The slit jaws block the edges of the fibers, shrinking their dimension in the echelle dispersion direction, trading loss of light for increased resolution. The data acquisition computer is located in the HET control room, as are motor controls for the CCD focus and cross-disperser tilt, and the power supplies for the lamps and flip mirror in the SSAC Fiber Feed at the telescope prime focus. The data acquisition computer is named ufoe , and is a Pentium PC running Microsoft Windows95. Daytime maintenance of the spectrograph includes filling the liquid Nitrogen dewar twice daily, and changing any manual settings such as slit width or grating mode. Section is intended to familiarize HET users with the UFOE, and provide a detailed description of the spectrograph and its properties.
Section provides instructions on the nightly use of the spectrograph during observations.
Section is a guide for the daytime maintenance personnel who must enter the spectrograph room. Appendix is a glossary of commands and macros used in regular observing procedures, and Appendix shows typical header information output by the current UFOE observing macros. Appendix C is an attached document which contains the images referred to in the text. The images in Appendix C can be downloaded from this site in either Postscript, GIF, or FITS format.