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