% @(#)scan_eche.hlq	19.1 (ESO-IPG) 02/25/03 14:18:40 
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1990 European Southern Observatory
%.IDENT      scan_eche.hlq
%.AUTHOR     PB, IPG/ESO
%.KEYWORDS   MIDAS, help files, SCAN/ECHELLE
%.PURPOSE    On-line help file for the command: PLOT/ECHELLE
%.VERSION    1.0  30-JUL-1991 Creation  PB
%----------------------------------------------------------------
\se
SECTION./ECHE
\es\co
SCAN/ECHELLE					30-JUL-1991    PB
\oc\su
SCAN/ECHELLE     frame    [scan-par]
	update echelle keywords SCAN\ and IMSIZE.
\us\pu
Purpose:    
            Allows to update keyword SCAN by different options
            (direct input of values, defaults, interactive).
            Parameter SCAN is used by many commands to ignore outside 
            parts of the spectra (order definition, background). 
            It is normally set when starting an echelle session. The
            keyword SCAN is saved by the command SAVE/ECHELLE.
\up\sy
Syntax:     
            SCAN/ECHELLE  frame   [scan-par]
\ys\pa
            frame     = input image, in the space pixel-pixel
\ap\pa
            scan-par  = scan parameters. Default is NOSCAN.

                        Can be:
                        start,end :  limits of the scanned part of the
                                     image, in pixel

                        NOSCAN    :  take 1 and number of rows as default
                                     values.

                        CURSOR    :  optionally creates a graphic window
                                     and prompt for interactive setting.
\ap\no
Note:       
            none
\on\exs
Examples:
\ex
            SCAN/ECHELLE  ccd0008  5,320
\xe\ex
            SCAN/ECHELE   ccd0008  CURSOR
\xe \sxe




