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Controls the red grating.
Format: REDGRAT <angle>
Example: REDGRAT 56478
Synonym: RGRAT
Units: Millidegrees.
Range: 0 to 110000.
Comments: Moves, stops or initialises the Red Grating, or reprograms the SMDM which controls it. Valid parameters are an angle in millidegrees; STOP; INIT and REPROGRAM. The last option should only be used in exceptional circumstances.