMI output in RGB or YCbCr mode?

I have a Generation 1 WD TV HD Media Player  WDAVP00BE.
Is the HDMI output in RGB or YCbCr mode?

I could not find this information anywhere in the manual or online.
Thank you for your help.

The WD TV Live defaults to 4:4:4 YCbCr and has options for 4:2:2 YCbCr as well as what it refers to as “RGB High” and “RGB Low”, which I’m assuming are RGB 0-255 and RGB 16-235. It also has an option to select either 8-bit or 12-bit color depth.

Could you guys post here what mode a Generation 1 WD TV HD Media Player WDAVP00BE outputs in? YCbCr or RGB?

All of the LIVEs have the same output as the WDTV HDs.

Where do I set Generation 1 WD TV HD Media Player WDAVP00BE to RGB High? f/w v1.03 (09Nov2009)