next up previous contents
Next: SPW /RANGE Up: NOEMA languages internal help Previous: SETUP   Contents


        [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 2018-02-21