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Encoder should not go further than +/- 180 degrees from the nominal 90 degree position andle to avoid entangling wires and hoses.  The encoder setting limits are 

For a 10,000K A0V star with H-K ~= 0, the IGRINS Exposure Time Calculator (Version 2.11) gives the following estimates.  Based on the analysis in (INSERT CHAN PARK'S SPIE PAPER LINK HERE) IGRINS ETC v2.11 overestimates S/N, so it actually is ~83% of what IGRINS-ETC reports.  This is reflected in the estimates below.