Jim,
Yes the BT LH900 will accept SDI, Composite, Component HD (self sensing 720p, 1080p, 1080i), Component SD, HD SDI (self sensing, 720p, 1080p, 1080i). The component HD will be perfect for the HVX200.
And By the way the same input capabilities will be true for the BT-LH1700 which will be hitting the street this Summer if you want something larger.
Mike Bergeron
Camera Engineer
Panasonic Broadcast