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        [NOEMAOFFLINE\]SPW    [/RANGE  Fmin  Fmax]   [/FREQUENCY  Fcent  dF]
    [/CHUNK ChunkList] [/LABEL Label]

    Configure and visualize flexible spectral windows in Polyfix  units.   A
    receiver tuning must have been defined (RECEIVER command) and at least a
    baseband must have been selected (BASEBAND command). A typical  sequence
    can be:

    TUNING 230 LSB 7777    : Define the receiver tuning
    BASEBANDS 62.5 HUO     : Select a baseband and assign a correlator mode
    SPW /RANGE 227 227.3   : Configure and plot 1 spectral window
                              (from <~227 to ~>227.3 GHz)
    SPW /FREQUENCY 228 0.2 : Configure and plot a second spectral window
                              of ~>200MHz around 228 GHz)
    SPW /CHUNK 6  30 to 40 : Configure 2 new spectral windows

    The frequency inputs with /RANGE and /FREQUENCY options have to be given
    in the current main frequency axis as defined  with  the  SET  FREQUENCY
    command (REST by default).

    Once  configured,  the  spectral  windows are ordered by resolution then
    frequency then polarization. The  configured  spectral  windows  can  be
    listed  with the LIST command. The RESET command can be used to remove a
    spectral window.

    Feasibility of the setup: SPW returns warnings if the current definition
    of spectral windows is not technically feasible (i.e. if a chunk is used
    by more than 1 spectral window or if the spectral windows in a  correla-
    tor  unit  require  more chunks than available). The warnings have to be
    removed in order to be able to create an observing  script  (SETUP  com-
    mand,  not yet implemented) or to make a summary plot of the setup (PLOT


Gildas manager 2018-08-15