Hitachi's inputs can be accessed on demand via 5 separate video buttons and one Ant button which toggles A/B on the remote. Calibration as I understand it is done via input for component, dvi, composite etc.
Very few RPTV's permit specific grayscale calibration by input. It is usually by signal type ... not by input. 480i / 480p / 1080i / 720p This is about it at best.
There really is no set out there that allows specific calibration on one particular input plug. So if the TV had 10 video inputs, you could do 10 specific calibrations. Sorry. Does not exist.
Pioneers can sort of do it, but not intentionally. You essentially reassign the various modes like std, theater ref, news ... etc to match a certain signal type like composite video or S-video or ... etc. Then you manually select std everytime you watch via the S-video signal.
So if your TV has 10 s-video plugs ... you don't get 10 separate set ups. Just one. Whether on video one or video 9 ... the S-video signal is supposed to look the same.