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Controls the Quarter Wave Plate.
Format: QW_POLAR <function> <parameter>
Examples: QW_POLAR MOVE IN
QW_POLAR ROTATE 25
QW_POLAR ANGLE 1800
QW_POLAR STOP ROTATE
Synonyms: QWIN QW_POLAR MOVE IN
QWOUT QW_POLAR MOVE OUT
QWP QW_POLAR ANGLE
QWPROT QW_POLAR ROTATE
Units: Angles are specified in units of a tenth of a degree.
Rotation rates are specified in units of a tenth of a Hz.
Range: Angle in range 0 to 3600.
Rotation rate in range -7 to 118.
Comments: function can have
the values ROTATE, ANGLE, MOVE or STOP.
The parameter for QW_POLAR ROTATE is a rotation
rate in units of a tenth of a Hz, this sets the plate
in continuous rotation.
The parameter for QW_POLAR ANGLE is an angle in
units of a tenth of a degree, this sets the plate to
a fixed angle.
The parameter for QW_POLAR MOVE can be IN or
OUT, this moves the plate in or out.
The parameter for QW_POLAR STOP can be ROTATE
or MOVE, this stops the plate rotating or moving.
Notes:- The wave plate must be in before continuous
rotation is started; and the if the wave plate is
rotating it must be stopped before sending it to a fixed
angle.