SHU(OPCS)		Optical Printer Control System		SHU(OPCS)

    NAME
        shu - send the fader shutter to an absolute position in degrees

    USAGE
        shu [degrees]

    EXAMPLE
	shu 120.59    # open fader shutter to 120.59 degrees
	shu 170       # fully open the fader shutter
	shu 0         # fully close the fader shutter

    DESCRIPTION
        Allows the operator to move the fader shutter to a position specified 
	in floating point degrees, and must be in the range 0.00 to 170.00 for
	a 170 degree shutter, 0.00 to 120.00 for a 120 degree shutter (See
	INTERP(OPCSDEFS) for installing fader settings).

    NOTES
        SHU commands during a fade or dissolve will effectively CANCEL the
	fade/dissolve, and will move the fader shutter to the position 
	specified.

    	Keep in mind that, although floating point values such as '0.01' may
	be specified for fader shutter positions, unless your hardware 
	resolution is high enough, the motor hardware may not actually 
	differentiate 0.01 from 0.02. This will be reflected in the display.

	Only the display truncates 2 digits after the decimal point. The 
	hardware will (if it is capable, due to its resolution) recognize 
	54.000594 as a valid position to go to, even though the display will
	say '54.00'.

    SEE ALSO
	-- Operator Commands --
        CAM	  - shoot camera (fades/dissolves too)
        OPN	  - open the fader shutter to 170 degrees
	SHU 	  - send fader shutter to an absolute position
	CLS	  - close the fader shutter to 0 degrees
        DXI/DXO   - set up dissolve in/out
        FDI/FDO   - set up fade in/out

	-- Opcs Setup Commands --
	FLOG      - set Fader LOGarithmic curve for custom fades
	FRANGE    - set fade/dx's degrees range (for Hicon film stocks)
	INTERP    - set interpolation positions (fader, focus, etc)
	SLOP      - correct for slop in a motor (fader, focus, etc)

    ORIGIN
	Gregory Ercolano, Los Feliz California 11/29/89