% @(#)set_eche.hlq	17.1.1.1 (ESO-IPG) 01/25/02 17:50:39 
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1990 European Southern Observatory
%.IDENT      set_eche.hlq
%.AUTHOR     JDP, IPG/ESO
%.KEYWORDS   MIDAS, help files, SET/ECHELLE
%.PURPOSE    On-line help file for the command: SET/ECHELLE
%.VERSION    1.0  18-DEC-1986 : Creation, JDP
%----------------------------------------------------------------
\se
SECTION./ECHE
\es\co
SET/ECHELLE						16-JUN-1992 PB
\oc\su
SET/ECHELLE par=value [...]
	set echelle keywords
\us\pu
Purpose:    Define the values of parameters in the current session.

\up\sy
Syntax:     SET/ECHELLE par=value [...]
\ys\pa
            par   = parameter name
\ap\pa
            value = parameter value

\ap\no
Note:       a)  Space characters cannot be inserted on the right or left
                part of the sign "=". The name of the echelle keyword
                can be truncated to a non ambiguous root. Number of
                parameter assigned is limited to 8.

            b)  String values can be specified between double quotes.
                The double quote (") is a reserved character and cannot be
                used in a value.

            c)  Short description of echelle keywords is provided by
                HELP/ECHELLE command, values are displayed by SHOW/ECHELLE.

            d)  It is possible to assign a value to echelle keywords using
                monitor assignment. In this case, there must be a space
                on both parts of the sign =. The syntax depends on the
                definition of the keyword (provided by HELP/ECHELLE).
                Examples:
                   ORDREF = "ff456.bdf    "  (keyw. ORDREF/C/1/60)
                   WIDTH1 = 12               (keyw. WIDTH1/I/1/1)
                   MEDFILT(2) = 4.           (keyw. MEDFILT/R/1/3)
                To assign values to character keywords, additional spaces
                must be inserted to overwrite a longer previous value.


            e)  To assign the value of an element of a multiple element
                keyword (e.g. MEDFILT/R/1/3) it is possible to use
                the direct assignment (MEDFILT(2) = 4.) or the SET/ECH by
                inserting comas in place of the values that must not be
                changed.

            f)  The total length of the line is limited to 132 characters.

\on\exs
Examples:
\ex
            SET/ECH ORDR=ff456.bdf  WIDTH1=12  MEDFI=,4 INSTR="NTT EMMI"
\xe \sxe