MCS260
CORNERSTONE 260 MONOCHROMATORS
53
16.6 DETAILED COMMAND REFERENCE
This section describes the exact syntax, acceptable parameters, and functionality for every
Cornerstone 260 Command. For each corresponding Query, in braces { }, type of Response
expected is also listed. Where appropriate, the corresponding Hand Controller key, in brackets [ ],
is also listed. Finally, there are some warnings as to possible errors that may occur if a command
is not used properly.
Cornerstone Motion Commands
UNITS TT {UNITS?} [UNITS]
Specifies the operational units designated by the mnemonic parameter “TT”. Possible parameters
are:
“NM” for nanometers, “UM” for micrometers, “WN” for wavenumbers (cm
-1
).
By default, the Cornerstone uses nanometers. Parameters for all motion Statements are handled
in the current units. When changing from nanometers to micrometers, GOWAVE parameter must
be entered in micrometers. Likewise, WAVE? answers will be returned in micrometers. The
response to UNITS? is always the two character mnemonic for the current units.
GOWAVE XXX.XXX {WAVE?} [GO WAVE]
Moves the wavelength drive at maximum speed to the step position closest to the specified
wavelength parameter. This parameter must be in the current units and may be either a floating
point number or an integer, i.e. “GOWAVE 500.00[lf]” and “GOWAVE 500[lf]” will be understood
the same way. For each grating, there is a maximum possible wavelength (approximately 1600 nm
for a 1200 l/mm grating, thus 800 nm for a 600 l/mm, etc.) This command will generate an error if
the parameter is larger than the maximum wavelength. The response to WAVE? will be a floating
point number indicating the exact wavelength position. Current units are assumed and so no units
are passed with the floating point number.
CALIBRATE XXX.XXX [CALIB]
This command is used to make minor corrections to the wavelength calibration of the Cornerstone.
It is used when installing new gratings, or at any point when the wavelength calibration is
disrupted. Execute this command to define the current position as the wavelength specified in the
numeric parameter XXX.XXX. Calculates a new OFFSET for the grating and saves it accordingly.
A calibration procedure is outlined in this user’s manual.
ABORT [ABORT]
Stops any wavelength motion immediately, i.e. GOSCAN, GOWAVE, STEP, etc.
STEP XXXX {STEP?} [STEP UP] / [STEP DOWN]
Moves the wavelength drive by the integer number of steps indicated in XXXX. The parameter can
be positive or negative, however, one step is the smallest increment the Cornerstone can move,
and so this parameter must be an integer. The response to STEP? is the current step position as
measured from the physical home sensors.
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