My Motorola DCX-3400-M will have HDMI, component, S-Video and composite all active at the same time – no matter what resolution you set for HDMI and component – the composite and S-video outputs will still output 480i simultaneously.
"My"? "Will have"? Is this something you are buying somewhere? I've only dealt with Pace, SA & Samsung boxes provided by BHN. The Pace was the only one allowed to output anamorphic through composite to eliminate boxing recorded or played by the Mags.