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+<HTML>
+<HEAD>
+<TITLE>Hklscan</TITLE>
+</HEAD>
+<BODY>
+<H1>Hklscan</H1>
+<P>
+Hklscan is a command which allows to scan in reciprocal space expressed as
+ Miller indizes on a four circle diffractometer. Prerequisite for this is
+ the existence of a scan object and the hkl-object for doing crystallographic
+ calculations. Make sure the properties of the hkl object (UB, wavelength, NB)
+ have some reasonable relation to reality, otherwise the diffractometer may
+ travel to nowhere. Also it is a good idea to drive the diffractometer to the
+ end points of the intended scan in reciprocal space. hklscan will abort if
+ the requested scan violates diffractometer limits. The commands implemented 
+ are quite simple: 
+<dl>
+<dt>hklscan start fH fK fL
+<dd> sets the start point for the HKL scan. Three values required, one for
+ each reciprocal axis.
+<dt>hklscan step sH sK Sl
+<dd> sets the step width in reciprocal space. Three values required, one for
+ each reciprocal axis.
+<dt>hklscan run NP mode preset
+<dd>executes the HKL scan. NP is the number of points to do, mode is the
+ counting mode and can be either timer or monitor and preset is the preset
+ value for the counter at each step.
+</dl>   
+Data is written automatically into a slightly modified TOPSI data format 
+ file. The status display with topsistatus or scanstatus might be slightly 
+ erratic as it uses two theta as x-axis.  
+</P>
+</BODY>
+</HTML>