SPW

##
SPW

            [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).  SPW  can  be  used
        only  on  Basebands defined with a correlator mode allowing for the con-
        figuration of high resolution spectral windows. 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
        command).

Subsections

- SPW /RANGE
- SPW /FREQUENCY
- SPW /CHUNK
- SPW /LABEL